ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ

Двигатель может быть использован на транспортных средствах, работающих в режиме переменных нагрузок. Движущиеся поршни расположены в цилиндрах и связаны каждый со своим коленчатым валом при помощи шатунов. Камеры сгорания ограничены стенками цилиндров и днищами поршней. В корпусе установлена качающаяся рама, на которой закреплен коленчатый вал. Рама связана с корпусом управляющим элементом, снабженным вращающимися эксцентриками, установленными на шатунных шейках коленчатого вала, каждый эксцентрик связан с качающейся рамой синхронизирующей передачей, например зубчатой. Изобретение позволяет повысить КПД за счет снижения утечки газов из цилиндров через уплотнения поршней и повысить эффект регулирования рабочего объема цилиндров. 4 ил.

СПОСОБ УПРАВЛЕНИЯ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ И УСТРОЙСТВО УПРАВЛЕНИЯ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к способу управления для двигателя внутреннего сгорания. Механизм (5) переменной степени сжатия является многозвенным поршневым кривошипно-шатунным механизмом, состоящим из множества звеньев, связывающих поршень 4 и коленчатый вал (6). Нагрузка от сгорания действует в направлении прижатия поршня (4) в направлении вниз. Соответственно, скорость отклика при изменении степени сжатия в сторону низкой степени сжатия выше скорости отклика при изменении степени сжатия в сторону высокой степени сжатия. Следовательно, скорость отклика в сторону низкой степени сжатия задается выше скорости отклика в сторону высокой степени сжатия. При этом изменение в сторону низкой степени сжатия изменяется со скоростью отклика выше скорости отклика для стороны высокой степени сжатия без соответствия скорости отклика на стороне высокой степени сжатия. Соответственно, представляется возможным пресекать ухудшение отклика. 2 н. и 5 з.п. ф-лы, 7 ил.

УСТРОЙСТВО К КРИВОШИПНОМУ МЕХАНИЗМУ ДВИГАТЕЛЯ ДЛЯ ТОЧНОГО РЕГУЛИРОВАНИЯ ЕГО СТЕПЕНИ СЖАТИЯ

Изобретение относится к двигателям внутреннего сгорания с автоматически изменяемой степенью сжатия. Маховики и зубчатые венцы, расположенные в эксцентричных корпусах, размещены внутри пустотелого кривошипного вала двигателя. Торсионные шестерни входят в зацепление с зубчатыми венцами. Маховики связаны между собой кривошипным валом. Регуляторный вал с помощью кривошипа шарнирно соединен с маховиком, ленточной резьбой - с его эксцентричным корпусом, а посредством шлиц - с ведущей шестерней газораспределительного механизма. Регуляторный вал через упорный подшипник воздействует на передвижение поршня регулятора, а от поршня через рычажную систему - на срабатывающее устройство для ограничения подачи дроссельной заслонки. Одновременно поршнем регулятора сжимается спиральная нагрузочная пружина. Регулирование степени сжатия осуществляется давлением сжатого воздуха, который подаeтся в надпоршневое пространство регулятора. Технический результат заключается в повышении мощности и экономичности двигателя ...

СПОСОБ ИЗМЕНЕНИЯ СТЕПЕНИ СЖАТИЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение может быть использовано в двигателях внутреннего сгорания. Способ изменения степени сжатия двигателя внутреннего сгорания заключается в изменении объема камеры сгорания, которое обеспечивается посредством перемещения управляющего элемента, поршня и шатуна (14). Шатун (14) кинематически связан с коленчатым валом (13) и с управляющим элементом. Кинематическую связь осуществляют двуплечим ломаным рычагом. Одно плечо двуплечего ломаного рычага выполняют в виде качающейся на оси управляющего элемента кулисы (1). Второе плечо выполняют в виде рычага (11), воздействующего на коленчатый вал (13). Камень (5) кулисы (1) соединяют с шатуном (14) по крайней мере одного цилиндра (16) двигателя. Управляющий элемент выполняют по крайней мере в виде одной двухступенчатой зубчатой передачи. По крайней мере одну ступень зубчатой передачи осуществляют червячной парой. Технический результат заключается в упрощении конструкции устройства изменяющего степень сжатия. 7 з.п. ф-лы, 10 ил.

УСТРОЙСТВО УПРАВЛЕНИЯ И СПОСОБ УПРАВЛЕНИЯ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение может быть использовано в системах управления двигателями внутреннего сгорания. Предложено устройство и способ управления для двигателя, в которых пары топлива, сформировавшиеся в топливном баке 41, поступают в бачок 42 улавливания паров топлива и накапливаются в нем. Из бачка, во время приведения в действие двигателя 1, пары топлива вводятся во впускную систему 18 двигателя. Предложенное устройство содержит средство, выполненное с возможностью обнаруживать состояние, в котором пары топлива скопились в бачке улавливания паров топлива, во время приведения в действие двигателя после его прогрева. После заполнения бачка улавливания паров топлива до определенного уровня, пары топлива продуваются во впускную систему двигателя с помощью уменьшения степени механического сжатия посредством механизма 2 изменения степени сжатия. Также предложен способ управления для двигателя. Технический результат заключается в повышении скорости продувки паров топлива из бачка, в результате чего предотвращается ...

УСТРОЙСТВО ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к двигателестроению, а именно к двигателям внутреннего сгорания с противоположно движущимся поршнями и воспламенением топливовоздушной смеси от сжатия. Двигатель содержит камеру сгорания с изменяющейся степенью сжатия посредством дополнительного поршня. В нем применена гидропневматическая система, состоящая из гидравлического распределителя кранового типа, гидропневматического аккумулятора и насоса шестеренчатого типа, создающего давление 80 - 100 кг/см2, а степень сжатия в камере сгорания изменяется от 6 - 7 до 20 - 23. Изобретение обеспечивает повышение надежности и экономичность двигателя. 7 ил.

УСТРОЙСТВО УПРАВЛЕНИЯ ДВИГАТЕЛЕМ И СПОСОБ УПРАВЛЕНИЯ ДВИГАТЕЛЕМ

Изобретение относится к устройству управления двигателем и способу управления двигателем. Двигатель включает в себя механизм с переменной степенью сжатия, выполненный с возможностью изменять степень сжатия двигателя, и нагнетатель, выполненный с возможностью подавать сжатый воздух в двигатель. Устройство управления двигателем, которое управляет двигателем, управляет механизмом с переменной степенью сжатия посредством задания целевой степени сжатия таким образом, что чем выше скорость отклика при повышении давления нагнетания посредством нагнетателя, тем ниже целевая степень сжатия. Техническим результатом является подавление детонации в двигателе с переменной степенью сжатия. 2 н. и 9 з.п. ф-лы, 15 ил.

АДАПТИВНЫЙ МНОГОТОПЛИВНЫЙ ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ

Двигатель внутреннего сгорания способен адаптироваться к работе на различных видах топлива и изменяющейся в процессе его эксплуатации нагрузке. Двигатель состоит из нескольких автономно работающих модулей, число которых может изменяться в зависимости от величины нагрузки, и снабжен главным микропроцессором, входы которого связаны с контроллером органа управления и датчиком числа оборотов вала двигателя, а выходы -с механизмами включения - отключения модулей. Каждый модуль снабжен вспомогательным микропроцессором, входы которого связаны с выходами главного микропроцессора, детонационными датчиками, датчиками определения верхних и нижних мертвых точек поршней, а выходы - с приводным механизмом изменения степени сжатия и рабочего объема, имеющим реверсивный элемент, и с топливодозирующими устройствами системы топливоподачи, причем реверсивные элементы соединены с осями качания рычагов, каждый из которых соединен с шарниром сочлененного шатуна, и выполнены с возможностью возвратно-поступательного ...

СПОСОБ РЕГУЛИРОВАНИЯ МНОГОТОПЛИВНОГО ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ С УВЕЛИЧЕННЫМ ХОДОМ ПОРШНЯ МЕТОДОМ ИЗМЕНЕНИЯ СТЕПЕНИ СЖАТИЯ И МНОГОТОПЛИВНЫЙ ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ С УВЕЛИЧЕННЫМ ХОДОМ ПОРШНЯ

Изобретение относится к многотопливным двигателям внутреннего сгорания с увеличенным ходом поршня и способам их регулирования за счет изменения степени сжатия путем изменения положений мертвых точек. Для увеличения хода поршня формируют воздействие на шарнир сочлененного шатуна, смещают шарнир сочлененного шатуна от оси цилиндра при достижении поршнем нижней мертвой точки, определяемой радиусом кривошипа коленчатого вала и длиной сочлененного шатуна, что изменяет положение нижней мертвой точки, и затем возвращают шарнир к оси цилиндра. Изменение степени сжатия также достигается изменением положения верхней мертвой точки, которое производят при возврате шарнира к оси цилиндра. Формирование воздействия на шарнир сочлененного шатуна осуществляют путем перемещения оси качания маятникового рычага, связанного с шарниром, по прямой линии, пересекающей ось цилиндра. При этом перемещением оси качания маятникового рычага управляет профилированный кулачок, кинематически связанный с коленчатым валом ...

АДАПТИВНЫЙ МНОГОТОПЛИВНЫЙ ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ

... 1. Адаптивный многотопливный двигатель внутреннего сгорания, содержащий корпус, цилиндры с крышками, поршни, размещенные в цилиндрах, коленчатый вал, шатуны, состоящие из двух шарнирно соединенных между собой частей, одна из которых связана с поршнем, а другая - с кривошипом коленчатого вала, рычаги, каждый из которых соединен с шарниром шатуна, приводные механизмы изменения степени сжатия и рабочего объема в каждом цилиндре, связанные с осями качания рычагов с возможностью перемещения их осей качания, системы топливоподачи, смазки и охлаждения двигателя и орган управления двигателем, отличающийся тем, что двигатель выполнен по меньшей мере из двух модулей и снабжен главным микропроцессором, входы которого связаны с контролером органа управления и датчиком числа оборотов вала двигателя, а выходы - с механизмами включения-отключения модулей, каждый модуль снабжен вспомогательным микропроцессором, входы которого связаны с выходами главного микропроцессора, детонационными датчиками, датчиками ...

СПОСОБ УПРАВЛЕНИЯ ДВИГАТЕЛЕМ ВНУТРЕННЕГО СГОРАНИЯ И УСТРОЙСТВО УПРАВЛЕНИЯ

Изобретение относится к управлению двигателем внутреннего сгорания, снабженным механизмом переменной степени сжатия. Изобретение включает: механизм (10) переменной степени сжатия для изменения степени сжатия двигателя согласно угловому положению вала (14) управления; приводной мотор (20), который приводит во вращение вал (23) вращения; и многозвенный механизм (21) для механического соединения вала (14) управления и вала (23) вращения. Многозвенный механизм (21) имеет коэффициент редукции (коэффициент ослабления), который является отношением величины поворота вала (23) вращения и величины поворота вала (14) управления, и который изменяется согласно угловому положению вала (14) управления. Задается разрешаемое давление в цилиндре, которое является разрешаемым предельным давлением в камере сгорания двигателя внутреннего сгорания. Разрешаемое давление в цилиндре при степени сжатия двигателя, когда коэффициент редукции становится низким, задается ниже давления в цилиндре при степени сжатия двигателя ...

СПОСОБ УПРАВЛЕНИЯ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ И УСТРОЙСТВО УПРАВЛЕНИЯ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

СПОСОБ ИЗМЕНЕНИЯ СТЕПЕНИ СЖАТИЯ И ИЗМЕНЕНИЯ ОТНОШЕНИЯ ВОЗДУХА К ТОПЛИВУ В ДВИГАТЕЛЕ ВНУТРЕННЕГО СГОРАНИЯ

Двигатель внутреннего сгорания с переменным ходом поршня

Изобретение позволяет повысить эффективность регулирования степени сжатия за счет ее изменения при незначительном изменении рабочего объема двигателя и незначительном перемещении приводного звена, что позволяет также упростить приведение расчетных показателей двигателя к действительным При изменении положения рычага 10, качающегося в корпусе 1 вокруг оси, проходящей через точку 16, при помощи червячной передачи 15, 12, связанной с электродвигателем 14, происходит изменение степени сжатия двигателя Так как длины рычага 10 и коромысла 9 равны, а ось качания рычага 10 проходит через точку 16, совпадающую с осью крепления шатуна 4 с коромыслом 9 при положении поршня 3 в НМТ, то на всех режимах регулирования степени сжатия двигателя положение поршня 3 относительно цилиндра 2 в НМТ будет неизменным, т е неизменным будет полный объем двигателя, а изменяются объемы камеры сгорания и рабочий. 5 ил ...

Verfahren und System zum Betrieb eines Innenbrennkraftmotors mit Funkenzündung und Direkteinspritzung, der Betriebsarten mit variablem Kompressionsverhältnis hat

Verfahren zum Betrieb eines Innenbrennkraftmotors mit Funkenzündung und Direkteinspritzung und variablem Kompressionsverhältnis, gekennzeichnet durch: Feststellen eines geforderten Ausgangsdrehmoments des Motors; Ermitteln eines laufenden Verbrennungsmodus und einer laufenden Kompressionsverhältnisbetriebsart des Motors; Überführen des Motorbetriebs vom laufenden Verbrennungsmodus in einen neuen Verbrennungsmodus zur Erzeugung des geforderten Ausgangsdrehmoments; und Überführen des Motorbetriebs von der laufenden Kompressionsverhältnisbetriebsart in eine neue Kompressionsverhältnisbetriebsart, um Drehmomentfluktuationen während des Übergangs vom laufenden Verbrennungsmodus in den neuen Verbrennungsmodus zu verringern.

Verbrennungsmotor mit veränderbaren Hubraum und Verdichtungsverhältnis

Verfahren zum Betreiben eines Mehrgelenkskurbeltriebs für eine Brennkraftmaschine sowie entsprechender Mehrgelenkskurbeltrieb

Die Erfindung betrifft ein Verfahren zum Betreiben eines Mehrgelenkskurbeltriebs (8) für eine Brennkraftmaschine (1), mit wenigstens einem drehbar auf einem Hubzapfen einer Kurbelwelle (2) gelagerten Koppelglied (9) und wenigstens einer drehbar auf einem Hubzapfen (17) einer Exzenterwelle (6) gelagerten Anlenkpleuelstange (13), wobei das Koppelglied (9) schwenkbar mit einer Kolbenpleuelstange (4) eines Kolbens (3) der Brennkraftmaschine (1) schwenkbar mit der Anlenkpleuelstange (13) verbunden ist, wobei die Exzenterwelle (6) mittels einer Stellvorrichtung (22) auf eine Solldrehwinkelstellung eingestellt wird, und wobei eine Istdrehwinkelstellung der Exzenterwelle (5) mittels eines Drehwinkelsensors (29) ermittelt wird. Dabei ist vorgesehen, dass die Iststromstärke des zum Einhalten der Solldrehwinkelstellung von der Stellvorrichtung (22) benötigten Stroms ermittelt wird, und dass bei Unterschreiten einer Schwellenstromstärke durch die Iststromstärke auch bei Übereinstimmung der Istdrehwinkelstellung ...

Verfahren zum Betreiben eines Verbrennungsmotors mit einem einstellbaren Verdichtungsverhältnis und Steuerungseinrichtung zur Durchführung des Verfahrens

Verfahren zum Betreiben eines Verbrennungsmotors mit einem einstellbaren Verdichtungsverhältnis, der eine Kurbelwelle aufweist, an der eine Pleuelstange mindestens eines Zylinders angreift, deren effektive Pleuelstangenlänge über jeweils eine Exzenter-Verstelleinrichtung der jeweiligen Pleuelstange zur Verstellung des Verdichtungsverhältnisses derart verstellt wird, dass abhängig von definierten Betriebsbedingungen ein einer gewünschten effektiven Pleuelstangenlänge entsprechender Verdichtungsverhältnis-Sollwert bestimmt, dieser Sollwert mit einem einer tatsächlichen effektiven Pleuelstangenlänge entsprechenden Verdichtungsverhältnis-Istwert verglichen und dann, wenn der Sollwert mit dem Istwert nicht übereinstimmt, über eine Hydraulikdruckansteuerung ein Umschaltventil der jeweiligen Exzenter-Verstelleinrichtung derart angesteuert wird, dass die jeweilige Exzenter-Verstelleinrichtung die effektiven Pleuelstangenlänge der jeweiligen Pleuelstange ändert, wobei permanent der Hydraulikdruck ...

Umschaltventileinheit und Verbrennungsmotor mit einer solchen Umschaltventileinheit

Umschaltventileinheit (36) für einen Verbrennungsmotor, welcher ein einstellbares Verdichtungsverhältnis aufweist, nämlich zum Steuern eines Hydraulikölstroms in Hydraulikkammern (22, 23) einer Exzenter-Verstelleinrichtung, wobei die Hydraulikkammern (22, 23) über Hydraulikölzulaufleitungen (24, 25) mit Hydrauliköl befüllbar sind, und wobei abhängig von der Schaltstellung der Umschaltventileinheit (36) ein Entlüften der Hydraulikkammern (23, 24) über Hydraulikölablaufleitungen (30, 31) zugelassen oder nicht zugelassen ist. Die Umschaltventileinheit (36) verfügt über ein Betätigungsmodul (53) mit einem linear verlagerbaren Abgriffselement (37), über ein Ventilmodul (56) mit als Sitzventilen ausgebildeten, den Hydraulikölablaufleitungen (30, 31) zugeordneten Entlüftungsventilen (41, 42), und über Betätigungsstangen (39, 40), die durch das Abgriffselement (37) des Betätigungsmoduls (53) linear verlagerbar sind und welche die Entlüftungsventile (41, 42) des Ventilmoduls (56) und damit die Hydraulikölablaufleitungen ...

Piston with adjustable compression height for combustion engines

In a piston, the compression height of which can be adjusted during operation of the engine by control chambers (8, 9), to which oil is admitted, provided in the piston, it is proposed that the oil be introducible at constant pressure into the control chamber system (8, 9) irrespective of the engine speed. To this end a pressure control valve (15) is provided upstream of the inlet valve (12) of the control chamber system (8, 9). This pressure control valve may be incorporated, for example, into the piston pin (5). ...

System und Verfahren zum Einstellen einer wirksamen Länge einer Pleuelstange sowie Brennkraftmaschine

Die vorliegende Erfindung betrifft ein System (100) und ein Verfahren zum Einstellen einer wirksamen Länge einer längenverstellbaren Pleuelstange (1) für eine Brennkraftmaschine, insbesondere Hubkolbenmaschine, sowie eine Brennkraftmaschine mit einer solchen längenverstellbaren Pleuelstange. Ein erster Pleuelteil (4) und ein zweiter Pleuelteil (5) der Pleuelstange (1) sind mittels einer Längenverstelleinrichtung (16) in Richtung einer Längsachse (1a) der Pleuelteile (4, 5) zu- und/oder ineinander verschiebbar. Der erste Pleuelteil(4) und zweite Pleuelteil (5) bilden eine erste Hydraulikkammer (9), die in einer ersten Schaltstellung der Pleuelstange (1) mit einem Hydraulikmedium befüllt ist, und eine zweite Hydraulikkammer (10), die in einer zweiten Schaltstellung mit dem Hydraulikmedium befüllt ist. Dabei ist die Längenverstelleinrichtung (16) über wenigstens eine Hydraulikzuleitung (13) mit einem Hydraulikmedium beschickbar. Eine Pumpe (35) ist dabei dazu eingerichtet, das Hydraulikmedium ...

Umschaltventil und Verbrennungsmotor mit einem solchen Umschaltventil

Umschaltventil für einen Verbrennungsmotor, welcher ein einstellbares Verdichtungsverhältnis aufweist, nämlich zum Steuern eines Hydraulikölstroms für eine Exzenter-Verstelleinrichtung des Verbrennungsmotors, mit einem mit einer Rückstellfeder (40) zusammenwirkenden Steuerkolben (39), der abhängig von seiner Schaltstellung den Hydraulikölstrom steuert, und mit einem Schaltmechanismus für den Steuerkolben (39), über welchen der Steuerkolben (39) zwischen Schaltstellungen verlagerbar ist, nämlich zwischen einer ersten Schaltstellung, in welche der Steuerkolben (39) durch eine Federkraft der Rückstellfeder (40) verlagerbar ist, und einer zweiten Schaltstellung, in welche der Steuerkolben (39) entgegen der Federkraft der Rückstellfeder (40) verlagerbar ist, dadurch gekennzeichnet, dass der Schaltmechanismus eine Stützhülse (43) aufweist, auf welcher der Steuerkolben (39) verschiebbar geführt ist, dass der Schaltmechanismus weiterhin einen zumindest abschnittsweise in der Stützhülse (43) geführten ...

Brennkraftmaschine mit variablem Verdichtungsverhältnis

Brennkraftmaschine mit Verwendung eines Motors zum Verändern des Kompressionsverhältnisses und Verfahren zur Regelung der Brennkraftmaschine

Prime mover e.g. thermal engine, has drive section describing path around rotation center, which is characterized by flow of eccentricity and movement of piston, which is subjected with load between upper and lower dead centers

The prime mover has a drive section, which intermediates a guide on an eccentricity (6), describing a path around a rotation center (7), which is characterized by a complete flow of eccentricity and movement of piston (2), which is subjected with a load between an upper dead center and a lower dead center. Significant and relatively different geometrically formed path segments (8a, 8b) are provided by the process flow. An independent claim is also included for a method for operating the prime mover for conducting and/or influencing process characteristics of medium, substance and/or elements.

Unterhebel eines Kurbelmechanismusses einer Brennkraftmaschine

Vorrichtung zum Verändern der Verdichtung eines Zylinders einer Hubkolbenbrennkraftmaschine

Vorrichtung zum Verändern der Verdichtung eines Zylinders einer Hubkolbenbrennkraftmaschine mit einem Kolben (6), an dem ein Ende eines Pleuels (8) gelagert ist, dessen anderes Ende an einer Kurbelwelle (10) gelagert ist, wobei das Pleuel (8) an dem Kolben (6) über einem Exzenter (16) gelagert ist und die Drehstellung des Exzenters zur Veränderung der Verdichtung veränderbar ist und der Exzenter starr mit einer Exzenterschwinge (24) verbunden ist, die mittels einer am Maschinengehäuse (2) angebrachten Stelleinrichtung (26, 28) verschwenkbar ist, dadurch gekennzeichnet, dass zur Führung der Bewegung der Exzenterschwinge (24) und/oder der Stellkoppel (26) während der Auf- und Abwärtsbewegung des Kolbens eine Führungseinrichtung (40, 42; 44) vorgesehen ist.

Reciprocating piston engine has eccentrically stored and adjusted crankshaft and detection device of one or multiple effective eccentric moments

The reciprocating piston engine (1) has an eccentrically stored and adjusted crankshaft (2) and a detection device (6) of one or multiple effective eccentric moments. A tripping device (7) is provided that causes an eccentric adjustment of the crankshaft by utilization of an effective eccentric moment. Multiple serially arranged stroke pistons (3) are connected over the crankshaft. An independent claim is included for a method for changing an adjustable compression ratio at a reciprocating piston engine adjusting a crankshaft.

Compression ratio changing arrangement for combustion engine i.e. Otto engine, has spring unit partially absorbing gas and mass forces acting at positioning device during operation of engine in relation to actuating device

The arrangement (10) has a positioning device (12) changing position of a piston (16) relative to a cylinder (18) of a combustion engine for adjusting compression ratio. An actuating device (20) i.e. servo-motor, is in effective connection with the device (12) for actuating the device (12). A spring unit (22) e.g. spiral spring, partially absorbs gas and mass forces acting at the device (12) during operation of engine in relation to actuating device. The unit is arranged and dimensioned such that retaining forces and/or moments acting at the actuation device act only in a certain direction.

Rotating cylinder valve engine

Plunger piston with variable compression ratio

A plunger piston adapted for variable compression ratio for internal combustion engines is provided in which piston parts arranged telescopically one within another render possible a variation of compression ratio dependent upon the combustion chamber pressure, by variation of volume of fluid-filled control chambers. A pressure-limiting valve 6 is connected to one control chamber 4 of the piston so that the guide path for its spring-loaded closure body 9 is inclined in relation to the longitudinal axis of the piston. This arrangement achieves a regulating characteristic independent of engine speed.

Diagnostic method and system for a variable compression ratio internal combustion engine

A diagnostic method and system for a motor vehicle having an internal combustion engine operable in a plurality of compression ratio operating states includes the steps of determining a change in spark adjustment required to avoid knock 204, 208 as the engine is operated in selected ones of the various compression ratio operating states, and evaluating operation of the internal combustion engine based at least in part on the change in spark adjustment. The evaluation may be determined from the differences between the adjustments required at different compression ratios.

Variable compression ratio engine

A method and system for inferring intake manifold pressure of a variable compression ratio engine

A diagnostic method for a variable compression ratio engine

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

COMBUSTION ENGINE EXECUTION

RIGGING DEVICE FOR AN ENGINE WITH VARIABLE COMPRESSION RATIO

PROCEDURE AND SYSTEM FOR CONTINUOUS CONTROL OF THE POSITION OF AN ACTUATOR FOR CHANGING THE COMPRESSION RATE OF A HEAT ENGINE

Reciprocating piston engine with connecting rod with two helical gear units

Die Erfindung betrifft eine Hubkolbenmaschine mit einer Kurbelwelle (19) mit zumindest einer längenverstellbaren Pleuelstange (1) mit zumindest einem ersten Stangenteil (2) und einem zweiten Stangenteil (4), welche beiden Stangenteile (2, 4) relativ zueinander in Richtung der Längsachse (1a) der Pleuelstange (1) verschiebbar und über ein Schraubgetriebe (6) miteinander verbunden sind, wobei das Schraubgetriebe (6) zumindest eine Schraubgetriebeeinheit (6a, 6b) mit einem ersten Getriebeteil (7a, 7b) und einem mit dem ersten Getriebeteil (7a, 7b) im Gewindeeingriff stehenden achsgleichen zweiten Getriebeteil (8a, 8b) aufweist, wobei erster (7a, 7b) und zweiter Getriebeteil (8a, 8b) koaxial bezüglich einer gemeinsamen parallel zur Längsachse (1a) der Pleuelstange (1) angeordneten Schraubachse (11a, 11b) ausgebildet sind, wobei das Schraubgetriebe (6) nicht selbsthemmend ausgebildet ist, und wobei ein erster Getriebeteil (7a, 7b) mit zumindest einer mittels zumindest einer Schalteinrichtung ...

Control device for determining a defect for a VCR connecting rod

Die vorliegende Erfindung betrifft eine Steuervorrichtung für ein VCR-Pleuel (6.1, 6.2, 6.3), das mittels einer Ansteuerschaltung (25.1) betätigbar ist. Ein solches VCR-Pleuel (6.1, 6.2, 6.3) soll einen sicheren Betrieb ermöglichen. Hierzu ist eine Detektionseinrichtung (42) zum Ermitteln eines Defekts der Ansteuerschaltung (25.1) vorgesehen. Des Weiteren bezieht sich die Erfindung auf ein entsprechend zugehöriges Verfahren zum Betreiben einer Ansteuerschaltung (25.1) eines VCR-Pleuels (6.1, 6.2, 6.3) eines Verbrennungsmotors.

System and method for adjusting an effective length of a connecting rod and internal combustion engine

Die vorliegende Erfindung betrifft ein System (100) und ein Verfahren zum Einstellen einer wirksamen Länge einer längenverstellbaren Pleuelstange (1) für eine Brennkraftmaschine, insbesondere Hubkolbenmaschine, sowie eine Brennkraftmaschine mit einer längenverstellbaren Pleuelstange (1) und einem solchen System (100). Die Pleuelstange (1) weist zumindest einen ersten Pleuelteil (4) und einen zweiten Pleuelteil (5) auf, wobei die beiden Pleuelteile (4, 5) mittels einer Längenverstelleinrichtung (16) in Richtung einer Längsachse (1a) der Pleuelteile (4, 5) zu- und/oder ineinander verschiebbar sind. Die Längenverstelleinrichtung (16) ist über wenigstens eine Hydraulikzuleitung (13) mit einem Hydraulikmedium beschickbar, und eine Messeinrichtung (37) ist dazu eingerichtet, eine Viskosität des Hydraulikmediums in der Hydraulikzuleitung (13) zu ermitteln. Eine Druckregulierungseinrichtung (35) kann das Hydraulikmedium in der Hydraulikzuleitung (13) mit einem Ausgangsdruck zum Verschieben der ...

Hydraulisches Steuerventil für eine längenverstellbare Pleuelstange mit geteilter Drainage

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (1) für einen Kolbenmotor, wobei die Pleuelstange (1) ein erstes Pleuelauge (7) zur Aufnahme eines Kolbenbolzens und ein zweites Pleuelauge (4) zur Aufnahme eines Kurbelwellenzapfens aufweist, wobei der Abstand zwischen dem Kolbenbolzen und dem Kurbelwellenzapfen in Längsrichtung (A) der Pleuelstange (1) mittels einer hydraulischen Steuereinrichtung (21) mit hydraulischem Steuerventil (34) einstellbar ist. Die hydraulische Steuereinrichtung (21) weist einen Steuerzylinder (36), einen in dem Steuerzylinder (36) verschiebbar geführten, mit Druck beaufschlagbaren Steuerschieber (35) und zwei vom Steuerschieber (35) betätigbare Ablassventile (41, 42) auf, wobei ein Ablassventil (42) mit einem überdrucklosen Abflusskanal (32) verbunden ist, um ausströmendes Hydraulikmittel an die Umgebung abzugeben. Darüber hinaus betrifft die Erfindung die Verwendung einer derartigen längenverstellbaren Pleuelstange (1) mit einer hydraulischen ...

Adjustable length connecting rod recess

Die Erfindung betrifft ein längenverstellbares Pleuel für eine Hubkolbenmaschine, insbesondere für eine Hubkolbenbrennkraftmaschine, eine Hubkolbenmaschine und ein Fahrzeug, wobei eine wirksame Pleuellänge des Pleuels veränderbar ist, wobei das Pleuel zur Veränderung der wirksamen Pleuellänge eine hydraulische Längenverstelleinrichtung aufweist, die wenigstens eine Ventilausnehmung (6A, 6B, 8A, 8B) mit einer Innenfläche, wenigstens eine Ventileinrichtung, und wenigstens ein Sicherungsmittel (9) aufweist. Die Ventileinrichtung ist dabei zum zumindest teilweisen Steuern der Längenverstelleinrichtung ausgebildet und wenigstens ein Bauteil der Ventileinrichtung ist in der Ventilausnehmung (6A, 6B, 8A, 8B) angeordnet und mittels des Sicherungsmittels (9) gegen ein Herausfallen aus der Ventilausnehmung (6A, 6B, 8A, 8B) gesichert, wobei das Pleuel eine Ausnehmung (13) aufweist, welche einen Abfluss von Hydraulikmedium aus der Ventilausnehmung (6A, 6B, 8A, 8B) ermöglicht, wobei die Ausnehmung ( ...

Gate valve for a longitudinally adjustable connecting rod

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (1) für einen Kolbenmotor mit einer hydraulischen Steuereinrichtung (21) zum Einstellen der Wirklänge der längenverstellbaren Pleuelstange (1). Die hydraulische Steuereinrichtung (21) weist ein hydraulisches Steuerventil (34) mit einem Steuerzylinder (36), einem Steuerschieber (35) und mindestens einem vom Steuerschieber (35) betätigbaren Ablassventil (41, 42) auf, wobei der Steuerschieber (35) ein in dem Steuerzylinder (36) verschiebbar geführten, mit einem hydraulischen Steuerdruck beaufschlagbaren Steuerkolben (37) und einem Schieberstößel (39) umfasst. Weiter ist eine fest mit dem Steuerschieber (35) verbundene Zusatzmasse (57) vorgesehen, um den Steuerschieber (35) auf verschiedene Motortypen anzupassen. Darüber hinaus betrifft die Erfindung einen Steuerschieber (35) für das hydraulische Steuerventil (34) einer längenverstellbaren Pleuelstange (1) sowie ein Kolbenmotor mit zumindest einer derartigen längenverstellbaren ...

Connecting rod

Es wird eine Pleuelstange für eine Verbrennungskraftmaschine mit einem Schaft (1) und zwei Pleuelaugen (2, 3), von denen das einen Kolbenbolzen aufnehmende Pleuelauge (3) einen ein Bolzenlager (5) bildenden anschlagbegrenzt drehbaren Exzenter (4) aufweist, mit einem im Schaft (1) gelagerten, mithilfe eines Umschaltventils (19) gegensinnig beaufschlagbaren hydraulischen Stelltrieb und mit einem Zahnrad-Übersetzungsgetriebe (12) zwischen dem hydraulischen Stelltrieb und dem mit einem Zahnkranz (8) versehenen Exzenter (4) beschrieben. Um vorteilhafte Konstruktionsverhältnisse zu schaffen, wird vorgeschlagen, dass der hydraulische Stelltrieb einen beidseitig beaufschlagbaren Drehkolben (14) und einen mit dem Drehkolben (14) drehfest verbundenen Zahnkranz (22) umfasst, der mit dem Eingangszahnrad (13) des Zahnrad-Übersetzungsgetriebes (12) kämmt.

Gate valve with separate control piston for a length-adjustable connecting rod

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (1) für einen Kolbenmotor, wobei die Pleuelstange (1) eine hydraulische Steuereinrichtung (21) zum Einstellen der Wirklänge der längenverstellbaren Pleuelstange (1) aufweist. Die Steuereinrichtung (21) weist ein hydraulisches Steuerventil (34) mit einem Steuerzylinder (36), einem Steuerschieber (35) und mindestens einem vom Steuerschieber (35) betätigbares Ablassventil (41, 42) auf, wobei der Steuerschieber (35) einen in dem Steuerzylinder (36) verschiebbar geführten, mit einem hydraulischen Steuerdruck beaufschlagbaren Steuerkolben (37) und einen Schieberstößel (39) umfasst. Dabei sind Steuerkolben (37) und Schieberstößel (39) als separate Bauteile ausgeführt und der Schieberstößel (39) mit einer Kolbenaufnahme (58) ausgebildet, wobei der Steuerkolben (37) in einer Spielpassung auf der Kolbenaufnahme (58) des Schieberstößels (39) angeordnet ist. Darüber hinaus betrifft die Erfindung einen solchen Steuerschieber (35 ...

Längenverstellbare Pleuelstange mit hydraulischer Steuereinrichtung

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (1) für einen Kolbenmotor, wobei die Pleuelstange (1) ein erstes Pleuelauge (7) zur Aufnahme eines Kolbenbolzens und ein zweites Pleuelauge (4) zur Aufnahme eines Kurbelwellenzapfens aufweist, wobei der Abstand zwischen dem Kolbenbolzen und dem Kurbelwellenzapfen in Längsrichtung (A) der Pleuelstange (1) mittels einer hydraulischen Steuereinrichtung (21) mit hydraulischem Steuerventil (34) einstellbar ist. Die hydraulische Steuereinrichtung (21) weist einen Steuerzylinder (36), einen in dem Steuerzylinder (36) verschiebbar geführten, mit Druck beaufschlagbaren Steuerschieber (35) und mindestens ein vom Steuerschieber (35) betätigbares Ablassventil (41, 42) auf, das mit einem überdrucklosen Abflusskanal (32, 33) verbunden ist, um ausströmendes Hydraulikmittel an die Umgebung abzugeben. Darüber hinaus betrifft die Erfindung die Verwendung einer derartigen längenverstellbaren Pleuelstange (1) mit einer hydraulischen Steuereinrichtung ...

Längenverstellbare Pleuelstange mit Wölbung

Die Erfindung betrifft eine längenverstellbare Pleuelstange (10) für eine Hubkolbenmaschine, insbesondere für eine Hubkolbenbrennkraftmaschine, aufweisend ein erstes Pleuelteil (11) und ein zweites Pleuelteil (12), wobei die beiden Pleuelteile (11, 12), insbesondere teleskopisch, zu- und/oder ineinander bewegbar ausgebildet sind, der zweite Pleuelteil (12) an seinem dem ersten Pleuelteil (11) zugewandten Ende einen Führungszylinder (15) aufweist und der erste Pleuelteil (11) ein im Führungszylinder (15) verschiebbares Kolbenelement (20) aufweist, wobei in einem Bereich einer Kraftübertragung von dem ersten Pleuelteil (11) zu dem zweiten Pleuelteil (12) wenigstens eine Kraftübertragungsfläche (17, 117) und wenigstens eine Bodenfläche (18, 118) in einer Weise angeordnet sind, dass wenigstens ein Teil eines Kraftflusses von dem ersten Pleuelteil (11) auf den zweiten Pleuelteil (12) über eine formschlüssige Verbindung zwischen der Kraftübertragungsfläche (17, 117) und der Bodenfläche (18, 118 ...

System und Verfahren zum Einstellen einer wirksamen Länge einer Pleuelstange mittels Schmiermittelversorgung

Die vorliegende Erfindung betrifft ein System (100) und ein Verfahren (110) zum Einstellen einer wirksamen Länge einer längenverstellbaren Pleuelstange (1) für eine Brennkraftmaschine sowie eine Brennkraftmaschine mit einer längenverstellbaren Pleuelstange (1) und einem solchen System (100). Die Pleuelstange (1) weist zumindest einen ersten Pleuelteil (4) und einen zweiten Pleuelteil (5) auf, die mittels einer Längenverstelleinrichtung (16) in Richtung einer Längsachse (1a) der Pleuelteile (4, 5) zu- und/oder ineinander verschiebbar sind. Dabei ist eine Schmiermittelversorgungsanordnung (101), über welche zumindest ein Kurbelwellenlager (K) und/oder Kurbelzapfenlager (3c) der Brennkraftmaschine mit einem Schmiermittel beschickbar ist, und eine Hydraulikzuleitung (13), über welche die Längenverstelleinrichtung (16) mit dem als Hydraulikmedium eingesetzten Schmiermittel beschickbar ist, vorgesehen. Zudem ist eine Versorgungseinrichtung (37) vorgesehen, die ausgangsseitig sowohl mit der Schmiermittelversorgungsanordnung ...

Lengthwise adjustable connecting rod with multi-part control slide

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (1) für einen Kolbenmotor, wobei die Pleuelstange (1) eine hydraulische Steuereinrichtung (21) zum Einstellen der Wirklänge der längenverstellbaren Pleuelstange (1) aufweist und die hydraulische Steuereinrichtung (21) ein hydraulisches Steuerventil (34) mit einem Steuerzylinder (36), einem Steuerschieber (35) und min-destens einem vom Steuerschieber (35) betätigbaren Ablassventil (41, 42) aufweist, wobei der Steuerschieber (35) einen in dem Steuerzylinder (36) verschiebbar geführten, mit einem hydraulischen Steuerdruck beaufschlagbaren Steuerkolben (37) und einen Schieberstößel (39) umfasst, wobei der Steuerschieber (35) zwei separat fertigbare und bei bestimmungsgemäßer Verwendung des Steuerschiebers (35) fest zusammengefügte Steuerschieberteile (35a, 35b) aufweist, wobei ein erster Steuerschieberteil (35a) den Steuerkolben (37) und einen ersten Schieberstößelabschnitt (39a) umfasst und ein zweiter Steuerschieberteil ...

Longitudinally adjustable connecting rod with a cylinder-piston unit with anti-rotation feature

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (6.1) für einen Verbren- nungsmotor, mit einem ersten Pleuelteil (18.1), einem zweiten Pleuelteil (19.1) und mindestens einer Zylinder-Kolben-Einheit (20.1), um das erste Pleuelteil (18.1) relativ zum zweiten Pleuelteil (19.1) zu verstellen. Die Zylinder-Kolben-Einheit (20.1) umfasst ein Gehäuse mit einer Zylinder- bohrung (22.1), einen in der Zylinderbohrung (22.1) längs bewegbar angeordneten Verstellkolben (21.1) und mindestens einen in der Zylinderbohrung (22.1) vorgesehenen Druckraum sowie eine Verdrehsicherung (33.1). Die Verdrehsicherung (33.1) zur Festlegung der Drehwinkellage des Kolbenbolzens (10.1) zum Kurbelwellenzapfen (7.1) ist am ersten Pleuelteil (18.1) angeordnet und erstreckt sich mit mindestens einem Sicherungsarm (35.1) in Längsrichtung entlang einer Führung am zweiten Pleuelteil (19.1). Weiter betrifft die Erfindung einen Verbrennungsmotor (1) mit einer solchen längenverstellbaren Pleuelstange (6.1 ...

Längenverstellbare Pleuelstange mit mehrteiligem Steuerschieber

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (1) für einen Kolbenmotor, wobei die Pleuelstange (1) eine hydraulische Steuereinrichtung (21) zum Einstellen der Wirklänge der längenverstellbaren Pleuelstange (1) aufweist und die hydraulische Steuereinrichtung (21) ein hydraulisches Steuerventil (34) mit einem Steuerzylinder (36), einem Steuerschieber (35) und mindestens einem vom Steuerschieber (35) betätigbaren Ablassventil (41, 42) aufweist, wobei der Steuerschieber (35) einen in dem Steuerzylinder (36) verschiebbar geführten, mit einem hydraulischen Steuerdruck beaufschlagbaren Steuerkolben (37) und einen Schieberstößel (39) umfasst, wobei der Steuerschieber (35) zwei separat fertigbare und bei bestimmungsgemäßer Verwendung des Steuerschiebers (35) fest zusammengefügte Steuerschieberteile (35a, 35b) aufweist, wobei ein erster Steuerschieberteil (35a) den stirnseitig angeordneten Steuerkolben (37) gefolgt von einem ersten Schieberstößelabschnitt (39a) umfasst ...

A hydraulic control valve for a length adjustable connecting rod with an end control piston

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (1) für einen Kolbenmotor, wobei die Pleuelstange (1) ein erstes Pleuelauge (7) zur Aufnahme eines Kolbenbolzens und ein zweites Pleuelauge (4) zur Aufnahme eines Kurbelwellenzapfens aufweist, wobei der Abstand zwischen dem Kolbenbolzen und dem Kurbelwellenzapfen in Längsrichtung (A) der Pleuelstange (1) mittels einer hydraulischen Steuereinrichtung (21) mit hydraulischem Steuerventil (34) einstellbar ist. Das hydraulische Steuerventil (34) weist einen Steuerzylinder (36) und einen in dem Steuerzylinder (36) verschiebbar geführten, mit Druck beaufschlagbaren Steuerschieber (35) und mindestens ein vom Steuerschieber (35) betätigbares Ablassventil (41, 42) auf. Dabei weist der Steuerschieber (35) einen stirnseitig angeordneten Steuerkolben (37) mit einer dem hydraulischen Steuerdruck aussetzbaren Steuerdruckfläche (46), die einen Steuerdruckraum (38) im Steuerzylinder (36) begrenzt, und einen Schieberstößel (39) auf, ...

System and method for adjusting an effective length of a connecting rod and internal combustion engine

Die vorliegende Erfindung betrifft ein ein Verfahren zum Einstellen einer wirksamen Länge einer längenverstellbaren Pleuelstange (1) für eine Brennkraftmaschine, insbesondere Hubkolbenmaschine, sowie eine Brennkraftmaschine mit einer solchen längenverstellbaren Pleuelstange (1). Die Pleuelstange (1) weist einen ersten Pleuelteil (4) und einen zweiten Pleuelteil (5) auf, wobei die beiden Pleuelteile (4, 5) mittels einer Längenverstelleinrichtung (16) in Richtung einer Längsachse (1a) der Pleuelteile (4, 5) zuund/ oder ineinander verschiebbar sind. Der erste Pleuelteil (4) und der zweite Pleuelteil (5) bilden eine erste Hydraulikkammer (9), die in einer ersten Schaltstellung der Pleuelstange (1) mit einem Hydraulikmedium befüllt ist, und eine zweite Hydraulikkammer (10), die in einer zweiten Schaltstellung mit dem Hydraulikmedium befüllt ist. Dabei ist die Längenverstelleinrichtung (16) über wenigstens eine Hydraulikzuleitung (13) mit einem Hydraulikmedium beschickbar. Eine Pumpe (35) ist ...

Connecting rod with eccentric

Die Erfindung betrifft eine Vorrichtung zur Verstellung der effektiven Länge einer Pleuelstange (6.1) für einen Verbrennungsmotor umfassend eine Pleuelstange (6.1) mit einem ersten Pleu- elauge (9.1) zur Aufnahme eines Kolbenbolzens (10.1) und einem zweiten Pleuelauge (8.1) zur Aufnahme eines Kurbelwellenzapfen (7.1), eine in einem der Pleuelaugen drehbar angeordnete Exzenterscheibe (17.1) und einen Verriegelungsmechanismus zur Verriegelung der Exzenter- scheibe (17.1) in dem Pleuelauge (9.1) in mindestens zwei unterschiedlichen Verdrehstellungen mit mindestens zwei Sperrkonturen (21.1, 22.1) und Sperrelementen (23.1, 24.1), wobei entweder Sperrkonturen (21.1, 22.1) oder Sperrelemente (23.1, 24.1) in radialer Richtung in der Ex- zenterscheibe (17.1) angeordnet sind und Sperrelemente (23.1, 24.1) bzw. Sperrkonturen (21.1, 22.1) in der Pleuelstange (6.1) angeordnet sind und jeder Sperrkontur (21.1, 22.1) ein Sperrelement (23.1, 24.1) zugeordnet ist. Um eine solche Vorrichtung bereitzustellen ...

Adjustable length connecting rod with two telescopic connecting rod portions

Die Erfindung betrifft ein längenverstellbares Pleuel (1) mit zwei teleskopierbaren Pleuelab- schnitten (2, 3). Ein Pleuelabschnitt (2) weist einen Zylinder auf, in den der Kolben (8) des anderen Pleuelabschnittes (3) eingreift. Der Zylinder ist durch einen Deckel verschlossen, durch den sich hindurch die Kolbenstange (11) des einen Pleuelabschnittes (3) hindurch er- streckt. Die Erfindung sieht vor, dass der Pleuelabschnitt (3 mit dem Kolben (8) einstückig hergestellt und anschließend gebrochen wird, um den Deckel des Zylinders auffädeln zu kön- nen. Im Anschluss wird die Kolbenstange (11) stoffschlüssig wieder zusammengefügt, bei- spielsweise durch Elektronenstrahlschweißen.

Kompakter hydraulischer Ventilmechanismus für eine längenverstellbare Pleuelstange

Die vorliegende Erfindung betrifft einen hydraulischen Ventilmechanismus (1; 1‘) zum Öffnen und Schließen einer zu einer Druckkammer führenden Hydraulikleitung, insbesondere einer zu einer Hochdruckkammer (31, 32) einer längenverstellbaren Pleuelstange führenden Hydraulikleitung (35, 36), mit einem Zulaufventil (2, 2‘) und einem Ablassventil (3, 3‘). Es ist die Aufgabe der vorliegenden Erfindung, einen hydraulischen Ventilmechanismus bereitzustellen, der die Stabilität der aus dem Stand der Technik bekannten längenverstellbaren Pleuelstangen erhöht. Hierzu ist erfindungsgemäß vorgesehen, dass das Zulaufventil (2, 2‘) und das Ablassventil (3, 3‘) in einer gemeinsamen Gehäuseeinheit (4) angeordnet sind und die Gehäuseeinheit (4) in die Hydraulikleitung (35, 36) einsetzbar ausgestaltet ist.

System and method for adjusting an effective length of a connecting rod and internal combustion engine

Die vorliegende Erfindung betrifft ein Verfahren zum Einstellen einer wirksamen Länge einer längenverstellbaren Pleuelstange (1) für eine Brennkraftmaschine, insbesondere Hubkolbenmaschine, sowie eine Brennkraftmaschine mit einer solchen längenverstellbaren Pleuelstange. Ein erster Pleuelteil (4) und ein zweiter Pleuelteil (5) der Pleuelstange (1) sind mittels einer Längenverstelleinrichtung (16) in Richtung einer Längsachse (1a) der Pleuelteile (4, 5) zu- und/oder ineinander verschiebbar. Der erste Pleuelteil(4) und zweite Pleuelteil (5) bilden eine erste Hydraulikkammer (9), die in einer ersten Schaltstellung der Pleuelstange (1) mit einem Hydraulikmedium befüllt ist, und eine zweite Hydraulikkammer (10), die in einer zweiten Schaltstellung mit dem Hydraulikmedium befüllt ist. Dabei ist die Längenverstelleinrichtung (16) über wenigstens eine Hydraulikzuleitung (13) mit einem Hydraulikmedium beschickbar. Eine Pumpe (35) ist dabei dazu eingerichtet, das Hydraulikmedium in der Hydraulikzuleitung ...

Longitudinally adjustable connecting rod with a cylinder-piston unit with anti-rotation feature

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (6.1) für einen Verbrennungsmotor, mit einem ersten Pleuelteil (18.1), einem zweiten Pleuelteil (19.1) und mindestens einer Zylinder-Kolben-Einheit (20.1), um das erste Pleuelteil (18.1) relativ zum zweiten Pleuelteil (19.1) zu verstellen. Die Zylinder-Kolben-Einheit (20.1) umfasst im zweiten Pleuelteil (19.1) ein Gehäuse mit einer Zylinderbohrung (22.1) und einen in der Zylinderbohrung (22.1) längs bewegbar angeordneten, mit einer Kolbenstange (18a.1) am unteren Ende des ersten Pleuelteils (18.1) verbundenen Verstellkolben (21.1) und mindestens einen in der Zylinderbohrung (22.1) vorgesehenen Druckraum sowie eine Verdrehsicherung (33.1). Die Verdrehsicherung (33.1) zur Festlegung der Drehwinkellage des Kolbenbolzens (10.1) zum Kurbelwellenzapfen (7.1) ist am ersten Pleuelteil (18.1) angeordnet und erstreckt sich mit mindestens einem Sicherungsarm (35.1) in Längsrichtung entlang einer Führung am zweiten Pleuelteil ( ...

Connecting rod with positive connection

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (1) mit zwei telesko-pierbaren Pleuelabschnitten (2, 3), wobei mindestens ein Pleuelabschnitt (3) einen Verstellkolben (9) und ein Pleuelauge (7) aufweist und Verstellkolben (9) und Pleuelauge (7) über eine Kolbenstange (8) miteinander verbunden sind. Es ist die Aufgabe der vorliegenden Erfindung, die Konstruktion, Herstellung und Funktion des Pleuelabschnitts (3) einer gattungsgemäßen längenverstellbaren Pleuelstange (1) zu verbessern. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass der Verstellkolben (9) und die Kolbenstange (8) jeweils mindestens ein Verriegelungselement (35.1, 35.2, 36) aufweisen, das mindestens eine Verriegelungselement (35.1, 35.2) des Verstellkolbens (9) und das mindestens eine Verriegelungselement (36) der Kolbenstange (8) formschlüssig ineinandergreifen und mindestens ein Arretierungselement (38) die Verriegelungselemente (35.1, 35.2, 36) ineinander arretiert.

Adjustable length connecting rod with two telescopic connecting rod portions

Die Erfindung betrifft ein längenverstellbares Pleuel (1) mit zwei teleskopierbaren Pleuelabschnitten (2, 3). Ein Pleuelabschnitt (2) weist einen Zylinder auf, in den der Kolben (8) des anderen Pleuelabschnittes (3) eingreift. Der Zylinder ist durch einen Deckel verschlossen, durch den sich hindurch die Kolbenstange (11) des einen Pleuelabschnittes (3) hindurch erstreckt. Die Erfindung sieht vor, dass der Pleuelabschnitt (3) mit dem Kolben (8) einstückig hergestellt und anschließend gebrochen und/oder gecrackt wird, um den Deckel des Zylinders auffädeln zu können. Im Anschluss wird die Kolbenstange (11) stoffschlüssig wieder zusammengefügt, beispielsweise durch Elektronenstrahlschweißen.

Adjustable length connecting rod, reciprocating piston engine and vehicle

Die Erfindung betrifft ein längenverstellbares Pleuel(1) für eine Hubkolbenmaschine, eine Hubkolbenmaschine und ein Fahrzeug, wobei das Pleuel (1) einen ersten Pleuelteil (2) mit einem großen Pleuelauge (3) und einen zweiten Pleuelteil (4) mit einem kleinen Pleuelauge (5) aufweist und eine wirksame Pleuellänge (L) des Pleuels veränderbar ist und das Pleuel eine hydraulische Längenverstelleinrichtung aufweist, die einen hydraulischen Arbeitsraum, einen Hydraulikkanal (11B) eine Ventilausnehmung mit einer Ventilausnehmungs-Längsachse (L2), und eine in der Ventilausnehmung angeordnete Ventileinrichtung (14B) mit einem Ventilraum (31B) aufweist, wobei die Ventileinrichtung (14B) zum Öffnen und/oder Sperren eines Hydraulikmediumabflusses aus dem hydraulischen Arbeitsraum ausgebildet ist, und wobei der Hydraulikkanal (11B) an einer Einmündungsöffnung in einem Innenwandabschnitt (27B) der Ventilausnehmung in die Ventilausnehmung einmündet. Dabei weist die Ventileinrichtung (14B) wenigstens einen ...

Hydraulischer Ventilmechanismus für längenverstellbare Pleuelstange

Die vorliegende Erfindung betrifft einen hydraulischen Ventilmechanismus (1) zum Öffnen und Schließen einer zu einer Druckkammer (28, 29) führenden Hydraulikleitung (3), insbesondere für eine längenverstellbare Pleuelstange (20), mit einem Rückschlagventil (4) und einem Drosselventil (5). Es ist die Aufgabe der vorliegenden Erfindung, einen hydraulischen Ventilmechanismus (1) bereitzustellen, der die aus dem Stand der Technik bekannten Nachteile vermeidet und insbesondere die Stabilität der aus dem Stand der Technik bekannten längenverstellbaren Pleuelstange (20) erhöht. Hierzu ist erfindungsgemäß vorgesehen, dass das Rückschlagventil (4) und das Drosselventil (5) in Reihe geschaltet sind und optional in einer gemeinsamen Gehäuseeinheit (6) angeordnet sind. Ferner betrifft die Erfindung auch eine Pleuelstange (20) mit mindestens einem erfindungsgemäßen hydraulischen Ventilmechanismus (1) und einen Verbrennungsmotor mit mindestens einer solchen Pleuelstange (20).

CONSTRUCTION TO THE VARIABLE ADJUSTMENT OF THE PISTON ROD LENGTH AS WELL AS THE VARIABLE ADJUSTMENT OF THE CRANKSHAFT CHEEK LEVER OF A LIFTING CYLINDER ENGINE

MULTI-CYLINDER INTERNAL COMBUSTION ENGINE

Die Erfindung betrifft eine Mehrzylinder-Brennkraftmaschine (1) mit zumindest einem ersten Zylinder (2) oder einer Gruppe von ersten Zylindern (2) und zumindest einem zweiten Zylinder (3) oder einer Gruppe von zweiten Zylindern (3), wobei der zumindest eine erste Zylinder (2) bzw. die Gruppe von ersten Zylindern (2) mittels zumindest einer Zylinderabschalteinrichtung (4) deaktivierbar ist, und wobei ein Verdichtungsverhältnis zumindest eines Zylinders mittels zumindest einer Verdichtungsänderungseinrichtung (5) veränderbar ist. Um einen wirkungsgradoptimalen Betrieb der Brennkraftmaschine auf möglichst einfache Weise zu ermöglichen, ist vorgesehen, dass das Verdichtungsverhältnis des bzw. der ersten Zylinder (2) unveränderbar und das Verdichtungsverhältnis des bzw. der zweiten Zylinder (3) veränderbar ist.

BRENNKRAFTMASCHINE MIT EINEM ZYLINDERBLOCK

Die Erfindung betrifft eine Brennkraftmaschine (1) mit einem Zylinderblock (2) zur Aufnahme mindestens eines Zylinders (3) mit einem hin- und hergehenden Kolben (4), welcher über eine Pleuelstange (5) auf eine Kurbelwelle (6) einwirkt, mit einer eine verstellbare Kurbelwellenaufnahme (7) aufweisenden Vorrichtung (8) zur Veränderung eines durch den Abstand (a) zwischen einer Drehachse (6a) der Kurbelwelle (6) und einer durch eine Kolbenlängsachse verlaufenden Motorlängsebene (1a) definierten Kurbelwellenversatzes, wobei die Kurbelwellenaufnahme (7) samt Kurbelwelle (6) entlang zumindest einer zylinderblockfesten - vorzugsweise zylindrischen - Bahnfläche (14, 15) verschiebbar ist. Um eine Veränderung des Kurbelwellenversatzes zu ermöglichen, ohne die Geräuschentwicklung und den Verschleiß nachteilig zu beeinflussen ist vorgesehen, dass die Vorrichtung (8) zumindest eine Spanneinrichtung (20) aufweist, um die Kurbelwellenaufnahme (7) gegen die Bahnfläche (14, 15) zu pressen.

LÄNGENVERSTELLBARE PLEUELSTANGE

Die Erfindung betrifft eine längenverstellbare Pleuelstange (1) für eine Hubkolbenmaschine, insbesondere für eine Brennkraftmaschine, mit zumindest einem ersten Stangenteil (2) und einem zweiten Stangenteil (4), welche beiden Stangenteile (2, 4) relativ zueinander über ein Schraubgetriebe (6) in Richtung der Längsachse (1a) der Pleuelstange (1) verschiebbar sind, wobei das Schraubgetriebe (6) zumindest einen ersten Getriebeteil (7) und einen mit dem ersten Getriebeteil (7) im Eingriff stehenden zweiten Getriebeteil (8) aufweist, wobei der erste Getriebeteil (7) als Spindelmutter (9) bzw. Gewindespindel (10) und der zweite Getriebeteil (8) als Gewindespindel (10) bzw. als Spindelmutter (9) ausgebildet ist. Auf möglichst einfache Weise eine Veränderung des Verdichtungsverhältnisses bei einer Hubkolbenmaschine zu ermöglichen, ist vorgesehen, dass das Schraubgetriebe (6) über zumindest einen mindestens ein Schwingelement (21) aufweisenden Aktuator (20) betätigbar ist, wobei das Schwingelement ...

BRENNKRAFTMASCHINE MIT EINEM ZYLINDERBLOCK

Die Erfindung betrifft eine Brennkraftmaschine (1) mit einem Zylinderblock (2) zur Aufnahme mindestens eines Zylinders (3) mit einem hin- und hergehenden Kolben (4), welcher über eine Pleuelstange (5) auf eine Kurbelwelle (6) einwirkt, mit einer eine verstellbare Kurbelwellenaufnahme (7) aufweisenden Vorrichtung (8) zur Veränderung eines durch den Abstand (a) zwischen einer Drehachse (6a) der Kurbelwelle (6) und einer durch eine Kolbenlängsachse verlaufenden Motorlängsebene (1a) definierten Kurbelwellenversatzes, wobei die Kurbelwellenaufnahme (7) samt Kurbelwelle (6) entlang zumindest einer zylinderblockfesten - vorzugsweise zylindrischen - Bahnfläche (14, 15) verschiebbar ist. Um eine Veränderung des Kurbelwellenversatzes zu ermöglichen, ohne die Geräuschentwicklung und den Verschleiß nachteilig zu beeinflussen ist vorgesehen, dass die Vorrichtung (8) zumindest eine Spanneinrichtung (20) aufweist, um die Kurbelwellenaufnahme (7) gegen die Bahnfläche (14, 15) zu pressen.

LÄNGENVERSTELLBARE PLEUELSTANGE

Die Erfindung betrifft eine längenverstellbare Pleuelstange (1) für eine Hubkolbenmaschine, insbesondere für eine Brennkraftmaschine, mit zumindest einem ersten Stangenteil (2) und einem zweiten Stangenteil (4), welche beiden Stangenteile (2, 4) relativ zueinander über ein Schraubgetriebe (6) in Richtung der Längsachse (1a) der Pleuelstange (1) verschiebbar sind, wobei das Schraubgetriebe (6) zumindest einen ersten Getriebeteil (7) und einen mit dem ersten Getriebeteil (7) im Eingriff stehenden zweiten Getriebeteil (8) aufweist, wobei der erste Getriebeteil (7) als Spindelmutter (9) bzw. Gewindespindel (10) und der zweite Getriebeteil (8) als Gewindespindel (10) bzw. als Spindelmutter (9) ausgebildet ist. Um auf möglichst einfache Weise eine Veränderung des Verdichtungsverhältnisses bei einer Hubkolbenmaschine zu ermöglichen ist vorgesehen, dass das Schraubgetriebe (6) über zumindest einen hydraulischen Aktuator (11) betätigbar ist, wobei der hydraulische Aktuator (11) in der Pleuelstange ...

RECIPROCATING PISTON ENGINE, ESPECIALLY AN INTERNAL COMBUSTION ENGINE

Die Erfindung betrifft eine Hubkolbenmaschine mit einer Kurbelwelle (19) mit zumindest einer längenverstellbaren Pleuelstange (1) mit zumindest einem ersten Stangenteil (2) und einem zweiten Stangenteil (4), welche beiden Stangenteile (2, 4) relativ zueinander in Richtung der Längsachse (1a) der Pleuelstange (1) verschiebbar und über ein Schraubgetriebe (6) miteinander verbunden sind, wobei das Schraubgetriebe (6) zumindest eine Schraubgetriebeeinheit (6a, 6b) mit einem ersten Getriebeteil (7a, 7b) und einem mit dem ersten Getriebeteil (7a, 7b) im Gewindeeingriff stehenden achsgleichen zweiten Getriebeteil (8a, 8b) aufweist, wobei erster (7a, 7b) und zweiter Getriebeteil (8a, 8b) koaxial bezüglich einer gemeinsamen parallel zur Längsachse (1a) der Pleuelstange (1) angeordneten Schraubachse (11a, 11b) ausgebildet sind, wobei das Schraubgetriebe (6) nicht selbsthemmend ausgebildet ist, und wobei ein erster Getriebeteil (7a, 7b) mit zumindest einer mittels zumindest einer Schalteinrichtung ...

Valve for internal combustion engine

Brennkraftmaschine (1), insbesondere mit variablem Verdichtungsverhältnis, mit zumindest einer Kurbelwelle (2), die mit zumindest einer Pleuelstange (3) schwenkbar verbunden ist, wobei die Kurbelwelle (2) einen ersten Ölkanal (4) und die Pleuelstange (3) einen mit dem ersten Ölkanal (4) strömungsverbundenen zweiten Ölkanal (5) aufweist und in einem der Ölkanäle (4, 5) zur Veränderung eines Durchflussquerschnittes (16, 17) zumindest ein Ventil (10) angeordnet ist, das einen Ventilkörper (14) aufweist, der zwischen einer ersten Endstellung (a) und einer zweiten Endstellung (b) in einer Ventilbohrung (15) entlang oder um eine Ventilachse (11) im Wesentlichen kontinuierlich verschiebbar ist, wobei der ersten Endstellung (a) ein erster Durchflussquerschnitt (16) und der zweiten Endstellung (b) ein zweiter Durchflussquerschnitt (17) zugeordnet ist. Aufgabe der vorliegenden Erfindung ist es eine Möglichkeit anzugeben, die Ölzufuhr bei steigender Drehzahl zu vermindern. Gelöst wird das erfindungsgemäß ...

Längenverstellbare Pleuelstange mit Dichtungseinrichtung

Die vorliegende Erfindung betrifft eine längenverstellbare Pleuelstange (1) für einen Verbrennungsmotor mit einer Längenverstelleinrichtung zum Verstellen einer Wirklänge der Pleuelstange (1), wobei die Längenverstelleinrichtung einen Teleskopmechanismus (20) mit einer Zylinder-Kolben-Einheit aufweist und die Zylinder-Kolben- Einheit Bauteile (8, 9, 10, 11) umfasst, die mindestens eine Druckkammer (13, 14) ausbilden und die mindestens eine Druckkammer (13, 14) mit mindestens einer Dichtungseinrichtung (12, 15, 16) abgedichtet ist. Es ist die Aufgabe der vorliegenden Erfindung, eine Dichtungseinrichtung (12, 15, 16) und ein Verfahren zum Herstellen dieser Dichtungseinrichtung (12, 15, 16) bereitzustellen, das die Montage vereinfacht und mit dem eine höhere Festigkeit der Pleuelstange (1) erzielt werden kann. Hierzu ist erfindungsgemäß vorgesehen, dass die mindestens eine Dichtungseinrichtung (12, 15, 16) an eines der die mindestens eine Druckkammer (13, 14) ausbildenden Bauteile (8, 9, 10 ...

MECHANICAL TRANSMISSION DEVICE FOR ENGINES WITH VARIABLE CAPACITY

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

INTERNAL-COMBUSTION ENGINE WITH ROTARY ZYLINDERVENTIL

Internal combusion engines compression reciprocating engine

VARIABLE STROKE ENGINE

A variable stroke engine includes: a connecting rod connected at one end to a piston through a piston pin; a subsidiary arm turnably connected at one end to the other end of the connecting rod and connected to a crankshaft through a crankpin; and a control rod connected at one end to the subsidiary arm at a position displaced from a connection position of the connecting rod; a support position of the other end of the control rod being capable of being displaced in a plane perpendicular to an axis of the crankshaft. In the variable stroke engine, a switchover means switches over: a state in which a high expansion stroke is provided such that the stroke of the piston in an expansion stroke is larger than that in a compression stroke when an engine load is high; and a state in which a constant compression ratio is provided when the engine load is low. Thus, a reduction in fuel consumption is achieved irrespective of the level of an engine load, while putting a high value on a reduction in ...

ENGINE WITH VARIABLE COMPRESSION RATIO

An engine with a variable compression ratio includes a connecting rod connected to a piston, a first arm turnably connected to the connecting rod and to a crankshaft through a crankpin, a second arm integrally connected to the first arm, a control rod turnably connected to the second arm, and a displaceable support shaft for supporting the other end of the control rod for turning movement. In the engine, a displacement Vhpiv0 and a compression ratio .epsilon.piv0 at the time when the support shaft is in any first position and a displacement Vhpiv1 and a compression ratio .epsilon.piv1 at the time when the support shaft is in a second position displaced from the first position are determined, and a relation, Vhpiv1 > Vhpiv0 is satisfied when .epsilon.piv1 < spiv0, and a relation, Vhpiv1 < Vhpiv0 is satisfied when .epsilon.piv1 > spiv0.

CONTROL METHOD FOR INTERNAL CONBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

In the present invention, because a variable compression ratio mechanism (5) is a multi-link piston crank mechanism configured with multiple links for linking a piston 4 with a crankshaft (6), a combustion load acts so as to push the piston (4) downward. Therefore, response speed is faster when changing the compression ratio to a low compression ratio side than when changing the compression ratio to a high compression ratio side. Thus, response speed of the change to the low compression ratio side is set faster than response speed of the change to the high compression ratio side. Consequently, the change to the low compression ratio side can be achieved at a faster response speed than to the high compression ratio side without conforming to the response speed of the high compression ratio side such that deterioration of responsiveness can be suppressed.

DISPLAY DEVICE

A display device is provided for an internal combustion engine including a variable compression ratio mechanism structured to vary an engine compression ratio of the internal combustion engine. The display device includes an indicator section structured to vary its indication depending on the engine compression ratio. The indicator section is configured to maintain the indication constant or within a slight change with respect to a change in the engine compression ratio within each of at least one of first and second dead zones of the engine compression ratio, wherein the first dead zone includes a vicinity of an upper limit of the engine compression ratio including the upper limit, and wherein the second dead zone includes a vicinity of a lower limit of the engine compression ratio including the lower limit.

VARIABLE COMPRESSION RATIO ENGINE

A system and method for providing a variable compression ratio internal combustion engine is disclosed. The system can include a crankshaft pivotally coupled to a standard engine block using a plurality of pivoting main bearing caps. The system can pivot the main bearing caps, and thus the crankshaft, to increase or decrease the compression ratio of the engine. The system can also include a plurality of actuators to move one end of the main bearing caps. The crankshaft can comprise one or more flexible joints to enable the crankshaft to move, while the output(s) of the crankshaft remain stationary to enable conventional sealing and power take-off. The compression ratio can be varied continuously during use and can be included in an overall engine management system.

R-.THETA. TABLE DEVICE, INTERNAL-THREAD PROCESSING DEVICE, AND VARIABLE CRANK DEVICE

Provided is an R-? table device wherein a table can be moved in a plane in longitudinal, lateral, and rotational directions. The present invention is provided with: a table furnished with a through hole equipped with a bearing; a guide member for holding the table so that the table can move horizontally; a driving device equipped with a working shaft inserted through the bearing at an incline, the driving device driving the working shaft so as to allow the working shaft to rotate and stop; a lifting platform for lifting and lowering the driving device; a lifting device for lifting and lowering the lifting platform and changing the position of a working point at which the working shaft and the bearing engage with each other; and a base provided with a guide member and a post for guiding the lifting platform, the lifting device being mounted on the base. The lifting platform is lifted/lowered to change the horizontal distance between the load center and the center line of the main axis of ...

DEVICE FOR DIRECTLY MEASURING ON A PISTON THE EFFECTIVE VOLUMETRIC RATIO OF A VARIABLE COMPRESSION RATIO ENGINE

Le dispositif permettant de mesurer le rapport volumétrique effectif d'au moins un cylindre d'un moteur à taux de compression variable comprend au moins un capteur de passage de cible (91) fixé sur le carter cylindre (100) qui détecte le passage d'au moins une cible (92) solidaire du piston (2) dudit moteur, ledit capteur de passage de cible (91) coopérant avec au moins un capteur de position angulaire de vilebrequin (93) dudit moteur, et un calculateur (94).

Moteur à combustion à course variable.

Endothermic motor to variable jam.

Un motore endotermico (100) a compressione variabile comprendente: almeno un pistone (10), un albero motore (20) girevole lungo un asse di rotazione (X) e comprendente almeno una manovella (21), una biella (30) incernierata in una porzione di testa (31) ad una rispettiva manovella (21) e in una porzione di piede (32) ad un perno (11) del pistone (10), un sistema di regolazione (40) della compressione di una camera di combustione (101) del motore (100) configurato per aumentare un valore di compressione nella camera di combustione (101) o ridurre il valore di compressione nella camera di combustione (101). Il sistema di regolazione (40) comprende un corpo eccentrico (41) girevole e configurato in modo da variare il rapporto in lunghezza tra la biella (30) e la manovella (21) dell’albero motore (20) per ridurre o aumentare la corsa (C) del pistone (10) in accordo con una posizione di rotazione (R) dell’albero motore (20).

Process for operation of the piston internal combustion engine with mixed heat admission and piston internal combustion engine with mixed heat admission

Способ работы поршневого двигателя внутреннего сгорания со смешанным подводом тепла и поршневой двигатель внутреннего сгорания со смешанным подводом тепла (варианты)

Изобретение относится к двигателестроению, в частности к способу работы поршневого двигателя внутреннего сгорания (ДВС) со смешанным подводом тепла и воспламенением от сжатия или от внешнего источника, и к конструкции такого двигателя. Способ предусматривает подачу путем впрыска в камеру сгорания топлива и/или топлива и рабочего тела, и/или смеси топлива и рабочего тела, температура которых выше температуры воспламенения топлива в открытом тигеле не более, чем на 400К. Поршневой двигатель внутреннего сгорания со смешанным подводом тепла содержит масляный картер, блок цилиндров с адиабатной головкой, в котором выполнены впускные и выпускные окна и/или установлены выпускные клапаны, и/или впускные и выпускные клапаны; коленвал, соединенный посредством шатуна переменной длины с поршнем; компенсатор, который сообщается с камерой сгорания и оснащен конической телескопической пружиной сжатия переменной жесткости и толкателем. ДВС также оборудован аппаратурой впрыска, включающей топливный насос ...

Двигатель внутреннего сгорания с переменной степенью сжатия

Двигатель внутреннего сгорания с переменной степенью сжатия, содержащий блок цилиндров с поршнем и пальцем; кривошипно-шатунный механизм, содержащий два коленчатых вала, выполненных с параллельными осями вращения и с возможностью вращения навстречу друг другу с одинаковой угловой скоростью, два шатуна с шарнирами в верхних и нижних головках, при этом нижние головки шатунов шарнирно связаны с шатунными шейками коленчатых валов, имеющих возможность относительного поворота при помощи механизма рассогласования, отличающийся тем, что содержит коромысло, шарнирно установленное на пальце внутри поршня с возможностью качания относительно последнего и своими концами шарнирно связанное с верхними головками шатунов. Фиг. 1 ...

Crankshaftless internal combustion engine

A crankshaftless internal combustion engine includes a power shaft unit in which a transferring path of a power system is selected depending on a deactivated state and an activated state of a cylinder and a cylinder separator separating a power system of the deactivated cylinder from the power shaft unit by control of an ECU, thereby improving fuel efficiency due to a uniform change in volume of a combustion chamber of the cylinder and increasing reduction in Nox of exhaust gas, and particularly, a plurality of cylinders are controlled in a variable cylinder scheme to further improve fuel efficiency and be optimal to even EM improvement.

NEW INTERNAL COMBUSTION ENGINE AT ALTERNATING CYCLE WITH CONTROLLED VARIABLE COMPRESSION RATIO-CVCR

The mechanic system in object uses the new structure of the crank mechanism assembly, for internal combustion engines at alternating cycle, without modifying the cycle. The system, places instead of traditional connecting rod a new system. The system allows using two coaxial pistons with the opposite head, acting in the same cylinder and has opposed combustion chambers. The system then replace the classical three elements for piston (piston, connecting rod and crankshaft), with a system that can be considered to be composed of four elements for two Pistons with an evident general kinematic savings. The salient features of the system are: 1. Reduced lateral piston friction on the cylinder; 2. Reduction of General weights of the crankshaft assembly; 3. Lack of sucking effect resulting in better efficiency; 4. The new system of transmission is composed of two parts. that allows controlling the compression ratio and NOK. The proposed system tends to maintain optimal compression ratio between the volume of air/fuel mixture, and the volume of the combustion chamber 5. The system is governed by a hydraulic circuit, the RC as determined by the program's control unit that controls the real pistons position through an electromagnetic sensors. 6. The system, wanting to get higher specific power, allow to use even the NOK, indeed on the practice experimentation it was found that the RC can significantly exceed the maximum permissible RC which fuel is used, while in a conventional engine, owing to its rigidity, when the NOK happens the piston MUST reach the TDC creating conflicting forces, that create overpressure which tend to lock the engine and compromise its integrity with pressure of more than 200 bar. In the case of the new system these pressures can be controlled keeping them in limits (120/130 bar). 8. The system (which is calculated and prearranged for each specific engine type) in addition to the compression ratio change the intake capacity of Pistons which when the ...

VARIABLE COMPRESSION RATIO SYSTEMS FOR OPPOSED-PISTON AND OTHER INTERNAL COMBUSTION ENGINES, AND RELATED METHODS OF MANUFACTURE AND USE

Various embodiments of methods and systems for varying the compression ratio in opposed-piston engines are disclosed herein. In one embodiment, an opposed-piston engine can include a first phaser operably coupled to a first crankshaft and a second phaser operably coupled to a corresponding second crankshaft. The phase angle between the crankshafts can be changed to reduce or increase the compression ratio in the corresponding combustion chamber to optimize or at least improve engine performance under a given set of operating conditions. 1. A method for varying the compression ratio in an engine having a first piston that cooperates with a second piston to define a combustion chamber therebetween , the method comprising:moving the first piston back and forth in a first cycle between a first bottom dead center (BDC) position and a first top dead center (TDC) position according to a first piston timing;moving the second piston back and forth in a second cycle between a second BDC position and a second top dead center TDC position according to a second piston timing;while moving the first piston according to the first piston timing and the second piston according to the second piston timing, periodically opening and closing at least one passage in fluid communication with the combustion chamber according to a valve timing; and changing the first piston timing relative to the valve timing; and', 'changing the second piston timing relative to the valve timing., 'while maintaining the valve timing, varying the compression ratio of the combustion chamber by'}2. The method of wherein the first piston is operably coupled to a first crankshaft and the second piston is operably coupled to a second crankshaft claim 1 , and wherein varying the compression ratio of the combustion chamber includes:changing a first phase angle of the first crankshaft relative to the valve timing; andchanging a second phase angle of the second crankshaft relative to the valve timing.3. The method of ...

COMBUSTION ENGINE WITH STEPWISE VARIABLE COMPRESSION RATIO (SVCR)

The compression ratio of an internal combustion engine is adjustable in a stepwise fashion, such as by pivoting an extension of an eccentric connecting rod bearing. The projection extends into a chamber defined by a portion of a connecting rod coupling portion of a connecting rod assembly. Liquid is delivered to one side of the projection and removed from the opposite side of the projection to move the projection and thereby the eccentric connecting rod bearing from one position corresponding to one compression ratio to another position corresponding to another compression ratio. 1. A stepwise variable compression ratio internal combustion engine comprising:a crank shaft rotatable about a crank shaft axis and comprising a connecting rod coupling portion defining a first axis;at least one piston cylinder;a piston slidably received by said at least one cylinder so as to reciprocate between top dead center and bottom dead center positions within said cylinder;the crank coupling end portion comprising an eccentric adjuster receiving chamber;a connecting rod comprising a piston coupling end portion pivotally coupled to the piston and a crank coupling end portion pivotally coupled to the connecting rod coupling portion of the crank shaft, such that rotation of the crank shaft causes the connecting rod to reciprocate and move the piston between top dead center and bottom dead center positions;a crank shaft coupler comprising an eccentric portion defining a second axis and operable to couple the connecting rod coupling portion of the crank shaft to the crank coupling end portion of the connecting rod, the eccentric portion being positioned such that pivoting of the crank shaft coupler about the first axis from one crank shaft coupler position to another crank shaft coupler position pivots the eccentric portion from a first eccentric position to a second eccentric position and shifts the second axis relative to the crank shaft axis to thereby vary the compression ratio of ...

Variable stroke assembly

There is proposed a variable stroke assembly having a primary crank, the primary crank having a primary axis of rotation; a hypocycloid gear set having at least one internal gear and at least one spur gear, the internal gear having an axis of rotation that coincides with the primary axis of rotation of the primary crank and the spur gear having a secondary axis of rotation, wherein the primary crank cooperatively engages and rotates within the internal gear about the primary axis of rotation, the spur gear pivotally mounted on the primary crank such that the secondary axis of rotation is offset from the primary axis of rotation; a secondary crank having a third axis of rotation, wherein the secondary crank cooperatively engages the spur gear such that the third axis of rotation is further offset from the primary and secondary axis of rotation; a connecting rod, with a first and second end, the first end of connecting rod is pivotally connected to the secondary crank, wherein operation the connecting rod travels in a substantially linear motion that translates into rotational motion of the secondary crank, spur gear and primary crank.

RECIPROCATING PISTON ENGINE WITH VARIABLE COMPRESSION RATIO

In a reciprocating piston engine with a variable compression ratio in which a piston is movably disposed in a cylinder, an adjustment arrangement is provided for controlling the compression ratio of the engine including an adjusting part supported by a guide element depending on a signal provided by a detection means comprising a transducer part arranged on the adjusting part and a corresponding detection part, arranged on a housing part of the engine in connection with a control unit in which a desired momentary compression ratio setting is determined on the basis of a characteristic diagram stored in the control unit. 130283641383641385028. A reciprocating engine with variable compression ratio comprising at least one cylinder , a piston () movably received in the cylinder so as to be guided in a translatory movement , an adjusting means () including an adjusting part () supported on a guide element () of the adjusting means () including an adjusting part () supported on a guide element () of the adjusting means () so as to be movable between at least two positions for adjusting a compression ratio of the cylinder , the compression ratio being determined in dependence upon at least one signal provided by at least one detection means () characterizing the positions of the adjusting means () ,{'b': 50', '70', '78', '78', '70', '36', '36', '41', '42', '78', '36', '41', '42', '78', '36', '41, 'the detection means () comprising a transducer part (), and a corresponding detection part () in the form of a detection plate () wherein the transducer part () is arranged on one of the adjusting part () and a housing of the reciprocating engine where the adjusting part () and the guide element () are supported together pivotally about a pivot axis (), the detection part () being correspondingly arranged on a housing of the reciprocating engine where the adjusting part () and the guide element () are supported together pivotally about a pivot axis (), the detection part () ...

VARIABLE COMPRESSION RATIO APPARATUS

A variable compression ratio apparatus may include a connecting rod having a small end portion having an eccentric bearing installation hole, a large end portion rotatably connected to the crank shaft, and a space portion formed in a longitudinal direction of the connecting rod and communicated with the eccentric bearing installation hole, a piston pin fixedly, an eccentric bearing rotatably engaged to the eccentric bearing installation hole and coupled to the piston pin through a pin installation hole of the eccentric bearing, wherein the piston pin may be offset from a center axis of the eccentric bearing, an eccentric link connected to the eccentric bearing, a variable link rotatably connected to the eccentric link, a control link rotatably connected to the variable link, and a control shaft provided in the control link to rotate the control link, wherein the eccentric link may be rotated within the space portion. 1. A variable compression ratio (VCR) apparatus installed in an engine rotating a crank shaft upon receiving combustion power of a mixer from a piston and changing a compression ratio of the mixer , the apparatus comprising: a small end portion having an eccentric bearing installation hole and rotatably connected to the piston through the eccentric bearing installation hole;', 'a large end portion rotatably connected to the crank shaft such that the large end portion is eccentrically rotatable with respect to the crank shaft; and', 'a space portion formed in a longitudinal direction of the connecting rod and communicated with the eccentric bearing installation hole of the small end portion;, 'a connecting rod includinga piston pin fixedly provided in the piston;an eccentric bearing rotatably engaged to the eccentric bearing installation hole of the small end portion and coupled to the piston pin through a pin installation hole of the eccentric bearing, wherein the piston pin is offset from a center axis of the eccentric bearing;an eccentric link having ...

Control system for internal combustion engine

A control system is provided with a piston TDC (top dead center) position variable mechanism and a valve operational characteristics variable mechanism. An actual distance between the valve and the piston of closest approach is calculated based on the actual operation states of these mechanisms. In addition, a limit distance of closest approach necessary to avoid interference between the valve and the piston is set, and, the piston TDC position variable mechanism and the valve operational characteristics variable mechanism are controlled to be driven to increase the actual distance.

VARIABLE COMPRESSION RATIO APPARATUS

A variable compression ratio apparatus includes: a piston defining a combustion chamber, a connecting rod connected to the piston; an eccentric link eccentrically connected to the piston, a swing link connected to the eccentric link so as to rotate the eccentric link, a crankpin to which the connecting rod is connected, and a crank web disposed at both sides of the crankpin and provided with a guide portion for guiding downward motions of the eccentric link and the swing link when the eccentric link and the swing link move downward. Thereby, the downward motions of the eccentric link and the swing link are stabilized. 1. A variable compression ratio apparatus , comprising:a piston defining a combustion chamber;a connecting rod connected to the piston;an eccentric link eccentrically connected to the piston;a swing link connected to the eccentric link so as to rotate the eccentric link;a crankpin connected to the connecting rod; anda crank web disposed at both sides of the crankpin, said crank web having a guide portion for guiding motion of the eccentric link and the swing link.2. The variable compression ratio apparatus of claim 1 , wherein:the guide portion is formed to expand in a radial direction outwardly from an exterior diameter of the crankpin.3. The variable compression ratio apparatus of claim 1 , wherein:the guide portion is formed in a circular arc shape.4. The variable compression ratio apparatus of claim 2 , wherein:the guide portion comprises an inner surface for guiding a downward motion of the swing link.5. The variable compression ratio apparatus of claim 4 , wherein:the inner surface is formed as a smooth flat surface excellent in surface roughness.6. The variable compression ratio apparatus of claim 1 , wherein:the crank web comprises a balancing portion integrally formed with the guide portion at the opposite side of the guide portion; andan inner surface of the balancing portion is formed as a smooth flat surface but with surface roughness so as ...

SUPPORTING ARRANGEMENT FOR AN ECCENTRIC MEMBER OF AN ADJUSTING ARRANGEMENT, AND ADJUSTING ARRANGEMENT

A supporting arrangement for an eccentric member () of an adjusting arrangement () of a connecting rod () of a reciprocating piston internal combustion engine having at least one piston rod () that is guided displaceably by a piston () and a seal member () is connected to the supporting piston () in a supporting cylinder () which is provided in the connecting rod () and has a longitudinal axis (). The supporting piston () enclosing at least one cylinder chamber () with the supporting cylinder (). A side () of the the supporting piston () that is directed toward the cylinder chamber () has a brake piston () that can be moved in the longitudinal axis (). The brake piston () is mounted on the supporting piston () and can be prestressed by a spring (). 1. A supporting arrangement for an eccentric member of an adjusting arrangement of a connecting rod of a reciprocating piston internal combustion engine having at least one piston rod guided displaceably by a piston and a seal that is connected to the supporting piston in a supporting cylinder that is provided in the connecting rod and has a longitudinal axis , the supporting piston enclosing at least one cylinder chamber with the supporting cylinder wherein the supporting piston has a brake piston on a side directed toward the cylinder chamber , the brake piston is mounted on the supporting piston , and is prestressed by means of prestressing means and can be moved in the longitudinal axis.2. The supporting arrangement of claim 1 , wherein the prestressing means has at least one spring member.3. The supporting arrangement of claim 2 , wherein the prestressing means is configured as a leaf spring arrangement that is supported on a wall.4. The supporting arrangement of claim 1 , wherein the brake piston has an opening arrangement configured as a nozzle.5. The supporting arrangement of claim 4 , wherein the opening arrangement is configured as a throttle opening.6. The supporting arrangement of claim 4 , wherein the opening ...

Adaptive any-fuel camless reciprocating engine

An adaptive, any-fuel reciprocating engine using sensor feedback integration of high-speed optical sensors with real-time control loops to adaptively manage the electronic actuation schemes over a range of engine loads and fuels. The engine uses one or more optical sensors to collect specific types of gas property data via a spectroscopic technique to adaptively control various components within the engine.

CONNECTING ROD

A connecting rod for an engine is provided. The connecting rod includes a first connecting rod portion and a second connecting rod portion. The second connecting rod portion is adapted to move with respect to the first connecting rod portion. The connecting rod further includes a compressible fluid contained in an internal volume. The compressible fluid is adapted to vary a length of the connecting rod such that the length of the connecting rod decreases based on a compression of the compressible fluid. Further, the length of the connecting rod increases based on an expansion of the compressible fluid. The connecting rod also includes at least one limit stop adapted to restrict a movement of the second connecting portion beyond a predefined limit. Further, the connecting rod is adapted to passively vary a compression ratio of the engine based on the variation in the length of the connecting rod. 1a first connecting rod portion coupled to the crankshaft;a second connecting rod portion coupled to the piston, wherein the second connecting rod portion is adapted to move with respect to the first connecting rod portion;a compressible fluid contained in an internal volume, the compressible fluid adapted to vary a length of the connecting rod such that the length of the connecting rod decreases based on a compression of the compressible fluid, and such that the length of the connecting rod increases based on an expansion of the compressible fluid; andat least one limit stop adapted to restrict a movement of the second connecting portion beyond a predefined limit;wherein the connecting rod is adapted to passively vary a compression ratio of the engine based on the variation in the length of the connecting rod.. A connecting rod for an engine, the engine having a piston and a crankshaft, the connecting rod comprising: The present disclosure relates to a connecting rod, and more particularly a variable length connecting rod.A “compression ratio” of an engine is defined as a ...

A four-stroke internal combustion engine with variable compression ratio

A four-stroke internal combustion engine with variable compression ratio, comprises a crankcase, a crankshaft, a connecting rod having a big end and a small end. A piston is rotatably connected to the small end. A crank member rotatably mounted on the crankpin has a bearing portion which is eccentrically disposed with respect to the crankpin, wherein the bearing portion has an outer circumferential wall including a location of maximum eccentricity (P) which bears the big end of the connecting rod such that the connecting rod is rotatably mounted on the bearing portion of the crank member via the big end. Under operating conditions at or close to top dead center of the piston the angle between the connecting rod plane and the piston plane changes from a pre-angle before top dead center to a post-angle after top dead center. 1. A four-stroke internal combustion engine with variable compression ratio , comprising:a crankcase;a crankshaft being rotatable with respect to the crankcase about a crankshaft axis, wherein the crankshaft has a crankpin including a crankpin axis;a connecting rod including a big end and a small end, wherein the connecting rod has a center line which lies in a connecting rod plane;a piston being rotatably connected to the small end, wherein the piston is movable in a direction parallel to a piston plane in which the crankshaft axis lies;a crank member being rotatably mounted on the crankpin, and comprising a bearing portion which is eccentrically disposed with respect to the crankpin, wherein the bearing portion has an outer circumferential wall including a location of maximum eccentricity (P) which bears the big end of the connecting rod such that the connecting rod is rotatably mounted on the bearing portion of the crank member via the big end, wherein the bearing portion has a center line which lies in the connecting rod plane, wherein under operating conditions at or close to top dead center of the piston the angle between the connecting rod ...

VARIABLE-COMPRESSION-RATIO INTERNAL COMBUSTION ENGINE

An upper oil pan assembly is attached to the lower portion of a cylinder block. An opening is formed on a side wall of the upper oil pan assembly. The variable compression ratio mechanism changes a top dead center position of a piston in accordance with the rotational position of a control shaft to thereby change the compression ratio. The control shaft is rotationally driven by an actuator. At least a portion of the actuator is fixed to a main bearing cap in a state in which at least a portion thereof is positioned on the outer side of an upper oil pan assembly. 1. A variable-compression-ratio internal combustion engine comprisinga case member that is attached to a lower portion of a cylinder block and that forms a crank chamber together with the cylinder block;a plurality of bearing members that are attached to the lower portion of the cylinder block and that, with the cylinder block, forms a crankshaft bearing portion that rotatably supports a crankshaft therebetween;a multi-link piston crank mechanism that is positioned inside the crank chamber and that changes a top dead center position of a piston in accordance with a rotational position of a control shaft to thereby change a compression ratio; andan actuator that is fixed to a plurality of the bearing members in a state in which at least a portion thereof is positioned on an outer side of the case member, and that rotationally drives the control shaft of the multi-link piston crank mechanism,the case member having an opening on a side surface along a cylinder row direction,the actuator having a fixing part that closes the opening, andthe fixing part being fixed by bolts to the plurality of bearing members from the opening.2. (canceled)3. The variable-compression-ratio internal combustion engine according to claim 1 , further comprisinga link member that is connected so as to be orthogonal to the control shaft, whereinthe actuator rotationally swings the link member to rotationally drive the control shaft ...

Control device of engine and control method of engine

An engine includes a variable compression-ratio mechanism adapted to change a compression ratio of an engine and a supercharger adapted to supply a compressed air to the engine. An engine control device that controls the engine controls the variable compression-ratio mechanism by setting target compression ratio such that the higher responsiveness of a supercharging pressure rise by the supercharger is, the lower the target compression ratio is.

VARIABLE-LENGTH CONNECTING ROD HAVING AN INDEXING DEVICE

A connecting rod for an internal combustion engine includes a first portion and a second portion respectively associated with a head and a foot. The portions are configured to slide relative to each other along the longitudinal axis of the connecting rod so as to form a variable-length connecting rod. The connecting rod comprises an indexing device of the first and second portions to ensure both of the portions are given a specific relative orientation. The indexing device comprises a first element, which is rigidly connected to the first portion and supported by the head of the connecting rod. 43. The connecting rod of claim , wherein the first element is a steering pin oriented parallel to the longitudinal axis of the connecting rod and the second element is a part having a bore , the bore having a size corresponding to a size of the pin.5. The connecting rod of claim 4 , wherein the first portion comprises a cap assembled by a fixing screw claim 4 , the first element comprising a projecting end of the fixing screw.6. The connecting rod of claim 5 , wherein the second element supports a target capable of being detected by a sensor claim 5 , in order to determine an effective length of the connecting rod.7. The connecting rod of claim 6 , wherein the target comprises a magnet housed in a hollow body claim 6 , the hollow body being fixed to the second element.82. The connecting rod of claim claim 6 , wherein the first element is a steering pin oriented parallel to the longitudinal axis of the connecting rod and the second element is a part having a bore claim 6 , the bore having a size corresponding to a size of the pin.92. The connecting rod of claim claim 6 , wherein the second element supports a target capable of being detected by a sensor claim 6 , in order to determine an effective length of the connecting rod.10. The connecting rod of claim 9 , wherein the target comprises a magnet housed in a hollow body claim 9 , the hollow body being fixed to the second ...

Rotational Angle Determining Device and Phase Shift Detection Method Therefor

A rotational angle determining device periodically samples a resolver signal output from a resolver receiving an alternating current excitation signal, the sampling being performed at a timing at which the excitation signal reaches a peak or trough value, based on a timer signal to which initial phase alignment is performed with respect to the excitation signal, and then the device performs A/D conversion of a voltage value of the sampled resolver signal, to determine the rotational angle of the rotor of the resolver. The excitation signal is periodically sampled at a predetermined timing based on the timer signal, and a presence or absence of a phase shift between the excitation and timer signals is detected based on a change in A/D converted value ADn (n=1, 2, . . . ) obtained by A/D conversion of a voltage value of the sampled excitation signal. 1. A rotational angle determining device comprising:a resolver that receives an alternating current excitation signal, and outputs an alternating current resolver signal induced by the excitation signal and having an amplitude that changes corresponding to a rotational angle of a rotor;a resolver signal converting unit that periodically samples the resolver signal at a timing at which the excitation signal reaches a peak or trough value in a case in which no phase shift has occurred between the excitation signal and a timer signal, based on the timer signal to which initial phase alignment is performed with respect to the excitation signal, and performs A/D conversion of a voltage value of the sampled resolver signal; anda rotational angle calculating unit that calculates a rotational angle of the rotor based on a first converted value obtained by the A/D conversion performed by the resolver signal converting unit,the rotational angle determining device further comprising:an excitation signal converting unit that periodically samples the excitation signal at a predetermined timing based on the timer signal, and performs A ...

VARIABLE GEOMETRY POWER TRANSFER FOR FLUID FLOW MACHINES

A fluid flow machine includes a casing including a cylinder and a crankshaft support. A piston is slidably disposed in the cylinder for reciprocating along an axis of the cylinder. A crankshaft includes a main bearing journal rotationally supported in the crankshaft support, a crankpin radially offset from an axis of the main bearing journal and a crank web connecting the main bearing journal and the crankpin. A multi-linkage connecting rod mechanism is connected between the piston and crankpin and includes a connecting rod, a first hinge link and a crankpin link pivotally connected to each other. A force transfer mechanism connects the multi-linkage connecting rod mechanism to the casing for transferring a vertical piston force into a horizontal crankpin force. 1. A fluid flow machine , comprising:a casing including a cylinder and a crankshaft support;a piston slidably disposed in the cylinder for reciprocating along an axis of the cylinder;a crankshaft including a main bearing journal rotationally supported in the crankshaft support, a crankpin radially offset from an axis of the main bearing journal and a crank web connecting the main bearing journal and the crankpin; a connecting rod having a first end connected to the piston and a second end opposite the first end, the connecting rod for reciprocating with the piston;', 'a first hinge link including a first end pivotally connected to the connecting rod second end and a second end opposite the first hinge link first end;', 'a crankpin link including a first end pivotally connected to the first hinge link second end and a second end rotationally connected to the crankpin;, 'a multi-linkage connecting rod mechanism comprisinga force transfer mechanism connecting the multi-linkage connecting rod mechanism to the casing for transferring a vertical piston force into a horizontal crankpin force.2. The fluid flow machine of and further comprising:wherein the multi-linkage connecting rod mechanism further comprises:a ...

ACTUATOR FOR LINK MECHANISM FOR INTERNAL COMBUSTION ENGINE

Provided is an actuator for a link mechanism for an internal combustion engine, which is capable of improving a degree of freedom in layout while reducing the number of components. The actuator for a link mechanism for an internal combustion engine according to the present invention includes a rolling bearing provided between a wave generator of a wave gear speed reducer and a housing or a motor housing. An inner ring of the rolling bearing is fixed to the wave generator. A restricting portion configured to restrict movement of an outer ring of the rolling bearing to both sides in an axial direction with respect to the housing or the motor housing is provided. 1. An actuator for a link mechanism for an internal combustion engine , the actuator comprising:a control link having one end portion coupled to the link mechanism for the internal combustion engine;a control shaft configured to change a posture of the control link through rotation;a housing configured to rotatably support the control shaft; anda wave gear type speed reducer configured to transmit a rotation speed of an output shaft of a drive motor to the control shaft after reducing the rotation speed, a circular spline provided in the housing and having internal teeth;', 'a flex spline arranged on an inner side of the circular spline and having external teeth formed on an outer periphery, the flex spline being configured to transmit the rotation to the control shaft;', 'a wave generator configured to be rotated by the output shaft of the drive motor to warp the flex spline into an ellipsoidal shape so as to partially mesh the external teeth of the flex spline with the internal teeth of the circular spline, and configured to rotate a meshed portion between the flex spline and the circular spline; and', 'a rolling bearing provided between the wave generator and the housing or a motor housing for the drive motor and including an inner ring fixed to the wave generator,, 'the wave gear type speed reducer ...

ACTUATOR OF VARIABLE COMPRESSION RATIO MECHANISM AND ACTUATOR OF LINK MECHANISM

An actuator of a variable compression ratio mechanism includes: a control link; an arm link; a control shaft; a housing including a receiving portion in which a connection portion between the second end portion of the control link and the arm link is received, and a support hole formed within the housing, and rotatably supporting the control shaft; and a speed reduction device, the control shaft including a fixing portion inserted and fixed within the receiving portion in a fixing hole formed in the arm link at a predetermined axial position, and a first journal portion which is formed at a tip end portion of the control shaft, which has a diameter smaller than a diameter of the fixing portion, and which is supported by a first bearing hole formed in the support hole. 1. An actuator of a variable compression ratio mechanism arranged to vary at least one of an upper dead center position and a lower dead center position of a piston of an internal combustion engine , and to vary a mechanical compression ratio , the actuator comprising:a drive motor;a control shaft arranged to be rotated by the drive motor;a member including a fixing hole to which the control shaft is fixed by a press-fit, the member being arranged to transmit a driving force of the control shaft to the variable compression ratio mechanism; anda housing including a receiving portion that receives a section in which the member is fixed to the control shaft, and that is opened in a radial direction of the control shaft, and a support hole that is opened to the receiving hole, and that rotatably supports the control shaft.2. The actuator for the variable compression ratio mechanism as claimed in claim 1 , wherein the actuator further comprises a speed reduction device which is arranged to reduce a rotation speed of the drive motor claim 1 , and to transmit the speed-reduced rotation to the control shaft; and the speed reduction device includes an inner gear which has a circular shape claim 1 , which is ...

INTERNAL COMBUSTION ENGINE

An internal combustion engine for a motor vehicle included a crankshaft, at least one piston coupled to the crankshaft for performing strokes in a cylinder as a consequence of a rotation of the crankshaft. An eccentric shaft is coupled to the crankshaft and to the piston in such a manner that through it strokes of the piston are extendable. The internal combustion engine further includes a phase adjuster for adjusting a phase of the coupling of the eccentric shaft to the crankshaft and/or a stroke adjuster for adjusting strokes of the piston, in particular an extension of strokes of the piston by the eccentric shaft. 115-. (canceled)16. An internal combustion engine for a motor vehicle , comprising:a crankshaft;a piston coupled to the crankshaft for performing strokes in a cylinder as a consequence of a rotation of the crankshaft; andan eccentric shaft coupled to the crankshaft and to the piston in such a manner that the strokes of the piston are extendable; andan adjustment mechanism selected from the group consisting of a phase adjuster configured to adjust a phase of a coupling of the eccentric shaft to the crankshaft, and a stroke adjuster configured to adjust an extension of the stroke of the piston by the eccentric shaft.17. The internal combustion engine according to further comprising a second piston coupled to the crankshaft for performing strokes in a second cylinder as a consequence of the rotation of the crankshaft claim 16 , wherein the eccentric shaft is coupled to the crankshaft and to the second piston in such a manner that the strokes of the second piston are extendable.18. The internal combustion engine according to further comprising a second stroke adjuster configured to adjust an extension of the stroke of the second piston by the eccentric shaft.19. The internal combustion engine according to claim 16 , further comprising an adjustable crank drive operably coupling the crankshaft claim 16 , the eccentric shaft and the piston.20. The internal ...

MAGNETICALLY-ACTUATED VARIABLE-LENGTH CONNECTING ROD DEVICES AND METHODS FOR CONTROLLING THE SAME

An apparatus can include: a piston head configured to be disposed inside of a cylinder of an engine; a connecting rod device coupled to the piston head and extending therefrom, the connecting rod device including: a variable-length connecting rod including a female component with a hollow body and a male component movably disposed at least partially inside of the female component, the male component configured to be coupled to a crankshaft of the engine, and a connecting rod magnet movably coupled to the female component; and a piston coupling mechanism disposed at least partially inside of the piston head to couple the connecting rod device to the piston head. The connecting rod device can be configured to transition between a coupled state and a de-coupled state. 1. An apparatus comprising:a piston head configured to be disposed inside of a cylinder of an engine; a variable-length connecting rod including a female component with a hollow body and a male component movably disposed at least partially inside of the female component, the male component configured to be coupled to a crankshaft of the engine, and', 'a connecting rod magnet movably coupled to the female component; and, 'a connecting rod device coupled to the piston head and extending therefrom, the connecting rod device includinga piston coupling mechanism disposed at least partially inside of the piston head to couple the connecting rod device to the piston head,wherein the connecting rod device is configured to transition between a coupled state, in which the male component is held in unison with the female component, and a de-coupled state, in which the connecting rod magnet moves in response to a magnetic field proximate to the cylinder causing a release of the male component, allowing the male component to move independent of the female component along an axis of the connecting rod.2. The apparatus of claim 1 , wherein the connecting rod device further includes first and second male-female coupling ...

Drive Apparatus and Drive Method for Brushless Motor

A drive apparatus and a drive method for a brushless motor, capable of reducing noise occurring due to pulse shift processing, is provided. The drive apparatus for the brushless motor comprises one shunt resistor and a controller. The shunt resistor measures a phase current of the three-phase brushless motor. The controller measures the phase current of the brushless motor in a one-shunt system by using the shunt resistor, and controls driving of the brushless motor based on the measured phase current. The controller performs pulse shift when a voltage pulse width in a drive wire of the brushless motor is greater than a predetermined value, whereas the controller does not perform the pulse shift when the voltage pulse width is less than the predetermined value. 1. A drive apparatus for a three-phase brushless motor , comprising:a shunt resistor for measuring a phase current of the brushless motor; anda controller that measures the phase current of the brushless motor in a one-shunt system by using the shunt resistor, and controls driving of the brushless motor based on the measured phase current, in which the controller performs pulse shift when a voltage pulse width in a drive wire of the brushless motor is greater than a predetermined value, whereas the controller does not perform the pulse shift when the voltage pulse width is less than the predetermined value.2. The drive apparatus for the brushless motor claim 1 , according to claim 1 , wherein the controller comprises a drive circuit that drives the brushless motor claim 1 , and a control unit that controls the drive circuit.3. The drive apparatus for the brushless motor claim 2 , according to claim 2 , wherein the drive circuit comprises a three-phase bridge circuit claim 2 , each phase of which is provided with a pair of switching elements claim 2 , the drive circuit converting a direct-current power supplied from a power source into an alternating-current power claim 2 , to supply the alternating-current ...

METHODS AND SYSTEM FOR OPERATING AN ENGINE

Systems and methods for operating an engine that includes a compression ratio linkage for adjusting engine compression ratio are described. The systems and methods provide different ways of changing a compression ratio of an engine based on forecast or anticipated engine operating conditions. In one example, the forecast or anticipated engine operating conditions may include a forecast or anticipated transmission gear shift. 1. An engine operating method , comprising:adjusting an engine's compression ratio via a controller responsive to present engine speed and engine load;forecasting a shifting of a transmission from a first gear to a second gear via the controller; andadjusting an engine's compression ratio via the controller responsive to an engine speed and engine load based on the forecasted shifting of the transmission.2. The method of claim 1 , where the engine's compression ratio is adjusted before the shifting of the transmission from the first gear to the second gear.3. The method of claim 2 , where adjusting the engine's compression ratio before the shifting of the transmission from the first gear to the second gear includes beginning to change the engine's compression ratio beginning at a time before the shifting of the transmission from the first gear to the second gear begins claim 2 , the time being a time the shifting of the transmission from the first gear to the second gear begins minus a time for a compression ratio changing actuator to change the engine from its present compression ratio to a compression ratio based on engine speed and engine load after shifting the transmission from the first gear to the second gear.4. The method of claim 1 , where the first gear is a higher gear than the second gear so that the shifting of the transmission from the first gear to the second gear is a downshift.5. The method of claim 1 , where the first gear is a lower gear than the second gear so that the shifting of the transmission from the first gear to the ...

SYSTEM AND METHOD FOR ENGINE CONTROL WITH PRESSURE REACTIVE DEVICE TO CONTROL COMBUSTION TIMING

The present disclosure relates to a system for controlling ignition of an intake charge directed into an internal combustion engine. The system may have a movable component operably associated with at least one of a piston of the engine or a combustion chamber of the engine. The movable component may be tuned to deflect in response to a predetermined pressure being reached in a cylinder in which the piston is housed. The movable component operates to deflect in response to the predetermined pressure being reached in the cylinder as the piston travels toward top dead center during its compression stroke, to change a compression ratio of the engine. 1. A system for controlling ignition of an air/fuel mixture intake charge directed into an internal combustion engine , the system comprising:a piston;a movable component operably associated with the piston of the engine;the movable component being tuned to move in response to a predetermined pressure being reached in the combustion chamber during movement of the piston within a cylinder of the engine, as the piston travels toward top dead center during its compression stroke, to change a compression ratio of the engine; anda dashpot operably associated with the piston for providing a biasing force which is applied to the movable component.2. The system of claim 1 , wherein the piston has a first skirt portion adapted to be coupled to a connecting rod of the engine claim 1 , and wherein the movable component comprises:a second skirt portion coupled to the first skirt portion and movable independently of the first portion; andthe second skirt portion including a crown.3. The system of claim 2 , wherein the dashpot is interposed between the first and second skirt portions to provide a biasing force against which the movable component acts claim 2 , the biasing force being overcome when the predetermined pressure is reached in the combustion chamber claim 2 , thus enabling the second skirt portion to move toward the first ...

CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

To improve accuracy in misfire determination, a control apparatus for an internal combustion engine that controls an internal combustion engine having a variable compression ratio mechanism capable of changing the compression ratio of the internal combustion engine includes a controller configured to: determine that a misfire occurs if the magnitude of rotational fluctuation of the internal combustion engine is equal to or larger than a misfire criterion value and to make the misfire criterion value larger during the time in which changing of the compression ratio of the internal combustion engine is in progress than during the time in which the compression ratio is not being changed. 1. A control apparatus for an internal combustion engine that controls an internal combustion engine having a variable compression ratio mechanism capable of changing the compression ratio of the internal combustion engine , comprising:a controller configured to:determine that a misfire occurs if the magnitude of rotational fluctuation of the internal combustion engine is equal to or larger than a misfire criterion value; andmake said misfire criterion value larger during the time in which changing of the compression ratio of the internal combustion engine is in progress than during the time in which the compression ratio is not being changed.2. A control apparatus for an internal combustion engine that controls an internal combustion engine having a variable compression ratio mechanism capable of changing the compression ratio of the internal combustion engine , comprising:a controller configured to:determine that a misfire occurs in a misfire determination target cylinder if the magnitude of rotational fluctuation is equal to or larger than a misfire criterion value, the magnitude of rotational fluctuation being the difference between a misfire correlative value with the misfire determination target cylinder defined as a cylinder for which misfire determination is performed and the ...

Infinitely Variable Compression Ratio Mechanism of a Reciprocating Double-acting Piston-Type Gas Compressor

A crank-piston mechanism for a reciprocating double-acting piston-type gas compressor that allows for infinitely variable compression ratios during operations. The mechanism includes a gear pin crankshaft, a forward piston-connecting rod, a rearward piston-connecting rod, a forward crosshead, a rearward tubular crosshead, and a tandem piston assembly. The forward piston-connecting rod and the rearward piston-connecting rod are each rotatably connected to the gear pin crankshaft about two parallel but offset axes. On the opposite end, the forward piston-connecting rod and the rearward piston-connecting rod are connected to the forward crosshead and the rearward tubular crosshead, respectively. Wherein, the forward crosshead is slidably mounted within the rearward tubular crosshead. The forward crosshead is connected to a forward piston from the tandem piston assembly and the rearward tubular crosshead is connected to a rearward piston from the tandem piston assembly. The forward piston and the rearward piston are aligned for reciprocating motion. 1. An infinitely variable compression ratio mechanism of a reciprocating double-acting piston-type gas compressor comprises:a gear pin crankshaft;a forward piston-connecting rod;an at least one rearward piston-connecting rod;a forward crosshead;a rearward tubular crosshead;a forward piston shaft;a rearward piston tube;a tandem piston assembly;the forward piston-connecting rod being terminally and rotatably connected to the gear pin crankshaft about a forward piston rotation axis;the rearward piston-connecting rod being terminally and rotatably connected to the gear pin crankshaft about a rearward piston rotation axis;the forward piston rotation axis and the rearward piston rotation axis being positioned parallel and equally offset to each other;the forward crosshead being terminally and rotatably connected to the forward piston-connecting rod, opposite the gear pin crankshaft;the rearward tubular crosshead being terminally ...

CONTROL METHOD AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control method for internal combustion engine includes forming an air-fuel mixture leaner than that at a stoichiometric air-fuel ratio in a cylinder by first fuel injection, performing second fuel injection to inject fuel toward the vicinity of a discharge channel of an ignition plug during a period in which the air-fuel mixture is undergoing a low temperature oxidation reaction in a compression stroke, and after the second fuel injection, performing spark ignition by the ignition plug at a timing at which a spark of the ignition plug reaches the fuel injected by the second fuel injection. 1. A control method for internal combustion engine , comprising:forming an air-fuel mixture leaner than that at a stoichiometric air-fuel ratio in a cylinder by first fuel injection;performing second fuel injection to inject an amount of fuel to make an air-fuel ratio of the air-fuel mixture in the entire cylinder including the air-fuel mixture formed by the first fuel injection leaner than the stoichiometric air-fuel ratio toward the vicinity of a discharge channel of an ignition plug during a period in which the air-fuel mixture is undergoing a low temperature oxidation reaction in a compression stroke; andperforming spark ignition by the ignition plug at a timing at which a spark of the ignition plug reaches the fuel injected by the second fuel injection after the second fuel injection.2. The control method for internal combustion engine according to claim 1 , wherein:the internal combustion engine includes a supercharger; andsupercharging by the supercharger is performed so that the low temperature oxidation reaction occurs.3. The control method for internal combustion engine according to claim 1 , wherein:the internal combustion engine includes a variable compression ratio mechanism; anda compression ratio is increased by the variable compression ratio mechanism so that the low temperature oxidation reaction occurs.4. A control device for internal combustion engine claim 1 ...

ENGINE WITH VARIABLE COMPRESSION RATIO

A compression ratio varying arrangement of an engine is adapted to work with a crankshaft having at least one crankpin offset from the centerline of the crankshaft. An eccentric has an internal bore engaged with the crankpin, and an external cylindrical surface that has a centerline that is offset from the centerline of the internal bore. A connecting rod is engaged with the external cylindrical surface of the eccentric, and a piston is connected to the connecting rod. An eccentric lever is attached to the eccentric. A compression ratio adjustment link is connected to the eccentric lever. A compression ratio adjustment mechanism is connected to the compression ratio adjustment link. The compression ratio adjustment mechanism controls the orientation of the connecting rod eccentric, and thereby the compression ratio of the engine, by extending or retracting the compression ratio adjustment link. 1. A vehicle having an Engine with a Variable Compression Ratio , comprising:a crankshaft having at least one crankpin offset from the centerline of the crankshaft;a connecting rod eccentric having an eccentric internal bore engaged with the at least one crankpin, the connecting rod eccentric further having an eccentric external cylindrical surface, the eccentric external cylindrical surface having a centerline that is offset from the centerline of the eccentric internal bore;a connecting rod engaged with the eccentric external cylindrical surface of the connecting rod eccentric, and a piston connected to the connecting rod;an eccentric lever attached to the connecting rod eccentric;a compression ratio adjustment link connected to the eccentric lever; anda compression ratio adjustment mechanism connected to the compression ratio adjustment link.2. The vehicle of claim 1 , wherein:the eccentric lever extends through a connecting rod window in the connecting rod.3. The vehicle of claim 1 , wherein:the compression ratio adjustment mechanism is connected to and controlled by a ...

Method for the Variable Adjustment of a Compression Ratio of a Combustion Chamber of an Internal Combustion Engine

A method for variably adjusting a compression ratio of combustion chamber of an internal combustion engine employs a device of a piston associated with the combustion chamber. The device is coupled via respective coupling areas to a piston pin for connecting the piston to a connecting rod of the internal combustion engine. To adjust the compression ratio the piston pin, which is associated with the device, is rotated relative to the piston. The piston pin includes at least one eccentric element arranged eccentrically with regard to the coupling area of the piston pin for connecting the piston pin to the connecting rod. 16-. (canceled)7. A method for variably adjusting a compression ratio of a combustion chamber of an internal combustion engine , the method comprising:actuating a device of a piston associated with the combustion chamber and coupled via respective coupling areas to a piston pin connecting the piston to a connecting rod of the internal combustion engine, wherein the actuation of the device causes the piston pin to rotate, wherein the piston pin comprises at least one eccentric element arranged eccentrically with regard to the coupling area of the piston pin and which connects the piston pin to the connecting rod, and wherein to rotate the piston pin at least one locking element of the device is moved relative to the piston pin and relative to the piston from a locking position preventing the rotation into a release position enabling the rotation, wherein the rotation of the piston pin relative to the piston occurs by centrifugal or inertial forces of the piston moving in the combustion chamber or as a result of pressure forces in the combustion chamber; andsealing a crank chamber of a crankcase by at least one actuator element with respect to at least one further chamber of the crankcase, wherein the crank chamber is associated with the combustion chamber and with the piston, a crankshaft is arranged at least in certain areas in the crankcase, wherein ...

Control system for internal combustion engine

A control system is applied to an internal combustion engine having a plurality of cylinders, a variable compression ratio changer configured to change the compression ratio of each of the cylinders of the internal combustion engine individually, in-cylinder injection valves that inject fuel into the respective cylinders, and in-passage injection valves each of which injects fuel into an intake passage corresponding to each of the cylinders. To reduce differences in the air-fuel ratio among the cylinders during changing the compression ratio, the control system makes the proportion of the quantity of fuel injected through the in-passage injection valves to the total quantity of fuel injected through the in-cylinder injection valves and the in-passage injection valves larger during the time in which the compression ratios of all the cylinders are being changed than during the time in which the compression ratios of all the cylinders are fixed.

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE AND METHOD OF ESTIMATING COMBUSTION CHAMBER-WALL TEMPERATURE OF INTERNAL COMBUSTION ENGINE

In a control device for an internal combustion engine and a method of estimating a combustion chamber-wall temperature of an internal combustion engine of the invention, a difference between a wall temperature of the combustion chamber and a cooling water temperature is set according to an integrated value of the intake air amount of the internal combustion engine after start of the fuel-cut, and the estimated value of the wall temperature of the combustion chamber during the fuel-cut is obtained based on the difference and the cooling water temperature. 1. A control device for an internal combustion engine , comprising:a fuel-cut unit that performs fuel-cut for stopping supply of fuel to a combustion chamber in a deceleration operation of an internal combustion engine;a wall temperature estimating unit that estimates a wall temperature of the combustion chamber; anda combustion control unit that controls combustion of the internal combustion engine based on an estimated value of the wall temperature of the combustion chamber,the wall temperature estimating unit setting a difference between the wall temperature of the combustion chamber and a cooling water temperature according to an integrated value of an intake air amount of the internal combustion engine after start of the fuel-cut, and obtains the estimated value of the wall temperature of the combustion chamber during the fuel-cut based on the difference and the cooling water temperature.2. The control device for an internal combustion engine according to claim 1 ,wherein the wall temperature estimating unit uses a difference between the estimate of the wall temperature of the combustion chamber at the time of start of the fuel-cut and the cooling water temperature as an initial value, and reduces the difference according to an increase in the integrated value.3. The control device for an internal combustion engine according to claim 1 ,wherein the wall temperature estimating unit changes the estimated value of ...

ACTUATOR OF VARIABLE COMPRESSION RATIO MECHANISM FOR INTERNAL COMBUSION ENGINE AND VARIABLE COMPRESSION RATIO APPARATUS FOR INTERNAL COMBUSTION ENGINE

An actuator of a variable compression ratio mechanism for an internal combustion engine includes an arm link configured to change a posture of the variable compression ratio mechanism for the internal combustion engine by swinging, a second control shaft fixed to the arm link , and a housing including a first bearing hole a supporting the second control shaft . The housing includes a lubricant oil supply oil passage opened to a pressure-receiving range over which a contact pressure is received at the first bearing hole a from the second control shaft during an expansion stroke of the internal combustion engine. 1. An actuator of a variable compression ratio mechanism for an internal combustion engine , the actuator comprising:an arm link coupled with the variable compression ratio mechanism and configured to change a posture of the variable compression ratio mechanism for the internal combustion engine by swinging;a control shaft including the arm link;an electric motor configured to rotate the control shaft; anda housing including a bearing portion that supports the control shaft, and an oil passage opened to a pressure-receiving range over which a contact pressure is received from the control shaft during an expansion stroke of the internal combustion engine in a circumferential direction of the bearing portion.2. The actuator of the variable compression ratio mechanism for the internal combustion engine according to claim 1 , wherein the control shaft is rotatable in a predetermined angular range smaller than 360 degrees claim 1 , andwherein the pressure-receiving range is a continuous single range includingone end-side pressure-receiving range over which the bearing portion receives the contact pressure from the control shaft when a rotational angle of the control shaft is located at one end of the predetermined angular range, andanother end-side pressure-receiving range over which the bearing portion receives the contact pressure from the control shaft when the ...

METHODS AND SYSTEMS FOR A VARIABLE COMPRESSION ENGINE

Methods and systems are provided for adjusting a compression ratio. In one example, a system may include rotating an eccentric ring of a crankshaft by flowing hydraulic fluid to first and second chambers to actuate the eccentric ring. 1. A system comprising:a crankshaft eccentric ring comprising a first protrusion and a second protrusion rotated by hydraulic fluid in one or more of a first chamber and a second chamber.2. The system of claim 1 , wherein the first hydraulic chamber is a low compression chamber and the second hydraulic chamber is a high compression chamber.3. The system of claim 1 , wherein the eccentric ring is sandwiched between a first counterweight and a second counterweight claim 1 , and where the first chamber is arranged in the first counterweight and the second chamber is arranged in the second counterweight.4. The system of claim 1 , wherein the first protrusion contacts only hydraulic fluid in the first chamber and where the second protrusion contacts only hydraulic fluid in the second chamber.5. The system of claim 1 , wherein hydraulic fluid flow to and from the first and second chambers is proportional claim 1 , wherein an amount of hydraulic fluid flowing into the first chamber is equal to an amount of hydraulic fluid flowing out of the second chamber or vice-versa.6. The system of claim 1 , wherein the first and second chambers are identical in size and shape claim 1 , and where the first chamber comprises a first chamber opening adjacent the first extreme end and where the second chamber comprises a second chamber opening adjacent the second extreme end.7. The system of claim 6 , wherein the first protrusion and the second protrusion are rectangular prism shaped claim 6 , and where an edge of the first protrusion nearest the first chamber opening is beveled claim 6 , and where an edge of the second protrusion nearest the second chamber opening is beveled.8. The system of claim 6 , wherein there are no other inlets or additional outlets ...

VARIABLE COMPRESSION RATIO APPARATUS

A VCR apparatus may include a connecting rod at which a small end forming a hole having a circular shape to be rotatably connected with a piston pin moving together with the piston and a large end rotatably connected with a crank pin eccentrically arranged with respect to the crankshaft are formed; an eccentric cam concentrically arranged and rotatably disposed in the hole of the small end and configured so that the piston pin is eccentrically inserted thereinto and is rotatably connected therewith; a latching pin disposed in the small end to make a reciprocal rectilinear motion in a direction of rotation axis of the small end and operated to selectively latch the small end with the eccentric cam in one among at least two relative positions between the small end and the eccentric cam; and an acting oil passage formed at the connecting rod. 1. A variable compression ratio (VCR) apparatus which is mounted in an engine rotating a crankshaft upon receiving combustion power of a mixture of air and fuel from a piston and is configured to change a compression ratio of the mixture according to a driving condition of the engine , the VCR apparatus comprising: a small end portion having a circular hole to be rotatably connected to a piston pin moving with the piston; and', 'a large end portion rotatably connected to a crank pin eccentrically mounted with respect to the crankshaft;, 'a connecting rod includingan eccentric cam concentrically mounted and rotatably mounted in the circular hole of the small end portion, wherein the piston pin is eccentrically inserted into a piston pin insertion hole of the eccentric cam and is rotatably connected with the eccentric cam;a latching pin mounted in the small end portion to make a reciprocal rectilinear motion in a direction of rotation axis of the small end portion and operated to selectively latch the small end portion with the eccentric cam in one among at least two relative positions between the small end portion and the eccentric ...

VARIABLE COMPRESSION RATIO APPARATUS

A variable compression ratio apparatus is provided. The apparatus includes a connecting rod, a small end forming an aperture to be rotatably connected with a piston pin moving together with a piston, a larger end rotatably connected with a crankpin eccentrically arranged with respect to the crankshaft. An acting oil passage allows hydraulic pressure to be supplied from the larger end to the small end. An eccentric cam is concentrically arranged and rotatably disposed in the aperture of the small end. The piston pin is inserted thereinto and rotatably connected therewith. A latching pin is disposed in the small end to generate a reciprocal rectilinear motion in a direction of a rotation axis of the small end and selectively latches the small end with the eccentric cam in one of at least two relative positions between the small end and the eccentric cam by hydraulic pressure. 1. A variable compression ratio (VCR) apparatus installed within an engine that rotates a crankshaft upon receiving combustion power of a fuel mixture from a piston and changes a compression ratio of the mixture based on a driving condition of the engine , the VCR apparatus comprising:a connecting rod at which a small end forming an aperture having a circular shape to be rotatably connected with a piston pin moving together with the piston, a larger end rotatably connected with a crankpin eccentrically arranged with respect to the crankshaft, and an acting oil passage formed such that hydraulic pressure is supplied from the second end to the small end;an eccentric cam concentrically arranged and rotatably disposed in the aperture of the small end and the piston pin is eccentrically inserted thereinto and is rotatably connected therewith;a latching pin disposed in the small end to generate a reciprocal rectilinear motion in a direction of an axis of rotation of the small end and operated to selectively latch the small end with the eccentric cam in one among at least two relative positions between ...

Variable compression ratio apparatus

A variable compression ratio apparatus may include a plunger configured to move up and down in response to rotation of a crank shaft, a piston having a chamber formed thereinside, into which the plunger is inserted, and configured to move up and down with the plunger, the chamber including an upper chamber formed above the plunger and a lower chamber formed below the plunger, a spool valve configured to selectively supply oil to the upper chamber or to the lower chamber, and a controller configured to control the spool valve so that the piston moves up and down with respect to the plunger.

VARIABLE COMPRESSION RATIO APPARATUS

A variable compression ratio apparatus may include a crankshaft, a connecting rod, first and second eccentric links mounted at both sides of the connection rod, respectively, and having one ends at which the piston pin may be eccentrically and rotatably installed, a swing link of which one end may be branched into two parts to form first and second branches, the first and second branches being connected to the other ends of the first and second eccentric links, and a control device connected to the other end of the swing link to control the swing link, wherein the crank arm includes guide surfaces formed in a predetermined thickness at an inner circumferential surface of the crank arm so that the first and second branches of the swing link slide to move between the guide surfaces. 1. (canceled)2. The variable compression ratio apparatus of claim 8 ,wherein the guide surfaces are formed in a plane, andwherein predetermined portions formed between the one ends and the other ends of the first and second branches are in shape of planes corresponding to the guide surfaces so as to slide between the guide surfaces.3. The variable compression ratio apparatus of claim 2 , wherein outer circumferential surfaces of the predetermined portions in the first and second eccentric links are shaped in planes protruding outwardly so as to slide between the guide surfaces.4. The variable compression ratio apparatus of claim 8 , wherein the one ends of the first and second eccentric links include eccentric bearings mounted between the one end of the connecting rod and the piston pin so that the piston pin eccentrically passes through the eccentric bearings.5. The variable compression ratio apparatus of claim 4 , wherein the eccentric bearings are integrally formed with the first and second eccentric links.6. The variable compression ratio apparatus of claim 8 , wherein the control device includes:a control link of which one end is rotatably connected to the other end of the swing link; ...

INTERNAL COMBUSTION ENGINE CONTROL APPARATUS

Because an in-cylinder temperature becomes low immediately after cold starting, it is impossible to take large ignition timing retard to avoid combustion instability and it takes time to activate a catalyst existing downstream of an internal combustion engine. 1. An internal combustion engine control apparatus including an ignition timing control unit to control an ignition timing of an ignition device attached to an internal combustion engine ,the internal combustion engine control apparatus comprising: an in-cylinder temperature raising unit that raises an in-cylinder temperature, wherein the in-cylinder temperature is raised by the in-cylinder temperature raising unit and a retard amount of the ignition timing of the ignition device is increased by the ignition timing control unit.2. The internal combustion engine control apparatus according to claim 1 , wherein the in-cylinder temperature raising unit closes an exhaust valve before a top dead center in an exhaust stroke claim 1 , thereby providing an NVO period where an exhaust is compressed.3. The internal combustion engine control apparatus according to claim 2 , wherein the ignition timing of the ignition device is retarded by the ignition timing control unit after the NVO period is provided by the in-cylinder temperature raising unit.4. The internal combustion engine control apparatus according to claim 2 , wherein gas is injected into a cylinder during the NVO period and a pressure in a combustion chamber is increased.5. The internal combustion engine control apparatus according to claim 1 , wherein the in-cylinder temperature raising unit sets an intake valve closing timing to the vicinity of a bottom dead center to eliminate blowing back to an intake pipe claim 1 , in an intake stroke or a compression stroke.6. The internal combustion engine control apparatus according to claim 1 , wherein the in-cylinder temperature raising unit increases a mechanical compression ratio in a compression stroke or an ...

SWITCH VALVE AND CONNECTING ROD WITH SWITCH VALVE

A switch valve for controlling a flow of a hydraulic fluid in a connecting rod for a variable compression internal combustion engine, the switch valve including a capture element; a valve housing including a first operating connection and a second operating connection and a supply connection that is loadable with a hydraulic pressure of the hydraulic fluid, wherein the capture element is arranged in the valve housing and optionally movable into a first switching position or a second switching position, wherein the first operating connection is connected with the supply connection or a tank in the first switching position, wherein the second operating connection is connected with the supply connection or the tank in the second switching position, wherein at least one check valve is provided which facilitates a flow of the hydraulic fluid from the second operating connection to the first operating connection. 1. A switch valve for controlling a flow of a hydraulic fluid in a connecting rod for a variable compression internal combustion engine with an eccentrical element adjustment arrangement for adjusting an effective connecting rod length , the switch valve comprising:a capture element;a valve housing including a first operating connection and a second operating connection and a supply connection that is loadable with a hydraulic pressure of the hydraulic fluid,wherein the capture element is arranged in the valve housing and movable into a first switching position or a second switching position,wherein the first operating connection is connected with the supply connection or a tank in the first switching position,wherein the second operating connection is connected with the supply connection or the tank in the second switching position,wherein at least one check valve is provided which facilitates a flow of the hydraulic fluid from the second operating connection to the first operating connection.2. The switch valve according to claim 1 , wherein the check valve is ...

ABNORMALITY DIAGNOSTIC DEVICE FOR A VARIABLE COMPRESSION RATIO MECHANISM

An object is to carry out an abnormality diagnosis for a variable compression ratio mechanism without adding any special hardware configuration for estimating a compression ratio. An abnormality diagnostic device for a variable compression ratio mechanism adapted to be applied to an internal combustion engine comprises a controller configured to calculate a predetermined rotational speed difference which is a rotational speed difference, between an engine rotational speed at a predetermined crank angle before or after compression top dead center and an engine rotational speed in the vicinity of the compression top dead center for a predetermined cylinder at the time of carrying out fuel cut processing, set a reference range of the predetermined rotational speed difference, and make a diagnosis that abnormality has occurred in the variable compression ratio mechanism when the predetermined rotational speed difference is out of the reference range. 1. An abnormality diagnostic device for a variable compression ratio mechanism adapted to be applied to an internal combustion engine which includes:a variable compression ratio mechanism that changes a mechanical compression ratio of an internal combustion engine by changing a volume of a combustion chamber; andan engine rotational speed sensor that is configured to obtain an engine rotational speed of said internal combustion engine;said abnormality diagnostic device comprises a controller comprising at least one processor configured to:control a change of the mechanical compression ratio by means of said variable compression ratio mechanism by supplying a command signal to said variable compression ratio mechanism;calculate a predetermined rotational speed difference which is a rotational speed difference between an engine rotational speed at a predetermined crank angle before or after compression top dead center, and an engine rotational speed in the vicinity of the compression top dead center, for a predetermined ...

APPARATUS WITH VARIABLE COMPRESSION RATIO AND VARIABLE EXPANSION RATIO

Apparatus with variable compression ratio and variable expansion ratio for an internal combustion engine, mounted on the engine crankshaft and the assembly of the piston-connecting rod, comprising an actuating motor, a worm, a worm gear, a sun gear, a first transmission shaft, a plurality of the transmission shafts, a first eccentric sleeve, a plurality of eccentric sleeve, a front gear of the first eccentric sleeve, a plurality of the front gear of the eccentric sleeve, a plurality of the rear gear of the eccentric sleeve, a planetary gear, the rear gear of the first transmission shaft, a plurality of the front gear of the transmission shaft, and a plurality of the rear gear of the transmission shaft. An angle α between the axis of the first transmission shaft and the axis of the crankshaft is not zero, the other axes of the transmission shafts with the axis of the crankshaft coincide, or parallel but do not coincide, or form a non zero angle. 1. An apparatus with variable compression ratio and variable expansion ratio for an internal combustion engine , mounted on an engine crankshaft having a first main journal and a plurality of other orderly placed main journals and a first crankpin and a plurality of other orderly placed crankpins and an assembly of a piston-connecting rod having a bearing bush on a big end of the piston-connecting rod , comprisinga first supporting cylindrical hole in a first main journal, having an angle between an axis of the first supporting cylindrical hole and the crankshaft,each of the plurality of the other orderly placed main journals is provided respectively with a supporting cylindrical hole, an axis of each supporting cylindrical hole is either coaxial with or parallel to without overlapping an axis of the crankshaft or forms a non-zero angle between the axis of each supporting cylindrical hole and the axis of the crankshaft,an actuating motor fixed on a cylinder block of an engine,a worm connected fixedly coaxially together with ...

Control Device and Control Method for Vehicle Drive Mechanism

The present invention relates to a control device and to a control method for a vehicle drive mechanism including a moving body having a movability range regulated by two stoppers, and a sensor which senses a position of the moving body. The control device of the present invention learns an output of the sensor corresponding to a contact state of a high-rigidity stopper, and limits, to a lower level, an operation variable of the actuator for moving the moving body toward a low-rigidity stopper along with an increase in an amount of change in the output of the sensor from the contact state of the high-rigidity stopper. Then, the control device learns the output of the sensor corresponding to the contact state of the low-rigidity stopper, and controls the actuator based on the output of the sensor learned at both the stopper positions. 1. A control device for a vehicle drive mechanism including a moving body which is movably supported , two stoppers , each of which defines an end of a movability range of the moving body , an actuator which drives the moving body in a moving direction , and a sensor which senses a position of the moving body , the control device comprising:a learning unit that learns an output of the sensor corresponding to a contact state of each of the two stoppers,wherein the learning unit executes the learning for a high-rigidity stopper of the two stoppers prior to the learning for a low-rigidity stopper of the two stoppers.2. The control device for a vehicle drive mechanism according to claim 1 ,wherein when the low-rigidity stopper is brought into the contact state, the learning unit limits an operation variable of the actuator to a lower level along with an increase in an amount of change in the output of the sensor from the contact state of the high-rigidity stopper.3. The control device for a vehicle drive mechanism according to claim 2 ,wherein the learning unit limits the operation variable for moving the moving body toward the low-rigidity ...

MULTI-JOINT CRANK DRIVE OF AN INTERNAL COMBUSTION ENGINE, AND CORRESPONDING INTERNAL COMBUSTION ENGINE

A multi-joint crank drive of an internal combustion engine includes at least one coupling member rotataby supported on a crankpin of a crankshaft for rotation about a coupling member rotation axis; and at least one connecting rod supported on a crankpin of an eccentric shaft for rotation about an eccentric rotation axis, wherein the coupling member is connected with a piston rod of a piston of the internal combustion engine for pivoting about a piston rod rotation axis and with the connecting rod for rotation about a connecting rod rotation axis, said coupling member having a bearing eye receiving the crankpin of the crankshaft, wherein a coupling angle between an imagined straight line though the coupling member rotation axis and the connecting rod rotation axis and an imagined straight line through the coupling member ration axis and the piston rod rotation axis is at least 140° and at most 180°, wherein a center point of the coupling member is arranged outside the bearing eye, and on a side of a first plane which faces the piston of the internal combustion engine, said first plane receiving the coupling member rotation axis and the connecting rod rotation axis. 19.-. (canceled)10. A multi-joint crank drive of an internal combustion engine comprising:at least one coupling member rotatably supported on a crankpin of a crankshaft for rotation about a coupling member rotation axis; andat least one connecting rod supported on a crankpin of an eccentric shaft for rotation about an eccentric rotation axis,wherein the coupling member is connected with a piston rod of a piston of the internal combustion engine for pivoting about a piston rod rotation axis and with the connecting rod for rotation about a connecting rod rotation axis, said coupling member having a bearing eye receiving the crankpin of the crankshaft, wherein a coupling angle between an imagined straight line though the coupling member rotation axis and the connecting rod rotation axis and an imagined ...

CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control method and a control device are provided for an internal combustion engine structured to vary a mechanical compression ratio by varying a range of slide of a piston with respect to a cylinder bore. A control process includes: acquiring a temperature correlating with a cylinder bore wall temperature; fixing the mechanical compression ratio to a preset compression ratio point, in response to a condition that the acquired temperature is lower than a preset temperature point; and setting the preset temperature point higher than a point corresponding to a point of the cylinder bore wall temperature at which condensed water occurs in the cylinder bore. 17.-. (canceled)8. A control method for an internal combustion engine structured to vary a mechanical compression ratio by varying a range of slide of a piston with respect to a cylinder bore , the control method comprising:acquiring a temperature correlating with a cylinder bore wall temperature;fixing the mechanical compression ratio to a preset compression ratio point, in response to a condition that the acquired temperature is lower than a preset temperature point; andsetting the preset temperature point higher than a point corresponding to a point of the cylinder bore wall temperature at which condensed water occurs in the cylinder bore.9. The control method as claimed in claim 8 , wherein the piston includes a piston crown claim 8 , a first piston ring claim 8 , and a second piston ring claim 8 , and wherein the first piston ring is closer to the piston crown than the second piston ring claim 8 , the control method comprising:setting the preset compression ratio point to an intermediate compression ratio point between a minimum compression ratio point and a maximum compression ratio point of a range of control, wherein the first piston ring is higher in position when the mechanical compression ratio is at the preset compression ratio point than the second piston ring when the mechanical compression ratio is ...

ACTUATOR FOR LINK MECHANISM FOR INTERNAL COMBUSTION ENGINE

Provided is an actuator for a link mechanism for an internal combustion engine, which can be prevented from being increased in size in an axial direction. The actuator for a link mechanism for an internal combustion engine of the present invention includes: a wave gear type speed reducer configured to reduce a rotation speed of an electric motor, and to transmit the rotation speed to the control shaft; and a housing to which the electric motor and the wave gear type speed reducer are fixed, the wave gear type speed reducer including: an inner gear, which is fixed to the housing, has inner teeth meshed with the flexible outer gear, and is made of an iron-based metal material, the actuator including a stopper mechanism, which is provided to each of the inner gear and the control shaft, and is configured to restrict relative rotation of a predetermined amount or more when the inner gear and the control shaft are held in abutment against each other. 1. An actuator for a link mechanism for an internal combustion engine , the actuator being configured to rotate a control shaft configured to change a posture of the link mechanism of the internal combustion engine , a wave gear type speed reducer configured to reduce a rotation speed of an electric motor, and to transmit the rotation speed to the control shaft; and', 'a housing to which the electric motor and the wave gear type speed reducer are fixed,, 'the actuator comprising a wave generating device having an ellipsoidal-shaped contour coupled to an output shaft of the electric motor;', 'a flexible outer gear, which is configured to rotate integrally with the control shaft, has outer teeth formed on an outer periphery thereof, and includes a cylindrical portion that extends through an outer peripheral side of the wave generating device;', 'an inner gear, which is fixed to the housing, has inner teeth meshed with the flexible outer gear, and is made of an iron-based metal material,, 'the wave gear type speed reducer ...

Crank Drive for a Reciprocating-Piston Engine and a Reciprocating Piston Engine with Such a Crank Drive

A crank drive for a reciprocating-piston engine includes a crankshaft which has at least one crank pin. At least one eccentric is rotatably arranged on the crank pin via which at least one connecting rod is to be rotatably mounted on the crank pin. A piston can be arranged so as to move in a translatory fashion in a cylinder having a variable compression ratio of the reciprocating-piston engine and can be coupled in an articulated fashion via the connecting rod to the crankshaft. At least one actuator shaft is arranged coaxially with respect to the crankshaft, by which actuator shaft the eccentric can be rotated relative to the crank pin by driving the actuator shaft. As a result, the compression ratio of the cylinder can be adjusted. An actuator element, by which the actuator shaft can be driven, is arranged at one end of the crankshaft and adjoins the actuator shaft in the axial direction of the crankshaft. 1. A crank drive for a reciprocating piston engine , comprising:a crankshaft having at least one crankpin journal;at least one eccentric arranged rotatably on the crankpin journal and via which a connecting rod is mounted rotatably on the crankpin journal, by which connecting rod a piston arrangeable so as to move translationally in a cylinder having a variable compression ratio is couplable to the crankshaft in an articulated manner;at least one actuating shaft arranged coaxially with respect to the crankshaft and via which the eccentric is rotatable relative to the crankpin journal by driving the actuating shaft, as a result of which the compression ratio of the cylinder is settable; andan actuator by which the actuating shaft is driven, whereinthe actuator is arranged at one end of the crankshaft and adjoins the crankshaft in an axial direction of the crankshaft.2. The crank drive according to claim 1 , whereinthe actuating shaft penetrates at least one main bearing journal of the crankshaft completely in the axial direction of the crankshaft.3. The crank ...

ACTUATOR FOR VARIABLE COMPRESSION RATIO MECHANISM OF INTERNAL COMBUSTION ENGINE

Provided is an actuator for a variable compression ratio mechanism of an internal combustion engine, which improves productivity. The actuator for a variable compression ratio mechanism of an internal combustion engine includes an electric motor; a control shaft to which a rotative force from the electric motor is transmitted, the control shaft including a first journal portion and a second journal portion; an arm link portion that is disposed between the first journal portion and the second journal portion in an axial direction and extends from the control shaft in a radial direction, where the axial direction is a direction along a rotational axis line of the control shaft, and the radial direction is a radiation direction of the rotational axis line, the arm link portion being linked to the variable compression ratio mechanism of the internal combustion engine; a first housing including an accommodation chamber that accommodates the arm link portion, a radial opening portion that opens from the accommodation chamber in the radial direction, and a first opening portion that opens from the accommodation chamber toward the first journal portion side in the axial direction; and a second housing that closes the first opening portion, the second housing including a first bearing portion that supports the first journal portion. 1. An actuator for a variable compression ratio mechanism of an internal combustion engine comprising:an electric motor;a control shaft to which a rotative force from the electric motor is transmitted, the control shaft including a first journal portion and a second journal portion;an arm link portion that is arranged between the first journal portion and the second journal portion in an axial direction and extends from the control shaft in a radial direction, where the axial direction is a direction along a rotational axis line of the control shaft, and the radial direction is a radiation direction of the rotational axis line, the arm link ...

VARIABLE COMBUSTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

A variable combustion system for an internal combustion engine, which suppresses mechanical compression ratio change control by a variable mechanical compression ratio control mechanism and carries out internal EGR amount change control by a variable valve actuating control mechanism on a preferential basis in a first operating region in which a compression self-ignition combustion is carried out, and which suppresses the internal EGR amount change control by the variable valve actuating control mechanism and carries out the mechanical compression ratio change control by the variable mechanical compression ratio control mechanism on a preferential basis in a second operating region in which a spark ignition combustion is carried out. 1. A variable combustion system for an internal combustion engine , comprising:a variable valve actuation control mechanism configured to control an internal EGR amount to a combustion chamber of an internal combustion engine;a variable mechanical compression ratio control mechanism configured to control a mechanical compression ratio in the combustion chamber; anda control device configured to switch a combustion form of a mixture in the combustion chamber of the internal combustion engine to any one of compression self-ignition combustion and spark ignition combustion and to control the variable valve actuating control mechanism and the variable mechanical compression ratio control mechanism,wherein the control device suppresses mechanical compression ratio change control by the variable mechanical compression ratio control mechanism and carries out internal EGR amount change control by the variable valve actuating control mechanism on a preferential basis in a first operating region in which the compression self-ignition combustion is carried out, andthe control device suppresses the internal EGR amount change control by the variable valve actuating control mechanism and carries out the mechanical compression ratio change control by ...

Internal combustion engine control device and control method

A target compression ratio ε(t+Tact) after a prescribed time Tact has expired from a current point of time is calculated from an intake air volume drawn into a cylinder after expiration of the prescribed time Tact from the current point of time. A control command to an electric motor that drives a variable compression ratio mechanism is calculated so as to bring an actual compression ratio εr(t+Tact) after the prescribed time Tact into accordance with the target compression ratio ε(t+Tact) after the prescribed time Tact. This enables the actual compression ratio to follow the target compression ratio accurately.

SWITCH VALVE FOR CONTROLLING A HYDRAULIC FLUID FLOW AND CONNECTING ROD FOR A VARIABLE COMPRESSION INTERNAL COMBUSTION ENGINE WITH A SWITCH VALVE

A switch valve for controlling a hydraulic fluid flow, the switch valve comprising a tapping element that is arranged in a valve housing, wherein the tapping element is displaceable into a first switching position or a second switching position and interlockable by a spring loaded interlocking element in the first switching position or the second switching position, wherein a first hydraulic connection is connected with a relief connection in the first switching position and a second hydraulic connection is connected with the relief connection in the second switching position, wherein a switching travel of the tapping element is limited, wherein the interlocking element is at least partially arranged in a recess of the tapping element, wherein the valve housing includes a first groove that is oriented in an axial direction of the valve housing and limited in the axial direction. 1. A switch valve for controlling a hydraulic fluid flow , the switch valve comprising:a tapping element that is arranged in a valve housing,wherein the tapping element is displaceable into a first switching position or a second switching position and interlockable by a spring loaded interlocking element in the first switching position or the second switching position,wherein a first hydraulic connection is connected with a relief connection in the first switching position and a second hydraulic connection is connected with the relief connection in the second switching position,wherein a switching travel of the tapping element is limited,wherein the interlocking element is at least partially arranged in a recess of the tapping element,wherein the valve housing includes a first groove that is oriented in an axial direction of the valve housing and limited in the axial direction,wherein the interlocking element is arranged axially displaceable in the first groove by the tapping element, andwherein the interlocking element cooperates with an interlocking pin which is arranged in the valve ...

LINK MECHANISM ACTUATOR FOR INTERNAL COMBUSTION ENGINE

Provided is an actuator for a link mechanism for an internal combustion engine, which is capable of enhancing the durability of a wave gear type speed reducer or a bearing portion. The actuator for a link mechanism for an internal combustion engine according to the present invention includes: a housing including a bearing portion configured to support a control shaft so that the control shaft is rotatable; and the wave gear type speed reducer configured to reduce a rotation speed of an output shaft connected to a drive motor, and to transmit the reduced rotation speed to the control shaft. A restricting mechanism is provided to one of the control shaft and the housing, and is configured to restrict movement of the control shaft toward the wave gear type speed reducer side in an axial direction by being brought into contact with another of the control shaft and the housing. 1. An actuator for a link mechanism for an internal combustion engine , the actuator comprising:a control shaft, which is to be coupled to the link mechanism for an internal combustion engine, and is configured to change a posture of the link mechanism through rotation;a housing including a bearing portion configured to rotatably support the control shaft;a drive motor configured to rotationally drive an output shaft;a wave gear type speed reducer configured to reduce a rotation speed of the output motor, and to transmit the reduced rotation speed to the control shaft; anda restricting mechanism, which is provided to one of the control shaft and the housing, and is configured to restrict movement of the control shaft toward the wave gear type speed reducer side in the axial direction by being brought into contact with another of the control shaft and the housing.2. An actuator for a link mechanism for an internal combustion engine according to claim 1 ,wherein the control shaft includes an arm to be coupled to the link mechanism,wherein the housing has a recessed portion that is capable of ...

CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control method for an internal combustion engine which includes a variable compression ratio mechanism: controlling the compression ratio by using a control target compression ratio whose a variation amount per unit time is limited to be equal to or smaller than a predetermined variation amount threshold value; and setting a first variation amount threshold value which is the variation amount threshold value of the control target compression ratio per unit time toward a high compression ratio side, to be smaller than a second variation amount threshold value which is the variation amount threshold value of the control target compression ratio per unit time toward a low compression ratio side. 1: A control method for an internal combustion engine which includes a variable compression ratio mechanism which is arranged to vary a compression ratio , and in which a target compression ratio is varied at the variation of the compression ratio so that an actual compression ratio cannot follow the target compression ratio , the control method comprising:controlling the compression ratio by using a control target compression ratio whose a variation amount per unit time is limited to be equal to or smaller than a predetermined variation amount threshold value, and which is varied so that a difference between the control target compression ratio and the actual compression ratio is smaller than a difference between the target compression ratio and the actual compression ratio, in place of the target compression ratio; andsetting a first variation amount threshold value which is the variation amount threshold value of the control target compression ratio toward a high compression ratio side, to be smaller than a second variation amount threshold value which is the variation amount threshold value of the control target compression ratio toward a low compression ratio side.23-. (canceled)4: The control method for the internal combustion engine as claimed in claim 1 , wherein the ...

Variable compression ratio piston machine and method for adjusting the variable compression ratio piston machine

The present invention relates, in particular, to a variable compression ratio (VCR) piston machine comprising a crankshaft, at least one connecting rod, which is rotatably mounted on the crankshaft, wherein the connecting rod has a small bearing eye and a large bearing eye, and wherein the connecting rod has a connecting rod shaft, further comprising a compression piston, which is arranged on the connecting rod, preferably a combustion chamber piston which can be adjusted by means, for example, of an eccentric or some other adjusting element and of an adjustment system, preferably an adjustment linkage, wherein the adjustment system is supported by means of at least one support piston, which can be moved in a support cylinder of the connecting rod. A proposal is furthermore made for a method in which an adjustment accomplished by external forces acting on the adjustment system is supplemented or improved by additional adjustment forces.

VARIABLE COMPRESSION RATIO ENGINE WITH MECHANICAL LOCKING PIN

Methods and systems are provided for a VCR engine. In one example, the VCR engine includes a VCR mechanism that relies on electric power to adjust a compression ratio of the VCR engine. The compression ratio is maintained by hydraulically-assisted engagement of a mechanical locking pin with an S-link of the VCR mechanism, holding a position of the VCR mechanism while an electric motor, used to adjust a position of the S-link, may be deactivated. 1. A variable compression ratio (VCR) mechanism comprising;an S-link including a plurality of apertures and coupled to a control shaft and attached to an electric motor;a locking pin configured to alternate between a first position and a second position, the locking pin inserted through an aperture of the plurality of apertures when in the first position; anda hydraulic device configured to selectively maintain the locking pin in the first position.2. The VCR mechanism of claim 1 , wherein the electric motor actuates a translational motion of the S-link and the translational motion is converted into rotational movement of the control shaft.3. The VCR mechanism of claim 1 , wherein the plurality of apertures of the S-link are through-holes extending entirely through a thickness of the S-link and disposed along a length of the S-link claim 1 , the length perpendicular to the thickness and parallel with a direction of the translational motion of the S-link.4. The VCR mechanism of claim 3 , wherein when the locking pin is moved into the first position claim 3 , a first end of the locking pin is inserted through the aperture and into a non-moving component of a structure housing the VCR mechanism.5. The VCR mechanism of claim 4 , wherein when the locking pin is in the second position claim 4 , the locking pin is not engaged with the aperture and the locking pin is positioned within an oil chamber of the hydraulic device.6. The VCR mechanism of claim 5 , wherein when the locking pin is in the first position claim 5 , a spring in ...

Control Device and Control Method for Vehicle Drive Mechanism

The present invention relates to a control device and to a control method for a vehicle drive mechanism including a moving body having a movability range regulated by two stoppers, and a sensor which senses a position of the moving body. The control device of the present invention learns an output of the sensor corresponding to a contact state of a high-rigidity stopper, and limits, to a lower level, an operation variable of the actuator for moving the moving body toward a low-rigidity stopper along with an increase in an amount of change in the output of the sensor from the contact state of the high-rigidity stopper. Then, the control device learns the output of the sensor corresponding to the contact state of the low-rigidity stopper, and controls the actuator based on the output of the sensor learned at both the stopper positions. 1. A control device for a vehicle drive mechanism including a moving body which is movably supported , two stoppers , each of which defines an end of a movability range of the moving body , an actuator which drives the moving body in a moving direction , and a sensor which senses a position of the moving body , the control device comprising:a learning unit that learns an output of the sensor corresponding to a contact state of each of the two stoppers,wherein the learning unit executes learning for a first stopper of the two stoppers prior to learning for a second stopper of the two stoppers, the first stopper having a higher rigidity than the second stopper,wherein, while the moving body is brought into contact with the first stopper, an operation variable of the actuator is limited so as not to exceed a first upper limit value,wherein, while the moving body is brought into contact with the second stopper, the operation variable is limited so as not to exceed a second upper limit value, which is lower than the first upper limit value, andwherein, while the moving body rebounds off the second stopper and moves toward the first stopper, ...

POSITIONING THE SWITCHING ELEMENT FOR A MECHANICALLY SWITCHED VCR CONNECTING ROD

The invention relates to an internal combustion engine having an adjustable variable compression ratio, a crankshaft having a crankshaft center line and at least one counterweight, which has an extent with a maximum distance from the crankshaft center line, at least one connecting rod, an adjusting mechanism for adjusting the adjustable variable compression ratio, a switchover element for switching the adjusting mechanism, wherein the switchover element is arranged on the connecting rod, and an actuating element for switching over the switchover element from a first position, which corresponds to a first compression ratio, into a second position. 1. A reciprocating piston engine , in particular an internal combustion engine , having a variable compression ratio , comprising:a housing;a crankshaft rotatably mounted on the housing and having at least one crankpin and a balance weight, the outer circumferential contour of the crankshaft which is radially furthest away from the crankshaft center line describes an orbital path when the crankshaft rotates;a compression piston which is supported by a connecting rod and is guided in such a way as to be movable bidirectionally within a cylinder formed in the housing;an adjusting mechanism which is arranged on the connecting rod for adjusting a compression ratio by selectively releasing and/or blocking and/or assisting a movement of the compression piston relative to the connecting rod;a switch which is arranged on and/or in the connecting rod having a switchover element which can be actuated, in particular mechanically, for transferring the switch out of a first switching position, which corresponds to a first compression ratio, into at least one second switch position, which corresponds to a second compression ratio different from the first compression ratio, and vice versa; and wherein the connecting rod has, in the region around a crankshaft connecting-rod bearing, a connecting rod portion which, during a revolution of ...

Variable compression ratio device

The present invention relates to an electromechanical device for incorporation into the design and manufacture of internal combustion engines, which comprises the joining of two specific mechanisms, the first being an elaborate mechanism, called the cam actuator, which makes it possible, through the movement of these cams, to alter, under the control of an electronic control unit, the relative position of the crankshaft with respect to the top dead center of the pistons, inside the cylinder, increasing or decreasing the compression ratio according to the requirements of the engine. The second mechanism is the rotational coupler, formed by an internally-toothed gear, the ring gear, and a shaft with external gear teeth, the sprocket, to be applied at one or both ends of the crankshaft of the engines.

CONTROL METHOD OF VARIABLE STROKE ENGINE FOR REFORMING HIGH-OCTANE FUEL UNDER THE FLEXIBLE CYLINDER ENGINE (FCE) MODE

The present invention discloses a control method of variable stroke engine for reforming high-octane fuel under the FCE mode, the ECU connected to the engine controls the amount of fuel injected from the flexible cylinder injector to the flexible cylinder and controls the switch state of inlet valve and exhaust valve of the flexible cylinder, so that the flexible cylinder can be switched between two-stroke mode and four-stroke mode according to the actual engine operating conditions; when the engine is at a small load and needs to promote combustion stability, the flexible cylinder injector injects a rich fuel with equivalence ratio greater than 1 into the flexible cylinder, the flexible cylinder is at two-stroke mode; when the engine is at a large load and needs sufficient power output, the flexible cylinder injector injects a conventional fuel into the flexible cylinder, said flexible cylinder is at four-stroke mode. 1. A control method of variable stroke engine for reforming high-octane fuel under a flexible cylinder engine (FCE) mode , wherein{'b': 7', '8, 'the variable stroke engine comprises an air inlet system, a plurality of working cylinders () and at least one combustion flexible cylinder ();'}{'b': 13', '12', '9', '12', '21', '9, 'the air inlet system comprises a turbine (), a supercharger (), a main air inlet pipe () connected to the supercharger (), and a three-way air inlet valve () provided on the main air inlet pipe ();'}{'b': 9', '21', '2', '1', '9', '2', '2', '1, 'the main air inlet pipe () is divided into two ways via the three-way air inlet valve (), one is a working cylinder air inlet pipe (), the other is a flexible cylinder air inlet pipe (), a working loop is arranged between the main air inlet pipe () and the working cylinder air inlet pipe (), and a fuel reforming loop is arranged between the working cylinder air inlet pipe () and the flexible cylinder air inlet pipe ();'}{'b': 1', '19', '8', '17', '8', '18', '20', '3', '18', '20', '8', '3, ...

HYDRAULIC ARRANGEMENT WITH A SWTICH VALVE FOR CONTROLLING A HYDRAULIC FLUID FLOW OF A CONNECTING ROD FOR AN INTERNAL COMBUSTION ENGINE WITH VARIABLE COMPRESSION AND CONNECTING ROD

A hydraulic arrangement including a switch valve configured to control a hydraulic fluid flow of a connecting rod of an internal combustion engine with variable compression including an eccentrical element adjustment device for adjusting an effective connecting rod length, wherein the eccentrical element adjustment device includes at least a first cylinder and a second cylinder forming hydraulic chambers, wherein a first inlet is provided for feeding hydraulic fluid into the first cylinder through a supply conduit, wherein a second inlet is provided for feeding hydraulic fluid into the second cylinder through the supply conduit, wherein a first outlet is provided for draining hydraulic fluid from the first cylinder, wherein a second outlet is provided for draining hydraulic fluid from the second cylinder, wherein the switch valve includes a displaceable piston which is displaceable into a first switching position or a second switching position. 1. A hydraulic arrangement , comprising:a switch valve configured to control a hydraulic fluid flow of a connecting rod of an internal combustion engine with variable compression including an eccentrical element adjustment device for adjusting an effective connecting rod length,wherein the eccentrical element adjustment device includes at least a first cylinder and a second cylinder forming hydraulic chambers,wherein a first inlet is provided for feeding hydraulic fluid into the first cylinder through a supply conduit,wherein a second inlet is provided for feeding hydraulic fluid into the second cylinder through the supply conduit,wherein a first outlet is provided for draining hydraulic fluid from the first cylinder,wherein a second outlet is provided for draining hydraulic fluid from the second cylinder,wherein the switch valve includes a displaceable piston which is displaceable into a first switching position or a second switching position,wherein the first outlet of the first cylinder is connected with the supply conduit ...

Control Device and Control Method for Internal Combustion Engine

A control device for an internal combustion engine including a variable compression ratio mechanism for changing a compression ratio by using an electric actuator prohibits control of changing the compression ratio to a higher compression ratio when a failure occurs in the variable compression ratio mechanism. Thereby, upon failure occurrence, the compression ratio of the variable compression ratio mechanism at the time of the failure occurrence is maintained or reduced to less than this compression ratio so as to protect the electric actuator and prevent abrupt changes in torque. 114.-. (canceled)15. A control device for an internal combustion engine including a variable compression ratio mechanism for changing a compression ratio by using an electric actuator , whereinwhen a failure occurs in the variable compression ratio mechanism, the control device prohibits control of changing the compression ratio to a higher compression ratio, andthe control device stops current supply to the electric actuator when a drive current for the electric actuator is not reduced by a predetermined value after the control of changing the compression ratio to a higher compression ratio is prohibited.16. The control device for the internal combustion engine according to claim 15 , wherein the control device stops the current supply to the electric actuator when a condition in which the drive current for the electric actuator is not less than a predetermined value continues for a first predetermined time after the control of changing the compression ratio to a higher compression ratio is prohibited.17. The control device for the internal combustion engine according to claim 16 , wherein the control device controls the compression ratio in accordance with an operating condition of the internal combustion engine claim 16 , when claim 16 , after the drive current for the electric actuator falls below the predetermined value before the first predetermined time elapses after the control of ...

CLIP-FASTENED RACEWAY FOR A VARIABLE COMPRESSION RATIO ENGINE

A clip-fastened raceway for a variable compression ratio engine includes: at least one curved segment whose outer surface cooperates with a raceway housed in the transmission member or in the control member of the variable compression ratio engine and whose inner surface is maintained in contact with a curved outer surface housed in the toothed wheel of the engine; at least one clip, housed in at least one of the ends of the curved segment and fastened to one or the other of the ends of the curved outer surface housed in the toothed wheel and hooking onto a hook or protrusion which the wheel includes in the vicinity of the end of its curved outer surface, the hook or protrusion being complementary to that of the clip so as to be able to cooperate with the latter. 1. A clip-fastened raceway for a variable compression ratio engine , said engine comprising a cylinder case receiving a transmission member provided with a rack , to which are fastened a combustion piston , a control member provided with a rack and connected to a hydraulic double-acting control actuator , a toothed wheel which cooperates with the transmission member , and with the control member to transmit the mechanical work produced by the combustion on the combustion piston by a connecting rod connected to a crankshaft , the raceway comprising:at least one curved segment having an outer surface which cooperates with a raceway housed in the transmission member or in the control member of the variable compression ratio engine, the curved segment having an inner surface which is maintained in contact with a curved outer surface housed in the toothed wheel of said engine;at least one clip, housed in at least one end of the curved segment and fastened to one or other of ends of the curved outer surface housed in the toothed wheel and hooking onto a hook or protrusion which said wheel comprises in a vicinity of said end of the curved outer surface, said hook or protrusion being complementary to the at least ...

COMBUSTION CHAMBER ELASTICITY DEVICE

An energy storage device is provided for a combustion chamber of an internal combustion engine. The energy storage device includes first and second end connectors connected to respective ones of a piston and crankshaft, and a flexible connection rod portion rotatably connected with the first and second end connectors. The flexible connection rod portion elastically buckles above a predetermined cylinder pressure threshold to store combustion energy and provide a more constant pressure combustion process. 1. A device for connecting a piston and a crankshaft of an internal combustion engine , comprising:a first end connector for connection with the piston;a second end connector for connection with the crankshaft; anda connection rod portion including an elongated flexible body extending between a first end rotatably connected to the first end connector and a second end rotatably connected to the second end connector.2. The device of claim 1 , wherein:the connection rod portion includes a first shaped portion at the first end of the connection rod portion and a second shaped portion at the second end of the connection rod portion; andeach of the first and second end connectors includes a correspondingly shaped receptacle for receiving respective ones of the first and second shaped portions.3. The device of claim 2 , wherein the first and second shaped portions include one of a spherical shape and a cylindrical shape.4. The device of claim 2 , wherein each of the first and second portions includes a fiat or profiled surface at a terminal end of the connection rod portion.5. The device of claim 2 , wherein each of the first and second end connectors includes an end surface facing the other of the first and second end connectors claim 2 , and wherein each of the shaped receptacles includes chamfered surfaces defining an opening into the shaped receptacle at the end surface of the respective one of the first and second end connectors.6. The device of claim 2 , further ...

INTERNAL COMBUSTION ENGINE CONTROL METHOD AND CONTROL DEVICE

A control method for an internal combustion engine is arranged to vary an engine compression ratio, and includes a control mechanism arranged to control the engine compression ratio, and a driving source arranged to drive the control mechanism. The control method includes converting an operation amount of the driving source in accordance with an attenuation rate according to the engine compression ratio, transmitting the converted operation amount to the control mechanism, and controlling the cylinder pressure based on a basic ignition timing when the attenuation rate is relatively large, and controlling the cylinder pressure based on an allowable ignition timing retarded from the basic ignition timing when the attenuation rate is relatively small. 1. A control method for an internal combustion engine which is arranged to vary an engine compression ratio , and which includes a control mechanism arranged to control the engine compression ratio , and a driving source arranged to drive the control mechanism , the control method comprising:converting an operation amount of the driving source in accordance with an attenuation rate according to the engine compression ratio;transmitting the converted operation amount to the control mechanism; andcontrolling the cylinder pressure based on a basic ignition timing when the attenuation rate is relatively large, and controlling the cylinder pressure based on an allowable ignition timing retarded from the basic ignition timing when the attenuation rate is relatively small.2. The control method for the internal combustion engine as claimed in claim 1 , wherein the attenuation rate at a predetermined middle compression ratio is set to be smaller than the attenuation rates at a high compression rate higher than the middle compression rate claim 1 , and at a low compression rate lower than the middle compression rate.3. The control method for the internal combustion engine as claimed in claim 1 , wherein the allowable cylinder ...

METHOD AND DEVICE FOR DIAGNOSING A VARIABLE SETTING OF A COMPRESSION RATIO IN A RECIPROCATING INTERNAL COMBUSTION ENGINE

A method for diagnosing a variable setting of a compression ratio in a reciprocating internal combustion engine, an error of the variable setting of the compression ratio, being signaled as a function of a measured state variable of the exhaust gas system, in particular a measured exhaust gas temperature. 111-. (canceled).12. A method for diagnosing a variable setting of a compression ratio in a reciprocating internal combustion engine , the method comprising:signaling an error of the variable setting of the compression ratio as a function of a measured exhaust gas state variable of the exhaust discharge system.13. The method of claim 12 , further comprising:measuring the exhaust gas state variable in a determined or instantaneous compression ratio in a predefined operating state;modeling the exhaust gas state variable for the determined or instantaneous compression ratio in the predefined operating state; andsignaling the error of the variable setting of the compression ratio as a function of a difference between the measured exhaust gas state variable and the modeled exhaust gas state variable.14. The method of claim 13 , wherein the exhaust gas state variable corresponds to an exhaust gas temperature claim 13 , wherein the exhaust gas temperature is modeled for the determined or instantaneous compression ratio in the predefined operating state based on a predefined exhaust gas temperature model claim 13 , the exhaust gas temperature model including at least one of the following parameters as input variables:an ignition angle or an ignition point;an engine speed;an air charge;an air-fuel ratio in the cylinders of the internal combustion engine;an exhaust gas mass flow;an ambient temperature;an ambient pressure;a cooling rate of the exhaust gas between exit from the exhaust valve and the temperature sensor; andthe determined or instantaneous compression ratio.15. The method of claim 12 , further comprising:measuring the exhaust gas state variables measured at a ...

FILTER ELEMENT FOR A CONNECTING ROD AND CONNECTING ROD FOR AN INTERNAL COMBUSTION ENGINE WITH VARIABLE COMPRESSION

A filter element for a connecting rod including an eccentrical element adjustment arrangement for adjusting an effective connecting rod length, the filter element comprising a bushing that is flowable by a hydraulic fluid along a fluid path; and at least one screen insert that is arranged in the fluid path of the bushing. The invention also relates to a connecting rod with at least one filter element. 1. A filter element for a connecting rod including an eccentrical element adjustment arrangement for adjusting an effective connecting rod length , the filter element comprising:a bushing that is flowable by a hydraulic fluid along a fluid path; andat least one screen insert that is arranged in the fluid path of the bushing.2. The filter element according to claim 1 , wherein the at least one screen insert is arranged at a face of the bushing.3. The filter element according to claim 1 , wherein the bushing includes a throttling location along the fluid path.4. The filter element according to claim 3 , wherein the throttling location is integrated into the bushing.5. A connecting rod for a variable compression internal combustion engine claim 3 , the connecting rod comprising:an eccentrical element adjustment arrangement for adjusting an effective connecting rod length, the eccentrical element adjustment arrangement including at least a first cylinder and a second cylinder, a first inlet for feeding hydraulic fluid into the first cylinders and a first outlet for draining the hydraulic fluid from the first cylinder and a second inlet for feeding hydraulic fluid into the second cylinder and a second outlet for draining the hydraulic fluid from the second cylinder;a hydraulic arrangement including at least one switch valve for controlling a hydraulic fluid flow of the connecting rod wherein the at least one switch valve includes a movable piston which is displaceable into a first switching or a second switching position, wherein the outlet of the first cylinder is ...

APPARATUS TO OPTIMIZE COMPRESSION

The apparatus is directed toward improving compression ratios relating to the crank angle positions, generating higher variable compression during the expansion cycle. An internal combustion engine is disclosed. This invention is directed toward retaining the highest compression ratio available during the expansion cycle without increased fuel consumption. The apparatus comprising of three basic components: a conventional and eccentric half of crank pin with radially displaced centerline section, two piston rods and an articulated connecting rod end. The piston is linked to this piston rod assembly. Applied dimensions of said components provide virtual infinite variations of compression curves. 1. A mechanical assembly for an internal combustion engine wherein said crankshaft is rotatable about a crankshaft axis and has a crank pin that orbits about said crank shaft axis , said crank shaft pin having a first crank pin section with a first diameter and second crank pin section with a second diameter , wherein said first diameter is different from said second diameter.2. A mechanical assembly according to . wherein said first crank pin section has a first axis that is offset from a second axis of second crank pin section and said second end of first connecting rod is connected to said first crank pin section and said second end of said second connecting rod is connected to said second crank pin section.3. A mechanical assembly according to claim 2 , wherein the crank pin section with the offset centerline being radially variable around the smaller diameter crank pin centerline as cast and ground claim 2 , also having a cast in lightening opening extending angularly toward pin center claim 2 , facilitating the positioning of the piston tops high and low cycle at the desired crank angle.4. A mechanical assembly according to claim 3 , wherein the larger cast crank pin section is replaceable by a detachable axially variable two part pin section to mate along a plane ...

COMPRESSION RATIO ADJUSTMENT APPARATUS FOR INTERNAL COMBUSTION ENGINE

An object of the present invention is to provide a variable mechanism apparatus for an internal combustion engine capable of preventing a crown surface of a piston and intake and exhaust valves from interfering with each other or sufficiently acquiring an internal EGR effect during an exhaust stroke when a piston position at a compression top dead center is raised to achieve a high mechanical compression ratio. The variable mechanism apparatus is configured to set a piston position at an intake (exhaust) top dead center to a lower position than the piston position at the compression top dead center by a variable compression ratio mechanism. According thereto, the variable mechanism apparatus can prevent the crown surface of the piston and the intake and exhaust valves from interfering with each other or sufficiently acquiring the internal EGR effect during the exhaust stroke by setting the piston position at the exhaust top dead center to the low position when the piston position at the compression top dead center is raised to achieve the high mechanical compression ratio. 1. A compression ratio adjustment apparatus for an internal combustion engine , comprising:a variable compression ratio mechanism capable of changing a mechanical compression ratio and a mechanical expansion ratio by changing a stroke position of a piston in a four-cycle internal combustion engine,wherein the variable compression ratio mechanism sets a piston position at an exhaust top dead center to a lower position than a piston position at a compression top dead center of the piston.2. The compression ratio adjustment apparatus for the internal combustion engine according to claim 1 , wherein the variable compression ratio mechanism sets the piston position at the exhaust top dead center to the lower position than the piston position at the compression top dead center of the piston throughout an entire variable range of the variable compression ratio mechanism.3. The compression ratio ...

VARIABLE COMPRESSION RATIO APPARATUS

A variable compression ratio apparatus may include an operating unit operated by hydraulic pressure to reciprocate the plunger, an oil control valve controlling hydraulic pressure supplied to the operating unit, an oil supplying unit storing oil supplied to the operating unit via the oil control valve and transmitting the stored oil to the oil control valve, an actuator operating the oil control valve, and a controller connected with the actuator to control the actuator according to an operational state of an engine. 1. A variable compression ratio apparatus changing a volume of a combustion chamber by an operation of a plunger configured to reciprocate in a space communicating with an interior of the combustion chamber according to an operational state of an engine , the apparatus includingan operating unit operated by hydraulic pressure to reciprocate the plunger,an oil control valve controlling the hydraulic pressure supplied to the operating unit,an oil supplying unit storing oil supplied to the operating unit via the oil control valve, and transmitting the stored oil to the oil control valve,an actuator operating the oil control valve, anda controller connected with the actuator to control the actuator according to the operational state of the engine.2. The apparatus of claim 1 , wherein the operating unit includesa hydraulic pressure cylinder formed in a hollow cylindrical shape of which one surface and another surface thereof are closed,a piston reciprocating along a length direction of the hydraulic pressure cylinder in a hollow of the hydraulic pressure cylinder, andan operating rod passing through at least one of the one surface and the another surface of the hydraulic pressure cylinder and connected to the piston and the plunger,wherein the operating rod integrally moves together with the piston and the plunger, andwherein the hollow of the hydraulic pressure cylinder is partitioned into a first chamber and a second chamber by the piston.3. The apparatus ...

DUAL-CRANKSHAFT, OPPOSED-PISTON ENGINE WITH MECHANICALLY UNCOUPLED CRANKSHAFTS

An opposed-piston engine with two crankshafts includes a first power transducer coupled to a first crankshaft of the two crankshafts and a second power transducer coupled to a second crankshaft of the two crankshafts. The two crankshafts are not rotatably connected, and so are free to rotate independently of each other. Phase relationships between the crankshafts may be controlled by operating the power transducers to increase, or reduce, crankshaft torque. Changes in crankshaft phase relationships cause changes in opposed piston locations, which, in turn, enable control of engine performance factors. 1. An opposed-piston engine device , comprising:an opposed-piston engine comprising a first crankshaft and a second crankshaft, configured to rotate independently of each other;a first power transducer operatively coupled to the first crankshaft;a second power transducer operatively coupled to the second crankshaft; and,a control mechanization configured to determine a rotation phase difference between the first and second crankshafts and to cause the first and second power transducers to change the rotation phase difference between the first and second crankshafts.2. The opposed-piston engine device of in which the control mechanization comprises:a first rotation sensor engaging the first crankshaft;a second rotation sensor engaging the second crankshaft; and, connected to receive signals from the first and second rotational sensors and configured to determine the rotation phase difference based on the signals received from the first and second rotational sensors; and,', 'connected to transmit signals to the first and second power transducer devices which cause the first and second power transducers to change the rotation phase difference., 'a control unit which is3. The opposed-piston engine device of in which the first and second power transducers each comprises an electric motor/generator device.4. The opposed-piston engine device of in which the change of the ...

METHOD AND SYSTEM FOR ENGINE CONTROL

Methods and systems are provided for coordinating cylinder deactivation adjustments with changes to individual cylinder piston displacement. In doing do, the benefits of variable displacement and variable compression ratio may be synergized. An engine can be operated with some cylinders deactivated while active cylinders operate with knock addressed while spark timing is at MBT for a longer duration. 1. A method for an engine , comprising:selectively deactivating one or more engine cylinders based on engine load; andadjusting a piston displacement to vary a compression ratio of active engine cylinders to maintain spark timing of the engine at a peak torque timing while maintaining the one or more cylinders deactivated.2. The method of claim 1 , wherein the adjusting includes claim 1 , while maintaining spark timing at the peak torque timing claim 1 , adjusting the piston displacement to reduce the compression ratio from a higher threshold compression ratio as an indication of knock increases.3. The method of claim 2 , further comprising claim 2 , reducing the compression ratio while maintaining the spark timing at the peak torque timing responsive to knock until a lower threshold compression ratio is reached claim 2 , and responsive to a further indication of knock claim 2 , retarding spark timing while maintaining the compression ratio at the lower threshold.4. The method of claim 3 , further comprising claim 3 , retarding spark timing responsive to the further indication of knock until a fuel usage amount is higher than a threshold amount claim 3 , and then reactivating a deactivated cylinder claim 3 , resuming spark timing at the peak torque timing in the active cylinders claim 3 , and raising the compression ratio of the active cylinders to or towards the higher threshold compression ratio.5. The method of claim 3 , wherein the adjusting includes claim 3 , retarding spark timing responsive to the further indication of knock until spark timing reaches a threshold ...

Control device and control method for internal combustion engine

At the time of increasing an actual intake air amount by increasing a valve overlap period of intake and exhaust valves ( 2; 3 ), an actual compression ratio is temporarily decreased to be lower than a steady-state target compression ratio. This makes it possible to increase the valve overlap period without causing interference of the intake and exhaust valves ( 2; 3 ) with a piston ( 8 ).

VARIABLE COMPRESSION RATIO ENGINE

A variable compression ratio engine includes: a piston; a piston bar which is connected to the piston; a first connecting link which is connected to the piston bar through a first joint; a main body which is connected to the first connecting link through a second joint and includes a third joint and a fourth joint; a crank shaft which includes a fifth joint; a second connecting link which is connected to the main body through the fourth joint and connected to the crank shaft through the fifth joint to rotate the crank shaft; and a control link which is connected to the main body through the third joint and selectively changes a position of the third joint. 1. A variable compression ratio engine , comprising:a piston;a piston bar which is connected to the piston;a first connecting link which is connected to the piston bar through a first joint;a main body which is connected to the first connecting link through a second joint and includes a third joint and a fourth joint;a crank shaft which includes a fifth joint;a second connecting link which is connected to the main body through the fourth joint and connected to the crank shaft through the fifth joint to rotate the crank shaft; anda control link which is connected to the main body through the third joint and selectively changes a position of the third joint,wherein the control link controls the third joint so that the third joint moves along a preset control line, andwherein the control line connects a position of the third joint at a preset maximum stroke of the engine with a preset control point at a position closer to the piston than a position of the first joint when the piston is positioned at a top dead center at the preset maximum stroke of the engine.2. The variable compression ratio engine of claim 1 , wherein:a distance between the first joint and the second joint is equal to a distance between the second joint and the third joint.3. (canceled)4. The variable compression ratio engine of claim wherein:in a ...

MOVABLE FULCRUM FOR DIFFERENTIAL AND VARIABLE-STROKE CYCLE ENGINES

An engine includes an engine shaft configured to rotate and cause one or more pistons to reciprocate within a cylinder chamber along an axis, each piston having a first piston part and piston stem to move in unison with or separately from a second piston part to define piston strokes for different thermal functions of the engine. The engine further includes a piston lever having a first end coupled to a movable fulcrum point and a second end coupled at a copy point to the piston stem, an actuation mechanism configured to move the piston lever and thereby the copy point, and a guide apparatus configured to dictate movement of the copy point in a direction substantially parallel to the cylinder axis. 1. An engine having an engine shaft configured to rotate and cause one or more pistons to reciprocate within a cylinder chamber along an axis , each piston having a first piston part and piston stem to move in unison with or separately from a second piston part to define piston strokes for different thermal functions of the engine , the engine comprising:a piston lever having a first end coupled to a movable fulcrum point and a second end coupled at a copy point to the piston stem;an actuation mechanism configured to move the piston lever and thereby the copy point; anda guide apparatus configured to dictate movement of the copy point in a direction substantially parallel to the cylinder axis,wherein the movable fulcrum comprises a roller or a slider moveable within the guide apparatus such that the movable fulcrum point is configured to move in a direction substantially perpendicular with the cylinder axis.2. The engine of claim 1 , wherein the actuation mechanism comprises a cam follower claim 1 , coupled to the piston lever claim 1 , configured to engage and travel on a mating engine cam profile to operate the piston lever.3. The engine of claim 2 , further comprising a return mechanism configured to bias the piston lever in a direction substantially opposite the ...

VARIABLE COMPRESSION RATIO RECIPROCATING PISTON ENGINE

Reciprocating-piston machine (), in particular a combustion machine, with a variable compression ratio, having 1. The reciprocating-piston machine , in particular a combustion machine , with a variable compression ratio , comprisingan adjustment for adjusting the compression ratio,having a sensor device for detecting the compression ratio,and having a controller which is designed to repeatedly activate the adjustment device if a deviation of a detected compression ratio from a setpoint compression ratio exists.2. The reciprocating-piston according to claim 1 , wherein claim 1 , for the purposes of repeating the activation of the adjustment device claim 1 , the controller is designed such that the compression ratio is initially changed over into the original state and is switched back after a period of time.3. The reciprocating-piston machine according to claim 2 , wherein the adjustment device comprises a slide claim 2 , regulator or a rotary element claim 2 , for which a multiplicity of setpoint positions claim 2 , in particular exactly two setpoint positions claim 2 , are provided claim 2 , and a deviation of a setpoint position and an actual position of the slide claim 2 , regulator or rotary element is the cause of a deviation of a detected compression ratio from the setpoint compression ratio.4. The reciprocating-piston machine according to claim 1 , characterized in that the adjustment device comprises a switchover element being either claim 1 , a connecting rod or a crankshaft claim 1 , which is arranged on a movable part of the reciprocating-piston machine claim 1 , and at least one actuating element is movable relative to the switchover element in order to thus vary the position of the switchover element.5. The reciprocating-piston machine according to claim 4 , characterized in that an adjustment travel is provided during the switchover of the switchover element claim 4 , and positive guidance is provided for a first part of an adjustment travel claim 4 , ...

CONTROL DEVICE FOR DIRECT FUEL INJECTION ENGINE AND CONTROL METHOD THEREOF

In a first region on a low load side of an operation region of a direct fuel injection engine, homogenous combustion is performed, while, in a second region of the operation region on a load side higher than the first region, stratified combustion is performed. In the stratified combustion, a fuel is dispersed in a cylinder by a first injection operation and a fuel is unevenly distributed in a vicinity of the ignition plug by a second injection operation. Shift control by the stratified combustion is executed at a time of shifting when an operation state of the engine has shifted from the first region to the second region, and in the shift control, a fuel in an amount larger than a target amount of the second injection operation in the second region is injected by the second injection operation and then, an injection amount of the second injection operation is decreased toward the target amount. 111.-. (canceled)12. A control method of a direct fuel-injection spark ignition engine including an ignition plug and a fuel injection valve arranged to be capable of injecting a fuel directly in a cylinder , whereinin a first region on a low load side of an operation region of the engine, homogenous combustion is performed, while, in a second region of the operation region on a load side higher than the first region, stratified combustion is performed, in stratified combustion the a fuel is dispersed in a cylinder by a first injection operation of the fuel injection valve and a fuel is unevenly distributed in a vicinity of the ignition plug by a second injection operation of the fuel injection valve;shift control by the stratified combustion is executed at a time of shifting the operation region when an operation state of the engine has shifted from the first region to the second region; andin the shift control, a fuel in an amount larger than a target amount of the second injection operation in the second region is injected in the second injection operation by controlling ...

LENGTH-ADJUSTABLE CONNECTING ROD WITH A CYLINDER-PISTON ASSEMBLY WITH AN OIL FILTER

A length-adjustable connecting rod for an internal combustion engine, comprises a first connecting rod member, a second connecting rod member and at least one cylinder-piston assembly for adjusting the first connecting rod member relative to the second connecting rod member. The cylinder-piston assembly can be actuated by way of a hydraulic adjustment mechanism, where the hydraulic adjustment mechanism comprises at least one oil filter in order to filter the engine oil of the internal combustion engine flowing into the cylinder-piston assembly. The invention further relates to an internal combustion engine with such a length-adjustable connecting rod and the use of such a cylinder-piston assembly for a length-adjustable connecting rod of an internal combustion engine. 1. A length-adjustable piston rod for an internal combustion engine , in particular a spark ignition engine , with a first connecting rod member and a second connecting rod member , said first connecting rod member comprising a connecting rod small end for receiving a piston pin and said second connecting rod member comprising a connecting rod large end for receiving a crankshaft journal , where said first connecting rod member is movable relative to said second connecting rod member in order to adjust the distance between said connecting rod large end and said connecting rod small end , and with at least one cylinder-piston assembly for moving said first connecting rod member relative to said second connecting rod member , where said cylinder-piston assembly is actuatable by use of a hydraulic adjustment mechanism ,wherein said hydraulic adjustment mechanism comprises at least one oil filter for filtering the engine oil of said internal combustion engine flowing into said cylinder-piston assembly.2. The length-adjustable connecting rod according to claim 1 ,wherein said cylinder-piston assembly comprises a cylinder bore, an adjustable piston arranged in a longitudinally movable manner in said cylinder ...

RECIPROCATING-PISTON MACHINE

The invention relates to a reciprocating-piston engine, in particular an internal combustion engine having a variable compression ratio with a length adjusting device which is arranged in a connecting rod and which can be activated by a switching unit arranged in the connecting rod, wherein an actuating mechanism is operatively connected to the switching unit in the region of a connecting rod bearing in order to introduce a switching pulse into the connecting rod. The actuating mechanism has a deflection element with at least one first force-application region and at least one second force-application region, and the first force-application region and the second force-application region can be selectively contacted with at least one actuating device. 1. An internal combustion engine , with a variable compression ratio , comprising:a connecting rod including a connecting rod bearing;a length adjusting device within the connecting rod;a switching unit, within the connecting rod, configured to activate the length adjusting device; 'a deflection element with at least one first force-application region and at least one second force-application region, the first force-application region and the second force-application region configured to selectively contact at least one actuating device.', 'an actuating mechanism operatively connected to the switching unit in the region of the connecting rod bearing, the actuating mechanism configured to introduce a switching pulse into the connecting rod, the actuating mechanism including'}2. The internal combustion engine of claim 1 , wherein the deflection element has a deflection lever.3. The internal combustion engine of claim 1 , wherein the deflection element is arranged on a connecting rod bearing bracket.4. The internal combustion engine of claim 1 , wherein the actuating device is arranged in a crankcase.5. The internal combustion engine of claim 3 , wherein the actuating mechanism further includes a transmission means ...

SYSTEM AND METHOD FOR VARIABLE COMPRESSION RATIO ENGINE

Methods and systems are provided for improving calibration of a variable compression ratio engine. Cylinder-to-cylinder compression ratio variations are detected and accounted for by comparing cylinder fuel flow and IMEP at each compression ratio setting. Dilution parameters including EGR and VCT schedule are also calibrated to account for the cylinder-to-cylinder compression ratio variations. 1. A method for an engine , comprising:calibrating a compression ratio schedule of a variable compression ratio engine based on each of fuel flow and peak torque of each cylinder at each compression ratio setting of the engine; andadjusting exhaust gas recirculation (EGR) flow to the engine in accordance with an updated EGR calibration schedule based on the compression ratio schedule calibration.2. The method of claim 1 , wherein the calibrating includes claim 1 , for each cylinder claim 1 , learning a difference between actual compression ratio and commanded compression ratio at each of a plurality of compression ratio settings.3. The method of claim 1 , wherein the adjusting includes:identifying an engine cylinder having a highest difference between actual compression ratio and commanded compression ratio, wherein the actual compression ratio is lower than the commanded compression ratio; andadjusting an EGR flow to the engine based on the actual compression ratio of the identified engine cylinder.4. The method of claim 1 , wherein the adjusting includes:identifying an engine cylinder having a lowest actual compression ratio; andadjusting an EGR flow to the engine based on the actual compression ratio of the identified engine cylinder.5. The method of claim 1 , wherein the adjusting in accordance with an updated EGR calibration schedule includes adjusting based on a lowest of a plurality of compression ratio settings of an individual cylinder of the engine.6. The method of claim 5 , wherein the adjusting further includes claim 5 , when engine load is lower than a threshold ...

INTERNAL-COMBUSTION ENGINE CONTROL METHOD AND CONTROL DEVICE

An internal-combustion engine includes a variable compression ratio mechanism for changing a mechanical compression ratio, and a variable valve timing mechanism for changing the valve timing of an intake valve. When acceleration is demanded, a target compression ratio is set to a lower compression ratio than the target value in a normal condition, and the valve timing is set to the advance angle side. Since the allowable combustion pressure decreases in a prescribed intermediate compression ratio region, if an actual compression ratio exists in the prescribed intermediate compression ratio region in the course of a compression ratio change accompanying acceleration, the variable compression ratio mechanism restricts the intake pressure by increasing a degree of opening of a wastegate valve or reducing a degree of opening of a throttle valve, for example. 110.-. (canceled)11. A control method for an internal combustion engine including a variable compression ratio mechanism that is structured to vary a mechanical compression ratio of the internal combustion engine , and has tolerance against combustion pressure wherein the tolerance is relatively low in a middle compression ratio region between a maximum compression ratio and a minimum compression ratio , the control method comprising:setting a target compression ratio of the variable compression ratio mechanism lower than a regular value of target compression ratio which is based on engine operation condition under steady state, in response to presence of a request for acceleration; andrestricting a maximum combustion pressure to be lower in a predetermined middle compression ratio region than in a high compression ratio region with respect to the predetermined middle compression ratio region, during process in which the variable compression ratio mechanism varies in compression ratio to reach the target compression ratio.12. The control method as claimed in claim 11 , wherein:the internal combustion engine further ...

Bearing structure for multi-link-type piston crank mechanism for internal combustion engines

A crankshaft bearing part ( 11 ) has a pair of main bearing metals ( 41 ), and lubricating oil is guided from an oil gallery to an inner circumferential oil groove ( 43 ) through an in-block oil passage ( 33 ) and a first oil hole ( 42 ). Some of the lubricating oil is supplied to a control shaft bearing part ( 17 ) via a second oil hole ( 44 ) and an in-cap oil passage ( 34 ). Lubricating oil is guided from a third oil hole ( 46 ) in a pair of control shaft bearing metals ( 45 ) to an inner circumferential oil groove ( 47 ). The oil groove ( 43 ) in the crankshaft bearing part ( 11 ) functions also as an oil passage for supplying lubricating oil to the control shaft bearing part ( 17 ), thereby achieving a simple configuration.

ADJUSTABLE-LENGTH CONNECTING ROD, RECIPROCATING PISTON ENGINE, AND VEHICLE

The invention relates to an adjustable-length connecting rod for a reciprocating piston engine, to a reciprocating piston engine, and to a vehicle, where an effective connecting rod length of the connecting rod can be changed, and the connecting rod has a hydraulic length adjustment device which has a hydraulic working chamber, a hydraulic duct, a valve recess with a valve recess longitudinal axis, and a valve device which is arranged in the valve recess and has a valve chamber, where the valve device is configured for opening and/or shutting of a hydraulic medium outflow from the hydraulic working chamber, and the hydraulic duct opens into the valve recess at an orifice opening in an inner wall section of the valve recess. The valve device has at least one closed outer wall section which lies opposite the orifice opening and surrounds the valve chamber of the valve device, where the outer wall section of closed configuration of the valve device configures a flow duct together with that inner wall section of the valve recess, where the flow duct is configured to divert hydraulic medium, which exits from the hydraulic duct with a first flow direction and enters into the valve recess, in a second flow direction which is different from the first flow direction before the entry into the valve chamber. 1. An adjustable-length connecting rod for a reciprocating piston engine , particularly for a reciprocating internal combustion engine , wherein an effective connecting rod length of the connecting rod can be changed , wherein the connecting rod comprises a hydraulic length adjustment device for changing the effective connecting rod length which comprises:at least one hydraulic working chamber;at least one hydraulic duct for discharging hydraulic medium from the hydraulic working chamber;at least one valve recess having a valve recess longitudinal axis; anda valve device comprising a valve chamber arranged in the valve recess;wherein the valve device is designed to open ...

LENGTH-ADJUSTABLE CONNECTING ROD WITH CONTROL DEVICE

A length-adjustable connecting rod for a reciprocating piston machine, which may be a reciprocating piston internal combustion engine, is disclosed as well as a reciprocating piston machine and a vehicle. The connecting rod comprises a hydraulic length-adjusting device for adjusting an effective connecting rod length and a control device that can switch between two switching states, for controlling the length-adjusting device. The length-adjusting device comprises a hydraulic cylinder with a piston and a first hydraulic working chamber and a second hydraulic working chamber, the control device comprising a first valve and a second valve, the first valve of the control device being connected to the first hydraulic working chamber of the length-adjusting device in a fluid-communicating manner, and the second valve to the second hydraulic working chamber, the first valve and the second valve each being actuatable by means of a hydraulically actuatable adjusting piston that can axially move along an adjusting axis, the adjusting axis of the first valve being different from the adjusting axis of the second valve. 1. A length-adjustable connecting rod for a reciprocating piston engine , comprising:a hydraulic length-adjusting apparatus for adjusting an effective connecting rod length of the connecting rod;a control device switchable between at least two switching states for controlling a lengthwise adjustment of the connecting rod;wherein the hydraulic length-adjusting apparatus comprises a hydraulic cylinder with a piston, a first hydraulic working chamber, and a second hydraulic working chamber;wherein the control device comprises a first valve and a second valve;wherein the first valve of the control device is connected to the first hydraulic working chamber of the hydraulic length-adjusting apparatus in a fluid-communicating manner and the second valve of the control device is connected to the second hydraulic working chamber of the hydraulic length-adjusting ...

APPARATUS FOR ADJUSTING THE LENGTH OF CONNECTING RODS IN AN INTERNAL COMBUSTION ENGINE

An apparatus for adjusting the length of connecting rods in an internal combustion engine, having a shift guide plate arrangement which has shift guide plates which can be adjusted in one spatial direction for actuating connecting rod actuating devices which are integrated into the connecting rods for the purpose of changing the length of the respective connecting rod. The shift guide plates are connected fixedly to a carrier frame. The carrier frame is mounted in a stationary oil scraper arrangement such that it can be displaced in the spatial direction. The oil scraper arrangement has oil scrapers for stripping oil from the connecting rods. 1. An apparatus for adjusting a length of connecting rods in an internal combustion engine , the apparatus comprising:a shift guide plate arrangement which has shift guide plates that are configured to be adjusted in one spatial direction for actuating connecting rod actuating means that are integrated into the connecting rods for the purpose of changing the length of the respective connecting rod,wherein the shift guide plates are fixedly connected to a carrier frame, the carrier frame being mounted in a stationary oil scraper arrangement such that the carrier frame is configured to be displaced in the spatial direction, and the oil scraper arrangement having oil scrapers for stripping oil from the connecting rods.2. The apparatus as claimed in claim 1 , wherein the apparatus is configured as a pre-assembled unit.3. The apparatus as claimed in claim 1 , wherein the oil scraper arrangement has a plurality of oil scrapers that are positioned in a movement region of the respective connecting rod claim 1 , and are arranged behind one another in a movement direction of the respective connecting rod.4. The apparatus as claimed in claim 1 , wherein the oil scraper arrangement is configured in one piece as a cast part.5. The apparatus as claimed in claim 1 , wherein the carrier frame is a one piece steel sheet metal part.6. The ...

Internal Combustion Engine

When a stopper portion is brought into abutment against body high-compression-ratio side stopper portion, when viewed in the control shaft axial direction, it is configured that the distance between body high-compression-ratio side stopper surface and control-shaft high-compression-ratio side stopper surface becomes relatively longer as being closer to the control shaft rotation center. Similarly, when a stopper portion is brought into abutment against body low-compression-ratio side stopper portion, when viewed in the control shaft axial direction, the distance between body low-compression-ratio side stopper surface and control-shaft, low-compression-ratio side stopper surface becomes relatively longer as being closer to the control shaft rotation center. 1. An internal combustion engine comprising a variable compression ratio mechanism that is capable of continuously varying compression ratio of the internal combustion engine according to rotational position of a control shaft , and a body-side stopper that limits rotation of the control shaft ,wherein the control shaft is equipped with a control-shaft-side stopper that is brought into abutment against the body-side stopper,wherein the control-shaft-side stopper has a control-shaft-side stopper surface that is brought into abutment against the body-side stopper,wherein the body-side stopper has a body-side stopper surface that is brought into abutment against the control-shaft-side stopper,wherein, when the control-shaft-side stopper is brought into abutment against the body-side stopper, a distance between the body-side stopper surface and the control-shaft-side stopper surface is configured to become relatively longer as being closer to a rotation center of the control shaft when viewed in an axial direction of the control shaft.2. The internal combustion engine as claimed in claim 1 , wherein the control-shaft-side stopper comprises a control-shaft claim 1 , high-compression-ratio side stopper portion that ...

SWITCHOVER VALVE UNIT AND INTERNAL COMBUSTION ENGINE HAVING A SWITCHOVER VALVE UNIT OF SAID TYPE

A switchover valve unit () for an internal combustion engine that has an adjustable compression ratio for controlling an hydraulic oil stream in hydraulic chambers () of an eccentric adjustment device. The hydraulic chambers () can be filled with hydraulic oil via hydraulic oil feed lines (), and ventilation of the hydraulic chambers () via hydraulic oil discharge lines () is permitted or not permitted depending on a switching position of the switchover valve unit (). The switchover valve unit () having an actuating module () with a linearly displaceable pick-off element (), a valve module () with ventilation valves () in the hydraulic oil discharge lines (), and actuating rods () that can be displaced linearly by the pick-off element (). The ventilation valves () are opened or closed depending on the switching position of the pick-off element (). 1. A switchover valve unit for an internal combustion engine that has an adjustable compression ratio , the switchover valve unit controlling a hydraulic oil stream in hydraulic chambers of an eccentric adjustment device so that the hydraulic chambers can be filled with hydraulic oil via hydraulic oil feed lines , and ventilation of the hydraulic chambers via hydraulic oil discharge lines being permitted or not permitted in a manner dependent on the switching position of the switchover valve unit , the switchover valve unit comprising:an actuating module with a linearly displaceable pick-off element;a valve module with ventilation valves assigned to the hydraulic oil discharge lines; andactuating rods that can be displaced linearly by the pick-off element of the actuating module and being disposed so that movement of the actuating rods opens the ventilation valves of the valve module or permits closure of the ventilation valves so that the hydraulic oil discharge lines are opened in a manner dependent on the switching position of the pick-off element.2. The switchover valve unit of claim 1 , wherein the actuating module ...

CHECK VALVE FOR CONNECTING ROD OF VARIABLE COMPRESSION INTERNAL COMBUSTION ENGINE AND CONNECTING ROD WITH CHECK VALVE

A check valve of a connecting rod of a variable compression internal combustion engine, the connecting rod including at least one hydraulic chamber, wherein the hydraulic chamber of the connecting rod is connectable by the check valve with a supply connection or with a tank, wherein the check valve includes a valve housing and a valve closure element that is axially moveable along a longitudinal valve axis between an open position and a closed position, wherein the valve closure element is preloaded against a valve seat by a valve spring, characterized in that a mandrel shaped support element is provided which penetrates through the valve spring and which supports the valve spring in the open position of the valve closure element and in the closed position of the valve closure element. The invention also relates to a connecting rod with at least one check valve. 1. A check valve for a connecting rod of a variable compression internal combustion engine , the connecting rod comprising:at least one hydraulic chamber,wherein the at least one hydraulic chamber of the connecting rod is connectable by the check valve with a supply connection or with a tank,wherein the check valve includes a valve housing and a valve closure element that is axially moveable along a longitudinal valve axis between an open position and a closed position,wherein the valve closure element is preloaded against a valve seat by a valve spring,wherein a mandrel shaped support element is provided which extends through the valve spring and which supports the valve spring in the open position of the valve closure element and in the closed position of the valve closure element.2. The check valve according to claim 1 , wherein the valve closure element is supported in the valve housing.3. The check valve according to claim 1 , wherein the mandrel shaped support element is fixated at the valve housing and configured insertable into the valve closure element.4. The check valve according to claim 1 , ...

CONTROL DEVICE FOR COMPRESSION RATIO VARIABLE INTERNAL COMBUSTION ENGINE

A control device for a compression ratio variable internal combustion engine is provided with a compression ratio variable mechanism for changing an engine compression ratio in accordance with a rotational position of a control shaft, and a detection unit that detects an actual compression ratio. In a predetermined engine operating condition such as immediately after an engine start, reference position learning operation for the detection unit is carried out with the control shaft mechanically locked up at a predetermined reference position. During operation of the engine, even when the actual compression ratio is lost or a difference between the actual compression ratio and a target compression ratio becomes greater than an assumed deviation, due to some abnormalities, the reference position learning operation is immediately carried out, thereby enabling a quick return to a state where normal compression ratio control can be carried out. 1. A control device for a compression ratio variable internal combustion engine provided with a compression ratio variable mechanism for changing an engine compression ratio in accordance with a rotational position of a control shaft and configured to control the compression ratio variable mechanism to a target compression ratio set in accordance with an engine operating condition , comprising:a compression ratio detection unit that detects an actual compression ratio corresponding to an actual engine compression ratio;a first reference position learning means for carrying out reference position learning operation for the compression ratio detection unit with the control shaft mechanically locked up at a predetermined reference position in a predetermined engine operating condition; anda second reference position learning means for carrying out the reference position learning operation, during operation of the engine, when the actual compression ratio is lost or when a difference between the actual compression ratio and a target ...

Variable compression ratio internal combustion engine

The variable compression ratio internal combustion engine 1 comprises: a variable compression ratio mechanism 6 able to change a mechanical compression ratio; an exhaust promotion mechanism 50, 55 able to reduce cylinder residual gas after an exhaust stroke of cylinders; and a control device 80 configured to control the mechanical compression ratio by the variable compression ratio mechanism and control an operation of the exhaust promotion mechanism. The control device is configured to operate the exhaust promotion mechanism in at least a partial time period of a time period from when it is demanded that the mechanical compression ratio be raised to when the mechanical compression ratio finishes being changed.

CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control method and a control device are provided for an internal combustion engine structured to vary a mechanical compression ratio by varying a range of slide of a piston with respect to a cylinder bore, and structured to control a flow of cooling water in a water jacket formed around the cylinder bore, wherein variation of the mechanical compression ratio causes the piston to slide on a corroded portion formed in the cylinder bore. A control process includes: acquiring a temperature correlating with a cylinder bore wall temperature; and stopping the flow of cooling water in the water jacket, in response to a condition that the acquired temperature is lower than a preset temperature point. 16.-. (canceled)7. A control method for an internal combustion engine structured to vary a mechanical compression ratio by varying a range of slide of a piston with respect to a cylinder bore , and structured to control a flow of cooling water in a water jacket formed around the cylinder bore , wherein variation of the mechanical compression ratio causes the piston to slide on a corroded portion formed in the cylinder bore , the control method comprising:acquiring a temperature correlating with a cylinder bore wall temperature; andstopping the flow of cooling water in the water jacket, in response to a condition that the acquired temperature is lower than a preset temperature point.8. The control method as claimed in claim 7 , comprising:setting the preset temperature point higher than a point corresponding to a point of the cylinder bore wall temperature at which condensed water occurs in the cylinder bore.9. The control method as claimed in claim 7 , comprising:acquiring a temperature correlating with an intake air temperature; andsetting the preset temperature point in accordance with the acquired temperature correlating with the intake air temperature.10. The control method as claimed in claim 9 , comprising:setting the preset temperature point such that the preset ...

APPARATUS AND METHOD FOR CONTROLLING ROTATION SPEED OF INTERNAL COMBUSTION ENGINE

Rotation speed control apparatus including an electronically controllable throttle valve capable of changing an intake air quantity, a variable compression ratio mechanism capable of changing a mechanical compression ratio, and an ECU configured to calculate a deviation between a target idle rotation speed and an actual rotation speed during idle operation, select either one or both of the intake air quantity and the mechanical compression ratio as control targets in accordance with magnitude of the deviation, and reduce the deviation by changing the selected either one or both of the intake air quantity and the mechanical compression ratio. 1. An apparatus for controlling rotation speed of an internal combustion engine , comprising:an intake air quantity change section configured to change an intake air quantity in the internal combustion engine;a compression ratio change section configured to change a mechanical compression ratio in the internal combustion engine;a rotation speed detection section configured to detect actual rotation speed of the internal combustion engine; anda control section configured to calculate a deviation between a target rotation speed and the actual rotation speed during execution of rotation speed control to bring the actual rotation speed of the internal combustion engine close to the target rotation speed, select either one or both of the intake air quantity and the mechanical compression ratio as control targets in accordance with magnitude of the deviation, and reduce the deviation by changing the selected either one or both of the intake air quantity and the mechanical compression ratio.2. The apparatus for controlling rotation speed of an internal combustion engine as claimed in claim 1 , wherein the control section is configured to reduce the deviation by changing the intake air quantity mainly when an absolute value of the deviation is relatively large claim 1 , and reduce the deviation by changing the mechanical compression ...

VARIABLE COMPRESSION RATIO DEVICE

Disclosed is a variable compression ratio device which changes a top dead center of a piston provided in an engine depending on a driving state of the engine. The variable compression ratio device may include: a lower piston reciprocally movable in a cylinder of the engine and connected with a connecting rod to rotate a crankshaft, an operation chamber, an upper piston disposed above the lower piston and partially inserted into the operation chamber, a push plate dividing the operation chamber into upper and lower spaces, a hydraulic pressure chamber which is the lower space, an elastic member provided in the upper space to push the push plate downward, a hydraulic pressure supply unit selectively supplying hydraulic pressure to the hydraulic pressure chamber, and a hydraulic pressure supply pathway connecting the hydraulic pressure supply unit and the hydraulic pressure chamber for supplying the hydraulic pressure. 1. A variable compression ratio device which changes a top dead center of a piston provided in an engine depending on a driving state of the engine , the variable compression ratio device comprising:a lower piston which is provided to be reciprocally movable in a cylinder of the engine, and connected with a connecting rod to rotate a crankshaft by reciprocal motion thereof;an operation chamber that is formed above a portion of the lower piston which is connected with the connecting rod;an upper piston which is disposed above the lower piston, and partially inserted into the operation chamber;a push plate which is formed on a part of the upper piston to divide the operation chamber into an upper space and a lower space;a hydraulic pressure chamber which is the lower space of the divided operation chamber;an elastic member which is provided in the upper space of the divided operation chamber to push the push plate downward;a hydraulic pressure supply unit which selectively supplies hydraulic pressure to the hydraulic pressure chamber; anda hydraulic ...

VARIABLE COMPRESSION RATIO MECHANISM FOR INTERNAL COMBUSTION ENGINE

Disclosed is a variable compression ration mechanism in which a control shaft is rotated and driven by an electric motor through a wave gear reducer. The wave gear reducer includes: a first internal gear member; an external gear member arranged concentrically inside the internal gear member; a wave generator having an oval outer shape and arranged inside the external gear member; and a second internal gear member, wherein a ratio of the number of teeth of a fixed gear portion of the first internal gear member to the number of teeth of a first gear portion of the external gear member is set greater than a ratio of the number of teeth of an output-side gear portion of the second internal gear member to the number of teeth of a second gear portion of the external gear member. 17.-. (canceled)8. A variable compression ratio mechanism for an internal combustion engine , comprising a gear reducer that reduces and transmits rotation of an actuator as a drive torque to a control shaft so as to change a rotational position of the control shaft and thereby vary an engine compression ratio of the internal combustion engine ,wherein the gear reducer comprises:an input-side member connected to a rotation shaft of the actuator;an output-side member that transmits the reduced rotation of the actuator to the control shaft;a fixed member fixed to a housing of the actuator; andan intermediate member that transmits torque from the input-side member to the output-side member and the fixed member,wherein the intermediate member has a first gear portion brought into engagement with a fixed gear portion of the fixed member and a second gear portion brought into engagement with an output-side gear portion of the output-side member,wherein a ratio of the number of teeth of the fixed gear portion to the number of teeth of the first gear portion is set higher than a ratio of the number of teeth of the output-side gear portion to the number of teeth of the second gear portion, andwherein the ...

Infinitely Variable Compression Ratio and Single Stroke Length Mechanism or Dual Stroke Length Mechanism of Reciprocating 2-Cycle or 4-Cycle Internal Combustion Engine

A balanced and rotating mechanism of an internal combustion engine, which combines adjustable variable compression ratio with long power and exhaust strokes and short intake and compression strokes to obtain an internal combustion engine with variable air intake flow and maintain a constant pressure ignition. The mechanism includes a mirror-image planetary-gear assembly, a gear-pin assembly, and a piston-and-connecting rod assembly. The mirror-image planetary-gear assembly includes a first planetary-gear assembly and a second planetary-gear assembly; wherein each includes a sun gear, a primary planet gear, a plurality of secondary planet gears, and a ring gear. The first planetary-gear assembly and the second planetary-gear assembly are mounted along a main rotation axis, offset from each other and mirroring each other. The gear-pin assembly is eccentrically connected between the primary planet gears. Resultantly, rotating the sun gears alters the orientation of the gear-pin assembly, and thus changing the top dead center height. 1. An infinitely variable compression ratio and single stroke length mechanism or dual stroke length mechanism of reciprocating 2-cycle or 4-cycle internal combustion engine comprises:a mirror-image planetary-gear assembly;a gear-pin assembly;a piston-and-connecting rod assembly;the mirror-image planetary-gear assembly comprises a first planetary-gear assembly and a second planetary-gear assembly;the first planetary-gear assembly and the second planetary-gear assembly each comprise a sun gear, a primary planet gear, a plurality of secondary planet gears, and a ring gear;the first planetary-gear assembly and the second planetary-gear assembly being mounted offset from each other;the sun gear from the first planetary-gear assembly and the sun gear from the second planetary-gear assembly being concentrically positioned with each other about a main rotation axis;the primary planet gear from the first planetary-gear assembly and the primary ...

VARIABLE COMPRESSION RATIO DEVICE

A variable compression ratio device mounted to an engine, the engine rotating a crankshaft using a combustion force of a gas mixture and a piston, the variable compression ratio device changing a compression ratio of the mixture and including a connecting rod including a small end rotatably connected to the piston and a big end formed with a circular hole to be eccentrically rotatably connected to the crankshaft, a crank pin provided in the crankshaft, an eccentric cam provided to be concentrically rotatable in the hole of the big end and having a crank pin mounting hole eccentrically inserted with the crank pin to be rotatably connected, and a cam rotation unit provided inside the eccentric cam and rotating the eccentric cam in a clockwise or counterclockwise direction in a hole of the big end by a selectively supplied hydraulic pressure. 1. A variable compression ratio device mounted to an engine , the engine rotating a crankshaft using a combustion force of a gas mixture and a piston , the variable compression ratio device changing a compression ratio of the mixture and comprising:a connecting rod including a small end rotatably connected to the piston and a big end formed with a circular hole to be eccentrically rotatably connected to the crankshaft;a crank pin provided in the crankshaft;an eccentric cam provided to be concentrically rotatable in the hole of the big end and having a crank pin mounting hole eccentrically inserted with the crank pin to be rotatably connected; anda cam rotation unit provided inside the eccentric cam and rotating the eccentric cam in a clockwise or counterclockwise direction in a hole of the big end by a selectively supplied hydraulic pressure.2. The variable compression ratio device of claim 1 , wherein the cam rotation unit includes:a diaphragm formed toward a center of the eccentric cam from an exterior circumference of the eccentric cam;a first chamber formed at one side of the diaphragm in the circumferential direction inside ...

VARIABLE COMPRESSION RATIO APPARATUS

A variable compression ratio apparatus, which is provided to an engine rotating a crank shaft upon receiving combustion power of a mixture from a piston for changing a compression ratio of the mixture, may include a connecting rod transferring combustion power of the mixture received from the piston to the crankshaft, and including a small end rotatably connected with the piston and a large end forming a circular hole, a crank pin, an eccentric cam disposed to be concentrically rotatable in the hole of the large end, an eccentric link at which the eccentric cam is disposed at a first end, a variable link having a first end rotatably connected with a second end of the eccentric link, a control link having a first end rotatably connected with a second end of the variable link, and a control shaft controlled by a controller and rotated together with the control link. 1. A variable compression ratio apparatus provided to an engine rotating a crankshaft upon receiving combustion power of a mixture of fuel and air from a piston for changing a compression ratio of the mixture , the variable compression ratio apparatus comprising:a connecting rod transferring the combustion power of the mixture received from the piston to the crankshaft, and including a small end rotatably connected with the piston and a large end including a first hole for rotatable and eccentric connection with the crankshaft;a crank pin disposed at the crankshaft;an eccentric cam disposed to be concentrically rotatable in the first hole of the large end for eccentric insertion and rotatable connection of the crank pin in the first hole;an eccentric link including a first end at which the eccentric cam is disposed to rotate together with the eccentric cam;a variable link having a first end rotatably connected with a second end of the eccentric link;a control link having a first end rotatably connected with a second end of the variable link; anda control shaft disposed at a second end of the control link ...

DEVICE FOR ADJUSTING THE EFFECTIVE LENGTH OF A CONNECTING ROD DEPENDING ON THE SUPPLY PRESSURE

A device for adjusting the effective length of a connecting rod for an internal combustion engine, includes at least one connecting rod which has a variable length and which can be locked in at least two length settings, at least one first oil pump for supplying oil to the at least one connecting rod with a variable length, and a control unit which provides for a switchover between the length settings of the connecting rod in the event of a change in the oil supply pressure for the connecting rod. The aim of the invention is to shorten the switching times during a switchover between the length settings of the connecting rod. According to the invention, this is achieved in that at least one second oil pump is provided which can be switched on when an oil supply is required for the at least one connecting rod with a variable length or which takes over the oil supply for the at least one connecting rod with a variable length, and the second oil pump supplies a specified delivery flow at the moment of the activation of the oil supply for the connecting rod or at the moment the second oil pump takes over the oil supply for the connecting rod. A method for providing such a device for adjusting the effective length of a connecting rod is also provided. 12. A device for adjusting the effective length of a connecting rod for an internal combustion engine , comprising at least one length-adjustable connecting rod which can be locked in at least two different length positions , at least one first oil pump for the oil supply of to the at least one length-adjustable connecting rod , and a control unit which , in the event of a change in an oil supply pressure of the connecting rod , ensures switchover between the length positions of the connecting rod , wherein at least one second oil pump is provided , which can be switched on , if required , to the oil supply of the at least one length-adjustable connecting rod or takes over the oil supply of the at least one length-adjustable ...

VARIABLE COMPRESSION RATIO DEVICE FOR INTERNAL COMBUSTION ENGINE

A variable compression ratio device for an internal combustion engine includes: a connecting rod, having a small end and a large end, wherein a support hole formed at the small end is pivotally supported by a support shaft of a piston that reciprocates in a cylinder, and a support hole formed at the large end is pivotally supported by a support shaft of a crankshaft; an eccentric sleeve that is rotatably installed between the support hole of the small end or the support hole of the large end and the support shaft, and displaces a center axis of the support hole of the small end or a center axis of the support hole of the large end with respect to a center axis the support shaft; and an actuator that drives and rotates the eccentric sleeve. 1. A variable compression ratio device for an internal combustion engine comprising:a connecting rod, having a small end and a large end, wherein a support hole formed at the small end is pivotally supported by a support shaft of a piston that reciprocates in a cylinder, and a support hole formed at the large end is pivotally supported by a support shaft of a crankshaft;an eccentric sleeve that is rotatably installed between the support hole of the small end or the support hole of the large end and the support shaft, and displaces a center axis of the support hole of the small end or a center axis of the support hole of the large end with respect to a center axis the support shaft; andan actuator that drives and rotates the eccentric sleeve.2. The variable compression ratio device for an internal combustion engine according to claim 1 , an pressure oil chamber that is formed between the small end or the large end of the connecting rod, and the eccentric sleeve; and', 'a transmitting unit for transmitting oil pressure applied to the pressure oil chamber to the eccentric sleeve, and, 'wherein the actuator includes,'}wherein the variable compression ratio device further comprises a control unit for controlling the rotation of the ...

INTERNAL COMBUSTION ENGINE

An internal combustion engine equipped with: a cylinder block in the interior of which pistons are arranged; a cylinder head containing recessed parts; cylinder liners affixed to the surfaces of hole parts of the cylinder block; and a variable compression ratio mechanism that changes the mechanical compression ratio. The variable compression ratio mechanism is formed such that the size of the combustion chamber can be changed by moving the cylinder head relative to the cylinder block. The cylinder liners extend such that the end parts facing the cylinder head are arranged within the recessed parts of the cylinder head within the range of relative movement of the cylinder head with respect to the cylinder block. 1. An internal combustion engine comprising:a cylinder block which has a hole inside of which a piston is arranged;a cylinder head which includes a recess which has a top surface of a combustion chamber;a cylinder liner which is fastened at a surface of the hole of the cylinder block and which the piston contacts; anda variable compression ratio mechanism which changes a mechanical compression ratio; whereinthe variable compression ratio mechanism is formed so that the cylinder head is moved relative to the cylinder block whereby the combustion chamber is variably formed in size,the cylinder liner extends so that, in the range where the cylinder head moves relative to the cylinder block, an end part facing the cylinder head is arranged inside of the recess of the cylinder head, andthe end part of the cylinder liner at the side facing the cylinder head becomes gradually thinner toward a front end and has cross-sectional shape which is slanted from the front end toward the inside of the combustion chamber to form tapered shape.2. The internal combustion engine according to claim 1 , wherein the end part of the cylinder liner is formed so as to stick out from the cylinder block and slides with respect to the recess of the cylinder head.3. The internal combustion ...

ACTUATOR MOUNTING STRUCTURE FOR INTERNAL-COMBUSTION ENGINE HAVING VARIABLE COMPRESSION RATIO

An actuator mounting structure of a variable compression ratio internal combustion engine includes: a variable compression ratio mechanism arranged to vary an engine compression ratio in accordance with a rotational position of a control shaft; an actuator arranged to drivingly rotate the control shaft, the actuator being fixed on an actuator mounting portion provided to a side wall of a main body of the engine by using a plurality of fixing bolts, and a rigidity improvement section arranged to improve a mounting rigidity of the actuator to the actuator mounting portion, and which is provided within an inter-bolt distance between two bolts of the plurality of the fixing bolts, which are located on the both sides in a direction of a crank shaft. 1. An actuator mounting structure of a variable compression ratio internal combustion engine , the actuator mounting structure comprising:a variable compression ratio mechanism arranged to vary an engine compression ratio in accordance with a rotational position of a control shaft;an actuator arranged to drivingly rotate the control shaft, the actuator being fixed on an actuator mounting portion provided to a side wall of a main body of the engine by using a plurality of fixing bolts, anda rigidity improvement section arranged to improve a mounting rigidity of the actuator to the actuator mounting portion, and which is provided within an inter-bolt distance between two bolts of the plurality of the fixing bolts, which are located on the both sides in a direction of a crank shaft,wherein the actuator mounting portion is provided to a side wall of an upper oil pan fixed to a lower portion of a cylinder block; the lower oil pan is fixed to an upper oil pan lower surface side flange portion which is formed on a lower surface side of this upper oil pan; and a part of this upper oil pan lower surface side flange portion is positioned within the inter-bolt distance so as to constitute a first rigidity improvement section of one of ...