EP1460260A2 - Electric diaphragm type fuel pump for a motor vehicle - Google Patents

Electric diaphragm type fuel pump for a motor vehicle Download PDF

Info

Publication number
EP1460260A2
EP1460260A2 EP04290703A EP04290703A EP1460260A2 EP 1460260 A2 EP1460260 A2 EP 1460260A2 EP 04290703 A EP04290703 A EP 04290703A EP 04290703 A EP04290703 A EP 04290703A EP 1460260 A2 EP1460260 A2 EP 1460260A2
Authority
EP
European Patent Office
Prior art keywords
piston
cam
fuel pump
pump according
guide body
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.)
Withdrawn
Application number
EP04290703A
Other languages
German (de)
French (fr)
Other versions
EP1460260A3 (en
Inventor
James Hermary
Vincent Huet
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.)
Sofabex
Original Assignee
Sofabex
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 Sofabex filed Critical Sofabex
Publication of EP1460260A2 publication Critical patent/EP1460260A2/en
Publication of EP1460260A3 publication Critical patent/EP1460260A3/en
Withdrawn legal-status Critical Current

Links

Images

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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven

Definitions

  • the invention relates to an electric fuel pump of the diaphragm type for a motor vehicle.
  • This pump is especially intended for supplying fuel to two-wheeled vehicles, without however being limited to this use.
  • Document FR-2 814 779 by the applicant describes an electric fuel pump with a membrane which makes it possible to partially solve these problems.
  • the diaphragm of the pump is directly connected to a piston whose reciprocating axial movement makes it possible to create a depression or an overpressure in a working chamber located on the other side of the membrane.
  • the piston is driven axially from the rotation of the engine by a drive mechanism, the axis of the piston being parallel with the shaft of the engine.
  • This design makes it possible to house the pump in a reduced tubular casing and to isolate the hydraulic part of the drive mechanism and the motor, so that the efficiency is improved.
  • this pump has several drawbacks. Due to the parallelism of the piston and the drive shaft, the axes of the drive mechanism are perpendicular to the latter and undergo axial forces which accelerate the wear of the moving parts. In addition, the highly stressed membrane has a limited service life.
  • the invention aims to overcome these drawbacks by proposing a more wear-resistant fuel pump, of simple design, which has a high efficiency for a small footprint.
  • the pump also comprises at least one membrane, the peripheral edge of which is clamped between the guide body and the hydraulic block, the central portion of said at least one membrane being fixed on the piston, and the piston drive mechanism comprises a cam with cylindrical eccentric driven in rotation from the shaft of the electric motor by means of a gear, the axes of the gear and of the cam being parallel to the motor shaft and perpendicular to the direction of movement of the piston.
  • the axes of the gear undergo only radial stresses, which makes it possible to increase their service life. Placing one or more membranes also improves the service life of the pump.
  • the gear comprises at least one planetary gear train comprising a fixed ring and a rotating planet carrier intended to drive the cam in rotation.
  • the ratio obtained is then particularly suitable for the engine of a two-wheeled vehicle.
  • the gear comprises at least one planetary gear comprising a fixed planet carrier and a rotating ring intended to drive the cam in rotation.
  • the reduction ratio obtained can be used for pumps intended for the engine of a four-wheeled vehicle, for example as a booster pump for a diesel engine.
  • either of these embodiments can be chosen independently of the application. The difference between these modes is related to the speed of rotation of the electric motor and the reduction ratio to be applied to reduce the beat frequency of the membrane to a value compatible with the application.
  • one or the other embodiment will be chosen according to the electric motor used and the desired beat frequency.
  • the latter affects the pump flow rate, as well as the discharge pressure pulses, the lifetime of the membrane (s), the sensitivity to cavitation, the suction capacity, etc. .
  • two to four membranes are superimposed and fixed between the hydraulic block and the guide body.
  • the diaphragm (s) serve both for pumping and for sealing the engine block and the drive mechanism so that the fuel does not pass through the latter, thereby improving efficiency.
  • the cylindrical eccentric cam of the pump has a double contact with the piston, so that when it makes a turn it drives the piston so that it performs a back and forth in the body of guide.
  • the movement of the piston is thus perfectly regular and controlled.
  • a needle bearing is arranged between the eccentric cam and the piston so as to reduce the friction between the cam and the piston and to reduce the wear of the parts.
  • the pump comprises in the suction passage a pressure limiting valve to limit the discharge pressure, which makes it possible to limit the forces provided by the piston drive mechanism during the discharge.
  • the pump can also include a spring which is put in compression by the piston during the suction, and which during the discharge expands, participating with the cam in the displacement of the piston.
  • the cam, the drive mechanism and the motor are thus less stressed during the delivery, while the greatest effort is to be provided, which makes it possible to increase their service life.
  • the electric motor block, the gear of the drive mechanism and a part of the guide body are contained in a sealed tubular envelope and the other part of the guide block comprising the piston and the cam is contained in a housing watertight formed of two shells, one of the shells containing the hydraulic block.
  • the pump obtained thus has a small footprint.
  • the electric fuel pump 10 comprises an electric motor block 12, which is supplied with current from the supply of the vehicle via conductors 14. From side of the conductors 14, a cover 16, insulates the end of the motor. Conductors integrated into the cover 16 (not shown) come into contact with the conductors 14 of the engine block and provide the electrical connection between the electrical power source and the engine. This arrangement makes it possible to obtain a good seal with respect to the envelope of the engine block.
  • the engine block 12 and the cover 16 are inserted in a tubular casing 18.
  • a guide body 20 is partially inserted in the tubular casing 18.
  • the inserted part 20a of the guide body is cylindrical. It comes to fit in the envelope 18, pressing against a motor support 19 substantially in the form of a disc fixed at the end of the motor 12.
  • the other part 20b of the guide body protrudes from the envelope 18.
  • the part 20b has a parallelepiped shape having an elongated cavity 20c of rectangular section whose axis 21 is perpendicular to the axis of the cylindrical part 20a. Inside the cavity 20c, a piston 22 of complementary shape is slidably mounted in the direction of the axis 21.
  • the projecting part 20b is contained in a housing formed by two shells 24 and 26 closing the two ends of the cavity 20c, along the axis 21.
  • One of the shells 26 of the housing contains the hydraulic block of the pump.
  • the two shells can for example be snapped onto lugs of the part 20b of the guide body, or be fixed by other means thereon.
  • the shaft 30 of the motor 12 rotates a pinion 32, which in turn rotates the satellites 34 of a planetary gear train or planetary gear.
  • the satellites 34 are mounted rotating in a planet carrier 36.
  • the satellites 34 rotate inside a fixed crown with internal toothing 38.
  • This crown 38 is integral with the internal face of the cylindrical part 20a of the tubular body, so that the crown 38, the satellites 34 and the planet carrier 36 are contained in this cylindrical part 20a.
  • the planet carrier 36 is integral in rotation with an axis 40 coaxial with the shaft 30 of the engine.
  • This axis 40 rotates a cam with a cylindrical eccentric 42.
  • the axis 40 journals in two orifices of the parallelepiped part 20b of the guide body located on either side of the cavity 20c, for example by means of bearings or bearings 44 supported by elements 70.
  • the cam 42 is received in an oblong recess 46 formed through the piston 22.
  • a needle bearing 48 such as a needle sleeve, is placed in the recess between the cam and the piston, so that the surface of the cam is in contact with the needles of the socket 48 and that the latter always has two diametrically opposite contacts on the wall of the recess 46.
  • the face of the piston 22 directed towards the hydraulic block is fixed to the central part of a membrane 50, the peripheral edge of which is tightly clamped between the part 20b of the guide body and the shell 26 of the housing.
  • a membrane 50 In order to increase the service life of the pump, several membranes can be superimposed. Preferably, two to four membranes will be used.
  • the hydraulic block has a suction passage 52 connected to the vehicle fuel tank, and a discharge passage 54 connected to the vehicle injection device. Said passages communicate via two non-return valves 56, 58 mounted in opposition, with a working chamber 60 formed on the inner face of the hydraulic block, facing the central part of the membrane 50.
  • the valves 56, 58 are applied against their respective seats by return springs. However, these may be valves without return spring or "duckbill" valves.
  • Another pressure limiting valve 62 is placed in the suction passage 52 and applied against its seat by a spring 64. This valve makes it possible to limit the amount of fuel introduced into the working chamber 60 and thus to limit the pressure during of repression.
  • the calibration of the valve 62 depends on its application. It can be set to limit the discharge pressure to around 10-11 bar for a two-stroke moped or to around 4 bar for a 4-stroke moped
  • the piston 22 is supported on a helical spring 66 on the side of its end opposite to the membrane 50.
  • the other end of the spring 66 is supported on the bottom of the shell 24 of the housing.
  • the seal between the shell 26 and the part 20b of the guide body 20 is provided by the membrane (s) 50, while the seal between the shell 24 and the portion 20b is provided by an O-ring 68.
  • the seal between the guide body 20 and the envelope 18 is provided by an O-ring 69 placed between the cylindrical part 20a and the internal face of the envelope.
  • An O-ring 72 seals between the cover 16 of the engine and the internal face of the tubular casing 18.
  • a seal 73 seals the valve 62 in the suction passage 52.
  • the pump 10 is thus perfectly sealed and the pump can possibly be completely immersed in the vehicle's fuel tank.
  • suction 52 and discharge 54 passages are oriented in opposite directions from a direction parallel to the motor shaft, thereby reducing the size of the pump.
  • This orientation can however be modified according to the application.
  • Such a pump is particularly well suited to use for a moped engine, without however being limited thereto.
  • a filter element 78 is also provided in the suction passage 52 in order to protect the pump and the injection device placed downstream of the pump from impurities present in the fuel and liable to cause a malfunction.
  • the gear consists of a planetary gear train which comprises a rotating internal gear ring 74, and integral in rotation with the axis 40 of rotation of the cam 42.
  • a fixed planet carrier 76 is conjugated to the motor support placed at the end of the motor 12, in the envelope 18.
  • the pinion 32 connected to the motor shaft drives the satellites 80 in rotation, the axes of which are supported by the planet carrier 76.
  • the toothed ring 74, the planet carrier 76 , and the satellites 80 are placed in the part 20a of the guide body.
  • the pressure limiting valve 62 has been eliminated in favor of an external regulator, not shown. It can however be added depending on the use of the pump. Although the suction 52 and discharge 54 passages are oriented in opposite directions from a direction perpendicular to the motor shaft, the size of the pump remains small. A configuration identical to the first embodiment can also be carried out.
  • the reduction ratio of the planetary gear can be varied in order to obtain the desired flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The pump has a membrane (50) with its peripheral end attached between a guiding body (20) and a hydraulic block. A piston (22) driving mechanism comprises a cam (42) having an eccentric cylinder that is driven, through intermediate gears, by an engine shaft. Axes of gears and the cam are parallel to the shaft and perpendicular to the direction of movement of the piston.

Description

L'invention concerne une pompe à carburant électrique du type à membrane pour véhicule automobile. Cette pompe est notamment destinée à l'alimentation en carburant des véhicules deux roues, sans toutefois se limiter à cette utilisation.The invention relates to an electric fuel pump of the diaphragm type for a motor vehicle. This pump is especially intended for supplying fuel to two-wheeled vehicles, without however being limited to this use.

Afin de réduire la consommation et les émissions polluantes des moteurs des véhicules à deux roues, on utilise un système d'injection directe de carburant dans le cylindre lorsque les lumières à l'échappement sont fermées. Ce type d'injection nécessite une pompe à carburant à débit adapté au moteur qui fonctionne à une pression d'environ 8 bars. Les pompes classiques utilisées en automobile, telles que les pompes à gérotor, à turbine ou à canaux latéraux annulaires, ont un rendement insuffisant pour pouvoir être utilisées de manière satisfaisante pour ces véhicules. Notamment, leur conception nécessite un fonctionnement du moteur électrique en immersion dans le carburant, ce qui affecte leur rendement et leurs performances.In order to reduce the consumption and polluting emissions of the engines of two-wheeled vehicles, a system of direct injection of fuel into the cylinder is used when the exhaust lights are closed. This type of injection requires a fuel pump with a flow rate adapted to the engine, which operates at a pressure of approximately 8 bars. Conventional pumps used in automobiles, such as gerotor, turbine or annular side channel pumps, have insufficient efficiency to be able to be used satisfactorily for these vehicles. In particular, their design requires operation of the electric motor in immersion in the fuel, which affects their efficiency and performance.

Le document FR-2 814 779 de la demanderesse décrit une pompe à carburant électrique à membrane qui permet de résoudre en partie ces problèmes. La membrane de la pompe est directement reliée à un piston dont le mouvement axial alternatif permet de créer une dépression ou une surpression dans une chambre de travail située de l'autre côté de la membrane. Le piston est entraîné axialement à partir de la rotation du moteur par un mécanisme d'entraînement, l'axe du piston étant parallèle avec l'arbre du moteur. Cette conception permet de loger la pompe dans une enveloppe tubulaire de taille réduite et d'isoler la partie hydraulique du mécanisme d'entraînement et du moteur, de sorte que le rendement est amélioré. Toutefois, cette pompe présente plusieurs inconvénients. En raison du parallélisme du piston et de l'arbre moteur, les axes du mécanisme d'entraînement sont perpendiculaires à ce dernier et subissent des efforts axiaux qui accélèrent l'usure des pièces en mouvement. De plus, la membrane, fortement sollicitée, a une durée de vie limitée en utilisation.Document FR-2 814 779 by the applicant describes an electric fuel pump with a membrane which makes it possible to partially solve these problems. The diaphragm of the pump is directly connected to a piston whose reciprocating axial movement makes it possible to create a depression or an overpressure in a working chamber located on the other side of the membrane. The piston is driven axially from the rotation of the engine by a drive mechanism, the axis of the piston being parallel with the shaft of the engine. This design makes it possible to house the pump in a reduced tubular casing and to isolate the hydraulic part of the drive mechanism and the motor, so that the efficiency is improved. However, this pump has several drawbacks. Due to the parallelism of the piston and the drive shaft, the axes of the drive mechanism are perpendicular to the latter and undergo axial forces which accelerate the wear of the moving parts. In addition, the highly stressed membrane has a limited service life.

L'invention vise à pallier ces inconvénients en proposant une pompe à carburant plus résistante à l'usure, de conception simple, qui présente un rendement élevé pour un encombrement faible.The invention aims to overcome these drawbacks by proposing a more wear-resistant fuel pump, of simple design, which has a high efficiency for a small footprint.

A cet effet, l'objet de l'invention concerne une pompe à carburant électrique du type à membrane pour véhicule automobile, comprenant

  • un bloc moteur électrique,
  • un corps de guidage dans lequel est monté un piston,
  • un mécanisme d'entraînement destiné à transformer le mouvement rotatif du moteur en un mouvement axial alternatif du piston,
  • un bloc hydraulique comprenant un passage d'aspiration relié au réservoir et un passage de refoulement relié au dispositif d'injection du moteur du véhicule, lesdits passages communiquant avec une chambre de travail par des clapets anti-retour montés en opposition
To this end, the subject of the invention relates to an electric fuel pump of the membrane type for a motor vehicle, comprising
  • an electric motor block,
  • a guide body in which a piston is mounted,
  • a drive mechanism intended to transform the rotary movement of the engine into an alternating axial movement of the piston,
  • a hydraulic block comprising a suction passage connected to the reservoir and a discharge passage connected to the injection device of the vehicle engine, said passages communicating with a working chamber by non-return valves mounted in opposition

La pompe comprend en outre au moins une membrane dont le bord périphérique est serré entre le corps de guidage et le bloc hydraulique, la portion centrale de ladite au moins une membrane étant fixée sur le piston, et le mécanisme d'entraînement du piston comprend une came à excentrique cylindrique entraînée en rotation à partir de l'arbre du moteur électrique par l'intermédiaire d'un engrenage, les axes de l'engrenage et de la came étant parallèles à l'arbre moteur et perpendiculaires à la direction de déplacement du piston. Ainsi, les axes de l'engrenage subissent uniquement des efforts radiaux, ce qui permet d'augmenter leur durée de vie. La mise en place d'une ou plusieurs membranes permet également d'améliorer la durée d'utilisation de la pompe.The pump also comprises at least one membrane, the peripheral edge of which is clamped between the guide body and the hydraulic block, the central portion of said at least one membrane being fixed on the piston, and the piston drive mechanism comprises a cam with cylindrical eccentric driven in rotation from the shaft of the electric motor by means of a gear, the axes of the gear and of the cam being parallel to the motor shaft and perpendicular to the direction of movement of the piston. Thus, the axes of the gear undergo only radial stresses, which makes it possible to increase their service life. Placing one or more membranes also improves the service life of the pump.

Dans un mode de réalisation avantageux, l'engrenage comprend au moins un train épicycloïdal comprenant une couronne fixe et un porte-satellites tournant destiné à entraîner en rotation la came. Le rapport obtenu est alors particulièrement adapté au moteur d'un véhicule deux roues. Dans un autre mode de réalisation avantageux, l'engrenage comprend au moins un train épicycloïdal comprenant un porte-satellites fixe et une couronne tournante destinée à entraîner en rotation la came. Le rapport de réduction obtenu peut être utilisé pour les pompes destinées au moteur d'un véhicule à quatre roues, par exemple en tant que pompe de gavage d'un moteur diesel. Toutefois, l'un ou l'autre de ces modes de réalisation peut être retenu indépendamment de l'application. La différence entre ces modes est liée à la vitesse de rotation du moteur électrique et au rapport de réduction à appliquer pour ramener la fréquence de battement de la membrane à une valeur compatible avec l'application. Par conséquent, l'un ou l'autre mode de réalisation sera choisi en fonction du moteur électrique utilisé et de la fréquence de battement souhaitée. Cette dernière a une incidence sur le débit de la pompe, ainsi que sur les pulsations de pression au refoulement, la durée de vie de la (des) membrane(s), la sensibilité à la cavitation, la capacité d'aspiration, ...In an advantageous embodiment, the gear comprises at least one planetary gear train comprising a fixed ring and a rotating planet carrier intended to drive the cam in rotation. The ratio obtained is then particularly suitable for the engine of a two-wheeled vehicle. In another advantageous embodiment, the gear comprises at least one planetary gear comprising a fixed planet carrier and a rotating ring intended to drive the cam in rotation. The reduction ratio obtained can be used for pumps intended for the engine of a four-wheeled vehicle, for example as a booster pump for a diesel engine. However, either of these embodiments can be chosen independently of the application. The difference between these modes is related to the speed of rotation of the electric motor and the reduction ratio to be applied to reduce the beat frequency of the membrane to a value compatible with the application. Consequently, one or the other embodiment will be chosen according to the electric motor used and the desired beat frequency. The latter affects the pump flow rate, as well as the discharge pressure pulses, the lifetime of the membrane (s), the sensitivity to cavitation, the suction capacity, etc. .

L'utilisation d'un train à planétaires permet par ailleurs un encombrement limité du mécanisme d'entraînement.The use of a planetary gear also allows limited space for the drive mechanism.

Selon un mode de réalisation, deux à quatre membranes sont superposées et fixées entre le bloc hydraulique et le corps de guidage. La ou les membranes servent à la fois au pompage et à assurer l'étanchéité du bloc moteur et du mécanisme d'entraînement de sorte que le carburant ne traverse pas ce dernier, améliorant ainsi le rendement.According to one embodiment, two to four membranes are superimposed and fixed between the hydraulic block and the guide body. The diaphragm (s) serve both for pumping and for sealing the engine block and the drive mechanism so that the fuel does not pass through the latter, thereby improving efficiency.

Dans un mode de réalisation particulier, la came à excentrique cylindrique de la pompe a un double contact avec le piston, de manière que lorsqu'elle effectue un tour elle entraîne le piston pour qu'il effectue un aller et un retour dans le corps de guidage. Le mouvement du piston est ainsi parfaitement régulier et contrôlé. Avantageusement, un roulement à aiguilles est disposé entre la came à excentrique et le piston de manière à réduire les frottements entre la came et le piston et à réduire l'usure des pièces.In a particular embodiment, the cylindrical eccentric cam of the pump has a double contact with the piston, so that when it makes a turn it drives the piston so that it performs a back and forth in the body of guide. The movement of the piston is thus perfectly regular and controlled. Advantageously, a needle bearing is arranged between the eccentric cam and the piston so as to reduce the friction between the cam and the piston and to reduce the wear of the parts.

Dans une variante, la pompe comprend dans le passage d'aspiration un clapet limiteur de pression pour limiter la -pression de refoulement, ce qui permet de limiter les efforts fournis par le mécanisme d'entraînement du piston lors du refoulement.In a variant, the pump comprises in the suction passage a pressure limiting valve to limit the discharge pressure, which makes it possible to limit the forces provided by the piston drive mechanism during the discharge.

La pompe peut également comporter un ressort qui est mis en compression par le piston lors de l'aspiration, et qui lors du refoulement se détend, participant avec la came au déplacement du piston. La came, le mécanisme d'entraînement et le moteur sont ainsi moins sollicités lors du refoulement, alors que l'effort le plus important est à fournir, ce qui permet d'augmenter leur durée de vie.The pump can also include a spring which is put in compression by the piston during the suction, and which during the discharge expands, participating with the cam in the displacement of the piston. The cam, the drive mechanism and the motor are thus less stressed during the delivery, while the greatest effort is to be provided, which makes it possible to increase their service life.

Dans une variante, le bloc moteur électrique, l'engrenage du mécanisme d'entraînement et une partie du corps de guidage sont contenus dans une enveloppe tubulaire étanche et l'autre partie du bloc de guidage comportant le piston et la came est contenue dans un boîtier étanche formé de deux coquilles, l'une des coquilles contenant le bloc hydraulique. La pompe obtenue présente ainsi un encombrement faible.In a variant, the electric motor block, the gear of the drive mechanism and a part of the guide body are contained in a sealed tubular envelope and the other part of the guide block comprising the piston and the cam is contained in a housing watertight formed of two shells, one of the shells containing the hydraulic block. The pump obtained thus has a small footprint.

D'autres avantages et modes de réalisation de l'invention sont maintenant décrits en référence aux dessins annexés, non limitatifs, dans lesquels :

  • la figure 1 est une vue éclatée d'un mode de réalisation d'une pompe selon l'invention ;
  • la figure 2 est une vue en coupe axiale de la pompe de la figure 1,
  • la figure 3 est une vue en coupe transversale suivant la ligne A-A de la figure 2,
  • la figure 4 est une vue en coupe axiale d'un autre mode de réalisation d'une pompe selon l'invention,
  • la figure 5 est une vue en coupe transversale suivant la ligne B-B de la figure 4.
Other advantages and embodiments of the invention are now described with reference to the accompanying drawings, which are non-limiting, in which:
  • Figure 1 is an exploded view of an embodiment of a pump according to the invention;
  • FIG. 2 is a view in axial section of the pump of FIG. 1,
  • FIG. 3 is a cross-sectional view along line AA of FIG. 2,
  • FIG. 4 is a view in axial section of another embodiment of a pump according to the invention,
  • FIG. 5 is a cross-sectional view along line BB of FIG. 4.

Dans un premier mode de réalisation, en référence aux figures 1 à 3, la pompe à carburant électrique 10 comprend un bloc moteur électrique 12, qui est alimenté en courant à partir de l'alimentation du véhicule par l'intermédiaire de conducteurs 14. Du côté des conducteurs 14, un capot 16, assure l'isolation de l'extrémité du moteur. Des conducteurs intégrés au capot 16 (non représentés) viennent en contact avec les conducteurs 14 du bloc moteur et assurent la liaison électrique entre la source d'alimentation électrique et le moteur. Cette disposition permet d'obtenir une bonne étanchéité par rapport à l'enveloppe du bloc moteur.In a first embodiment, with reference to FIGS. 1 to 3, the electric fuel pump 10 comprises an electric motor block 12, which is supplied with current from the supply of the vehicle via conductors 14. From side of the conductors 14, a cover 16, insulates the end of the motor. Conductors integrated into the cover 16 (not shown) come into contact with the conductors 14 of the engine block and provide the electrical connection between the electrical power source and the engine. This arrangement makes it possible to obtain a good seal with respect to the envelope of the engine block.

Le bloc moteur 12 et le capot 16 sont insérés dans une enveloppe tubulaire 18. A la suite du bloc moteur 12, un corps de guidage 20 est inséré partiellement dans l'enveloppe tubulaire 18. La partie insérée 20a du corps de guidage est cylindrique. Elle vient s'ajuster dans l'enveloppe 18, en appui contre un support moteur 19 sensiblement en forme de disque fixé à l'extrémité du moteur 12. L'autre partie 20b du corps de guidage fait saillie de l'enveloppe 18. La partie 20b présente une forme parallélépipédique comportant une cavité allongée 20c de section rectangulaire dont l'axe 21 est perpendiculaire à l'axe de la partie cylindrique 20a. A l'intérieur de la cavité 20c, un piston 22 de forme complémentaire est monté coulissant suivant la direction de l'axe 21.The engine block 12 and the cover 16 are inserted in a tubular casing 18. Following the engine block 12, a guide body 20 is partially inserted in the tubular casing 18. The inserted part 20a of the guide body is cylindrical. It comes to fit in the envelope 18, pressing against a motor support 19 substantially in the form of a disc fixed at the end of the motor 12. The other part 20b of the guide body protrudes from the envelope 18. The part 20b has a parallelepiped shape having an elongated cavity 20c of rectangular section whose axis 21 is perpendicular to the axis of the cylindrical part 20a. Inside the cavity 20c, a piston 22 of complementary shape is slidably mounted in the direction of the axis 21.

La partie saillante 20b est contenue dans un boîtier formé de deux coquilles 24 et 26 venant fermer les deux extrémités de la cavité 20c, suivant l'axe 21. L'une des coquilles 26 du boîtier contient le bloc hydraulique de la pompe. Les deux coquilles peuvent par exemple être encliquetées sur des ergots de la partie 20b du corps de guidage, ou être fixées par d'autres moyens sur celle-ci.The projecting part 20b is contained in a housing formed by two shells 24 and 26 closing the two ends of the cavity 20c, along the axis 21. One of the shells 26 of the housing contains the hydraulic block of the pump. The two shells can for example be snapped onto lugs of the part 20b of the guide body, or be fixed by other means thereon.

L'arbre 30 du moteur 12 entraîne en rotation un pignon 32, lequel entraîne à son tour en rotation les satellites 34 d'un train épicycloïdal ou train à planétaires. Les satellites 34 sont au nombre de trois. Ils sont montés tournant dans un porte-satellites 36. Les satellites 34 tournent à l'intérieur d'une couronne fixe à denture interne 38. Cette couronne 38 est solidaire de la face interne de la partie cylindrique 20a du corps tubulaire, de sorte que la couronne 38, les satellites 34 et le porte-satellites 36 sont contenus dans cette partie cylindrique 20a.The shaft 30 of the motor 12 rotates a pinion 32, which in turn rotates the satellites 34 of a planetary gear train or planetary gear. There are three satellites 34. They are mounted rotating in a planet carrier 36. The satellites 34 rotate inside a fixed crown with internal toothing 38. This crown 38 is integral with the internal face of the cylindrical part 20a of the tubular body, so that the crown 38, the satellites 34 and the planet carrier 36 are contained in this cylindrical part 20a.

Le porte-satellites 36 est solidaire en rotation avec un axe 40 coaxial avec l'arbre 30 du moteur. Cet axe 40 entraîne en rotation une came à excentrique cylindrique 42. L'axe 40 tourillonne dans deux orifices de la partie parallélépipédique 20b du corps de guidage situés de part et d'autre de la cavité 20c, par exemple au moyen de roulements ou de paliers 44 supportés par des éléments 70.The planet carrier 36 is integral in rotation with an axis 40 coaxial with the shaft 30 of the engine. This axis 40 rotates a cam with a cylindrical eccentric 42. The axis 40 journals in two orifices of the parallelepiped part 20b of the guide body located on either side of the cavity 20c, for example by means of bearings or bearings 44 supported by elements 70.

Comme le montre clairement la figure 3, la came 42 est reçue dans un évidement 46 de forme oblongue formé à travers le piston 22. Un roulement à aiguilles 48, tel qu'une douille à aiguilles, est placé dans l'évidement entre la came et le piston, de sorte la surface de la came soit en contact avec les aiguilles de la douille 48 et que cette dernière présente toujours deux contacts diamétralement opposés sur la paroi de l'évidement 46.As clearly shown in Figure 3, the cam 42 is received in an oblong recess 46 formed through the piston 22. A needle bearing 48, such as a needle sleeve, is placed in the recess between the cam and the piston, so that the surface of the cam is in contact with the needles of the socket 48 and that the latter always has two diametrically opposite contacts on the wall of the recess 46.

La face du piston 22 dirigée vers le bloc hydraulique est fixée à la partie centrale d'une membrane 50 dont le bord périphérique est fortement serré entre la partie 20b du corps de guidage et la coquille 26 du boîtier. Afin d'augmenter la durée de vie de la pompe, plusieurs membranes peuvent être superposées. De préférence, deux à quatre membranes seront utilisées.The face of the piston 22 directed towards the hydraulic block is fixed to the central part of a membrane 50, the peripheral edge of which is tightly clamped between the part 20b of the guide body and the shell 26 of the housing. In order to increase the service life of the pump, several membranes can be superimposed. Preferably, two to four membranes will be used.

Le bloc hydraulique présente un passage d'aspiration 52 relié au réservoir de carburant du véhicule, et un passage de refoulement 54 relié au dispositif d'injection du véhicule. Lesdits passages communiquent par l'intermédiaire de deux clapets anti-retour 56, 58 montés en opposition, avec une chambre de travail 60 formée sur la face intérieure du bloc hydraulique, en regard de la partie centrale de la membrane 50. Les clapets 56, 58, sont appliqués contre leur siège respectif par des ressorts de rappel. Il peut toutefois s'agir de clapets sans ressort de rappel ou de clapets "bec de canard". Un autre clapet 62 de limitation de pression est placé dans le passage d'aspiration 52 et appliqué contre son siège par un ressort 64. Ce clapet permet de limiter la quantité de carburant introduite dans la chambre de travail 60 et de limiter ainsi la pression lors du refoulement. Le tarage du clapet 62 est fonction de son application. Il peut être réglé pour limiter la pression de refoulement à 10-11 bars environ pour un cyclomoteur deux temps ou à 4 bars environ pour un cyclomoteur 4 tempsThe hydraulic block has a suction passage 52 connected to the vehicle fuel tank, and a discharge passage 54 connected to the vehicle injection device. Said passages communicate via two non-return valves 56, 58 mounted in opposition, with a working chamber 60 formed on the inner face of the hydraulic block, facing the central part of the membrane 50. The valves 56, 58 are applied against their respective seats by return springs. However, these may be valves without return spring or "duckbill" valves. Another pressure limiting valve 62 is placed in the suction passage 52 and applied against its seat by a spring 64. This valve makes it possible to limit the amount of fuel introduced into the working chamber 60 and thus to limit the pressure during of repression. The calibration of the valve 62 depends on its application. It can be set to limit the discharge pressure to around 10-11 bar for a two-stroke moped or to around 4 bar for a 4-stroke moped

Le piston 22 est en appui sur un ressort hélicoïdal 66 du côté de son extrémité opposée à la membrane 50. L'autre extrémité du ressort 66 est en appui sur le fond de la coquille 24 du boîtier.The piston 22 is supported on a helical spring 66 on the side of its end opposite to the membrane 50. The other end of the spring 66 is supported on the bottom of the shell 24 of the housing.

L'étanchéité entre la coquille 26 et la partie 20b du corps de guidage 20 est assurée par la ou les membranes 50, tandis que l'étanchéité entre la coquille 24 et la partie 20b est assurée par un joint torique 68. L'étanchéité entre le corps de guidage 20 et l'enveloppe 18 est assurée par un joint torique 69 placé entre la partie cylindrique 20a et la face interne de l'enveloppe. Un joint torique 72 assure l'étanchéité entre le capot 16 du moteur et la face interne de l'enveloppe tubulaire 18. Un joint 73 assure l'étanchéité du clapet 62 dans le passage d'aspiration 52. La pompe 10 est ainsi parfaitement étanche et la pompe peut éventuellement être totalement plongée dans le réservoir de carburant du véhicule.The seal between the shell 26 and the part 20b of the guide body 20 is provided by the membrane (s) 50, while the seal between the shell 24 and the portion 20b is provided by an O-ring 68. The seal between the guide body 20 and the envelope 18 is provided by an O-ring 69 placed between the cylindrical part 20a and the internal face of the envelope. An O-ring 72 seals between the cover 16 of the engine and the internal face of the tubular casing 18. A seal 73 seals the valve 62 in the suction passage 52. The pump 10 is thus perfectly sealed and the pump can possibly be completely immersed in the vehicle's fuel tank.

Dans ce mode de réalisation, les passages d'aspiration 52 et de refoulement 54 sont orientés dans des sens opposés d'une direction parallèle à l'arbre moteur, réduisant ainsi l'encombrement de la pompe. Cette orientation peut toutefois être modifiée en fonction de l'application. Une telle pompe est particulièrement bien adaptée à une utilisation pour un moteur de cyclomoteur, sans toutefois y être limitée.In this embodiment, the suction 52 and discharge 54 passages are oriented in opposite directions from a direction parallel to the motor shaft, thereby reducing the size of the pump. This orientation can however be modified according to the application. Such a pump is particularly well suited to use for a moped engine, without however being limited thereto.

Un élément filtrant 78 est également prévu dans le passage d'aspiration 52 afin de protéger la pompe et le dispositif d'injection placé en aval de la pompe des impuretés présentes dans le carburant et susceptibles de provoquer un dysfonctionnement.A filter element 78 is also provided in the suction passage 52 in order to protect the pump and the injection device placed downstream of the pump from impurities present in the fuel and liable to cause a malfunction.

Un autre mode de réalisation est décrit en référence aux figures 4 et 5. Il est particulièrement adapté à une utilisation avec un moteur de véhicule à quatre roues, mais peut être utilisé pour d'autres applications. La structure générale de la pompe représentée est identique à celle qui vient d'être décrite et diffère essentiellement par la structure de l'engrenage du mécanisme d'entraînement. Les éléments identiques ont été représentés par les mêmes références.Another embodiment is described with reference to Figures 4 and 5. It is particularly suitable for use with a four-wheeled vehicle engine, but can be used for other applications. The general structure of the pump shown is identical to that which has just been described and differs essentially in the structure of the gear of the drive mechanism. Identical elements have been represented by the same references.

L'engrenage est constitué d'un train épicycloïdal qui comprend une couronne à denture interne 74 tournante, et solidaire en rotation de l'axe 40 de rotation de la came 42. Un porte-satellites 76 fixe est conjugué au support moteur placé à l'extrémité du moteur 12, dans l'enveloppe 18. Le pignon 32 relié à l'arbre du moteur entraîne en rotation les satellites 80 dont les axes sont supportés par le porte-satellites 76. La couronne dentée 74, le porte-satellites 76, et les satellites 80 sont placés dans la partie 20a du corps de guidage.The gear consists of a planetary gear train which comprises a rotating internal gear ring 74, and integral in rotation with the axis 40 of rotation of the cam 42. A fixed planet carrier 76 is conjugated to the motor support placed at the end of the motor 12, in the envelope 18. The pinion 32 connected to the motor shaft drives the satellites 80 in rotation, the axes of which are supported by the planet carrier 76. The toothed ring 74, the planet carrier 76 , and the satellites 80 are placed in the part 20a of the guide body.

Le clapet limiteur de pression 62 a été supprimé au profit d'un régulateur externe non représenté. Il peut toutefois être rajouté en fonction de l'utilisation de la pompe. Bien que les passages d'aspiration 52 et de refoulement 54 soient orientés dans des sens opposés d'une direction perpendiculaire à l'arbre moteur, l'encombrement de la pompe reste faible. Une configuration identique au premier mode de réalisation peut aussi être réalisée.The pressure limiting valve 62 has been eliminated in favor of an external regulator, not shown. It can however be added depending on the use of the pump. Although the suction 52 and discharge 54 passages are oriented in opposite directions from a direction perpendicular to the motor shaft, the size of the pump remains small. A configuration identical to the first embodiment can also be carried out.

Un cycle de fonctionnement de la pompe 10 est maintenant décrit. Lorsque le moteur 12 est alimenté en courant, son arbre 30 entraîne en rotation le pignon 32. Dans le mode de réalisation représenté figures 1 à 3, ce pignon 32 fait tourner les satellites 34 dans la couronne dentée 38 fixe, de sorte que les satellites entraînent à leur tour en rotation le porte-satellites 36, et par conséquent la came 42. Dans le mode de réalisation représenté figures 4 et 5, le pignon 32 fait tourner les satellites 80 dans la couronne dentée 74. Le porte-satellites 76 étant fixe, la couronne 74 est entraînée à son tour en rotation, ainsi que la came 42. Le fonctionnement est ensuite identique à celui décrit dans le document FR-2 814 779, à savoir, une rotation d'un tour de la came 32 dans l'évidement oblong 46 provoque un mouvement aller du piston dans une direction opposée à la membrane et un mouvement retour du piston vers la membrane. Le piston étant lié à la membrane, ces mouvements conduisent respectivement à une dépression dans la chambre de travail 60 entraînant l'aspiration d'une dose de carburant dans cette dernière, et à une surpression dans la chambre de travail 60 entraînant le refoulement du carburant hors de celle-ci.An operating cycle of the pump 10 is now described. When the motor 12 is supplied with current, its shaft 30 rotates the pinion 32. In the embodiment shown in FIGS. 1 to 3, this pinion 32 rotates the satellites 34 in the fixed ring gear 38, so that the satellites in turn drive the planet carrier 36, and therefore the cam 42. In the embodiment shown in Figures 4 and 5, the pinion 32 rotates the satellites 80 in the ring gear 74. The planet carrier 76 being fixed, the crown 74 is rotated in turn, as is the cam 42. The operation is then identical to that described in document FR-2 814 779, namely, a rotation of one revolution of the cam 32 in the oblong recess 46 causes a forward movement of the piston in a direction opposite to the membrane and a return movement of the piston towards the membrane. The piston being linked to the membrane, these movements respectively lead to a vacuum in the working chamber 60 causing the suction of a dose of fuel therein, and overpressure in the working chamber 60 causing the fuel to be discharged from the latter.

En fonction de l'utilisation et du type de moteur utilisé, on pourra faire varier le rapport de réduction du train épicycloïdal afin d'obtenir le débit souhaité. A cet effet, on peut également modifier le volume de la chambre de travail 60 et/ou la section du piston, ainsi que le réglage des clapets anti-retour, et/ou du clapet limiteur de pression.Depending on the use and the type of motor used, the reduction ratio of the planetary gear can be varied in order to obtain the desired flow. For this purpose, it is also possible to modify the volume of the working chamber 60 and / or the section of the piston, as well as the adjustment of the non-return valves, and / or of the pressure limiting valve.

Claims (9)

Pompe à carburant électrique (10) du type à membrane pour véhicule automobile, comprenant - un bloc moteur électrique (12), - un corps de guidage (20) dans lequel est monté un piston (22), - un mécanisme d'entraînement destiné à transformer le mouvement rotatif du moteur en un mouvement axial alternatif du piston, - un bloc hydraulique comprenant un passage d'aspiration (52) relié au réservoir et un passage de refoulement (54) relié au dispositif à injection du moteur du véhicule, lesdits passages (52, 54) communiquant avec une chambre de travail (60) par des clapets anti-retour (56, 58) montés en opposition,    la pompe comprenant au moins une membrane (50) dont le bord périphérique est serré entre le corps de guidage (20) et le bloc hydraulique, la portion centrale de ladite au moins une membrane (50) étant fixée sur le piston (22), et le mécanisme d'entraînement du piston (22) comprenant une came (42) à excentrique cylindrique entraînée en rotation à partir de l'arbre (30) du moteur électrique par l'intermédiaire d'un engrenage comprenant au moins un train épicycloïdal (32, 34, 36, 38 ; 32, 74, 76, 80), les axes de l'engrenage et de la came étant parallèles à l'arbre (30) moteur et perpendiculaires à la direction de déplacement du piston (22).Diaphragm type electric fuel pump (10) for a motor vehicle, comprising - an electric motor unit (12), - a guide body (20) in which a piston (22) is mounted, - a drive mechanism intended to transform the rotary movement of the motor into an alternating axial movement of the piston, - a hydraulic block comprising a suction passage (52) connected to the reservoir and a discharge passage (54) connected to the injection device of the vehicle engine, said passages (52, 54) communicating with a working chamber (60) by non-return valves (56, 58) mounted in opposition, the pump comprising at least one membrane (50) whose peripheral edge is clamped between the guide body (20) and the hydraulic block, the central portion of said at least one membrane (50) being fixed on the piston (22), and the piston drive mechanism (22) comprising a cam (42) with a cylindrical eccentric driven in rotation from the shaft (30) of the electric motor by means of a gear comprising at least one planetary gear ( 32, 34, 36, 38; 32, 74, 76, 80), the axes of the gear and of the cam being parallel to the motor shaft (30) and perpendicular to the direction of movement of the piston (22). Pompe selon la revendication 1, caractérisée en ce que ledit au moins un train épicycloïdal comprend une couronne fixe (38) et un porte-satellites tournant (36) destiné à entraîner en rotation la came (42).Pump according to claim 1, characterized in that said at least one planetary gear train comprises a fixed ring (38) and a rotating planet carrier (36) intended to drive the cam (42) in rotation. Pompe à carburant selon la revendication 1, caractérisée en ce que ledit au moins un train épicycloïdal comprend un porte-satellites fixe (76) et une couronne tournante (74) destinée à entraîner en rotation la came (42).Fuel pump according to claim 1, characterized in that said at least one planetary gear comprises a fixed planet carrier (76) and a rotating ring (74) intended to drive the cam (42) in rotation. Pompe à carburant selon l'une des revendications 1 à 3, caractérisée en ce que deux à quatre membranes (50) superposées sont fixées entre le bloc hydraulique et le corps de guidage.Fuel pump according to one of claims 1 to 3, characterized in that two to four superimposed membranes (50) are fixed between the hydraulic block and the guide body. Pompe à carburant selon l'une des revendications 1 à 4, caractérisée en ce que la came (42) à excentrique cylindrique a un double contact avec le piston (22), de manière que lorsqu'elle effectue un tour elle entraîne le piston (22) pour qu'il effectue un aller et un retour dans le corps de guidage (20).Fuel pump according to one of claims 1 to 4, characterized in that the cam (42) with cylindrical eccentric has a double contact with the piston (22), so that when it performs one turn it drives the piston (22) so that it goes back and forth in the guide body (20). Pompe à carburant selon la revendication 5, caractérisée en ce qu'un roulement à aiguilles (48) est disposé entre la came (42) et le piston (22).Fuel pump according to claim 5, characterized in that a needle bearing (48) is arranged between the cam (42) and the piston (22). Pompe à carburant selon l'une des revendications 1 à 6, caractérisée en ce qu'elle comprend dans le passage d'aspiration (52) un clapet limiteur de pression (62) permettant de limiter la pression de refoulement.Fuel pump according to one of claims 1 to 6, characterized in that it comprises in the suction passage (52) a pressure relief valve (62) making it possible to limit the discharge pressure. Pompe à carburant selon l'une des revendications 1 à 7, caractérisée en ce qu'elle comporte un ressort (66) qui est mis en compression par le piston (22) lors de l'aspiration et qui lors du refoulement se détend participant avec la came (42) au déplacement du piston (22).Fuel pump according to one of claims 1 to 7, characterized in that it comprises a spring (66) which is put in compression by the piston (22) during the suction and which during the discharge expands participating with the cam (42) when the piston (22) moves. Pompe à carburant selon l'une des revendications précédentes, caractérisée en ce que le bloc moteur électrique (12), l'engrenage (32, 34, 36, 38; 32, 74, 76, 80) du mécanisme d'entraînement et une partie (20a) du corps de guidage (20) sont contenus dans une enveloppe tubulaire (18) étanche et en que l'autre partie (20b) du bloc de guidage (20) comportant le piston (22) et la came (42) est contenue dans un boîtier étanche formé de deux coquilles (24, 26), l'une (26) des coquilles contenant le bloc hydraulique.Fuel pump according to one of the preceding claims, characterized in that the electric motor unit (12), the gear (32, 34, 36, 38; 32, 74, 76, 80) of the drive mechanism and a part (20a) of the guide body (20) are contained in a sealed tubular casing (18) and in that the other part (20b) of the guide block (20) comprising the piston (22) and the cam (42) is contained in a sealed housing formed by two shells (24, 26), one (26) of the shells containing the hydraulic block.
EP04290703A 2003-03-19 2004-03-15 Electric diaphragm type fuel pump for a motor vehicle Withdrawn EP1460260A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0303338A FR2852635B1 (en) 2003-03-19 2003-03-19 ELECTRIC FUEL PUMP MEMBRANE TYPE FOR MOTOR VEHICLE.
FR0303338 2003-03-19

Publications (2)

Publication Number Publication Date
EP1460260A2 true EP1460260A2 (en) 2004-09-22
EP1460260A3 EP1460260A3 (en) 2005-10-26

Family

ID=32799687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04290703A Withdrawn EP1460260A3 (en) 2003-03-19 2004-03-15 Electric diaphragm type fuel pump for a motor vehicle

Country Status (4)

Country Link
EP (1) EP1460260A3 (en)
CN (1) CN1532401A (en)
FR (1) FR2852635B1 (en)
TW (1) TWI254100B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1813803A1 (en) * 2006-01-30 2007-08-01 MAGNETI MARELLI POWERTRAIN S.p.A. Fuel pump operated by means of a shape memory material
EP1837514A1 (en) * 2006-03-23 2007-09-26 Magneti Marelli Powertrain S.p.A. Fuel supply assembly for an internal combustion engine
WO2010069971A1 (en) * 2008-12-18 2010-06-24 Valeo Systemes De Controle Moteur Fuel injection device for motor vehicle direct injection engine
WO2010069973A1 (en) * 2008-12-18 2010-06-24 Valeo Systemes De Controle Moteur Fuel injection device for motor vehicle direct injection engine
CN109944781A (en) * 2019-04-30 2019-06-28 深圳市博威克斯科技有限公司 A kind of dual head diaphragm pump

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101251048B1 (en) * 2010-12-06 2013-04-05 기아자동차주식회사 Liquefied-Petroleum-Injection System for vehicle
CN107524608B (en) * 2016-06-22 2019-11-01 泓记精密股份有限公司 Electric fuel oil pumping
WO2019032120A1 (en) * 2017-08-11 2019-02-14 Hewlett-Packard Development Company, L.P Fluid pumps with shifters
CN109209896B (en) * 2018-10-29 2021-03-30 淼汇能源科技（上海）有限公司 High-lift water pumping device
CN114893401B (en) * 2022-05-12 2023-12-12 一汽解放汽车有限公司 Hydrogen circulating pump and vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774477A (en) * 1971-12-30 1973-11-27 D Murphy Gear motor
DE3410305C1 (en) * 1984-03-21 1985-09-05 Alldos Eichler Kg, 7507 Pfinztal Diaphragm pump
EP0556587A1 (en) * 1992-02-18 1993-08-25 Sumitomo Heavy Industries, Ltd. Series of speed increasing and reduction gear employing an inscribed meshing type planetary gear construction
JPH09242672A (en) * 1996-03-07 1997-09-16 Ouken Seiko Kk Reciprocating pump

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068982A (en) * 1976-12-20 1978-01-17 Graco Inc. Charge control valve and piston assembly for diaphragm pump
FR2814779B1 (en) * 2000-10-04 2003-01-10 Sofabex MEMBRANE ELECTRIC FUEL PUMP

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774477A (en) * 1971-12-30 1973-11-27 D Murphy Gear motor
DE3410305C1 (en) * 1984-03-21 1985-09-05 Alldos Eichler Kg, 7507 Pfinztal Diaphragm pump
EP0556587A1 (en) * 1992-02-18 1993-08-25 Sumitomo Heavy Industries, Ltd. Series of speed increasing and reduction gear employing an inscribed meshing type planetary gear construction
JPH09242672A (en) * 1996-03-07 1997-09-16 Ouken Seiko Kk Reciprocating pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 01, 30 janvier 1998 (1998-01-30) & JP 09 242672 A (OUKEN SEIKO KK), 16 septembre 1997 (1997-09-16) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1813803A1 (en) * 2006-01-30 2007-08-01 MAGNETI MARELLI POWERTRAIN S.p.A. Fuel pump operated by means of a shape memory material
EP1837514A1 (en) * 2006-03-23 2007-09-26 Magneti Marelli Powertrain S.p.A. Fuel supply assembly for an internal combustion engine
WO2010069971A1 (en) * 2008-12-18 2010-06-24 Valeo Systemes De Controle Moteur Fuel injection device for motor vehicle direct injection engine
WO2010069973A1 (en) * 2008-12-18 2010-06-24 Valeo Systemes De Controle Moteur Fuel injection device for motor vehicle direct injection engine
FR2940368A1 (en) * 2008-12-18 2010-06-25 Valeo Sys Controle Moteur Sas FUEL INJECTION DEVICE FOR MOTOR VEHICLE DIRECT INJECTION ENGINE
FR2940370A1 (en) * 2008-12-18 2010-06-25 Valeo Sys Controle Moteur Sas FUEL INJECTION DEVICE FOR MOTOR VEHICLE DIRECT INJECTION ENGINE
CN109944781A (en) * 2019-04-30 2019-06-28 深圳市博威克斯科技有限公司 A kind of dual head diaphragm pump

Also Published As

Publication number Publication date
CN1532401A (en) 2004-09-29
TWI254100B (en) 2006-05-01
FR2852635B1 (en) 2006-06-23
EP1460260A3 (en) 2005-10-26
FR2852635A1 (en) 2004-09-24
TW200502485A (en) 2005-01-16

Similar Documents

Publication Publication Date Title
EP0407436B1 (en) Motor propulsion, in particular for an automobile vehicle and vehicle comprising such a unit
EP1979595B1 (en) Electromechanical device for controlling a variable compression ratio engine
EP1460260A2 (en) Electric diaphragm type fuel pump for a motor vehicle
EP2279332B1 (en) Internal combustion engine
FR2821389A1 (en) FUEL PUMP FOR AN INTERNAL COMBUSTION ENGINE
FR2673246A1 (en) DEVICE FOR INJECTING LIQUID, PARTICULARLY FUEL, IN AT LEAST ONE PRESSURIZED CHAMBER OF A PERIODICALLY OPERATING MACHINE SUCH AS AN INTERNAL COMBUSTION ENGINE AND SUCH AN ENGINE PROVIDED WITH SUCH A DEVICE.
FR2690483A1 (en) Radial piston pump, in particular fuel pump for internal combustion engine.
FR2525697A1 (en) TWO STAGE VOLUMETRIC PUMP FOR LIQUEFIED LIQUID PHASE OIL GASES, AND FUEL INJECTION METHOD FOR MOTOR VEHICLE ENGINE USING SUCH PUMP
FR2862354A1 (en) Variable displacement pump e.g. vane pump, for internal combustion engine, has nesting ring moved transversally with respect to rotor in chamber which has sealing units acting on rings flat wheels supported on surface of chamber
EP0587479B1 (en) Two-stroke engine with pneumatic injection and first order belancing device for the alternating masses
FR2752269A1 (en) Volumetric compressor or pump with piston
FR2527683A1 (en) Four-stroke engine oil pump - has primary gear on hollow spindle and driven from centrifugal governor
EP1431524A1 (en) Pump arrangement for a combustion engine
FR2711739A1 (en) Lubrication pump for internal combustion engine
EP2391801A2 (en) Rotary engine with a circular rotor
FR2814779A1 (en) Electric diaphragm fuel pump for motor vehicle has tubular casing for motor and piston with hydraulic block having suction and feed passages and diaphragm
EP3080433A1 (en) Power train which is fitted with an actuating push-rod controlled by a cam track carried by a connecting rod
EP0180510A1 (en) Hydraulic piston pump with positively driven inlet valves
BE870198A (en) ADDITIONAL VOLUTE ELEMENTS, ESPECIALLY FOR LIQUID PUMPS
FR2819016A1 (en) Integrated internal combustion and electric machine unit, uses piston in axially rotating cylinder driven through gear by crankshaft, and has rotor winding on outside of cylinder, which rotates inside a stator winding
WO2015189530A1 (en) Improved engine with side valves
WO1999032782A1 (en) Gear-type fuel pump and vehicle equipped with same
FR2680390A1 (en) RADIAL PISTON PUMP.
WO2015114272A1 (en) Flat piston engine with a fuel injection device
EP1259716A1 (en) Generator with rotor in the form of a heat engine with rotary cylinder

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

RIC1 Information provided on ipc code assigned before grant

Ipc: 7F 02B 43/04 B

Ipc: 7F 02M 37/04 B

Ipc: 7F 04B 43/04 B

Ipc: 7F 02M 37/08 A

AKX Designation fees paid
17P Request for examination filed

Effective date: 20060325

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

17Q First examination report despatched

Effective date: 20060926

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20101001