КЛАПАН С КОМБИНИРОВАННЫМ СЕДЛОМ И ДИСКОВЫМ РАСПЫЛИТЕЛЕМ

Изобретение относится к двигателестроению, в частности к клапанным форсункам для систем впрыскивания топлива двигателей внутреннего сгорания. Изобретение позволяет упростить конструкцию, уменьшить ее себестоимость и материалоемкость и улучшить герметичность. Клапан, в частности клапанная форсунка для систем впрыскивания топлива двигателей внутреннего сгорания, имеет седло, выполненное на корпусе седла и взаимодействующее с управляемым запорным элементом с обеспечением плотной посадки, и дисковый распылитель с по меньшей мере одним распылительным отверстием. Корпус седла и дисковый распылитель выполнены за одно целое из плоской, деформируемой обработкой давлением заготовки, которая представляет собой листовую металлическую деталь и которой придана такая стаканообразная форма, что к ней при закрытом клапане плотно прилегает в зоне седла незадействованный запорный элемент. На участке по ходу потока за седлом деталь образует дисковый распылитель, в котором имеется по меньшей мере одно распылительное ...

РАСПЫЛИТЕЛЬНАЯ ШАЙБА И КЛАПАН С ТАКОЙ ШАЙБОЙ

Изобретение относится к двигателестроению, в частности к клапанным форсункам в системах впрыскивания топлива. Изобретение позволяет упростить конструкцию, повысить надежность и качество распыливания, снизить выброс отработавших газов и уменьшить расход топлива. Распылительная шайба, в частности, для клапанных форсунок выполнена по меньшей мере из одного металлического материала и содержит по меньшей мере одно впускное и по меньшей мере одно выпускное отверстия. Шайба выполнена цельной с несколькими образующими ее функциональными плоскостями, площадь А40с входного поперечного сечения, представляющая собой произведение длин периметров всех впускных отверстий на высоту h канала, измеряемую перпендикулярно поперечному сечению всех впускных отверстий в этом канале, больше площади А42c выходного поперечного сечения в канале, которая является произведением длин периметров всех выпускных отверстий на высоту h канала, измеряемую перпендикулярно поперечному сечению в канале. Клапан, в частности клапанная ...

СПОСОБ РАБОТЫ ТОПЛИВНОЙ ФОРСУНКИ

Изобретение может быть использовано в системах топливоподачи двигателей внутреннего сгорания. В одном примере система топливной форсунки включает в себя иглу 205 форсунки со штифтом 210 форсунки с криволинейным топливным каналом 204 неравномерной ширины по внешней окружности штифта 210 форсунки, гидравлически соединенным по длине криволинейного топливного канала 204 с топливной емкостью 212 внутри штифта форсунки. Привод 202, соединенный с иглой 205 форсунки, может последовательно перемещать и позиционировать иглу 205 форсунки так, чтобы устанавливать гидравлическое соединение между криволинейным топливным каналом 204 и одним или более сопловыми отверстиями 230-245 топливной форсунки в каждом положении. Продолжительность гидравлического соединения в каждом положении основана на ширине криволинейного топливного канала и может определять объем топлива, выпускаемого только из этих сопловых отверстий, тем самым уменьшая взаимодействие струи топлива и увеличивая степень распыливания струи топлива ...

УСТРОЙСТВО ВПРЫСКА ТОПЛИВА

Изобретение относится к двигателестроению, в частности к устройствам впрыска топлива для двухтактных дизельных двигателей. Изобретение позволяет обеспечить хорошее сгорание, снизить расход топлива и уменьшить выброс вредных веществ. Устройство содержит входящую в соответствующую камеру сгорания, расположенную эксцентрично оси камеры сгорания сопловую головку, которая имеет глухой канал, в который подается топливо и от которого отходят несколько сопловых каналов. По меньшей мере оси крайних сопловых каналов указанного ряда наклонены внутрь относительно радиального по отношению к оси глухого канала направления. Условия вхождения топлива примерно одинаковы для всех сопловых каналов, что обеспечивает стабильность струи. Входные камеры отходят от глухого канала и соответствуют по меньшей мере части сопловых каналов. Ширина в свету камер больше диаметра сопловых каналов и они выполнены так, что для всех сопловых каналов ряда создаются по меньшей мере приблизительно равные соотношения длин. 13 ...

КЛАПАННАЯ ФОРСУНКА ДЛЯ ВПРЫСКИВАНИЯ ТОПЛИВА

Изобретение относится к двигателестроению, в частности к системам впрыскивания топлива двигателей внутреннего сгорания со сжатием рабочей смеси и принудительным зажиганием. Изобретение позволяет повысить герметичность клапана в закрытом состоянии. Клапанная форсунка для впрыскивания топлива для двигателей внутреннего сгорания содержит корпус, подвижный запорный элемент, взаимодействующий с опорной поверхностью седла, выполненной на образующей седло клапана втулке и переходящей на ее нижнем по ходу потока топлива конце в выпускное отверстие, которое проходит до нижней торцевой стороны втулки. Распылительная шайба соединена первым сварным швом с нижней торцевой стороной втулки. В распылительной шайбе предусмотрено по меньшей мере одно распылительное отверстие. В нижней торцевой стороне втулки между выпускным отверстием и первым сварным швом предусмотрен паз, окружающий с радиальным промежутком выпускное отверстие. 3 з.п.ф-лы, 2 ил.

ТОПЛИВНАЯ ФОРСУНКА

Изобретение может быть использовано в системах топливоподачи двигателей внутреннего сгорания (ДВС). В заявке описана топливная форсунка для применения в ДВС, имеющая корпус (1), в котором образована полость (2) высокого давления, заполняемая топливом под высоким давлением, и в котором расположена перемещающаяся в продольном направлении игла (4), которая имеет уплотняющую поверхность (5), которой она взаимодействует с выполненным на корпусе (1) запирающим конусом (7) и таким путем открывает и закрывает соединение полости (2) высокого давления с глухим отверстием (10). Это глухое отверстие (10), примыкая непосредственно к запирающему конусу (7), образует цилиндрический участок (12), в результате чего на переходе между запирающим конусом (7) и глухим отверстием (10) образуется входная кромка (11). В корпусе (1) топливной форсунки выполнено по меньшей мере одно распыливающее отверстие (14), которое отходит от глухого отверстия (10). Цилиндрический участок глухого отверстия (10) выполнен с уменьшением ...

ЗАПОРНЫЙ ЭЛЕМЕНТ КЛАПАНА И СПОСОБ И УСТРОЙСТВО ДЛЯ ИЗГОТОВЛЕНИЯ УПЛОТНИТЕЛЬНЫХ ПОВЕРХНОСТЕЙ НА ЗАПОРНЫХ ЭЛЕМЕНТАХ КЛАПАНА

Изобретение относится к двигателестроению, в частности к способам и устройствам для обработки уплотнительных поверхностей на запорных элементах клапана для распыления топлива в установках для впрыскивания топлива в двигателях внутреннего сгорания. Изобретение обеспечивает герметичное запирание клапана и получение идеальных уплотнительных поверхностей. Запорный элемент клапана с продольной осью запорного элемента снабжен хвостиком клапана, конусным участком и вращательно-симметричной уплотнительной поверхностью, проходящей по линии контакта между переходным участком и участком, имеющим конусную форму. Уплотнительная поверхность выполнена в виде узкой сферической зоны с радиусом, выраженным математической зависимостью. Способ изготовления вращательно-симметричных уплотнительных поверхностей на запорных элементах клапанов заключается в том, что продольную ось запорного элемента клапана таким образом наклоняют относительно продольной оси инструмента, что запорный элемент клапана выполняет прецизионное ...

РАСПЫЛИТЕЛЬ ДЛЯ ДИЗЕЛЬНОГО ДВИГАТЕЛЯ

Изобретение относится к машиностроению, а именно к двигателестроению, точнее к топливной системе дизеля. Распылитель содержит корпус (1) и запирающую иглу (2). Корпус имеет запирающий конус (3), подыгольный объем (4), распыливающие отверстия первой (5) и второй (6) групп, при этом распыливающие отверстия второй группы в сравнении с отверстиями первой группы выполнены большим диаметром. Кольцевая проточка (10) на игле выполнена с зазором между образующей (11) кольцевой проточки и поверхностью запирающего конуса (3). В исходном положении иглы входные кромки (8) распыливающих отверстий второй группы расположены по высоте в пределах между плоскостями расположения ограничивающих кромок (12 и 13) проточки, а при перемещении иглы и достижении ею упора отверстия второй группы расположены по высоте за пределами плоскости расположения нижней ограничительной (13) кромки кольцевой проточки на игле. Технический результат – повышение экономических и экологических показателей дизеля путем организации ...

СОПЛО КЛАПАНА ДЛЯ ВПУСКА ТОПЛИВА И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ

Изобретение относится к машиностроению, а именно к способам изготовления сопла клапана для впуска топлива, предназначенного для двигателя внутреннего сгорания, в частности для большого двухтактного двигателя. Сопло клапана для впуска топлива изготавливают посредством воздействия на изотропный, мелкозернистый порошок, находящийся в форме, имеющей желаемую наружную конфигурацию сопла, давления порядка по меньшей мере 800 бар (790 кгс/см2) и температуры порядка по меньшей мере 1000oC в течение по меньшей мере 1 ч. После этого в заготовке сопла, обработанной изостатическим давлением в горячем состоянии, посредством механической обработки создают канал для прохождения потока с определенным количеством отверстий сопла. Сопло мажет быть выполнено из обработанного давлением в горячем состоянии сплава на основе кобальта, например Стеллита 6, или сплава на основе никеля, содержащего 20 - 30% Сr , 4 -8% Аl и 0,2- 0,55%С, а возможно и W, Нf , Nb , Мо, Si , Y и/или Fе в количествах порядка 1,8%. Сопло ...

ТОПЛИВНАЯ ФОРСУНКА ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ ДЛЯ ПОДАЧИ ТОПЛИВА, ЗАХВАЧЕННОГО ГАЗОМ

Использование: двигателестроение, в частности топливовпрыскивающая аппаратура. Сущность изобретения: инжектор топлива для двигателя внутреннего сгорания, имеющий селективно открывающуюся насадку 10, через которую топливо подается в камеру сгорания двигателя. Насадка 10 включает отверстие 12, имеющее внутреннюю кольцевую поверхность 13, и клапанный элемент 20, имеющий наружную кольцевую поверхность, соосную относительно внутренней кольцевой поверхности. Кольцевые поверхности имеют такую форму, что, когда внутренняя и наружная кольцевые поверхности находятся в плотном контакте, закрывая насадку, максимальная ширина 17 прохода между упомянутыми поверхностями по существу не превышает 40 микрон, предпочтительно не превышает 20 микрон, в направлении, перпендикулярном упомянутым поверхностям. 7 з. п. ф-лы, 4 ил.

УСОВЕРШЕНСТВОВАННЫЙ ЭЛЕКТРОМЕХАНИЧЕСКИЙ ИНЖЕКТОР ДЛЯ ГАЗОВОГО ТОПЛИВА

... 1. Электромеханический инжектор (1) для подачи газового топлива в цилиндр двигателя внутреннего сгорания, в частности, двигателя автомобиля, содержащий электромагнитный исполнительный механизм (2), воздействующий на дисковидный механический перекрывающий элемент (3), выполненный для открытия или перекрытия канала (4) для прохода упомянутого топлива из подающей магистрали (61) в доставляющую магистраль (5), соединенную с выходным отверстием (6), при этом между упомянутой доставляющей магистралью (5) и упомянутым перекрывающим элементом (3) установлен уплотнительный элемент (40), прикрепленный к перекрывающему элементу (3) и перемещающийся с ним; отличающийся тем, что уплотнительный элемент (40) имеет углубление (44) в его конце (42), который взаимодействует с концом (43) доставляющей магистрали (5), когда инжектор (1) не функционирует; причем упомянутый конец (42) имеет кольцевую форму; а уплотнительный элемент (40) имеет форму усеченного конуса и опирается своим суживающимся концом (42) ...

ТОПЛИВНЫЙ КЛАПАН И СПОСОБ ВПРЫСКА ЖИДКОГО ТОПЛИВА В КАМЕРУ СГОРАНИЯ БОЛЬШОГО ДВУХТАКТНОГО ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ С ТУРБОНАДДУВОМ С ВОСПЛАМЕНЕНИЕМ ОТ СЖАТИЯ

Изобретение может быть использовано в системах топливоподачи двигателей внутреннего сгорания (ДВС). Предложен топливный клапан (50) для впрыска жидкого топлива в камеру сгорания двухтактного ДВС с турбонаддувом и воспламенением от сжатия, содержащий удлиненный корпус (52) клапана и сопло (54) с закрытым наконечником (59), каналом (55) и отверстиями (56) впрыска. Топливный клапан содержит топливовпускное отверстие (53) для присоединения к источнику жидкого топлива под давлением и аксиально подвижную иглу (61), установленную с возможностью скольжения в продольном отверстии (64) в корпусе (52) клапана с зазором между иглой (61) клапана и отверстием (64) для иглы, при этом игла (61) клапана опирается на седло (69) в закрытом положении. Седло (69) расположено между топливной камерой (58) и выпускным отверстием (68), при этом выпускное отверстие (68) соединено с каналом (55) в сопле (54), а топливная камера (58) соединена с топливовпускным отверстием (53). Топливный клапан содержит отверстие ...

ТОПЛИВНАЯ ФОРСУНКА

EINSPRITZVENTIL MIT VERRINGERTER STROMDISPERSION, INSBESONDERE EINES AUSSERAXIALEN EINGESPRITZTEN STROMES

FUEL INJECTOR FOR AN INTERNAL-COMBUSTION ENGINE

Brennstoffeinspritzventil und Brennkraftmaschine

VERFAHREN UND SYSTEME FÜR EINE KRAFTSTOFFEINSPRITZVORRICHTUNG

Es werden Verfahren und Systeme für eine Kraftstoffeinspritzvorrichtung mit Leitung bereitgestellt. In einem Beispiel kann ein Verfahren Anpassen einer Temperatur der Brennkammergase in einer Brennkammer und/oder Anpassen eines Kraftstoffverteilerdrucks als Reaktion auf eine von einer Photodiode der Leitung erfassten Menge an Licht beinhalten.

Ventil mit kombiniertem Ventilsitzkörper und Spritzlochscheibe

A valve, in particular a fuel injection valve for fuel injection systems of internal combustion engines, has a valve seat surface (17) designed on a valve seat body (14) which co-operates with a valve closure body (8) capable of being actuated to tightly close the valve, as well as a perforated injection disk (15) with at least one injection hole (18). According to the disclosed embodiment, the valve seat body (14) and the perforated injection disk (15) are made of a single flat, deformable workpiece (16). The workpiece (16) is shaped as a pot so that in the area of the valve seat surface (17) it tightly lies on the non-actuated valve closure body (8) in the closed state of the valve (1) and in an area located downstream of the valve seat surface (17) it forms the perforated injection disk (15) with at least one injection hole (18).

KRAFTSTOFFEINSPRITZVENTIL

EINSPRITZVORRICHTUNG ZUM EINSPRITZEN VON KRAFTSTOFF

BRENNSTOFFEINSPRITZVENTIL

BRENNSTOFFEINSPRITZSYSTEM

KRAFTSTOFFEINSPRITZDUESE.

Brennstoffeinspritzdüse mit veränderlicher Brennstoffsprühstrahlform.

KRAFTSTOFFEINSPRITZVENTIL SOWIE VERFAHREN ZU DESSEN EINSTELLUNG

Kraftstoffeinspritzeinrichtung

Kraftstoffeinspritzsystem für eine selbstzündende Brennkraftmaschine, mit wenigstens einer Pumpe zur Förderung von Kraftstoff in wenigstens einen Kraftstoffspeicher. Der Kraftstoffspeicher ist mit von wenigstens einem Steuergerät gesteuerten, durch Betätigungseinrichtungen betätigten Injektoren verbunden, deren Steuerkörper sich vollständig innerhalb der Injektoren bewegen. Zwischen den Injektoren und dem Kraftstoffspeicher besteht während des Betriebs der Brennkraftmaschine eine kontinuierliche Verbindung.

Ventil

Die Erfindung betrifft ein Ventil, insbesondere ein Servoventil für einen Kraftstoff-Injektor im Kraftfahrzeugbau. Das erfindungsgemäße Ventil umfasst ein axial bewegbares Ventilglied (10) und einen Ventilkörper (15), der eine Durchlassbohrung (25) und einen Dichtsitz (20) aufweist, an welchem ein Dichtabschnitt (35) eines freien Endabschnitts des Ventilglieds (10) in einer Schließstellung des Ventils dichtend ansitzt. Der freie Endabschnitt des Ventilglieds (10) weist in der Schließstellung des Ventils einen sich in die Durchlassbohrung (25) hinein- oder sich durch diese hindurcherstreckenden profilierten Abschnitt (30) auf, der innerhalb der Durchlassbohrung (25) derart positionierbar ist, dass der profilierte Abschnitt (30) in Abhängigkeit seines Profils und einem Hub des Ventilglieds (10) in der Durchlassbohrung (25) einen variablen Durchflussquerschnitt eröffnet.

Brennstoffeinspritzsystem

Ein Brennstoffeinspritzsystem (1) mit einem Brennstoffeinspritzventil (2) mit mehreren Abspritzöffnungen (13), das Brennstoff in einen Brennraum (6) einer Brennkraftmaschine einmißt, weist eine in den Brennraum (6) ragende Zündeinrichtung (8) mit zumindest einem ersten Pol (16) und einem zweiten Pol (17) auf. Die aus den Abspritzöffnungen (13) austretenden Brennstoffstrahlen (20) spreizen unterhalb im Bereich der Zündeinrichtung (8) einen im wesentlichen kegelmantelförmigen Brennstoffächer (11) auf. Das Ende des zumindest einen ersten Pols (16) ist seitlich neben dem in den Brennraum (6) ragenden Ende des zweiten Pols (17) angeordnet, und beide Enden liegen auf etwa gleicher Höhe der Längsachse der Zündeinrichtung (8).

Vorbehandlungsverfahren

Die Erfindung betrifft ein Verfahren zum Vorbehandeln eines an einem Düsenkörper (1) einer Kraftstoffeinspritzeinrichtung ausgebildeten Düsennadelsitzes (9), der mit einer Düsennadelspitze (7) zusammenwirkt, um die Einspritzung von Kraftstoff in den Brennraum einer Brennkraftmaschine zu steuern. DOLLAR A Um einen unerwünschten Mengendrift der Kraftstoffeinspritzung zu verringern, wird der Düsennadelsitz (9) mit einem Werkzeug beaufschlagt, das im Wesentlichen die Gestalt der Düsennadelspitze (7) aufweist.

BRENNSTOFFEINSPRITZVENTIL

VERFAHREN ZUR REDUZIERUNG VON ABLAGERUNGEN INNERHALB EINES SPRITZLOCHS EINER KRAFTSTOFFEINSPRITZVORRICHTUNG

Einspritzdüse

Fuel injection control e.g. for diesel IC engine

The fuel injector valve has a profiled tip with a number of outlet jets spaced around the tip. The valve element has a number of outer slots and rotates in the profiled tip to open and close the outlet jets. The valve element is rotated in discrete steps during the minimum pressure parts of the fuel pump cycle until the optimum valve opening is reached, depending on the engine speed. The valve element is driven by a servo drive (9) at the top of the injector. The fuel pump is operated by a reciprocating rive to provide pressure pulses separated by minimum pressure periods.

Brennverfahren für eine Brennkraftmaschine

Brennverfahren für eine Brennkraftmaschine zur Ausführung mit einem Dual-Fuel-Kraftstoffinjektor (1), wobei der Dual-Fuel-Kraftstoffinjektor (1) eingerichtet ist: Dieselkraftstoff über eine erste Düsenanordnung (17) desselben auszubringen; gasförmigen Kraftstoff über eine zweite, Gasdüsenanordnung (47) desselben auszubringen; wobei der Dual-Fuel-Kraftstoffinjektor (1) an einem Brennraumdeck (67) einer Brennkraftmaschine mit der ersten (17) und zweiten (47) Düsenanordnung in einen Brennraum (69) ragend angeordnet ist, so dass Dieselkraftstoff und der zweite Kraftstoff über die jeweilige Düsenanordnung (17, 47) in den Brennraum (69) ausbringbar ist; wobei bei dem Brennverfahren korrespondierend mit einem Diesel-Einspritzvorgang Dieselkraftstoff via Dieselkraftstoff-Einspritzstrahlen (77) über die erste Düsenanordnung (17) in den Brennraum (69) ausgebracht wird; wobei korrespondierend mit dem Diesel-Einspritzvorgang über die Gasdüsenanordnung (47) Luft in den Brennraum (69) ausgebracht wird ...

Fuel injection valve for IC engine

The fuel injection valve has a jet needle (1) displaced within a central bore of a valve body (2), with a valve surface (18) cooperating with a valve seat (25) provided by the latter, for controlling the fuel feed to a number of injection openings (26). The jet needle is formed over at least part of its length as a prismatic body (15) with between 3 and 6 side faces (35), with a longitudinal side face, parallel to the bore, between each 2 adjacent side faces, defining a longitudinal gap with the inside surface of the bore.

Einspritzventil mit Reinigungsnadel zum unmittelbaren Einspritzen von Brennstoff in den Verdichtungsraum bzw. die Zuendkammer oder den Gluehkopf einer Verbrennungsmaschine

EINSPRITZDUESE FUER VERBRENNUNGSMOTORE

Steuersystem für eine Brennkraftmaschine mit Direkteinspritzung

Nozzle unit for dosing of fluids or gases for fuel injection systems has guide surfaces between guide bore and nozzle body located partially outside sealing seat

The unit has a nozzle body (4) and a nozzle needle (6) in a guide bore (5). The guide faces (10,11) between guide bore and nozzle needle are at least partially located outside the sealing seat (8). The outward directed part of the nozzle body with guide surfaces, a proportioning aperture (9) opening into the guide bore, and the sealing seat, is a separate component fastened to the remaining part of the nozzle body. The guide surfaces are coated with a solid lubricant, e.g. graphite or molybdenum disulphide.

Fuel injection valve, for the direct injection of fuel at an IC motor, has a flame protection cone at the fuel injection openings to prevent a build-up of carbon residue deposits

The fuel injection valve, for direct fuel injection into the cylinders of an internal combustion motor, has an actuator to operate the valve needle and give the opening and closing movements of the valve closure at the valve seat surface of the valve seat body (5). At least one fuel injection opening is downstream of the valve seat. A flame protection cone (34) is at the outflow end (35) of the valve unit, formed at the valve seat body, with a pointed cone shape. The axial length (L) of the flame protection cone is up to three times the diameter (DB) of the valve unit at the valve seat body.

Einspritzdüse zum Einspritzen von Brennstoff

Verfahren zur Bildung eines zündfähigen Kraftstoff-Luftgemischs

Verfahren zur Bildung eines zündfähigen Kraftstoff-Luftgemischs in einem Brennraum (2) einer direkteinspritzenden Brennkraftmaschine mit einer einen Verschlusskörper (10) aufweisenden, nach außen öffnenden Einspritzdüse (1), mit der – der Kraftstoff als Kraftstoffkegel (7) eingebracht wird, und der Kraftstoffkegel (7) eine Masseelektrode (3') einer Zündkerze (3) im wesentlichen nicht benetzt, und wobei – am Ende des Kraftstoffkegels (7) im Bereich eines Kolbens (9) mindestens ein Toruswirbel (11) erzeugt wird, durch den ein zündfähiges Kraftstoff-Luftgemisch im Bereich der Zündkerze entsteht, und wobei – während des Kompressionshubs Kraftstoff in einem Einspritzzyklus in mindestens zwei Teilmengen in den Brennraum (2) eingebracht wird, wobei die erste Teilmenge 70 % bis 99 % der gesamten Kraftstoffmenge beträgt, und die zweite Teilmenge nach 0,05 ms bis 0,4 ms oder 1° KW bis 5° KW eingebracht wird, und der Einspritzzyklus zwischen 50° KW und 5° KW vor OT beendet wird.

Kraftstoffeinspritzventil

Fuel injection valve for internal combustion engine, has non-return valve provided for locking fuel supply to pressure area against supply direction in closing phase of valve needle, such that pressure increase of fuel takes place

The valve has a nozzle body (2), and a valve needle (5) controlled by a control valve and guided in the nozzle body in an axially displaceable manner, where the valve needle comprises two guide sections (13, 14). A fuel channel is formed in an inner side of the valve needle and provided for supplying the fuel to a valve needle pressure area (15). A non-return valve (50) is provided for locking the fuel supply to the pressure area against a supply direction in a closing phase of the valve needle, such that the pressure increase of the fuel takes place.

Brennstoffeinspritzventil

The invention relates to a fuel injection valve for fuel injection systems of internal combustion engines, comprising a valve closing body (4) that is functionally linked with a valve needle (3) and that interacts with a valve face (6) arranged in a recess of a valve seat body (5) to give a sealing seat, and at least one injection opening (7) arranged in the valve seat body (5). The recess of the valve seat body (5) defines a second surface (36) between the valve face (6) and the injection opening (7) which surface includes a more acute angle ( beta ) with the median axis (37) of the fuel injection valve (1) than the valve face (6). A closing body projection (35) disposed on the down-stream end of the valve closing body (4) has a peripheral surface (39) that forms an obtuse angle with the adjoining contour of the valve closing body (4).

Improvements in or relating to fuel injection nozzles for internal combustion engines

... 669,110. Fuel injectors. AKTIESELSKABET BURMEISTER & WAIN'S MASKIN-OG SKIBSBYGGERI. June 2, 1949 [June 4, 1948], No. 14874/49. Class 7 (iii) In a fuel injection nozzle comprising a valve 1 seating on a flat plate 6 and controlling a passage or passages 8 leading to the spraying orifices 9, the passages 8 have a diameter not exceeding one millimetre to prevent drip. The plate 6 may be provided with an annular cooling chamber 10 connected to cooling liquid feed and discharge passages 13, 14. In a modification the single passage 8 is replaced by a number of very narrow bore passages, and in Fig. 4 a member 22 with narrow bore fuel passages 23 therein is inserted in a wide bore 18 formed in the plate 6 or in a replaceable sleeve 19 secured therein. Specifications 273,251, [Ctass 7(iii)], and 442,899 are referred to.

FUEL INJECTION NOZZLES FOR INTERNAL COMBUSTION ENGINES

Turbine component and a process of fabricating a turbine component

Fuel injection nozzle

GASOLINE INJECTOR FOR AN INTERNAL COMBUSTION ENGINE

VALVE NOZZLE CONSTRUCTION

Downstream of the valve seat 3 the nozzle body 2 has a receiving bore 4 containing a pot-shaped insert member 5, a base portion 6 of which is provided with fuel injection channels 7 opening into a preparatory bore 9 defined by a cylindrical wall portion 18 of the insert member. The base portion 6 includes a depression 10 arranged so that a space 13 is formed between the movable valve element 1 and the base portion. …… ...

I.C.ENGINE FUEL INJECTOR NOZZLE

One or more orifices 6 direct fuel jets on to 2 tubular nozzle surface in order to atomise the fuel. The nozzle may be formed of two metal parts 31, 32 connected by laser beam welding. ...

I.c. engine fuel injector

A valve member 20 is lifted from a seating 16 by fuel under pressure to provide fuel flow through an outlet 17. The effective size of the outlet can be modified by a shaped control element 24 which extends through the outlet and is slidable within an axial drilling 23 in the valve member. The element is coupled to a fluid pressure actuated piston 26 for the purpose of adjusting the position of the control element within the outlet. The end of the element 24 within the outlet 17 may have different forms (Figs. 2 and 3). A restrictor 31 may damp movements of the piston 26 due to fluctuating pressures applied to the element 24. Electrically operated valves may control fuel pressure applied to the piston and a non-return valve may replace the restrictor 31. ...

Fuel injection nozzle for internal combustion engines

Fuel injection device for internal-combustion engines

Injection nozzle

LOW INERTIA FUEL PRESSURE ACTUATED INWARD OPENING DIRECT INJECTOR

A direct injection inwardly opening differential valve type nozzle based liquid or gaseous fuel injector with improved speed and frequency of operation by use of an ultra low inertia valve closer unit 10 positioned within the nozzle insertion tip 1of the injector, and with a valve tip 20 which is biased to the closed position by a spring 3 which also has at least part of its axial length within the nozzle insertion tip, and where the entire inertial mass of the valve closer unit 10 is preferably positioned at the tip of the injector. The injector is of benefit but not limited to, VCO and SAC nozzle type fuel injectors piezoelectrically operated from a fuel rail source. High-speed operation with negligible fuel leakage return flow of said nozzle benefits by being driven by the high-speed outward opening piezoelectric metering valve unit (29, fig.14), wherein return flow may be eliminated entirely by application of a venturi preferably inside the fuel injector.

FUEL INJECTION VALVE

FUEL INJECTOR

Electromagnetically actuated fuel injection valve for internal combustion engines

... 880,369. Fuel injection valves. BOSCH G.m.b.H., ROBERT. Sept. 16, 1959 [Sept. 24, 1958; June 26, 1959], No. 31512/59. Classes 7(3) and 7(6). An electromagnetically operated fuel injection valve is connected to its operating armature by a resilient member. In Fig. 2 the valve 55 is connected to the armature 54 by a sleeve 80 of synthetic resin material, e.g. nylon. The fuel flows through the core member 51 and through the needle 55. A flanged nut 87 limits the upward travel of the needle 55 and, due to the fuel which fills the space therein, cooperates with a flange 84 on the needle stem to damp the return of the needle to its seat. The injector valves 21, Fig. 1, are situated in the intake manifold branches and the solenoids 22 thereof are energized simultaneously through a transistor 28 rendered conductive by a pulse producing device 30 controlled by engine-operating characteristics such as temperature, pressure and throttle valve position. In a modification, Fig. 3, a gas-filled plastic ...

PROCEDURE FOR THE PRODUCTION OF A NOZZLE FOR A FUEL VALVE IN A DIESEL ENGINE AND A NOZZLE

DEVICE FOR INJECTING FUEL INTO THE COMBUSTION CHAMBER OF AN INTERNAL-COMBUSTION ENGINE

Fuel injection nozzle for internal combustion engines

A fuel injection nozzle for internal combustion engines has a nozzle body 1 and a nozzle needle 5 guided in it. The nozzle body 1 ends in a nozzle dome 3 which has injection openings 4 and a conical inner surface which at the same time forms a valve seat 6. The conical end of the nozzle needle 5 is pressed in a sprung manner against this valve seat 6. The pressure of the fuel being supplied lifts the nozzle needle 5 off the valve seat 6 against the force of a spring 7 in a first travel phase, pressing it against a stop 11 which, for its part, can be moved in a limited manner against the force of a further spring 8, in a second travel phase. In order to reduce the hydrocarbon emissions in the exhaust gases from the internal combustion engine and to reduce the ignition noise, the nozzle dome 3 has an exclusively conical inner surface, and the nozzle needle 5 has an exclusively conical end, with all the injection openings 4 originating from the valve seat 6. Furthermore, the cross section ...

FUEL INJECTOR WITH ELECTROMAGNETIC ACTUATOR

INJECTION NOZZLE

EINSPRITZVENTIL WITH OPTIMIZED SURFACE GEOMETRY BETWEEN A NOZZLE BODY AND A TIGHTENING NUT

DEVICE FOR INJECTING GASEOUS FUEL FOR FUEL FORCE ENGINES

FUEL INJECTION VALVE

FUEL INJECTION VALVE

DEVICE FOR INJECTING FUEL INTO THE COMBUSTION CHAMBER OF AN INTERNAL-COMBUSTION ENGINE

FUEL INJECTION VALVE FOR INTERNAL-COMBUSTION ENGINES

FUEL INJECTION VALVE FOR INTERNAL-COMBUSTION ENGINES

INJECTION NOZZLE FOR INJECTING FUEL

INJECTION NOZZLE FOR AIR-CONSOLIDATING, TO SELFEND VALVE-STEERED LIFTING CYLINDER INTERNAL-COMBUSTION ENGINES WITH DIRECT FUEL INJECTION

Injektion

Die Erfindung betrifft Injektor (10) zur direkten Einspritzung von Kraftstoff in einen Brennraum einer Brennkraftmaschine, insbesondere einer fremdgezündeten Brennkraftmaschine, mit einer insbesondere kegelig geformten Injektorspitze (12), welche zumindest zwei Einspritzöffnungen (14, 16) aufweist. Um Diffusionsverbrennung an der Injektorspitze zu vermindern ist vorgesehen, dass die Injektorspitze (12) zwischen den Einspritzöffnungen (14, 16) zumindest eine -vorzugsweise genau eine - vorragende Erhebung (20) aufweist.

VALVE, DEVICE AND PROCEDURE FOR THE PRODUCTION OF A FLUID PULSE

FUEL INJECTION NOZZLE

MECHANISM FOR INJECTING FUEL INTO A SECONDARY CURRENT OF COMBUSTION AIR OF A COMBUSTION CHAMBER.

PROCEDURE FOR THE PRODUCTION OF A NOZZLE FOR A FUEL VALVE IN A DIESEL ENGINE AND A NOZZLE

PROCEDURE FOR THE PRODUCTION OF A NOZZLE FOR A FUEL VALVE IN A DIESEL ENGINE AND A NOZZLE

PROCEDURE FOR THE PRODUCTION OF A NOZZLE FOR A FUEL VALVE IN A DIESEL ENGINE AND A NOZZLE

PROCEDURE FOR THE PRODUCTION OF A NOZZLE FOR A FUEL VALVE IN A DIESEL ENGINE AND A NOZZLE

PROCEDURE FOR THE PRODUCTION OF A NOZZLE FOR A FUEL VALVE IN A DIESEL ENGINE AND A NOZZLE

PROCEDURE FOR THE PRODUCTION OF A NOZZLE FOR A FUEL VALVE IN A DIESEL ENGINE AND A NOZZLE

PROCEDURE FOR THE PRODUCTION OF A NOZZLE FOR A FUEL VALVE IN A DIESEL ENGINE AND A NOZZLE

Swirl injector for internal combustion engine

Electronic fuel injection throttle body assembly

Present embodiments provide an electronic fuel injection throttle body (110) which may be used with a variety of engines of different manufacturers. The throttle body may be used to replace mechanical or hydraulically controlled carburetors with electronic fuel injection. The bores or barrels (140, 142) of the throttle body may comprise one or more stackable fuel injectors (1170-1173). The fuel component cover (132) may include a regulator (134) with a housing (131) formed integrally with the fuel component cover or alternatively, a regulator may be located remotely.

FUEL INJECTION VALVE

Capillary fuel injector with metering valve for an internal combustion engine

Feed injector for gasification system

FEED INJECTOR FOR GASIFICATION SYSTEM The present application and the resultant patent provide a feed injector nozzle (150) for a gasification system (100) with a reaction zone therein (160). The feed injector nozzle (150) may include a number of tubes (190) extending towards the reaction zone (160). The tubes (190) may define a number of passages (180) therebetween. A cooling water channel (300) may extend through one of the tubes (190). The cooling water channel (300) may include a first side (310) adjacent to one of the passages (180) and a second side (320) adjacent to the reaction zone (160). The first side (310) may include a first side thickness (330) and the second side (320) may include a second side thickness (340) with the first side thickness (330) being less than or equal to the second side thickness (340). Atmosphere 4 NPG; Steam 20 0 Fuel NH3 Air 3 0 45 Combustion 30 40 Gas 60 Air 55 Water 65Steam 7 100 T- 25 Water Fig. 1 Fig. 2 ...

Split-cycle engine with dual spray targeting fuel injection

INJECTOR VALVE WITH CONTOURED VALVE SEAT AND NEEDLE VALVE INTERFACE

FUEL INJECTION VALVE

A fuel injection valve is provided for introducing a fuel into an engine and controlling fuel flow to reduce variability between injection events. The fuel injection valve employs an arrangement for a valve nozzle that cooperates with a valve needle to provide a range of needle movement within which the fuel mass flow rate is substantially constant. This can be achieved by providing a restriction with a constant flow area for a predetermined range of needle movement. The method comprises commanding a valve needle to a position within the predetermined range of needle movement to reduce variability in the fuel mass flow rate, particularly when the engine is idling or operating under low load conditions.

FUEL INJECTION NOZZLE

FUEL SYSTEM FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING SAME

A fuel system for use in an internal combustion engine includes a plurality of fuel injectors, each injector including at least one capillary flow passage, the at least one capillary flow passage having an inlet end and an outlet end, a heat source arranged along the at least one capillary flow passage, the heat source operable to heat a liquid fuel in the at least one capillary flow passage to a level sufficient to convert at least a portion thereof from the liquid state to a vapor state, and a valve for metering fuel to the internal combustion engine, a controller to control the power supplied to the heat source of each of the plurality of fuel injectors to achieve a predetermined target temperature, a sensor for use in determining engine air flow and a sensor for measuring a value indicative of degree of engine warm-up of the internal combustion engine.

CONTROL METHOD AND APPARATUS FOR GASEOUS FUELLED INTERNAL COMBUSTION ENGINE

Disclosed is a method and apparatus to create an environment within a combustion chamber of an internal combustion engine suitable for auto-ignition and combustion of a fuel that will not otherwise auto-ignite. Under high load conditions a pilot quantity of the fuel is injected in the combustion chamber of an internal combustion engine during the compression stroke of the piston. The quantity and timing of the fuel are chosen to heat an intake charge within the combustion chamber to a temperature at or above the auto-ignition temperature of the fuel by the time required for a main injection of the fuel to drive the piston during the power stroke. Generally, auto-ignition temperatures should be reached at or near top dead center of the piston. Also, disclosed is an injector design to deliver the fuel in manner taught by the method.

FUEL INJECTOR FOR AN INTERNAL COMBUSTION ENGINE

A fuel injector for vaporizing a liquid fuel for use in an internal combustion engine. The fuel injector includes at least one capillary flow passage (12) , the at least one capillary flow passage (12) having an inlet end (14) and an outlet end (16), the capillary flow passage comprises a channel formed within a monolithic body produced from a material selected from the group consisting of ceramics, polymers, metals and composites thereof or a multi-layer ceramic body, a fluid control valve (18) for placing the inlet end of the at least one capillary flow passage (12) in fluid communication with the liquid fuel source and introducing the liquid fuel in a substantially liquid state, a heat source (20) arranged along the at least one capillary flow passage, the heat source (20) operable to heat the liquid fuel in the at least one capillary flow passage (12) to a level sufficient to change at least a portion thereof from the liquid state to a vapor state and deliver a stream of substantially ...

SYSTEM AND METHOD FOR PURGING FUEL FROM A FUEL INJECTOR DURING START-UP

A fuel system for use in an internal combustion engine includes a plurality of fuel injectors, each injector including at least one capillary flow passage, the at least one capillary flow passage having an inlet end and an outlet end, a heat source arranged along the at least one capillary flow passage, the heat source operable to heat a liquid fuel in the at least one capillary flow passage to a level sufficient to convert at least a portion thereof from the liquid state to a vapor state, and a valve for metering fuel to the internal combustion engine, a controller to control the power supplied to the heat source of each of the plurality of fuel injectors to achieve a predetermined target temperature, a sensor for use in determining engine air flow and a sensor for measuring a value indicative of degree of engine warm-up of the internal combustion engine. According to a further aspect of the present invention, an initial liquid fuel pulse is purged from the fuel injector while the intake ...

Fuel injection valve

A fuel injection valve is provided which includes a valve seat member ( 3 ) having a valve seat ( 8 ) and a nozzle ( 10 ) that is provided so as to be connected to a front end part of the valve seat member ( 3 ) so as to be positioned on the downstream side of the valve seat ( 8 ) and has a plurality of fuel discharge holes ( 11 b ) arranged around an axis (A) of the valve seat member ( 3 ), wherein the angle formed between the center line (Lb) of each of the fuel discharge holes ( 11 b ) and an inner end face ( 10 a ) of the nozzle ( 10 ) is set at an obtuse angle (α) on the side closer to the outer periphery of the nozzle ( 10 ) with respect to the center line (Lb) and an acute angle (β) on the side closer to the center of the nozzle ( 10 ) with respect to the center line (Lb), and fuel injected from a fuel discharge hole ( 10 b ) produces a fuel spray form (fb) as a fuel film having an arc-shaped cross section with a convex face facing the nozzle outer periphery side. This enables the loss of fuel injection energy to be reduced and the outline of a fuel spray form produced by injected fuel to be clear, thus improving penetration properties.

Fuel injection valve

The invention relates to a fuel injection valve for injecting fuel into a combustion chamber of an internal combustion engine, having a nozzle needle ( 1 ) which is guided, such that it can perform a stroke movement, in a central bore ( 2 ) of a nozzle body ( 3 ) in order to open up or close off at least one injection opening ( 4 ), wherein the nozzle needle ( 1 ) interacts, by means of an encircling sealing region ( 5 ) formed on the combustion-chamber-side end thereof, with a sealing seat ( 6 ) that runs conically and is formed on the combustion-chamber-side end of the nozzle body ( 3 ). According to the invention, the sealing seat ( 6 ) that runs conically has an opening angle (α 1 ) of between 30° and 50°, preferably of between 40° and 50°.

Dual Fuel Common Rail System And Engine Using Same

A dual fuel system for an engine includes a plurality of fuel injectors that each include an injector body with a tip component defining a plurality of gas nozzle outlets and a plurality of liquid nozzle outlets positioned for direct injection into one of the engine cylinders. Each of the fuel injectors is fluidly connected to a gaseous fuel common rail through a quill and an outer passage defined between an inner tube and an outer tube. Each of the fuel injectors is fluidly connected to a liquid fuel common rail through the quill and an inner passage defined by the inner tube. Each combination of an inner tube and outer tube extend into the engine housing between the quill and one of the fuel injectors. Each of the inner tubes extends through one of the outer tubes and is compressed between a conical seat on the quill and a conical seat on one of the fuel injectors.

Method for producing a fuel injection element having channels, and a fuel injection element

The invention relates to a method for producing a fuel injection element having channels, as well as to a fuel injection element. A fuel injection element according to the invention has helically extending channels and is produced with use of an extrusion tool.

Fuel injector

A fuel injector is described having a multi-orifice nozzle provided with a multitude of spray orifices through which fuel is injected, the multi-orifice nozzle having at least two spray orifices that have different spray-orifice diameters. Furthermore, a method is described for producing, by laser drilling, a multi-orifice nozzle having a multitude of spray orifices, at least two spray orifices having different spray orifice diameters.

Fuel Injector

The fuel injector provides an oncoming flow, that is uniform and stable in time, of the spray-discharge orifices is produced and consequently, and a reduction in variance in the spray and flow-through characteristics variables. The fuel injector includes at least one excitable actuator and a valve element that is movable along a longitudinal valve axis, which collaborates in a sealing manner with a valve seat. Upstream of the valve seat, circumferentially a plurality of flow-through regions are provided, between which there are guidance regions for the valve element. The spray-discharge orifices downstream from the valve seats, whose number differs from the number of the flow-through regions, discharge the fuel finely atomized. At least two flow-through regions differ in size, such as circumferential width and/or radial depth, and/or contour. The fuel injector directly injects fuel into a combustion chamber of an engine using compression of a fuel/air mixture and spark ignition. 18-. (canceled)9. A fuel injector for a fuel injection system of an internal combustion engine , for direct injection of fuel into a combustion chamber , comprising:at least one excitable actuator and a valve element that is movable along a longitudinal valve axis, which collaborates in a sealing manner with a valve seat; anda nozzle body at a spray-discharge end of the fuel injector;wherein circumferentially, there is a plurality of flow-through regions upstream of the valve seat, between which, in each case, there are guidance regions for the valve element, andwherein there are spray-discharge orifices downstream from the valve seat, whose number deviates from the number of flow-through regions, andwherein at least two flow-through regions differ from each other in size, including circumferential width and/or radial depth, and/or contour there is an asymmetrical distribution of the flow-through regions over the circumference.10. The fuel injector of claim 9 , wherein the number of spray- ...

Injector Valve with Miniscule Actuator Displacement

An injector comprising one or more piezoelectric driving stacks wherein a flow control member of the injector is driven directly by the one or more piezoelectric stacks without additional amplification means or interposing elements while a flow area of the nozzle is variably adjustable to deliver controlled flow rates in a desired flow profile to improve engine performance and reduce emissions. The injector is configured to support required flow rates with minimal linear movement of the flow control member. The injector and drive electronics are configured to deliver higher frequency operation and response with increased operational stability due to minimal response lag.

INJECTION DEVICE HAVING IMPROVED SPRAY PREPARATION

An injection device having at least one first spray hole and one second spray hole, which form a spray hole pair, the first and the second spray holes being situated so that a distance between the two spray holes is less than, or equal to twice a maximum opening edge distance at an inflow side of the two spray holes, and the spray hole axes of the first and the second spray holes being situated in directions that are different from each other. 113-. (canceled)14. An injection device for injecting a fluid , particularly fuel , comprising:an injection arrangement having at least one first spray hole and one second spray hole, which form a spray hole pair;wherein the first and the second spray holes are situated so that a distance between the two spray holes is less than or equal to twice the maximum opening edge distance at an inflow side of the two spray holes, andwherein the spray hole axes of the first and the second spray holes are situated in directions that are different from each other.15. The injection device of claim 14 , wherein the distance between the first spray hole and the second spray hole is in a range of 0.5 to 1.5 times the maximum opening edge distance of the first and/or the second spray hole.16. The injection device of claim 14 , wherein spray hole axes of the first and the second spray holes are situated at different angles of inclination.17. The injection device of claim 14 , wherein each spray hole has a spray hole axis claim 14 , which have the same angle of inclination claim 14 , but are directed in different directions.18. The injection device of claim 14 , wherein at least four spray holes are provided claim 14 , in each case two spray holes forming a spray hole pair.19. The injection device of claim 14 , wherein at least one of the spray holes has a shape that widens conically.20. The injection device of claim 14 , wherein the spray holes have a circular shape at the inflow side claim 14 , the maximum opening edge distance at the inflow ...

PRESSURE REGULATING VALVE

The invention relates to a pressure regulating valve for opening and closing a drain of a high-pressure accumulator () for an injection device for an internal combustion machine. The pressure regulating valve comprises a valve element () having a closing element () and a magnetic actuator () having an armature (), wherein the armature () acts on the closing element (), which closes or opens a hydraulic connection from the high-pressure accumulator () to a valve chamber (). The armature () comprises an armature plate () and an armature pin (), wherein the armature pin () is axially guided in a valve housing (). The armature pin () is implemented in two parts and has a transfer rod () and a pressure piece (). The pressure piece () is disposed on the transfer rod () in a radially displaceable manner at an axial offset V. 112182017322918122620261575323334203451525251. A pressure regulating valve for opening and closing an outlet of a high-pressure accumulator () for an injection device for an internal combustion engine , comprising a valve element () which is arranged in a valve housing () and which can be actuated by a magnet actuator () , said magnet actuator acting with an armature () on a closing element () of the valve element () , which closing element closes or opens up a hydraulic connection from the high-pressure accumulator () to a valve chamber () formed in the valve housing () , wherein the valve chamber () is hydraulically connected to a return port ( , ) , and wherein the armature () has an armature plate () and an armature pin () which is guided axially in the valve housing () , characterized in that the armature pin () is formed at least in two parts with a transition rod () and a thrust piece () , and the thrust piece () is arranged with an axial offset V , V′ and in a radially displaceable manner on the transmission rod ().25153607052. The pressure regulating valve according to claim 1 , characterized in that the transmission rod () has claim 1 , on an ...

Nozzle for skewed fuel injection

A nozzle for a fuel injector is disclosed. The nozzle may have a body having a base end, a tip end, and a central bore extending from the base end to the tip end. The nozzle may also have a sac located within the central bore at the tip end. Further, the nozzle may have an orifice located within the tip end and in communication with the sac. The orifice may be skewed at an azimuthal angle relative to a radial direction of the central bore.

FUEL INJECTION APPARATUS, A PISTON ENGINE AND METHOD OF OPERATING A PISTON ENGINE

A fuel injection apparatus for a piston engine includes a fuel injector body in which an injector needle is provided, which injector needle is arranged to prevent or allow fuel injection flow from the injection apparatus based on the position of the injector needle. The position is effected by a pressurized control fluid so that by applying the pressurized control fluid the needle may be urged towards its closed position and by reducing the pressurized control fluid the needle may be allowed to move away from its closed position. The injection apparatus includes a flow path for the control fluid, wherein the flow path for the control fluid comprises a restriction section providing a restriction effect to the control fluid flow. The restriction section includes at least one temperature-effected member providing a temperature-dependent restriction effect. 1. A fuel injection apparatus for a piston engine comprising:a fuel injector body in which an injector needle is provided, which injector needle is arranged to prevent or allow fuel injection flow from the injection apparatus based on the position of the injector needle, which position is effected by a pressurized control fluid in a control space;the fuel injector body comprising an injector space, into which the injector needle is arranged, which injector space is provided with a fuel inlet port and fuel injection spray hole orifices at a first end of the injector space, through which the fuel may be injected under control of the injector needle,wherein a second end of the injector needle is arranged to border a control space, which control space is connectable with a low pressure side of the fuel injection system via a flow path for the control fluid, wherein the flow path for the control fluid comprises a restriction section comprising at least two co-operative temperature-effected members, a first member of which has a different coefficient of thermal expansion than a second member of the members.2. A fuel ...

Method For Improving The Dimensional Accuracy Of A Fuel Injector Component, And Fuel Injector Component

In a final machining method for adapting a first surface of a fuel injector component to a second surface of said fuel injector component or of a second fuel injector component, or to a reference surface, e.g., for a common rail diesel injector with a register nozzle needle, the first surface and/or the second surface is deformed at least partially plastically in order to reduce a dimensional accuracy deviation which is possibly mutual. Furthermore, in a fuel injector component, e.g., a nozzle needle, nozzle needle sleeve, register nozzle needle, nozzle body, nozzle assembly and/or fuel injector, e.g., for a common rail injection system of a motor vehicle, a first surface of the fuel injector component and/or a second surface of said fuel injector component or of a second fuel injector component is deformed at least partially plastically in order to reduce a dimensional accuracy deviation. 1. A machining method for adapting a first surface of a fuel injector component to a second surface comprising one of (a) another surface of said fuel injector component , (b) a surface of a second fuel injector component , or (c) a reference surface , the method comprising:deforming at least one of the first surface and the second surface at least partially plastically in order to reduce a dimensional accuracy deviation of the at least one of the first and second surfaces from at least one predetermined dimension.2. The method of claim 1 , comprising deforming or reshaping the at least one of the first and second surface in such a way that a dimensional accuracy deviation of the fuel injector component or of the fuel injector component is reduced.3. The method of claim 1 , wherein the plastic deformation of the at least one of the first and second surface is effected without a removal of material claim 1 , and wherein the plastic deformation is effected by at least one of embossing claim 1 , compacting claim 1 , pre-embossing claim 1 , pressure forming claim 1 , or compression ...

NOZZLE AND METHOD OF MAKING SAME

Nozzle and a method of making the same are disclosed. The method includes (a) providing a microstructured mold pattern defining at least a portion of a mold and comprising a plurality of replica nozzle holes and replica planar control cavities; (b) molding a first material into a nozzle forming microstructured pattern using the microstructured mold pattern, with the nozzle forming microstructured pattern comprising a plurality of nozzle hole forming features and planar control cavity forming features; (c) forming a second material into a nozzle pre-form using the nozzle forming microstructured pattern, with the nozzle pre-form comprising a plurality of nozzle pre-form holes and sacrificial planar control cavities; and (d) forming a nozzle from the nozzle pre-form, said forming the nozzle comprising removing enough of the second material to remove the sacrificial planar control cavities so as to form a top surface of the nozzle pre-form into a planar top surface of the nozzle, and to form each of the nozzle pre-form holes into a nozzle through hole. 1. A method of making a nozzle , said method comprising:(a) providing a microstructured mold pattern defining at least a portion of a mold and comprising a plurality of replica nozzle holes and replica planar control cavities;(b) molding a first material into a nozzle forming microstructured pattern using the microstructured mold pattern, with the nozzle forming microstructured pattern comprising a plurality of nozzle hole forming features molded from the replica nozzle holes and planar control cavity forming features molded from the replica planar control cavities;(c) forming a second material into a nozzle pre-form using the nozzle forming microstructured pattern, with the nozzle pre-form comprising a plurality of nozzle pre-form holes formed from the nozzle hole forming features and sacrificial planar control cavities formed from the planar control cavity forming features; and(d) forming a nozzle from the nozzle pre- ...

Internal combustion engine

An internal combustion engine ( 1 ), preferably for a motor vehicle, having at least one cylinder ( 2 ) which encloses a combustion chamber ( 3 ) and in which a piston ( 4 ) is situated in such a way that it may perform a stroke movement, and having at least one injector ( 5 ) per cylinder for injecting fuel into the combustion chamber ( 3 ). The respective injector ( 5 ) has multiple injection openings ( 9, 10 ) through which the fuel exits from the injector ( 5 ) and enters into the combustion chamber ( 3 ). To be able to react more fuel, first injection openings ( 9 ) and second injection openings ( 10 ) are situated relative to one another in such a way that first injection jets ( 15 ) from the first injection openings ( 9 ) reach the piston ( 4 ) essentially without contacting second injection jets ( 18 ) from the second injection openings ( 10 ).

Two step metering solenoid for multi-physics fuel atomizer

A metering system for a fuel atomizer includes a housing, first and second metering members, and at least one solenoid. The housing includes a mixing chamber. The first metering member is operable to control flow of oxidizer to the mixing chamber. The second metering member is arranged coaxial with the first metering member and operable to control flow of fuel to the mixing chamber. The at least one solenoid is configured to operate at least one of the first and second metering members.

SOLENOID VALVE AND METHOD FOR PRODUCING SOLENOID VALVES

A solenoid valve for metering a fluid into an intake tract () of an engine, said solenoid valve comprising a solenoid assembly (), an armature () interacting with the solenoid assembly () and a stroke-movable valve disc () connected to the armature () for opening and closing at least one through-flow aperture () formed in a valve plate ().

FUEL INJECTION VALVE

A fuel injection valve includes a nozzle needle that opens or closes an injection hole communicating with an internal combustion engine, and a high-pressure fuel is introduced into a control room to urge the nozzle needle to close the injection hole. An orifice body includes a discharge passage through which the fuel is discharged from the control room to a low pressure portion, and an orifice-body sheet surface that is flat and surrounds a downstream end part of the discharge passage. A valve body contacts with or separates from the orifice-body sheet surface to close or open the discharge passage. A chamfered part is provided on a corner part in which the orifice-body sheet surface intersects with the discharge passage. 1. A fuel injection valve comprising:a nozzle needle that opens or closes an injection hole through which a fuel is injected into an internal combustion engine;a control room into which a high-pressure fuel is introduced to urge the nozzle needle in a valve closing direction;an orifice body including a discharge passage through which the fuel is discharged from the control room to a low pressure portion, and an orifice-body sheet surface that is flat and surrounds a downstream end part of the discharge passage;a valve body that contacts with or separates from the orifice-body sheet surface to close or open the discharge passage; anda chamfered part provided on a corner part in which the orifice-body sheet surface intersects with the discharge passage.2. The fuel injection valve according to claim 1 , wherein the valve body includes a valve-body sheet surface that is flat and contacts with or separates from the orifice-body sheet surface.3. The fuel injection valve according to claim 1 , wherein the chamfered part is a tapered surface inclined at an angle other than 45° with respect to the orifice-body sheet surface.4. The fuel injection valve according to claim 3 , whereina largest diameter of the chamfered part is defined as D1,a smallest diameter ...

FUEL INJECTOR AND METHOD

Embodiments may provide a fuel injector including a nozzle body having one or more nozzles, each capable of spraying a fuel from a respective spray position, and movable to change the spray position from a first position to a second position. An injector needle may be configured for axial movement relative to the nozzle body from an engaged position, to prevent flow through the one or more nozzles, to a disengaged position. The movement of the one or more nozzles from the first position to the second position and then back to the first position may substantially correspond with, and/or may be substantially be determined by, the relative axial movement between the injector needle and the nozzle body from the engaged position to the disengaged position and then back to the engaged position. 1. A fuel injector comprising:a nozzle body having one or more nozzles each capable of spraying a fuel from a respective spray position, the nozzle body being movable to change the spray position from a first position to a second position relative to a fixed point;an injector needle configured for axial movement relative to the nozzle body from an engaged position preventing flow through the one or more nozzles to a disengaged position allowing flow through the one or more nozzles; andwherein the movement of the one or more nozzles from the first position to the second position and then back to the first position substantially corresponds with, and/or is substantially determined by, the relative axial movement between the injector needle and the nozzle body from the engaged position to the disengaged position and then back to the engaged position.2. The fuel injector of claim 1 , wherein the movement of the spray position from the first position to the second position is along a fixed path in a first direction claim 1 , and wherein the movement of the spray position from the second position to the first position is along the fixed path in a second direction opposite the first ...

Fuel injector

Exemplary fuel injectors for use in fuel injection devices are disclosed. An injector may have a control chamber, which can be selectively relieved of pressure by means of a pilot valve in order to control a nozzle needle stroke of an axially displaceable nozzle needle of the injector. The fuel injector may have at least one nozzle on a first end, and the control chamber on a second end of the nozzle needle. The control chamber may be sub-divided by a throttle plate accommodated therein into a first chamber and a second chamber, with the second chamber being positioned closer to the nozzle, and the two chambers communicating with each other via the throttle plate. First and second resilient elements may be accommodated in a pre-stressed manner against the throttle plate in the first chamber and in the second chamber, respectively.

Fuel Injector With Precluded Fuel Flow at Sac Volume

A fuel injector for an internal combustion engine. The fuel injector has a needle and a nozzle that inter-relate with each other in assembly. Relative movement between the needle and nozzle bring the fuel injector between a closed state of operation and an open state of operation amid use of the fuel injector. The nozzle has one or more passages therein through which fuel is discharged. Fuel flow is precluded at a sac volume of the fuel injector. 1. A fuel injector , comprising:a needle; anda nozzle receiving the needle and having at least one passage for discharged fuel flow;wherein, during use of the fuel injector, when the fuel injector is in an open state of operation and when the fuel injector is in a closed state of operation, fuel flow at a sac volume is precluded.2. The fuel injector of claim 1 , wherein the needle has a recess defined inboard of the needle claim 1 , the nozzle has a projection extending inboard of the nozzle claim 1 , and the recess receives the projection when the fuel injector is in the closed state of operation.3. The fuel injector of claim 2 , wherein the recess receives the projection when the fuel injector is in the open state of operation.4. The fuel injector of claim 3 , wherein the recess resides at an axially-central region of the needle claim 3 , and the preclusion of fuel flow is effected via the recess-projection receipt at the axially-central region.5. The fuel injector of claim 1 , wherein the needle has at least one protuberance extending outboard of the needle claim 1 , and at least a section of the at least one protuberance spans through an inlet orifice of the at least one passage when the fuel injector is in the open state of operation.6. The fuel injector of claim 5 , wherein the at least section of the at least one protuberance spans into the at least one passage claim 5 , and wherein the at least section of the at least one protuberance remains into the at least one passage when the fuel injector is in the open state ...

FUEL INJECTION DEVICE

An object of the present invention is to provide a fuel injection device in which variations in an injection flow rate for each injection is suppressed and an injection amount is stabilized. 1. A fuel injection device comprising:a valve element that is seated on or unseated from a valve seat;a plurality of guide parts that slidably guide the valve element; anda flow path sandwiched between the guide parts in a circumferential direction, whereinone guide part among the plurality of guide parts is formed to have a longer circumferential length than that of another guide part.2. The fuel injection device according to claim 1 , comprisinga plurality of fuel injection holes arranged circumferentially, whereina fuel injection hole disposed on an opposite side to the guide part having a longest circumferential length among the plurality of fuel injection holes is formed to have a smaller angle formed between a central axis of the fuel injection hole and a central axis of the valve element than that of a fuel injection hole disposed on the guide part side having the longest circumferential length.3. The fuel injection device according to claim 1 , comprisinga plurality of fuel injection holes arranged circumferentially, whereina fuel injection hole disposed on an opposite side to the guide part having a longest circumferential length among the plurality of fuel injection holes is formed to have a smaller angle formed between a central axis of the fuel injection hole and a central axis of the valve element than that of another fuel injection hole.4. The fuel injection device according to claim 1 , comprisinga plurality of fuel injection holes arranged circumferentially, whereinthe plurality of fuel injection holes are arranged such that a number of the fuel injection holes arranged on the guide part side having a longest circumferential length is less than a number of the fuel injection holes arranged on an opposite side to the guide part having the longest circumferential ...

FUEL INJECTION DEVICE

In an injection hole set, primary and secondary injection holes are formed to satisfy the following relationship: γ≤θt1+θt2−0.87×P̂0.52, where γ (deg) is an injection-hole-to-injection-hole angle, which is an angle formed between a primary central axis of the primary injection hole and a secondary central axis of the secondary injection hole; θt1 (deg) is a primary taper angle, which is an angle formed between outlines of a primary injection hole inner wall of the primary injection hole in a cross section of the primary injection hole inner wall; θt2 (deg) is a secondary taper angle, which is an angle formed between outlines of a secondary injection hole inner wall of the secondary injection hole in a cross section of the secondary injection hole inner wall; and P (MPa) is an average pressure of the fuel in a fuel passage at a time of injecting the fuel from the injection holes. 15-. (canceled)7. The fuel injection device according to claim 6 , wherein the primary injection hole and the secondary injection hole are adjacent to each other in a circumferential direction of the nozzle bottom portion.8. The fuel injection device according to claim 6 , wherein the primary injection hole and the secondary injection hole are formed to satisfy a relationship of the following equation 2:{'br': None, 'i': t', 't, 'θ1+θ2−10≤γ\u2003\u2003Equation 2.'}9. The fuel injection device according to claim 6 , wherein:the at least one injection hole set of the plurality of injection holes includes a plurality of injection hole sets; the primary central axis or the secondary central axis of a first injection hole set, which is a selected one that is selected from the plurality of injection hole sets; and', 'the primary central axis or the secondary central axis of a second injection hole set, which is a different injection hole set that is different from the first injection hole set among the plurality of injection hole sets; and, 'α (deg) is defined as a hole-set-to-hole-set angle that ...

FUEL INJECTOR FOR INTERNAL COMBUSTION ENGINES

A fuel injector for an internal combustion engine is disclosed. The fuel injector includes a body defining an orifice. The orifice is configured to provide passage to a fuel into a combustion chamber of the internal combustion engine. The orifice includes an inlet port having a first oval shape and an outlet port having a second oval shape. The second al shape is orthogonal to the first oval shape. Moreover, a transition from the first oval shape to the second oval shape defines a stagnation plane, facilitating an exit of the fuel as a fan spray from the outlet port. 1. A fuel injector for an internal combustion engine , the fuel injector comprising: an inlet port having a first oval shape; and', 'an outlet port having a second oval shape orthogonal to the first oval shape, wherein a transition from the first oval shape to the second oval shape defines a stagnation plane, facilitating an exit of the fuel as a fan spray from the outlet port., 'a body defining an orifice configured to provide passage to a fuel into a combustion chamber of the internal combustion engine, the orifice including2. The fuel injector of claim 1 , wherein the orifice defines an axis claim 1 , and the transition from the first oval shape to the second oval shape is defined along the axis.3. The fuel injector of claim 1 , wherein the orifice defines an axis and an axial end claim 1 , the second oval shape being orthogonal to the first oval shape from the axial end.4. The fuel injector of claim 3 , wherein the second oval shape being orthogonal to the first oval shape corresponds to a major inlet axis of the first oval shape being tilted at a right angle relative to a major outlet axis of the second oval shape claim 3 , from the axial end.5. The fuel injector of claim 1 , wherein the orifice has a larger cross-sectional area at the inlet port having the first oval shape than at the outlet port having the second oval shape.6. The fuel injector of claim 1 , wherein the first oval shape and the ...

PRE-CHAMBER TYPE DIESEL ENGINE

Provided is a pre-chamber type diesel engine in which fuel injected from an injector mixes satisfactorily with air in a pre-combustion chamber. A corner space section, in which a forced vortex is formed by a flow of air advancing into a pre-combustion chamber from a main combustion chamber via a connecting hole during the compression stroke of a piston, is provided at a prescribed position between the line of extension of the connecting hole and the wall surface of the pre-combustion chamber. 1. A pre-chamber type diesel engine , comprising a main combustion chamber and a pre-combustion chamber that communicates by a connecting hole and an injector that injects fuel into the pre-combustion chamber , whereinthe connecting hole extends with inclination with respect to a reciprocating motion direction of a piston, andbetween an extension line of the connecting hole and a wall surface of the pre-combustion chamber, a corner space section is provided in which a forced vortex is formed by an air flow that has entered the pre-combustion chamber through the connecting hole from the main combustion chamber in a compression stroke of the piston.2. The pre-chamber type diesel engine according to claim 1 , whereinthe pre-combustion chamber comprises a hemispherical main portion and an inverted truncated cone-shaped portion connected to an annular open end edge of the main portion, andan opening on a pre-combustion chamber side of the connecting hole is provided so as to be offset inward from an inner side surface of the inverted truncated cone-shaped portion.3. The pre-chamber type diesel engine according to claim 1 , wherein the injector injects fuel toward the corner space section.4. The pre-chamber type diesel engine according to claim 3 , wherein an injection center axis of the fuel injected from the injector is inclined by 20 to 45 degrees with respect to a compression motion direction of the piston in a vertical cross-sectional view passing through a communication hole.5. ...

Fuel injection valve

Injection holes of an injection nozzle are respectively formed such that an inner diameter of an outer opening is larger than an inner diameter of an inner opening. Furthermore, the injection holes are formed such that when an imaginary plane, which includes a valve seat portion that is a portion of a valve seat and is adjacent to the injection hole, is extended toward a central axis, the imaginary plane first intersects with an injection hole inner wall portion of an injection hole inner wall of the injection hole.

FUEL-INJECTION METERING DEVICE, FUEL-INJECTION NOZZLE, MOULD FOR PRODUCING A FUEL-INJECTION METERING DEVICE AND METHOD FOR PRODUCING A FUEL-INJECTION METERING DEVICE

The present application concerns a fuel-injection metering device for a motor vehicle. The fuel-injection device include a main body with at least one through-hole, whereby the main body forms a valve seat on its inner face that is provided to interact with a valve body, whereby the inner face of the main body is electrochemically machined. The application also concerns a mould, a production method, and a fuel-injection nozzle. 1. Fuel-injection metering device for a motor vehicle which comprises a main body with at least one through-hole , whereby the main body forms a valve seat on its inner face which is provided to interact with a valve body in order to seal and open the through-hole , and whereby several longitudinal grooves extending in a radial direction are provided on the inner face of the main body which are separated by ridges and the inner face of the main body is electrochemically machined , characterized in that the ridges are electrochemically rounded in the transition area to the longitudinal grooves).2. Fuel-injection metering device according to claim 1 , characterized in that one or more longitudinal grooves extending in a radial direction are provided on the inner face of the main body by means of an electrochemical machining method.3. Fuel-injection nozzle with a fuel-injection metering device according to claim 1 , and a valve body which is axially movable inside it in the manner of a sphere or in the manner of a tappet with a preferably round claim 1 , concave claim 1 , spherical or sphere-section-like shape at the tip.4. Fuel-injection nozzle according to claim 3 , characterized in that the main body of the fuel-injection metering device is inserted in the end of a valve sleeve in a firmly bonded claim 3 , positive-locking or force-fitting manner.5. Fuel-injection nozzle according to claim 3 , characterized in that the valve body shaped as a sphere is of a separate material from a needle which can be brought into contact with it as necessary ...

FUEL INJECTION VALVE

Recent exhaust gas regulation requires reduction of an amount and quantity of particulate matter included in an exhaust gas, and a normal maximum fuel pressure may be increased to approximately 35 MP. When the normal maximum fuel pressure is 35 MPa, a fuel injection valve is required to work for example at a pressure up to 45 MPa. In such a condition, a fluid force may exceed a valve opening force depending on a seat diameter, and a needle valve cannot be kept open and closed, when opening thereof is required. 1. A fuel injection valve , comprising:a valve seat portion;a valve body which is seated on or separated from the valve seat portion;an injection hole which is formed on a downstream side from the valve seat portion; anda guide portion which is formed on an upstream side from the valve seat portion seating a valve body seat portion of the valve body to guide a guided portion on a downstream side of the valve body,wherein the valve seat portion is formed to have a dimension in a crossing direction crossing an axial direction of 0.4 to 0.8 times a dimension of the guide portion in the crossing direction.2. A fuel injection valve comprising:a valve seat;a valve body which is seated on or separated from the valve seat;an injection hole which is formed on a downstream side of the valve seat; anda guide portion which is formed on an upstream side from a valve seat portion of the valve seat seating the valve body to guide a guided portion on a downstream side of the valve body,wherein the valve body seat portion is formed to have a dimension in a crossing direction crossing an axial direction of 0.4 to 0.8 times a dimension of the guided portion in the crossing direction.3. The fuel injection valve according to claim 1 , wherein the valve body seat portion has a diameter of 0.4 to 0.8 times a diameter of the guided portion.4. A fuel injection valve comprising:a valve seat;a valve body which is seated on or separated from the valve seat;an injection hole which is ...

VALVE FOR METERING A FLUID, IN PARTICULAR, A FUEL INJECTOR

The valve according to the present invention, in particular, a fuel injector, is characterized by having an improved sealing at its spray-side end. The fuel injector () includes an excitable actuator () for actuating a valve closing body (), which together with a valve seat surface () formed on a valve seat body () forms a seal seat, and spray openings () formed downstream of the valve seat surface (), and a valve seat support (), which accommodates the valve seat body (), forms a portion of a valve housing () and is fixedly connected to the valve seat body (). A plastically deformable sealing element () is introduced into an annular gap () between the valve seat support () and the valve seat body () to avoid corrosion and damage of a weld seam (). The fuel injector is particularly suitable for directly injecting fuel into a combustion chamber of a mixture-compressing spark ignition internal combustion engine. 110-. (canceled)11. A valve for metering a fluid , comprising:an excitable actuator configured to actuate a valve closing body, the valve closing body together with a valve seat surface formed on a valve seat body forming a seal seat;at least one spray opening formed downstream of the valve seat surface;a valve seat support, which accommodates the valve seat body, forms a portion of a valve housing and is fixedly connected to the valve seat body; anda deformable sealing element situated in an annular gap between the valve seat support and the valve seat body.12. The valve as recited in claim 11 , wherein the valve is a fuel injector for directly injecting fuel into a combustion chamber for a fuel injection system of an internal combustion engine.13. The valve as recited in claim 11 , wherein the sealing element is plastically deformed in an installed state compared to a state before installation of the sealing element.14. The valve as recited in claim 11 , wherein the valve seat body claim 11 , on its side opposite the spray openings claim 11 , includes an ...

COMPRESSION-IGNITION INTERNAL COMBUSTION ENGINE

A compression-ignition internal combustion engine includes a fuel injection nozzle including a tip end portion exposed in a combustion chamber and a nozzle hole formed at the tip end portion; and a passage forming member forming a flow guide passage through which fuel injected from the nozzle hole passes. The passage forming member includes a passage wall portion located radially outward of the flow guide passage. The passage wall portion includes a first layer that is a base portion connected to a cylinder head, and a second layer located radially outward or radially inward of the first layer. The toughness of the first layer is higher than the toughness of the second layer. The thermal conductivity of the second layer is lower than the thermal conductivity of the first layer. 1. A compression-ignition internal combustion engine , comprising:a fuel injection nozzle including a tip end portion exposed in a combustion chamber and a nozzle hole formed at the tip end portion; anda passage forming member forming a flow guide passage through which fuel injected from the nozzle hole passes,wherein the passage forming member includes a passage wall portion located radially outward of the flow guide passage,wherein the passage wall portion includes a first layer that is a base portion connected to a cylinder head, and a second layer located radially outward or radially inward of the first layer,wherein a toughness of the first layer is higher than a toughness of the second layer, andwherein a thermal conductivity of the second layer is lower than a thermal conductivity of the first layer.2. The compression-ignition internal combustion engine according to claim 1 ,wherein the second layer is located radially outward of the first layer.3. The compression-ignition internal combustion engine according to claim 1 ,wherein a gap is formed between an outlet of the nozzle hole and an inlet of the flow guide passage, andwherein a heat capacity per unit volume of the second layer is ...

Control Valve Assembly And Fuel Injector Incorporating A Control Valve Assembly

A control valve assembly for controlling fuel pressure in a control chamber of a fuel injector. The control valve assembly comprising a valve member arranged in a bore provided in a valve housing, at least one of the valve member and the valve housing being moveable with respect to the other, wherein the valve member comprises a fuel-receiving cavity arranged to receive fuel that distorts at least a portion of the valve member so as to increase an external dimension thereof.

Nozzle Body, The Valve Assembly And Fluid Injection Valve

A nozzle body for a fluid injection includes a cavity and a bottom wall delimiting the cavity at a fluid outlet end. The bottom wall is perforated by an injection hole having an inlet opening at an inner surface of the bottom wall and an outlet opening at an outer surface of the bottom wall. The outlet opening has an elongated slit shape having a centerline which is a circular arc with respect to the longitudinal axis. The inlet opening is spaced apart from the longitudinal axis by a radial distance. The inner surface has a concave shape extending away from the fluid outlet end from an apex of the inner surface. Further, the inlet opening is spaced apart from the apex by an axial distance that is smaller than said radial distance.

Fuel injector spray pattern

A fuel injector having an injector axis, comprising a first nozzle aiming in a first radial direction; a first nozzle pair aiming in radial directions each equally angled relative to the first direction, closest to the first radial direction, and having a longest radial offset; a nozzle second pair in radial directions each equally angled relative to the first direction; and another nozzle aiming opposite the first radial direction and having a shortest radial offset.

Fuel injector nozzle

A fuel injector includes a needle moveable along a central axis to initiate and terminate an injection event, and a nozzle body that receives the needle. The nozzle body includes a needle seat, a nozzle sac, and a passageway between the needle seat and the nozzle sac. The passageway defines a passageway inner surface. The nozzle sac has a curved, non-spherical profile and defines a sac inner surface that extends away from a distal end of the passageway inner surface.

MULTI-DIMPLE ORIFICE DISC FOR A FLUID INJECTOR, AND METHODS FOR CONSTRUCTING AND UTILIZING SAME

A fluid injector for injecting fluid is disclosed, including a body, a fluid passageway defined through the body and extending from an inlet to an outlet of the fluid injector; a valve seat disposed internally of the body and forming part of the passageway; and a valve element that is selectively reciprocated relative to the valve seat to close and open the passageway to the flow of fluid by seating and unseating the valve element on and from the valve seat, respectively. The fluid injector further includes an orifice disc disposed in the passageway downstream of the valve seat in a direction of the flow of fluid through the fluid injector. The orifice disc includes a plurality of dimples and a plurality of orifices defined through the orifice disc, with each dimple including at least one orifice defined therethrough. 1. A fluid injector for injecting fluid , comprising:a body;a fluid passageway defined in the body and extending from an inlet to an outlet of the fluid injector;a valve seat disposed internally of the body and forming part of the passageway;a valve element that is selectively reciprocated relative to the valve seat to close and open the passageway to fluid flow by seating and unseating the valve element on and from the valve seat, respectively; andan orifice disc disposed in the passageway downstream of the valve seat in a direction of the fluid flow through the fluid injector, the orifice disc including a plurality of dimples and a plurality of orifices defined through the orifice disc, each dimple including at least one orifice located thereon.2. The fluid injector of claim 1 , wherein each dimple includes a single orifice located thereon.3. The fluid injector of claim 1 , wherein each dimple is dome shaped.4. The fluid injector of claim 3 , wherein the plurality of dimples are the same size.5. The fluid injector of claim 3 , wherein the plurality of dimples have at least one of the same diameter and the same depth.6. The fluid injector of claim 3 , ...

Fuel Injector

A fuel injection valve includes: a swirl chamber having an inner peripheral wall formed to be gradually increased in curvature toward a downstream side from an upstream side; a swirl passage, through which a fuel is introduced into the swirl chamber; and a fuel injection port opened to the swirl chamber, wherein the swirl chamber and the swirl passage are formed so that a side wall of the swirl passage connected to a downstream end side of the swirl chamber, or an extension thereof is made not to intersect a downstream side portion of the inner peripheral wall of the swirl chamber, or an extension thereof,

FUEL INJECTOR

A fuel injector for supplying fuel to a fuel consuming devise includes a fuel inlet for receiving the fuel, a nozzle tip for dispensing the fuel from the fuel injector, a conduit for communicating the fuel from the fuel inlet to the nozzle tip, a valve seat, and a valve selectively seatable and unseatable with the valve seat for selectively preventing and permitting fuel flow out of the nozzle tip. The nozzle tip includes a non-circular recess on a downstream side thereof and a metering hole on an upstream side thereof opening into the non-circular recess to allow fuel to exit the nozzle tip, the metering hole having a smaller area than the non-circular recess. 1. A fuel injector for supplying fuel to a fuel consuming device , said fuel injector comprising:a fuel inlet for receiving fuel;a nozzle tip for dispensing fuel from said fuel injector;a conduit for communicating fuel from said fuel inlet to said nozzle tip a valve seat; anda valve member selectively seatable and unseatable with said valve seat for selectively preventing and permitting fuel to flow from said fuel inlet out of said nozzle tip;wherein said nozzle tip comprises a non-circular recess on a downstream side thereof and a metering hole on an upstream side thereof opening into said non-circular recess to allow fuel to exit said nozzle tip, said metering hole having a smaller area than said non-circular recess.2. A fuel injector as in wherein said non-circular recess in an arc-shaped recess.3. A fuel injector as in wherein said metering hole is circular.4. A fuel injector as in wherein said metering hole is one of a plurality of metering holes and each of said plurality of metering holes is circular.5. A fuel injector as in wherein said valve member reciprocates along a fuel injector axis and said arc-shaped recess is centered on a circular centerline which is centered about said fuel injector axis.6. A fuel injector as in wherein said metering hole is centered on said circular centerline.7. A fuel ...

FUEL INJECTION NOZZLE

A Laval shape is formed between the nozzle seat surface and needle tip portion. An injection hole also has the Laval shape. When the needle lift amount is small, a fuel flow velocity reaches an acoustic velocity in valve-opening portion. The fuel flow velocity further accelerated to a supersonic velocity at the Laval shape. When the needle lift amount is large, the fuel flows into the injection hole without a velocity decrease. Thus, the fuel flow velocity reaches the supersonic velocity at the Laval shape. 1. A fuel injection nozzle comprising:a nozzle body defining a space which receives a pressurized fuel therein;a needle reciprocating in the space; andan injection hole formed in the nozzle body, which is opened/closed by the needle; whereinthe nozzle body has a nozzle seat surface on which the needle sits,the needle has a needle tip portion including a needle seat portion which sits on the nozzle seat surface, anda shape between the nozzle seat surface and the needle tip portion downstream of the needle seat portion is defined by a Laval shape where a fuel fluid is accelerated to a supersonic velocity.2. A fuel injection nozzle according to claim 1 , whereinan opening area between the nozzle seat surface and the needle tip portion is denoted by “An”,a total passage sectional area of the injection hole is denoted by “Ah”,when “0 Подробнее

FLUID INJECTOR

A fuel injector includes an injector tip defining a plurality of injection apertures. A first control device is coupled to the injector tip, and is operable to control fluid flow through at least a first one of the plurality of injection apertures. A second control device is coupled to the injector tip, and is operable to control fluid flow through at least a second one of the plurality of injection apertures. The first control device and the second control device each include a MEMS or a NEMS flow controller for controlling fluid flow through a respective injection aperture, and are independently operable relative to each other to provide variable fluid flow rates and/or injection spray patterns. 1. A fluid injector comprising:an injector tip defining a plurality of injection apertures;a first control device coupled to the injector tip and operable to control fluid flow through at least a first one of the plurality of injection apertures; anda second control device coupled to the injector tip and operable to control fluid flow through at least a second one of the plurality of injection apertures;wherein the first control device and the second control device are independently operable relative to each other, such that one of the first one of the plurality of injection apertures and the second one of the plurality of injection apertures may be opened to allow fluid flow therethrough, while the other of the first one of the plurality of injection apertures and the second one of the plurality of injection apertures may be simultaneously closed to prevent fluid flow therethrough.2. The fluid injector set forth in wherein each of the first control device and the second control device includes one of either a Micro-Electrical-Mechanical System (MEMS) flow controller or a Nano-Electrical-Mechanical System (NEMS) flow controller.3. The fluid injector set forth in wherein the first one of the plurality of injection apertures defines a first injection area capable of ...

INJECTOR VALVE

In some embodiments, the injector valves have additional flow holes in the seat face to reduce flow variation, decrease package size and allow for a fast response. In another embodiment, the injector valve has a seat with multiple flow channels leading to a venturi, allowing for a fast response and decreased package size. 1. An injector valve for an engine comprising:a cartridge body having a first bore and a second bore; a tubular casing received within the first bore of the cartridge body surrounding at least one coil of conductive material electrically coupled to a power source; and', 'a moveable armature received within the second bore of the cartridge body and subject to flux generated by the at least one coil when powered by the power source, the armature comprising a first face, a second face having a seal insert, and a through hole extending from the first face to the second face;, 'a solenoid assembly received within the cartridge body comprising [ a body having an inlet side and an outlet side and a bore coaxial with the through hole of the movable armature; and', 'at least a first seat flow passage within the body extending from the inlet side to at least a first set of flow holes on the outlet side of the body; and, 'a valve seat comprising, 'a spring with a first end retained within the moveable armature and a second end retained within the valve seat, the spring biasing the armature towards the valve seat, such that the second face of the armature with the seal insert seals at least the first seat flow passage of the valve seat; and, 'a valve assembly received within the second bore of the cartridge body comprisingan inlet passage for fluid communication with a pressurized source of fluid, coupled at least to the first seat flow passage;wherein when the at least one coil is energized by the electrical energy source, the armature moves away from the valve seat within the second bore of the cartridge body, overcoming a force of the spring, such that ...

ELECTROMAGNETICALLY ACTUATABLE METERING VALVE, METHOD FOR OPERATING AN ELECTROMAGNETICALLY ACTUATABLE METERING VALVE

The invention relates to an electromagnetically actuatable metering valve for liquids and/or gases, comprising: a valve housing (); a valve seat element () which is connected to the valve housing () and in which at least one outlet opening () is formed; and a magnetic armature () which can move in a stroke-like manner relative to the valve seat element () and which is securely connected to a plate- or disc-shaped valve closing element () for opening and closing the at least one outlet opening () or which forms same; as well as a magnetic core () opposite the magnetic armature () at a working air gap () and at least one spring () pretensioning the magnetic armature () and the valve closing element () in the closing direction. According to the invention, the magnetic armature () and the valve closing element () are loaded in a targeted asymmetrical manner and/or are shaped in a targeted asymmetrical manner The invention also relates to a method for operating a metering valve for liquids and/or gases. 1121342536414745. An electromagnetically actuatable metering valve for liquids and/or gases , the metering valve comprising a valve housing () , a valve seat element () which is connected to the valve housing () and in which at least one outlet opening () is formed , and a magnetic armature () which is configured to move in a stroke-like manner relative to the valve seat element () and which is securely connected to a plate- or disc-shaped valve closing element () for opening and closing the at least one outlet opening () , a magnetic core () opposite the magnetic armature () at a working air gap () and at least one spring () pretensioning the magnetic armature () and the valve closing element () in a closing direction ,{'b': 4', '5, 'characterized in that the magnetic armature () and the valve closing element () are loaded in a targeted asymmetrical manner and/or are shaped in a targeted asymmetrical manner.'}245. The metering valve as claimed in claim 1 , characterized ...

TWIN OUTLET CHECK LIQUID FUEL INJECTOR FOR DUAL FUEL SYSTEM

A liquid fuel injector such as for a dual fuel system in an internal combustion engine includes two-way injection control valves for controlling twin outlet checks. A first set of orifices are arranged in an A-F-Z pattern, and a second set of orifices are arranged in an A-F-Z pattern, within the fuel injector, among a high-pressure inlet passage, a low-pressure space, and first and second outlet check control chambers, respectively. A common nozzle supply cavity is fluidly connected to the high-pressure inlet passage and supplies each of two sets of nozzle outlets opened and closed by the twin outlet checks. 1. A liquid fuel injector for an internal combustion engine comprising:an injector body defining a high pressure inlet passage, a first set of nozzle outlets, a second set of nozzle outlets, a first control chamber and a second control chamber each in fluid communication with the high pressure inlet passage, and a low pressure space;a first outlet check having a closing hydraulic surface exposed to a fluid pressure of the first control chamber and movable between a closed position blocking the first set of nozzle outlets, and an open position;a second outlet check having a closing hydraulic surface exposed to a fluid pressure of the second control chamber and movable between a closed position blocking the second set of nozzle outlets, and an open position;a first two-way injection control valve positioned fluidly between the first control chamber and the low pressure space;a second two-way injection control valve positioned fluidly between the second control chamber and the low pressure space;the injector body further defining a first set of orifices arranged in an A-F-Z pattern among the high pressure inlet passage, the low pressure space, and the first control chamber, and a second set of orifices arranged in an A-F-Z pattern among the high pressure inlet passage, the low pressure space, and the second control chamber; andthe injector body further defining a ...

FUEL INJECTOR WITH DIVIDED FLOWPATH NOZZLE

A fuel delivery system and a direct injector for directly injecting fuel into a cylinder are provided. In one example, a direct fuel injector includes a nozzle in fluidic communication with a fuel source, the nozzle includes at least one fuel flow path that divides into two exit flow paths within the nozzle defining a plurality of exit orifices stemming from a common inlet orifice thereby improving the atomization and mixing of the fuel as it enters the cylinder. A plurality of spaced-apart divided fuel flow paths may be positioned within the nozzle to further optimize mixing and reduce wall and piston wetting. 1. A direct fuel injector comprising: an intake side and an opposite exhaust side;', 'a fuel flow path for transmitting fuel from the fuel source therethrough, the fuel flow path extending through the nozzle from an inlet orifice on the intake side to the exhaust side; and,', 'a divider within the fuel flow path for dividing the fuel flow path into a least two fuel exit flow paths, each fuel exit flow path defining an exit orifice on the exhaust side of the nozzle., 'a nozzle in fluid communication with a fuel source, including;'}2. The direct fuel injector of claim 1 , wherein the divider is substantially wedge shaped.3. The direct fuel injector of claim 1 , wherein the divider is substantially rectangular shaped.4. The direct fuel injector of claim 1 , wherein the inlet orifice has a cross-sectional area that is larger than the cross-sectional area than one of said exhibit orifices.5. The direct fuel injector of claim 1 , wherein the cross-sectional ratio of all exit orifices and the inlet orifice is less than or equal to 2.6. The direct fuel injector of claim 4 , wherein the cross-sectional area of the inlet orifice is smaller than the combined cross-sectional area of all exit orifices in flued communication with the inlet orifice.7. The direct fuel injector of claim 1 , wherein the fuel flow path is substantially Y-shaped defining an upstream flow path ...

FUEL INJECTION CONTROL DEVICE FOR ENGINE

A fuel injection control device for an engine is provided. A swirl generator generates a swirl flow inside a combustion chamber. A fuel injector with multiple nozzle holes injects fuel into the combustion chamber, and forms a lean mixture gas inside the combustion chamber. An spark plug ignites the lean mixture gas to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and then combusts by self-ignition. The fuel injector has first and second nozzle holes, and a first atomized fuel spray injected from the first nozzle hole and a second atomized fuel spray injected from the second nozzle hole separate from each other by the swirl flow. The fuel injector sequentially performs a first injection and a second injection in an intake stroke. The controller makes an injection amount of the second injection greater than that of the first injection. 1. A fuel injection control device , comprising:an engine having a cylinder forming a combustion chamber;a swirl generator attached to the engine and configured to generate a swirl flow inside the combustion chamber;a fuel injector with multiple nozzle holes, attached to the engine and configured to inject fuel into the combustion chamber through the nozzle holes;a spark plug attached to the engine and configured to ignite a mixture gas inside the combustion chamber; anda controller connected to the swirl generator, the fuel injector, and the spark plug, and configured to output respective control signals to the swirl generator, the fuel injector, and the spark plug,wherein the fuel injector forms the mixture gas leaner than a stoichiometric air-fuel ratio inside the combustion chamber in response to the respective control signal,wherein the spark plug ignites the lean mixture gas at a given timing in response to the respective control signal to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and the remaining unburnt mixture gas then combusts by self- ...

FUEL INJECTION CONTROL DEVICE FOR ENGINE

A fuel injection control device for an engine is provided. A swirl generator generates a swirl flow inside a combustion chamber. A fuel injector with multiple nozzle holes injects fuel into the combustion chamber, and forms a lean mixture gas inside the combustion chamber. A spark plug ignites the lean mixture gas to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and then combusts by self-ignition. The fuel injector has first and second nozzle holes, and a first atomized fuel spray injected from the first nozzle hole and a second atomized fuel spray injected from the second nozzle hole separate from each other by the swirl flow. The fuel injector performs the fuel injection in an intake stroke, and retards a start timing of the injection when an engine load is high compared to that when the load is low. 1. A fuel injection control device , comprising:an engine having a cylinder forming a combustion chamber;a swirl generator attached to the engine and configured to generate a swirl flow inside the combustion chamber;a fuel injector with multiple nozzle holes, attached to the engine and configured to inject fuel into the combustion chamber through the nozzle holes;a spark plug attached to the engine and configured to ignite a mixture gas inside the combustion chamber; anda controller connected to the swirl generator, the fuel injector, and the spark plug, and configured to output respective control signals to the swirl generator, the fuel injector, and the spark plug,wherein the fuel injector forms the mixture gas leaner than a stoichiometric air-fuel ratio inside the combustion chamber in response to the respective control signal,wherein the spark plug ignites the lean mixture gas at a given timing in response to the respective control signal to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and the remaining unburnt mixture gas then combusts by self-ignition,wherein the fuel injector ...

VEHICLE FUEL INJECTOR

A vehicle fuel injector is configured to inject a high-pressure vehicle fuel received from a fuel rail into a combustion chamber. The vehicle fuel injector includes a nozzle which includes a plurality of discharge flow paths which are disposed to be spaced apart from each other in a circumferential direction and pass through the nozzle in a longitudinal direction, and outward flow paths formed on an inner circumferential surface of the nozzle, the nozzle having a hollow shape, and a needle bar which is formed to pass through the inner circumferential surface of the nozzle and vertically reciprocally moves on the inner circumferential surface of the nozzle, where rotation of the needle bar is adjusted in a left or right direction so that the nozzle is opened or closed. 1. A vehicle fuel injector provided for injecting a high-pressure vehicle fuel received from a fuel rail into a combustion chamber , the vehicle fuel injector comprising:a nozzle which includes a plurality of discharge flow paths which are disposed to be spaced apart from each other in a circumferential direction and pass through the nozzle in a longitudinal direction, and outward flow paths formed on an inner circumferential surface of the nozzle, the nozzle having a hollow shape; anda needle bar which is formed to pass through the inner circumferential surface of the nozzle and vertically reciprocally moves on the inner circumferential surface of the nozzle, wherein rotation of the needle bar is adjusted in a left or right direction so that the nozzle is opened or closed.2. The vehicle fuel injector of claim 1 , wherein:the nozzle includes a guide protrusion formed to protrude from the inner circumferential surface of the nozzle;the needle bar includes a guide groove corresponding to the guide protrusion on an outer circumferential surface of the needle bar; andthe guide groove is concavely formed to be inclined in a downward direction and adjusts a rotation angle of the needle bar.3. The vehicle ...

METHOD FOR MANUFACTURING INJECTION OPENINGS AND FUEL INJECTOR HAVING SUCH INJECTION OPENINGS

A method for manufacturing injection openings of a fuel injector, including: manufacturing a prechamber with the aid of a mechanical, cutting method, in particular with the aid of milling or drilling or with the aid of laser ablation, producing a radius at the transition of the prechamber between a prechamber wall and a prechamber base with the aid of a laser, and/or introducing grooves into the prechamber wall and/or the prechamber base, and manufacturing a spray hole in the prechamber base. 110-. (canceled)11. A method for manufacturing injection openings of a fuel injector , the method comprising:producing a prechamber with the aid of a mechanical, cutting process or laser ablation;producing a radius at a transition of the prechamber between a prechamber wall and a prechamber base with the aid of a laser, and/or introducing grooves into the prechamber wall, and/or the prechamber base; andproducing a spray hole in the prechamber base.12. The method of claim 11 , wherein the spray hole is manufactured with the aid of the laser.13. The method of claim 11 , wherein material removal is also carried out on the prechamber base during production of the radius at the prechamber.14. The method of claim 11 , wherein grooves are introduced into the prechamber wall and/or in the prechamber base with the aid of the laser.15. The method of claim 14 , wherein the grooves are introduced as circumferential grooves.16. The method of claim 11 , wherein a second prechamber is introduced at a transition area between the prechamber and the spray hole claim 11 , a second radius being provided at the second prechamber at the transition area between the wall and the base.17. A fuel injector for metering fuel claim 11 , comprising:at least one injection opening having a prechamber and a spray hole; and a radius formed at the prechamber at a transition area between a prechamber wall and a prechamber base; and/', 'groove introduced into the prechamber wall and/or the prechamber base., 'at ...

FUEL INJECTION DEVICE

In a fuel injection device including a body portion that forms an injection hole through which a fuel is injected, the body portion includes an inlet-channel-forming portion that is connected to an inflow port of the fuel in the injection hole and forms an inlet channel which is a fuel flow channel, and an outlet-channel-forming portion that is connected to the inlet channel and an outflow port of the fuel in the injection hole, and forms an outlet channel that is a fuel flow channel. A surface roughness of the outlet-channel-forming portion is larger than a surface roughness of the inlet-channel-forming portion. 1. A fuel injection device comprising:a body portion which forms an injection hole through which a fuel is injected, wherein an inlet-channel-forming portion connected to an inflow port of the injection hole and forming an inlet channel of a fuel flow, and', 'an outlet-channel-forming portion connected to the inlet channel and an outflow port of the fuel in the injection hole and forming an outlet channel of the fuel flow, and, 'the body portion includesthe outlet-channel-forming portion has a surface roughness which is larger than a surface roughness of the inlet-channel-forming portion.2. The fuel injection device according to claim 1 , whereinthe outlet-channel-forming portion is provided with a plurality of convex portions or concave portions.3. The fuel injection device according to claim 1 , whereinmultiple grooves which extend from the inflow port to the outflow port are formed in the outlet-channel-forming portion in a circumferential direction.4. The fuel injection device according to claim 3 , whereineach of the multiple grooves is arranged in such a manner that an interval between adjacent grooves becomes longer along a direction from the inflow port toward the outflow port.5. The fuel injection device according to claim 3 , whereineach of the multiple grooves is arranged in such a manner that a depth of the grooves becomes deeper along a ...

Fuel injector and method for forming spray-discharge orifices

A fuel injector for fuel injection systems of internal combustion engines has an energizable actuator for actuating a valve-closure member, which, together with a valve seat face configured on a valve seat body, forms a sealing seat. Downstream of the valve seat face, a plurality of spray-discharge orifices are formed, which include one upstream, first spray-discharge orifice section and one downstream, second spray-discharge orifice section having different orifice widths. The orifice sections of the individual spray-discharge orifices extend coaxially to the particular longitudinal bore axis. The spray-discharge orifices are formed in a valve component manufactured as a metal injection molding part.

MULTI-DIMPLE ORIFICE DISC FOR A FLUID INJECTOR, AND METHODS FOR CONSTRUCTING AND UTILIZING SAME

A fluid injector for injecting fluid is disclosed, including a body; a fluid passageway defined in the body and extending from an inlet to an outlet of the fluid injector; a valve seat disposed internally of the body and forming part of the passageway; a valve element that is selectively reciprocated relative to the valve seat to close and open the passageway to fluid flow by seating and unseating the valve element on and from the valve seat, respectively; and an orifice disc disposed in the passageway downstream of the valve seat in a direction of the fluid flow through the fluid injector, the orifice disc including a plurality of dimples and a plurality of orifices defined through the orifice disc, each dimple including at least one orifice located thereon and each dimple having an asymmetrical cross-section. 1. A fluid injector for injecting fluid , comprising:a body;a fluid passageway defined in the body and extending from an inlet to an outlet of the fluid injector;a valve seat disposed internally of the body and forming part of the fluid passageway;a valve element that is selectively reciprocated relative to the valve seat to close and open the passageway to fluid flow by seating and unseating the valve element on and from the valve seat, respectively; andan orifice disc disposed in the fluid passageway downstream of the valve seat in a direction of the fluid flow through the fluid injector, the orifice disc including a plurality of dimples and a plurality of orifices defined through the orifice disc, each orifice is disposed along a dimple and each dimple has an asymmetrical cross-section.2. The fluid injector of claim 1 , wherein each dimple includes a single orifice located thereon.3. The fluid injector of claim 1 , wherein each dimple has maximum depth which is axially offset from a radial center of the dimple.4. The fluid injector of claim 3 , wherein for each dimple claim 3 , a radial distance between a center longitudinal axis of the disc and a first ...

Fuel injector and method for forming spray-discharge openings

A fuel injector for fuel injection systems of internal combustion engines has an excitable actuator for activating a valve closing element, which forms a sealing seat together with a valve face implemented on a valve seat element. Multiple spray-discharge openings are implemented in the valve seat element downstream from the valve face. The fuel injector is distinguished in that the spray-discharge openings include at least one upstream first spray-discharge opening section and one downstream second spray-discharge opening section having a different opening width and a wall area of the second spray-discharge opening section of all spray-discharge openings on a semi-circle runs either parallel or at a right angle to the longitudinal axis of the valve seat element having the spray-discharge openings. The valve seat element is manufactured using metal injection molding methods.

Improved fuel system for diesel type engines using carbonaceous aqueous slurry fuels

The present invention provides an improved fuel injection system and related method for controlling fuel heating and circulation in diesel type engines configured to use carbonaceous aqueous slurry fuels. The fuel injection system comprises: at least one fuel injector including an injector nozzle through which fuel is atomised and a fuel injector pump for pressurising fuel for supply to the injector nozzle; and a controlled bleed valve fluidly connected to each fuel injector and positioned to allow a controlled amount of carbonaceous aqueous slurry fuel to flow from the fuel injector.

Fuel injection device

Movement of a valve body in an unspecified direction due to a minute clearance existing between a valve body and a guide changes the flow of fuel flowing into injection holes every injection, thereby leading to variation in respective beams of spray from the injection holes and the flow rate of injection between the injection holes. Provided are a valve body that sits on or separates from a seat; a plurality of guides that slidably guide the valve body; and a plurality of flow channel portions each formed between each guide adjacent circumferentially. Then, among the plurality of flow channel portions, the cross-sectional area of the first flow channel portion on a horizontal plane orthogonal to the central axis of the valve body is smaller than each of the cross-sectional areas of the remaining flow channel portions on the horizontal plane.

MULTI-HOLE FUEL INJECTOR WITH TWISTED NOZZLE HOLES

Methods and systems are provided for a multi-hole nozzle of a fuel injector. In one example, a nozzle for a fuel injector may include multiple nozzle holes arranged at a nozzle tip, where each nozzle hole has a straight flow axis and a cross-section that twists around the straight flow axis, from an inlet to an outlet of the nozzle hole. Additionally, a long side of the cross-section may increase in length, along the nozzle hole, from the inlet to the outlet. 1. A nozzle of a fuel injector , comprising:a plurality of nozzle holes, each nozzle hole having a straight flow axis, along a length of each nozzle hole, and a cross-section that twists around the straight flow axis, from an inlet to outlet of each nozzle hole, where the straight flow axis runs through a center of the cross-section.2. The nozzle of claim 1 , wherein the straight flow axis is arranged at an angle relative to a central axis of the fuel injector claim 1 , wherein the plurality of nozzle holes are spaced apart from one another and arranged around the central axis claim 1 , and wherein the straight flow axis is arranged normal to the cross-section.3. The nozzle of claim 1 , wherein the cross-section is rectangular claim 1 , the rectangular cross section having a long side and a short side and wherein the long side is at least two times longer than the short side at the outlet of each nozzle hole.4. The nozzle of claim 1 , wherein a cross-sectional area of the cross-section of each nozzle hole is larger at the outlet than the inlet.5. The nozzle of claim 4 , wherein the cross-section of each nozzle hole has a step increase in cross-sectional area at a location within the nozzle hole claim 4 , between the inlet and outlet.6. The nozzle of claim 1 , wherein claim 1 , for each nozzle hole claim 1 , the cross-section at the outlet is twisted by at least 60 degrees from the cross-section at the inlet.7. The nozzle of claim 1 , wherein the cross-section has a shape of one of an elongated diamond claim 1 , ...

MANUFACTURING METHOD FOR FUEL INJECTION DEVICE NOZZLE PLATE, DIE FOR FUEL INJECTION DEVICE NOZZLE PLATE, AND FUEL INJECTION DEVICE NOZZLE PLATE

A gate is disposed so as to be opened to a cavity portion for forming a plate body part for forming a fuel injection device nozzle plate, and the cavity portion forms a portion surrounded by a plurality of nozzle holes. There are no differences in the times required for the molten resin injected from the gate into the cavity to reach portions for forming the plurality of nozzle holes. As a result, a molding failure of the nozzle holes and the vicinity thereof caused by differences in the charge speeds of molten resin can be prevented and the shapes of the nozzle holes and the vicinity thereof can be formed accurately. 1. A manufacturing method for a fuel injection device nozzle plate including a plate body part disposed facing a fuel injection port of a fuel injection device ,one thin plate portion or a plurality of thin plate portions of the plate body part provided with a plurality of nozzle holes through which fuel injected from the fuel injection port passes, anda thick-walled portion formed at a position in the plate body part at which the thin plate portions are surrounded,wherein, of a cavity for forming the plate body part, a cavity portion for forming a portion surrounded by the plurality of nozzle holes is provided with a gate for injecting molten resin into the cavity andthe molten resin injected from the gate into the cavity flows radially toward portions for forming the nozzle holes.2. A manufacturing method for a fuel injection device nozzle plate including a plate body part disposed facing a fuel injection port of a fuel injection device ,one thin plate portion or a plurality of thin plate portions of the plate body part provided with a plurality of nozzle holes through which fuel injected from the fuel injection port passes, anda thick-walled portion formed at a position in the plate body part at which the thin plate portions are surrounded,a cylindrical fitting part formed integrally with an outer periphery of the plate body part, the cylindrical ...

HIGH PRESSURE GASOLINE INJECTOR SEAT TO REDUCE PARTICLE EMISSIONS

A fuel injector has a seat and at least one seat passage. The seat includes an outer tip surface through which the seat passage extends. Fin structure is provided in the outer tip surface and is constructed and arranged to increase a surface area of the outer tip surface as compared to a surface area of the outer tip surface absent the fin structure. The outer tip surface, including the fin structure, is constructed and arranged to be heated by combustion gases so that the outer tip surface reaches a temperature greater than a temperature that the outer tip surface would reach absent the fin structure, so as to cause evaporation of fuel that contacts the outer tip surface. 1. A fuel injector having an inlet , an outlet , and a passageway providing a fuel flow conduit from the inlet to the outlet , the fuel injector comprising:a valve structure movable in the passageway between a first position and a second position;a seat, at the outlet, having at least one seat passage in communication with the passageway, the seat contiguously engaging a portion of the valve structure in the first position thereby closing the at least one seat passage and preventing fuel from exiting the at least one seat passage, the valve structure in the second position being spaced from the at least one seat passage so that fuel can move through the passageway and exit through the at least one seat passage, the seat including an outer tip surface through which the least one seat passage extends, andfin structure provided in the outer tip surface and constructed and arranged to increase a surface area of the outer tip surface as compared to a surface area of the outer tip surface absent the fin structure,wherein the outer tip surface, including the fin structure, is constructed and arranged to be heated by combustion gases so that the outer tip surface reaches a temperature greater than a temperature that the outer tip surface would reach absent the fin structure, so as to cause evaporation of ...

FUEL INJECTOR AND METHOD FOR MANUFACTURING FUEL INJECTOR

A fuel injector includes a nozzle member having a fuel passage leading to an injection port a valve main body adapted to reciprocate for opening and closing the fuel passage an elastic portion elastically deformable in closing the fuel passage by movement of the valve main body in a closing direction, the elastic member being attached to one of the nozzle member and the valve main body and adapted to be abutted against the other of the nozzle member and the valve main body to close the fuel passage by moving the valve main body in the closing direction; and a stopper adapted to restrict movement of the valve main body in the closing direction by being abutted against the valve main body the stopper being formed of material different from the nozzle member 1. A fuel injector comprising:an upstream-movable-seat portion provided to a metal movable portion which reciprocates;a downstream-movable-seat portion provided to the movable portion, the downstream-movable-seat portion disposed downstream of the upstream-movable-seat portion with respect to a fuel flow;an upstream-body-seat portion provided to a metal body; anda downstream-body-seat portion provided to the metal body, the downstream-body-seat portion disposed downstream of the upstream side body seat portion with respect to the fuel flow, whereinone of the upstream-movable-seat portion and the upstream-body-seat portion, or one of the downstream-movable-seat portion and the downstream-body-seat portion is formed of an elastic material with more excellent elasticity than a metal,a fuel passage is opened and closed by a connection and a disconnection between the upstream-movable-seat portion and the upstream-body-seat portion, and the fuel passage is opened and closed by a connection and a disconnection between the downstream-movable-seat portion and the downstream-body-seat portion, the fuel injector injecting a fuel into an internal combustion engine in opening the fuel passage,the movable portion is urged by a ...

Fluidic Component

A fluidic component having a flow chamber allowing a fluid flow to flow through, said fluid flow entering the flow chamber through an inlet opening of the flow chamber and emerging from the flow chamber through an outlet opening of the flow chamber, and which flow chamber has at least one means for changing the direction of the fluid flow at the outlet opening in a controlled manner. The flow chamber has a main flow channel, which interconnects the inlet opening and the outlet opening, and at least one auxiliary flow channel as a means for changing the direction of the fluid flow at the outlet opening in a controlled manner. The inlet opening has a larger cross-sectional area than the outlet opening or the inlet opening and the outlet opening have cross-sectional areas that are equal in size. 1. A mixing system for mixing two or more different fluids , the mixing system comprising a fluidic component having a flow chamber allowing a fluid flow to flow through , said fluid flow entering the flow chamber through an inlet opening of the flow chamber and emerging from the flow chamber through an outlet opening of the flow chamber , and which flow chamber has at least one means for changing the direction of the fluid flow at the outlet opening in a controlled manner to generate a spatial oscillation of the fluid flow at the outlet opening , wherein the flow chamber has a main flow channel , which interconnects the inlet opening and the outlet opening , and at least one auxiliary flow channel as a means for changing the direction of the fluid flow at the outlet opening in a controlled manner , wherein the inlet opening has a larger cross-sectional area than the outlet opening or the inlet opening and the outlet opening have cross-sectional areas that are equal in size , wherein the cross-sectional areas of the inlet opening and of the outlet opening are the smallest cross-sectional areas of the fluidic component through which the fluid flow passes when it enters the flow ...

FUEL INJECTOR HAVING NOZZLE SPRAY HOLES WITH GROOVES

An injector includes a nozzle body extending along a longitudinal axis and at least one spray hole extending through a portion of the nozzle body to output a fluid from the injector. The spray hole includes at least one groove. The groove is configured to facilitate efficient mixing of the fluid with air or other surrounding materials for enhanced performance of the injector and/or other components associated with the injector. 1. A method of forming a portion of a nozzle for an injector , comprising:providing a heating device;forming at least one spray hole within the nozzle; andforming, with the heating device, a groove in a helical configuration along an inner surface of at least a portion of the at least one spray hole.2. The method of claim 1 , wherein the heating device is a laser.3. The method of claim 1 , wherein a cross-sectional profile of each of the groove is generally rounded.4. The method of claim 1 , wherein the groove defines at least four grooves and each groove has a helical configuration along the inner surface.5. An injector claim 1 , comprising:a nozzle body; andat least one spray hole extending through a portion of the nozzle body and configured to output a fluid from the nozzle body, and the at least one spray hole includes at least four helical grooves.6. The injector of claim 5 , wherein the at least four helical grooves are evenly spaced about the at least one spray hole.7. The injector of claim 5 , wherein the at least four helical grooves include up to 24 helical grooves.8. The helical grooves of claim 7 , wherein the at least four helical grooves include 6-24 helical grooves.9. The injector of claim 5 , wherein each of the at least four helical grooves is defined by a cross-sectional height claim 5 , and the cross-sectional height is approximately 10-150 microns.10. The injector of claim 5 , wherein a cross-sectional profile of each of the at least four helical grooves is generally rounded.11. An injector claim 5 , comprising:a nozzle ...

FUEL INJECTION DEVICE

An object of the present invention is to provide a fuel injection device in which fuel sprays hardly adhere to an intake valve, a wall surface in an engine cylinder, or a piston. 1. A fuel injection device including a valve body and a seat surface to perform injection and sealing of fuel cooperatively and a plurality of injection holes of which inlet opening surfaces are formed on the seat surface , whereina first injection hole and a second injection hole arranged closest to the first injection hole, which configure the plurality of injection holes, are configured such thatthe first injection hole is larger than the second injection hole in an injection hole angle to be an angle formed by a normal direction of the seat surface and a center axis of the injection hole andthe second injection hole is larger than the first injection hole in an area of a cross-section perpendicular to the center axis of the injection hole.2. The fuel injection device according to claim 1 , wherein the second injection hole has two injection holes arranged at positions sandwiching the first injection hole in a circumferential direction around a center of the seat surface.3. The fuel injection device according to claim 2 , whereinthe plurality of injection holes include at least one injection hole in addition to the first injection hole and the second injection hole andamong all injection holes included in the plurality of injection holes, the injection hole angle in the first injection hole is largest and the area of the cross-section perpendicular to the center axis of the injection hole in the first injection hole is smallest.4. The fuel injection device according to claim 2 , whereinthe plurality of injection holes include, in addition to the first injection hole and the second injection hole, a third injection hole and two fourth injection holes arranged to sandwich the third injection hole in the circumferential direction around the center of the seat surface andthe area of the ...

FLOW CONTROL DEVICE

Provided is a fuel injection device that can secure strength capable of withstanding high fuel pressure. In a fuel injection device in which a fuel boundary includes two or more components, two components are press-fitted with an inner diameter and an outer diameter and are brought into contact at a butting surface, abutting welding is performed from a direction nearly parallel to the butting surface, an inner diameter side corner portion of the butting surface of a component to be fitted and press-fitted on an inner diameter side is chamfered longer in a direction perpendicular to the butting surface to increase a welding coupling length than a butting length, welding coupling length is less than welding depth, weld penetration depth is not less than material thickness, and the center of the weld is on a base material side, the outer diameter of which is larger than a joining face. 1. A flow control device including a first component and a second component having an opposing surface facing one surface of the first component , comprising:a butting surface that makes mutual contact between the one surface of the first component and the opposing surface of the second component; anda weld portion formed along the butting surface on the butting surface of the first component and the second component, whereinan air gap is formed by the weld portion, the first component, and the second component, anda welding direction tip end portion of the weld portion is positioned on a welding direction side with respect to the welding direction tip end portion of the butting surface.2. The flow control device according to claim 1 , whereinthe welding direction tip end portion of the weld portion is positioned on a welding direction side with respect to a welding direction tip end portion of the air gap.3. The flow control device according to claim 1 , whereina central portion in a direction orthogonal to a welding direction of the weld portion is positioned on a butting direction ...

CONTROL METHOD AND CONTROL DEVICE OF DIRECT INJECTION INTERNAL COMBUSTION ENGINE

An object of a control method to control a direct injection internal combustion engine that directly injects fuel in a cylinder is to reduce an increase in PN caused by attachment of the fuel to a fuel injection valve distal end. The control method cools the fuel before a fuel temperature when the fuel passes through an injection hole on a fuel injection valve reaches a temperature at which an amount of attached fuel to the fuel injection valve distal end increases. 1. A control method of direct injection internal combustion engine that directly injects fuel in a cylinder , wherein:the direct injection internal combustion engine includes an engine cooling passage including a cylinder head cooling passage and a cylinder block cooling passage independent of one another, andthe control method comprises:performing a fuel temperature control mode that increases a coolant flow rate of the cylinder head cooling passage before a fuel temperature when the fuel passes through an injection hole on a fuel injection valve reaches a temperature at which flash boiling occurs to cool the fuel, the fuel injection valve having a property of the fuel attaching to a peripheral area of the injection hole when the injected fuel causes the flash boiling and an angle of spray of fuel spray increases; andperforming a transition from a radiator flow passage control mode to the fuel temperature control mode when the fuel temperature rises during an execution of the radiator flow passage control mode, the radiator flow passage control mode including a first mode and a second mode, the first mode being configured to control a cylinder block and a cylinder head to have an identical temperature, the second mode being configured to control the cylinder head to have a temperature lower than a temperature of the cylinder block.2. A control device of direct injection internal combustion engine that directly injects fuel in a cylinder , wherein: an engine cooling passage including a cylinder head ...

Two-Stroke Internal Combustion Engine

A two-stroke internal combustion engine having at least one cylinder provided with a combustion chamber and an outlet and having a crank housing provided with a crank shaft. The housing is flow-connected to the combustion chamber via at least one transfer port, and the internal combustion engine is formed to inject fuel into the transfer port, against the transfer port from the crank housing into the combustion chamber; the internal combustion engine has at least one cylinder having two injectors, and fuel can be introduced by means of only one injector with a first engine load and by means of the two injectors with a second engine load.

PREMIXED COMPRESSION IGNITION ENGINE SYSTEM

A premixed compression ignition engine system includes an engine, a fuel injector, a water injector, and a controller. The controller conducts: a compression-stroke mid-period injection that causes a fuel injector to inject fuel to form a fuel-air mixture in a surrounding space of a combustion chamber; a compression top-dead-center injection that causes the fuel injector to inject fuel to form a fuel-air mixture in the central space of the combustion chamber after the compression-stroke mid-period injection; and a water injection that causes a water injector to inject water to the surrounding space of the combustion chamber at a timing from commencement of the compression-stroke mid-period injection to commencement of the compression top-dead-center injection. 1. A premixed compression ignition engine system , comprising:an engine having a cylinder;a piston reciprocatably disposed in the cylinder;a fuel injector configured to inject fuel and a water injector configured to inject water, into a combustion chamber defined by a crown top surface of the piston, the cylinder, and a lower surface of a cylinder head; anda controller configured to control fuel injection operation of the fuel injector and water injection operation of the water injector;the premixed compression ignition engine system having a downward concave cavity formed in a central portion of the crown top surface of the piston,the premixed compression ignition engine system forming a fuel-air mixture including air and fuel injected into the combustion chamber by the fuel injector, and igniting the fuel-air mixture by a compression operation of the piston, in the combustion chamber, at least in a central space corresponding to an inside of the cavity, of the central space and a surrounding space corresponding to an outer periphery of the cavity, whereinthe controller conducts: a first fuel injection that causes the fuel injector to inject fuel to form a fuel-air mixture in the surrounding space of the ...

FUEL INJECTOR WITH DUCT ASSEMBLY

Methods and systems are provided for a fuel injector of an internal combustion engine. In one example, a fuel injector includes a body having a flange shaped to seat within a shoulder of a passage of a cylinder head. The shoulder is positioned at an inner side of the cylinder head such that the fuel injector is coupled to the cylinder head at the inner side by the flange. 1. A system , comprising:a cylinder head including a passage extending from an outer surface to an inner surface of the cylinder head, a shoulder formed within the passage proximate to the inner surface, the shoulder forming a larger passage opening at the inner surface than the outer surface, the inner surface forming a top of a combustion chamber; anda fuel injector including a nozzle and a plurality of ducts arranged at a distal end of the fuel injector, where the distal end includes a flange that is wider than a body of the fuel injector extending toward a proximal end of the fuel injector, the flange adapted to seat within the shoulder.2. The system of claim 1 , wherein each duct of the plurality of ducts includes a first end and a second end claim 1 , the first end positioned closer to the flange than the second end claim 1 , and wherein a length between each second end of opposing ducts of the plurality of ducts is equal to or greater than a diameter of the passage.3. The system of claim 1 , wherein a length of each duct of the plurality of ducts is greater than half a diameter of the passage.4. The system of claim 1 , further comprising a plurality of protrusions extending from the inner surface of the cylinder head claim 1 , the plurality of protrusions shaped to engage with a plurality of counterpart grooves of an engine block.5. The system of claim 4 , wherein each protrusion of the plurality of protrusions includes a terminal end offset from the inner surface claim 4 , with a clearance formed between the inner surface and each terminal end claim 4 , and wherein the plurality of ducts ...

FRACTAL FLUID PASSAGES APPARATUS

Aspects of the present disclosure include branching fluid passages in an apparatus that reduce turbulent flow and generate evenly distributed fluid pressure as the fluids branch off into the different passages. In some embodiments, the branching passages may be subdivided into two sets: the branching passages for the liquid fuel and the branching passages for the liquid oxidizer. In some embodiments, the two sets of passages are carefully designed in an elegant yet extremely intricate manner that is optimized for proper fluid flow and maximal burn efficiency. The ends of all of the passages meet at the injector interface, which dispense the liquids into the combustion chamber for ignition. Generally, these designs are achieved through additive manufacturing, and would be extremely difficult, if not impossible, to be manufactured using traditional techniques. 1. An apparatus comprising: an inlet;', 'a first fractal fluid branching passage and a second fractal fluid branching passage, the first and second fractal fluid branching passages coupled to the inlet with continuously smooth curvature to the inlet such that fluid flowing from the inlet is configured to flow into both the first and second fractal fluid branching passages with minimal change in pressure drop;', 'a third fractal fluid branching passage and a fourth fractal fluid branching passage, the third and fourth fractal fluid branching passages coupled to the first fractal fluid branching passage with continuously smooth curvature to the first fractal fluid branching passage such that the fluid flowing from the first fractal fluid branching passage is configured to flow into both the third and fourth fractal fluid branching passages with minimal change in pressure drop; and', 'a fifth fractal fluid branching passage and a sixth fractal fluid branching passage, the fifth and sixth fractal fluid branching passages coupled to the second fractal fluid branching passage with continuously smooth curvature to the ...

Valve Assembly For An Injection Valve And Injection Valve

A valve assembly for an injection valve includes a valve body having a cavity with a fluid inlet portion and a fluid outlet portion; a hollow valve needle axially movable in the cavity between open and closed positions to control fluid flow through the fluid outlet portion, wherein fluid can flow from the fluid inlet portion into the hollow valve needle; and an actuator assembly that actuates the valve needle and includes an axially movable armature. The valve needle includes first orifice(s) between the armature and the fluid outlet portion and second orifice(s) located adjacent or upstream of the armature. The first and second orifices allow fluid flow between the hollow valve needle and the cavity. A first gap defined between the valve needle and the armature allows fluid flow from the hollow valve needle via the second orifice into the first gap and further into the cavity.

FUEL COOLED INJECTOR TIP

A fuel injector is provided comprising an outer housing, a nozzle housing disposed within the outer housing, a flow path between the outer housing and the nozzle housing, the flow path being coupled to a low pressure fuel source, and a circumferential gap in flow communication with the flow path and extending about a tip of the fuel injector between an outer surface of the nozzle housing and an inner surface of a combustion shield adjacent the injector tip. The circumferential gap is in flow communication with a drain gap between the outer housing and a bore for receiving the fuel injector, the drain gap routing the low pressure fuel away from the injector tip. 1. A fuel injector , comprising:an outer housing;a nozzle housing disposed within the outer housing;a flow path between the outer housing and the nozzle housing, the flow path being coupled to a low pressure fuel source; anda circumferential gap in flow communication with the flow path and extending about a tip of the fuel injector between an outer surface of the nozzle housing and an inner surface of a combustion shield adjacent the injector tip;wherein the circumferential gap is in flow communication with a drain gap between the outer housing and a bore for receiving the fuel injector, the drain gap routing the low pressure fuel away from the injector tip.2. The fuel injector of claim 1 , wherein the outer surface of the nozzle housing includes a first shoulder that contacts the combustion shield to define one end of the circumferential gap claim 1 , and a second shoulder that contacts the combustion shield to define another end of the circumferential gap claim 1 , the other end of the circumferential gap having an opening in flow communication with the flow path.3. The fuel injector of claim 2 , wherein the drain gap is in flow communication with the circumferential gap at a location between the ends of the circumferential gap.4. The fuel injector of claim 1 , wherein the nozzle housing comprises at least ...

FUEL INJECTION VALVE

A fuel injection valve includes a valve seat and a valve body that cooperate with each other to open and close a fuel passage, a movable element that has the valve body provided at one end thereof and has a fuel passage formed therein, a valve seat member having the valve seat formed thereon, an upstream-side communication hole that is located upstream of the flow of fuel and connects the inside and outside of the movable element , and a downstream-side communication hole that is located downstream of the flow of fuel and connects the inside and outside of the movable element, in which a guide section for the valve body , where the valve seat member and the valve body are in sliding contact with each other, is provided downstream of the downstream-side communication hole and in which a fuel passage for connecting in the center axis direction the upstream side and downstream side of the guide section is provided at the same angular position in the circumferential direction of the movable element as the downstream-side communication hole . With this arrangement, even if a foreign thing is accidently mixed into the fuel passage during the production process, the foreign thing can be removed with a shorter running-in operation time. 111.-. (canceled)12. A fuel injection valve including a valve seat and a valve body that cooperate with each other to open and close a fuel passage , a movable element that has the valve body provided at one end thereof and has a fuel passage formed therein , a valve seat member having the valve seat formed thereon , an upstream-side communication hole that is located upstream of the flow of fuel and connects the inside and outside of the movable element , and a downstream-side communication hole that is located downstream of the flow of fuel and connects the inside and outside of the movable element , in which a guide section for the valve body , where the valve seat element and the valve body are in sliding contact with each other , is ...

FUEL INJECTOR

In a fuel injector , a first injection hole and a second injection hole having reference inside diameters Dn, Dn different from each other are formed as a plurality of injection holes . In such a configuration, an L/D value obtained by dividing the flow channel length Ln of the first injection hole by the reference inside diameter Dn of the first injection hole agrees to an L/D value obtained by dividing the flow channel length Ln of the second injection hole by the reference inside diameter Dn of the second injection hole 1. A fuel injector that injects fuel from a plurality of injection holes toward an inside of a combustion chamber arranged in an internal combustion engine , whereinthe plurality of injection holes include a first injection hole and a second injection hole each of which has a reference inside diameter,each of the first injection hole and the second injection hole has a tapered hole shape that expands the diameter from the reference inside diameter starting from the fuel upstream side toward the fuel downstream side, a first expanded diameter hole which penetrates the injection hole wall while continuing to the first injection hole, the first expanded diameter hole having a diameter larger than that of the first injection hole; and', 'a second expanded diameter hole which penetrates the injection hole wall while continuing to the second injection hole, the second expanded diameter hole having a diameter larger than that of the second injection hole,, 'the plurality of injection holes are provided to an injection hole wall, which is formed withthe first expanded diameter hole is formed on the fuel downstream side of the first injection hole, andthe second expanded diameter hole is formed on the fuel downstream side of the second injection hole.2. The fuel injector according to claim 1 , whereina flow channel length of the first injection hole greater than a length of the first expanded diameter hole which is along an injection hole axis of the ...

NOZZLE FOR A FUEL INJECTOR

A nozzle for a fuel injector the nozzle having a pivotably symmetrical nozzle member with a hollow space for introducing a nozzle needle, a nozzle tip at a longitudinal end of the nozzle member, at least one opening channel extending in a straight line for the discharge of fuel, and a nozzle needle arranged in the hollow space for selectively blocking an fuel inflow to the at least one opening channel. The nozzle is characterized in that the at least one opening channel has a center axis that is skewed with respect to the longitudinal axis of the nozzle member.

Fuel injection valve

A fuel injection valve is attached to an engine and to have an annular seal material attached thereon. The seal material is attached to a first reduced diameter part. In a use state where a body is inserted in an attachment hole formed at a predetermined position of the engine and a gas pressure that is equal to or higher than a predetermined pressure is applied to the seal material from its nozzle hole-side, the seal material is pressed against a first tapered part by the gas pressure to be compressively deformed, and a clearance between an inner peripheral surface of the attachment hole and an outer peripheral surface of the body is sealed with a compressively-deformed part of the seal material. A taper angle of the first tapered part is set in a range from 10 degrees to 20 degrees.

FUEL INJECTOR

A fuel injector for a compression ignited engine comprises an injector nozzle with a nozzle body having at least one spray hole with a hole entry from a sack on the inside of the nozzle body and a hole exit on the outside of the nozzle body. The hole entry of the spray hole has a cross-section being elliptical and larger than the cross-section of the hole exit of the spray hole. The cross-sections of the hole entry and the hole exit of the spray hole are concentric as seen in the direction of a centre axis of the spray hole intersecting said cross-section. 1. A fuel injector for a compression ignited engine comprising an injector nozzle with a nozzle body having at least one spray hole with a hole entry from a sack on the inside of the nozzle body and a hole exit on the outside of the nozzle body , said hole entry of the spray hole having a cross-section being elliptical and larger than the cross-section of said hole exit of the spray hole , wherein the cross-sections of the hole entry and the hole exit of the spray hole are concentric as seen in the direction of a center axis of the spray hole intersecting said cross-sections.2. A fuel injector according to further comprising claim 1 , a plurality of said spray holes distributed around the periphery of said sack claim 1 , and that said spray holes are arranged with the cross-section of the hole entry thereof having the minor-axis of the ellipse directed along the circumference of the sack towards adjacent spray holes.3. A fuel injector according to claim 1 , wherein the minor-axis of the cross-section ellipse of the entry hole of said at least one spray hole is in the range of 0.05-0.5 mm or the range of 0.1-0.3 mm.4. A fuel injector according to claim 1 , wherein the cross-section of said at least one spray hole decreases continuously from the hole entry to the hole exit.6. A fuel injector according to claim 1 , wherein said hole exit has a circular cross-section.7. A fuel injector according to claim 6 , wherein ...

Fuel Injection Valve

An object of the present invention is to provide a fuel injection valve that can be used in a gasoline engine and can take fuel into an injection hole with a small pressure loss near a seat portion on which a valve is seated. Thus, the present invention provides a fuel injection valve for a gasoline engine which includes: a plurality of injection holes; and a seat portion that opens and closes a fuel passage to the plurality of injection holes in cooperation with a valve. At least one fuel injection hole among the plurality of injection holes is configured in a shape such that an injection hole inlet has a long axis and a short axis, and the long axis is directed in a direction in which an extension line intersects with the seat portion. 1. A fuel injection valve for a gasoline engine , the fuel injection valve comprising:a plurality of injection holes; anda valve and a seat portion that opens and closes a fuel passage to the plurality of injection holes in cooperation with each other,whereinat least one fuel injection hole among the plurality of injection holes is configured in a shape such that an injection hole inlet has a long axis and a short axis, andthe long axis is directed in a direction in which an extension line intersects with the seat portion.2. The fuel injection valve according to claim 1 , whereinthe seat portion and the plurality of injection holes are configured in a nozzle member, andwhen the injection hole inlet is projected on a virtual plane perpendicular to a central axis of the fuel injection valve, an angle formed by the long axis and a radial direction of the nozzle member is 50° or smaller.3. The fuel injection valve according to claim 2 , whereinan injection hole inlet has a long axis and a short axis intersecting each other in all of the plurality of injection holes, andwhen a vertical line from an upstream side to a downstream side of the fuel injection valve is projected onto an upstream injection hole surface, the angle formed by the ...

FUEL INJECTION VALVE, INTERNAL COMBUSTION ENGINE AND FUEL INJECTION METHOD

It is an object of the present invention to reduce the penetration of a fuel spray directed toward a certain area in a cylinder, thereby reducing oil dilution that increases sliding resistance in the engine, reducing fuel adhesion or the like onto the cylinder liner, and also reducing the adverse effect of a fuel spray having an increased penetration. 1. A fuel injection valve that has a plurality of injection holes and injects fuel into a cylinder of an internal combustion engine , comprising:a first group of injection holes for injecting fuel toward a ring-shaped space including an area of strong tumble flow formed in the cylinder; and a second group of injection holes for injecting fuel toward a space including an area of weak tumble flow formed in the cylinder,wherein a fuel spray with a smallest penetration force from the first group of injection holes has a penetration force larger than a fuel spray with a largest penetration force from the second group of injection holes.2. The fuel injection valve according to claim 1 , wherein the first group of injection holes includes an injection hole having an injection center axis line having a minimum angle with a circular plane including a ring of the space.3. The fuel injection valve according to claim 1 , wherein the second group of injection holes includes an injection hole having an injection center axis line having a maximum angle with a circular plane including a ring of the space.4. The fuel injection valve according to claim 1 , wherein a smallest injection hole of the first group of injection holes has a diameter larger than that of a largest injection hole of the second group of injection holes.5. The fuel injection valve according to claim 1 , wherein a plurality of spaces are formed claim 1 , and the second group of injection holes inject fuel toward a space of weak tumble flow formed between and outside the plurality of spaces.6. The fuel injection valve according to claim 1 , wherein a plurality of ...

NOZZLE PLATE FOR FUEL INJECTION DEVICE

In a nozzle plate for a fuel injection device which can inject fuel flowed out from a fuel injection port of the fuel injection device in a sufficiently atomized state, a portion of fuel which flows in the inside of a nozzle hole impinges on an interference element, is sharply bent so as to flow backward by an impinging surface of the interference element which is formed of an annular recessed surface, is made to impinge on fuel which intends to advance straightly and pass through the nozzle hole and the orifice, and forms the flow of the fuel which intends to advance straightly and pass through the nozzle hole and the orifice into a turbulent flow. As a result, the nozzle plate for a fuel injection device further enhances the level of the atomization of fuel. 1. A nozzle plate for a fuel injection device which is mounted on a fuel injection port of a fuel injection device , and has at least one nozzle hole through which fuel injected from the fuel injection port passes , whereinthe at least one nozzle hole is a hole formed in a nozzle plate body, an orifice which throttles a flow of the fuel is formed by partially closing an outlet-side opening portion, which forms an opening portion on a fuel flow-out side, by an interference element,the nozzle plate body and the interference element are integrally formed by cooling and solidifying a molten material filled into the inside of a cavity, anda surface of the interference element, which a portion of fuel which flows in the inside of the at least one nozzle hole impinges on, is an annular recessed surface which faces toward an upstream side in the flow direction of the fuel flowing in the inside of the nozzle and imparts kinetic energy which returns the flow of the fuel toward the upstream side in the flow direction of the fuel, and the surface of the interference element forms the fuel which passes through the at least one nozzle hole into a turbulent flow; and sharply bends the flow of a portion of fuel which passes ...

Valve Needle For A Fluid Injection Valve

The present disclosure relates to fluid injection valves. Embodiments of the teachings thereof may include a valve needle for a fluid injection valve and a fluid injection valve. For example, a valve needle for a fluid injection valve may include: a needle shaft; and a sealing ball welded to a tip of the needle shaft. The welded joint between the sealing ball and the needle shaft comprises at least two separate weld seams extending along a perimeter of the valve needle in the form of c-shaped arcs. 1. A valve needle for a fluid injection valve , the valve needle comprising:a needle shaft; anda sealing ball welded to a tip of the needle shaft;wherein a welded joint between the sealing ball and the needle shaft comprises at least two separate weld seams extending along a perimeter of the valve needle in the form of c-shaped arcs.2. A valve needle according to claim 1 , wherein the at least two separate weld seams are mirror inverted.3. A valve needle according to claim 1 , wherein the welded joint has a 2-fold rotational symmetry.4. A valve needle according to claim 1 , wherein the at least two separate weld seams each comprise a semicircular C-shaped arc.5. A valve needle according to claim 1 , wherein a cross section of each of the at least two weld seams is uniform along its linear extent.6. A valve needle according to claim 1 , wherein a cross section of each of the at least two weld seams varies along a distance from a central portion of the respective c-shaped arc.7. A fluid injection valve comprising:a fluid flow inlet;a fluid flow outlet;a needle shaft; anda sealing ball welded to a tip of the needle shaft and configured to seal the fluid flow outlet when in a closed position;wherein a welded joint between the sealing ball and the needle shaft comprises at least two separate weld seams extending along a perimeter of the valve needle in the form of c-shaped arcs.8. A method for manufacturing a valve needle for a fluid injection valve claim 1 , the method ...

FUEL INJECTOR AND NOZZLE ASSEMBLY HAVING DUAL CONCENTRIC CHECK ASSEMBLY AND DUCTED SPRAY ORIFICES

A fuel injector includes a nozzle assembly having a nozzle case, and a concentric check assembly within the nozzle case. Transfer passages are formed in an outer check of the check assembly, and spray orifices are formed in the nozzle case. A fuel volume is formed between the outer check and an inner check, and the inner check is movable to fluidly connect the transfer passages to the fuel volume. The outer check is rotatable between a first angular orientation and a second angular orientation to fluidly connect separate sets of the transfer passages to separate sets of the spray orifices. Spray ducts are in spray path alignment with at least one of the sets of spray orifices. 1. A fuel injector comprising:a nozzle case defining a longitudinal axis, and having spray orifices formed therein arranged in a first orifice set and a second orifice set;spray ducts coupled to the nozzle case and in spray path alignment with the first orifice set;an outer check positioned within the nozzle case and having transfer passages formed therein arranged in a first passage set and a second passage set, and the outer check is rotatable about the longitudinal axis relative to the nozzle case;an inner check positioned within the outer check and movable relative to the outer check between a retracted position and an advanced position;a fuel volume formed between the outer check and the inner check, and at the retracted position the transfer passages are fluidly connected to the fuel volume, and at the advanced position the inner check is in contact with the outer check and blocks the transfer passages from the fuel volume;the spray orifices and the transfer passages together define a first angular alignment pattern where the outer check is at a first angular orientation about the longitudinal axis and the first orifice set is fluidly connected to the first passage set; andthe spray orifices and the transfer passages together define a second angular alignment pattern where the outer ...

FUEL INJECTION CONTROL DEVICE AND FUEL INJECTION SYSTEM

A fuel injection control device is adapted for a fuel injection system including an injector and a high-pressure pump that raises pressure of fuel and supplies the fuel to the injector. The fuel injection control device includes a selecting unit for selecting by which one of full lift injection and partial injection to inject fuel, and a pump control unit for controlling operation of the high-pressure pump such that a pressure of fuel supplied to the injector coincides with a target pressure. The selecting unit selects the partial injection when a required injection quantity of fuel is equal to or smaller than a partial maximum injection quantity. A fuel injection system includes the fuel injection control device, the injector, and the high-pressure pump. 1. A fuel injection control device adapted for a fuel injection system including:an injector that is provided for an internal-combustion engine and includes a valving element and a nozzle hole, the injector configured to open the valving element and to inject fuel through the nozzle hole; anda high-pressure pump configured to raise pressure of fuel and to supply the fuel to the injector, the fuel injection control device comprising:a selecting means for selecting by which one of full lift injection and partial injection to inject fuel, wherein:by the full lift injection, the valving element starts to be opened, and reaches its full lift position, and then starts to be closed; andby the partial injection, the valving element starts to be opened, but does not reach its full lift position, and then starts to be closed; anda pump control means for controlling operation of the high-pressure pump such that a pressure of fuel supplied to the injector coincides with a target pressure, wherein:a maximum injection quantity of fuel when the partial injection is performed at a maximum value of the target pressure that the fuel injection system is capable of taking is referred to as a partial maximum injection quantity of fuel; ...

METHODS AND SYSTEMS FOR A FUEL INJECTOR ASSEMBLY

Methods and systems are provided for injecting fuel through three different rows of injector nozzles, where each row of the injector nozzle is arranged along a different vertical plane of the injector body. In one example, an injector needle housed movably inside the injector body may supply high-pressure fuel to each of the rows of injector nozzles sequentially to deliver up to five fuel injections in one actuation cycle of the fuel injector. In another example, a fuel injector may include three injector needles, where movement of each injector needle inside a respective chamber of the fuel injector body may supply high-pressure fuel to the chamber from where the fuel may be injected through the coupled fuel injector nozzles. 21. The method of claim , wherein displacing the plurality of fuel injector needles comprises displacing a first injector needle of the plurality of fuel injector needles for a first distance from a closed position to a first open position , wherein at the first open position , the fuel injector injects fuel through the first nozzle fluidically coupled to the first chamber , the first chamber receiving fuel through a first passage of the first injector needle fluidically coupled to a first fuel branch.3. The method of claim 2 , wherein displacing the first injector needle further comprises displacing the first injector needle along with a second injector needle of the plurality of fuel injector needles for a second distance from the first open position to the second open position claim 2 , wherein at the second open position claim 2 , the fuel injector injects fuel through the second nozzle and through the first nozzle.4. The method of claim 3 , wherein at the second open position claim 3 , the second chamber receives fuel through a second passage of the second injector needle claim 3 , the second passage coupled to a second fuel branch claim 3 , and at the second open position claim 3 , the first injector needle is fluidically decoupled from ...

DEVICE FOR CONTROLLING DIRECT-INJECTION GASOLINE ENGINE

An engine () includes an engine body, an injector (), and an engine controller (). The engine body includes a piston () inside a cylinder (), and a combustion chamber () defined by the cylinder () and the piston (). The injector () injects fuel containing at least gasoline into the combustion chamber () via a nozzle port (). The engine controller () allows the injector () to inject the fuel in at least a second half of a compression stroke, and controls an injection condition of the injector (). The injector () has a parameter for adjusting spread of fuel spray. The engine controller () adjusts the parameter to increase the spread of fuel spray with an increase in pressure in the combustion chamber (). 1. A device for controlling a direct-injection gasoline engine , the device comprising:an engine body including a piston inside a cylinder, and a combustion chamber defined by the cylinder and the piston;an injector injecting fuel containing at least gasoline into the combustion chamber via an injection port; anda controller allowing the injector to inject the fuel in at least a second half of a compression stroke, and controlling an injection condition of the injector; whereinthe injector has a parameter for adjusting spread of fuel spray,pressure in the combustion chamber is increased by controlling such that the higher an engine load is, the larger a filling amount of intake air is, and allows the injector to inject the fuel in the second half of the compression stroke to form, at ignition of an air-fuel mixture of the mixture layer formed in the combustion chamber, a gas layer of fresh air and/or burnt gas between the mixture layer and a wall surface which defines the combustion chamber,', 'predicts the pressure in the combustion chamber, and', 'adjusts the parameter so that the spread of fuel spray is greater when the predicted pressure is high than that when the predicted pressure is low, even if a same amount of fuel is injected., 'in low and intermediate ...

DISPENSER NOZZLE FOR HIGH PRESSURE INJECTION

The present invention relates to a dispenser nozzle for high pressure injection, of which injection pressure and efficiency are largely improved and the product lifespan is increased, and in which a tappet has a leading end portion formed in a conical shape, and a nozzle includes a funnel-shaped accommodation part formed for maintaining a predetermined gap G from an outer circumferential surface of the leading end portion of the tappet , a funnel groove formed in the center of a bottom surface of the funnel-shaped accommodation part such that the leading end portion of the tappet is inserted into the funnel groove by a predetermined length, and an injection hole penetratingly formed in the center of the funnel groove 110203010010110302030110110. A dispenser nozzle for high pressure injection , applied to a dispenser which includes a driving part , a coupling part and a nozzle part , such that a tappet , which carries out vibration motion and has a leading end portion formed in a conical shape , is mounted on the lower end of the driving part so as to be exposed and inserted into the nozzle part through the coupling part , and the nozzle part is provided with a nozzle on the bottom surface thereof , the nozzle comprising:{'b': 111', '101', '100, 'a funnel-shaped accommodation part formed for maintaining a predetermined gap G from an outer circumferential surface of the leading end portion of the tappet ;'}{'b': 112', '111', '111', '101', '100', '112, 'i': 'a', 'a funnel groove formed in the center of a bottom surface of the funnel-shaped accommodation part such that the leading end portion of the tappet is inserted into the funnel groove by a predetermined length; and'}{'b': 113', '112, 'an injection hole penetratingly formed in the center of the funnel groove .'}210203010010110302030120120. A dispenser nozzle for high pressure injection , applied to a dispenser which includes a driving part , a coupling part and a nozzle part , such that a tappet , which carries out ...

METHODS AND SYSTEMS FOR A FUEL INJECTOR

Methods and systems are provided for a fuel injector. In one example, a system may include an injection nozzle having a venturi shape with an upstream twisted fin arranged in a venturi inlet. The system may further include a downstream twisted fin arranged in a venturi outlet. 1. A system , comprising:an injector having a venturi-shaped nozzle, wherein the nozzle comprises a plurality of upstream twisted fins arranged in a venturi inlet of the nozzle, and where a leading edge of an upstream twisted fin of the plurality of upstream twisted fins is perpendicular to a trailing edge of the twisted fin.2. The system of claim 1 , wherein the nozzle further comprises a plurality of downstream twisted fins arranged in a venturi outlet of the nozzle claim 1 , and where the plurality of downstream twisted fins is identical to the plurality of upstream twisted fins in shape.3. The system of claim 2 , wherein a leading edge of a downstream twisted fin of the plurality of downstream twisted fins is oriented at an angle relative to the leading edge of the upstream twisted fin of the upstream twisted fins.4. The system of claim 3 , wherein the angle is equal to 45°.5. The system of claim 2 , wherein a width of each of the plurality of downstream twisted fins is equal to 40% of a diameter of the venturi outlet claim 2 , and where the diameter of the venturi outlet increases in a downstream direction.6. The system of claim 1 , wherein a venturi throat of the nozzle is arranged between the venturi inlet and a venturi outlet claim 1 , and where the upstream twisted fins do not extend into the venturi throat.7. The system of claim 1 , wherein a diameter of the venturi inlet decreases in a downstream direction claim 1 , and where a width of each of the plurality of upstream twisted fins decreases in the downstream direction claim 1 , and where the width is equal to 40% of the diameter of the venturi outlet.8. The system of claim 1 , where the plurality of upstream twisted fins is ...

FUEL INJECTOR HAVING VALVE SEAT ORIFICE PLATE WITH VALVE SEAT AND DRAIN AND RE-PRESSURIZATION ORIFICES

A fuel injector includes an injector housing, an outlet check, an injection control valve assembly, and a valve seat orifice plate integrating a valve seat and various orifices for outlet check control. In the valve seat orifice plate a drain orifice extends between a valve seat surface and a check control chamber formed between a closing hydraulic surface of the outlet check and the valve seat orifice plate. First and second re-pressurization orifices extend between an outer surface of the valve seat orifice plate and the check control chamber. 1. A fuel injector comprising:an injector housing defining a longitudinal axis and having formed therein a fuel inlet, a fuel drain outlet, a nozzle cavity fluidly connected to the fuel inlet, and a plurality of nozzle outlets;an outlet check movable from a closed position blocking the plurality of nozzle outlets from the nozzle cavity, to an open position, and having a closing hydraulic surface;a valve seat orifice plate including a first axial side having a valve seat surface, a second axial side, and an outer surface axially between the first axial side and the second axial side and exposed to a fluid pressure of the fuel inlet;the valve seat orifice plate further including a drain orifice extending between the valve seat surface and a check control chamber formed between the closing hydraulic surface and the second axial side, and a first re-pressurization orifice and a second re-pressurization orifice each extending between the outer surface and the check control chamber; andan injection control valve assembly including an electrical actuator, an armature, and an injection control valve movable from a closed position in contact with the valve seat surface, to an open position fluidly connecting the drain orifice to the fuel drain outlet.2. The fuel injector of wherein:the drain orifice is centrally located in the valve seat orifice plate and intersected by the longitudinal axis; andthe drain orifice includes an ...

FUEL INJECTION DEVICE OF ENGINE

A control device of an engine including a cylinder, a piston, a cylinder head, and a combustion chamber, is provided. The device includes intake and exhaust ports, a swirl control valve, a fuel injection valve attached to the cylinder head to be oriented into the combustion chamber and having first and second nozzle ports, and a control unit. The control unit includes a processor configured to execute a swirl opening controlling module to control the swirl control valve to have a given opening at which a swirl ratio inside the combustion chamber becomes 2 or above, and a fuel injection timing controlling module to control the fuel injection valve to inject fuel at a given timing at which the swirl ratio becomes 2 or above and a swirl flow from a lower portion to a higher portion of the combustion chamber in a side view occurs. 1. A control device of an engine including a cylinder , a piston for reciprocating inside the cylinder along a center axis thereof , a cylinder head , and a combustion chamber formed by the cylinder , the piston , and the cylinder head , comprising:an intake port configured to introduce intake air into the combustion chamber;an exhaust port configured to discharge exhaust gas from the combustion chamber;a swirl control valve provided in an intake passage connected to the intake port;a fuel injection valve attached to the cylinder head, disposed to be oriented into the center of the combustion chamber in a plan view thereof, and having a first nozzle port with a nozzle port axis extending to the exhaust port side in the plan view and a second nozzle port with a nozzle port axis extending to the intake port side in the plan view; anda control unit connected to the fuel injection valve and the swirl control valve and configured to output a control signal to the fuel injection valve and the swirl control valve, respectively, the control unit including a processor configured to execute a swirl opening controlling module to output the control signal ...

Control device for engine

A control device for an engine is provided, which includes a fuel injector attached to the engine, a spark plug disposed to be oriented into a combustion chamber, a swirl control valve provided in an intake passage, and a controller connected to the fuel injector, the spark plug, and the swirl control valve and configured to control the fuel injector, the spark plug, and the swirl control valve. The swirl control valve closes in a given operating state of the engine. The fuel injector injects fuel after the swirl control valve is closed, between intake stroke and an intermediate stage of compression stroke. The fuel injector injects the fuel after the first fuel injection. The spark plug performs the ignition after the second fuel injection so that the mixture gas starts combustion by flame propagation and then unburned mixture gas self-ignites.

FUEL INJECTOR ASSEMBLY HAVING DUCT STRUCTURE

A fuel injector assembly for an engine. The engine includes a cylinder head defining a through-hole. The fuel injector assembly includes an insert, having a first end and a second end, configured to be received within the through-hole and coupled to the cylinder head. The insert defines a bore extending from the first end to the second end. The fuel injector assembly further includes a fuel injector including a plurality of orifices, received within the bore of the insert; and a duct structure including a plurality of ducts, coupled to the insert such that the plurality of ducts align with the plurality of orifices to at least partially receive one or more fuel jets from the plurality of orifices of the fuel injector. 1. A fuel injector assembly for an engine , the engine including a cylinder head defining a through-hole , the fuel injector assembly comprising:an insert, having a first end and a second end, configured to be received within the through-hole and coupled to the cylinder head, the insert defining a bore extending from the first end to the second end;a fuel injector including a plurality of orifices, received within the bore of the insert; anda duct structure including a plurality of ducts, coupled to the insert such that the plurality of ducts align with the plurality of orifices to at least partially receive one or more fuel jets from the plurality of orifices of the fuel injector.2. The fuel injector assembly of wherein the duct structure is coupled to the first end of the insert such that each duct of the plurality of ducts is axially spaced from the insert.3. The fuel injector assembly of wherein the insert is coupled to the cylinder head by one of press-fitting the insert into the through-hole of the cylinder head and threadably coupling the insert with the cylinder head.4. The fuel injector assembly of wherein claim 1 ,the insert defines a protuberance; andthe fuel injector includes a grooved region configured to abut the protuberance to ...

Fuel Injection Valve

It is prevented that residual fuel left in the vicinity of an injection nozzle outlet is carbonized to cause adherence of the carbonized fuel as deposit and changing of a spray pattern or an injection flow rate. A fuel injection valve includes a seat portion on which a valve body is seated and a seat portion in which an injection hole for injecting fuel downstream from the seat portion is formed, in which a concave surface denting in a direction opposite to a fuel injecting direction is formed on an outer peripheral side away from the injection hole at an end face located downstream of the seat member, and the concave surface is formed such that a material surface in an outer peripheral region has a larger wettability for the fuel than in an inner peripheral region. 1. A fuel injection valve , comprising:a seat portion on which a valve body is seated; anda seat portion in which an injection hole for injecting fuel is formed downstream from the seat portion,wherein a concave surface denting in a direction opposite to a fuel injecting direction is formed on an outer peripheral side away from the injection hole at an end face located downstream from the seat member, andthe concave surface has wettability for fuel on a material surface in an outer peripheral region larger than wettability in an inner peripheral region.2. The fuel injection valve according to claim 1 , whereina dimple is formed on the material surface in the outer peripheral region of the concave surface.3. The fuel injection valve according to claim 1 , whereinan edge portion is formed on the material surface in the outer peripheral region of the concave surface.4. The fuel injection valve according to claim 3 , whereina dimple is formed on the material surface in the outer peripheral region away from the edge portion and in the outer peripheral region of the concave surface.5. The fuel injection valve according to claim 1 , whereinthe material surface in the outer peripheral region of the concave ...

FUEL INJECTION VALVE

Disclosed is a fuel injection valve comprising: a fuel injection orifice provided in a downstream side of a valve seat which a valve body moves toward and away from; a swirl chamber having a swirl passage formed around the entry opening of the fuel injection orifice; and a transverse passage whose end is opened in an inner circumferential wall of the swirl chamber in order to provide a fuel into the swirl chamber, wherein a center of the entry opening is shifted from a first position where the velocity component in the swirl direction of the fuel can be maximized to a second position where the velocity component in the swirl direction is reduced, and where a velocity component in a center axis direction of the fuel injection orifice is enhanced. Thereby, it is possible to easily adjust a fuel injection amount and a spray angle. 1. A fuel injection valve comprising:a valve body;a fuel injection orifice provided in a downstream side of a valve seat which the valve body moves toward and away from; 'a swirl passage for a fuel, the swirl passage formed between the inner circumferential wall and the entry opening; and', 'a swirl chamber having a bottom surface on which an entry opening of the fuel injection orifice opens and an inner circumferential wall surrounding the bottom surface, the swirl chamber having one width direction end part connected to an upstream side of the inner circumferential wall in a flow direction of a swirl fuel; and', 'the other width direction end part connected to a downstream side of the inner circumferential wall in the flow direction of the swirl fuel, and, 'a transverse passage whose downstream end is opened in the inner circumferential wall of the swirl chamber in order to provide the fuel into the swirl chamber, the transverse passage havingwhen imaging an extension line formed by extending the other width direction end part of the transverse passage to a swirl chamber side, and a straight line segment passing a center of the swirl ...

DIESEL ENGINE

In a diesel engine, a crown surface of a piston is formed with a cavity which is recessed toward an opposite side of a cylinder head, and which has a circular shape in planar view, and a wall surface forming the cavity includes a lip which is formed on a peripheral edge of the cavity, and which is protruded radially inward, and the lip is formed with a plurality of notches which are recessed radially outward from the peripheral edge of the cavity, and a fuel injector is arranged at a center of the cylinder head, and formed with a plurality of injection holes oriented toward an inside of the cavity so as to radially spray fuel within the cavity, and each of the plurality of the notches is arranged between oriented directions of two adjacent injection holes. 1. A diesel engine , comprising:a cylinder head covering one end of a cylinder;a piston having a crown surface opposed to the cylinder head, and performing a reciprocating movement within the cylinder; anda fuel injector attached to the cylinder head,wherein the crown surface of the piston is formed with a cavity which is recessed toward an opposite side of the cylinder head, and which has a circular shape in planar view,a wall surface forming the cavity includes a lip which is formed on a peripheral edge of the cavity, and which is protruded radially inward,the lip is formed with a plurality of notches which are recessed radially outward from the peripheral edge of the cavity,the fuel injector is arranged at a center of the cylinder head, and formed with a plurality of injection holes oriented toward an inside of the cavity so as to radially spray fuel within the cavity, in planar view, andeach of the plurality of the notches is arranged between oriented directions of two adjacent injection holes in the plurality of the injection holes.2. The diesel engine according to claim 1 , wherein each of the plurality of injection holes is oriented toward an opposite side of the cylinder head with respect to a tip end of ...

LIQUID FUEL INJECTOR HAVING DUAL NOZZLE OUTLET SETS, FUEL SYSTEM, AND METHOD

A liquid fuel injector for a fuel system in an internal combustion engine includes two injection control valves for controlling two outlet checks. A common nozzle supply cavity is fluidly connected to an inlet passage and supplies each of the two sets of nozzle outlets opened and closed by the outlet checks. A first nozzle outlet set forms a narrower spray angle and has a first combination of outlet number and outlet size, and a second nozzle outlet set forms a wider spray angle and has a second combination of outlet number and outlet size. The first nozzle outlet set has a greater steady flow than the second nozzle outlet set. 1. A liquid fuel injector for an internal combustion engine comprising:an injector body defining an inlet passage, a first set of nozzle outlets, a second set of nozzle outlets, a first control chamber and a second control chamber each in fluid communication with the inlet passage, and a low pressure space;a first outlet check having a closing hydraulic surface exposed to a fluid pressure of the first control chamber and movable between a closed position blocking the first set of nozzle outlets, and an open position;a second outlet check having a closing hydraulic surface exposed to a fluid pressure of the second control chamber and movable between a closed position blocking the second set of nozzle outlets, and an open position;a first injection control valve positioned fluidly between the first control chamber and the low pressure space;a second injection control valve positioned fluidly between the second control chamber and the low pressure space;the first set of nozzle outlets forming a narrower spray angle and having a first combination of outlet number and outlet size, such that the first set of nozzle outlets produces a relatively greater steady flow of fuel for injection;the second set of nozzle outlets forming a wider spray angle and having a second combination of outlet number and outlet size different from the first combination, ...

Fuel injection system

A fuel injector is provided. The fuel injector includes a sleeve having a first end proximate an outlet; a piston slidingly received in the sleeve, the piston having a first end proximate the outlet; a pumping chamber at least partially defined by the sleeve between the first end of the piston and the outlet; and a normally-open inlet valve through which fuel passes to enter the pumping chamber.

FUEL INJECTION DEVICE NOZZLE PLATE

A nozzle plate to be attached to a fuel injection port of a fuel injection device has, in a nozzle plate main body, a nozzle hole through which fuel injected from the fuel injection port passes. Spray direction change means colliding with fuel spray injected from the nozzle hole and changing the travel direction of the fuel spray is integrally formed near an outlet of the nozzle hole of the nozzle plate main body. Accordingly, the travel direction of spray is determined by the spray direction change means according to the shape of the intake pipe, the position of an intake port, and the like. 1. A fuel injection device nozzle plate attached to a fuel injection port of a fuel injection device and having a nozzle hole through which fuel injected from the fuel injection port passes ,wherein the nozzle hole is formed in a nozzle plate main body andspray direction change means colliding with fuel spray injected from the nozzle hole and changing a travel direction of the fuel spray is integrally formed near an outlet of the nozzle hole of the nozzle plate main body.2. The fuel injection device nozzle plate according to claim 1 ,wherein the spray direction change means is a projecting body projecting around the outlet of the nozzle hole, the spray direction change means having an inner wall surface substantially U-shaped in plan view, andthe inner wall surface includes a first inner wall surface part formed in a curved surface and a pair of second inner wall surface parts, the first inner wall surface part projecting so as to surround a part of the outlet of the nozzle hole, the pair of second inner wall surface parts extending from both ends of the first inner wall surface part so as to face each other.3. The fuel injection device nozzle plate according to claim 2 ,wherein the nozzle hole injects fuel toward the inner wall surface of the spray direction change means by causing an interference body to partially block the outlet.4. The fuel injection device nozzle plate ...

Electronic Fuel Injection Throttle Body Assembly

Present embodiments provide an electronic fuel injection throttle body which may be used with a variety of engines of different manufacturers. The throttle body may be used to replace mechanical or hydraulically controlled carburetors with electronic fuel injection. The bores or barrels of the throttle body may comprise one or more stackable fuel injectors. The fuel component cover may include a regulator with a housing formed integrally with the fuel component cover or alternatively, a regulator may be located remotely. 1. A throttle body assembly , comprising:a body having a horizontally extending axis;a first bore and a second bore extending through said body, said first and second bores located on one side of said axis;a fuel component cover disposed on said one side of said axis;each of said first bore and said second bore having a first fuel injector port with a first fuel injector therein and a second fuel injector port that is capable of being machined to receive a second fuel injector;said first fuel injector port and said second fuel injector port vertically aligned along each of said first and second bores;each of said first fuel injector port and said second fuel injector port having a horizontal alignment direction that is perpendicular to a direction of a throttle shaft.2. The throttle body assembly of claim 1 , further comprising a second fuel injector in said second fuel injector port.3. The throttle body assembly of claim 1 , further comprising an electronic control unit cover disposed opposite the fuel component cover on said body.4. The throttle body assembly of claim 1 , said fuel component cover having a first passage claim 1 , a second passage parallel to said first passage claim 1 , and a vertical connecting passage extending between the first passage and the second passage.5. The throttle body assembly of claim 4 , said first passage providing fuel to one of said first fuel injector port or said second fuel injector port.6. The throttle body ...

FUEL INJECTION VALVE

Fuel injection valve with conical valve seat surface that abuts a valve body to seal fuel, fuel injection orifices having an inlet opening formed on the valve seat surface, wherein fuel sprays injected from the plurality of fuel injection orifices include a first fuel spray constituted by a fuel spray injected from at least one fuel injection orifice and a second fuel spray constituted by a plurality of fuel sprays injected at an outer periphery of the first fuel spray, and a fuel injection orifice that injects the first fuel spray constituted with a plane that includes an orifice axis connecting a center of an inlet with a center of an outlet of the fuel injection orifice, parallel to a center axis of the fuel injection valve intersecting a plane, a conical apex that forms the valve seat surface to form an inclination angle that is larger than 0°. 1. A fuel injection valve comprising:a conical valve seat surface that abuts a valve body to seat fuel; anda plurality of fuel injection orifices having an inlet opening formed on the valve seat surface,wherein fuel sprays injected from the plurality of fuel injection orifices include a first fuel spray constituted by a fuel spray injected from at least one fuel injection orifice and a second fuel spray constituted by a plurality of fuel sprays injected at an outer periphery of the first fuel spray, anda fuel injection orifice that injects the first fuel spray is constituted such that a plane that includes an orifice axis connecting a center of an inlet with a center of an outlet of the fuel injection orifice and is parallel to a center axis of the fuel injection valve intersects a plane including a straight line passing through the center of the inlet of the fuel injection orifice and a conical apex that forms the valve seat surface as well as the center axis of the fuel injection valve to form an inclination angle that is larger than 0°.2. The fuel injection valve according to claim 1 , wherein the second fuel spray is ...

Fuel Injector

A dual-mode fuel injector has an internal part containing a variable volume chamber space which fills with fuel at common rail pressure and a plunger which is operable to force fuel out of the variable volume chamber space and to be injected out of the nozzle through the injection orifices at amplified pressure greater than common rail pressure. The plunger and the internal part have respective surfaces which come into mutual abutment during filling of the variable volume chamber space with fuel at common rail pressure and which, when in mutual abutment, create a seal which seals fuel in the variable volume chamber space against escape from the variable volume chamber space past the seal. 1. A fuel injector which is selectively operable to a common rail injection mode and an amplified pressure injection mode , the fuel injector having a longitudinal axis and comprising:a body having a fuel inlet port through which liquid fuel is introduced into the body at a common rail pressure;a nozzle assembly disposed at an axial end of the body, the nozzle assembly comprising a nozzle having injection orifices at a tip end of the nozzle and a needle which is disposed within the nozzle and is biased axially against a seat to close the injection orifices to fuel in the body;an electric injection control actuator which when energized while the fuel injector is in common rail injection mode, is effective to cause the needle to be unseated from the seat and fuel to be injected out of the nozzle through the injection orifices at common rail pressure;a pressure-amplifying mechanism which is internal to the body and comprises an internal part containing a variable volume chamber space which, when the electric injection control actuator is not being energized, fills with fuel at common rail pressure from the fuel inlet port, and a plunger which when the electric injection control actuator is energized to unseat the needle from the seat with the fuel injector in the amplified pressure ...

NOZZLE PLATE FOR FUEL INJECTION DEVICE

The fuel flows from the guide channels into the swirl chamber and is guided to the nozzle hole while swirling in the swirl chamber in the identical direction. The nozzle hole is divided into a portion near a fuel-inflow end and a portion near a fuel-outflow end. The portion near the fuel-outflow end of the nozzle holes has a flow passage cross-sectional area gradually increasing towards a fuel outflow-side opening end, and includes a curved surface formed by smoothly connecting an inner surface of the nozzle holes at an upstream end side in a fuel flow direction to an inner surface of the nozzle holes at the portion near the fuel-inflow end so as to smoothly and gradually increase the flow passage cross-sectional area. The curved surface ensures further thin film-like flow by expanding a flow of the fuel in the nozzle holes by the Coanda effect. 1. A nozzle plate for a fuel injection device disposed opposed to a fuel injection port of the fuel injection device , the nozzle plate having nozzle holes through which fuel injected from the fuel injection port passes , wherein:the nozzle holes are coupled to the fuel injection port via a swirl chamber and fuel guide channels that open into the swirl chamber, and are divided into a portion near a fuel-inflow end and a portion near a fuel-outflow end;the nozzle holes, the swirl chamber, and the fuel guide channels are formed on a plate body portion positioned opposed to the fuel injection port;the swirl chamber is configured to guide the fuel flowed from the fuel guide channels into the nozzle holes while swirling the fuel, and is formed at a side of an inner surface opposed to the fuel injection port of the plate body portion;the portion near fuel-outflow end of the nozzle holes is formed so as to have a flow passage cross-sectional area gradually increasing towards a fuel outflow-side opening end, and includes a curved surface formed by smoothly connecting an inner surface of the nozzle holes at upstream end side in a ...

INJECTOR

An electromagnetically driven injector may include an electromagnetic coil, a movable core, a doughnut-shaped fixed core, a valve, a coil spring, and at least one plate spring. When the electromagnetic coil is not energized, a valve closed state may be maintained by a valve element of the valve normally biased in a valve closed direction by cooperation of the coil spring and the at least one plate spring. When the electromagnetic coil is energized, the valve may be opened by the movable core being attracted to the doughnut-shaped fixed core, the valve element attached to the movable core disposed so as to be attracted to the fixed core disposed on a center of the electromagnetic coil being disposed along a stroke direction in the coil spring, the at least one plate spring being provided at a right angle to the stroke direction of the valve element, a central portion of the at least one plate spring being fixed at a fixation position while sandwiched between the valve element and the movable core, both of the valve element and the movable core being in contact with the fixation position, a peripheral edge portion of the at least one plate spring being fixed while sandwiched on a nozzle side. The fixation position of the movable core and the valve element that sandwich the central portion of the at least one plate spring may be assembled by laser welding. 1. An electromagnetically driven injector comprising:an electromagnetic coil;a movable core;a doughnut-shaped fixed core;a valve having a valve elementa coil spring; andat least one plate spring;wherein, when the electromagnetic coil is not energized, a valve closed state is maintained by the valve element normally biased in a valve closed direction by cooperation of the coil spring and the at least one plate spring, and when the electromagnetic coil is energized, the valve is opened by the movable core attracted to the doughnut-shaped fixed core, the valve element attached to the movable core disposed so as to be ...

METHODS AND SYSTEMS FOR A FUEL INJECTOR

Methods and systems are provided for a fuel injector. In one example, a system may include an injector comprising two or more passages shaped to flow a mixture in opposite directions before injecting the mixture. 1. A system , comprising:an injector comprising a first passage shaped to flow a mixture in a first direction, a second passage fluidly coupled to the first passage and shaped to flow the mixture in a second direction, and a third passage fluidly coupled to the second passage and shaped to flow the mixture in a third direction.2. The system of claim 1 , wherein the first direction and the third direction are identical to one another and opposite to the second direction.3. The system of claim 1 , wherein the third passage is fluidly coupled to a venturi passage claim 1 , the venturi passage having an outlet shaped to eject the mixture from the injector.4. The system of claim 3 , wherein the first passage is arranged distal to a central axis of the injector relative to the second passage and third passage claim 3 , and where an inlet to the first passage is arranged upstream in the injector of the second passage and third passage so that the first passage receives the mixture before the second and third passages claim 3 , where the first passage extends in the first direction toward a plurality of lower openings arranged adjacent to the outlet claim 3 , and where the lower openings form an inlet to the second passage from the first passage claim 3 , where a line normal to the lower openings is arranged perpendicular to the central axis so that the mixture flows in a fourth direction parallel to the line through the lower openings claim 3 , the fourth direction perpendicular to the first direction.5. The system of claim 4 , wherein the second passage is arranged closer to the central axis than the first passage claim 4 , the second passage extending in the second direction claim 4 , away from the lower openings and toward a plurality of upper openings arranged ...

Wear-Optimised Production of Conical Injection Holes

A method for producing injection holes in fuel injection nozzles for internal combustion engines. An injection hole is formed by at least one abrading manufacturing method. An injection nozzle is subsequently subjected to a hardening treatment at least in the region of the injection hole, such that the injection hole surface is hardened over the entire axial length thereof. 1. A method for producing spray holes in fuel injection nozzles for internal combustion engines , comprising:forming a spray hole in a fuel injection nozzle using at least one material-removing manufacturing process; andhardening at least a region of the fuel injection nozzle comprising the spray hole with a hardening treatment such that the an entirety of an axial length of a surface of the spray hole is hardened.2. The method as claimed in claim 1 , wherein the entirety of the axial length of the surface of the spray hole is hardened uniformly.3. The method as claimed in claim 1 , wherein the spray hole is defined by a conical shape or comprises a conical region.4. The method as claimed in claim 3 , wherein a diameter of the spray hole continuously decreases in a throughflow direction.5. The method as claimed in claim 1 , wherein forming the spray hole by comprises erosion or laser machining6. The method as claimed in claim 1 , wherein the hardening treatment comprises a surface hardening process.7. The method as claimed in claim 1 , wherein the hardening treatment comprises nitriding or a heat treatment.8. The method as claimed in claim 1 , wherein the spray hole is formed in non-hardened material of the fuel injection nozzle.9. The method as claimed in claim 1 , wherein the fuel injection nozzle is produced by hot isostatic pressing.10. A fuel injection nozzle for internal combustion engines claim 1 , comprising:at least one spray hole, is defined by a non-cylindrical form, wherein an entirety of an axial length of a region of the at least one spray hole and an entirety of an axial length of ...

Device for metering fuel

The invention relates to a device for metering two different liquid or gaseous fuels, comprising a nozzle element ( 4 ) in which a first pressure chamber ( 6 ) that can be filled with a first fuel is formed, wherein an outer nozzle needle ( 10 ) is received in the pressure chamber in a longitudinally movable manner. The outer nozzle needle ( 10 ) is equipped with a second pressure chamber ( 12 ) which can be filled with a second fuel and in which an inner nozzle needle ( 15 ) is arranged in a longitudinally movable manner, said inner nozzle needle interacting with an inner nozzle seal ( 16 ) formed in the outer nozzle needle ( 10 ) in older to open and close at least one inner injection opening ( 17 ). Furthermore, at least one outer injection opening ( 13 ) is provided which can be connected to the first pressure chamber ( 6 ), the at least one outer injection opening ( 13 ) being formed in the outer nozzle needle ( 10 ).