FR2904665A1 - TRANSFER PUMP FOR HIGH PRESSURE FUEL INJECTION - Google Patents

TRANSFER PUMP FOR HIGH PRESSURE FUEL INJECTION Download PDF

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Publication number
FR2904665A1
FR2904665A1 FR0607181A FR0607181A FR2904665A1 FR 2904665 A1 FR2904665 A1 FR 2904665A1 FR 0607181 A FR0607181 A FR 0607181A FR 0607181 A FR0607181 A FR 0607181A FR 2904665 A1 FR2904665 A1 FR 2904665A1
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FR
France
Prior art keywords
piston
cam
oil
pump according
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR0607181A
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French (fr)
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FR2904665B1 (en
Inventor
Florent Sellas
Eric Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Automotive Hydraulics SA
Original Assignee
Siemens Automotive Hydraulics SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Automotive Hydraulics SA filed Critical Siemens Automotive Hydraulics SA
Priority to FR0607181A priority Critical patent/FR2904665B1/en
Priority to DE602007003414T priority patent/DE602007003414D1/en
Priority to AT07290936T priority patent/ATE449905T1/en
Priority to EP07290936A priority patent/EP1884656B1/en
Priority to US11/878,975 priority patent/US20080175731A1/en
Priority to JP2007201770A priority patent/JP2008038909A/en
Priority to KR1020070078198A priority patent/KR20080012799A/en
Publication of FR2904665A1 publication Critical patent/FR2904665A1/en
Application granted granted Critical
Publication of FR2904665B1 publication Critical patent/FR2904665B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0413—Cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/084—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular member being deformed by stretching or distortion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The pump has a drive shaft (1) driven by a free wheel mechanism (3). An oil part comprises a cam (5), lobes (6), a part of the drive shaft that supports the cam, a roller (7) with a shaft (8) and a rolling bearing (9) that is supported by a support part, and an upper part of a piston (10). The cam is supported on the piston by using the roller. The oil part is provided such that the cam, roller and the bearing and angle transmission parts are immersed in oil of the oil part. A lip joint provides sealing between the oil part and the shaft (1).

Description

Perfectionnements aux pompes transfert pour injection d'essence à haute pression Improvements to transfer pumps for injection of high pressure gasoline

La présente invention est relative à des perfectionnements aux pompes pour injection d'essence à haute pression du type comportant un piston refoulant du liquide hydraulique dans un élément déformable tel qu'un soufflet, les déformations dudit soufflet dans une chambre cylindrique remplie de carburant provoquant un effet de pompage dudit carburant vers des injecteurs à haute pression.The present invention relates to improvements to pumps for injection of high pressure gasoline of the type comprising a piston displacing hydraulic fluid in a deformable element such as a bellows, the deformations of said bellows in a cylindrical chamber filled with fuel causing a effect of pumping said fuel to high pressure injectors.

Des pompes de ce type ont été décrites dans les brevets 2.826.068, 2.828.240 et demande de brevet 06/02594 au nom de la demanderesse.Pumps of this type have been described in patents 2,826,068, 2,828,240 and patent application 06/02594 in the name of the applicant.

La présente invention a pour objet d'apporter une solution à deux problèmes que pose le montage de ce type de pompe sur des moteurs.The present invention aims to provide a solution to two problems that the mounting of this type of pump on motors.

Le premier problème provient de ce que sur certains moteurs il est nécessaire d'intégrer la pompe d'injection directe à haute pression en bout de l'arbre à cames ou sur les poulies de transmission et non pas directement sur la culasse. Dans le cas d'une utilisation d'une pompe mono-piston un renvoi d'angle est nécessaire ce qui entraîne des inconvénients divers tels que : encombrement de la pompe, nécessité d'un boîtier d'adaptation, moyens de lubrification, bruits, usure des éléments etc.. Le deuxième problème provient de ce que pour un tel montage il est nécessaire de prévoir un jeu de fonctionnement entre le moyen d'entraînement de la pompe et celle-ci, du type joint de Oldham par exemple. Lorsque la pompe est mono-piston, il se produira des variations importantes du couple résistif de la pompe, avec même, éventuellement des pics négatifs, variations pouvant entraîner un décollement des faces en contact qui transmettent le couple, décollement qui est générateur de retours de couple dans l'arbre moteur. Ces retours de couple constituent un élément perturbateur pour le fonctionnement du moteur tels que : à-coups de couple sur l'arbre à cames ou chaîne de distribution, bruits inacceptables. La solution du premier problème consiste à concevoir la pompe de façon que la partie huile comprenne non seulement la partie pompage mais aussi toute la partie entraînement et renvoi d'angle.The first problem is that on some engines it is necessary to integrate the high-pressure direct injection pump at the end of the camshaft or on the transmission pulleys and not directly on the cylinder head. In the case of use of a single-piston pump, an angle gear is necessary, which entails various disadvantages such as: bulkiness of the pump, need for an adaptation box, lubrication means, noise, wear of the elements etc. The second problem stems from the fact that for such an assembly it is necessary to provide a running clearance between the driving means of the pump and the latter, of the Oldham seal type, for example. When the pump is single-piston, there will be significant variations in the resistive torque of the pump, with even, possibly negative peaks, variations that can lead to detachment of the contacting faces that transmit the torque, detachment that is generating returns of torque in the motor shaft. These torque returns are a disruptive element for the operation of the engine such as: torque surges on the camshaft or timing chain, unacceptable noise. The solution to the first problem is to design the pump so that the oil part includes not only the pumping part but also the entire drive and angle transmission part.

Cela présente comme avantages : d'une part la suppression d'une étanchéité dynamique en translation sur la pompe mono-piston transfert qui est très encombrante en longueur et difficile à maîtriser ; d'autre part toute la partie éléments d'entraînement sera parfaitement lubrifiée. De plus l'augmentation du volume d'huile fermé améliore la tenue dans le temps de l'huile et diminue les risques d'échauffement. La solution du deuxième problème consiste à disposer une roue libre entre l'arbre d'entraînement et la came.This has the following advantages: on the one hand the suppression of a dynamic seal in translation on the single-piston transfer pump which is very bulky in length and difficult to control; On the other hand the whole part driving elements will be perfectly lubricated. In addition, the increase in the volume of closed oil improves the resistance over time of the oil and reduces the risk of overheating. The solution of the second problem is to have a free wheel between the drive shaft and the cam.

A titre d'exemple non limitatif et pour faciliter la compréhension de l'invention on a représenté aux dessins annexés :By way of nonlimiting example and to facilitate the understanding of the invention, the attached drawings show:

- la figure 1 est une vue en coupe d'un mode de réalisation de la pompe transfert selon l'invention,FIG. 1 is a sectional view of an embodiment of the transfer pump according to the invention,

- la figure 2 est une vue en coupe selon A-A de la figure 1 ,FIG. 2 is a sectional view along A-A of FIG. 1;

- la figure 3 est une vue partielle illustrant une variante de la figure 2.FIG. 3 is a partial view illustrating a variant of FIG.

En se reportant à ces figures, on voit que la pompe selon l'invention comporte un arbre moteur 1 , relié par un joint Oldham 2 à l'organe d'entraînement (arbre à cames par exemple) non représenté.Referring to these figures, we see that the pump according to the invention comprises a drive shaft 1, connected by an Oldham seal 2 to the drive member (camshaft for example) not shown.

Cet arbre est porté par un boîtier 3.This tree is carried by a housing 3.

Cet arbre porte une came 5, qui, dans l'exemple représenté comporte quatre lobes 6.This shaft carries a cam 5, which in the example shown has four lobes 6.

Un piston 10, vient en appui au moyen d'un ressort 11 , contre la came 5, avec interposition entre le piston 10 et la came 5 d'un galet 7, porté par un arbre 8 par l'intermédiaire d'un roulement à aiguilles 9.A piston 10 is supported by means of a spring 11, against the cam 5, with the interposition between the piston 10 and the cam 5 of a roller 7, carried by a shaft 8 by means of a roller bearing. needles 9.

De préférence une pièce d'appui 12 est interposée entre le galet 7 et le piston 10. Cette pièce d'appui 12 est avantageusement constituée de deux cuvettes inversées 12a, 12b, séparée par une cloison 12c munie d'une pluralité d'orifices 23.Preferably a support piece 12 is interposed between the roller 7 and the piston 10. This support piece 12 advantageously consists of two inverted cups 12a, 12b, separated by a partition 12c provided with a plurality of orifices 23.

La paroi externe de la pièce d'appui 12 comporte des évidements qui facilite le passage de l'huile autour de cette pièce 12. Le piston 10, contretenu par le ressort 11 , coulisse dans un fourreau 13.The outer wall of the support piece 12 has recesses which facilitate the passage of the oil around this piece 12. The piston 10, contretenu by the spring 11, slides in a sleeve 13.

L'extrémité 13a du fourreau 13 pénètre dans un soufflet 14, muni à son extrémité inférieure d'une pièce circulaire 15, contretenue par un ressort de rappel 16.The end 13a of the sleeve 13 enters a bellows 14, provided at its lower end with a circular part 15, contretentioned by a return spring 16.

A l'intérieur du fourreau 13 et à son extrémité est disposé un disque 17 qui comporte en son centre un alésage 19, dans lequel coulisse un doigt 18, porté par ladite pièce circulaire 15, en son centre. Ceci assure un guidage correct du soufflet 14 lors de ses élongations successives. Le guidage du soufflet 14 permet de diminuer et d'ajuster au mieux le diamètre de la chambre 20 dans lequel ledit soufflet se débat ; cette chambre 20 étant remplie de carburant.Inside the sleeve 13 and at its end is disposed a disk 17 which has in its center a bore 19, in which slides a finger 18, carried by said circular part 15 at its center. This ensures correct guidance of the bellows 14 during its successive elongations. The guiding of the bellows 14 makes it possible to decrease and to adjust as best as possible the diameter of the chamber 20 in which said bellows is struggling; this chamber 20 being filled with fuel.

Sur la figure 1 on voit que la came 5 tourne à l'intérieur d'une chambre circulaire 21 ménagée à l'intérieur du boîtier 3.In FIG. 1 it can be seen that the cam 5 rotates inside a circular chamber 21 formed inside the housing 3.

Cette chambre 21 ; l'alésage 22 à l'intérieur duquel coulissent le galet 7, la pièce d'appui 12 et la partie supérieure du piston 10 ; l'alésage interne 10a dudit piston ; l'alésage interne du fourreau 13 et l'intérieur du soufflet 14 sont remplis par le liquide hydraulique. Ce liquide passe autour de la pièce 12 et également à l'intérieur où il traverse la cloison 12a par les orifices 23 ; puis il pénètre dans l'alésage interne 10a du piston 10 par l'orifice 24 et traverse le disque 17 par les orifices 25. Cela assure une bonne communication entre eux des divers éléments remplis d'huile.This room 21; the bore 22 inside which the roller 7, the bearing piece 12 and the upper part of the piston 10 slide; the internal bore 10a of said piston; the internal bore of the sheath 13 and the inside of the bellows 14 are filled by the hydraulic fluid. This liquid passes around the part 12 and also inside where it passes through the partition 12a through the orifices 23; then it enters the internal bore 10a of the piston 10 through the orifice 24 and passes through the disc 17 through the orifices 25. This ensures good communication between them of the various elements filled with oil.

On obtient ainsi un volume relativement important du volume d'huile qui est continuellement pompé ce qui améliore la tenue dans le temps de cette huile et diminue les risques d'échauffement. Pour éviter les effets de pulsations susceptibles d'être provoqués par les déplacements des lobes 6 de la came 5, il peut être avantageux de disposer un compensateur de volume 26, qui communique avec la chambre 21 dans laquelle se débat la came 5 (figure 1 ). Pour la même raison on peut disposer un compensateur de volume 27, qui communique avec l'alésage 22 (figure 2).This gives a relatively large volume of oil that is continuously pumped which improves the resistance of this oil over time and reduces the risk of overheating. To avoid the effects of pulsations likely to be caused by the displacements of the lobes 6 of the cam 5, it may be advantageous to have a volume compensator 26, which communicates with the chamber 21 in which the cam 5 (FIG. ). For the same reason one can have a volume compensator 27, which communicates with the bore 22 (Figure 2).

De plus un clapet anti-retour 28 est disposé dans l'alésage interne 10a du piston 10.In addition, a nonreturn valve 28 is disposed in the internal bore 10a of the piston 10.

Ceci a pour résultat que seule la partie 29 dudit alésage 10a, situé en aval du clapet anti-retour 28 est mise en pression et donc que seul un faible volume d'huile est mis en pression ; alors que le reste du volume d'huile n'est pas mis en pression. Lors du mouvement de remontée du piston 10, sous l'action du ressort de rappel 11 , la communication est rétablie entre l'huile qui a été mise en pression et tout le reste qui ne l'a pas été. Cela contribue à éviter échauffement de l'huile.This has the result that only the portion 29 of said bore 10a, located downstream of the check valve 28 is pressurized and therefore only a small volume of oil is pressurized; while the rest of the volume of oil is not pressurized. During the upward movement of the piston 10, under the action of the return spring 11, communication is restored between the oil which has been pressurized and all the rest which has not been. This helps prevent heating of the oil.

Comme l'arbre 1 est entraîné par un mécanisme à roue libre, les à-coups qui sont transmis à la came 5 ne sont pas transmis à l'arbre d'entraînement 1.As the shaft 1 is driven by a freewheeling mechanism, jolts which are transmitted to the cam 5 are not transmitted to the drive shaft 1.

L'étanchéité de la partie huile de la pompe est assurée par un simple joint à lèvres 30 disposé entre l'arbre 1 et le boîtier 3. Tous les composants de la partie mécanique d'entraînement : came 5, galet 7 et son roulement 9, pièce d'appui 12 coulissant dans l'alésage 22 baignent dans l'huile et sont parfaitement lubrifiés.The sealing of the oil portion of the pump is ensured by a simple lip seal 30 disposed between the shaft 1 and the housing 3. All the components of the mechanical drive part: cam 5, roller 7 and its bearing 9 , bearing piece 12 sliding in the bore 22 are immersed in the oil and are perfectly lubricated.

La figure 3 représente une variante de réalisation de la partie supérieure de la figure 2 illustrant le mécanisme d'entraînement de la came 5. Dans cette figure, les mêmes éléments portent les mêmes références.3 shows an alternative embodiment of the upper part of Figure 2 illustrating the drive mechanism of the cam 5. In this figure, the same elements have the same references.

La came 5 est, dans cet exemple, d'une seule pièce avec l'arbre moteur 1 , la transmission par joint Oldham 2 comportant un mécanisme à roue libre 3. La partie faisant came 5 comporte une cuvette cylindrique 32 dans laquelle vient s'engager un axe cylindrique 31 avec interposition entre ledit axe 31 et la paroi interne de la cuvette d'un élément de guidage.The cam 5 is, in this example, in one piece with the drive shaft 1, the Oldham 2 seal transmission comprising a freewheel mechanism 3. The cam portion 5 comprises a cylindrical bowl 32 in which is engaged a cylindrical axis 31 with interposition between said axis 31 and the inner wall of the bowl of a guide member.

Le roulement 4 portant l'arbre 1 est situé à l'extérieur du boîtier 3, le joint d'étanchéité à lèvres 30 étant dans le boîtier 3, entre le roulement 4 et la came 5.The bearing 4 carrying the shaft 1 is located outside the housing 3, the lip seal 30 being in the housing 3, between the bearing 4 and the cam 5.

Dans cet exemple de réalisation, le roulement 4 n'est pas lubrifié par l'huile hydraulique mais par l'huile du moteur. In this embodiment, the bearing 4 is not lubricated by the hydraulic oil but by the engine oil.

Claims (7)

REVENDICATIONS 1. Pompe transfert pour injection d'essence à haute pression du type comportant un piston (10) refoulant du liquide hydraulique dans un soufflet déformable (14), les déformations dudit soufflet (14) dans une chambre cylindrique (20) remplie de carburant, provoquant un effet de pompage à haute pression dudit carburant ; une came (5) munie de lobes (6) portée par un arbre d'entraînement (1 ), caractérisée par le fait que la partie huile de la pompe comprend : la partie de l'arbre d'entraînement (1 ) portant la came (5) ; la came (5) et ses lobes (6) ; le galet (7) avec son arbre (8) et son roulement (9) portés par une pièce d'appui (12), galet par lequel la came (5) prend appui sur le piston (10) ; ainsi que la partie supérieure dudit piston (10) : de sorte que toute la partie mécanique d'entraînement et de renvoi d'angle baigne dans l'huile de la partie huile.1. Transfer pump for injection of high pressure gasoline of the type comprising a piston (10) discharging hydraulic fluid into a deformable bellows (14), the deformations of said bellows (14) in a cylindrical chamber (20) filled with fuel, causing a high-pressure pumping effect of said fuel; a cam (5) provided with lobes (6) carried by a drive shaft (1), characterized in that the oil portion of the pump comprises: the portion of the drive shaft (1) carrying the cam (5); the cam (5) and its lobes (6); the roller (7) with its shaft (8) and its bearing (9) carried by a support piece (12), roller by which the cam (5) bears on the piston (10); as well as the upper part of said piston (10): so that all the mechanical part of drive and angular gear baths in the oil of the oil part. 2. Pompe transfert selon la revendication 1 , dans laquelle l'étanchéité entre la partie huile et l'arbre d'entraînement (1 ) est assurée par un simple joint à lèvres (30).2. Transfer pump according to claim 1, wherein the seal between the oil portion and the drive shaft (1) is provided by a single lip seal (30). 3. Pompe transfert selon les revendications 1 et 2, dans laquelle la chambre (21 ) du boîtier (3) dans laquelle se débat la came (5) est reliée à un compensateur de volume (26).3. Transfer pump according to claims 1 and 2, wherein the chamber (21) of the housing (3) in which the cam (5) is engaged is connected to a volume compensator (26). 4. Pompe transfert selon la revendication 3, dans laquelle un deuxième compensateur de volume (27) est relié à l'alésage (22) dans lequel se débattent le galet (7), la pièce d'appui (12) et la partie supérieure du piston (10).4. Transfer pump according to claim 3, wherein a second volume compensator (27) is connected to the bore (22) in which the roller (7), the bearing piece (12) and the upper part piston (10). 5. Pompe selon la revendication 4, dans laquelle le piston (10) comporte un alésage interne (10a) communiquant avec le susdit alésage (22) par un orifice (24) et comportant un clapet anti-retour (28) ; de sorte que le volume d'huile mis en pression est de faible importance.5. Pump according to claim 4, wherein the piston (10) has an internal bore (10a) communicating with the aforesaid bore (22) through an orifice (24) and having a non-return valve (28); so that the volume of oil put under pressure is of small importance. 6. Pompe selon la revendication 5, dans laquelle le piston (10) coulisse dans un fourreau (13) muni à sa base d'un disque (17) portant un alésage (19) dans lequel coulisse un doigt (18) porté par une pièce (15) fixée à la base du soufflet (14) ; de façon à assurer le guidage dudit soufflet (14) lors de ses déformations successives. 6. Pump according to claim 5, wherein the piston (10) slides in a sleeve (13) provided at its base with a disc (17) carrying a bore (19) in which slides a finger (18) carried by a piece (15) attached to the base of the bellows (14); so as to ensure the guiding said bellows (14) during its successive deformations. 7. Pompe selon la revendication 1 , dans laquelle le mécanisme d'entraînement de l'arbre (1) est un mécanisme à roue libre. 7. Pump according to claim 1, wherein the drive mechanism of the shaft (1) is a freewheel mechanism.
FR0607181A 2006-08-04 2006-08-04 TRANSFER PUMP FOR HIGH PRESSURE FUEL INJECTION Expired - Fee Related FR2904665B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR0607181A FR2904665B1 (en) 2006-08-04 2006-08-04 TRANSFER PUMP FOR HIGH PRESSURE FUEL INJECTION
AT07290936T ATE449905T1 (en) 2006-08-04 2007-07-25 FEED PUMP FOR INJECTING PETROL UNDER HIGH PRESSURE
EP07290936A EP1884656B1 (en) 2006-08-04 2007-07-25 Transfer pump for high-pressure petrol injection
DE602007003414T DE602007003414D1 (en) 2006-08-04 2007-07-25 Feed pump for injection of gas under high pressure
US11/878,975 US20080175731A1 (en) 2006-08-04 2007-07-30 Transfer pump for injection of fuel at high pressure
JP2007201770A JP2008038909A (en) 2006-08-04 2007-08-02 Transfer pump for high-pressure petrol injection
KR1020070078198A KR20080012799A (en) 2006-08-04 2007-08-03 Transfer pump for the injection of fuel at high pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0607181A FR2904665B1 (en) 2006-08-04 2006-08-04 TRANSFER PUMP FOR HIGH PRESSURE FUEL INJECTION

Publications (2)

Publication Number Publication Date
FR2904665A1 true FR2904665A1 (en) 2008-02-08
FR2904665B1 FR2904665B1 (en) 2008-10-31

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FR0607181A Expired - Fee Related FR2904665B1 (en) 2006-08-04 2006-08-04 TRANSFER PUMP FOR HIGH PRESSURE FUEL INJECTION

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US (1) US20080175731A1 (en)
EP (1) EP1884656B1 (en)
JP (1) JP2008038909A (en)
KR (1) KR20080012799A (en)
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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009270693A (en) * 2008-05-12 2009-11-19 Ntn Corp Pump tappet
KR20110013367A (en) * 2008-05-12 2011-02-09 에누티에누 가부시키가이샤 Pump tappet
JP2009293395A (en) * 2008-06-02 2009-12-17 Ntn Corp Pump tappet
JP2009293604A (en) * 2008-06-09 2009-12-17 Ntn Corp Pump tappet
JP2009293393A (en) * 2008-06-02 2009-12-17 Ntn Corp Pump tappet
DE102008059004A1 (en) * 2008-11-25 2010-05-27 Schaeffler Kg roller plunger
DE102010030342A1 (en) * 2010-06-22 2011-12-22 Robert Bosch Gmbh piston pump
GB201520677D0 (en) * 2015-11-24 2016-01-06 Delphi Internat Operations Luxembourg S À R L High pressure fuel pump
GB2559612B (en) * 2017-02-13 2020-04-01 Delphi Tech Ip Ltd Damper device with a capsule held in a rubber holder maintained in position by a metallic plug
FR3105207B1 (en) 2019-12-23 2022-04-29 Syctom Lagence Metropolitaine Des Dechets Menagers Device for high pressure injection of a wet mixture
FR3105252B1 (en) 2019-12-23 2023-01-20 Syctom Lagence Metropolitaine Des Dechets Menagers Device for injecting an organic resource under high pressure
FR3112089B1 (en) 2020-07-02 2024-01-19 Commissariat Energie Atomique DEVICE FOR INJECTING AN EFFLUENT UNDER HIGH PRESSURE

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19955298A1 (en) * 1998-11-19 2000-05-25 Luk Fahrzeug Hydraulik Supply device for fuel, with pump element formed from hose
FR2826068A1 (en) * 2001-06-19 2002-12-20 Siemens Automotive Hydraulics Flow regulation device for fuel transfer pump comprises chambers, receiving high pressure oil, though non-return valve to common manifold connected to electrical valve regulating flow
FR2828240A1 (en) * 2001-08-03 2003-02-07 Siemens Automotive Hydraulics Fuel transfer pump e.g. for motor vehicle engine has pistons in cylinders linked to accumulators and non-return valves with distributor
WO2004072477A1 (en) * 2003-02-11 2004-08-26 Ganser-Hydromag Ag High pressure pump

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2343962A (en) * 1941-02-25 1944-03-14 Dodson Edward Measuring pump
US2395330A (en) * 1942-09-11 1946-02-19 Dayton Liquid Meter Co Oil circulatory system employed in fuel injection pumps
US2410947A (en) * 1943-04-19 1946-11-12 Caterpillar Tractor Co Fuel injection pum mechanism
US2440194A (en) * 1946-01-29 1948-04-20 Texas Co Fuel pump
US2897808A (en) * 1956-07-31 1959-08-04 Bendix Aviat Corp Fuel injection system
US4008009A (en) * 1975-09-30 1977-02-15 Endre Kovacs Fuel injection pump
DE2853130A1 (en) * 1978-12-08 1980-06-19 Luk Lamellen & Kupplungsbau DEVICE FOR STARTING AN INTERNAL COMBUSTION ENGINE
JPH0587009A (en) * 1991-09-30 1993-04-06 Yamaha Motor Co Ltd Diesel engine
JPH07269444A (en) * 1994-03-29 1995-10-17 Yamaha Motor Co Ltd High pressure fuel pump
JPH1122648A (en) * 1997-07-04 1999-01-26 Nissan Motor Co Ltd Fuel pump
JPH11159446A (en) * 1997-11-28 1999-06-15 Nissan Motor Co Ltd Hydraulic interposing pump
JPH11324861A (en) * 1998-05-19 1999-11-26 Mitsubishi Electric Corp Fuel injection pump
JP3758480B2 (en) * 2000-08-25 2006-03-22 国産電機株式会社 Diaphragm pump
JP4090382B2 (en) * 2003-04-21 2008-05-28 株式会社日立製作所 Fuel supply apparatus for in-cylinder injection internal combustion engine
JP2006118448A (en) * 2004-10-22 2006-05-11 Denso Corp Fuel injection pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19955298A1 (en) * 1998-11-19 2000-05-25 Luk Fahrzeug Hydraulik Supply device for fuel, with pump element formed from hose
FR2826068A1 (en) * 2001-06-19 2002-12-20 Siemens Automotive Hydraulics Flow regulation device for fuel transfer pump comprises chambers, receiving high pressure oil, though non-return valve to common manifold connected to electrical valve regulating flow
FR2828240A1 (en) * 2001-08-03 2003-02-07 Siemens Automotive Hydraulics Fuel transfer pump e.g. for motor vehicle engine has pistons in cylinders linked to accumulators and non-return valves with distributor
WO2004072477A1 (en) * 2003-02-11 2004-08-26 Ganser-Hydromag Ag High pressure pump

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EP1884656B1 (en) 2009-11-25
US20080175731A1 (en) 2008-07-24
DE602007003414D1 (en) 2010-01-07
ATE449905T1 (en) 2009-12-15
FR2904665B1 (en) 2008-10-31
EP1884656A1 (en) 2008-02-06
KR20080012799A (en) 2008-02-12
JP2008038909A (en) 2008-02-21

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