ТОПЛИВНЫЙ НАСОС

Изобретение относится к двигателестроению, в частности к топливной аппаратуре двигателей внутреннего сгорания. Изобретение позволяет обеспечить надежную изоляцию топлива от подшипника и повысить герметичность уплотнения. Топливный насос для подачи топлива в двигатель внутреннего сгорания содержит корпус по меньшей мере с одной топливной полостью, по меньшей мере один рабочий орган, сообщающийся с топливной полостью и служащий для подачи топлива. По меньшей мере один привод смонтирован в корпусе по меньшей мере в одной опоре и приводит в действие рабочий орган. Между топливной полостью и опорой предусмотрена по меньшей мере одна разделительная камера, в которой находится разделительная среда, подаваемая двигателем внутреннего сгорания по меньшей мере опосредованно. 12 з.п. ф-лы, 4 ил.

ТОПЛИВНЫЙ НАСОС ВЫСОКОГО ДАВЛЕНИЯ

Изобретение относится к двигателестроению, в частности к топливным насосам высокого давления для двигателей внутреннего сгорания. Изобретение позволяет снизить трение и шум при работе насоса. Топливный насос содержит насосно-распределительное звено. Привод осуществляется через муфту Ольдгема от приводного вала. Передача момента в муфте Ольдгема осуществляется на выполненных по принципу опоры качения плоскостях передачи. 5 з.п. ф-лы, 1 ил.

ТОПЛИВНАЯ СИСТЕМА И СПОСОБ СНИЖЕНИЯ УТЕЧКИ ТОПЛИВА ИЗ ТОПЛИВНОЙ СИСТЕМЫ

Изобретение может быть использовано в системах топливоподачи двигателей внутреннего сгорания (ДВС). Предложена топливная система (1) для подачи сжатого топлива, в частности диметилэфира или его смеси, в ДВС. Топливная система (1) содержит топливный насос (4), механизм (10, 11) которого частично размещен в картере (16), содержащем смазочное масло, дренажную линию (24) для отвода паров топлива из внутреннего пространства картера (16), линию (22) подачи смазочного масла из картера (16). В системе (1) предусмотрен клапан (31) подачи смазочного масла, установленный в линии (22), уплотнительное средство (21), установленное между насосным механизмом (10, 11) и картером (16) для предотвращения утечки по меньшей мере смазочного масла наружу из картера (16), и дренажный клапан (30), установленный в дренажной линии (24). Управление клапанами (30) и (31) осуществляется так, что они закрыты при неработающем двигателе для предотвращения просачивания паров топлива из картера (16). Технический результат ...

ТОПЛИВНЫЙ НАСОС ВЫСОКОГО ДАВЛЕНИЯ

Полезная модель относится к области дизельного двигателестроения, а именно к топливным насосам высокого давления топливных систем типа Common Rail (далее - ТНВД).Топливный насос высокого давления включает корпус 1, по крайней мере, одну втулку 2 плунжера и вал 7 с эксцентриковой частью, на которую установлен кольцеобразный кулачок 6 с запрессованным подшипником 8 скольжения. Во втулку 2 плунжера установлены плунжер 3, толкатель 4 и пружина 5 плунжера. Кольцеобразный кулачок 6 имеет плоские участки по числу втулок плунжера. Толкатель 4 выполнен в виде единой детали в форме тела вращения. На опорном торце толкателя, контактирующем с плоским участком кольцеобразного кулачка, выполнена центральная сферическая впадина глубиной до 5,5 мкм и площадью проекции на диаметральную плоскость толкателя от 35% до 45% от площади проекции опорного торца толкателя на ту же плоскость.Применение предлагаемой полезной модели позволяет повысить технологичность конструкции и ее надежность в эксплуатации.

Секция топливная электроуправляемая

Изобретение может быть использовано в системах топливоподачи двигателей внутреннего сгорания. Изобретение позволяет упростить конструкцию и снизить трудоемкость изготовления, а также повысить эффективность эксплуатации электроуправляемой топливной секции топливного насоса высокого давления. Согласно изобретению в верхней части корпуса 1 расположен электроуправляемый клапан 2, перпендикулярно которому установлен штуцер 3. С торцевой стороны корпуса 1 расположен электромагнит 7, представляющий собой неразборную сборочную единицу, состоящую из корпуса 18, катушки 21, каркаса 19 и сердечника 20, причем катушка 21 электромагнита намотана на П-образный сердечник 20 поперечно. В полости штуцера 3 установлен стабилизатор 4, поджимаемый пружиной 5 и фиксируемый упором 6, причем уплотнение упора 6 и корпуса 1 достигается за счет разности углов конусов контактных поверхностей. На торце стабилизатора 4 выполнено отверстие, диаметр которого варьируется от 0,35 до 2,0 мм в зависимости от требований.

ТОПЛИВНАЯ СИСТЕМА И СПОСОБ СНИЖЕНИЯ УТЕЧКИ ТОПЛИВА ИЗ ТОПЛИВНОЙ СИСТЕМЫ

... 1. Топливная система (1) для подачи сжатого топлива, в частности диметилэфира или его смеси, в двигатель внутреннего сгорания, содержащая топливный насос (4), механизм (10, 11) которого частично размещен в картере (16), содержащем смазочное масло, и дренажную линию (24), присоединенную к картеру (16) для отвода по меньшей мере паров топлива из внутреннего пространства картера (16), отличающаяся тем, что она дополнительно содержит:линию (22) подачи смазочного масла, присоединенную к картеру (16);клапан (31) подачи смазочного масла, установленный в линии (22) подачи смазочного масла;уплотнительное средство (21), установленное между насосным механизмом (10, 11) и картером (16) для предотвращения утечки по меньшей мере смазочного масла наружу из картера (16);дренажный клапан (30), установленный в дренажной линии (24);причем дренажный клапан (30) и клапан (31) подачи смазочного масла выполнены с возможностью управления таким образом, что они закрыты, когда двигатель не работает, для предотвращения ...

УСТРОЙСТВО, В ЧАСТНОСТИ НАСОСНОЕ УСТРОЙСТВО, ДЛЯ БОЛЬШОГО ДИЗЕЛЬНОГО ДВИГАТЕЛЯ И СПОСОБ ЕГО ОЧИСТКИ

... 1. Устройство (1), в частности насосное устройство, для большого дизельного двигателя, содержащее:впускное продувочное отверстие (6),продувочный трубопровод (5), с которым по текучей среде сообщается впускное продувочное отверстие (6), изакрывающий элемент (2), отличающееся тем, чтозакрывающий элемент (2) изготовлен из первого материала, имеющего коэффициент температурного расширения, отличный от коэффициента температурного расширения второго материала, в котором выполнено впускное продувочное отверстие (6), причем закрывающий элемент (2) имеет такую конструкцию и расположен у впускного продувочного отверстия (6) таким образом, что впускное продувочное отверстие (6) может быть закрыто закрывающим элементом (2) в зависимости от температуры.2. Устройство по п. 1, отличающееся тем, что первый материал имеет более низкий коэффициент температурного расширения, чем второй материал.3. Устройство по п. 1 или 2, отличающееся тем, что закрывающий элемент (2) имеет разные геометрические расширения ...

ИНЖЕКТОРНАЯ ФОРСУНКА ДЛЯ ВПРЫСКИВАНИЯ СМАЗОЧНОГО МАСЛА В ЦИЛИНДРЫ ДВИГАТЕЛЯ И ЕЕ ПРИМЕНЕНИЕ

... 1. Инжекторная форсунка (101), предназначенная для впрыскивания смазочного масла внутрь цилиндров крупных двигателей и содержащая монтажные средства для закрепления в стенке (102) цилиндра, шток (1) форсунки, проходящий через стенку цилиндра, и по меньшей мере одно сопло (25) форсунки на внутреннем конце штока форсунки, при этом шток (1) форсунки содержит клапан с цилиндрической расточкой (21) седла клапана, в котором предусмотрен перемещаемый корпус (3) клапана, имеющий цилиндрическую уплотняющую поверхность (3a, 3b), взаимодействующую с цилиндрической расточкой (21) седла клапана в штоке форсунки, причем корпус (3) клапана имеет увеличенную головку (11) на своем наружном конце и контактную поверхность для пружины (2), расположенной вокруг корпуса (3) клапана для обеспечения подпружиненного закрытия клапана, при этом шток (1) форсунки содержит проход (26) для масла под давлением для подачи масла под давлением в камеру (27) давления, в которой масло под давлением имеет возможность приложения ...

Топливный насос высокого давления для двигателей внутреннего сгорания

Топливовпрыскивающий насос роторного типа

Топливный насос для двигателя внутреннего сгорания

Pumpedüse

The invention relates to a pump nozzle (1) for injecting fuel into an internal combustion engine, especially a single cylinder diesel engine, comprising a piston foot (3), a pump cylinder (8), a pump piston (7), an intermediate disk (16), and an injection nozzle with a pressure spring (14), a pressure spring plate (15) and a nozzle needle (20). The inventive pump nozzle has a reduced construction length by virtue of the pressure spring (14) being offset to the side of the nozzle needle axis.

Kolbenpumpe zum Einspritzen von Brennstoff

Kolbenpumpe und nockenbetriebenes Element von dieser

Die vorliegende Anmeldung offenbart eine Kolbenpumpe und ein nockenbetriebenes Element von dieser. Die Kolbenpumpe umfasst ein Gehäuse, eine Nockenwelle, einen Kolben und ein nockenbetriebenes Element. Ein Stift des nockenbetriebenen Elements umfasst, verteilt entlang seiner axialen Richtung, einen ersten Bereich, einen dritten Bereich und einen zweiten Bereich, wobei sich der dritte Bereich zwischen dem ersten Bereich und dem zweiten Bereich befindet, der erste Bereich in einem ersten Stiftloch eines Mitnehmerkörpers installiert ist, der zweite Bereich im zweiten Stiftloch installiert ist, sich der dritte Bereich in einem rollenden Hohlraum des Mitnehmerkörpers befindet, der Durchmesser des ersten Bereichs nicht größer ist als der Durchmesser des zweiten Bereichs und der erste Bereich und das erste Stiftloch derart zusammengepasst sind, dass sie nicht zu einer relativen Drehung fähig sind. Eine Rolle ist auf dem dritten Bereich des Stifts installiert, sodass sie in der Lage ist, sich relativ ...

Radialkolbenpumpe zur Kraftstoffhochdruckversorgung

Hochdruckpumpe und Verfahren zum Betrieb einer Hochdruckpumpe

Verfahren zum Betrieb einer Hochdruckpumpe, wobei die Hochdruckpumpe (100) umfasst: – einen Pumpenkörper (101), der eine Kompressionskammer (105) bildet, – ein Einlassventil (110), das eine Verbindung zwischen einer Einlasspassage (108) und der Kompressionskammer (105) öffnet und schließt, – ein Auslassventil (120), das eine Verbindung zwischen der Kompressionskammer (105) und einer Auslasspassage (109) öffnet und schließt, – ein Kompressionsmittel (106), das eine Hebe- und Senkbewegung ausführt und in der Kompressionskammer (105) enthaltenen Kraftstoff mit Druck beaufschlagt, – einen Drucksensor (102), der in der Kompressionskammer (105) angeordnet ist; wobei ein Verlauf des Drucks (PC) in der Kompressionskammer (105) bezüglich der Hebe- und Senkbewegung des Kompressionsmittels (106) erfasst wird und wobei das Vorliegen einer unzulässigen Kraftstoffqualität aus einer Abweichung des erfassten Verlaufs von einem bekannten Verlauf für die Änderung des Drucks (PC‘) in der Kompressionskammer ...

Gasfeste Kraftstoffpumpe für LPG-Systeme (Gaspumpe für Flüssiggaseinspritzung (LPI) bei Verbrennungsmotoren)

Die Schutzansprüche richten sich an den konstruktiven Aufbau der gasfesten Pumpe durch die wesentlichen Merkmale der 3 Metalllagerungen (1). Je ein radiales Metalllager auf der Saug- sowie der Druckseite im Pumpenkörper für die Gleitlagerpaarung mit der Rotorwelle (A & B) und ein axiales Metalllager im Pumpenboden (C) für die Aufnahme der Axialkräfte, ausgeübt durch die Federkräfte über die Kohlestifte. Des weiteres richtet sich der Schutzanspruch an den Entfall der Mitnehmerscheibe für das Turbinenrad. Dieses wird durch eine formschlüssige Verbindung zwischen Turbinenrad und Rotorwelle gewährleistet (2). 1. Konstruktiver Aufbau der gasfesten Pumpe durch 3 Metalllagerungen 2. Formschlüssige Verbindung zwischen Turbinenrad und Rotorwelle bei Entfall der Mitnehmerscheibe für das Turbinenrad.

Kraftstoff-Hochdruckpumpe

Kraftstoff-Hochdruckpumpe (10) mit einem Befestigungsflansch (40), welcher in Einbaulage mittels eines Befestigungsmittels (52) an einem Haltekörper (38) befestigt werden kann, wobei die Kraftstoff-Hochdruckpumpe (10) einen Abstandsabschnitt (47) aufweist, welcher in Einbaulage einen Abstand zwischen dem Haltekörper und einem Befestigungsabschnitt (48) des Befestigungsflansches (40) bewirkt.

Filterelement für flüssiges Medium und Pumpe mit Filterelement

Es wird ein Filterelement (10) für flüssiges Medium vorgeschlagen, das insbesondere in einer Kraftstoffhochdruckpumpe verwendet wird. Das Filterelement (10) weist wenigstens ein erstes Trägerelement (12) und einen vom Medium durchströmten Filterkörper (46) auf. Im ersten Trägerelement (12) ist wenigstens eine erste Bypassöffung (24) vorgesehen, durch die Medium unter Umgehung des Filterkörpers (46) durch das Filterelement (10) strömen kann. Das Filterelement (10) weist außerdem ein in Durchströmrichtung (47) des Filterelements (10) gesehen nach dem ersten Trägerelement (12) angeordnetes zweites Trägerelement (32) auf, in dem wenigstens eine zweite Bypassöffnung (44) vorgesehen ist, durch die Medium unter Umgehung des Filterkörpers (46) strömen kann. Die wenigstens eine zweite Bypassöffnung (44) ist bezüglich der wenigstens einen ersten Bypassöffnung (24) quer zur Durchströmrichtung (47) des Filterelements (10) versetzt angeordnet.

KRAFTSTOFFEINSPRITZPUMPE FUER BRENNKRAFTMASCHINEN

Kolbenpumpe, insbesondere Brennstoffeinspritzpumpe fuer Diesel- und Ottomotoren

KRAFTSTOFFEINSPRITZPUMPE FUER BRENNKRAFTMASCHINEN

Fuel injection pump for internal combustion engines

Fuel injection pump for internal combustion engines, especially with a plurality of pump elements arranged in series, the start of delivery of each of which is controlled by a control slide valve axially displaceable on the pump piston and by control of relief ducts of the pump working chambers, the control slide valve being actuated by way of a torque shaft (12), in that in each case an adjusting pin (14) of a slide (15), connected to the torque shaft (12), engages in a transverse groove of the control slide valve, the adjusting pin (14) having a cylindrical section (42) and a slide shoe (43) supported on the latter, and the slide shoe (43) being secured against axial displacement by a head (44) of the adjusting pin (14). ...

Kraftstoff-Einspritzpumpe fuer Brennkraftmaschinen, insbesondere Benzin-Einspritzpumpe

Kraftstoffsystemverbesserungen mit Hochdruckpumpe für Schweißgeneratoren

Motorgetriebener Generator, welcher Folgendes aufweist:- einen Motor, wobei der Motor dazu ausgebildet ist, einen Generator anzutreiben;- einen Kraftstofftank; und- eine mit dem Motor und dem Kraftstofftank wirkverbundene Kraftstoffpumpe, wobei die Kraftstoffpumpe dazu ausgebildet ist, Kraftstoff von dem Kraftstofftank zu dem Motor zu pumpen, und wobei die Kraftstoffpumpe innerhalb des Kraftstofftanks angeordnet ist.

OElabdichtvorrichtung fuer den Arbeitskolben einer Brennstoffeinspritzpumpe

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.

Hochdruckpumpe

Eine Hochdruckpumpe (1), die insbesondere als Radial- oder Reihenkolbenpumpe für Brennstoffeinspritzanlagen von luftverdichtenden, selbstzündenden Brennkraftmaschinen dient, umfasst ein Gehäuse (2), eine in dem Gehäuse (2) gelagerte Antriebswelle (3), zumindest einen mit dem Gehäuse (2) verbundenen Zylinderkopf (6) und eine an dem Zylinderkopf (6) angeordnete Pumpenbaugruppe (14), die von der Antriebswelle (3) antreibbar ist. Dabei umfasst der Zylinderkopf (6) ein erstes Zylinderkopfteil (7) und ein zweites Zylinderkopfteil (8). Die Pumpenbaugruppe (14) umfasst einen Pumpenarbeitsraum (18), der in dem ersten Zylinderkopfteil (7) ausgestaltet ist. Dabei ist der Zylinderkopf (6) über das zweite Zylinderkopfteil (8) mit dem Gehäuse (2) verbunden. Das erste Zylinderkopfteil (7) ist aus einem hochdruckfesten Werkstoff gebildet, während das zweite Zylinderkopfteil (8) aus einem kostengünstigen Werkstoff gebildet ist.

Hochdruck-Dieseltreibstoffpumpe mit zweiteiligem Pumpenkolben

Hochdruckpumpe für ein Kraftstoffeinspritzsystem

Die Erfindung betrifft eine Hochdruckpumpe für ein Kraftstoffeinspritzsystem, insbesondere ein Common-Rail-Einspritzsystem, umfassend ein Gehäuseteil (1) mit einer Bohrung (2), in welcher ein Pumpenkolben (3) hubbeweglich aufgenommen ist, der über eine Stößelbaugruppe (4) an einem Nocken (5) oder Exzenter abgestützt ist und in axialer Richtung einen Pumpenarbeitsraum (6) begrenzt, der über ein in die Hochdruckpumpe integriertes Saugventil (7) mit Kraftstoff befüllbar ist. Erfindungsgemäß ist im Gehäuseteil (1) eine Zulaufbohrung (8) zur Versorgung des Saugventils (7) mit Kraftstoff ausgebildet, die an eine einen Pumpeninnenraum (9) und einen Stößelraum (10) verbindende Bohrung (11) eines weiteren Gehäuseteils (12) angeschlossen ist.

PUMPE, INSBESONDERE FÜR EINE KRAFTSTOFFEINSPRITZEINRICHTUNG FÜR EINE BRENNKRAFTMASCHINE

Überströmventil zur Druckregelung in einem Niederdruckkreislauf eines Kraftstoffeinspritzsystems, Kraftstoffeinspritzsystem

Die Erfindung betrifft ein Überströmventil (1) zur Druckregelung in einem Niederdruckkreislauf (2) eines Kraftstoffeinspritzsystems, insbesondere eines Common-Rail-Einspritzsystems, umfassend einen Ventilkolben (3), der zur Verbindung eines Ventileingangs (4) mit mindestens einem Ventilausgang (5) axial verschiebbar in einem Ventilträger (6) aufgenommen ist, wobei der Ventilkolben (3) in Richtung des Ventileingangs (4) von der Federkraft einer Feder (7) beaufschlagt ist. Erfindungsgemäß weist der Ventilkolben (3) eine mehrere ringförmige Steuerkanten (8, 9, 10) ausbildende Außenkontur auf, wobei die Steuerkanten (8, 9, 10) mit dem Ventilausgang (5) sowie mit mindestens einer weiteren im Ventilträger (6) ausgebildeten Öffnung (11) zusammenwirken, so dass das Überströmventil (1) eine mehrstufige Öffnungscharakteristik besitzt.Ferner betrifft die Erfindung ein Kraftstoffeinspritzsystem mit einem Niederdruckkreislauf (2), in den ein erfindungsgemäßes Überströmventil (1) integriert ist.

Hochdruckpumpe mit integriertem Saugventil

Die Erfindung betrifft eine Hochdruckpumpe für ein Kraftstoffeinspritzsystem, insbesondere ein Common-Rail-Einspritzsystem, umfassend ein Gehäuseteil (1) mit einer Zylinderbohrung (2), in der ein Hochdruck-Elementraum (3) ausgebildet ist, wobei in das Gehäuseteil (1) zur Befüllung des Hochdruck-Elementraums (3) mit Kraftstoff ein Saugventil (4) integriert ist, das einen hubbeweglichen und von der Federkraft einer Schließfeder (5) belasteten Ventilstößel (6) umfasst, der mit einem im Gehäuseteil (1) ausgebildeten Ventilsitz (7) zusammenwirkt. Erfindungsgemäß ist im Gehäuseteil (1) konzentrisch zum Ventilsitz (7) ein als Zulauf für das Saugventil (4) dienender ringförmiger Niederdruckraum (8) ausgebildet, in dem ein ringförmiges Siebelement (9) aufgenommen ist.

Suction valve for fuel supply system of internal combustion engine, has valve body for intake process, through which fuel reaches from low pressure area of fuel supply system to pump chamber of high pressure pump

The suction valve (1) has a valve body (8) for an intake process, through which fuel reaches from a low pressure area of a fuel supply system to a pump chamber (5) of a high pressure pump. Multiple suction holes (10) are formed, which work together with a radial outer portion (13) of the valve body. A spring element (16) is designed as an externally located spring element, which surrounds the outer side of the valve body.

System zum Fördern eines Fluides

System (46), insbesondere für ein Kraftfahrzeug, zum Fördern eines Fluides, insbesondere Kraftstoff, z. B. Diesel, mit einer Hochdruckpumpe (1), einer Vorförderpumpe (35) zur Förderung des Fluides zu der Hochdruckpumpe (1) und einer Einrichtung (35) zur Steuerung der Förderleistung, die Hochdruckpumpe (1), umfassend eine Antriebswelle (2) mit wenigstens einem Nocken (3), wenigstens einen Kolben (5), wenigstens einen Zylinder (6) zur Lagerung des wenigstens einen Kolbens (5), einen Arbeitsraum (29), wobei sich der wenigstens eine Kolben (5) mittelbar mittels wenigstens einer Laufrolle (10) auf der Antriebswelle (2) mit dem wenigstens einen Nocken (3) abstützt, so dass von dem wenigstens einen Kolben (5) eine Translationsbewegung aufgrund einer Rotationsbewegung der Antriebswelle(2) ausführbar ist, wobei die Einrichtung (35) die Vorförderpumpe (35) ist und die Vorförderpumpe (35) in der Förderleistung steuerbar ist.

Verfahren und Steuerungseinrichtung zum Betreiben einer Common-Rail Kraftstoffversorgungsanlage

Verfahren zum Betreiben einer Common-Rail Kraftstoffversorgungsanlage einer Brennkraftmaschine, die einen Niederdruckbereich (4), einen Hochdruckbereich (6) und eine mindestens zwei Hochdruckpumpen (2) aufweisende Hochdruckpumpeinrichtung (3) aufweist, mit der Kraftstoff aus dem Niederdruckbereich in den Hochdruckbereich förderbar ist, wobei im Hochdruckbereich (6) zwischen der Hochdruckpumpeinrichtung (3) und Injektoren (1) ein permanent unter Hochdruck stehendes Druckspeichersystem (7) vorgesehen ist, und wobei eine Fördermenge der Hochdruckpumpeinrichtung (3) über Drosselventile (13) einstellbar ist. Abhängig von einem Betriebspunkt der Brennkraftmaschine werden eine Soll-Fördermenge der Hochdruckpumpeinrichtung (3) und ein Soll-Druck für das Druckspeichersystem (7) bestimmt. Abhängig von der Soll-Fördermenge wird für alle Drosselventile (13) ein Steueranteil für die Stellung des jeweiligen Drosselventils (13) bestimmt, mit welchem dasselbe angesteuert wird. Abhängig von einer Abweichung ...

Antriebssystem einer Kraftstoff-Hochdruckpumpe, Kraftstoff- Hochdruckpumpen-Baugruppe sowie Verbrennungsmotor

Die vorliegende Erfindung betrifft ein Antriebssystem einer Kraftstoff-Hochdruckpumpe eines Verbrennungsmotors, mit einem Antriebsstrang, der antriebsseitig mit einer Kurbelwelle gekoppelt ist und abtriebsseitig mit einer ventilsteuernden Nockenwelle, und mit wenigstens einem Antriebssystem-Nocken, der die Kraftstoff-Hochdruckpumpe unmittelbar antreibt und entfernt von der ventilsteuernden Nockenwelle im Antriebsstrang sitzt, wobei das Antriebssystem keine Kette und keinen Zahnriemen zum Antrieb des Antriebssystem-Nocken aufweist. Des Weiteren betrifft die vorliegende Erfindung eine Kraftstoff-Hochdruckpumpen-Baugruppe sowie einen Verbrennungsmotor.

Kraftstoff-Hochdruckpumpe für ein Kraftstoffsystem einer Brennkraftmaschine

Kraftstoff-Hochdruckpumpe für ein Kraftstoffsystem einer Brennkraftmaschine umfasst einen Kanal (18) und einen in dem Kanal (18) angeordneten Kraftstofffilter (20), wobei der Kraftstofffilter (20) insgesamt eine in etwa zylindrische topfartige Form hat mit einem ringförmigen Befestigungsabschnitt (34), der in dem Kanal (18) gehalten ist. Es wird vorgeschlagen, dass eine den Befestigungsabschnitt (34) im Kanal (18) festlegende Kontaktfläche (40) zwischen Befestigungsabschnitt (34) und Kanal (18) kleiner ist als eine radiale Außenfläche (36) des Befestigungsabschnitts (34).

Kolbenpumpe, insbesondere Hochdruck-Kraftstoffpumpe für ein Einspritzsystem einer Brennkraftmaschine

Eine Kolbenpumpe (10), insbesondere Hochdruck-Kraftstoffpumpe für ein Einspritzsystem einer Brennkraftmaschine, mit einem Kolben (22) und einem Arbeitsraum (24), der von dem Kolben (22) begrenzt wird, wobei der Kolben (22) einen Laufflächenabschnitt (26) aufweist, über den der Kolben (22) mittels eines Führungselements (28) geführt ist, ist derart ausgestaltet und weitergebildet, dass sich der Laufflächenabschnitt (26) des Kolbens (22) zu seinem dem Arbeitsraum (24) zugewandten Ende (32) hin im Querschnitt verjüngt.

Kraftstoffpumpe mit veränderlicher Durchflussmenge

Kraftstoffeinspritzeinrichtung mit einer Hochdruckkraftstoffpumpe mit variabler Durchflussmenge

Fuel-injection system for internal combustion engine for vehicle has metering valves which are selectively closed or opened according to target discharge amount in time of adjusting fuel flow volume supplied to high-pressure pump

The fuel-injection system has a normally open type first metering valve (9a) and a normally closed type metering valve (9b). When the target discharge amount is in low discharge amount area in time of adjusting fuel flow volume supplied to a high-pressure pump (7), second metering valve is fully closed and first metering valve is opened. When target discharge amount is in the high discharge amount area, the metering valves are opened.

Fuel pump, particularly high pressure fuel pump of common-rail-fuel system, has pump piston supported in pump cylinder in movable manner and pump piston has opening, which is cooled from inside by pump piston

The fuel pump (10) has a pump piston (12) supported in a pump cylinder (11) in movable manner. The pump piston has an opening (14), which is cooled from inside by the pump piston. The opening is formed as closed opening and is partly filled with the cooling medium (15). The cooling medium (15) causes by the movement of the pump piston (12) is moved in the opening.

Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine

Die vorliegende Erfindung betrifft eine Kraftstoff-Hochdruckpumpe (10) für eine Brennkraftmschine mit Direkteinspritzung, mit einem Pumpengehäuse (58), einem einlassseitigen Niederdruckbereich (12) und einem auslassseitigen Hochdruckbereich (14). Die Kraftstoff-Hochdruckpumpe (10) weist dabei eine rein mechanische Druckregeleinrichtung (54) zur Regelung eines konstanten Drucks im Hochdruckbereich (14) auf.

High pressure fuel pump for common rail injection system of diesel engine, includes centrifugal separator with rotor mechanically coupled to pump drive

The high pressure pump (14) for diesel (or other fluid) includes a pump casing (23) with a cavity (22). This contains the drive unit (40, 42) connected to a pump unit (34) which delivers the fluid. The pump includes a high pressure chamber (27). Downstream of the pump housing cavity (22) and upstream of the high pressure chamber, there is a centrifugal separator (30). This has a rotor causing rotary movement of the fluid. The pump drive is mechanically coupled to turn the rotor.

INJECTION UNIT

High pressure fuel pump

High pressure fuel pump

Fuel pressure intensifying device for an internal combustion engine

A fuel supply system for an internal combustion engine has a low pressure source 5, a high pressure pump 1, a fuel injection nozzle valve 7 and a hydraulic intensification device 13 positioned between the high pressure pump 1 and the nozzle valve 7. The intensification device comprises a stepped pistol, 19 whose end faces each define a pressure chamber 23, 27 and a supply duct, which contains a non return pressure valve 45 and preferably a rod filter 57, and allows chamber 27 to be filled with fuel from chamber 23. Pressure intensification results from the different surface areas D1, D2 of the end faces of the piston 19 and is proportional to their ratio. In this embodiment the supply duct is provided by a through-going bore 43 in the piston 19. In other embodiments (figure 2A, 3A, 3B) the supply duct may be provided in the housing of the device. A restoring force may be exerted on the stepped piston 19 by a spring 37 which abuts against an annular collar 29 on the piston 19.

A fuel pump with means to minimise side loads on plunger

A high pressure fuel pump 100 comprises a pump barrel 116 containing a bore 120, a pump plunger 122, which reciprocates inside the bore 120, and a force transmitting device 144 for transmitting axial loads from a cam driven tappet assembly 124 to the plunger 122 while minimising side loads on the plunger 122. The force transmitting device 144 comprises an extension member 146 attached to the tappet assembly 124 and extending into the inner radial extent of a biasing spring 142 and including a distal end 154 positioned in uncoupled abutment against an end of the pump plunger 122 to form a force transmitting interface 169. The pump plunger 122 and extension member 146 are capable of relative lateral movement at the interface 169 which is positioned at a spaced axial distance from the outer end of the pump barrel. The extension member 146 is dimensioned to minimise the spaced axial distance D1' between the outer end of the pump barrel 116 and the interface 169 when the plunger 122 is in a ...

Seals for fuel injection pumps for internal combustion engines

In a fuel injection pump which is to be sealed off from the outside by a shaft seal, there is a risk that the seal will be subjected to heavy stress by leakage flows because of the high internal pressure in the chamber, and will hence wear rapidly. The leakage flow is reduced by an element 6 which surrounds the drive shaft 2 in the manner of a sliding bearing and is both axially and radially displaceable against surrounding housing parts, as well as by a relief line 12, which connects the relief chamber 8 to the suction side 13 of the feed pump 4 and draws off the leakage flow by the vacuum, prevailing at this location. This solution is particularly suitable for designs in which, for reasons of cost, a roller bearing 3 is provided in place of a sliding bearing for guiding the drive shaft 2. ...

I.c. engine unit fuel injector with variable rate plunger return spring

The fuel injector, particularly for use in a diesel engine which is equipped with an engine brake governed by a hydraulic circuit, includes an injector body (39) with a hollow interior, a plunger (41) located within the injector body (39), a moveable coupling (45) positioned within the injector body (39) and a variable rate return spring (36) which is positioned between the injector body (39) and the moveable coupling (45). The variable return spring (36) is designed with a variable pitch between adjacent coils such that the pitch between coils near the end(s) of the spring (36) is reduced over that near the centre of spring (36). The use of the variable rate spring (36) reduces premature fatigue failures caused by the return spring (36) oscillating at or above its natural frequency due to the exhaust valve opening and closing events being transmitted directly through the engine brake hydraulic circuit to the injectors (35) by way of the injector push tube. With the variable rate spring ...

Fuel-injection pump for internal combustion engines

Fuel injection pump for internal combustion engines

A fuel injection pump for internal combustion engines has a plurality of in-line pump pistons driven by a camshaft (1) which is journalled in at least two loose radial bearings (3). The camshaft (1) is also secured axially in both axial directions by means of a fixed axial bearing (14, 15, 16). The axial bearing may comprise half discs (15, 16) secured by bolts (17) to the housing (5), the half-discs being received in an annular groove (14) formed in the camshaft. In an alternative arrangement a nut having a spacer portion is screwed onto the camshaft to define the annular groove and enable an un-split bearing disc to be used. ...

Fuel injector having a press-in valve seat

DISTRIBUTOR PUMP FOR INJECTING FUEL INTO INTERNAL COMBUSTION ENGINES

Injection pump

Liquid fuel injection pumps

... 988,554. Fuel injection pumps. BRYCE BERGER Ltd. March 18, 1964 [March 25, 1963], No. 11642/63. Heading F1A In a fuel injection pump, the inlet chamber 6 into which the pump spills through the port 9, has a sleeve 11 of spring steel to protect the chamber wall from erosion.

Fuel injection pump

A fuel injection pump including a pump body formed with a plunger sliding bore, and a discharge valve mounted on one end portion of the plunger sliding bore corresponding to an upper end portion of a plunger so that said end portion of the plunger sliding bore functions as a guide for the discharge valve. This arrangement enables the plunger barrel and discharge valve guide member of a fuel injection pump of the prior art to be dispensed with and permits the number of the parts of the pump, the size of the pump, the weight of the pump and the production to be reduced.

Cam actuated fuel pump

A fuel pump 12 of a fuel injection equipment 10 of an internal combustion engine comprises a camshaft 18, located in a cambox 14, cooperating with a piston. The camshaft comprises a shaft member 38 and a cam member 16 that comprises a core 44 fixed on the shaft and an outer sleeve 48 arranged over the core. The piston cooperates with an outer face 32 of said sleeve with the core being narrower than the sleeve so that an annular recess 50, 52 is defined on at least one side of the cam. The outer sleeve may be integral to the core and / or is inserted over the core. The cam and / or the core may be integral to the shaft. A front annular recess 50 may be defined by the core and the outer sleeve on the front side 34 and a rear annular recess 52 on the rear side 42 of the cam.

Multi-head-pump for diesel injection equipment

Reciprocable plunger fuel injection pump

A reciprocable plunger fuel injection pump includes a plunger 14 mounted in a pump barrel 10. A spring abutment 15 is secured to the plunger and is engaged by one end of a spring 17 the other end of which engages a further spring abutment 16 slidable about the barrel. The barrel is provided with transverse apertures 25 which locate balls 26 which are held in an operative position by the abutment 16. The balls can be engaged by a step 24 on the plunger to limit the outward movement of the plunger. ...

High pressure fuel pump

Injection pump for internal combustion engines

An injection pump for an internal combustion engine, of the type having a pump piston (15) for each cylinder of the engine, the pump pistons being each movable against a respective spring (19) by a plunge tappet (14) driven by a cam. A cam plate (23) abuts against the foot (17) of the piston and the distance between the piston and plunger is variable by the choice of different thickness shim-like pre-stroke plates (24) inserted between the cam plate (23) and plunger tappet (14). Three ramps (25) are provided on the end of the tappet plunger (14), each ramp having a lead-in chamber (26) onto which the cam plate (23) can be pushed by turning of the latter, this movement supporting the cam plate (23) on the ramps (25) and thereby freeing the pre-stroke plate (24), so that it can be exchanged for one of a different thickness. The pump can be brought back into its operating position by turning the cam plate (23) in the opposite direction. ...

Improvements relating to fuel injection pumps for internal combustion engines

... 581,277. Filters. C.A.V., Ltd., BROOK, K., and EVANS, F. M. April 5, 1945, No. 8451. [Class 46] [Also in Group XXVIII] A fuel injection pump has a chamber b at one side of its body a adapted to accommodate a filter consisting of a pack of paper sheets or other laminar elements h and intermediate spacers i. The spacers are of skeleton form provided alternately with inner openings communicating with a duct j and outer openings communicating with the interior of the chamber b.

LIQUID FUEL INJECTION PUMPS

... 1349353 Fuel injection pumps BRYCE BERGER Ltd 15 July 1971 [21 July 1970] 35345/70 Heading F1A In a fuel injection pump in which the delivery is varied by rotating the pumping plunger 10 by means of a sleeve 16 having an axial slot 16 engaging a pin 14 on the plunger, the head 15 of the pin is non-circular and is engaged between the sides of a channel member 11 located within a transverse groove 12 in the plunger.

BEARINGS

... 1449834 Bearings; cam followers CATERPILLAR TRACTOR CO 5 Dec 1973 [11 Dec 1972] 56459/73 Headings F2A and F2K [Also in Divisions F1 and E2] A cam follower comprises a member 27 having a roller 32 rotatably mounted in a recess 31 in an end thereof, and a spring clip 40 mounted on the member and engaging opposite ends of said roller for restraining displacement of the roller along its axis of rotation relative to said member. The leg portions 42, 43 of the spring clip are located in grooves 35, 36 in the member 27. The member 27 may be mounted for axial movement in the housing bore of a fuel injection pump. It is prevented from rotating by a key located in a groove 30.

FUEL PUMPING APPARATUS

FUEL-INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES

Oil seal

Fuel pump assembly

A fuel pump assembly 110 for an internal combustion engine comprises a plunger 114, a plunger bore 132 and a drive arrangement 123 driven by a drive shaft (18, Fig 2). A pumping stroke moves the plunger from a bottom dead centre (BDC) position to a top dead centre (TDC) position to pressurise fuel within a chamber (36, Fig 1). A spring assembly includes a return spring 154 to apply a return force to the plunger for a return stroke. The return spring is cooperable, at first end 62, with first member 150 coupled to the plunger and movable at a first speed dependent on the speed of rotation of the drive shaft and, at second end 64, with second member 70 which is movable at a damped speed relative to the first speed, so that the return spring has a variable stroke length depending on the speed of rotation of the drive shaft. A damper arrangement 80, 82 may act on the second member to set the damped speed. This may include a damper chamber 84 for receiving a fluid which applies a damping force ...

DRIVE DEVICE FUER A FR CUTTING PUMPS OF INTERNAL-COMBUSTION ENGINES

FUEL SYSTEM PLANT IN FORM OF A COMM ON OF RAIL SYSTEM OF AN INTERNAL-COMBUSTION ENGINE WITH SEVERAL CYLINDERS

HIGH-PRESSURE PUMP PISTON CYLINDER UNIT

HIGH-PRESSURE PUMP FOR THE PROMOTION OF FUEL WITH A TORSION-DECOUPLED COMPRESSION SPRING ELEMENT IN THE TAPPET MECHANISM

CAM SHAFT IMPULSE, IN PARTICULAR FOR A DIESEL INJECTION PUMP, WITH A STROKE-MOBILE PROPELLED CASTOR

HOUSING WITH OVERLAPPING PASSAGES

EVER A CYLINDER OF A MULTI-CYLINDER DIESEL ENGINE ALLOCATION INJECTION AGGREGATE

INJECTION AGGREGATE FOR MULTI-CYLINDER DIESEL ENGINES

PISTON INJECTION PUMP FOR FUEL PROMOTION FOR INTERNAL-COMBUSTION ENGINES

FUEL INJECTION PUMP FUER BRENNKRAFTMSCHINEN FUER A HIGH INJECTION PRESSURE

MANUFACTURING PROCESS

HOCHDRUCKPUMPENANORDNUNG ZUM PUMPEN VON BRENNKRAFTSTOFF AUS EINEM TANK IN EINEN HOCHDRUCKBEHÄLTER

In a high-pressure pump arrangement for pumping combustible fuel from a tank into a high-pressure container, wherein at least one pump element consisting of pump cylinder and pump piston is provided whose pump chamber can be connected via a suction valve to a pump suction chamber supplied by a fuel supply and via a pressure valve to the high-pressure container, wherein the pump element comprises a leakage line for returning into the pump suction chamber leakage fuel which flows off between pump piston and pump cylinder, and wherein the fuel supply has a metering unit, and at least one purging line, having a throttle, for evacuating a purging quantity coming from the metering unit into a low-pressure region leads off from the fuel supply downstream of the metering unit, the at least one purging line (24, 24') is connected to the pump suction chamber (12) such that the purging quantity flows through the pump suction chamber (12).

FUEL PIPE CONNECTION FOR FUEL INJECTION PUMPS

FUEL INJECTION PUMP FUER INTERNAL-COMBUSTION ENGINES.

KRAFTSTOFFEINSPRITZPUMPE FUER BRENNKRAFTMASCHINEN, INSBESONDERE DIESELMOTOREN

FUEL INJECTION PUMP.

ELECTRICALLY STEERED PUMPEDUESE FUER THE FUEL INJECTION WITH DIESEL INTERNAL-COMBUSTION ENGINES.

HIGH PRESSURE PISTON CYLINDER UNIT

INJECTION PUMP UNIT WITH CONTROL AND PROCEDURE FOR THEIR ADJUSTING

KRAFTSTOFFEINSPRITZPUMPE FUER BRENNKRAFTMASCHINEN

COMPACT FUEL SYSTEM OF HIGH ACHIEVEMENT WITH MEMORY

COMMON RAIL KRAFTSTOFFVERSORGUNGSEINRICHTUNG FOR DIESEL INTERNAL-COMBUSTION ENGINES

Interference-safe attack for the delivery adjusting link of fuel injection pumps for internal-combustion engines

FUEL INJECTION PUMP

DEVICE FOR SUPPLYING FUEL TO A COMBUSTION ENGINE

A device for delivering fuel to at least one atomizer of a combustion engine which includes a fuel pump having a pump chamber bounded by a displacer body defining a displacement volume, with driving means for reciprocating the displacer body. An actuating means adjusts the displacement volume and includes a barometer housing, a moveable member bounding a pressure chamber in the housing and a valve communicating the pressure chamber with an air inlet manifold for the engine. The moveable member may comprise a barometer bellows with an internal pressure substantially lower than atmospheric and may cooperate with biasing spring members. Connection between the pressure chamber and the air inlet manifold may include a valve affected by exhaust gas composition or engine temperature.

TORQUE SPRING ADJUSTMENT MECHANISM

TAMPER-RESISTANT SEAL FOR A FUEL INJECTION PUMP

Pulsation damper

A pulsation damper mounted in a fuel chamber ( 23 ) of a high-pressure fuel pump ( 20 ) is provided with a diaphragm ( 11 ) having a flat section ( 11 a ) displaced when fuel pressure is applied thereto, a pump cover ( 10 ) for supporting the diaphragm ( 11 ), and a gas chamber ( 12 ) formed by the diaphragm ( 11 ) and the pump cover ( 10 ). Pressure pulsation occurring in the fuel chamber ( 23 ) is suppressed by displacement of the flat section ( 11 a ). The diaphragm ( 11 ) is formed in a closed-bottomed tubular shape with the flat section ( 11 a ) located at the bottom and has a projection ( 11 b ) provided to the periphery of the flat section ( 11 a ) and projecting to the side opposite to the pump cover ( 10 ). A tubular peripheral section extending from the outer periphery of the projection ( 11 b ) so as to be vertical to the flat section ( 11 a ) is fitted over the pump cover ( 10 ). The externally fitting portion of the tubular peripheral section is a joint section ( 11 c ) joined to the pump cover ( 10 ).

FUEL INJECTION PUMP HAVING A SEPARABLE PLUNGER

A fuel injection pump having a separable plunger includes a separable plunger of which outer circumference is slide coupled to an inside of the a such that a lower portion thereof is supported by an upper portion of a main plunger to enable upward and downward slide movement in association with the main plunger, wherein an injection timing control spiral step of which upper surface is formed in a spiral shape, is protrudingly formed on the outer circumference thereof and a fuel passage is formed on one side of the outer circumference thereof including the injection timing control spiral step and an elastic member having a lower portion elastically supported by the separable plunger and an upper portion inserted within the barrel to be supported by an upper surface of the barrel. 1. A fuel injection pump having a separable plunger , wherein a barrel is installed within a main pump casing , a main plunger of which lower portion is protruded in a downward direction of the barrel is slide coupled to an inside of the barrel , and a main fuel outlet is formed on the main pump casing and the barrel to be connected to each other , so that the main plunger is slide moved upward and downward along the barrel to compress fuel introduced within the barrel through a main fuel input hole and a main fuel relief plug to be provided to a fuel injection hole through the main fuel outlet , the fuel injection pump comprising:a separable plunger of which outer circumference is slide coupled to an inside of the barrel such that a lower portion thereof is supported by an upper portion of the main plunger to enable upward and downward slide movement in association with the main plunger, wherein an injection timing control spiral step of which upper surface is formed in a spiral shape is protrudingly formed on the outer circumference thereof and a fuel passage is formed on one side of the outer circumference thereof including the injection timing control spiral step; andan elastic member ...

Metallic component for high-pressure applications

A metallic component ( 1 ) for high-pressure applications, which serves in particular for fuel injection systems of air-compressing, self-igniting internal combustion engines, comprises at least one transition region ( 2 ). The transition region ( 2 ) is re-worked here after a hardening operation. The re-working is performed by electrochemical removal and mechanical removal, in particular honing.

FUEL ACCUMULATOR BLOCK FOR TESTING HIGH-PRESSURE COMPONENTS OF FUEL INJECTION SYSTEMS

A fuel accumulator block is provided for testing high-pressure components of fuel injection devices. The fuel accumulator block includes an accumulator body and at least one pressure control valve, which is accommodated in a receptacle in the accumulator body. The accumulator body is connected to a test line for a test medium and to a cooling line for a cooling medium. Within the accumulator body a test line run is developed for the test medium and a cooling line run is developed for the cooling medium. The cooling line run has at least one section which runs in the vicinity of the receptacle for the pressure control valve. 111-. (canceled)12. A fuel accumulator block , comprising:an accumulator body having a receptacle, the accumulator body being connected to a test line for a test medium and to a cooling line for a cooling medium;a pressure control valve situated in the receptacle of the accumulator body; anda test line run for the test medium and a cooling line run for the cooling medium developed within the accumulator body, wherein the cooling line run has at least one section which runs in a vicinity of the receptacle for the pressure control valve.13. The fuel accumulator block as recited in claim 12 , wherein the fuel accumulator block is a test rail for testing high pressure components of a fuel injector device.14. The fuel accumulator block as recited in claim 12 , wherein the section at least partially surrounds the receptacle.15. The fuel accumulator block as recited in claim 12 , wherein the section surrounds the receptacle in a meandering shape.16. The fuel accumulator block as recited in claim 12 , wherein the section surrounds the receptacle in an annular shape.17. The fuel accumulator block as recited in claim 12 , wherein a plurality of receptacles are provided in the accumulator body for accommodating a plurality of pressure control valves claim 12 , and the section runs in at least one plane between two adjacent ones of the plurality of the ...

TANK ARRANGEMENT HAVING A MECHANICAL PRESSURE REGULATOR, AND VEHICLE

The invention relates to a tank arrangement (), comprising a fuel tank () comprising at least one fuel chamber (), a tank installation unit () arranged in the fuel tank (), a fuel pump element () arranged in the installation unit () and designed to make fuel () available from the tank arrangement () to a fuel user (), a pump unit () arranged in the fuel chamber () and operatively connected to the fuel pump element () and designed to convey fuel () out of the fuel chamber () into the tank installation unit (), and a pressure regulating element (), functionally arranged between fuel pump element () and pump unit (). The arrangement is characterised in that the pressure regulating element () is designed as a mechanical pressure regulator. 12. A tank arrangement () , having{'b': 4', '6', '6, 'i': 'a, b', 'a fuel tank (), having at least one fuel chamber (, );'}{'b': 8', '4, 'a tank installation unit (), arranged in the fuel tank ();'}{'b': 10', '8', '12', '2', '14, 'a fuel pump element (), arranged in the tank installation unit () and set up to provide fuel () from the tank arrangement () to a fuel consumer ();'}{'b': 16', '16', '6', '6', '10', '12', '6', '6', '8, 'i': a, b', 'a, b', 'a, b, 'a pump unit (, ), arranged in the fuel chamber (, ), operatively connected to the fuel pump element () and set up to deliver fuel () from the fuel chamber (, ) into the tank installation unit (); and'}{'b': 18', '10', '16', '16, 'i': 'a, b', 'a pressure regulating element (), functionally arranged between the fuel pump element () and the pump unit (, );'}characterized in that{'b': '18', 'the pressure regulating element () is configured as a mechanical pressure regulator.'}221420181014. The tank arrangement as claimed in claim 1 , the tank arrangement () being connectable to the fuel consumer () with the use of a line system () claim 1 , and the pressure regulating element () being set up to maintain a required system pressure between the fuel pump element () and the fuel consumer ...

High-pressure pump

A high-pressure pump includes a plunger capable of reciprocating, and a housing having a pressurizing chamber in which fuel is pressurized by the plunger, and a fuel chamber through which the fuel flows toward and from the pressurizing chamber. The pump includes a spring that biases the plunger so as to increase the volume of the pressurizing chamber, and a spring seat that is fixed to the housing and is in contact with one end of the spring. A first space that communicates with the fuel chamber via a fuel passage is provided between the bottom of the spring seat and the housing, and a top face of the bottom exposed to the first space is covered with a heating insulating member.

Pump Unit for a High-Pressure Pump

A pump unit includes a pump housing having a low-pressure inlet and a high-pressure outlet. A working medium is fed via the low-pressure inlet to a working chamber formed in the pump housing. The working medium is discharged from the working chamber via the high-pressure outlet. The pump unit also includes a pump piston channel formed in the pump housing and having a longitudinal axis. The pump unit has a first pump piston arranged movably along the longitudinal axis in the pump piston channel and coupled hydraulically to the working chamber. The pump unit also has a second pump piston arranged movably along the longitudinal axis in the pump piston channel and coupled hydraulically via a compensation volume to the first pump piston, wherein the compensation volume is coupled hydraulically to a compensation unit configured to adapt the compensation volume based on a pressure in the working chamber.

Mechanism for Restraining Fuel Pressure Pulsation and High Pressure Fuel Supply Pump of Internal Combustion Engine with Such Mechanism

A high pressure fuel pump includes a pump housing, pressure and damper chambers, a metal diaphragm, a press-fitted portion, and a weld portion. The pressure chamber is provided in the pump housing. The damper chamber is formed by the pump housing and a damper cover. The metal diaphragm damper is arranged in the damper chamber. At the press-fitted portion, an annular surface of the damper cover is press fitted to an annular surface of the pump housing. The weld portion fixes the damper cover to the pump housing at an entire circumference of the press-fitted portion. 1. A high pressure fuel pump comprising:a pump housing;a pressure chamber provided in the pump housing;a damper chamber formed by the pump housing and a damper cover;a metal diaphragm damper arranged in the damper chamber;a press-fitted portion at which an annular surface of the damper cover is press-fitted to an annular surface of the pump housing; andan weld portion fixing the damper cover to the pump housing at an entire circumference of the press-fitted portion.2. The high pressure fuel pump according to claim 1 , further comprising:a pair of an upper holding member and a lower holding member vertically sandwiching the metal diaphragm damper.3. The high pressure fuel pump according to claim 2 , wherein the upper holding member is in contact with the damper cover claim 2 , and the lower holding member is in contact with the pump housing.4. The high pressure fuel pump according to claim 1 , wherein the annular surface of the damper cover is formed in an open side of the damper cover.5. The high pressure fuel pump according to claim 4 , wherein the weld portion penetrates through the damper cover to the pump housing at an entire circumference of the press-fitted portion.6. The high pressure fuel pump according to claim 4 , wherein an open side end part of the annular surface of the damper cover is not in contact with an upper surface of the pump housing.7. The high pressure fuel pump according to claim 5 ...

INTEGRATED TAPPET ASSEMBLY

A tappet assembly () used in mechanical equipment includes a tappet body () having a cylindrical shape and including a lower carrier portion () and an upper shell portion () having a cavity () defined by an inner wall () of the upper shell portion () and a top surface () of the lower carrier portion (). The lower carrier portion () and the upper shell portion () are integrally formed as a single-piece unit. A post () extends upwardly from the top surface () of the lower carrier portion () and is configured to reduce a peak contact pressure associated with the tappet body (). 1100. A tappet assembly () used in mechanical equipment , comprising:{'b': 108', '152', '158', '150', '160', '158', '154', '152', '152', '158, 'a tappet body () having a cylindrical shape and including a lower carrier portion () and an upper shell portion () having a cavity () defined by an inner wall () of the upper shell portion () and a top surface () of the lower carrier portion (), the lower carrier portion () and the upper shell portion () being integrally formed as a single-piece unit; and'}{'b': 162', '154', '152', '108, 'a post () extending upwardly from the top surface () of the lower carrier portion () and being configured to reduce a peak contact pressure associated with the tappet body ().'}2152. The tappet assembly of claim 1 , wherein the lower carrier portion () has a substantially solid body.3162154152. The tappet assembly of claim 1 , wherein the post () is positioned substantially at a center of the top surface () of the lower carrier portion ().4162. The tappet assembly of claim 1 , wherein the post () is a cylindrical column.5164166108. The tappet assembly of claim 1 , wherein a lubricant feed groove () is disposed on an outer wall () of the tappet body () and is configured to receive a lubricant.6. The tappet assembly of claim 5 , wherein the lubricant is an oil or a fuel.7164158152. The tappet assembly of claim 5 , wherein the lubricant feed groove () continuously extends ...

Plunger Fuel Pump for an Internal Combustion Engine

A plunger fuel pump for an internal combustion engine includes a pump cylinder and a pump plunger that is axially displaceable in the pump cylinder. The plunger fuel pump has a seal with an annular basic structure arranged around the circumference of the pump plunger. The seal is produced by injection molding in an axial injection direction. 1. A piston fuel pump for an internal combustion engine , the piston fuel pump comprising:a pump cylinder;a pump piston configured to be displaced axially in the pump cylinder; anda seal having an annular basic structure,wherein the seal is arranged on a circumference of the pump piston, andwherein the seal is produced by injection molding with an axial injection direction.2. The piston fuel pump as claimed in claim 1 , wherein:the seal has at least one injection point and at least one venting point, andthe at least one injection point and the at least one venting point are arranged offset with respect to one another in an axial direction.3. The piston fuel pump as claimed in claim 2 , wherein the at least one injection point and the at least one venting point are arranged offset with respect to one another in a circumferential direction.4. The piston fuel pump as claimed in claim 1 , wherein:a plurality of injection points are provided on a first axial side of the seal,at least one venting point is provided on a second axial side of the seal between injection points of the plurality of injection points in a circumferential direction, andthe first axial side of the seal is opposite the second axial side of the seal.5. The piston fuel pump as claimed in claim 1 , wherein:a plurality of injection points are provided on a first axial side of the seal,a plurality of venting points are provided on a second axial side of the seal,each venting point of the plurality of venting points is offset in a circumferential direction with respect to each injection point of the plurality of injection points, andthe first axial side of the seal is ...

Piston Fuel Pump for an Internal Combustion Engine

A piston fuel pump for an internal combustion engine includes a pump cylinder and a pump piston, which can be axially displaced in the pump cylinder. The piston fuel pump also includes a seal which is arranged on the periphery of the pump piston. The seal has at least one bump pointing in the axial direction, and the seal axially covers the at least one bump. 1. A piston fuel pump for an internal combustion engine , the piston fuel pump comprising:a pump cylinder;a pump piston configured to be displaced axially in the pump cylinder; anda seal arranged on a circumference of the pump piston,wherein the seal has at least one bump which points in an axial direction.2. The piston fuel pump as claimed in claim 1 , wherein the seal is configured to bear axially via the at least one bump.3. The piston fuel pump as claimed in claim 1 , wherein the seal is prestressed axially via the at least one bump.4. The piston fuel pump as claimed in claim 1 , wherein the at least one bump is a plurality of bumps which point in the same axial direction.5. The piston fuel pump as claimed in claim 4 , wherein:the seal has an annular basic structure,the plurality of bumps includes a number of bumps, andthe number of bumps are spaced apart from one another by an angle of 360° divided by the number of bumps.6. The piston fuel pump as claimed in claim 1 , wherein the at least one bump has a round base area.7. The piston fuel pump as claimed in claim 1 , wherein the at least one bump is integrally formed on the seal.8. The piston fuel pump as claimed in claim 1 , wherein:in an unstressed state, the at least one bump has an extent in the axial direction of between 3% and 20% of an axial extent of the seal.9. The piston fuel pump as claimed in claim 1 , wherein:the seal bears via the at least one bump against a cap, which is pushed onto the pump piston.10. The piston fuel pump as claimed in claim 9 , wherein the cap is pressed radially on the pump piston.11. The piston fuel pump as claimed in ...

Piston Fuel Pump for an Internal Combustion Engine

A piston fuel pump for an internal combustion engine includes a pump cylinder, a pump piston, a seal, and a cover. The pump piston is axially displaceable in the pump cylinder. The seal is arranged on a periphery of the pump piston. The cover is placed on the piston pump to axially maintain a position of the seal, in particular via an axial bias. 1. A piston fuel pump for an internal combustion engine comprising:a pump cylinder;a pump piston disposed in the pump cylinder so as to be axially displaceable,a seal disposed on a circumference of the pump piston; anda cover pushed onto the pump piston to axially hold the seal.2. The piston fuel pump as claimed in claim 1 , wherein the cap defines a sleeve shape.3. The piston fuel pump as claimed in claim 1 , wherein the cap defines a cup shape.4. The piston fuel pump as claimed in claim 3 , wherein the cap defines an open end claim 3 , the open end being pushed onto the pump piston.5. The piston fuel pump as claimed in claim 4 , wherein the cap is pushed onto the piston pump piston such that a bottom section of the cap bears on the pump piston.6. The piston fuel pump as claimed in claim 1 , wherein the cap is pressed radially on the pump piston.7. The piston fuel pump as claimed in claim 1 , wherein the cap bears without a gap against the pump piston.8. The piston fuel pump as claimed in claim 1 , wherein the cap consists of steel.9. The piston fuel pump as claimed in claim 1 , wherein the cap is a deep-drawn part.10. The piston fuel pump as claimed in claim 1 , wherein:the pump piston defines a shoulder; andthe cap holds the seal axially, between the cap and the shoulder of the pump piston.11. The piston fuel pump as claimed in claim 1 , further comprising:a holding element fixed on the pump piston, wherein the cap holds the seal axially, between the cap and the holding element.12. The piston fuel pump as claimed in claim 1 , wherein the seal includes a fiber-reinforced thermoplastic material.13. The piston fuel pump as ...

HIGH-PRESSURE PUMP AND METHOD FOR MANUFACTURING SAME

A plunger of a high-pressure pump is provided reciprocatably on an inner side of a cylinder. A holder disposed on an opposite side of the cylinder from a pressurizing chamber includes a large tubular portion that provides a predetermined space between the large tubular portion and an outer wall of the plunger, and a small tubular portion that is disposed on an opposite side of the large tubular portion from the cylinder. A pin inserted into a hole of the plunger at a position corresponding to the large tubular portion protrudes radially outward from the outer wall of the plunger and is accommodated in a space on an inner side of the large tubular portion. 1. A high-pressure pump comprising:a cylinder;a pump body that includes a pressurizing chamber provided in an end portion of the cylinder;a plunger that is disposed reciprocatably on an inner side of the cylinder and is capable of changing a volume of the pressurizing chamber;a cylindrical member that is disposed coaxially with the cylinder on an opposite side of the cylinder from the pressurizing chamber, and the cylindrical member including a large tubular portion which defines a predetermined space between the large tubular portion and an outer wall of the plunger, and a small tubular portion having an inner diameter smaller than an inner diameter of the large tubular portion and being located on an opposite side of the large tubular portion from the cylinder; anda locking member protruding radially outward from the outer wall of the plunger at a position corresponding to the large tubular portion of the cylindrical member, the locking member being accommodated in the space on an inner side of the large tubular portion.2. The high-pressure pump according to claim 1 , whereinthe cylinder and the pump body are integrated together, andthe pump body closes an opposite side of the pressurizing chamber from the plunger.3. The high-pressure pump according to claim 1 , whereinthe locking member is capable of being ...

HIGH-PRESSURE PUMP AND PRODUCTION METHOD THEREOF

A pump body of a high-pressure pump includes a pressure chamber formed in a deep portion of a cylinder. The pump body closes the pressure chamber on a side opposite to a plunger. The plunger reciprocates within the cylinder to vary a volume of the pressure chamber. The large-diameter portion provided at an end of the plunger on a side protruding to the pressure chamber has an outside diameter larger than an inside diameter of the cylinder and smaller than an inside diameter of the pressure chamber. In this case, the large-diameter portion is engaged with a step portion between the cylinder and the pressure chamber in a state before attachment of the high-pressure pump to an internal combustion engine. Accordingly, separation of the plunger from the cylinder is avoidable. 1. A high-pressure pump comprising:a cylinder;a pump body including a pressure chamber having a larger inside diameter than an inside diameter of the cylinder, the pressure chamber being disposed in a deep portion of the cylinder, the pump body closing the pressure chamber on a side opposite to the cylinder;a plunger that reciprocates within the cylinder to vary a volume of the pressure chamber; anda large-diameter portion having an outside diameter larger than the inside diameter of the cylinder, and smaller than the inside diameter of the pressure chamber, the large-diameter portion being provided at an end of the plunger on a side protruding to the pressure chamber.2. The high-pressure pump according to claim 1 , wherein claim 1 ,as a result of at least either “heating the cylinder” or “cooling the large-diameter portion”, the cylinder and the large-diameter portion has a relationship such thatthe inside diameter of the cylinder is larger than the outside diameter of the large-diameter portion, orthe outside diameter of the large-diameter portion is smaller than the inside diameter of the cylinder.3. The high-pressure pump according to claim 1 , wherein:the cylinder and the pump body are formed ...

INTERNAL COMBUSTION ENGINE EXHAUST PURIFICATION DEVICE

An internal combustion engine exhaust purification device includes a filter which is disposed in an exhaust path and collects particulate matter in exhaust gas, an injection valve which is disposed upstream of the filter in the exhaust path and injects fuel into the exhaust path, a fuel pump which supplies a fuel to the injection valve, a shut-off valve which is interposed between the fuel pump and the injection valve, and selectively shuts off a fuel supply from the fuel pump to the injection valve, and a control unit which controls the injection valve and the shut-off valve. The control unit closes the shut-off valve when the control unit detects an opened adherence failure of the injection valve and detects an abnormal temperature rise of the filter during regeneration of the filter. 1. An internal combustion engine exhaust purification device , comprising:a filter that is provided in an exhaust path, and collects particulate matter in exhaust gas;an injection valve that is provided upstream of the filter in the exhaust path, and injects a fuel into the exhaust path;a fuel pump that supplies a fuel to the injection valve;a shut-off valve that is interposed between the fuel pump and the injection valve, and selectively shuts off a fuel supply from the fuel pump to the injection valve; anda control unit configured to control the injection valve and the shut-off valve,wherein the control unit closes the shut-off valve when the control unit detects an opened adherence failure of the injection valve and detects an abnormal temperature rise of the filter during regeneration of the filter.2. The internal combustion engine exhaust purification device according to claim 1 ,wherein the control unit opens the shut-off valve when the control unit does not detect the opened adherence failure of the injection valve or does not detect the abnormal temperature rise of the filter during the regeneration of the filter.3. The internal combustion engine exhaust purification device ...

HIGH PRESSURE FUEL PUMP

A high pressure fuel pump according to the present invention includes a cylinder which is fitted in a concave portion formed in a pump housing and which defines a compression chamber of the pump and a plunger which pressurizes, by sliding against the cylinder, the fluid in the compression chamber. The high pressure fuel pump is structured such that the fluid sucked into the compression chamber by reciprocating motion of the plunger is pressurized and is then discharged from the compression chamber. 110-. (canceled)11. A high-pressure fuel supply pump comprising:a cylinder having a ceiling portion and a cylindrical portion;a plunger sliding with a sliding portion formed on an inner peripheral surface of the cylindrical portion;a pump housing having an insertion hole through which the cylinder is inserted,the cylinder has a through hole formed in the cylindrical portion, and is press-fitted in the insertion hole so that the ceiling portion is a downstream side in a press-fitting direction,whereinthe cylinder has a first press-fitting portion formed on an outer peripheral surface of the ceiling portion in contact with an inner peripheral surface of the insertion hole and a second press-fitting portion formed on an outer peripheral surface of the cylindrical portion in contact with the inner peripheral surface of the insertion hole,the second press-fitting portion is located closer to the through hole than an opening end of the cylinder into which the plunger is inserted, anda radial gap between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the insertion hole is provided on an upstream side in the press-fitting direction from the second press-fitting portion.12. The high-pressure fuel supply pump according to claim 11 ,wherein the cylinder has an enlarged portion having an inner diameter larger than the sliding portion, the enlarged portion formed between the sliding portion and the ceiling portion.13. The high-pressure fuel ...

Pulsation damper and high-pressure pump having the same

A pulsation dumper configured to reduce a fuel pressure pulsation of fuel flowing in a fuel chamber includes a sealed space in which gas having a predetermined pressure is encapsulated between a first diaphragm and a second diaphragm configured to be resiliently deformable by a fuel pressure pulsation in the fuel chamber. A first resilient member provided in the sealed space abuts against an inner wall of the first diaphragm, and a second resilient member abuts against an inner wall of a second diaphragm. A supporting member provided between the first resilient member and the second resilient member supports an outer peripheral portion of the first resilient member and an outer peripheral portion of the second resilient member. A resonance of first and second diaphragms is restrained by the first and second resilient members. The first and second resilient members do not impair deformation of center portions of the first and second diaphragms.

Plunger assembly

A plunger assembly for a high pressure fuel pump head, wherein an axial internal drilling provided in a first plunger section, and a clearance between the first and a second plunger section, are exposed to a pumping fuel pressure, and wherein a pressure gradient along an outside wall of the first section and the bore, and pressure within the drilling and clearance, results in an increasing deformation of the first section and thereby a decreasing clearance between the first section and the bore, moving towards the second section, thereby providing sealing from one end of the plunger to the opposite end.

INTERNAL COMBUSTION ENGINE

An internal combustion engine includes an intake camshaft, a vacuum pump, an oil pump, and an oil feeding passage serving as an oil supplying path. The vacuum pump includes a rotor and a housing. The vacuum pump is formed with a negative pressure chamber that generates a negative pressure, and an oil path connected to the negative pressure chamber. An atmosphere communication hole for supplying air to the negative pressure chamber through the oil feeding passage and the oil path when the vacuum pump is stopped is arranged in the oil feeding passage. The atmosphere communication hole communicates the negative pressure chamber and the atmosphere before an amount of oil in the housing exceeds an allowable oil amount when the vacuum pump is stopped. 1. An internal combustion engine comprising:a camshaft;a vacuum pump including a rotor and a housing that accommodates the rotor, the rotor being coupled to the camshaft to integrally rotate with the camshaft, the housing rotatably supporting the rotor, the vacuum pump interiorly including a negative pressure chamber defined by the rotor and the housing and an oil path connected to the negative pressure chamber, and a negative pressure being generated in the negative pressure chamber by rotation of the rotor;an oil pump; andan oil supplying path that is connected to the oil pump, and that supplies oil to the oil path; whereinthe oil supplying path includes an atmosphere communication hole that supplies air to the negative pressure chamber through the oil supplying path and the oil path when the vacuum pump is stopped; andthe atmosphere communication hole communicates the negative pressure chamber and the atmosphere before an amount of oil in the housing exceeds an allowable oil amount when the vacuum pump is stopped.2. The internal combustion engine according to claim 1 , whereinthe oil supplying path includes a merging path connected to the oil path, and a plurality of branched paths branched and extended from the merging ...

CYLINDER HEAD BLANK, CYLINDER HEAD AND HIGH-PRESSURE PUMP FOR FUEL INJECTION SYSTEMS

The invention relates to a cylinder head blank () for a high-pressure pump (), which is in particular configured as a radial or in-line piston pump for fuel injection systems of air-compressing, auto-ignition internal combustion engines, comprising a base () having a high-pressure outlet () and a plurality of low-pressure connecting points (-). Here, the plurality of low-pressure connecting points (-) are closed in a raw state, wherein a low-pressure connection () can be fitted to each of the low-pressure connecting points (). The invention further relates to a cylinder head for a high-pressure pump () and to a high-pressure pump (). 19110161315131511. A cylinder head blank () for a high-pressure pump () , comprising a base () on which a high-pressure outlet () and a plurality of low-pressure connecting points (-) are closed in a raw state , and each of the low-pressure connecting points (-) being configured to have fitted thereto a low-pressure connection ().29. The cylinder head blank () according to claim 1 ,characterized in that{'b': 13', '15', '17', '22', '23', '10, 'at least one of the low-pressure connecting points (-) is closed in the raw state by an outer wall (, , ) of the base ().'}3. The cylinder head blank according to claim 1 ,characterized in that{'b': 13', '14', '15', '13', '14', '15', '10, 'at least one of the low-pressure connecting points (, , ) is provided on a radial projection (′, ′, ′) of the base ().'}4. The cylinder head blank according to claim 1 ,characterized in that{'b': 18', '19', '10, 'at least one mounting bracket (, ) is integrally formed onto the base ().'}5. The cylinder head blank according to claim 4 ,characterized in that{'b': 16', '13', '15', '18', '19', '10', '31', '38', '30, 'the high-pressure outlet (), the plurality of low-pressure connections (-) and the at least one mounting bracket (, ) are disposed so as to be distributed around the perimeter of the base () at least approximately at angular positions (-) which are ...

FLUID PUMP

A fluid pump includes an inlet for introducing fluid into the fluid pump; an outlet for discharging the fluid from the fluid pump; a motor having an armature which rotates about an axis such that the armature is supported at one end by a first bearing and at second end by a second bearing, the motor also having a stator which circumferentially surrounds the armature such that a fluid passage is defined radially between the armature and stator through which the fluid flows from the inlet to the outlet; a pumping arrangement which is rotated by the armature and which pumps the fluid from the inlet to the outlet; a flow impedance member extending axially in the fluid passage which impedes circumferential flow of the fluid within the fluid passage, thereby generating a pressure gradient circumferentially within the fluid passage which applies a lateral force to the armature. 1. A fluid pump comprising:an inlet for introducing fluid into said fluid pump;an outlet for discharging said fluid from said fluid pump;a motor having an armature which rotates about an axis such that said armature is supported at one end by a first bearing and at second end by a second bearing, said motor also having a stator which circumferentially surrounds said armature such that a fluid passage is defined radially between said armature and said stator through which said fluid flows from said inlet to said outlet;a pumping arrangement which is rotated by said armature and which pumps said fluid from said inlet to said outlet;a flow impedance member extending axially in said fluid passage which impedes circumferential flow of said fluid within said fluid passage, thereby generating a pressure gradient circumferentially within said fluid passage which applies a lateral force to said armature.2. A fluid pump as in wherein said flow impedance member is configured to apply said lateral force in a direction which is opposite in direction to a side load applied to said armature by said pumping ...

HIGH PRESSURE PUMP

A high pressure pump is provided to be used in a fuel feeding system for a vehicle engine and receive a fuel primarily pressurized by a low pressure pump, and secondarily compresses the fuel to increase the pressure of the fuel for supplying the fuel to a fuel injector. The high pressure pump includes a pump body and a camshaft that is rotatably installed in the pump body to be rotated using torque transmitted from an exterior of the pump body. Additionally, a roller bearing rotatably supports the camshaft in the pump body and an inlet port is disposed on the pump body to introduce a primarily pressurized fluid into the pump body. An orifice is configured to supply the fluid to the roller bearing while reducing a pressure of the fluid introduced via the inlet port. 1. A high pressure pump , comprising:a pump body;a camshaft rotatably installed in the pump body to be rotated using torque transmitted from an exterior of the pump body;a roller bearing rotatably supporting the camshaft in the pump body;an inlet port disposed on the pump body to introduce a primarily pressurized fluid into the pump body; andan orifice configured to supply the fluid to the roller bearing while reducing a pressure of the fluid introduced via the inlet port.2. The high pressure pump of claim 1 , wherein an outlet port is disposed on the pump body to discharge the fluid that passes through the roller bearing from the orifice; and an outlet conduit extends from the roller bearing to the outlet port and functions as a flowing conduit of the fluid claim 1 , the outlet conduit being configured to change a direction thereof multiple times at a location around the roller bearing claim 1 , to cool the high pressure pump.3. The high pressure pump of claim 2 , wherein the inlet port and the outlet port are disposed at opposite positions based on the camshaft to face each other; and the inlet conduit and the outlet conduit are arranged symmetrically based on the roller bearing claim 2 , in which the ...

High-Pressure Pump, in Particular Plug-In Pump, for a Fuel System for an Internal Combustion Engine

A high-pressure pump, in particular a plug-in pump, for a fuel system of an internal combustion engine includes a housing, and a flange that is rigidly arranged on the housing. The flange is formed from at least two parts. The pump defines a groove-shaped receiving area, and a radially inward region of the flange part is received in the receiving area. The at least two parts of the flange are held on the housing via at least one of a caulked joint and a press connection.

SYSTEM AND METHOD FOR REDUCING VAPOR GENERATION IN LIQUEFIED NATURAL GAS FUELED VEHICLE

A method of reducing vapor generation in an LNG fueled vehicle is provided. The LNG fueled vehicle includes an LNG fuel system including an external LNG pump. The method includes a step of predicting if the LNG fueled vehicle will be operated during a first forthcoming time period using a controller. If the LNG fueled vehicle will be operated during the first forthcoming time period, as determined by the first predicting step, the method includes cooling the external LNG pump. 1. A method of reducing vapor generation in a liquefied natural gas (LNG) fueled vehicle , the LNG fueled vehicle including an LNG fuel system including an external LNG pump , the method comprising steps of:predicting if the LNG fueled vehicle will be operated during a forthcoming time period using a controller; andif the LNG fueled vehicle will be operated during the forthcoming time period, as determined by the predicting step, cooling the external LNG pump.2. The method of claim 1 , further including:determining whether an LNG transfer pump of the LNG fuel system is currently running; andperforming the predicting step only if the LNG transfer pump is not currently running.3. The method of claim 2 , wherein the predicting step includes evaluating claim 2 , by the controller claim 2 , at least one of operator cab occupancy and a dispatch schedule.4. The method of claim 2 , wherein the forthcoming time period is between about fifteen minutes and about forty-five minutes.5. The method of claim 1 , further including:determining whether an LNG transfer pump of the LNG fuel system is currently running; andperforming the predicting step only if the LNG transfer pump is currently running.6. The method of claim 5 , wherein the predicting step includes evaluating claim 5 , by the controller claim 5 , at least one of operator cab occupancy claim 5 , geographic location claim 5 , and input from a positive train control system.7. The method of claim 6 , wherein the forthcoming time period is between ...

FUEL PUMP MOUNTING

Methods and systems are provided for mounting a fuel pump to a cylinder head of an engine. In one example, a mounting system may comprise: an engine fuel pump mounted directly to a cylinder head cap positioned underneath a cam cover, the cap including a raised portion having a first and a second cap mounting boss, and a main opening for directly receiving the fuel pump, wherein each of the first and second cap mounting bosses couple to a flange formed on a bottom portion of the fuel pump. In this way, the fuel pump may be directly mounted to the cylinder head cap to simplify assembly, minimize fuel leakage and reduce pump vibration. 1. A mounting system comprising:an engine fuel pump mounted directly to a cylinder head cap positioned underneath a cam cover, the cap including a raised portion having a first and a second cap mounting boss, and a main opening for directly receiving the fuel pump, wherein each of the first and second cap mounting bosses couple to a flange formed on a bottom portion of the fuel pump.2. The mounting system of claim 1 , wherein the flange of the fuel pump forms a compression seal against the cap.3. The mounting system of claim 1 , wherein the cam cover includes a recessed groove and compression tabs claim 1 , each compression tab having a height that controls compression of a press-in-place gasket mounted to the recessed groove.4. The mounting system of claim 1 , wherein a sealing gasket is positioned in a recessed slot formed on a lower portion of the cap adjacent to the raised portion.5. The mounting system of claim 1 , wherein a first clearance is formed between the cam cover and the raised portion of the cylinder head cap.6. The mounting system of claim 1 , wherein a second clearance is formed between the cam cover and a lower portion of the cylinder head cap.7. The mounting system of claim 1 , wherein each of the first and second cap mounting bosses are cylindrically shaped annular portions having openings.8. The mounting system of ...

FUEL INJECTION SYSTEM AND CONTROLLER FOR FUEL INJECTION SYSTEM

A fuel pump includes a camshaft that rotates in accordance with operation of an engine and a tappet provided in contact the camshaft. An ECU includes an angle determination unit configured to determine whether a rotation angle from a start of rotation of the camshaft when starting the engine is under a predetermined angle required for forming an oil film on a sliding portion of the tappet, and a control unit configured to, when the rotation angle from the start of rotation of the camshaft is determined to be under the predetermined angle, execute a limit process including at least one of limiting a fuel discharge pressure of the fuel pump or limiting a rotation of the camshaft. 1. A controller for a fuel injection system including a fuel pump having a camshaft that rotates in accordance with operation of an internal combustion engine , a tappet provided in contact with a cam of the camshaft that converts the rotation of the camshaft into linear motion , and a plunger that reciprocates according to the linear motion of the tappet , the fuel pump being configured to suck and discharge fuel according to the reciprocation of the plunger , an accumulator that stores high pressure fuel discharged from the fuel pump , and a fuel injection valve that injects the high pressure fuel stored in the accumulator into a combustion chamber of the internal combustion engine , the controller comprising:an angle determination unit configured to determine whether a rotation angle from a start of rotation of the camshaft when starting the internal combustion engine is under a predetermined angle required for forming an oil film on a sliding portion of the tappet, and when the rotation angle from the start of rotation of the camshaft is determined to be under the predetermined angle, execute a limit process including at least one of limiting a fuel discharge pressure of the fuel pump or limiting a rotation of the camshaft, and', 'when the rotation angle is determined to have exceeded the ...

FUEL SUPPLY DEVICE

A fuel supply device includes a pump unit, a lid unit and a strut linking unit. The pump unit is located on a bottom of a fuel tank for discharging fuel from the fuel tank to an outside thereof. The lid unit is attached to an upper wall of the fuel tank to close an opening formed in the upper wall. The lid unit has a fuel discharge port. The strut linking unit connects the lid unit to the pump unit. The strut linking unit includes an upper-side strut member, which is formed as an independent component from the lid unit. The strut linking unit includes a lower-side strut member, which is movably connected to the upper-side strut member in a vertical direction. The upper-side strut member is connected to the lid unit by a snap-fit connection. A connecting portion between the upper-side strut member and the lid unit has a stress concentration portion, which is preferentially damaged when an external force is applied to the strut linking unit. 1. A fuel supply device for supplying fuel from a fuel tank comprising:a pump unit located on a bottom wall of the fuel tank for pumping out the fuel from an inside of the fuel tank to an outside of the fuel tank;a lid unit attached to an opening formed in an upper-side wall of the fuel tank for closing the opening, wherein a fuel discharge port is formed in the lid unit; an upper-side strut member, which is made of resin and formed as an independent component from the lid unit, and which is connected to the lid unit; and', 'a lower-side strut member, which is movably connected to the upper-side strut member in such a way that the lower-side strut member is movable with respect to the upper-side strut member in a linking direction from the lid unit to the pump unit and in a direction opposite to the linking direction; and, 'a strut linking unit for connecting the lid unit to the pump unit, wherein the strut linking unit includes;'}a stress concentration portion formed in a connecting portion between the lid unit and the upper-side ...

High-Pressure Fuel Supply Pump

To increase a valve-opening pressure at which a pressure relief valve is opened in order to deal with a higher pressure of the fuel, a large pressure relief valve is installed in a high-pressure fuel supply pump. This upsizes the high-pressure fuel supply pump. A pressure relief valve is installed in a discharge joint. This can provide a high-pressure fuel supply pump that is not large too much and sufficiently performs a relief function by efficiently using the excessive space in the pump even when the fuel pressure is increased.

ANTI-ICING IMPELLER SPINNER

An impeller spinner for a fuel pump can include a head and a shank. The head can have a base at one end and a tip at an opposite end. The shank can have a body portion nearest the head with a first diameter and a fastener portion adjacent to the body portion at an end opposite the head with a second diameter. 1. An impeller spinner for a fuel pump , the impeller spinner comprising:a head having a base at one end and a tip at an opposite end; anda shank having a body portion nearest the head with a first diameter and a fastener portion adjacent to the body portion at an end opposite the head with a second diameter.2. The impeller spinner of claim 1 , wherein the head has a conical shape.3. The impeller spinner of claim 2 , wherein the tip of the head is substantially pointed.4. The impeller spinner of claim 1 , wherein the tip of the head is rounded.5. The impeller spinner of claim 1 , wherein a hole extends through the head such that the hole traverses a cross-section of the head at a location between the base and the tip and is configured to accept a pin.6. The impeller spinner of claim 5 , wherein a distance between the base and hole is less than a distance between the hole and the tip.7. The impeller spinner of claim 1 , wherein the head is axisymmetric and has a substantially smooth surface.8. The impeller spinner of claim 1 , wherein the fastener portion of the shank is threaded and wherein the first diameter is greater than the second diameter and less than a diameter of the base of the head.9. An anti-icing apparatus for a fuel pump comprises: a head having a base at one end and a tip at an opposite end; and', 'a shank having a body portion nearest the base of the head with a first diameter and a fastener portion adjacent to the body portion at an end opposite the head with a second diameter, wherein the first diameter is greater than the second diameter and less than a diameter of the base of the head., 'an impeller spinner comprising10. The anti-icing ...

Multi-part roller tappet

A roller tappet, in particular for a high-pressure fuel pump, is provided that is guided in the direction of the longitudinal axis thereof in a housing receptacle and is driven translatably in the longitudinal direction by cams of a camshaft. The roller tappet has a tappet body. This tappet body has a tappet skirt, a pump piston contact point (9), and a rotatably mounted roller (4), by which the roller tappet is supported on the camshaft. The tappet body has a guide cylinder (1), which is mounted in the housing receptacle and on which the roller (4) is supported, and a cup-shaped sleeve (7) having the pump piston contact point (9), which cup-shaped sleeve is supported in the guide cylinder (1) by a radial ring (8). A cylindrical constriction (5) is formed in the guide cylinder (1) in the region of the radial ring support.

Electromagnetically Actuated Rate Control Valve, in Particular for Controlling the Delivery Rate of a High-Pressure Fuel Pump

An electromagnetically actuable rate control valve for controlling a delivery rate of a high-pressure pump includes an electromagnet, a valve element, an armature shaft, and at least one strength element. The valve element is movable in an axial direction and is configured to open and to close the electromagnetically actuable rate control valve. The armature shaft transmits a force. The force is produced by the electromagnet and acts on the valve element in the axial direction. The at least one strength element is configured to raise at least the strength of the armature shaft. The armature shaft includes a needle region adjacent to the valve element and an armature region remote from the valve element. The needle region and the armature region are integral with each other. 1. An electromagnetically actuable rate control valve for controlling a delivery rate of a high-pressure pump , comprising:an electromagnet;a valve element movable in an axial direction and configured to open and to close the rate control valve;an armature shaft configured to transmit a force, produced by the electromagnet, the force acting on the valve element in the axial direction, the armature shaft including a needle region adjacent to the valve element and an armature region remote from the valve element, the needle region integral with the armature region; andat least one strength element configured to raise at least the strength of the armature shaft.2. The electromagnetically actuable rate control valve as claimed in claim 1 , wherein:the needle region has a first diameter that is smaller than a second diameter of the armature region; andthe at least one strength element is a rounded portion of an edge situated at a transition between the needle region and the armature region.3. The electromagnetically actuable rate control valve as claimed in claim 2 , wherein:the rounded portion includes a first partial rounded portion facing the needle region and having a first rounding radius, and a ...

High pressure pump for vehicle

A high pressure pump includes a housing with a chamber formed inside and a flow control valve and a discharge check valve installed in the chamber; a piston installed to operate up and down in an assembly hall formed in the housing to compress fuel in the chamber to a high pressure; a cylinder forming a gap between an inner circumferential surface and the piston and guiding reciprocation of the piston; and a support member seated on a stepped surface of the housing to surround an outside of the cylinder and configured to elastically support the housing and the cylinder, thereby reducing friction while preventing fuel leakage between the piston and the cylinder.

High-Pressure Fuel Pump

Provided is a high-pressure fuel pump which can fix a cylinder to a pump body using a simple structure, and can reduce a displacement amount inward in a radial direction of the cylinder. A high-pressure fuel pump includes a pump body which is formed with a pressing chamber and a cylinder which is inserted in a hole formed in the pump body. The cylinder is swaged to the hole by pressing a convex portion on an outside in a radial direction to fit into the hole on an opposite side to the pressing chamber, by screwing a formed screw thread into the hole, or by being swaged with the opposite side to the pressing chamber. The cylinder is formed with a clearance in the radial direction with respect to the hole of the pump body all over a region from a bonding portion to an upper end. 1. A high-pressure fuel pump , comprising: a pump body which is formed with a pressing chamber; and a cylinder which is inserted in a hole formed in the pump body ,wherein the cylinder is swaged to the hole by pressing a convex portion on an outside in a radial direction to fit into the hole on an opposite side to the pressing chamber, by screwing a formed screw thread into the hole, or by being swaged with the opposite side to the pressing chamber, andthe cylinder is formed with a clearance in the radial direction with respect to the hole of the pump body all over a region from a bonding portion to an upper end.2. The high-pressure fuel pump according to claim 1 ,wherein the clearance is formed to be 0.025 mm or more.3. The high-pressure fuel pump according to claim 1 ,wherein the cylinder includes a large diameter portion having an even thickness in the radial direction, and the convex portion is formed to protrude outside in the radial direction by 0.0165 mm or more from an outermost diameter portion of the large diameter portion in a lower portion of the large diameter portion.4. The high-pressure fuel pump according to claim 1 , further comprising:a plunger which slides on an inner ...

CANISTER STRUCTURE

A canister structure comprising: a canister in which activated carbon is accommodated, the activated carbon being for adsorbing evaporated fuel produced in a fuel tank; an atmosphere vent tube connected to the canister the atmosphere vent tube introducing air into the canister and causing evaporated fuel adsorbed by the activated carbon to be desorbed when a negative pressure acts in the canister and a fuel pump controller disposed in the canister the fuel pump controller controlling flow rates of fuel being supplied from the fuel tank to an engine, and the fuel pump controller generating heat due to being operated. 1. A canister structure comprising:a canister in which activated carbon is accommodated, the activated carbon being for adsorbing evaporated fuel produced in a fuel tank;an atmosphere vent tube connected to the canister, the atmosphere vent tube introducing air into the canister and causing evaporated fuel adsorbed by the activated carbon to be desorbed when a negative pressure acts in the canister; anda fuel pump controller disposed in the canister, the fuel pump controller controlling flow rates of fuel being supplied from the fuel tank to an engine, and the fuel pump controller generating heat due to being operated.2. The canister structure according to claim 1 , wherein dividing walls having thermal conductivity are plurally arranged in the canister claim 1 , and the activated carbon is packed in between neighboring dividing walls.3. The canister structure according to claim 2 , wherein the fuel pump controller comprises a circuit board and an accommodation portion claim 2 , the accommodation portion accommodating the circuit board and having thermal conductivity claim 2 , and wherein the accommodation portion is in contact with at least a portion of the dividing walls.4. The canister structure according to claim 1 , wherein at least a portion of a canister case that structures an outer shell of the canister is formed of a material having thermal ...

High pressure fuel pump

A fuel pump includes a housing provided with an axial bore defining a compression chamber. The pump is further provided with a cylindrical piston slidably arranged in the bore, the piston extending from a top extremity that is inside the bore, defining a high pressure extremity, to a lower extremity, defining a low pressure extremity. The piston is able to reciprocally slide between a lower position where fuel at low pressure enters the compression chamber via an inlet and, a top position where fuel present in the compression chamber is pressurized before being expelled via an outlet. The piston is also provided with a recess surrounded by a peripheral wall arranged on its high pressure extremity, the recess and peripheral wall enabling the piston to expand radially when fuel in the compression chamber is pressurized.

DIESEL WORK VEHICLE WITH DUEL FUEL TANKS

A work vehicle is provided with fuel supply lines that include a first fuel supply line that connects a first fuel tank and a junction. A second fuel supply line connects a second fuel tank and the junction. A common supply line connects the junction and a diesel engine. A fuel pump is provided on the common supply line. A first check valve is installed on the first fuel supply line and opens in accordance with a pressure differential between a pressure in the first fuel tank and a pressure in the junction. A second check valve is installed on the second fuel supply line and opens in accordance with a pressure differential between a pressure in the second fuel tank and a pressure in the junction. A fuel return line returns excess fuel from the diesel engine to the first fuel tank and the second fuel tank. 1. A work vehicle having a diesel engine , the work vehicle comprising:a first fuel tank;a second fuel tank;fuel supply lines including a first fuel supply line connecting a first fuel tank and a junction, a second fuel supply line connecting a second fuel tank and the junction, and a common supply line connecting the junction and the diesel engine;a fuel pump coupled to the common supply line and supplying the diesel engine with fuel from the first fuel tank and the second fuel tank;a first check valve installed on the first fuel supply line and opening in accordance with a pressure differential between a pressure in the first fuel tank and a pressure in the junction;a second check valve installed on the second fuel supply line and opening in accordance with a pressure differential between a pressure in the second fuel tank and a pressure in the junction; anda fuel return line returning excess fuel from the diesel engine to the first fuel tank and the second fuel tank.2. The work vehicle according to claim 1 , wherein the fuel return line comprises:a common return line connecting the diesel engine and a splitter;a first fuel return line connecting the splitter and ...

DAMPER DEVICE

There is provided a damper device that can be held in a housing space with simple work. A damper device, which is disposed and used in a housing space formed in a device unit, includes: a damper body that is filled with gas and includes a diaphragm provided with a deformable-action portion formed at a central portion thereof; and an annular clip that holds an outer peripheral edge portion of the damper body and causes a biasing force to act on an inner wall of a cover member, which forms the housing space, in a radial direction. 1. A damper device that is disposed and used in a housing space formed in a device unit , comprising:a damper body that is filled with gas and includes a diaphragm provided with a deformable-action portion formed at a central portion thereof; andan annular clip that holds an outer peripheral edge portion of the damper body and causes a biasing force to act on an inner wall of the device unit, which defines the housing space, in a radial direction.2. The damper device according to claim 1 ,wherein the damper body includes a stay member fixed to the diaphragm and provided with a cylindrical portion that surrounds the deformable-action portion of the diaphragm and that is brought into contact with the annular clip.3. The damper device according to claim 2 ,wherein the stay member is provided with a plurality of through-holes arranged in a circumferential direction so as to penetrate the stay member in the radial direction.4. The damper device according to claim 1 ,wherein the annular clip has an uneven shape in the circumferential direction.5. The damper device according to claim 4 ,wherein a groove portion with which the outer peripheral edge portion of the damper body is to be engaged is formed in a concave portion partially forming the uneven shape of the annular clip.6. The damper device according to claim 5 ,wherein the concave portion of the annular clip includes an inner peripheral end portion having the shape of a circular arc along the ...

DIRECT INJECTION FUEL PUMP

Methods and systems are provided for a direct injection fuel pump. The methods and system control pressure within a compression chamber so as to improve fuel pump lubrication. 1. A method , comprising: 'adding a pre-loaded accumulator upstream of the solenoid activated check valve, the pre-loaded accumulator having a substantially constant pressure-volume characteristic.', 'while a solenoid activated check valve at an inlet of a direct injection fuel pump is commanded to a pass-through state during a compression stroke in the direct injection fuel pump,'}2. The method of claim 1 , wherein a pressure relief valve is not positioned upstream of the solenoid activated check valve.3. The method of claim 2 , wherein the pre-loaded accumulator is in fluidic communication with a compression chamber of the direct injection fuel pump.4. The method of claim 3 , wherein the substantially constant pressure-volume characteristic of the pre-loaded accumulator is provided by a pre-loaded spring coupled to a piston in a bore with stops.5. The method of claim 3 , wherein the substantially constant pressure-volume characteristic of the pre-loaded accumulator is provided by a diaphragm with a pre-loaded spring with stops.6. The method of claim 3 , further comprising providing a pressure in the compression chamber of the direct injection fuel pump claim 3 , the pressure enabling a differential pressure greater than a threshold differential pressure between a top and a bottom of a piston of the direct injection fuel pump during the compression stroke in the direct injection fuel pump.7. The method of claim 6 , wherein the pressure is regulated via the pre-loaded accumulator as it provides fuel and pressure to the compression chamber of the direct injection fuel pump.8. The method of claim 2 , wherein a leak orifice enables a flow of fuel from the pre-loaded accumulator claim 2 , the flow of fuel being directed to an inlet of a check valve located upstream of the solenoid activated check ...

FUEL UNIT PUMP AND INTERNAL COMBUSTION ENGINE INCLUDING A FUEL UNIT PUMP

A fuel unit pump for an internal combustion engine includes a fuel unit pump body, a pumping plunger and a roller tappet for contacting a cam lobe of a rotatable shaft of the internal combustion engine. The roller tappet includes a roller tappet body connected to the pumping plunger, and a cam roller rotatably mounted on a cam roller carrier and defining a cam roller rotation axis. The cam roller carrier is coupled to the roller tappet body and is elastically deformable for aligning the cam roller with the cam lobe. 114-. (canceled)15. A fuel unit pump for an internal combustion engine having a rotatable shaft with a cam lobe , the fuel unit pump comprising:a fuel unit pump body;a pumping plunger; anda roller tappet configured to contact the cam lobe and having a roller tappet body connected to said pumping plunger, and a cam roller rotatably mounted on a cam roller carrier and defining a cam roller rotation axis, wherein said cam roller carrier is coupled to said roller tappet body and is elastically deformable for aligning said cam roller with said cam lobe.16. The fuel unit pump according to claim 15 , wherein said cam roller carrier comprises a material having an elastic modulus that is less than an elastic modulus of a material of the roller tappet body.17. The fuel unit pump according to claim 15 , wherein said cam roller carrier comprises an elastic material claim 15 , and a cross section of the cam roller carrier has a moment of inertia enabling deformation of the cam roller carrier for aligning said cam roller with said cam lobe.18. The fuel unit pump according to claim 17 , wherein said cross section comprises an arc-shaped cross section.19. The fuel unit pump according to claim 15 , wherein said roller tappet body defines a body axis and said cam roller carrier is elastically deformable to tilt said cam roller rotation axis at least in a rotation plane including the rotation axis and parallel to body axis.20. The fuel unit pump according to claim 15 , ...

METHOD FOR DETERMINING QUALITY OF HIGH-ENERGY BEAM WELDING, QUALITY DETERMINATION APPARATUS USING THIS DETERMINATION METHOD, AND WELDING MANAGEMENT SYSTEM USING THIS DETERMINATION METHOD

An object of the present invention is to, in high-energy beam welding, improve accuracy of determining a welding quality or accuracy of maintaining a certain welding quality by feedback, thereby improving efficiency of manufacturing a welded product, i.e., a yield. One aspect of the present invention acquires an image of a molten pool by a camera, acquires a width, a length, and an area of the molten pool by image processing, further acquires reflected light, plasma, and thermal radiation light by an optical sensor, and carries out a multiple regression analysis with use of the above-described signals and a signal having an interaction effect among them, thereby accurately predicting a weld penetration depth and thus accurately determining the welding quality. Along therewith, the one aspect of the present invention also predicts a beam output and a focal position, and performs feedback control on the beam output and the focal position, thereby keeping the beam output and the focal position at appropriate values and thus maintaining the certain welding quality. 1. A method for determining a quality of high-energy beam welding that welds a welding target object by irradiating the welding target object with a high-energy beam , the method for determining the quality of the high-energy beam welding comprising:acquiring a predicted value of a weld penetration depth of a molten pool based onshape information of the molten pool that is detected by performing image processing on an image of the molten pool captured by a camera,welding optical sensor information including plasma light that is detected by a welding optical sensor, anda partial regression analysis coefficient acquired by carrying out a multiple regression analysis with the weld penetration depth of the molten pool set as an objective variable and the shape information and the welding optical sensor information set as explanatory variables; anddetermining the quality of the welding by comparing the predicted ...

Pump Control Apparatus And Method

A pumping system includes s pump, a mechanical coupling device, and a cam shaft. The pump is effective to transfer fuel into an engine. The mechanical coupling device is coupled to the pump. The cam shaft couples to the mechanical coupling device. The cam shaft has an axis extending there through and rotates about the axis. The rotating of the cam shaft is effective to engage the mechanical coupling device and transfer a mechanical force created by the rotating to the mechanical coupling device. The mechanical coupling device is engaged to allow the mechanical force to be transferred to the fuel pump and activate the fuel pump when fuel is to be moved by the pump. The mechanical coupling device is disengaged to disallow the mechanical force from being transferred to the fuel pump and prevent the operation of the fuel pump. 1. A pumping system for use in a vehicle , the system comprising:a pump, the pump being effective to transfer fuel into an engine;a mechanical coupling device coupled to the pump;a cam shaft that couples to the mechanical coupling device, the cam shaft having an axis extending there through, the cam shaft rotating about the axis, the rotating of the cam shaft being effective to engage the mechanical coupling device and transfer a mechanical force created by the rotating to the mechanical coupling device;such that the mechanical coupling device is engaged to allow the mechanical force to be transferred to the fuel pump and activate the fuel pump when fuel is to be moved by the pump and such that the mechanical coupling device is disengaged to disallow the mechanical force from being transferred to the fuel pump and prevent the operation of the fuel pump.2. The system of claim 1 , wherein the mechanical coupling device comprises a tappet.3. The system of claim 2 , wherein the tappet includes a spring that couples to the fuel pump.4. The system of claim 2 , wherein the tappet comprises a rotating wheel that selectively couples to the cam shaft.5. The ...

Device having an active coating comprising nano catalyst of oxides of titanium, silicon and aluminum for saving fuel in a combustion chamber

The present invention relates to a fuel saving device for a combustion chamber comprising a coating on a surface in fuel passageway of the device through which the fuel to be entered and burnt in the combustion chamber flows, wherein the coating comprises nanosized particles of TiO 2 , SiO 2 and Al 2 O 3 in an epoxy coating composition.

SINGLE PISTON PUMP WITH REDUCED PISTON SIDE LOADS

In a tappet-driven single piston pump, piston side loads caused by return spring out-of-squareness are eliminated by effectively piloting the piston return spring, preferably the associated spring seat, by the tappet, thereby allowing the tappet to bear the spring side load. The piston engages and is returned by the spring seat, but radial clearance between the piston and spring seat is greater than radial clearance between the spring seat and tappet, thus eliminating side loading imparted to the piston. The spring seat can be considered a piston retainer, in which the piston is not closely attached to the retainer but instead exhibits a predefined radial clearance greater than the piloting clearance between the retainer and the tappet. 1. A cam-driven high pressure single piston fuel pump having a pump housing , a pumping chamber within the pump housing , a piston with one end in the pumping chamber and another end outside the pump housing , a bore within the housing in which the piston reciprocates on a pumping axis between a retracting motion during which fuel is delivered to the pumping chamber and a pumping motion during which the piston pressurizes fuel in the pumping chamber , a tappet coaxially aligned with the piston , having one end adapted to be reciprocally driven by a rotating cam and another end operatively associated with the other end of the piston for reciprocating the piston; a coil return spring seated between the housing and a retainer , with the return spring and retainer coaxially aligned with the piston and operatively associated with the piston , for biasing the other end of the piston away from the pumping chamber; wherein the tappet and the retainer have radially overlapping concentric walls with a radial gap that accommodates side loads on the spring.2. The fuel pump of claim 1 , wherein the other end of the piston is operatively associated with the retainer by a profiled tip of the piston that is captured in a recess of the retainer with ...

POLYACETAL RESIN COMPOSITION

A polyacetal resin composition capable of minimizing degradation when a molded body thereof comes into contact with an acidic cleaner. The polyacetal resin composition contains with respect to (A) 100 parts by mass of a polyacetal copolymer in which the amount of a hemiformal end group is 0.8 mmol/kg or less, (B) more than 1.0 parts by mass and at most 5.0 parts by mass of a hindered phenol-based antioxidant, and (C) more than 4.0 parts by mass and at most 30 parts by mass of magnesium oxide. 1. A polyacetal resin composition , comprising: (A) a polyacetal copolymer in an amount of 100 parts by mass , wherein the polyacetal copolymer (A) has a hemiformal end group content of 0.8 mmol/kg or less ,(B) a hindered phenol-based antioxidant in an amount of more than 1.0 part by mass and 5.0 parts by mass or less, and(C) magnesium oxide in an amount of more than 4.0 parts by mass and 30 parts by mass or less.2. The polyacetal resin composition according to claim 1 , comprising 0.5 to 10 parts by mass of (D) a polyalkylene glycol.3. An automotive part or motorcycle part comprising a molded product of the polyacetal resin composition according to or .4. The automotive part or motorcycle part according to claim 3 , wherein the automotive part or motorcycle part is a part to be brought into contact with an acidic cleaner.5. A method for improving acid resistance against an acid component derived from a strongly acidic component claim 3 , wherein the method comprises using an automobile part or motorcycle part comprising the molded product of the polyacetal resin composition according to or .6. The method according to claim 5 , wherein the acid component is derived from an acidic cleaner. The present invention relates to a polyacetal resin composition having high resistance against acidic components.Since polyacetal resins have excellent chemical resistance, molded products formed of a polyacetal resin as a raw material have been widely used for automobile components. For ...

PISTON DEVICE AND PUMP DEVICE

In order to provide a piston device that is of simple construction and provides optimised sealing, it is proposed that the piston device should include the following: a housing that includes a piston receptacle; a piston that is arranged to be linearly displaceable in the piston receptacle; a main gasket element that separates a first medium space from a second medium space, and a supplementary gasket element, different from the main gasket element, for sealing in a region between the piston and the piston receptacle. 2. A piston device according to claim 1 , wherein the piston receptacle includes a guide device against which the piston abuts and by means of which the piston is guided in linearly displaceable manner claim 1 , wherein the supplementary gasket element abuts on one side against a guide element of the guide device and on the other against the piston.3. A piston device according to claim 2 , wherein the guide element takes the form of a hollow slide cylinder.4. A piston device according to claim 2 , wherein the piston is movable to and fro between two end positions claim 2 , wherein claim 2 , in one end position of the piston claim 2 , in which it is moved to the maximum extent in the direction of the second medium space claim 2 , the supplementary gasket element is arranged in an end region of the guide device that faces the second medium space.5. A piston device according to claim 1 , wherein the supplementary gasket element takes a resilient form and/or the form of a sealing ring forming a closed ring claim 1 , in particular a piston ring forming a closed ring.6. A piston device according to claim 1 , wherein the supplementary gasket element has a projection that protrudes radially outwards and forms a sealing edge for the supplementary gasket element to abut against the piston receptacle.7. A piston device according to claim 1 , wherein the supplementary gasket element is received in a ring-shaped groove claim 1 , wherein the groove is preferably ...

Fuel pump

A fuel pump includes a plunger that reciprocates in a cylinder. The fuel pump further includes a first mover connected to the plunger, a second mover serving as a counterweight for the first mover, an electromagnet provided between the first mover and the second mover, a first magnetic member provided between the first mover and the second mover, and a first spring urging the first mover and the second mover away from each other. Further, a second magnetic member is provided between both of the electromagnet and the first magnetic member and a first inclined surface of the first mover, while a third magnetic member is provided between both of the electromagnet and the first magnetic member and a second inclined surface of the second mover.

Direct current (dc) motor for fuel pump for vehicle

Provided is a DC motor for a fuel pump for a vehicle. The DC motor for a fuel pump for a vehicle includes: a housing whose inside is hollow; a stator coupled to the inside of the housing and having a first permanent magnet whose N pole is disposed inwardly in a radial direction and a second permanent magnet whose S pole is disposed inwardly in a radial direction, the first permanent magnet and the second permanent magnet being spaced apart from each other to face each other; and a rotor disposed on an inside of the stator while being spaced apart from the stator, in which a first gap g 1 between the first permanent magnet and the rotor is different from a second gap g 2 between the second permanent magnet and the rotor, whereby a torque ripple that is a fluctuation width of a cogging torque is reduced.

High pressure pump for a fuel injection system

The invention relates to a high pressure pump for a fuel injection system, in particular a common rail injection system, comprising a housing part ( 1 ) with a bore ( 2 ), in which a pump piston ( 3 ) is received such that it can be moved with a reciprocating movement, which pump piston ( 3 ) is supported via a tappet assembly ( 4 ) on a cam ( 5 ) or eccentric and delimits a pump working chamber ( 6 ) in the axial direction, which pump working chamber ( 6 ) can be filled with fuel via an upstroke valve ( 7 ) which is integrated into the high pressure pump. According to the invention, a feed bore ( 8 ) is configured in the housing part ( 1 ) in order to supply the upstroke valve ( 7 ) with fuel, which feed bore ( 8 ) is connected to a bore ( 11 ) of a further housing part ( 12 ), which bore ( 11 ) connects a pump interior chamber ( 9 ) and a tappet chamber ( 10 ).

OIL FILTER

An oil filtration system including an oil reservoir and a first conduit assembly having a first end and a second end. The first conduit assembly being in fluid communication with the oil reservoir at the first end, and an HEUI pump at the second end. The first conduit assembly includes a first pump coupled to the first conduit assembly, and disposed downstream of the oil reservoir. The first pump adapted to pump oil from the oil reservoir to the first conduit assembly. A primary filter coupled to the first conduit assembly, and disposed downstream of the first pump. A bypass conduit disposed in parallel configuration with the primary filter, and adapted to provide a bypass path for flow of oil therethrough, thereby preventing flow of oil through the primary filter. A secondary filter coupled downstream to both the first conduit assembly and the bypass conduit, and disposed upstream of HEUI pump. 1an oil reservoir; a first pump coupled to the first conduit assembly, the first pump disposed downstream of the oil reservoir, wherein the first pump is adapted to pump oil from the oil reservoir to the first conduit assembly;', 'a primary filter coupled to the first conduit assembly, the primary filter disposed downstream of the first pump;, 'a first conduit assembly having a first end and a second end, the first conduit assembly being in fluid communication with the oil reservoir at the first end, and the first conduit assembly being in fluid communication with the HEUI pump at the second end, the first conduit assembly including,'}a bypass conduit disposed in parallel configuration with the primary filter, the bypass conduit adapted to provide a bypass path for flow of oil therethrough, thereby preventing flow of oil through the primary filter; anda secondary filter coupled downstream to both the first conduit assembly and the bypass conduit;wherein the secondary filter is disposed upstream of the HEUI pump.. An oil filtration system for a Hydraulically actuated ...

METHOD AND DEVICE FOR OPERATING A PRESSURE RESERVOIR, IN PARTICULAR FOR COMMON RAIL INJECTION SYSTEMS IN AUTOMOBILE ENGINEERING

A method and to a device for operating a pressure reservoir, where during a compression phase in a pump chamber, a pump periodically increases the pressure of a fluid located therein, and by means of a discharge valve controlled by differential pressure fluid under high pressure is allowed to be introduced from the pump chamber into the pressure reservoir. During a decompression phase following a compression phase, fluid from a fluid reservoir is introduced into the pump chamber by means of a controllable intake valve. In order to be able also to operate the pressure reservoir without a high pressure measurement directly in the pressure reservoir, the fluid pressure in the pressure reservoir is ascertained by means of a pressure determination in the pump chamber. The pressure determination takes place indirectly, monitoring of the intake valve in the decompression phase. 1. A method for operating a pressure accumulator , in which method a pump periodically , during a compression phase in a pump chamber , increases the pressure of a fluid situated therein , and fluid at high pressure is admitted from the pump chamber into the pressure accumulator by way of a differential-pressure-controlled discharge valve , and in which method , during a decompression phase following a compression phase , fluid is admitted from a fluid reservoir into the pump chamber by way of a controllable intake valve , comprising the steps of:determining the fluid pressure in the pressure accumulator by way of a pressure determination in the pump chamber.2. The method as claimed in claim 1 , further comprising the steps of measuring the pressure in the pump chamber at a time between the closure of the discharge valve and the subsequent admission of fluid into the pump chamber.3. The method as claimed in claim 2 , further comprising the steps of determining the pressure in the pump chamber at the time of the opening of the intake valve claim 2 , in particular by way of the determination of the ...

FLUID PUMP

A fluid pump includes an inlet for introducing fluid into the fluid pump and an outlet for discharging the fluid from the fluid pump A motor is included having an armature which rotates about an axis. The motor also has a stator which circumferentially surrounds the armature such that a fluid passage is defined radially between the armature and stator through which the fluid flows from the inlet to the outlet. A pumping arrangement is rotated by the armature and pumps the fluid from the inlet to the outlet. A flow impedance member extends axially in the fluid passage which impedes circumferential flow of the fluid within the fluid passage, thereby generating a pressure gradient circumferentially within the fluid passage which applies a lateral force to the armature. 1. A fluid pump comprising:an inlet for introducing fluid into said fluid pump;an outlet for discharging said fluid from said fluid pump;a motor having an armature which rotates about an axis such that said armature is supported at one end by a first bearing and at a second end by a second bearing, said motor also having a stator which circumferentially surrounds said armature such that a fluid passage is defined radially between said armature and said stator through which said fluid flows from said inlet to said outlet;a pumping arrangement which is rotated by said armature and which pumps said fluid from said inlet to said outlet;a flow impedance member extending axially in said fluid passage which impedes circumferential flow of said fluid within said fluid passage, thereby generating a pressure gradient circumferentially within said fluid passage which applies a lateral force to said armature, wherein a distance from said armature to said flow impedance member in a direction radially relative to said axis is less than a dimension of said fluid passage in a direction radially relative to said axis at a location that is diametrically opposed to said distance from said armature to said flow impedance ...

High-pressure connection device, high-pressure fuel pump, and method for producing a high-pressure connection device for a high-pressure fuel pump

The invention relates to a high-pressure connection device () for a high-pressure fuel pump (), having the following:—an outlet device () for discharging fuel () from the high-pressure fuel pump ();—a connection device () for connecting the outlet device () to elements arranged downstream of the outlet device;—a welding seam () for connecting the outlet device () and the connection device (); and—a pretensioning device () for exerting a pretension force (F) onto the welding seam () in the direction of the outlet device (). The invention further relates to a high-pressure fuel pump () which has such a high-pressure connection device () and to a method for producing such a high-pressure connection device (). 110-. (canceled)11. A high-pressure connection device for connecting a high-pressure fuel pump to one or more elements of a fuel injection system , the high-pressure connection device comprising:an outlet which discharges fuel from the high-pressure fuel pump;a connector connecting the outlet to the one or more elements of the fuel injection system;a weld seam which connects the outlet and the connector; anda pretensioner configured to exert a tension force on the weld seam.12. The high-pressure connection device of claim 11 , further comprising a fuel inlet volume in the connector claim 11 , and a pressure-relief valve disposed in the outlet such that the pressure-relief valve opens into the fuel inlet volume claim 11 , wherein the fuel inlet is configured to admit fuel that flows out of the outlet and into the connector.13. The high-pressure connection device of claim 12 , wherein the pretensioner has a pretensioning face directed toward the outlet and which applies the tension force to the weld seam claim 12 , the weld seam being supported on a contact face of the connector.14. The high-pressure connection device of claim 13 , wherein the pretensioning face and the contact face of the connector are in contact in a contact region disposed so as to be ...

Volume Flow-Regulated Seat Valve

The invention is a volume control valve for controlling and metering a fluid in a motor vehicle, comprising a tappet with an actuating end and a free end, said tappet being received in a bearing bush and mounted along its actuating axis so as to be movable back and forth, and a seat valve which is connected to a fluid channel and arranged relative to the tappet in such a way that the free end of the tappet can engage in the valve seat and close the fluid channel when it is engaged in said valve seat, and further comprising a pressure spring which is arranged along the longitudinal axis of the tappet. According to the invention, a welded plate is fastened and/or welded and/or formed on the tappet with the pressure spring arranged thereon, which is supported on the welded plate and the bearing bush.

High pressure fuel pump

A high pressure fuel pump includes a pumping head and a plunger slidably adjusted in a bore. The plunger is provided with a blind bore defining a chamber open in the head end of the plunger and in fluid communication with the compression chamber, the end face of the plunger being limited to a peripheral annular face surrounding the opening, the bore further defining a peripheral cylindrical wall and a bottom face. A filler member is arranged inside the chamber.

FUEL PUMP FOR VEHICLE HAVING BRUSH HOLDER FOR PREVENTING SHAKE OF BRUSH

The present invention relates to a fuel pump for vehicle supplying power to a commutator and an armature through a brush to prevent the brush from shake, which comprises the brush, a spring mounted on a top of the brush, the commutator contacted to a bottom of the brush, a brush holder surrounding the brush and the spring, and a first hole formed for fuel flow at a front side of the brush holder in a rotational direction of the commutator based on the brush. 1. A fuel pump for a vehicle supplying power to a commutator and an armature through a brush , the fuel pump comprising:a brush;a spring mounted on a top of the brush;a commutator contacted to a bottom of the brush;a brush holder surrounding the brush and the spring; anda first hole formed for fuel flow at a front side of the brush holder in a rotational direction of the commutator based on the brush.2. The fuel pump according to claim 1 , wherein the first hole is formed for fuel flow at an upper portion of the front side of the brush holder.3. The fuel pump according to claim 2 , wherein the first hole is extended to a bottom of the brush holder and the bottom of the first hole is open.4. The fuel pump according to claim 1 , wherein the brush holder further includes a second hole for fuel flow at a lower portion of a back side of the brush holder in the rotational direction of the commutator based on the brush.5. The fuel pump according to claim 2 , wherein the brush holder further includes a second hole for fuel flow at a lower portion of a back side of the brush holder in the rotational direction of the commutator based on the brush. This application claims priority under 35 U.S.C. 119 to Korean Patent Application No. 10-2015-0147693, filed on Oct. 23, 2015 in the Korean Intellectual Property Office, the disclosure of the above-cited application is incorporated herein by reference in its entirety for all purposes.The present invention relates to a fuel pump having brush holder for preventing shake of brush ...

HIGH-PRESSURE PUMP ARRANGEMENT FOR A COMBUSTION ENGINE AND METHOD FOR MANUFACTURING THE SAME

A high-pressure pump arrangement for a combustion engine comprises a high-pressure pump with the first flange, a pump guidance with a second flange. The high-pressure pump is at least partially arranged in the pump guidance and the pump guidance is arranged in the combustion chamber. A first thermally insulating layer is at least partially arranged between the first flange and the second flange. 1. A high-pressure pump arrangement for a combustion engine comprising: 'a pump guidance having a second flange,', 'a high-pressure pump having a first flange; and'}wherein the high-pressure pump is at least partially arranged in the pump guidance, 'wherein a first thermally insulating layer is at least partially arranged between the first flange and the second flange.', 'wherein the pump guidance is arranged in the combustion engine, and'}2. The high-pressure pump arrangement according to claim 1 , wherein the high-pressure pump comprises a tappet that is at least partially movable within the pump guidance.3. The high-pressure pump arrangement according to claim 1 , wherein a second thermally insulating layer is at least partially arranged between the second flange and the combustion engine.4. The high-pressure pump arrangement according to claim 1 , wherein surfaces of the tappet comprise at least partially a third thermally insulating layer.5. The high-pressure pump arrangement according to claim 1 , wherein an inner surface of the pump guidance comprises at least partially a fourth thermally insulating layer.6. The high-pressure pump arrangement according to claim 3 , wherein the first thermally insulating layer and the second thermally insulating layer comprise rubber layers.7. The high-pressure pump arrangement according to claim 1 , wherein the third thermally insulating layer and the fourth thermally insulating layer comprise at least one of ceramic materials and diamond-like carbon.8. A method for manufacturing a high-pressure pump arrangement for a combustion ...

HIGH-PRESSURE PUMP

A high-pressure pump includes a pump body, a cylinder, a plunger, and a plug. The pump body has a fuel chamber therein into which fuel is supplied. The cylinder is disposed inside the pump body and having one end immediately adjacent to the fuel chamber. The cylinder has an inner threaded portion formed on an inner wall of the cylinder at the one end. The plunger is disposed inside the cylinder and is reciprocally movable in an axial direction to change a volume of a pressurizing chamber within which the fuel supplied from the fuel chamber is pressurized. The plug is screwed into the inner threaded portion of the cylinder from the fuel chamber in the axial direction and closing the one end of the cylinder. The plug has an end surface that faces an end surface of the plunger and defines the pressurizing chamber together with the end surface of the plunger. The end surface of the plug is parallel to the end surface of the plunger. 1. A high-pressure pump comprising:a pump body having a fuel chamber therein into which fuel is supplied;a cylinder disposed inside the pump body and having one end immediately adjacent to the fuel chamber, the cylinder having an inner threaded portion formed on an inner wall of the cylinder at the one end;a plunger disposed inside the cylinder and reciprocally movable in an axial direction to change a volume of a pressurizing chamber within which the fuel supplied from the fuel chamber is pressurized; anda plug screwed into the inner threaded portion of the cylinder from the fuel chamber in the axial direction and closing the one end of the cylinder, whereinthe plug has an end surface that faces an end surface of the plunger and defines the pressurizing chamber together with the end surface of the plunger, andthe end surface of the plug is parallel to the end surface of the plunger.2. The high-pressure pump according to claim 1 , wherein an outer threaded portion that is screwed into the inner threaded portion of the cylinder, and', 'a head ...

Camshaft and follower geometry

An internal combustion engine includes a camshaft with a lobe rotatable about a camshaft axis and a follower and which follows the lobe and is reciprocated along a follower axis by the lobe. A contact force is generated between the lobe and the follower such that the contact force is cyclic between a minimum contact force and a maximum contact force. The follower axis is offset from the camshaft axis such that the lobe contacts the follower at a contact point that is substantially aligned with the follower axis when the maximum contact force is generated between the lobe and the follower. In this way, the side load on the follower is minimized.

AN OIL LUBRICATED COMMON RAIL DIESEL PUMP

An oil lubricated common rail diesel pump includes a pumping assembly and a drivetrain assembly. The pumping assembly includes a pump housing and a plunger mounted along a pumping axis. The drivetrain assembly includes a driveshaft and a cam mounted within a first chamber of a drivetrain housing. The plunger is arranged for reciprocating linear movement along the pumping axis within a second chamber of the housing upon rotation of the cam. The drivetrain assembly also includes a guide mounted within the housing between the cam and the plunger and being adapted to receive a cam follower. At least the housing is adapted to be substantially filled with oil in use and the guide includes at least one flow passage communicating between the first chamber and the second chamber. 115-. (canceled)16. An oil lubricated common rail diesel pump comprising:a pumping assembly; anda drivetrain assembly; a pump housing; and', 'a plunger mounted along a pumping axis;', 'the drivetrain assembly comprising:, 'the pumping assembly comprising a drivetrain housing having a first chamber and a second chamber;', 'a cam mounted within the first chamber, the plunger being arranged for reciprocating linear movement along the pumping axis within the second chamber upon rotation of the cam; and', 'a guide mounted within the drivetrain housing between the cam and the plunger and being adapted to receive a cam follower; wherein at least the drivetrain housing is adapted to be substantially filled with oil in use and the guide comprises at least one flow passage communicating between the first chamber and the second chamber of the drivetrain housing, wherein the drivetrain housing comprises an oil inlet adapted to deliver oil to the first chamber of the drivetrain housing in a region of the cam., 'a driveshaft;'}17. The oil lubricated common rail diesel pump according to claim 16 , wherein the guide comprises a guide body comprising first and second ends and the at least one flow passage extends ...

FUEL PUMP APPARATUS

A hydraulic head assembly includes a hydraulic head and an adaptor. The hydraulic head has a first bore and a pumping chamber. The adapter has a second bore. The adapter is connected to the hydraulic head such that the first and second bores are disposed coaxially to form a pumping element bore. A pumping element is disposed within the first and second bores for pressurising fuel in the pumping chamber. A first seal is formed between the pumping element and the hydraulic head; and a second seal is formed between the pumping element and the adapter. 1. A hydraulic head assembly comprising:a hydraulic head having a first bore and a pumping chamber;an adapter having a second bore, the adapter being connected to said hydraulic head such that said first and second bores form a substantially continuous pumping element bore; anda pumping element disposed within said pumping element bore for pressurising fuel in the pumping chamber;wherein a first seal is formed between the pumping element and the hydraulic head; and a second seal is formed between the pumping element and the adapter,wherein the hydraulic head comprises a turret through which the first bore extends, the adapter being connected to said turret,wherein the adapter comprises a mounting section for mounting the adapter to the hydraulic head,wherein the mounting section comprises a collar for cooperating with the turret,wherein the collar is an interference fit with an external sidewall of the turret.2. A hydraulic head assembly as claimed in claim 1 , wherein the first seal is a high pressure seal; and the second seal is a low pressure seal.3. A hydraulic head assembly as claimed in claim 1 , wherein the adapter comprises a polymeric seal for cooperating with the pumping element.4. A hydraulic head assembly as claimed in any claim 1 , wherein a leakage path is formed between the turret and the adapter.5. A hydraulic head assembly as claimed in comprising a collection chamber in communication with the leakage ...

Fuel System Improvements with High Pressure Pump for Welder Generators

A portable engine-driven system comprising an engine, wherein the engine is configured to drive a generator, a fuel tank, and a high pressure fuel pump operatively coupled to the engine and the fuel tank. The high pressure fuel pump may be positioned within the fuel tank and configured to pump fuel from the fuel tank to the engine. A check valve and a fuel pressure regulator may be positioned in line between the high pressure fuel pump and the engine, wherein the pressure regulator is configured to regulate a pressure of the fuel between the high pressure fuel pump and the engine. The pressure regulator may be positioned within the fuel tank. 1. An engine-driven generator comprising:an engine, wherein the engine is configured to drive a generator;a fuel tank; wherein the high pressure fuel pump is configured to pump fuel from the fuel tank to the engine, and', 'wherein the high pressure fuel pump is positioned within the fuel tank;, 'a high pressure fuel pump operatively coupled to the engine and the fuel tank,'}a check valve positioned in line between the high pressure fuel pump and the engine; anda pressure regulator configured to regulate a pressure of the fuel between the check valve and the engine, wherein the pressure regulator is positioned within the fuel tank.2. The engine-driven generator of claim 1 , wherein the high pressure fuel pump is an impeller fuel pump.3. An engine-driven generator comprising:an engine, wherein the engine is configured to drive a generator;a fuel tank; and wherein the fuel pump is configured to pump fuel from the fuel tank to the engine, and', 'wherein the fuel pump is positioned within the fuel tank., 'a fuel pump operatively coupled to the engine and the fuel tank,'}4. The engine-driven generator of claim 3 , wherein the engine-driven generator further comprises a check valve positioned in line between the fuel pump and the engine.5. The engine-driven generator of claim 4 , wherein the engine-driven generator further comprises a ...

Pinless tappet in a common rail high pressure fuel pump

A system for preventing rotation of a tappet includes a tappet having an outer casing and a central axis which is configured to reciprocate linearly along the central axis. The outer casing includes a flat portion having a length along the central axis and having a width. Additionally, the system includes a lock bar fixed in position relative to the linear oscillation of the outer casing. The lock bar is positioned in proximity to the flat portion of the outer casing. Upon rotation of the outer casing about the central axis, the lock bar is configured to come into contact with the cuter casing and inhibit additional rotation of the outer casing.

High-pressure pump

In a high-pressure pump, a relief valve seat surrounds an opening of a relief valve passage of a valve seat main body in a first space. A relief valve member includes a relief valve main body and a relief valve seat portion. The relief valve main body has a rod shape. The relief valve seat portion is integrated with an end of the relief valve main body so as to be capable of contacting the relief valve seat. The relief valve member is provided in the first space so as to be reciprocable in an axial direction. A relief valve urging member urges the relief valve member toward the relief valve seat. A support portion includes a support main body that slidably supports an outer wall of the relief valve main body so as to guide a reciprocating movement of the relief valve member in the axial direction.

Tank system

A tank system for a construction machine includes a fuel tank having an outer tank wall that closes off a tank volume to the outside, a withdrawal tank volume, which is separated by a partition wall from a main tank volume of the tank volume and has a fuel-exchanging connection to the main tank volume, and a fuel withdrawal arrangement having a main fuel pump and a withdrawal line opening into the withdrawal tank volume for conveying fuel by the main fuel pump via the withdrawal line from the withdrawal tank volume to a fuel-consuming system region. The tank system also includes a fuel feed arrangement having an auxiliary fuel pump for conveying fuel from the main tank volume into the withdrawal tank volume.

Pump for Supplying High-Pressure Fuel

A pump for supplying high-pressure includes a plunger, a cylinder, a body, and a holder. The uppermost end surface of the cylinder is an end of the cylinder that is closest to the pressurizing chamber. A first gap formed between the outer periphery of the cylinder and the body in the radial direction is smaller than a second gap formed in the radial direction between the inner diameter of the pressurizing chamber and the outer diameter of the plunger. A radial gap is formed in an entire area of the cylinder in an axial direction thereof. 1. A pump for supplying high-pressure fuel comprising:a plunger which pressurizes fuel in a pressurizing chamber;a cylinder which guides the reciprocating movement of the plunger on an inner peripheral side face of the cylinder;a body in which the cylinder is arranged; anda holder that is disposed between the cylinder and the body,whereinthe cylinder has an end face that is pressed against the body and which opposes the body, and wherein the entire cylinder is disposed on the side opposite to the pressurizing chamber relative to the end face,an uppermost end surface of the cylinder is the only surface of the cylinder that directly contacts the body of the pump, a radially outwardmost side of the cylinder directly contacts the holder at a given region,along a longitudinal direction of a low fuel-pressure portion of the pump, the given region is located in an upper half of the low fuel-pressure portion, andthe uppermost end surface of the cylinder is an end of the cylinder that is closest to the pressurizing chamber,a first gap formed between the outer periphery of the cylinder and the body in the radial direction is smaller than a second gap formed in the radial direction between the inner diameter of the pressurizing chamber and the outer diameter of the plunger,a radial gap is formed in an entire area of the cylinder in an axial direction thereof, andthe first gap is smaller than the second gap.2. A pump for supplying high-pressure ...

INTERNAL COMBUSTION ENGINE FUEL, PREFERABLY DIESEL FUEL, FEED PUMP ASSEMBLY

Internal combustion engine fuel, preferably diesel fuel, feed pump assembly, the pump assembly () comprising a pump body (); at least one cylinder () formed in the pump body () and extending along an axis (A); a seat () formed in the pump body (), at one end of the cylinder (); an intake valve () for selectively controlling fuel feed into the cylinder (), which is housed inside the seat () and in turn comprises a valve body (); and an annular seal () extending around the axis (A) and fitted inside the seat () between the valve body () and the pump body (); the pump assembly () being characterized in that the valve body () is positioned contacting the annular seal () along a contact surface () of the valve body () and close to a surface portion adjacent to a radially inner peripheral edge () of the seal (); the valve body () having an annular step () along another surface portion adjacent to a radially outer peripheral edge () of the seal (). 1126221226186122526212252125264525462625485226. An internal combustion engine fuel , feed pump assembly , the pump assembly () comprising a pump body (); at least one cylinder () formed in the pump body () and extending along an axis (A); a seat () formed in the pump body () , at one end of the cylinder (); an intake valve () for selectively controlling fuel feed into the cylinder () , wherein the intake valve is housed inside the seat () and in turn comprises a valve body (); and an annular seal () extending around the axis (A) and fitted inside the seat () between the valve body () and the pump body (); the pump assembly () being characterized in that the valve body () is positioned contacting the annular seal () along a contact surface () of the valve body () and close to a surface portion adjacent to a radially inner peripheral edge () of the seal (); the valve body () having an annular step () along another surface portion adjacent to a radially outer peripheral edge () of the seal ().248502626. A fuel feed pump assembly ...

Cam follower roller device with spacer

The cam follower roller device provides a tappet body extending along an axis, an insert mounted in the tappet body, a pin mounted at least on the insert and a roller mounted on the pin. The device further provides a spacer having a body mounted axially against the insert and with retaining means, cooperating with the insert for fixing the spacer to the insert.

FUEL UNIT PUMP ASSEMBLY COMPRISING AN ISOLATOR

A fuel unit pump assembly includes a fuel unit pump and an isolator. The fuel unit pump includes a pump mounting flange protruding from a pump body. The isolator includes an isolator body having a substantially plate shape and provided with at least one through hole for pump mounting fasteners to couple the pump mounting flange to a first surface of the isolator body. The isolator further includes at least one engine coupling portion protruding from a second surface of the isolator body, opposite to the first surface. The engine coupling portion is provided with at least one through hole for engine mounting fasteners to couple the isolator to an engine structure of the internal combustion engine. 17-. (canceled)8. A fuel unit pump assembly comprising:a fuel unit pump including a pump mounting flange protruding from a pump body; andan isolator including an isolator body having a substantially plate shape with at least one through hole configured to receive a pump mounting fastener for coupling the pump mounting flange to a first surface of the isolator body, the isolator further including at least one engine coupling portion protruding from a second surface of the isolator body, opposite said first surface, with at least one through hole configured to receive an engine mounting fastener for coupling the isolator to an engine structure of an internal combustion engine.9. The fuel unit pump assembly according to claim 8 , wherein the isolator comprises a through opening for inserting at least a pumping plunger of the fuel unit pump through said through opening.10. The fuel unit pump assembly according to claim 8 , wherein said engine mounting fastener comprise a centering bolt.11. The fuel unit pump assembly according to claim 8 , wherein the isolator body comprises two through holes configured to receive pump mounting fasteners and spaced apart by a distance substantially equal to the distance between two through holes for engine mounting fasteners.12. The fuel unit ...

NITRIDED COMPONENT SURFACE REPAIR WITH AUTOFRETTAGE

A method for repairing a nitrided surface having a damaged area is disclosed. The method includes introducing the nitrided surface into a bath containing electroless material for a predetermined period of time. The method also includes coating the damaged area with a layer of the electroless material. Further the method subjects the layer to an autofrettage process. The electroless material is heat treated at a predetermined temperature for a predefined time. 1. A method for repairing a nitrided surface having a damaged area , the method comprising:introducing the nitrided surface into a bath containing electroless material for a predetermined period of time;coating the damaged area with a layer of the electroless material;performing an autofrettage process on the layer; andheat treating the electroless material at a predetermined temperature for a predefined time.2. The method of claim 1 , wherein the autofrettage process includes:disposing the nitrided surface in a chamber;introducing autofrettage liquid at a predetermined pressure into the chamber;maintaining the predetermined pressure in the chamber for a first period of time;reducing the pressure in the bath after the first period of time has elapsed.3. The method of claim 2 , wherein the predetermined pressure is about 150 claim 2 ,000 psi.4. The method of claim 2 , wherein the first period of time ranges from 0.5 to 1.0 seconds.5. The method of claim 2 , wherein the pressure in the bath is reduced from the predetermined pressure to an atmospheric pressure over a second period of time different from the first period of time.6. The method of claim 2 , wherein the pressure in the bath is reduced linearly.7. The method of claim 6 , wherein the second period of time ranges from about 1 hour to about 5 hours.8. The method of claim 1 , wherein the electroless material is configured to provide surface hardness between 60 and 70 HRC.9. The method of claim 1 , wherein the electroless material includes at least one of ...

GUIDE FOR PISTON OF HIGH-PRESSURE PUMP FOR VEHICLE

A guide for a piston of a high-pressure pump includes: an upper body and a lower body, a connection part integrally connecting the upper body and the lower body, and a seal molded by an insert injection between the upper body and the lower body while surrounding the connection part. A gap exists between the upper body and the lower body, and the piston and the seal are in close contact with a piston. Therefore, it is possible to prevent leakage of fuel even while securing motion performance of the piston. 1. A guide for a piston of a high-pressure pump , the guide comprising:an upper body and a lower body having a cylindrical shape;a plurality of connection parts integrally formed on the upper body and the lower body to connect the upper body to the lower body; anda seal provided in a space between the upper body and the lower body in a structure of surrounding the connection part.2. The guide for the piston of the high-pressure pump of claim 1 ,wherein piston holes into which the piston is inserted are formed in the upper body and the lower body, respectively, andwherein diameters of the piston holes are formed such that a gap exists between an inner circumferential surface of each of the piston holes and an outer circumferential surface of the piston.3. The guide for the piston of the high-pressure pump of claim 1 ,wherein the seal is formed with a piston hole into which the piston is inserted, andwherein an inner circumferential surface of the piston hole is in close contact with an outer circumferential surface of the piston.4. The guide for the piston of the high-pressure pump of claim 1 ,wherein the seal is formed with connection part holes of a same number as a number of the connection parts, andwherein each of the connection parts is inserted into one of the connection part holes.5. The guide for the piston of the high-pressure pump of claim 1 ,wherein the seal has a side groove in a side surface thereof, andwherein a plate spring pushing an inner wall ...

HIGH PRESSURE PUMP

A high pressure fuel pump unit includes a pump head where an inlet channel opens into a low-pressure chamber itself in fluid communication with a compression chamber. A valve is arranged so that when it is closed the fuel fills the low-pressure chamber and when the valve opens the fuel flows from the low-pressure chamber into the compression chamber. The pump head also includes a resilient member arranged so that when the valve is closed, the resilient member deforms to increase the volume of the low pressure chamber. When the valve opens, the fuel flows into the compression chamber, pushed by the resilient member which takes back its original shape. 18-. (canceled)9. A high pressure fuel pump unit comprising:a pump head with an inlet channel which opens into a low-pressure chamber, the low-pressure chamber being in fluid communication with a compression chamber;a valve which controls the fluid communication between the low-pressure chamber and the compression chamber so that when the valve is closed, fuel fills the low-pressure chamber and when the valve is open, fuel flows from the low-pressure chamber into the compression chamber; anda resilient member arranged so that when the valve is closed, the resilient member deforms, thereby increasing the volume of the low-pressure chamber and when the valve is open, fuel flows into the compression chamber pushed by the resilient member which takes back its shape prior to being deformed to increase the volume of the low-pressure chamber.10. A pump unit as set in wherein the low-pressure chamber has a plurality of peripheral walls claim 9 , the resilient member being one of the plurality of peripheral walls.11. A pump unit as set in wherein the low-pressure chamber is defined within a top cap fixed to the pump head claim 10 , the top cap having a transversal top wall and a cylindrical wall extending away from the transversal top wall to the pump head claim 10 , the resilient member being the transversal top wall.12. A pump ...

SLIDING MEMBER

Provided is a sliding member having a steel back metal layer and a sliding layer. The sliding layer includes a resin composition and a porous sintered layer including Fe or Fe alloy phase particles and a Ni—P alloy phase functioning as a binder. The steel back metal layer is made of a carbon steel including 0.05 to 0.3 mass % carbon and includes a ferrite phase and a pearlite phase. A central portion in a thickness direction of the steel back metal layer includes not greater than 30 volume % of the pearlite phase. The steel back metal layer includes a high pearlite phase portion in its surface facing the sliding layer. The high pearlite phase portion includes not less than 50 volume % of the pearlite phase. 1. A sliding member comprising:a steel back metal layer; anda sliding layer on the steel back metal layer, the sliding layer including a porous sintered layer and a resin composition, the porous sintered layer including a Ni—P alloy phase and particles of an Fe or Fe alloy phase, the Ni—P alloy phase functioning as a binder for binding the Fe or Fe alloy phase particles with one another or binding the Fe or Fe alloy phase particles with the steel back metal layer;wherein the steel back metal layer is made of a carbon steel including 0.05 to 0.3 mass % carbon and has a structure consisting essentially of a ferrite phase and a pearlite phase;wherein a central portion in a thickness direction of the steel back metal layer includes not greater than 30 volume % of the pearlite phase; andwherein the steel back metal layer includes a high pearlite phase portion in a surface of the steel back metal layer facing the sliding layer, the high pearlite phase portion including not less than 50 volume % of the pearlite phase.2. The sliding member according to claim 1 , wherein a volume ratio of the pearlite phase in the high pearlite phase portion is at least twice the volume ratio of the pearlite phase in the central portion in the thickness direction of the steel back metal ...

FUEL PUMP ASSEMBLY

A fuel pump assembly for pressurizing fuel such as dimethyl ether (DME). The fuel pump assembly includes a plunger assembly and a pump block defining a pumping chamber and a plunger assembly cavity in communication with the pumping chamber. The plunger assembly is movable at least partially in the plunger assembly cavity towards and from the pumping chamber. The fuel pump assembly includes a metering valve and a suction channel located between the metering valve and the pumping chamber in an intended direction of flow of the fuel, wherein the fuel pump assembly comprises a leakage return conduit, with a first leakage return conduit opening in fluid communication with said plunger assembly cavity, adapted to return fuel that has leaked from the pumping chamber. The leakage return conduit includes a second leakage return conduit opening located in the suction channel. 1. A fuel pump assembly for pressurizing fuel , the fuel comprising a high-volatility fuel , such as dimethyl ether (DME) , the fuel pump assembly comprising a plunger assembly and a pump block defining a pumping chamber and a plunger assembly cavity in communication with the pumping chamber , the plunger assembly being movable at least partially in the plunger assembly cavity towards and away from the pumping chamber , wherein the fuel pump assembly comprises a metering valve and a suction channel located between the metering valve and the pumping chamber in an intended direction of flow of the fuel , wherein the fuel pump assembly comprises a leakage return conduit , with a first leakage return conduit opening in fluid communication with the plunger assembly cavity , adapted to return fuel that has leaked from the pumping chamber , wherein the leakage return conduit comprises a second leakage return conduit opening located in said suction channel , wherein wherein the pumping chamber assumes a minimum volume when the plunger assembly is at a top position and wherein the pumping chamber assumes a ...

Motor Vehicle Fuel Pump Cover, Motor Vehicle Fuel Pump Having Such a Cover, and Method for Producing Said Cover

A motor vehicle fuel pump cover is provided for covering a fuel guide region of a motor vehicle fuel pump by way of a cover housing. A phase change core is received in the cover housing. The phase change core is designed to change the phase state thereof while receiving thermal energy from the fuel guide region. The phase change core is designed for phase change at a temperature of more than 60° C. 1. A motor vehicle fuel pump cover for covering a fuel guide region of a motor vehicle fuel pump , comprising:a cover housing; anda phase change core accommodated in the cover housing, whereinthe phase change core is designed to change its phase state taking up thermal energy from the fuel guide region, andthe phase change core is designed for phase change at a temperature of more than 60° C.2. The motor vehicle fuel pump cover as claimed in claim 1 , whereinthe cover housing surrounds the phase change core partially or completely.3. The motor vehicle fuel pump cover as claimed in claim 2 , whereinthe cover housing is made of a closed-pore foam.4. The motor vehicle fuel pump cover as claimed in claim 1 , whereinthe phase change core comprises wax or paraffin.5. A motor vehicle fuel pump claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a motor vehicle fuel pump cover as claimed in ; and'}a fuel guide region of the motor vehicle fuel pump having an outer surface, whereinin an intended mounted state, the cover housing has an inner surface facing toward the motor vehicle fuel pump, andthe outer surface and the inner surface delimit a hollow space, whereinthe phase change core is arranged in the hollow space.6. The motor vehicle fuel pump as claimed in claim 5 , whereinthe cover housing is connected in a form-fitting manner to the motor vehicle fuel pump.7. A method for producing a motor vehicle fuel pump cover claim 5 , the method comprising the steps of:providing a phase change core, wherein the phase change core changes its phase state taking up ...

PULSATION DAMPER AND HIGH-PRESSURE FUEL PUMP

A pulsation damper () includes a first diaphragm () and a second diaphragm () having a first pressure-receiving film portion () and a second pressure-receiving film portion () and defining a gas chamber () between the first pressure-receiving film portion () and the second pressure-receiving film portion () and an annular attachment member () configured to support the first diaphragm () and the second diaphragm (). Pressure receiving areas (A A) of the first pressure-receiving film portion () and the second pressure-receiving film portion () are different from each other. The annular attachment member () includes a large-diameter annular support portion () formed so as to surround the first pressure-receiving film portion () and to support the first diaphragm (); a small-diameter annular support portion () formed so as to surround the second pressure-receiving film portion () and to support the second diaphragm (); and an annular coupling portion () configured to couple the large-diameter annular support portion () with the small-diameter annular support portion () so as to close the gas chamber (). 1. A pulsation damper comprising:a first diaphragm including a first pressure-receiving film portion displaced upon receipt of a pressure;a second diaphragm including a second pressure-receiving film portion displaced upon receipt of a pressure, the second pressure-receiving film portion having a pressure receiving area different from a pressure receiving area of the first pressure-receiving film portion; andan annular attachment member configured to support the first diaphragm and the second diaphragm from outer peripheral sides of the first and the second pressure-receiving film portions,the annular attachment member includinga large-diameter annular support portion surrounding the first pressure-receiving film portion and supporting the first diaphragm,a small-diameter annular support portion surrounding the second pressure-receiving film portion and supporting the ...

HIGH-PRESSURE PLUNGER PUMP AND METHOD FOR THE FUNCTIONAL INTERRUPTION OF A FLUID FLOW

A high pressure plunger pump, having at least one plunger arrangement which comprises a working space connected to a valve seat suction line and a valve seat pressure line, in which a plunger is arranged in an axially reciprocable manner, wherein the valve seat pressure line is closeable by a pressure valve and the valve seat suction line by a suction valve, and the suction valve can be kept in an open position in a controlled manner as required by means of a counter-pressure device, is designed so that the counter-pressure device has a supply line via which a control fluid can be guided to the suction valve for keeping the suction valve open, wherein a low-pressure pump is connected to the supply line for generating pressure of the control fluid. 1. High-pressure plunger pump , having at least one plunger arrangement which has a working space connected to a valve seat suction line and a valve seat pressure line , in which a plunger is arranged in an axially reciprocable movable manner , wherein the valve seat pressure line is closeable by a pressure valve and the valve seat suction line by a suction valve , and the suction valve can be kept in an open position in a controlled manner as required by means of a counter-pressure device , wherein the counter-pressure device has a supply line via which a control fluid can be guided to the suction valve for keeping open the suction valve , wherein a low-pressure pump is connected to the supply line for generating pressure of the control fluid.2. High-pressure plunger pump according to claim 1 , wherein a control valve is provided upstream of the low pressure pump and a shut-off valve is provided upstream of a hydraulic consumer which is in connection with the valve seat pressure line claim 1 , which are simultaneously closeable for the functional interruption of a fluid flow emerging from the hydraulic consumer.3. High-pressure plunger pump according to claim 1 , wherein the control valve and the shut-off valve can be ...

EXTERNAL FUEL PUMP AND VALVE SEAT FOR THE FUEL PUMP

An external fuel pump and a valve seat for the fuel pump are provided. The valve seat includes a valve body. One side of the valve seat body is provided with an installation chamber for installing a valve body, and the other side of the valve seat body is an oil separator. The oil separator is connected to an outer wall of the installation chamber. The external fuel pump includes the valve seat and a fuel chamber constituted by a housing and a cover. The valve seat body is located in the fuel chamber, the oil separator of the valve seat body is located at a lower portion of an exhaust port provided on the cover. An anti-flip mechanism is provided between the exhaust port and the oil separator. The valve seat is multi-functional and convenient to install with less space and fewer components, which reduces costs. 1. A valve seat for a fuel pump , comprising a valve seat body , wherein a first side of the valve seat body is provided with an installation chamber for installing a valve body , a second side of the valve seat body is an oil separator , and the oil separator is connected to an outer wall of the installation chamber.2. The valve seat of claim 1 , wherein an edge of the oil separator is provided with an oil baffle arranged upward claim 1 , and the oil baffle is provided with a first oil outlet.3. The valve seat of claim 1 , wherein the installation chamber is an installation groove having a cavity claim 1 , and a side of the installation groove is provided with a second oil outlet.4. The valve seat of claim 3 , wherein an upper wall of the second oil outlet has a second separator extending outside the installation groove.5. The valve seat of claim 3 , wherein the first oil outlet and the second oil outlet are provided on opposite sides of the valve seat body.6. The valve seat of claim 1 , wherein the oil separator is fan-shaped claim 1 , and two sides of the oil separator gradually expand from a connection portion with the installation chamber to an outermost ...

EVAPORATED FUEL PROCESSING DEVICE

Recirculation piping that recirculates fuel discharged from a fuel pump to an intake side of a fuel pump in a fuel tank is provided. In addition, a canister is formed with a heat transfer surface that guides fuel flowing through the fuel tank during actuation of the fuel pump. When the recirculation piping recirculates the fuel discharged from the fuel pump into the fuel tank, the heat transfer surface transfers heat between the canister and the fuel discharged from the fuel pump among fuel in the fuel tank. 1. An evaporated fuel processing device comprising:a fuel pump;an absorber that is mounted in a fuel tank and absorbs evaporated fuel generated in the fuel tank;a purge mechanism in which the evaporated fuel is introduced from the absorber into an intake pipe of an internal combustion engine; anda recirculation mechanism that recirculates fuel discharged from the fuel pump to an intake side of the fuel pump in the fuel tank is provided, whereina portion of an intake passage of the fuel pump is formed in the absorber,the absorber is formed with a heat transfer surface that guides fuel flowing through the fuel tank during actuation of the fuel pump, andwhen the recirculation mechanism recirculates the fuel that is discharged from the fuel pump into the fuel tank, the heat transfer surface transfers heat between the absorber and the fuel that contains the fuel that is discharged from the fuel pump and flows in a direction to be suctioned to the fuel pump among fuel in the fuel tank.2. (canceled)3. The evaporated fuel processing device according to claim 1 , wherein the recirculation mechanism includes recirculation piping in the fuel tank claim 1 , the recirculation piping being configured to recirculate the fuel that is discharged from the fuel pump to an intake passage on an upstream side of the absorber.4. The evaporated fuel processing device according to claim 3 , wherein the recirculation piping recirculates the fuel that is discharged by the fuel pump to an ...

Cam follower roller device

The cam follower roller device comprises a body, a shaft mounted on the body, and a roller mounted on the said shaft in a rotationally movable manner and comprising two end faces. Each of the said faces is arranged at least in part axially facing an inner wall of the body. At least one of the end faces of the roller and/or at least one of the said inner walls of the body comprise an antifriction and wear-resistant coating.

Cam follower roller device

The cam follower roller device including a body, a shaft mounted on the body, a roller mounted on the shaft in a rotationally movable manner, and at least one friction element mounted on the shaft axially between the roller and the body. The friction element is separate from the body and from the roller.

FUEL SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINE

A fuel supply system for an internal combustion engine is provided. The fuel supply system includes a fuel tank, at least one fuel injector, a fuel supply line and a fuel return line. The fuel supply line is adapted to supply fuel from the fuel tank to the at least one fuel injector. The fuel supply line supplies the fuel via a first pump, a first filter module, a second pump, a second filter module, a third filter module and a third pump. The fuel return line is adapted to return the fuel from the at least one fuel injector to an inlet of the second filter module. The fuel returned from the at least one fuel injector and supplied to the second filter module facilitates in maintaining a consistent back pressure and removing debris from the fuel supply system. 1a fuel supply line adapted to supply fuel from a fuel tank to at least one fuel injector, the fuel supply line supplies the fuel via a first pump, a first filter module, a second pump, a second filter module, a third filter module and a third pump; anda fuel return line adapted to return the fuel from the at least one fuel injector to an inlet of the second filter module;wherein the fuel returned from the at least one fuel injector and supplied to the second filter module facilitates in maintaining a consistent back pressure and removing debris from the fuel supply system.. A fuel supply system for an internal combustion engine, the fuel supply system comprising: The present disclosure relates to fuel supply systems in engines and more specifically, to a fuel supply system in an internal combustion engine for providing consistent back pressure to fuel injectors.Internal combustion engines, for example diesel engines, employ a fuel injector back pressure regulator or a fuel injector return check valve for routing a fuel leakage back to a fuel tank. The fuel supplied to the fuel tank of the engine from a fuel pump installed at a fuel station contains debris or dirt that can in turn hamper the operation of diesel ...

Common rail multi-cylinder fuel pump with independent pumping plunger extension

A fuel pump for an internal combustion engine is provided comprising a barrel including a central bore having a longitudinal axis, a plunger disposed partially in the central bore and movable along the longitudinal axis, a spring retainer, a first coil spring having a proximal end in contact with a first section of the barrel and a distal end in contact with the spring retainer to urge the spring retainer into engagement with a tappet assembly, an extender element coupled to the plunger, and a second coil spring having a proximal end in contact with a second section of the barrel and a distal end in contact with the extender element to urge the plunger toward the spring retainer, wherein the extender element includes a counter-bore to couple the extender element to the plunger.

High-Pressure Fuel Pump

The present disclosure relates to fuel systems. Some embodiments of the teachings may include a fuel pump comprising: a pump piston having a longitudinal centerline; a camshaft with at least one cam; a roller tappet arranged between the pump piston and the cam; and a tappet body and a roller rotatably held on the roller tappet. The pump piston and the tappet body may be movement-coupled with regard to movements in directions parallel to the piston longitudinal centerline. The roller may be in contact with the cam. The longitudinal centerline may intersect a geometric axis of rotation of the roller. The tappet body defines a tappet body longitudinal centerline parallel to the piston longitudinal centerline. The tappet body longitudinal centerline, in a projected view oriented parallel to the geometric axis of rotation of the roller, runs with a lateral spacing to the piston longitudinal center line. 1. A fuel pump comprising:a pump piston having a longitudinal centerline;a camshaft with at least one cam;a roller tappet arranged between the pump piston and the cam; anda tappet body and a roller rotatably held on the roller tappet;wherein the pump piston and the tappet body are movement-coupled with regard to movements in directions parallel to the piston longitudinal centerline;the roller is in contact with the cam;the longitudinal centerline intersects a geometric axis of rotation of the roller; andthe tappet body defines a tappet body longitudinal centerline parallel to the piston longitudinal centerline and the tappet body longitudinal centerline in a projected view oriented parallel to the geometric axis of rotation of the roller, runs with a lateral spacing to the piston longitudinal center line.2. The fuel pump as claimed in claim 1 , wherein claim 1 , at least at top dead center and at bottom dead center of the roller claim 1 , in the projected view claim 1 , a contact zone between the cam and the roller is laterally spaced apart from the tappet body ...

HIGH-PRESSURE FUEL PUMP

A high-pressure fuel pump capable of reducing the number of components and decreasing the manufacturing cost by processing of a pump body is provided. The high-pressure fuel pump includes a metal damper, a pump body in which a damper housing that houses the metal damper is formed, a damper cover attached to the pump body, covering the damper housing, and holding the metal damper between the pump body and the damper cover, and a holding member fixed to the damper cover and holding the metal damper from a side opposite to the damper cover. The holding member is provided with an elastic portion that urges the pump body so that the metal damper is urged toward the damper cover. 1. A high-pressure fuel pump , comprising:a metal damper;a pump body in which a damper housing that houses the metal damper is formed;a damper cover attached to the pump body, covering the damper housing, and holding the metal damper between the pump body and damper cover; anda holding member fixed to the damper cover and holding the metal damper from a side opposite to the damper cover, whereinthe holding member is provided with an elastic portion for urging the pump body so that the metal damper is urged toward the damper cover.2. A high-pressure fuel pump , comprising:a metal damper;a pump body in which a damper housing that houses the metal damper is formed;a damper cover attached to the pump body, covering the damper housing, and holding the metal damper between the pump body and the damper cover; anda holding member fixed to the damper cover and holding the metal damper from a side opposite to the damper cover, whereinthe holding member is fixed to the damper cover by press fitting.3. The high-pressure fuel pump according to claim 2 , whereinthe holding member is provided with an elastic portion that urges the pump body so that the metal damper is urged toward the damper cover.4. The high-pressure fuel pump according to claim 1 , whereinthe holding member includes a bottom portion formed in ...

CAM FOLLOWER ROLLER DEVICE

The cam follower roller device provides a tappet body, a pin and a roller mounted on the pin. The tappet body provides holes for mounting pin ends of the pin on the tappet body. The device further provides one deformable ring disposed between each pin end of the pin and an inner wall of the associated hole of the tappet body. 1. A cam follower roller device comprising:a tappet body,a pin,a roller mounted on the pin, the tappet body having holes for mounting pin ends of the pin on the tappet body, andone deformable ring disposed between each pin end of the pin and an inner wall of the associated hole of the tappet body.2. The device according to claim 1 , wherein each deformable ring is secured to the tappet body.3. The device according to claim 1 , wherein an outer surface of each deformable ring is in radial contact with the inner wall of the associated hole of the tappet body.4. The device according to claim 1 , wherein a bore of each deformable ring is in radial contact with the associated pin end of the pin.5. The device according to claim 1 , further comprising one sleeve interposed between each pin end of the pin and the associated deformable ring.6. The device according to claim 5 , wherein each pin end of the pin is press-fitted into the associated sleeve.7. The device according to claim 5 , wherein each sleeve comprises at least one tubular portion interposed between each pin end of the pin and the associated deformable ring.8. The device according to claim 7 , wherein each sleeve further comprises a radial flange connected to the tubular portion and extending radially outwards claim 7 , the radial flange being axially located on the side opposite to the roller with respect to the tappet body.9. The device according to claim 8 , wherein the radial flange of each sleeve extends one end of the tubular portion.10. The device according to claim 8 , wherein the radial flange of each sleeve axially comes into contact with at least one of the associated deformable ...

FUEL SUPPLY PUMP

An object of the invention is to provide a fuel supply pump that improves the lubricity of a plunger that reciprocates on the inner circumference of a cylinder in order to suppress sticking of the plunger that may occur with increasing pressure of fuel. A fuel supply pump includes a plunger that reciprocates in an inner peripheral portion of a cylinder, and a pressurizing chamber that is pressurized by the plunger. An annular groove is formed on an outer periphery of the plunger. The annular groove is located closer to the pressurizing chamber than an axial center position of a cylinder sliding region at the bottom dead center position. 1. A fuel supply pump , comprising:a plunger that reciprocates in an inner peripheral portion of a cylinder; anda pressurizing chamber that is pressurized by the plunger,wherein an annular groove is formed on an outer periphery of the plunger, andwherein the annular groove is located closer to the pressurizing chamber than an axial center position of a cylinder sliding region at a bottom dead center position.2. The fuel supply pump according to claim 1 , wherein only one annular groove is formed on an outer peripheral portion of the plunger.3. The fuel supply pump according to claim 2 , wherein the annular groove is located at a bottom dead center position between an axial center position of a plunger sliding region and the axial center position of the cylinder sliding region.4. The fuel supply pump according to claim 2 , wherein the annular groove has a first tapered surface inclined toward a side of the pressurizing chamber with respect to a radial direction and a second tapered surface inclined toward a side opposite to the pressurizing chamber with respect to the radial direction.5. The fuel supply pump according to claim 4 , wherein a crossing angle of the first tapered surface and a crossing angle of the second tapered surface with respect to an axial direction of the annular groove are within a range of 10° to 50°.6. The fuel ...

Piston Fuel Pump for an Internal Combustion Engine

A piston fuel pump for an internal combustion engine includes a pump cylinder, a pump piston, and a seal. The pump piston is configured to be moved axially in the pump cylinder, wherein a working chamber is delimited by the pump piston. The seal is disposed on the pump piston and seals off the working chamber from a low-pressure region. The seal seals off an end section of the pump piston adjacent to the working chamber from the working chamber. 1. A piston fuel pump for an internal combustion engine , comprising:a pump cylinder;a pump piston configured to be moved axially in the pump cylinder, wherein a working chamber is delimited by the pump piston; anda seal disposed on the pump piston and configured to seal off the working chamber from a low-pressure region,wherein the seal seals off an end section of the pump piston adjacent to the working chamber from the working chamber.2. The piston fuel pump as claimed in claim 1 , wherein the seal is applied directly to the pump piston via an injection molding method.3. The piston fuel pump as claimed in claim 1 , wherein:the seal includes a recess having an inner contour;the end section of the pump piston adjacent to the working chamber is arranged in the recess.4. The piston fuel pump as claimed in claim 1 , wherein:the seal includes a recess having an inner contour; andthe recess is filled by the end section of the pump piston adjacent to the working chamber.5. The piston fuel pump as claimed in claim 1 , wherein the end section of the pump piston adjacent to the working chamber and the seal are in positive engagement with each other.6. The piston fuel pump as claimed in claim 1 , wherein:the end section of the pump piston adjacent to the working chamber includes a first surface structure;the seal includes a second surface structure; andthe first surface structure and the second surface structure are at least one of complementary to each other and engage in each other.7. The piston fuel pump as claimed in claim 6 , ...

Nitrided component surface repair

A plunger for fuel injection assembly is provided. The plunger includes a nitrided surface. The nitrided surface includes a damaged area. An electroless material is coated on the damaged area.

FUEL PUMP

A fuel pump for conveying fuel includes a conveying unit having a cylinder, a plunger received in the cylinder, a pump spring received in the cylinder, an inner sleeve connected to the plunger, an outer sleeve in contact with the pump spring and in contact with a roller of a cam mechanism, and a locking bolt configured to detachably connect the inner and outer sleeves. 1. A fuel pump for conveying fuel , comprising a conveying unit including a cylinder , a plunger received in the cylinder , a pump spring received in the cylinder , an inner sleeve connected to the plunger , an outer sleeve in contact with the pump spring and in contact with a roller of a cam mechanism , and a locking bolt configured to detachably connect the inner and outer sleeves.2. The fuel pump of claim 1 , wherein the inner and outer sleeves are connected to one another in a base position of the locking bolt claim 1 , and the inner and outer sleeve are detached from one another in a rest position of the locking bolt.3. The fuel pump of claim 2 , further comprising a locking spring configured to bias the locking bolt in a direction of the base position claim 2 , said locking spring capable of being acted upon by engine oil under pressure such that the locking spring is pushed into the inner sleeve and the locking bolt is moved to the rest position claim 2 , when a force applied on the locking spring by the pressure of the engine oil exceeds a limit value to thereby cause a detachment between the inner and outer sleeves.4. The fuel pump of claim 1 , wherein the conveying unit is configured to deliver fuel only when the inner and outer sleeves are connected to one another claim 1 , and to interrupt delivery of fuel when the inner and outer sleeves are detached from one another.5. The fuel pump of claim 1 , wherein the piston moves in the cylinder at a delivery stroke claim 1 , a level of which is variable by the cam mechanism.6. An injection system for a combustion engine claim 1 , comprising:a ...

Roller pin for cam actuated roller assembly

The present disclosure provides a roller pin for a fuel pump. The roller pin includes a cylindrical body made of a first material extending between a first end and a second end. The roller pin includes an intermediate portion disposed between the first end and the second end of the cylindrical body. The intermediate portion is formed by depositing a second material on the cylindrical body. The roller pin further includes a longitudinal groove extending along the intermediate portion.

HIGH-PRESSURE PUMP

In a high-pressure pump, a center of load in a virtual plane including an end face of a coil spring facing a pressurizing chamber in an axial direction is defined as an upper load center, and a center of load in a virtual plane including an end face of the coil spring facing a cam in the axial direction is defined as a lower load center. The coil spring is configured such that, when viewed in the axial direction, during motion of a plunger toward the pressurizing chamber by rotation of the cam, the upper load center moves in one direction along a circumference of the coil spring while the lower load center moves in an opposite direction along the circumference of the coil spring, and the lower load center substantially coincides with the upper load center and subsequently further moves in the opposite direction. 1. A high-pressure pump for pressurizing and supplying a fuel to an internal combustion engine , comprising:a cylinder including a cylinder cylindrical portion having a cylindrical shape;a plunger having a rod shape and having one end disposed to be reciprocable inside the cylinder cylindrical portion, the plunger defining a pressurizing chamber for pressurizing the fuel between an outer wall of the one end and an inner wall of the cylinder; anda coil spring formed of a wire wound in a coil shape and disposed radially outward of another end of the plunger, the coil spring urging the other end of the plunger away from the pressurizing chamber and being capable of pressing the other end of the plunger against a cam of a driven shaft of the internal combustion engine, whereina center of load in a virtual plane including an end face of the coil spring facing the pressurizing chamber in an axial direction is defined as an upper load center, and a center of load in a virtual plane including an end face of the coil spring facing the cam in the axial direction is defined as a lower load center,the coil spring is configured such that when viewed in the axial ...

HIGH-PRESSURE FUEL SUPPLY PUMP

The damper mechanism used for a high-pressure fuel supply pump is configured so that an outer circumferential surface of a cover in regard to the thickness direction of the base material of the cover engages with the inner circumference of an open end part of a bottomed tubular concave part formed in a damper housing or in a pump housing of the high-pressure fuel supply pump. The total height of the damper as a low-pressure pulsation reducing mechanism can be reduced, and the dimensions of the damper in the radial directions can also be reduced. In cases where the damper mechanism is formed integrally with the high-pressure fuel supply pump, the total height of the high-pressure fuel supply pump can be reduced and the dimensions of the damper part in the radial directions can also be reduced. 1. A fuel supply pump comprising:a pressurizing chamber formed in a pump housing;a low-pressure fuel chamber that is formed in fluidly upstream side of the pressurizing chamber, the low-pressure fuel chamber formed in a bottomed tubular part;a damper that is stored in the low-pressure fuel chamber; anda damper cover that is mounted over the damper with a damper holder sandwiched between the damper cover and the damper, wherein the damper cover is arranged in a tubular part of the low-pressure fuel chamber so that an outermost edge of the damper cover engages with an inner circumference of the tubular part of the low-pressure fuel chamber.2. The fuel supply pump according to claim 1 , whereinan annular welding portion joins the outermost edge of the damper cover and the inner circumference of the tubular part of the low-pressure fuel chamber.3. The fuel supply pump according to claim 2 , whereinthe annular welding portion is exposed upward of the damper cover.4. The fuel supply pump according to claim 1 , wherein an upper edge part that is in an annular contact with the damper cover;', 'a lower edge part that is in an annular contact with the damper;', {'b': '91', 'i': 'b', 'a ...

ENGINE STOPPING DEVICE

There is provided an engine stopping device including a stopping solenoid, where an operating shaft, interlocked to a control rack of a fuel injection pump, is rotatably supported by an engine case in a pass-through manner. The control rack is forcibly movable to a stopping position by an action of the stopping solenoid on an operation arm provided for a projecting portion of the operating shaft in an integrally rotatable manner. An extending-retracting rod of the stopping solenoid and the operation arm are interlocked by fitting engagement between a pin provided for the extending-retracting rod and a cut-out portion of the operation arm. The cut-out portion is configured in a shape elongated along a direction perpendicular to a movement trajectory of the extending-retracting rod. 1. An engine stopping device ,wherein an operating shaft interlockingly coupled to a control rack of a fuel injection pump is rotatably supported by an engine case in a pass-through manner, and the control rack is forcibly movable to a stopping position by an action of a stopping solenoid on an operation arm provided for a projecting portion of the operating shaft in an integrally rotatable manner, andan extending-retracting rod of the stopping solenoid and the operation arm are interlocked by fitting engagement between a pin provided for one of the extending-retracting rod and the operation arm with one of a hole and a cut-out portion provided for the other of the extending-retracting rod and the operation arm, the one of the hole and the cut-out portion is in a shape elongated along a direction intersecting a movement trajectory of the other of the extending-retracting rod and the operation arm.2. The engine stopping device according to claim 1 , whereinthe one of the hole and the cut-out portion is defined in the operation arm.3. The engine stopping device according to claim 2 , whereinthe one of the hole and the cut-out portion is a cut-out defined in a depressed manner along a ...

METHOD TO CONTROL AN ELECTROMAGNETIC ACTUATOR OF AN INTERNAL COMBUSTION ENGINE

Method to control an electromagnetic actuator of an internal combustion engine, in particular for a fuel pump of a direct-injection system; wherein the electromagnetic actuator is controlled by an electric current pulse of the Peak&Hold type, i.e. subdivided into a peak phase and a hold phase; the method includes acquiring the initial duration of the peak phase, during which a peak control current is to be supplied to the electromagnetic actuator to control the movement of a component of the electromagnetic actuator moving towards a position defined by a limit stop; and determining the duration of the peak phase by progressively decreasing the initial duration of the peak phase by a first change. 1. A method to control an electromagnetic actuator of an internal combustion engine , in particular for a fuel pump of a direct-injection system; wherein the electromagnetic actuator is controlled by an electric current pulse of a Peak&Hold type subdivided into a peak phase and a hold phase; for each actuation of the electromagnetic actuator the method comprises:acquiring an initial duration of the peak phase, during which a peak control current is to be supplied to the electromagnetic actuator to control a movement of a component of the electromagnetic actuator moving towards a position defined by a limit stop and acquiring a duration of the hold phase during which a hold control current is to be supplied to the electromagnetic actuator to maintain the component of the electromagnetic actuator in the position defined by the limit stop;determining an effective duration of the peak phase by progressively decreasing the initial duration of the peak phase by a first change of duration, andsupplying the peak control current to the electromagnetic actuator for the peak phase to control the movement of the component of the electromagnetic actuator moving towards the position defined by the limit stop and supplying the hold control current to the electromagnetic actuator for the ...

DIAPHRAGM DAMPER DEVICE COILED WAVE SPRING AND DAMPER SYSTEM

A coiled wave spring used by a diaphragm damper device and arranged in a fuel chamber defined by a housing and a cover is provided. The coiled wave spring is configured to be arranged between a diaphragm damper of the diaphragm damper device and the cover. The coiled wave spring is configured to fix the diaphragm damper to the housing with its elastic force. The coiled wave spring includes a coil portion, a winding initiation portion, and a winding termination portion. The winding initiation portion and the winding termination portion form flat seat windings. The seat windings each have a larger outer diameter than the coil portion. One of the seat windings is configured to be fixed to the diaphragm damper. 1. A coiled wave spring used by a diaphragm damper device and arranged in a fuel chamber defined by a housing and a cover , whereinthe coiled wave spring is configured to be arranged between a diaphragm damper of the diaphragm damper device and the cover,the coiled wave spring is configured to fix the diaphragm damper to the housing with its elastic force, andthe coiled wave spring includes a coil portion, a winding initiation portion, and a winding termination portion, wherein the winding initiation portion and the winding termination portion form flat seat windings, the seat windings each have a larger outer diameter than the coil portion, and one of the seat windings is configured to be fixed to the diaphragm damper.2. The coiled wave spring according to claim 1 , wherein one of the seat windings is configured to be fixed to the diaphragm damper claim 1 , and the other one of the seat windings is configured to be fixed to a coupling member attached to an inner side of the cover.3. The coiled wave spring according to claim 1 , wherein each of the seat windings is configured to be fixed to the diaphragm damper or a coupling member by swaging the diaphragm damper or the coupling member.4. A damper system comprising:a cover coupled to a housing, wherein the cover ...

System and Method for Lubricating a Cryogenic Pump

A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank. 1. A cryogenic LNG fuel system comprising:a tank for storing LNG, the tank defining a chamber;a LNG fill system including a LNG inlet passage in communication with the tank for directing a flow of LNG into the chamber;a cryogenic pump in fluid communication with the chamber, the cryogenic pump including a pumping element at least partially immersed in the LNG, the pumping element including a plunger adapted for reciprocating movement in a barrel chamber adapted to receive LNG so as to produce a pumping action that directs the LNG from the barrel chamber out of the tank, the pumping element including a seal arranged between the plunger and an inside wall of the barrel chamber; anda lubricant system including a lubricant reservoir for storing a supply of a lubricant and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage, the lubricant system being adapted to introduce the lubricant via the lubricant inlet passage into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank wherein the lubricant lubricates the pumping element and the seal.2. The cryogenic LNG fuel system of wherein the ...

FUEL SUPPLY DEVICE OF ENGINE

A fuel supply device of an engine is provided, which has high versatility irrespective of specifications of the engine, and thus easily achieves economies of mass production, and has high cost-effectiveness even in the engine of small-lot production. The fuel supply device of the engine comprises a high pressure fuel pump that raises pressure of fuel and discharges the fuel, a plurality of fuel injectors, and a fuel supply piping that distributes the fuel discharged from the high pressure fuel pump to the fuel injectors. The fuel supply piping includes a plurality of sockets that are connected to the fuel injectors respectively, a junction pipe that connects adjacent sockets among the plurality of sockets, and a stay that integrally connects the plurality of sockets and fixes the plurality of sockets to a main body of the engine. 1. A fuel supply device of an engine , comprising:a fuel pump raising pressure of fuel and discharging the fuel;a plurality of fuel injectors; anda fuel supply piping distributing the fuel discharged from the fuel pump to the fuel injectors,wherein the fuel supply piping includesa plurality of sockets connected to the fuel injectors respectively,at least one junction pipe connecting adjacent sockets, anda stay integrally connecting the sockets and fixing the sockets to an engine main body.2. The fuel supply device of an engine according to claim 1 ,wherein the socket has a protruded portion on which the stay is fitted, andthe stay has a recessed portion with a U-shaped section fitted onto the protruded portion, and extending in a gutter shape.3. The fuel supply device of an engine according to claim 1 ,wherein the stay covers the junction pipe from outside.4. The fuel supply device of an engine according to claim 2 ,wherein the stay covers the junction pipe from outside. This application claims the benefit of priority of Japanese Patent Application No. 2015-238194, filed on Dec. 7, 2015, the entire contents of which are incorporated herein ...

Piston Pump

A piston pump, in particular a high-pressure fuel pump for an internal combustion engine, includes a pump housing, a pump piston, and a delivery chamber that is delimited at least by the pump housing and the pump piston. The piston pump further includes a seal configured to seal the delivery chamber and a separate guide element configured to guide the pump piston. The seal and the guide element are arranged between the pump piston and the pump housing. The seal is formed as a plastic ring with a substantially sleeve-shaped base portion. 1. A piston pump , comprising:a pump housing;a pump piston;a conveying space delimited at least by the pump housing and the pump piston;a seal configured to seal off the conveying space; anda separate guide element configured to guide the pump piston,wherein the seal and the guide element are arranged between the pump piston and the pump housing, and wherein the seal is configured as a plastic ring with a substantially sleeve-shaped base portion.2. The piston pump as claimed in claim 1 , wherein a fastening ring for the seal is arranged between the pump housing and the pump piston.3. The piston pump as claimed in claim 2 , wherein a spring element claim 2 , which pushes the seal against the fastening ring claim 2 , is arranged between the pump piston and the pump housing.4. The piston pump as claimed in claim 1 , further comprising a further guide element arranged in a seal carrier of the piston pump.5. The piston pump as claimed in claim 1 , wherein the seal has claim 1 , at one axial end claim 1 , a radially outwardly projecting web that is formed on the sleeve-like base portion so that the seal has an overall L-shaped cross-section.6. The piston pump as claimed in claim 5 , wherein the seal has claim 5 , at a second axial end claim 5 , a further radially outwardly projecting web that is formed on the sleeve-like base portion so that the seal has an overall U- or C-shaped cross-section.7. The piston pump as claimed in claim 6 , ...

Valve Arrangement

A valve arrangement for a high pressure pump includes a pump housing with a depression, and a valve housing configured to be inserted in the depression, and a clamping disc. The valve housing has at least one radial projection with a first axial boundary surface and a second axial boundary surface arranged opposite the first axial boundary surface, wherein the clamping disc extends radially over the radial projection of the valve housing and has a third axial boundary surface that corresponds with the second axial boundary surface of the valve housing. On the circumferential side, the clamping disc has a thread that can be screwed into a thread on the inner side of the depression to brace the valve housing onto the first boundary surface.

DIAPHRAGM DAMPER

Peripheral sections of two diaphragms are stacked on each other. The peripheral sections of the two diaphragms form an outer rim of a diaphragm damper. The outer rim is continuously sealed and joined by laser welding over the entire circumference of the outer rim. The thickness of the tip of the outer rim is set in correspondence with the spot diameter of a laser beam at the tip of the outer rim. A weld bead is formed by welding in the entire area of the tip of the outer rim. 1. A diaphragm damper comprising:two diaphragms; anda high-pressure chamber that is configured by the two diaphragms and retains a high-pressure gas in a sealed manner, whereinperipheries of the two diaphragms form an outer rim of the diaphragm damper, wherein the entire circumference of the outer rim is continuously sealed and joined by laser welding,a thickness of a tip of the outer rim is set in correspondence with a spot diameter of a laser beam at the tip of the outer rim, anda weld bead is formed by welding in the entire area of the tip of the outer rim.2. The diaphragm damper according to claim 1 , further comprising a first cover member and a second cover member claim 1 , which respectively support the two diaphragms claim 1 , whereinthe first and second cover members each have a clamping portion that clamps the periphery of the corresponding one of the two diaphragms, andthe clamping portion of the first cover member and the clamping portion of the second cover member each have an outer surface with a gradient, wherein the gradients are each set such that the thickness of the clamping portion decreases toward the tip of the clamping portion.3. The diaphragm damper according to claim 1 , wherein the peripheries of the diaphragms are stacked on each other, and', 'the stacked peripheries are clamped by the clamping portions of the first cover member and the second cover member, and, 'the two diaphragms are each covered by the corresponding one of the first cover member and the second ...