ПРИВОДНОЙ И КЛАПАННЫЙ УЗЕЛ ДЛЯ ФОРСУНКИ С ГИДРАВЛИЧЕСКИМ ПРИВОДОМ И ЭЛЕКТРОННЫМ УПРАВЛЕНИЕМ

Использование: в двигателестроении, в частности системах впрыска топлива с гидравлическим приводом и электронным управлением. Сущность изобретения: приводной и клапанный узел для насос-форсунки с гидроприводом и электронным управлением содержит привод с электропитанием, включающий подвижный элемент и тарельчатый клапан, присоединенный к подвижному элементу. Тарельчатый клапан имеет первую опорную поверхность и вторую опорную поверхность и может перемещаться вдоль оси между первым, вторым и третьим положениями. Узел также содержит приспособление для смещения тарельчатого клапана к его первому положению и приспособление для компенсации (распределения) несоосности первой и второй опорных поверхностей относительно оси. 15 з.п.ф-лы, 13 ил.

TOПЛИBHЫЙ HACOC BЫCOKOГO ДABЛEHИЯ

Привод топливного насоса высокого давления

Изобретение относится к двигателестроению и позволяет повысить точность регулирования установочного угла опережения впрыска топлива, для чего привод топливного насоса высокого давления, состоящий из ступицы 1 кулачкового вала и приводной шестерни 5, установленной коаксиально ступице 1 с возможностью поворота, дополнительно снабжен пазами, выполненными в шестерне 5, и отверстиями, выполненными в ступице 1. На наружной поверхности ступицы 1 выполнены зубья 18 для взаимодействия с зубчатым ключом, снабженным градуированной шкалой 15, выполненной по окружности с центром на оси ключа. 2 ил.

DICHTVORRICHTUNG EINES DRUCKVENTILS FUER EINE KRAFTSTOFFEINSPRITZEINHEIT

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.

Einspritzpumpe fuer Einspritz-brennkraftmaschinen

FUEL PUMP FOR AN INJECTION ENGINE AND PROCESS FOR PRODUCING IT

IC engine fuel injection pump cylinder by pass port - has cavitation impact-resistant disc with polished conical profile facing outside of port

The pump arrangement comprises a cylinder bush containing a piston with control profile(s), the cylinder wall being provided with a bypass post for each control profile, - which post mag at the same time, serve as an inlet post, and a cavitation resistant impact element being arranged outside the bush so that its hardened surface faces the post. The surface facing the post has an indented profile whose width increases, preferably conically, in the direction towards the post. The surface of the indentation is polished. The surface of the bottom of the conical identation preferably has a smaller diameter than that of the post.

Montageverfahren

Verfahren zur Montage einer sauggedrosselten hydrostatischen Pumpe (1) mit mehreren in einem Pumpengehäuse (6) aufgenommenen Pumpeinheiten (2a, 2b, 2c), deren Kolben (18) von einer Antriebswelle (4) angetrieben sind und die jeweils ein Saug- und ein Druckventil (28, 34) haben, über welche Druckmittel aus einer Saugleitung (40) ansaugbar und an einen Sammelkanal (38) abgebbar ist, gekennzeichnet durch die Schritte: - Vormontage mehrerer Pumpeinheiten (2a, 2b, 2c) mit Verdrängergehäuse (22), Saugventil (28) und ggf. Kolben (18) und Druckventil (34); - Prüfen mehrerer Pumpeinheiten (2a, 2b, 2c) vor der Montage ins Pumpengehäuse im Hinblick auf den jeweils erforderlichen Öffnungsdruck des Saugventils (28); - Auswahl von Pumpeinheiten (2a, 2b, 2c), deren Saugventilöffnungsdruck in einem vorbestimmten Druckintervall liegen und - Montage einer Gruppe ausgewählter Pumpeinheiten (2a, 2b, 2c) im Pumpengehäuse (6).

KRAFTSTOFFEINSPRITZPUMPE FUER BRENNKRAFTMASCHINEN

Flachdichtung

Die Erfindung betrifft eine Flachdichtung (1), insbesondere für eine Kraftstoffhochdruckpumpe, mit einer ersten Ausnehmung (2) für einen Zylinderkopf, einer zweiten Ausnehmung (3) für einen Hochdruckkanal und einer dritten Ausnehmung (4) für einen Ansaugkanal. Um die Ausnehmungen für den Hochdruckkanal sowie um die Ausnehmung um den Ansaugkanal herum sind jeweils eine erste beziehungsweise zweite Dichtsicke (5), (6) ausgebildet. Die Flachdichtung (1) weist eine weitere dritte Dichtsicke (7) auf, die derart gestaltet ist, dass sie die übrigen Dichtsicken umschließt.

Flachdichtung

Flachdichtung (1) mit mindestens – einer ersten Ausnehmung (2) für einen Zylinderkopf, – einer zweiten Ausnehmung (3) für einen Hochdruckkanal und – einer dritten Ausnehmung (4) für einen Ansaugkanal, wobei die Flachdichtung (1) wenigstens, – um die Ausnehmung (3) für den Hochdruckkanal herum eine erste Dichtsicke (5) aufweist, – um die Ausnehmung (4) für den Ansaugkanal herum eine zweite Dichtsicke (6) aufweist und – eine dritte Dichtsicke (7) aufweist, die die erste und zweite Dichtsicke (5), (6) umschließt. wobei eine Entlastungsöffnung (9) innerhalb der von der umschließenden Dichtsicke (7) liegenden Fläche eingebracht ist, und die Entlastungsöffnung (9) zum Abfließen von Flüssigkeit in eine Ablaufleitung (23) eines weiteren Bauteils vorgesehen ist.

Fuel injection system control process involves afterflow parameter being controlled in dependence on main flow parameter

The control process is for a system including a magnetic valve (7) to connect a fuel input (6) selectively to the high pressure cavity (1) between the pump and the injection valve (3). The pump, high pressure cavity and injection valve are in the form of a pump and jet unit and are fitted in the cylinder head (4) of the engine.

Fuel injection pumps for internal combustion engines

Improvements in and relating to fuel injection pumps for internal combustion engines

... 648,297. Fuel-injection pumps. PISCHINGER, A. Jan. 1, 1948, No. 75. Convention date, Jan. 9, 1947. [Class 102(i)] In a fuel-injection pump the' working space 4 of the pump is elastically limited by a resilient cell 11, which is inserted between the pump barrel 9 and the delivery valve casing 10. The hollow interior 13 is in communication through a passage 14 with the suction chamber 3. When the speed of the engine increases, the pressure in the working space increases causing the resilient cell to be depressed and thereby the working space to be increased with a corresponding reduction in delivery.

INJECTION UNIT

Improvements in or relating to injection pumps for internal combustion engines

... 392,491. Fuel-injection pumps. SOC. GENERALE DES CARBURATEURS ZENITH, 10, Rue Petitot, Geneva, Switzerland. Jan. 23, 1933, No. 2162. Convention date, Jan. 23, 1932. [Class 102 (i).] In a fuel-injection pump in which the plunger 33, Fig. 2, or a piston valve, is formed with a helical relief edge 26 and the plunger is rotated by means of a rack 46 and pinion 45 to vary the timing of release, the rotation is transmitted from the pinion to the plunger through a helical spring. The tappet return spring 49 may be employed for this purpose, one end of the spring being secured to the pinion and the other end to the tappet, to which the plunger is secured. Alternatively the plunger is rotated in the usual manner, as shown, by a pin 44 engaging slots in a sleeve carried by the pinion 45, and the spring 49 is employed for effecting axial adjustment of the plunger for varying the timing of injection. One end of the spring is secured to a pinion 47 rotated by a rack 48 and the other end is secured to ...

Tappet and plunger assembly adapted for a fluid injection pump

A tappet and plunger assembly (40, 42) adapted for a fluid injection pump, such as unit fuel injector. The fuel pump plunger (40) is retained directly to the tappet (42) by a flexible member such as an elastomeric o-ring (82). If the plunger seizes in its housing bore (50), the flexible member will sufficiently flex and/or fail thereby allowing the tappet to i) separate from the stationary plunger and ii) remain in contact with the mating component of the moving engine drive train causing reciprocation of the assembly. The arrangement helps prevent damage to the engine by engine drive train components if the plunger becomes seized. ...

A juncture for a high pressure fuel system

A juncture (13) and method for changing direction of fuel flow in a high pressure fuel injection system such as a common rail (10) and/or a fuel pump (140), the juncture comprising a body (14), a first passage (24) formed in the body having a first diameter and a longitudinal axis (16) extending therethrough, the first passage (24) including a groove (34) positioned along a portion of the longitudinal axis (16), and a second passage (26) formed in the body having a second diameter, a central axis (30) extending therethrough, and an opening, the opening of the second passage (26) being provided in the groove (34) of the first passage (24) to allow fluidic communication between the second passage (26) and the first passage (24) so that stresses at the juncture (13) caused by high pressure fuel changing direction of flow is reduced.

Multi-cylinder fuel injection pump for an internal combustion engine

The housing, which is closed at the side, of the fuel injection pump embodied as in-line injection pump has receiving bores, discharging into a camshaft chamber, for in-line tappets and pump elements, the pump pistons of which are rotatable in order to vary the effective supply stroke by means of regulating sleeves provided with guide arms. A governor rod guided in a longitudinal recess of the pump housing engages the guide arms. For the removal and installation of the regulating sleeves, assembly recesses are machined into the receiving bores, beginning at the camshaft chamber and discharging into the longitudinal recess. The assembly recesses, one for each two adjacent receiving bores, are each embodied by means of a single aperture which interrupts the web of housing between the receiving bores. The resultant assembly recesses are located in the unloaded region between the tappets and enable an equally high peak load on the injection pump in both clockwise and counterclockwise operation ...

Delivery valves

Tappet and plunger assembley adapted for a fluid injection pump

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.

A DEVICE FOR A FUEL INJECTION PUMP

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. ...

Fuel injection pump especially for a diesel-powered internal-combustion engine

In a fuel injection pump a thrust- carrying piece 13 is directly braced against a planar and microfinished front face 12 of a piston guiding body 2, whereby a valve closing body guided in the thrust-carrying piece 13 with its planar sealing surface 21 in the rest position is directly seated on the front face of the piston guiding body 2. In case of repairs thus the high- pressure sealing surfaces between the thrust-carrying piece 13 and the piston guiding body 2 and the valve face can time-savingly be re-worked in a single working step. ...

FUEL INJECTION PUMPS

... 1380722 Fuel injection pumps BRYCE BERGER Ltd 14 April 1972 [23 April 1971] 10919/71 Heading F1A In a fuel injection pump having a delivery valve 16 movable in the bore 14 of a flanged member 15 closing the end of the cylinder barrel 11, a circlip 19 is disposed in a groove in the wall of the bore 14 to prevent the fluted guide portion 17 of the valve entering the pumping chamber should it become detached from its head 18.

FUEL-INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES

HYDRAULIC HEAD FOR AN INJECTION PUMP

... 1479030 Fuel injection pumps SIGMADIESEL 4 Sept 1974 [12 Sept 1973] 38732/74 Heading F1A In a fuel injection pump having a cylinder 2 provided with combined inlet and spill orifices 7, fuel which spills through the orifices 7 impinges on a split cylindrical ring 11 of resilient material such as hardened and tempered steel. Fuel leaving the orifices 7 escapes to low-pressure through orifices 10 in a sleeve 8 and apertures 13 provided in the ring 11 but axially spaced from the aligned orifices 7, 10. The ring is sprung into an annular groove 15 on the outer surface of the sleeve 8, the latter having a shoulder 8b against which the enlarged end 2a of the cylinder 2 is clamped by a delivery connector 3 containing a delivery valve 9 only the body of which is shown. To even out the erosion of the ring by the spilled fuel, the ring is free to rotate in the groove 15.

Improvements relating to liquid fuel injection pumps for internal combustion engines

... 565,383. Fuel-injection pumps. C.A,V;, Ltd., NICOLLS, W. E. W., and EVANS, F. M. May 4, 1943, No. 7053. [Class 102 (i)] A fuel-injection pump for an internal-combustion engine comprises a plunger barrel j within a cylinder c which is inserted in a bore d in a body part a and which has at its outer end a head e formed with slots g for bolts f to secure it to the body part, angular adjustment of the cylinder relative to the body part being effected by screws 5. A key n and slot o prevent rotation of the barrel relative to the cylinder. The slidable and rotatable plunger s extends beyond the barrel and is provided with a collar t with a groove 3 engaged by a projection 2 on a pinion u which is rotatable on the barrel by a slidable toothed rack v and which is provided with ball bearings z. The rack v has additional teeth engaged by a toothed segment 6 on a short shaft 7 movable angularly by a lever 8.

FUEL INJECTION PUMPING APPARATUS

... 1488872 Fuel injection pumps CAV Ltd 27 Dec 1974 [17 Jan 1974] 02259/74 Heading F1A In a rotary distributer fuel injection pump in which the rotary distributer member (not shown) rotates in a first housing part 10 located in the larger diameter end portion of a stepped bore in a second housing part 9 and an angularly adjustable cam ring 17 for reciprocating the radial pumping plungers is disposed in the smaller diameter bore portion, a circumferentially extending slot 46 for accommodating angular movement of a pin 45 fixed to the ring 17 is provided with an axial extension 47 whereby, prior to the fitting of the part 10 to the part 9, the ring can be tilted to permit the pin 45 to pass into the extension 47 whereafter the cam ring 17 can be aligned with the small diameter portion and moved axially thereinto. This method of assembly enables the pin 45 to be permanently secured to the ring by e.g. welding. A body (8) containing the piston (35) which moves the pin 45 is bolted to the housing ...

INJECTION PUMP

MEHRZYLINDER-KRAFTSTOFFEINSPRITZPUMPE FÜR BRENNKRAFTMASCHINEN

MEHRZYLINDER-KRAFTSTOFFEINSPRITZPUMPE FÜR BRENNKRAFTMASCHINEN

BRENNSTOFFEINSPRITZPUMPE FUR EINSPRITZBRENNKRAFTMASCHINEN

EINSPRITZPUMPE FUER DIESELMOTOREN, INSBESONDERE FUER MOTOREN, DIE MIT HOHEN EINSPRITZDRUECKEN ARBEITENDE MOTOREN

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

FUEL INJECTION PUMP FUER BRENNKRAFTMSCHINEN FUER A HIGH INJECTION PRESSURE

Assembly tool for an injection pump for internal-combustion engines

Injection pump

Ein Hochdruckmedium führendes Bauelement

In the case of a component which conducts high-pressure medium, comprising a first component (13) with at least one pressure duct (29) and a second component (2) with a pressure chamber (30), wherein an annular sealing surface (32), which surrounds the mouth(s) of the at least one pressure duct (29), of the first component (13) and an annular sealing surface (33), which surrounds the rim of the pressure chamber (30), of the second component (2) interact areally with one another to form a sealing point, wherein the cross-sectional area of the pressure duct (29) is smaller than the cross-sectional area of the pressure chamber (30), the pressure-induced radial expansion of the annular sealing surfaces (32, 33) is substantially equal.

PROCEDURE AND DEVICE FOR THE CULTIVATION OF AN INJECTION PUMP TO AN INTERNAL-COMBUSTION ENGINE.

FUEL INJECTION PUMP FUER INTERNAL-COMBUSTION ENGINES.

PUMPDUESE FUER THE FUEL INJECTION WITH INTERNAL-COMBUSTION ENGINES.

Fuel injection pump for internal-combustion engines

Injection pump

Injection pump for internal-combustion engines

Fuel injection pump

FUEL INJECTION PUMP FUR INJECTION INTERNAL-COMBUSTION ENGINES

PROCEDURE FOR THE CHANGE OF THE BEGINNING OF PROMOTION OF FUEL INJECTION PUMPS AND FUEL INJECTION PUMP

Fuel injection and firing device for internal-combustion engines

Injection pump for injection internal-combustion engines

LIQUID FUEL INJECTION PUMPING APPARATUS

LOCATING DEVICE

MOUNTING ARRANGEMENT FOR INJECTION BARREL IN HOUSING OF FUEL INJECTION PUMP

HIGH PRESSURE FEED PUMP

The high pressure feed pump (14) has a plunger cylinder (26) and a cylindrical p lunger piston (28) moved back and forth therein. The plunger cylinder (26) and the plun ger piston (28) delimit a feed space (24) which, in the case of a filling stroke (F) of the plun ger piston (28), can be connected via a filling valve (24) to a supply space for a feed medium. Furth ermore, in the case of a feed stroke (F') of the plunger piston (28), the feed space (24) can b e connected via a delivery valve (42) to a high pressure space. The plunger cylinder (26) is of es sentially rotationally symmetric design and is surrounded with a press fit by a pressure b ody (44). The external prestress exerted by the pressure body (44) on the plunger cylinder (26 ) relieves the latter of high stresses when the pump is to generate extremely high pressures.

Einspritzpumpenanlage für Brennkraftmaschinen.

Brennstoffeinspritzpumpe.

Einspritzpumpe.

Brennstoffeinspritzpumpe für Verbrennungskraftmaschinen.

Dichtungsvorrichtung an Kolbenmaschine.

Einspritzpumpe, insbesondere für Brennkraftmaschinen.

Treibstoffeinspritzpumpe für Brennkraftmaschinen.

Einspritzpumpe für Brennkraftmaschinen.

Einspritzpumpe mit Schiebersteuerung und Schrägkantenregelung.

Pompe d'injection de combustible pour moteur à combustion interne.

Einspritzpumpe für Brennkraftmaschinen

Einspritzpumpe für Brennkraftmaschinen

Brennstoffeinspritzpumpe.

Kolbensteuereinrichtung, insbesondere für Brennstoffeinspritzpumpen.

Einrichtung zur Erleichterung des Einbaues der Nockenwelle in eine Einspritzpumpe

Brennstoffpumpe für Einspritzbrennkraftmaschinen.

Brennstoffeinspritzpumpe

Brennstoffeinspritzpumpe für Verbrennungsmotoren

Kraftstoff-Einspritz- und Zündvorrichtung für Brennkraftmaschinen

Brennstoffpumpe

BRENNSTOFFPUMPE.

BRENNSTOFFPUMPE.

High-pressure fuel supply pump

Diesel high-pressure oil pump dismounting device and method

Novel automobile engine high -pressure oil pump installs base

Diesel engine injection pump lower part of body assembly part

Plunger type injection pump

The invention discloses a plunger type injection pump. The plunger type injection pump consists of a pump body, a plunger and barrel assembly, an oil outlet valve assembly, an oil outlet valve joint, a fuel control sleeve, a tappet body, a plunger spring, an oil outlet valve spring, a spring upper seat, a spring lower seat, an oil inlet joint and a connecting plate, and is characterized in that the pump body is mounted on an engine. According to the plunger type injection pump, as an original oil inlet pipe assembly formed by welding an oil inlet pipe joint and an oil inlet pipe is changed into an oil inlet pipe formed by directly bending pipes, the oil inlet pipe joint parts are eliminated, a welding process is eliminated, and the material cost and processing and manufacturing cost are obviously reduced. A fuel injection rule can be improved, and the performance of the engine is improved.

Mounting structure for high-pressure oil pump and engine

High-pressure pump

Fuel injection pump

POMPE D'INJECTION DE CARBURANT POUR MOTEURS A COMBUSTION INTERNE

A) POMPE D'INJECTION DE CARBURANT POUR MOTEURS A COMBUSTION INTERNE; B) POMPE CARACTERISEE EN CE QUE, POUR AJUSTER LA CARACTERISTIQUE DE DEBIT SANS SORTIR DES LIMITES DES TOLERANCES, LE POINTEAU 20 EST DISPOSE REGLABLE PAR RAPPORT AU CANAL 11, DU PISTON DE LA POMPE 3; C) L'INVENTION CONCERNE UNE POMPE D'INJECTION DE CARBURANT POUR MOTEURS A COMBUSTION INTERNE.

INJECTION GROUP ASSOCIATED WITH EACH OF THE CYLINDERS OF A MULTI-CYLINDER DIESEL ENGINE

FUEL INJECTION PUMP HAS RECIPROCATING PISTON

Fuel injection pump for internal combustion engines

Fuel injection pump

POMPE D'INJECTION DE CARBURANT POUR MOTEURS A COMBUSTION INTERNE AVEC POSITIONNEMENT DEFINITIF DE L'ORGANE DE REGLAGE DES QUANTITES DE CARBURANT INJECTES

A.POMPE D'INJECTION DE CARBURANT POUR MOTEURS A COMBUSTION INTERNE AVEC POSITIONNEMENT DEFINITIF DE L'ORGANE DE REGLAGE DES QUANTITES DE CARBURANT INJECTEES. B.POMPE CARACTERISEE EN CE QUE L'INSTALLATION DE POSITIONNEMENT EST UNE INSTALLATION DE FIXATION 27 PAR LAQUELLE, LORS D'UN ASSEMBLAGE POUR LA PREMIERE FOIS DES DEUX CARTERS 10, 23, LEUR DISPOSITION RECIPROQUE EST DETERMINEE ET ARRETEE, ET PEUT ETRE A NOUVEAU OBLIGATOIREMENT RETABLIE APRES UNE NOUVELLE SEPARATION EVENTUELLE DES CARTERS. C.L'INVENTION S'APPLIQUE A UNE POMPE D'INJECTION DE CARBURANT POUR MOTEURS A COMBUSTION INTERNE AVEC UN DISPOSITIF DE REGLAGE, DONT LE CARTER EST FIXE SUR LE CARTER DE LA POMPE.

Injection pump for combustion engines

ANGULAR DEVICE OF POSITIONING Of a DRIVING SHAFT IN a FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES

Device for locating the position of the control rack of a pump and for locking the latter in disassembling position

INTERNAL COMBUSTION ENGINE PROVIDED With a PUMP AND PROCESS WITH REPLACEMENT OF THE AFORESAID the PUMP

L'invention concerne un moteur à combustion interne (1) comprenant au moins un pignon (22) comprenant un trou central de fixation (220) et une pluralité de branches (221) reliant le trou à la ligne de denture périphérique (L) autour de laquelle est montée une courroie de distribution (21), et une pompe (3) comprenant un axe de sortie dont l'extrémité (31) est filetée, ladite pompe étant fixée à une face (4a) d'un carter de fixation (4) comprenant deux trous taraudés (41) par au moins deux vis (5) et l'extrémité filetée de l'axe de sortie étant fixée dans le trou central du pignon (220) par un écrou (42) sur l'autre face (4b) du carter de fixation. Selon l'invention, au moins deux branches (221) du pignon sont percées chacune d'un trou (222) et la face du carter de fixation (4b) en regard du pignon comprend deux trous taraudés (41) adaptés pour fixer le pignon au carter de fixation avant le démontage de la pompe.

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 ).

High pressure pump

A plunger stopper is installed to a cylinder hole forming portion of a cylinder forming member. The plunger stopper cooperates with a step portion of a plunger to limit movement of the plunger in a state where a slide surface of the plunger contacts an inner peripheral wall surface of the cylinder hole.

METHOD FOR TESTING AND REPAIRING A FUEL INJECTOR

In a method for testing and repairing an injector for injecting fuel into the combustion chamber of an internal combustion engine, wherein the injector includes a nozzle, a restrictor plate, and a control valve, and a nozzle clamping nut which holds together said parts and by way of which said parts are fastened to an injector body of the injector. The functional components—nozzle, restrictor plate and control valve—are separated from the injector body. A connection piece serves to connect the functional components to a test bench is screwed to the functional components with the aid of the nozzle clamping nut to form an injector module. The injector module is connected to a test bench and subjected to testing, and afterwards optionally repairing. 134578345345622. A method for testing and repairing an injector for injecting fuel into the combustion chamber of an internal combustion engine , wherein the injector includes a nozzle , a restrictor plate , and a control valve , and a nozzle clamping nut which holds together said parts and by way of which said parts are fastened to an injector body of the injector , characterized in that the functional components—nozzle () , restrictor plate () and control valve ()—are separated from the injector body () , a connection piece () that serves to connect the functional components ( , ,) to a test bench is screwed to the functional components ( , ,) with the aid of the nozzle clamping nut () to form an injector module () , and the injector module () is connected to a test bench and subjected to testing , and afterwards optionally repairing ,{'b': 8', '3', '4', '5', '2', '2', '3', '4', '5', '3', '4', '5', '7, 'wherein the screwing of the connection piece () to the functional components (,,) to form said injector module () is performed on the location of the internal combustion engine, the injector module () is subsequently transported to a test bench remote from the location of the internal combustion engine and the functional ...

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 AND PRODUCTION METHOD THEREOF

A pump body of a high-pressure pump includes a pressure chamber formed in a deep portion of a cylinder. A plunger reciprocates within the cylinder to vary a volume of the pressure chamber. A discharge path and a supply path are formed in the pump body and extend in a radial direction of the cylinder from the pressure chamber. A pin provided at an end of the plunger in the pressure chamber protrudes in one radial direction of the plunger to the outside of an inner circumference of the cylinder. In this case, the pin 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 provided in a deep portion of the cylinder;a plunger that reciprocates within the cylinder to vary a volume of the pressure chamber;a fuel path formed in the pump body so as to extend in a radial direction of the cylinder from the pressure chamber; anda protrusion portion protruding in one radial direction from an end of the plunger in the pressure chamber to the outside of an inner circumference of the cylinder.2. The high-pressure pump according to claim 1 , wherein:the cylinder and the pump body are formed integrally; andthe pump body closes the pressure chamber on a side opposite to the plunger.3. The high-pressure pump according to claim 1 , wherein:the protrusion portion is a column-shaped member fixed to a hole or a screw hole formed at the end of the plunger on a side protruding to the pressure chamber.4. The high-pressure pump according to claim 3 , wherein:the column-shaped member is a pin press-fitted and fixed to the hole formed at the end of the plunger on the side protruding to the pressure chamber.5. The high-pressure pump ...

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 ...

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 ...

DECOUPLING ELEMENT FOR A FUEL INJECTION DEVICE

A decoupling element for a fuel injection device has a low-noise construction. The fuel injection device includes at least one fuel injector and one receiving bore in a cylinder head for the fuel injector and the decoupling element between a valve housing of the fuel injector and a wall of the receiving bore. The decoupling element has a nonlinear progressive spring characteristic as a solid-state joint, at least one bearing collar including a valve contact surface, which is designed to be spherical, i.e., convex, extending upward from a flat annular area, the flat annular area being supported on a supporting base, and the inside of the annular area has a smaller inside diameter D than the bearing collar and the supporting base, which is supported on the wall of the receiving bore. 111-. (canceled)12. A decoupling element for a fuel injection device for a fuel injection system of an internal combustion engine , the fuel injection device including at least one fuel injector and one receiving bore for the fuel injector , and the decoupling element being situated between a valve housing of the fuel injector and a wall of the receiving bore , wherein the decoupling element is a solid-state joint which has a nonlinear progressive spring characteristic line , at least one bearing collar including a valve contact surface designed to be convex , extending upward out of a flat annular area , the flat annular area being supported on a supporting base , and an inside of the annular area having a smaller inside diameter than the bearing collar and the supporting base supported on the wall of the receiving bore.13. The decoupling element as recited in claim 12 , wherein the decoupling element has a one-piece or a multi-piece design.14. The decoupling element as recited in claim 16 , wherein the bearing collar is designed to be peripheral.15. The decoupling element as recited in claim 12 , wherein the bearing collar is formed with the aid of at least three bearing collar sections ...

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.

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, 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.

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 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 ...

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.

Camshaft for HP Common Rail Oil Pump, Manufacturing Method Thereof and Interference Assembly Device Thereof

An exemplary camshaft for a high pressure common rail oil pump and a manufacturing method thereof is provided. The method achieves interference assembly between the mandrel and cam piece, and satisfies anti-rotating torque of the cam piece relative to the mandrel while ensuring the surface hardness of the cam piece. The camshaft includes a mandrel and a cam piece arranged on the mandrel. The anti-rotating torque of the cam piece relative to the mandrel is at least 500 NM after the cam piece and the mandrel are connected by interference fit by hot charge practice. Surface hardness of the cam piece 1 is at least HRC58. The method includes performing interference assembly of the cam piece and the mandrel while performing quenching heat treatment on the cam piece, then quickly cooling the cam piece equipped with the mandrel at the cooling stage during the quenching heat treatment. 113-. (canceled)14. A camshaft for an HP common rail oil pump , comprising a mandrel and a cam piece on the mandrel , with anti-rotating torque of the cam piece relative to the mandrel being at least 500 NM after the cam piece and the mandrel are connected by interference fit , and surface hardness of the cam piece being at least HRC58.15. The camshaft for an HP common rail oil pump according to claim 14 , further comprising a pin inserted between the mandrel and a hub of the cam piece.16. The camshaft for an HP common rail oil pump according to claim 15 , further comprising the mandrel being provided with at least two cam pieces claim 15 , and the pin being located between two adjacent cam pieces.17. The camshaft for an HP common rail oil pump according to claim 14 , wherein the anti-rotating torque of the cam piece relative to the mandrel is at least 3000 NM after the cam piece and the mandrel are connected by interference fit by hot charge practice.18. A manufacturing method of a camshaft for an HP common rail oil pump claim 14 , comprising:performing interference assembly of a cam piece ...

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 ...

High-Pressure Fuel Pump And Fuel Injection System

Various embodiments may include a fuel pump for applying pressure to a fuel in a fuel injection system comprising: a housing with a pressure chamber; a fluid port for conducting fuel to and/or from the pressure chamber; a port receiving bore in the housing for receiving the fluid port; and a screw drive arranged in the internal bore of the fluid port, via which the fluid port can be acted on in order to be screwed into the port receiving bore. The fluid port has an internal bore fluidically connected to the pressure chamber. The fluid port is fastened in the port receiving bore with a screw connection. 2. The fuel pump as claimed in claim 1 , wherein the fluid port comprises a high-pressure port for guiding fuel from the pressure chamber to elements of the fuel injection system located downstream of the fuel pump.3. The fuel pump as claimed in claim 1 , wherein the fluid port includes:a contact region in contact with a wall of the port receiving bore; anda line region forming a line for guiding the fuel;wherein the internal bore forms a collection volume for collecting fuel in the contact region;the internal bore forms a line bore in the line region; andthe screw drive is integrated into the line bore.4. The fuel pump as claimed in claim 3 , wherein:in the contact region, the fluid port includes, on its outer side, an external thread for mating with an internal thread in the port receiving bore; andthe fluid port comprises a smooth outer wall without an engagement surface in the line region.5. The fuel pump as claimed in claim 4 , wherein the outer wall includes a coating accommodating torsional forces.6. The fuel pump as claimed in claim 1 , wherein the screw drive comprises a polygonal socket.7. The fuel pump as claimed in claim 6 , further comprising an insert in the screw drive claim 6 , the insert having a smooth inner surface.8. The fuel pump as claimed in claim 1 , wherein:the housing and the fluid port are fastened together by a crimped portion applying a ...

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.

Damper Capsule, Pressure Variation Damper, and High-Pressure Fuel Pump

Various embodiments may include a damper capsule comprising: a damping volume including a diaphragm having a deformation region deformable along a deformation axis by pressure pulsations and a connecting region; and a closure element for closing off the damping volume and connected to the diaphragm by a closure element. The diaphragm includes a profile region forming a spacer for separating the deformation region, in the direction of the deformation axis, from holding elements which hold the damper capsule when the damper capsule has been installed. The deformation region, the connecting region, and the profile region comprise a unipartite diaphragm component. 1. A damper capsule for a pressure pulsation damper of a high-pressure fuel pump in a fuel injection system , the damper capsule comprising:a damping volume including a diaphragm having a deformation region deformable along a deformation axis by pressure pulsations and a connecting region; anda closure element for closing off the damping volume and connected to the diaphragm by a closure element;wherein the diaphragm includes a profile region forming a spacer for separating the deformation region, in the direction of the deformation axis, from holding elements which hold the damper capsule when the damper capsule has been installed;wherein the deformation region, the connecting region, and the profile region comprise a unipartite diaphragm component.2. The damper capsule as claimed in claim 1 , wherein the profile region comprises a spring element resilient in a direction parallel to the deformation axis.3. The damper capsule as claimed in claim 1 , wherein the profile region includes passage openings through which fuel can flow during operation.4. The damper capsule as claimed in claim 1 , wherein the deformation region claim 1 , the connecting region claim 1 , and the profile region are rotationally symmetric about a central axis running parallel to the deformation axis of the damper capsule.5. The damper ...

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 ...

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 ...

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 ...

COMMON RAIL SYSTEM

A common rail system for a fuel injection system of an internal combustion engine, the common rail system comprising: a high pressure pump for receiving fuel from a fuel tank; at least one fuel injector for delivering fuel to the internal combustion engine; a common rail for receiving fuel from the high pressure pump through a flow path of the common rail system that connects the high pressure pump to the common rail, the common rail comprising a fuel reservoir in fluid communication with a common rail inlet and in fluid communication with the one or more fuel injectors; and a filter provided in the flow path. The filter is configured to filter fuel so as to prevent particulate matter from entering the common rail. The common rail system comprises only one filter. 1. A common rail system for an internal combustion engine , the common rail system comprising:a high pressure pump for receiving fuel from a fuel tank;at least one fuel injector for delivering fuel to the internal combustion engine;a common rail for receiving fuel from the high pressure pump through a flow path of the common rail system that connects the high pressure pump to the common rail, the common rail comprising a fuel reservoir in fluid communication with a common rail inlet and in fluid communication with the one or more fuel injectors; anda filter provided in the flow path and configured to filter fuel so as to prevent particulate matter from entering the common rail, wherein the common rail system comprises only one filter.2. A common rail system as claimed in claim 1 , wherein the flow path comprises the common rail inlet and an outlet of the high pressure pump claim 1 , and wherein the filter is provided at the common rail inlet.3. A common rail system as claimed in claim 1 , wherein the flow path comprises the common rail inlet and an outlet of the high pressure pump claim 1 , and wherein the filter is provided at the outlet of the high pressure pump.4. A common rail system as claimed in ...

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 pump adapter

In at least some implementations, an adapter, for a fuel pump having a casing, has a base having an axis and an opening through which fluid may flow, and multiple tabs connected to the base. The tabs are circumferentially spaced apart with a void between at least part of the tabs, and at least two tabs have a contact portion that extends radially inwardly to define a minimum diameter opening between the tabs. Each contact portion extends along a portion less than all of the surface areas of the radially inner surface of the tabs.

High-Pressure Fuel Pump

Provided is a high-pressure fuel pump that ensures oil tightness even at high fuel pressure and has a small and lightweight inexpensive discharge valve structure. Therefore, a high-pressure fuel pump according to the present invention includes: a discharge valve arranged on a discharge side of a pressurizing chamber; a discharge valve seat on which the discharge valve is seated; and a facing member configured independently as a separate member from the discharge valve seat and located on an opposite side of the discharge valve seat with the discharge valve interposed therebetween, in which a stroke direction regulating portion that regulates displacement of the discharge valve in a stroke direction is formed on a tapered surface of the facing member. 1. A high-pressure fuel pump comprising:a discharge valve arranged on a discharge side of a pressurizing chamber;a discharge valve seat on which the discharge valve is seated; anda facing member configured independently as a separate member from the discharge valve seat and located on an opposite side of the discharge valve seat with the discharge valve interposed therebetween,wherein a stroke direction regulating portion that regulates displacement of the discharge valve in a stroke direction is formed on a tapered surface of the facing member.2. The high-pressure fuel pump according to claim 1 , wherein the discharge valve is configured by a ball valve.3. The high-pressure fuel pump according to claim 2 , further comprising a discharge valve chamber in which a discharge valve mechanism including the discharge valve and the discharge valve seat is arranged claim 2 ,wherein the facing member is configured by a plug member (plug) that shields the discharge valve chamber from outside.4. The high-pressure fuel pump according to claim 1 , further comprising a discharge valve chamber in which a discharge valve mechanism including the discharge valve and the discharge valve seat is arranged claim 1 ,wherein the facing member ...

Pump Housing

Various embodiments include an assembly comprising: a housing; a flange having a first and second flange side; a collar extending into a connector opening of the flange; and a depression running around the assembly opening on the first flange side. The flange has a first assembly opening spaced from the connector opening. The depression includes an inner periphery running laterally along an entire circumference of the first flange side spaced from the assembly opening. 1. An assembly comprising:a housing;a flange having a first flange side and opposite thereto a second flange side;a collar which either is part of the housing or is fastened to the housing;wherein the collar extends into a connector opening of the flange;the flange has a first assembly opening spaced from the connector opening; anda depression running around the assembly opening on the first flange side;wherein the depression includes an inner periphery running laterally along an entire circumference of the first flange side spaced from the assembly opening.2. The assembly as claimed in claim 1 , wherein:the flange includes a second assembly opening spaced apart from the connector opening;the connector opening is disposed between the first assembly opening and the second assembly opening; andthe first flange side includes a second depression running about the second assembly opening;the second depression includes an inner periphery along the entire circumference of the second assembly opening spaced from the second assembly opening.3. The assembly as claimed in claim 1 , wherein the depression comprises an annular groove.4. The assembly as claimed in claim 1 , wherein a depth of the depression is uniform along the entire depression claim 1 , and the depth is in the range from 0.1 mm to 0.5 mm.5. The assembly as claimed in claim 1 , wherein a width of the depression is uniform along the entire depression.6. The assembly as claimed in claim 1 , wherein:the assembly opening has a first peripheral portion ...

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 ...

Arrangement of Housing and a Flange

Some embodiments include an assembly comprising: a housing; a flange having a first and second flange side; and a collar extending into a connector opening of the flange. The flange includes a first assembly opening remote from the connector opening. The first assembly opening has a first peripheral portion contiguous with a first flange surface region and a second peripheral portion contiguous to a second flange surface region and closer to the connector opening than the first peripheral portion. A periphery of the connector opening on the second flange side and/or a surface region of the flange adjacent to the connector opening defines a geometric reference plane. The first flange surface region is more remote in comparison to the second flange surface region in a direction perpendicular to the reference plane. 1. An assembly comprising:a housing;a flange having a first flange side and opposite thereto a second flange side;a collar either part of the housing or fastened to the housing, the collar extending into a connector opening of the flange;wherein the flange includes a first assembly opening remote from the connector opening;the first assembly opening having a first peripheral portion contiguous with a first flange surface region on the first flange side and a second peripheral portion contiguous to a second flange surface region and closer to the connector opening than the first peripheral portion;wherein a periphery of the connector opening on the second flange side and/or a surface region of the flange adjacent to the connector opening defines a geometric reference plane; andthe first flange surface region is more remote in comparison to the second flange surface region in a direction perpendicular to the reference plane.2. The assembly as claimed in claim 1 , wherein:the flange includes a second assembly opening remote from the connector opening;the connector opening is disposed between the first assembly opening and the second assembly opening;the second ...

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 ...

BOLT STYLE SUSPENDED FUEL INJECTOR

A fuel injector assembly includes a fuel cup, a fuel injector, and a bolt. The fuel cup defines a cavity and a cup inlet. The fuel injector includes an injection tip and an upper housing. The injection tip defines a fuel outlet opposite the upper housing. The upper housing defines a fuel inlet and a threaded bore. The fuel inlet is disposed within the cavity and in fluid communication with the cup inlet. The threaded bore is disposed within the fuel cup. The bolt is threadably engaged with the threaded bore. The bolt couples the upper housing to the fuel cup. 1. A fuel injector assembly comprising:a fuel cup defining a cavity and a cup inlet;a fuel injector including an injection tip and an upper housing, the injection tip defining a fuel outlet opposite the upper housing, the upper housing defining a fuel inlet and a threaded bore, wherein the fuel inlet is disposed within the cavity and in fluid communication with the cup inlet, wherein the threaded bore is disposed within the fuel cup; anda bolt threadably engaged with the threaded bore, the bolt coupling the upper housing to the fuel cup.2. The fuel injector assembly according to claim 1 , wherein the fuel cup defines a bolt bore aligned with the threaded bore claim 1 , the bolt extending through the bolt bore to engage the threaded bore.3. The fuel injector assembly according to claim 2 , wherein a surface of the upper housing contacts a surface of the fuel cup to define an upper seal that isolates the bolt bore from fluid communication with the fuel inlet.4. The fuel injector assembly according to further comprising an upper seal between the upper housing and the fuel cup claim 1 , the upper seal isolating the threaded bore from fluid communication with the fuel inlet.5. The fuel injector assembly according to claim 4 , wherein the upper housing defines a seal surface disposed about the threaded bore that contacts a mating seal surface of the fuel cup to form the upper seal.6. The fuel injector assembly ...

ARRANGEMENT OF A VALVE CLIPPED TO A PUMP

A snap-fitted arrangement of a valve on a pump includes means of which at least one is elastic such that one of the means is integrated with the valve and the other means is integrated with the pump. The means are arranged in a complementary manner in a linear engagement of the male-female type such that the elastic means elastically deforms during engagement. One of the means includes a channel and the other means includes a protuberance which engages the channel. 1. (canceled)2. The arrangement as claimed in claim 9 , in which the casing and the body are provided with radial faces arranged pressing against one another when the protuberance engages in the channel such that the casing is snap-fitted onto the body and is axially positioned relative to the body.3. The arrangement as claimed in claim 2 , in which claim 2 , when the protuberance engages in the channel claim 2 , the elastic means returns to its rest shape claim 2 , retaining a residual elastic deformation such that the casing is snap-fitted claim 2 , positioned axially and held radially relative to the body.4. The arrangement as claimed in claim 3 , in which the channel and the protuberance are provided with complementary faces held against one another by the residual elastic deformation and producing an axial force pressing the casing against the body such that the valve is snap-fitted claim 3 , axially and held radially relative to the device.5. The arrangement as claimed in claim 4 , in which the complementary faces of the channel and of the protuberance are conical faces whose vertices are on the main axis and are oriented towards the interior of the body.6. The arrangement as claimed in claim 9 , in which the elastic means deforms claim 9 , thereby allowing the valve and the device to be separated in a non-destructive manner.7. The arrangement as claimed in claim 9 , in which the body is that of a high-pressure fuel pump and in which the valve controls the ingress of fuel into the pump.8. (canceled) ...

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 ...

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 ...

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 ...

Method For Producing A Pressure Limiting Valve, Pressure Limiting Valve, And Component For A Fuel Injection System

A pressure limiting valve for a fuel injection system may include a sleeve, a fixing pin, a spring, a sealing element, and a seat. The sleeve may have a longitudinal axis. The fixing pin protruding through a cavity enclosed by the sleeve. The spring may have a first end supported on the sleeve and a second end supported by the sealing element. The seat may provide a sealing surface for the sealing element to block a fluid flow through the valve when closed position, and allow this flow to pass in other positions. The outer circumference of the sleeve may vary within predefined tolerances along the longitudinal axis. The fixing pin may be shaped to plastically deform by a movement of the fixing pin along the longitudinal axis, in order to press the sleeve into the housing. 1. A method for producing a pressure limiting valve for a fuel injection system , the method comprising:providing a housing having a locating bore, which has a diameter that remains constant within predefined tolerances along a longitudinal axis,providing a sealing element, a spring and a sleeve with a fixing pin, which protrudes through a cavity, which is enclosed by the sleeve,arranging the sealing element, the spring and the sleeve with the fixing pin in the locating bore, so that the spring is supported by a first end on the sleeve and by a second end on the sealing element,moving the sleeve relative to the housing along the longitudinal axis and thereby adjusting the preload of the spring,moving the fixing pin along the longitudinal axis relative to the sleeve and thereby plastically deforming the sleeve, in order to press the sleeve into the housing, when a value of the preload of the spring corresponds to a predefined value of the opening pressure for the pressure limiting valve.2. The method according to claim 1 , in which the sleeve is displaceable by more than one millimeter along the longitudinal axis claim 1 , in order to adjust the preload.3. A pressure limiting valve for a fuel ...

HIGH-PRESSURE FUEL PUMP

The invention relates to a high pressure fuel pump () comprising a housing () and a flange () by means of which the housing () can be fastened to an engine block or cylinder head, the flange () being formed of at least two flange parts () that are separate from the housing () and are separated from each other, and that overlap mutually in the fastened state of the housing (). 1. A high pressure fuel pump comprising:a housing configured to receive at least one high pressure generating element for generating a high pressure in the fuel;a flange configured to fasten the housing to at least one of a cylinder head and an engine block of an internal combustion engine, the flange being separate from the housing and comprising at least two flange parts, the flange parts separated from one another and each configured to engage around a respective part-circumferential region of the housing, the flange parts configured to overlap mutually in the fastened state of the housing.2. The high pressure fuel pump as claimed in wherein each flange part comprises a first flange part end region and a second flange part end region claim 1 , the flange parts configured to overlap both in the first flange part end region and in the second flange part end region in the fastened state of the housing.3. The high pressure fuel pump as claimed in wherein each flange part defines a first flange plane and a second flange plane claim 2 , flange planes offset in parallel with respect to one another claim 2 , the first flange part end region arranged in the first flange plane claim 2 , and the second flange part end region arranged in the second flange plane.4. The high pressure fuel pump as claimed in claim 2 , wherein each flange part defines at least one screw hole for guiding through a fastening bolt in the first and in the second flange part end region claim 2 , the flange parts configured to facilitate the screw holes of the first flange part and the second flange part to overlap in the ...

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.

METHOD FOR MANUFACTURING ASSEMBLY, PARTS SET, METHOD FOR MANUFACTURING FUEL INJECTION PUMP, AND FUEL INJECTION PUMP

An assembly includes a housing including a first assembly portion and a cover including a second assembly portion. One of the first assembly portion and the second assembly portion includes: (i) a small diameter inner circumferential wall, a large diameter inner circumferential wall, and an inner stepped portion; or (ii) a large diameter outer circumferential wall, a small diameter outer circumferential wall, and an outer stepped portion. A method for manufacturing the assembly includes a press-fitting step of fitting the housing and the cover by press-fitting to form a circumferential gap that is open in an axial direction and a welding step of welding the housing and the cover at the circumferential gap. 1. A method for manufacturing an assembly , the assembly including:a housing including a first assembly portion that is formed into a cylindrical shape and has an opening end; anda cover including a second assembly portion that is formed into a cylindrical shape and has an opening end, whereinone of the first assembly portion and the second assembly portion includes:(i) a small diameter inner circumferential wall, a large diameter inner circumferential wall, and an inner stepped portion that connects between the small diameter inner circumferential wall and the large diameter inner circumferential wall; or(ii) a large diameter outer circumferential wall, a small diameter outer circumferential wall, and an outer stepped portion that connects between the large diameter outer circumferential wall and the small diameter outer circumferential wall,the method comprising: (i) between the large diameter inner circumferential wall of the one of the first assembly portion and the second assembly portion and an outer circumferential wall of the other of the first assembly portion and the second assembly portion; or', '(ii) between the small diameter outer circumferential wall of the one of the first assembly portion and the second assembly portion and an inner ...

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 ...

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 ...

UNIT PUMP FOR USE IN A COMBUSTION ENGINE

A unit pump for use in a combustion engine is disclosed, as well as a method for assembling said combustion engine. The unit pump includes a tappet interacting with a crankshaft or camshaft for providing the fuel injection. The tappet includes first fixing sections interacting with a fastener to position the tappet relative to the cylinder or engine housing of the combustion engine when assembled. 112-. (canceled)13. A unit pump fixable to in a cylinder formed in a cylinder housing of combustion engine for compressing the fuel delivered by a fuel pump , the unit pump comprising a tappet interacting with one of the crankshaft or the camshaft for actuating the unit pump , wherein the tappet includes a first fixing section interacting with a fastener to position the tappet relative to the cylinder housing upon mounting of the unit pump on the combustion engine.14. The unit pump according to claim 13 , wherein the first fixing sections comprise recesses for providing a form closure with the fastener.15. The unit pump according to claim 13 , wherein the first fixing sections comprise protrusions for providing a form closure with the fastener.16. The unit pump according to claim 13 , wherein the fastener is releasably engagable with the first fixing sections.17. A combustion engine configured to power a vehicle claim 13 , the combustion engine comprising a cylinder formed by a cylinder housing having second fixing sections interacting with the fastener to position the tappet of a unit pump according to relative to the cylinder housing upon mounting of the unit pump on the combustion engine.18. The combustion engine according to claim 17 , wherein the second fixing sections comprise recesses for providing a form closure with the fastener.19. The combustion engine according to claim 17 , wherein the second fixing sections comprise protrusions for providing a form closure with the fastener.20. The combustion engine according to claim 17 , wherein the fastener is releasably ...

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.

Nut and Line Connection

A nut, in particular a union nut for a line connection, extends along a longitudinal direction, wherein the nut has at least one expansion region. The expansion region has circumferentially one or more recesses which extend transversely and/or obliquely to the longitudinal direction. 1. A nut , comprising:at least one expansion region of the nut, which nut extends along a longitudinal direction, whereinthe expansion region circumferentially has one or more cutouts which extend transversely and/or obliquely with respect to the longitudinal direction.2. The nut according to claim 1 , whereina plurality of cutouts circumferentially forms a closed ring.3. The nut according to claim 1 , whereinthe expansion region has a plurality of cutouts arranged in rows.4. The nut according to claim 1 , whereina plurality of cutouts is provided, wherein the cutouts are formed in a bone-shaped manner.5. The nut according to claim 1 , whereinthe nut has a shoulder region, a threaded region and an intermediate middle region, andwherein the expansion region is arranged in the middle region and/or in the threaded region.6. The nut according to claim 1 , wherein the nut is a union nut for a line connection.7. A line connection claim 1 , comprising:first and second line ends;a nut comprising at least one expansion region, which nut extends along a longitudinal direction, and wherein the expansion region circumferentially has one or more cutouts extending transversely and/or obliquely with respect to the longitudinal directions, whereinthe first and second line ends are connected via the nut.8. The line connection according to claim 7 , whereinthe first line end has a first sealing surface, andthe second line end has a second sealing surface, whereinthe expansion region of the nut, in a screwed-together state, is positioned at least between the first sealing surface and the second sealing surface.9. The line connection according to claim 8 , whereinthe expansion region is arranged and formed ...

DAMPER DEVICE

A damper device includes at least a diaphragm, an opposite member that faces the diaphragm and is connected to the diaphragm in a hermetically sealed state over a circumferential direction, and a deformation-suppressing member that is disposed in a hermetically sealed space defined by the diaphragm and the opposite member. The deformation-suppressing member includes a central portion that includes a concave surface of which a depth is increased toward a center in a radial direction thereof, and protruding portions that are provided closer to an outer peripheral side than the central portion. 1. A damper device provided in a flow channel of fluid for reducing pulsation of the fluid , comprising:a diaphragm;an opposite member that faces the diaphragm and is connected to the diaphragm in a hermetically sealed state over a circumferential direction; anda deformation-suppressing member that is disposed in a hermetically sealed space defined by the diaphragm and the opposite member, whereinthe deformation-suppressing member includes a central portion that includes a concave surface of which a depth is increased toward a center in a radial direction thereof, and protruding portions that are provided closer to an outer peripheral side than the central portion.2. The damper device according to claim 1 , whereinthe protruding portions of the deformation-suppressing member are made of elastic material.3. The damper device according to claim 2 , whereinthe central portion and the protruding portions of the deformation-suppressing member are formed of an integrated elastic member.4. The damper device according to claim 1 , whereinthe central portion and the protruding portions of the deformation-suppressing member are spaced apart from each other in the radial direction.5. The damper device according to claim 1 , whereinthe protruding portions of the deformation-suppressing member are arranged so as to be spaced apart from each other in the circumferential direction.6. The ...

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 ...

Cam follower and method for manufacturing such a cam follower

A cam follower, comprising: a tappet which includes two flanges provided with opposite holes centered on a transverse axis; a pin extending along the transverse axis between two opposite ends received in the opposite holes; and a roller movable in rotation relative to the pin around the transverse axis and adapted to roll on a cam. Each of the opposite holes is provided with: an open portion for mounting the pin by translation in a first direction perpendicular to the transverse axis, a cylindrical portion for supporting the pin along the first direction and a plane portion for retaining the pin along the transverse axis during transport and mounting of the cam follower. A method includes steps for manufacturing such a cam follower.

Adjustable fuel plate for diesel engine fuel pump

An adjustable fuel plate device for a diesel fuel pump is disclosed. The adjustable fuel plate device can include a fuel plate to limit travel of a governor arm of a diesel fuel pump for a diesel engine. The adjustable fuel plate device can also include a translation mechanism to move the fuel plate relative to the governor arm. Additionally, the adjustable fuel plate device can include a control system coupleable to the translation mechanism to control movement of the fuel plate during operation of the engine.

PULSATION DAMPER

A pulsation damper is small in size and can achieve an appropriate supporting force for a diaphragm damper. A pulsation damper accommodated in a case includes a diaphragm damper having a gas sealed therein, and a first support member and a second support member that are disposed between the case and the diaphragm damper and that hold the diaphragm damper. 1. A pulsation damper accommodated in a case , the pulsation damper comprising:a diaphragm damper having a gas sealed therein; anda support member that is disposed between the case and the diaphragm damper and that holds the diaphragm damper,wherein the support member comprises an annular holding part that is provided on a peripheral edge portion thereof and that holds a peripheral edge of the diaphragm damper, a base part provided on a center part thereof, a plurality of elastically deformable beam parts that are defined by a plurality of opening portions formed in an annularly aligned manner around the base part between the holding part and the base part, each of the plurality of beam parts held by the holding part at one end and held by the base part at the other end, and a plurality of claw parts that abut on the case in an elastically deformable manner, each of the plurality of claw parts provided to extend outward from the base part between two adjacent beam parts.2. The pulsation damper according to claim 1 ,wherein a width of the plurality of beam parts and a width of the plurality of claw parts are respectively approximately the same.3. The pulsation damper according to claim 1 ,wherein the plurality of beam parts comprises a neck provided at least at a portion thereof.4. The pulsation damper according to claim 1 ,wherein the plurality of beam parts comprises a ridge-trough shape at least at a portion thereof.5. The pulsation damper according to claim 4 ,wherein the plurality of beam parts comprises a bellows shape.6. The pulsation damper according to claim 1 ,wherein the holding part is composed of an ...

System and Method for Health Determination of a Machine Component

A system for determining health of a component is provided. The system includes an operational parameter module associated with the component and in communication with a controller. The controller is configured to receive an operating parameter signal from the operational parameter module. The controller is configured to monitor a change of the operating parameter over a predetermined time period. The controller is configured to compare the monitored operating parameter with a first predetermined threshold. The controller is configured to determine a rate of change of the monitored operating parameter over the predetermined time period. The controller is also configured to compare the determined rate of change with a second predetermined threshold. The controller is further configured to determine the health of the component based, at least in part, on the comparisons with the first and second predetermined thresholds respectively and one or more additional parameters associated with the component. 1. A system for determining health of a component , the system comprising:an operational parameter module associated with the component, the operational parameter module configured to generate an operating parameter signal indicative of an operating parameter of the component; and receive the operating parameter signal from the operational parameter module;', 'monitor a change of the operating parameter over a predetermined time period;', 'compare the monitored operating parameter with a first predetermined threshold;', 'determine a rate of change of the monitored operating parameter over the predetermined time period;', 'compare the determined rate of change with a second predetermined threshold; and', 'determine the health of the component based, at least in part, on the comparisons with the first and second predetermined thresholds respectively and one or more additional parameters associated with the component., 'a controller in communication with the operational ...

INJECTION NOZZLE FOR INJECTING LUBRICATING OIL IN ENGINE CYLINDERS AND USE THEREOF

An injection nozzle for use in injecting lubricating oil into cylinders in large engines is provided. The nozzle is adapted for fastening in a cylinder wall with a nozzle rod extending through the cylinder wall and with a nozzle outlet at the inner end of the nozzle rod. The nozzle rod includes a cylindrical valve seat boring with a displaceable valve body having a cylindrical sealing face which interacts with the cylindrical valve seat boring of the nozzle rod, the valve body biased by a spring for effective closing of the valve. The valve body is formed by a cylindrical rod having a turned recess in the cylindrical sealing face of the valve body. The turned recess is arranged at the inner end of the valve body with parts of the cylindrical sealing face of the valve body at each side of the turned recess. 1. An injection nozzle for use in injecting lubricating oil into cylinders in large engines and adapted with mounting means for fastening in a cylinder wall with a nozzle rod extending through the cylinder wall and with at least one nozzle outlet at the inner end of the nozzle rod , the nozzle rod including a valve with a cylindrical valve seat boring in which is provided a displaceable valve body having a cylindrical sealing surface which interacts with the cylindrical valve seat boring of the nozzle rod , the valve body having an enlarged head at its outer end with a contact face for a spring disposed around the valve body for establishing a spring-loaded closing of the valve , the nozzle rod including a passage for pressurised oil for supplying pressurised oil to a pressure chamber in which the pressurised oil can exert a force on the valve body so that it is displaced against the action of the spring for opening the valve and establishing an overpressure injection of oil through the nozzle outlet until the oil pressure drops such that the spring establishes an efficient closing of the valve , wherein the valve body is formed by a cylindrical rod which has a ...

Fuel Pump

A fuel pump for a fuel injection system of an internal combustion engine includes a pump housing and a fastening section which is present on the pump housing for fastening the fuel pump to a base, in particular an engine block. The fastening section has a through opening for receiving a holding element for a fastening means, in particular a screw. At least one radially inwardly directed projection is present at least in an end region of the through opening, the end region facing the base in the installed position. 1. A fuel pump for a fuel injection system of an internal combustion engine , the fuel pump comprising:a pump housing; anda fastening section arranged on the pump housing, the fastening section configured to fasten the fuel pump to a base,wherein the fastening section defines a through opening configured to receive a holding element for a fastener, andwherein at least one radially inwardly directed first projection is arranged at least in a first end region of the through opening, the first end region facing toward the base in an installed position.2. The fuel pump as claimed in claim 1 , wherein at least one radially inwardly directed second projection is arranged in a second end region of the through opening claim 1 , the second end region facing away from the base in the installed position.3. The fuel pump as claimed in claim 1 , wherein the at least one first projection only extends over a part of an inner circumference of the through opening.4. The fuel pump as claimed in claim 3 , wherein the at least one first projection includes multiple projections arranged evenly distributed over the inner circumference.5. The fuel pump as claimed in claim 3 , wherein the at least one first projection includes multiple projections arranged unevenly distributed over the inner circumference.6. The fuel pump as claimed in claim 1 , wherein the at least one first projection includes a single projection.7. The fuel pump as claimed in claim 1 , wherein the through ...

COMMON RAIL SYSTEM HAVING MECHANICAL UNIT PUMPS

A fuel system for an engine is disclosed. The engine may have a crankshaft and a plurality of cylinders. The fuel system may have a plurality of plungers separately connectable to the crankshaft and a plurality of fuel injectors associated with the plurality of cylinders. The fuel system may also have a common rail configured to store pressurized fuel. The fuel system may additionally have a plurality of first conduits, each first conduit fluidly connecting a barrel associated with a respective one of the plurality of plungers to the common rail. The fuel system may also have a plurality of second conduits, each second conduit fluidly connecting the common rail to a respective one of the plurality of fuel injectors. 1. A fuel system for an engine having a crankshaft and a plurality of cylinders , the fuel system comprising:a plurality of plungers separately connectable to the crankshaft;a plurality of fuel injectors associated with the plurality of cylinders;a common rail configured to store pressurized fuel;a plurality of first conduits, each first conduit fluidly connecting a barrel associated with a respective one of the plurality of plungers to the common rail; anda plurality of second conduits, each second conduit fluidly connecting the common rail to a respective one of the plurality of fuel injectors.2. The fuel system of claim 1 , wherein a rotational position of each of the plurality of plungers determines an amount of fuel introduced into a respective one of the plurality of first conduits per stroke.3. The fuel system of claim 2 , further including a motor configured to adjust the rotational position of the plurality of plungers.4. The fuel system of claim 3 , further including a rack operably connecting the motor to the plurality of plungers.5. The fuel system of claim 3 , further including:a sensor configured to generate a signal indicative of a fuel pressure in the common rail; anda controller in communication with the motor and the sensor, the ...

Isolation valve for pressurized tank

An isolation mechanism for isolating a submerged pump in a storage vessel, where the isolation mechanism comprises a primary valve member and a secondary valve member, which are both biased in a fail-closed position. The isolation mechanism allows for redundancy for safety and reliability, and can be operated externally of the storage vessel. Furthermore, the isolation mechanism comprises venting and purging devices for safe operation of removal and installation of the pump in the storage vessel.

TEST PROCEDURE FOR HIGH-PRESSURE PUMPS

A method for testing a high-pressure pump, particularly a high-pressure pump which is provided to inject fuel into a combustion engine, the method including filling the high-pressure pump with a fluid prior to switching it on. 110-. (canceled)11. A method for testing a high-pressure pump , comprising:filling the high-pressure pump with a fluid prior to switching it on.12. The method as recited in claim 11 , wherein the high-pressure pump is designed to inject fuel into a combustion engine.13. The method as recited in claim 11 , further comprising:switching on the high-pressure pump only after at least one of a return-flow quantity and a delivery quantity has been measured at outputs of the high-pressure pump.14. The method as recited in claim 11 , further comprising:filling a high-pressure accumulator by way of the high-pressure pump; andrestricting an outlet of the high-pressure accumulator prior to switching on the high-pressure pump.15. The method as recited in claim 14 , further comprising:prior to switching on the high-pressure pump, energizing a pressure regulating valve which is provided at an outlet of the high-pressure accumulator to already restrict the outlet of the high-pressure accumulator before the high-pressure pump is switched on.16. The method as recited in claim 14 , further comprising:measuring the pressure in the high-pressure accumulator, and activating a pressure control if the pressure in the high-pressure accumulator exceeds a preset limiting value.17. The method as recited in claim 14 , wherein the method includes that even upon a change of the test step claim 14 , in case of a modification of the setpoint pressure claim 14 , not to reduce the pressure in the high-pressure accumulator to below a predetermined minimum pressure.18. The method as recited in claim 17 , wherein the predetermined minimum pressure is a pressure of 200 bar.19. The method as recited in claim 11 , further comprising:activating a metering unit of the high-pressure ...

FUEL PUMP HOUSING

A fuel pump housing includes a pumping chamber that is substantially spherical and a drilling intersecting the pumping chamber at an opening. The drilling transitions into the pumping chamber at a transition region of progressively increasing diameter. The transition region and the spherical pumping chamber are configured such that a peak stress in the fuel pump housing is at a location that is spaced away from the opening. 115-. (canceled)16. A fuel pump housing for use in a fuel pump of a common rail fuel injection system in a vehicle engine , the fuel pump housing comprising:a pumping chamber for receiving pressurised fuel, wherein the pumping chamber is substantially spherical; anda drilling intersecting the pumping chamber at an opening, wherein the drilling transitions into the pumping chamber at a transition region of progressively increasing diameter;wherein the transition region and the pumping chamber are configured such that, when the fuel pump housing is in use, a peak stress in the fuel pump housing is at a location that is spaced away from the opening.17. The fuel pump housing of claim 16 , wherein the transition region defines an inner surface that flares towards the pumping chamber to define a trumpet-shaped surface.18. The fuel pump housing of claim 17 , wherein the inner surface of the transition region and a spherically-curved inner surface of the pumping chamber together define a continuously curved surface.19. The fuel pump housing of claim 18 , wherein a boundary between the inner surface of the transition region and the spherically-curved inner surface of the pumping chamber is defined by at least a section of an annulus claim 18 , each point on the section of the annulus being a point of inflection of the continuously curved surface.20. The fuel pump housing of claim 16 , wherein the drilling comprises a main bore having a bore diameter and an intersection region between the main bore and the pumping chamber claim 16 , the intersection region ...

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

A mechanism for reducing pressure pulsation includes a pair of metal dampers formed by joining two disk-shaped metal diaphragms over an entire circumference and forming a hermetically sealed space inside a joined portion. Gas is sealed in the aforementioned hermetically sealed space of the damper, and a pair of pressing members give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion. The mechanism is unitized, with the pair of pressing members being connected in a state in which they sandwich the metal damper. 1. A fuel supply pump comprising:a pump housing that is provided with a concave portion formed so as to be recessed from an upper end face of the pump housing;a pressurizing chamber that is formed in the pump housing;a damper chamber that is formed on an intake side of the pressurizing chamber;a damper cover that covers the damper chamber;a metal diaphragm damper that is disposed in the damper chamber;a first holding member that is disposed on an upper side of the metal diaphragm damper;a second holding member that is disposed on a lower side of the metal diaphragm damper, whereina lower end portion of the second holding member is in contact to an inner surface of the concave portion, and an upper end portion of the second holding member is in contact to the metal diaphragm damper in a space above the upper end face of the pump housing.2. The fuel supply pump according to claim 1 , whereinthe metal diaphragm damper is configured to be arranged in an upper side than the upper end face of the pump housing.3. The fuel supply pump according to claim 1 , whereinthe second holding member is arranged via a gap with an inner peripheral surface of the concave portion of the pump housing, thereby being positioned in a radial direction.4. The fuel supply pump according to claim 1 , whereinthe second holding member is arranged on an inner peripheral side of an inner peripheral surface ...

HIGH-PRESSURE FUEL PUMP AND FUEL SUPPLY DEVICE FOR AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR OF A MOTOR VEHICLE

The invention relates to a high-pressure fuel pump for supplying fuel to a first injection device of an internal combustion engine, in particular of a motor vehicle, having at least one first low-pressure port, via which the fuel can be fed to the high-pressure fuel pump from a low-pressure fuel pump for conveying the fuel, having at least one low-pressure chamber, to which at least a part of the fuel fed to the high-pressure fuel pump via the first low-pressure port can be fed, having at least one second low-pressure port, for conducting the fuel conveyed by means of the low-pressure fuel pump and fed to the high-pressure fuel pump away from the high-pressure fuel pump to a second injection device provided in addition to the first injection device. 1. A high-pressure fuel pump for supplying fuel to a first injection device of an internal combustion engine , in particular of a motor vehicle , having at least one first low-pressure port , via which the fuel can be fed to the high-pressure fuel pump from a low-pressure fuel pump , having at least one low-pressure chamber , to which at least a part of the fuel fed to the high-pressure fuel pump via the first low-pressure port can be fed , having at least one second low-pressure port , for conducting the fuel conveyed by means of the low-pressure fuel pump and fed to the high-pressure fuel pump away from the high-pressure fuel pump to a second injection device provided in addition to the first injection device , having a pump housing , in which there is arranged at least one conveying element which is movable relative to the pump housing and which serves for conveying the fuel to the first injection device , having a compression chamber , the volume of which is variable by movement of the conveying element , and having a collecting chamber , which is arranged on a side of the conveying element averted from the compression chamber and which is variable in terms of its volume by movement of the conveying element and which ...

PUMP FOR INTERNAL COMBUSTION ENGINE AND METHOD OF FORMING THE SAME

A high pressure fuel pump used for an internal combustion engine and a related method are provided. The fuel pump has a body having a top surface and a side surface. A damper housing is provided on the top surface. A damper cover is provided on the damper housing. A top engaging structure of the damper housing and a bottom engaging structure of the damper cover operatively engage each other to connect the damper cover to the damper housing in a sealed manner. The damper cover and the damper housing collectively define a space for accommodating one or more fluid pressure dampers. A fuel is introduced into the fuel pump through a fuel inlet fitting and processed by the fluid pressure dampers to increase the pressure of the fuel. The fuel of increased pressure is released through a fuel outlet fitting of the fuel pump. 1. A fuel pump comprising:a body having a top surface and a side surface, wherein the top surface and the side surface are angular with respect to each other;a damper housing provided on the top surface, wherein the damper housing comprises a substantially cylindrical wall extending vertically from the top surface along a vertical axis of the substantially cylindrical wall;a damper cover provided on the damper housing, wherein the damper cover comprises a substantially cylindrical wall extending co-axially along the vertical axis, wherein the damper housing comprises a top engaging structure and the damper cover comprises a bottom engaging structure, wherein the top engaging structure and the bottom engaging structure operatively engage each other to connect the damper cover to the damper housing in a sealed manner, wherein the damper cover and the damper housing collectively define a space for accommodating at least one fluid pressure damper;a fuel inlet fitting through which a predetermined fuel enters the fuel pump, wherein the fuel inlet fitting is substantially cylindrical, wherein the fuel inlet fitting is insertable into an opening of the damper ...

High-pressure fuel supply pump

To provide a high-pressure fuel supply pump having a relief valve mechanism capable of suppressing deterioration of the seat property due to the influence of deformation caused by press-fitting while press-fitting and fixing a relief seat. To achieve this, a relief seat 201 of a relief valve mechanism 200 has, on its inner peripheral side, a seat portion 201a on which a valve 202 is seated, a small-diameter channel portion 201b formed with a smaller diameter than the valve 202 on an upstream side of the seat portion 201a, and a large-diameter channel portion 201c formed with a larger diameter than the small-diameter channel portion 201b on an upstream side of the small-diameter channel portion 201b, and, on its outer peripheral side, a fine gap portion 201d formed between the relief seat 201 and a member arranged on an outer peripheral side of the relief seat 201 at a position overlapping the small-diameter channel portion 201b in a flow direction of the fuel, and a press-fit portion 205a coming into contact with the member when the relief seat 201 is press-fitted into the member at a position overlapping the large-diameter channel portion 201c in the flow direction of the fuel.

High-Pressure Fuel Pump

A high-pressure fuel pump for a fuel injection system of an internal combustion engine includes a pump housing and at least one fastening flange that is fixed to the pump housing by a welding. The welding has one weld region and at least one weld bead arranged laterally from the weld region. The weld bead is arranged in a receiving space formed between the pump housing and the fastening flange. 1. A high-pressure fuel pump for a fuel injection system of an internal combustion engine , comprising:a pump housing; andat least one fixing flange that is fixed to the pump housing by a welded joint, the welded joint including a weld region and at least one weld bead arranged laterally with respect to the weld region,wherein the weld bead is arranged in a receiving space formed between the pump housing and the fixing flange.2. The high-pressure fuel pump as claimed in claim 1 , wherein the welded joint is formed via capacitor discharge welding.3. The high-pressure fuel pump as claimed in claim 1 , wherein the receiving space is wider than the weld bead when viewed in a radial direction.4. The high-pressure fuel pump as claimed in claim 1 , wherein the receiving space is an annular space.5. The high-pressure fuel pump as claimed in claim 1 , further comprising an opening that connects the receiving space to an environment.6. The high-pressure fuel pump as claimed in claim 1 , wherein the receiving space is further formed by a recess in the pump housing.7. The high-pressure fuel pump as claimed in claim 1 , wherein the receiving space is further formed by a recess in the fixing flange.8. The high-pressure fuel pump as claimed in claim 1 , wherein the pump housing includes a relief cut that has a smaller diameter than a contact section of the pump housing claim 1 , and wherein the contact section makes contact with the fixing flange.9. The high-pressure fuel pump as claimed in claim 8 , wherein the contact between the contact section and the fixing flange is a press fit. The ...

HIGH PRESSURE FUEL PUMP AND FUEL SUPPLY DEVICE FOR AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR OF A MOTOR VEHICLE

The invention relates to a fuel supply device for supplying fuel to a first injection device of an internal combustion engine, in particular of a motor vehicle, having at least one first low-pressure port, via which the fuel can be fed to the high-pressure fuel pump from a low-pressure fuel pump, having at least one second low-pressure port for conducting the fuel conveyed by means of the low-pressure fuel pump and fed to the high-pressure fuel pump away from the high-pressure fuel pump to a second injection device provided in addition to the first injection device, having a pump housing as first structural element, and having a second structural element, which is formed separately from the pump housing and which is held on the pump housing, wherein both low-pressure ports are arranged on one of the structural elements. 1. A high-pressure fuel pump for supplying fuel to a first injection device of an internal combustion engine , in particular of a motor vehicle , having at least one first low-pressure port , via which the fuel can be fed to the high-pressure fuel pump from a low-pressure fuel pump , having at least one second low-pressure port for conducting the fuel conveyed by means of the low-pressure fuel pump and fed to the high-pressure fuel pump away from the high-pressure fuel pump to a second injection device provided in addition to the first injection device , having a pump housing as first structural element , in which there is arranged at least one conveying element which is movable relative to the pump housing and which serves for conveying the fuel to the first injection device , and having at least one second structural element , which is formed separately from the pump housing and which is held on the pump housing ,characterized in thatboth low-pressure ports are arranged on one of the structural elements.2. The high-pressure fuel pump as claimed in claim 1 ,characterized in thatthe low-pressure ports are fluidically connected to one another by means ...

HIGH-PRESSURE FUEL PUMP

The invention relates to a high-pressure fuel pump (), in particular of a common rail injection system of an internal combustion engine, having a pump cylinder head (), having an intake valve () arranged in the pump cylinder head () in the direction of a pump cylinder axis, and a high-pressure fuel outlet () arranged laterally on the pump cylinder head (), wherein a protective cap () at least partly covering the high-pressure fuel pump () is provided. According to the invention, a high-pressure fuel pump () having a protective cap () is provided, in which the protective cap () can be mounted without difficulty on an assembled high-pressure fuel pump (). This is achieved in that a plug () having a lateral lead connection () is placed on the electrically operated intake valve (), and the protective cap () is formed in two pieces and has two protective cap parts () that can be fitted to each other, or else in that a plug () having a lateral lead connection () is placed on the electrically operated intake valve (), and the protective cap () is formed annularly and has a free clearance slot () interrupting the ring. 11. A high-pressure fuel pump () , comprising{'b': '3', 'a pump cylinder head (),'}{'b': 6', '3, 'a suction valve () arranged in a direction of a pump cylinder axis in the pump cylinder head (),'}{'b': 5', '3, 'a high-pressure fuel outlet () arranged laterally on the pump cylinder head (), and'}{'b': 10', '1, 'a protective cap () which at least partially covers the high-pressure fuel pump (),'}{'b': 8', '9', '6', '10', '11', '11, 'i': b,', 'a, 'wherein an electrical plug () with a lateral line connector () is mounted onto the electrically actuated suction valve (), and wherein the protective cap () is formed in two parts and has first and second protective cap parts ().'}21. The high-pressure fuel pump () as claimed in claim 1 ,{'b': 11', '11', '13', '5, 'i': a,', 'b, 'characterized in that the first protective cap part () has a recess () which surrounds the ...

High-Pressure Fuel Pump

A high-pressure fuel pump includes a pump housing and a cover element. The cover element is connected to the pump housing and has a wall. A damping volume is arranged between the cover element and the pump housing. The wall has a reinforcement, which is formed such that a resonant frequency of the cover element lies above 9 kHz, preferably above 11 Hz, in particular above 12 kHz. 1. A high-pressure fuel pump , comprising:a pump housing; anda cover element connected to the pump housing and including a wall,wherein a damping volume is arranged between the cover element and the pump housing, andwherein the wall includes a stiffening element configured such that a resonance frequency of the cover element is above 9 kHz.2. The high-pressure fuel pump as claimed in claim 1 , wherein:the stiffening element of the wall is formed by curved regions of the wall; andthe curved regions run at least in a radial direction and include a respective center of curvature on a side of the damping volume.3. The high-pressure fuel pump as claimed in claim 1 , further comprising: the cover element;', 'a membrane damper arranged between the cover element and the pump housing;', 'a support element configured to support the membrane damper on the pump housing and spaced apart in a vertical direction from the pump housing; and', 'a spring element configured to support the membrane damper on the cover element and spaced apart in the vertical direction from the cover element., 'a damper device including4. The high-pressure fuel pump as claimed in claim 1 , wherein the wall of the cover element includes a first section that runs in an axial direction claim 1 , and a second section that runs substantially in a radial direction.5. The high-pressure fuel pump as claimed in claim 4 , wherein the first section of the wall includes claim 4 , at an end of the first section averted from the second section claim 4 , a radially internally situated beveled region configured to join the cover element to the ...

HIGH-PRESSURE FUEL PUMP FOR A FUEL INJECTIN SYSTEM

The invention relates to a high-pressure fuel pump having a pump piston and having a piston rotation inducing device which induces a rotation of the pump piston about a movement axis, along which the pump piston moves in translational fashion, during the operation of the pump piston 1. A high-pressure fuel pump for applying high pressure to a fuel in a fuel injection system comprising:a housing defining a housing bore and a guide bore;a pressure chamber formed at one end region of the housing bore in which high pressure is applied to the fuel, and wherein the guile bore adjoins the end region;a pump piston, guided by the guide bore, wherein the pump piston is translatable in the guide bore along a movement axis during the operation of the high-pressure fuel pump; anda piston rotation inducing device which a rotation of the pump piston about the movement axis during the operation of the pump piston.2. The high-pressure fuel pump of claim 1 , wherein a piston clearance is defined between a guide wall of the guide bore and a piston shell surface of the pump piston claim 1 , and through which leakage fuel flows out of the pressure chamber parallel to the movement axis during the operation of the pump piston.3. The high-pressure fuel pump of claim 2 , wherein the piston shell surface has a surface structure which interacts with the flowing leakage fuel such that the pump piston rotates about the movement axis4. The high-pressure fuel pump of claim 3 , wherein the surface structure extends over the piston shell surface parallel to the movement axis of the pump piston.5. The high-pressure fuel pump of claim 4 , wherein the surface structure extends over a full length the piston shell surface parallel to the movement axis.6. The high-pressure fuel pump of claim 3 , wherein the surface structure is arranged helically on the piston shell surface.7. The high-pressure fuel pump of claim 6 , wherein a helix gradient of the surface structure is of a magnitude such that said ...

DIGITAL INLET VALVE

A digital inlet valve is the complementary assembly of an armature module, a body module and an actuation module enabling direct control over an air gap between a magnetic armature and a pole piece body. 117-. (canceled)18. A magnetic armature module of a digital inlet valve (DIV) , the DIV also having a body module and an actuation module , the magnetic armature module , the body module , and the actuation module forming the DIV and cooperating , in use , with an inlet valve member of a fuel pump , the inlet valve member commuting between an open state and a closed state to control fuel inlet into a compression chamber of the fuel pump , the magnetic armature module comprising:a magnetic armature member having a cylindrical base portion and an elongated shaft, the elongated shaft protruding from a top face of the cylindrical base portion and extending along a main axis toward a distal end;a tubular cylindrical sleeve having an outer cylindrical face axially extending from an under face to a top face of the tubular cylindrical sleeve, the tubular cylindrical sleeve also having an axial through bore opening in both the under face and the top face of the tubular cylindrical sleeve, the tubular cylindrical sleeve being slidably arranged on the elongated shaft engaged in the axial through bore, the under face of the tubular cylindrical sleeve facing the top face of the cylindrical base portion of the magnetic armature member,a flange socket forming a spring seat provided with a disc-like flange portion radially extending from a central portion provided with an axial opening engaged and fixed on the elongated shaft, the disc-like flange portion radially extending from the elongated shaft and having an under face facing the top face of the tubular cylindrical sleeve and also having a top face adapted to receive a coil spring;wherein the flange socket is fixed in a position enabling the tubular cylindrical sleeve to freely translate along the elongated shaft between a ...

High-Pressure Fuel Supply Pump

A fuel pump includes an electromagnetically driven intake valve mechanism, a pump housing, a discharge valve, an opening, a seal member, and a first relief passage. The relief valve mechanism has a relief valve, a relief valve seat contacting the relief valve when the relief valve is closed and a relief spring biasing the relief valve against the relief valve seat. A second relief passage, communicating the first relief passage and a hole formed in the relief seat, is formed between the seal member and the relief valve seat. The relief valve seat, the relief valve, and the relief spring are arranged in this order beginning from the open end side. 1. A fuel pump comprising:an electromagnetically driven intake valve mechanism that includes a plunger rod;a pump housing formed with a discharge path in communication with a compression chamber;a discharge valve arranged in the discharge path;an opening formed in the pump housing in which a relief valve mechanism is arranged;a seal member closing an open end of the opening; the relief valve mechanism has a relief valve, a relief valve seat contacting the relief valve when the relief valve is closed and a relief spring biasing the relief valve against the relief valve seat,', 'a second relief passage communicating the first relief passage and a hole formed in the relief seat is formed between the seal member and the relief valve seat, and', 'the relief valve seat, the relief valve, and the relief spring are arranged in this order beginning from the open end side., 'a first relief passage communicating a downstream side of the discharge valve with the opening; wherein.'}2. The fuel pump according to claim 1 , wherein the opening of the pump body has a bottom formed by the pump body claim 1 , and the relief valve seat claim 1 , the relief valve claim 1 , the relief spring and the bottom of the opening are arranged in this order beginning from the open end side.3. The fuel pump according to claim 1 , wherein a longitudinal ...

Method for Producing a High-Pressure Fuel Pump

A method for producing a high-pressure fuel pump includes bringing a pump housing into contact with a lower electrode, gripping a pot-shaped cover element using a collet chuck, contacting the cover element with an electrode, bringing the open face of the cover element into contact with the face of the pump housing opposite the lower electrode, centering the cover element on the face of the pump housing opposite the lower electrode, pressing the cover element onto the pump housing in the direction of the lower electrode, and introducing an electrical current from the electrode via the cover element and the pump housing into the lower electrode, such that fusing occurs at the point of contact between the cover element and the pump housing, and such that subsequently the cover element is bonded to the pump housing. The pump housing and the cover element are connected by a peripheral weld seam. 1. A method for producing a high-pressure fuel pump including a pump housing and a cup-shaped cover element , the pump housing and the cover element connected to each other by an encircling weld seam , the method comprising:bringing the pump housing into contact with a bottom electrode;gripping the cup-shaped cover element with a collet chuck;contacting the cup-shaped cover element with another electrode;bringing an open side of the cup-shaped cover element into contact with a first side of the pump housing which lies opposite the bottom electrode;centering the cup-shaped cover element on the first side of the pump housing which lies opposite the bottom electrode;pressing the cup-shaped cover element onto the pump housing in a direction of the bottom electrode; andintroducing an electrical current from the other electrode via the cup-shaped cover element and the pump housing into the bottom electrode, such that melting occurs at a contact point between the cup-shaped cover element and the pump housing and then the cup-shaped cover element is connected to the pump housing in an ...

Motorcycle Engine with Direct Fuel Injection

An air cooled V-twin engine comprises first and second cylinders, first and second cylinder heads, first and second fuel injectors, a fuel tank, and first and second fuel pumps. The cylinders and the cylinder heads comprise cooling fins and define first and second combustion chambers. Each of the fuel injectors is attached to a respective one of the cylinder heads in a manner such that they can discharge fuel directly into said combustion chamber. The first fuel pump is operatively connected to the fuel tank and to the second fuel pump in a manner such that the first fuel pump can pump fuel from the fuel tank to the second fuel pump. The second fuel pump is operatively connected to the fuel injectors in a manner such that the second fuel pump can pump fuel to the fuel injectors. 1. An air cooled V-twin engine comprising first and second cylinders , first and second cylinder heads , first and second fuel injectors , a fuel tank , and first and second fuel pumps , the first and second cylinders and the first and second cylinder heads comprising air cooling fins and defining first and second respective combustion chambers , the first and second fuel injectors being attached to the first and second cylinder heads respectively in a manner such that the first and second fuel injectors can discharge fuel directly into the first and second combustion chambers respectively , the first fuel pump being operatively connected to the fuel tank and to the second fuel pump in a manner such that the first fuel pump can pump fuel from the fuel tank and supply fuel to the second fuel pump , the second fuel pump being operatively connected to the first and second fuel injectors in a manner such that the second fuel pump can pump fuel to the first and second fuel injectors.2. An air cooled V-twin engine in accordance with wherein the engine comprises a cam shaft and the first and second cylinders are aligned with each other peripedicular to the cam shaft claim 1 , the cam shaft ...

HIGH-PRESSURE FUEL SUPPLY PUMP

An object of the present invention is to supply a high-pressure fuel supply pump capable of holding a spring holding member while reducing the height of the pump body. 1: A high-pressure fuel supply pump comprising: a pump body configured to form a pressurizing chamber at an inner wall portion; and a flange portion configured to fix the pump body to a high-pressure fuel supply pump mounting portion ,the high-pressure fuel supply pump, comprising:a cylinder which is inserted into a hole portion of the pump body from a lower side and in which the pressurizing chamber is formed further above an uppermost end surface; anda spring holding member having an outer peripheral portion press-fitted and fixed to the pump body and a holding portion holding a spring portion for biasing the pump body between the outer peripheral portion and the inner peripheral portionwherein a spring-side lowest end portion of a holding surface of the spring holding member is disposed above a lowermost end portion of the flange portion.2: A high-pressure fuel supply pump comprising: a pump body configured to form a pressurizing chamber at an inner wall portion; and a flange portion configured to fix the pump body to a high-pressure fuel supply pump mounting portion ,wherein the pump body is provided with a first hole having a first cross sectional area forming the pressurizing chamber, a second hole communicating with the first hole, being formed on the side opposite to the pressurizing chamber, and having a second cross sectional area larger than the first cross sectional area, and a third hole communicating with the second hole, being formed on the side opposite to the pressurizing chamber, and having a third cross sectional area larger than the second cross sectional,the high-pressure fuel supply pump comprises:a cylinder which is inserted from the opposite side of the pressurizing chamber toward the pressurizing chamber and whose uppermost end surface is in contact with an upper end surface ...

METHOD FOR CONTROLLING A DUAL LIFT PUMP FUEL SYSTEM

Methods and systems are provided for operating a fuel system comprising two lift pumps. In one example, a method may comprise adjusting operation of a first lift pump to achieve a desired fuel rail pressure. The method may comprise powering on a second lift pump to achieve the desired fuel rail pressure when operating only the first lift pump is not sufficient to achieve the desired fuel rail pressure. 1. A method comprising:adjusting operation of a first lift pump based on a difference between a desired fuel rail pressure and a measured fuel rail pressure; andin response to one or more of an accelerator pedal tip-in, desired fuel rail pressure increasing above a threshold pressure, and the difference between the desired fuel rail pressure and the measured fuel rail pressure increasing by more than a threshold difference, powering on a second lift pump.2. The method of claim 1 , wherein the adjusting operation of the first lift pump comprises adjusting an amount of electrical power supplied to a motor of the first lift pump.3. The method of claim 2 , wherein the adjusting the amount of electrical power supplied to the motor of the first lift pump monotonically increases for increases in the difference between the desired fuel rail pressure and the measured fuel rail pressure when the measured fuel rail pressure is less than the desired fuel rail pressure.4. The method of claim 1 , wherein the adjusting operation of the first lift pump comprises adjusting a duty cycle of the first lift pump.5. The method of claim 1 , further comprising claim 1 , powering off the first lift pump in response to the measured fuel rail pressure increasing above the desired fuel rail pressure.6. The method of claim 1 , further comprising claim 1 , powering off the second lift pump and only continuing to supply power to the first lift pump in response to the difference between the desired fuel rail pressure and the measured fuel rail pressure decreasing below the threshold difference.7. ...

Internal combustion engine and method for manufacturing internal combustion engine

A high-pressure fuel pump and a protector are coupled to an outer side of an engine body of an internal combustion engine. A wall plate surrounds the high-pressure fuel pump to protect the high-pressure fuel pump. A cover of the high-pressure fuel pump has a flange. The engine body has a mounting surface. The bottom plate and the flange are fastened to the mounting surface by a bolt with the bottom plate held between the flange and the mounting surface.

COMPONENT HAVING HIGH-PRESSURE BORES THAT LEAD INTO ONE ANOTHER

In a component (), in particular a housing of a high-pressure fuel pump, in which at least one first high-pressure channel () and one second high-pressure channel () are present, the longitudinal axis of the first channel () is at an acute or right angle to the longitudinal axis of the second channel (), wherein the second channel () leads into the first channel (), such that an intersection is formed. The first channel () is formed by a central bore () and at least one secondary bore () that enlarges the cross-section of the central bore (), wherein the longitudinal axis of the secondary bore () and the longitudinal axis of the central bore () extend parallel to one another. The central bore () passes through ugh the component () and consists of a first segment () connected to the first segment, wherein the at least one secondary bore () extends only along the first segment () and no secondary bore is provided along the second segment (). 1101891189. A component comprising a first high-pressure channel and at least one second high-pressure channel , a longitudinal axis of the first channel being at an acute or right angle to a longitudinal axis of the second channel and the second channel leading into the first channel , such that an intersection is formed , wherein the first channel is formed by a central bore and at least one secondary bore that enlarges a cross-section of the central bore , a longitudinal axis of the secondary bore and a longitudinal axis of the central bore extending parallel to one another , characterized in that the central bore () passes through the component () and consists of a first segment () extending over the intersection and a second segment () connected to the first segment , and in that the at least one secondary bore () extends only along the first segment () and no secondary bore is provided along the second segment ().2111010. The component according to claim 1 , characterized in that respectively one secondary bore () that ...

Valve mechanism and high-pressure fuel supply pump including valve mechanism

Provided is a solution to a problem on a discharge valve mechanism disposed at an exit of a pressurizing chamber of a high-pressure fuel supply pump, that is, an occurrence of a backward flow of the fuel concentrates on a limited fuel passage, leading to a higher fuel flow rate, and this easily induces the occurrence of cavitation, and collapse of the generated cavitation might damage a seat surface, making it difficult to maintain valve functions. The present invention provides a valve mechanism including a seat member having a seat section, a valve body configured to attach to or detached from the seat section, and a housing member arranged on an outer peripheral side of the seat member. A first fluid flow-path is formed to connect an inner peripheral side and an outer peripheral side of the seat section in a case where the valve is detached from the seat section. A second fluid flow-path is formed to be connected with the first fluid flow-path, between an outer peripheral surface of the seat member and an inner peripheral surface of the housing member, or between an outer peripheral surface of the valve body and the inner peripheral surface of the housing member. The cross-sectional area along the axial direction of the valve mechanism of the second fluid flow-path is 0.18 mm square or above.

HIGH-PRESSURE PUMP

The invention relates to a high-pressure pump (), in particular for a motor vehicle, for conveying a fluid, in particular fuel, e.g. diesel fuel, comprising a drive shaft having at least one cam, at least one piston, at least one cylinder () for mounting the at least one cam, wherein the at least one piston is supported on the drive shaft by the at least one cam, so that a translational motion can be carried out by the at least one cam as a result of a rotary motion of the drive shaft, at least one cover cap (), which is attached indirectly or directly to the outside of the cylinder (), wherein one end () of the at least one cover cap () rests on a projection () of the remaining high-pressure pump () for the interlocking attachment of the end () of the cover cap () to the projection (). 11. A high pressure pump () for delivering a fluid , the high pressure pump comprising{'b': 2', '3, 'a drive shaft () with at least one cam (),'}{'b': '5', 'at least one piston (),'}{'b': 6', '5, 'at least one cylinder () in which the at least one piston () is mounted,'}{'b': 5', '2', '3', '5', '2, 'the at least one piston () being supported on the drive shaft () with the at least one cam (), with the result that a translational movement can be carried out by the at least one piston () on the basis of a rotational movement of the drive shaft (), and'}{'b': 8', '6, 'at least one covering cap () which is fastened indirectly or directly to the cylinder () on an outer side,'}characterized in that{'b': 18', '8', '16', '1', '18', '8', '16, 'an end () of the at least one covering cap () lies on a projection () of the high pressure pump () in order to fasten the end () of the covering cap () to the projection () in a positively locking manner.'}2161164216411761884316. The high pressure pump as claimed in claim 1 , characterized in that the projection () is configured on the high pressure pump () on the outer side and/or the projection () is configured as an undercut () and/or the projection ...

FUEL PUMP WITH INDEPENDENT PLUNGER COVER AND SEAL

A fuel pump for an internal combustion engine comprising a barrel having a longitudinal axis that spans between a proximal end and a distal end and a central bore therein. A plunger is disposed at least partially in the central bore and is configured to move along the longitudinal axis. An annular seal assembly is arranged around the circumference of the plunger wherein the annular seal assembly includes a seal retainer housing and a first seal and the seal retainer housing also retains the proximal end of the barrel thereon to form a second seal wherein the first and the second seals reduce the fuel to oil transfer rate and the oil to fuel transfer rate. The plunger and barrel are configured to be removed from and re-assembled with the annular seal assembly to enable service of these parts and the fuel pump. 1. A fuel pump comprising:a barrel having a longitudinal axis that spans between a proximal end and a distal end, the barrel including a central bore along the longitudinal axis;a plunger disposed at least partially in the central bore, the plunger configured to move along the longitudinal axis;an annular seal assembly arranged around the circumference of the plunger, the annular seal assembly including a seal retainer housing and a first seal, the seal retainer housing is configured to retain the proximal end of the barrel thereon such that the proximal end of the barrel forms a second seal with the seal retainer housing; anda coil spring having a proximal end opposite a distal end, wherein the proximal end is assembled with the plunger and the distal end is assembled with the annular seal assembly to urge the annular seal assembly towards the barrel.2. The fuel pump of claim 1 , wherein the first seal is configured to prevent fluid in the tappet bore from movement into the central bore of the barrel claim 1 , and the second seal is configured to prevent fluid in the central bore from movement into the tappet bore.3. The fuel pump of claim 1 , further ...

Electrically controlled fuel injection pump for internal combustion engines in particular unit fuel injector

An electrically controlled fuel injection pump for internal combustion engines having a pump piston disposed and guided in a pump housing and defining a pump chamber and in its pumping stroke pumping fuel, delivered to this pump work chamber by a feed pump to an injection nozzle as long as a quantity control valve blocks the flow of the fuel otherwise overflowing from the pump work chamber via a metering line to a low-pressure chamber. A housing part receiving the quantity control valve and projecting laterally from the pump housing at the level of the pump housing, into which part the metering line leading to the pump work chamber extends, wherein lateral recesses on the projecting housing part are provided, which are engaged in forked fashion by a fastening cuff for the quantity control valve. The fastening cuff being provided with an internal thread and cooperating with a screw sleeve having an external thread.

ELECTRICALLY CONTROLLED FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES, IN PARTICULAR PUMPEDUESE

An electrically controlled fuel injection pump for internal combustion engines, especially a pump nozzle, with a pump piston (12) arranged and guided in a pump housing (11) which limits a pump working chamber (15) and on the feed stroke, takes the fuel fed into this working chamber (15) by a feed pump to an injection nozzle as long as a quantity control valve (26) blocks the flow of the fuel otherwise flowing from the working chamber (15) via a metering line (25) to a low-pressure chamber (21), with a casing section (27) laterally surrounding and projecting beyond the pump housing (11) at the level of the piston (12) and housing the metering control valve (26) into which penetrates the metering line (25) leading to the working chamber (15), whereby the projecting part of the casing (27) has lateral recesses with which engages a securing socket (28) with an internal thread (30) for the metering control valve (26) co-operating with a sleeve (32) having an external thread (31).

High pressure pump

A high pressure fluid pump for use such as a fuel injection pump. The pump utilizes a diaphragm for cooperation with valve controlled passage structure leading to the pump chamber to provide the desired high pressure output. The diaphragm is defined by one portion of a diaphragm element, which portion is sealingly bonded peripherally to the wall of the valve body defining the valve chamber. A second portion of the diaphragm element formed unitarily integrally with the diaphragm portion is free to move in the valve chamber and includes a portion extending into a plunger bore for transmitting forces from a reciprocating plunger having an inner end extending into the bore to the diaphragm. The plunger further is provided with a synthetic resin tip. The plunger and tip are arranged to be lubricated during reciprocation of the plunger. A force transfer element extends between the tip and the portion of the diaphragm element extending into the bore and transfers the intermittent pumping force from the plunger tip to the diaphragm element. The diaphragm element may be formed of a flexible material which is self-bonding to the wall of the pump body.

High-pressure fuel pump and assembly structure of high-pressure pump

A high pressure pump for decreasing an initial axial force of a clamping bolt and preventing distortion of a sealing surface and a cylinder form. The high pressure pump has an intermediate member including a cylinder body ( 4 ). The cylinder body has a pressurizing chamber ( 14 ) communicated with a cylinder ( 4 a ) accommodating a plunger ( 12 ). Fluid in the pressurizing chamber is pressurized by reciprocating the plunger. The intermediate member is arranged between a cover ( 6 ) and a flange ( 8 ) and clamped by a clamping bolt ( 40 ). The clamping bolt has an exposed area ( 40 a ) at its axially central area where the entire periphery of the clamping bolt is exposed from the cover and the flange. One or both of the cover and the flange clamp the intermediate member with a flexing elastic force.

High-pressure fuel pump and assembly structure of high-pressure pump

A high pressure pump for decreasing an initial axial force of a clamping bolt and preventing distortion of a sealing surface and a cylinder form. The high pressure pump has an intermediate member including a cylinder body. The cylinder body has a pressurizing chamber communicated with a cylinder accommodating a plunger. Fluid in the pressurizing chamber is pressurized by reciprocating the plunger. The intermediate member is arranged between a cover and a flange and clamped by a clamping bolt. The clamping bolt has an exposed area at its axially central area where the entire periphery of the clamping bolt is exposed from the cover and the flange. One or both of the cover and the flange clamp the intermediate member with a flexing elastic force.

高圧燃料供給ポンプ

(57)【要約】 【課題】 シリンダ摺動部におけるプランジャとの摺動 面の変形をなくし、プランジャの焼付きを防止すると共 にシール性を向上する。 【解決手段】 ポンプ本体１７に螺着される締付部材で あるデリバリバルプ１０と、このデリバリバルブ１０と ポンプ本体１７との間に装着されポンプ本体１７とデリ バリバルブ１０との螺着の際に長手方向の圧縮力を受け る固定部３３とこの固定部３３に連って長手方向に延長 された摺動部３４とを有するシリンダ３２と、このシリ ンダ３２の摺動部３４内を往復運動可能に設けられたプ ランジャ２３と、このプランジャ２３を駆動するカム２ ７とを備え、シリンダ３２の固定部３３にスリット３５ を設けたものである。

電磁作動弁

(57)【要約】 【課題】 弁の作動中弁部材と極片との間に発生する衝 撃力に耐えるため、また極片における残留磁気の特定の 水準を得るため、硬くかつ比較的低い磁気特性を備えた 材料をコーティングされた、電磁作動弁の極片およびア マチユアを得ること。 【解決手段】 高圧流体の流れを迅速に切替えるため利 用される電磁作動弁が遭遇する課題は、アマチユア部材 １４の端面と極片１６，１８の座に発生する損傷であ る。本発明はこの課題を弁部材１４の少なくとも一部お よび弁部材が接触する極片１６，１８の少なくとも一部 のいずれか一方または双方に、アマチユアおよび極片の いずれか一方または双方より大きい機械的高度または小 さい透磁率を有する材料の層２６を設けることによって 克服した。

High pressure fuel supply pump

Plunger pump

Method of assembling fuel injector pump components

Methods of swaging fuel injector pump components are provided. A method of securing an armature plate to a control valve of a solenoid-actuated fuel injector pump comprises: (1) providing a control valve stem extending from the control valve, the stem having a body with a body width, a head with a head width narrower than the body width, and a neck with a neck width narrower than the head width, the neck forming an annular groove between the head and body; (2) providing a central aperture formed in the armature plate having an aperture width between the head and body widths; and (3) forcing the stem into the central aperture in a manner to cause a portion of the armature plate to deform into the groove to secure the armature plate to the stem. Also provided is a method of plugging a fuel flow passage in a fuel injector pump body, comprising: (1) providing a plug; (2) inserting the plug at least partially into the passage; and (3) swaging the plug into the passage in a manner to deform a portion of the pump body around the plug to secure the plug in the passage.

High pressure pump

用于直接喷射系统的燃料泵

一种用于直接喷射系统的燃料泵(4)，该直接喷射系统具有公共轨道(3)；燃料泵(4)包括：在主体(12)中限定出的至少一个泵室(14)；可滑动地安装在泵室(14)内的活塞(15)；连接到泵室(14)并由导入阀(18)调节的导入通道(17)；连接到泵室(14)并由导出阀(20)调节的导出通道(19)；及在导出通道(19)处由环形焊缝(26)焊接到主体(12)的壁部的高压接头(25)，该高压接头具有允许连接到供给管(5)的功能，该供给管输入加压燃料到公共轨道(3)，且该高压接头在内部具有贯穿通道(27)，通过该贯穿通道，来自导出通道(19)的燃料朝向供给管(5)流动。

High-pressure pump

클램핑 볼트의 초기 축력을 감소시키고 밀봉면과 실린더 형태의 뒤트림을 방지하기 위한 고압 펌프. 이 고압 펌프는 실린더 몸체(4)를 포함하는 중간부재를 가진다. 실린더 몸체는 플런저(12)를 수용하는 실린더(4a)와 교통하는 압축실(14)을 가진다. 압축실내의 유체는 플런저를 왕복운동시킴으로써 압축된다. 중간부재는 커버(6)와 플랜지(8) 사이에 배치되며 클램핑 볼트(40)에 의해 클램프된다. 클램핑 볼트는 그 축방향 중앙영역에서 이 볼트의 전제 주변이 커버와 플랜지로부터 노출되는 노출영역(40a)을 가진다. 커버와 플랜지중 하나 또는 둘다는 중간부재를 굴곡 탄성력으로 클램프한다. High pressure pump to reduce the initial axial force of the clamping bolt and to prevent twisting of the sealing surface and cylinder form. This high pressure pump has an intermediate member comprising a cylinder body 4. The cylinder body has a compression chamber 14 in communication with the cylinder 4a which receives the plunger 12. The fluid in the compression chamber is compressed by reciprocating the plunger. The intermediate member is disposed between the cover 6 and the flange 8 and clamped by the clamping bolt 40. The clamping bolt has an exposed area 40a in its axial central area, the entire periphery of the bolt being exposed from the cover and the flange. Either or both of the cover and the flange clamp the intermediate member with flexural force. 고압펌프. 플런저, 중간부재, 클램핑부재, 클램핑볼트, 조립구조. High pressure pump. Plunger, intermediate member, clamping member, clamping bolt, assembly structure.

Kraftstofffördereinrichtung für kryogene Kraftstoffe

Die Erfindung betrifft eine Kraftstofffördereinrichtung für kryogene Kraftstoffe, umfassend eine Hochdruckpumpe (1) mit einem Gehäuseteil (2), in dem ein zylinderförmiger Kompressionsraum (3) ausgebildet ist, der von einem hin und her beweglichen Kolben (4) begrenzt wird. Erfindungsgemäß ist an das Gehäuseteil (2) im Bereich des Kompressionsraums (3) ein weiteres Gehäuseteil (5) axial angesetzt, so dass ein gemeinsamer Kontaktbereich (6) geschaffen wird, in dem ein metallischer Dichtbereich (6.1) zur Abdichtung gegen den Druck im Kompressionsraum (3) ausgebildet ist.

High pressure pump and assembled structure of high pressure pump

(57)【要約】 【課題】締結ボルトの初期軸力を低くしてシール面やシ リンダ形状に対する歪みを防止することができる高圧ポ ンプおよび高圧ポンプの組み付け構造の提供。 【解決手段】締結ボルト４０の中央領域４０ａは全周に わたって露出している。このことにより締結ボルト４０ の締結力はカバー６およびフランジ８に対しては、周縁 部６ａ，８ａ同士を近づける方向の曲げ応力として作用 し、弾性係数が小さくなる。したがって温度変化による 高圧燃料ポンプ２の各構成の膨張収縮や各構成間の締結 面のへたり等の寸法変化が生じても締結ボルト４０の軸 力変化も小さいものとなる。このため締結ボルト４０の 初期軸力を比較的低くしておいても、製造後における高 圧燃料ポンプ２の各構成の寸法変化に対処できる十分な 軸力を発生させることができる。このことにより、各構 成間のシール面やシリンダ４ａの形状に対する歪みを防 止することができる。

High-pressure fuel supply pump

在为了应对更高的燃料压力而提高溢流阀的开阀压的情况下，设置变大的溢流阀，因此，高压燃料供给泵大型化。将溢流阀设置于排出接头的内部。由此，能够得到一种高压燃料供给泵，其即使在燃料压力更高的情况下，也不使泵本身的大小变得过大，一边有效地利用泵内部的剩余空间，一边发挥充分的溢流功能。

Fuel injection pump

The I.C. engine fuel injection pump conprises a housing (1) contg. a number of reciprocated pistons (4). A mechanism to vary the effective piston stroke comprises a bush (17), which is axially slidable on each piston by means of a rotatable shaft (29). A radial projection (36) engages a recess (22) in the nonrotatable bush. The shaft has a recess (32) which faces the bush and contains a collar (34) of a rotatably adjustable bolt (33). The projection (36) is eccentric relative to this bolt.