EP1323919B1 - Pompe à combustible - Google Patents

Pompe à combustible Download PDF

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Publication number
EP1323919B1
EP1323919B1 EP20020026932 EP02026932A EP1323919B1 EP 1323919 B1 EP1323919 B1 EP 1323919B1 EP 20020026932 EP20020026932 EP 20020026932 EP 02026932 A EP02026932 A EP 02026932A EP 1323919 B1 EP1323919 B1 EP 1323919B1
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EP
European Patent Office
Prior art keywords
fuel
plunger
cylinder
holding space
pressure chamber
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.)
Expired - Lifetime
Application number
EP20020026932
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German (de)
English (en)
Other versions
EP1323919A2 (fr
EP1323919A3 (fr
Inventor
Naoki Yamamoto
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of EP1323919A2 publication Critical patent/EP1323919A2/fr
Publication of EP1323919A3 publication Critical patent/EP1323919A3/fr
Application granted granted Critical
Publication of EP1323919B1 publication Critical patent/EP1323919B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0265—Pumps feeding common rails
    • 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
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/04—Draining
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • 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

Definitions

  • the present invention relates in general to fuel pressure pumps of internal combustion engines, and more particularly to the fuel pressure pumps of a type that allows a sealing member installed therein to exhibit an excellent performance against a fuel leakage.
  • a mechanical type fuel pressure pump connected to a camshaft has been hitherto used widely.
  • a pump driving cam is mounted on the camshaft to reciprocate a corresponding plunger that is slidably received in a cylinder to provide an end of the cylinder with a pressure chamber. That is, upon movement of the plunger in the cylinder in a direction to reduce the volume of the pressure chamber, a fuel in the pressure chamber is pressurized and led into injection valves of the engine.
  • a sealing member for suppressing a fuel leakage and a fuel return passage for returning a surplus fuel back to a fuel pump. Furthermore, in order to suppress the seal member from being directly affected by a pressure fluctuation produced during exhaust stroke of the pump, there is usually employed a fuel by-pass system through which a fuel holding space formed near the seal member and the fuel return passage are connectable. That is, upon production of excessive pressure fluctuation, the fuel by-pass system becomes opened to relieve the pressure from the pressure chamber.
  • Laid-open Japanese Patent Application (Tokkal) 2000-110685 shows a fuel pressure pump of a so-called return-less type that has no means corresponding to the above-mentloned fuel return passage.
  • US-A-2 372 694 discloses a high pressure fluid pump for use in fuel injection systems for internal combustion engines, comprising a plunger bore in which a plunger is slidably received. At the upper end of the plunger bore, a pressure chamber is defined for pressing the fluid when the plunger is moved in the upper direction.
  • a low pressure fluid passage communicating with communication passages is provided for supplying fluid through a passage inside the plunger to the pressure chamber.
  • a seal member is provided to seal a leakage recess defining a fluid holding space. The communicating passage connects the leakage recess to the low pressure fluid passage.
  • a fuel pressure pump of an internal combustion engine which exhibits an excellent fuel leakage suppression performance irrespective of employment of the return-less type.
  • FIG. 1 there is shown a fuel supply system 1 to which a fuel pressure pump 4A of a first embodiment of the invention is practically applied.
  • fuel supply system 1 generally comprises a fuel tank 2, a low pressure fuel pump unit 3, a fuel pressure pump 4A, injectors 5 and an engine control unit 6.
  • Low pressure fuel pump unit 3 and fuel pressure pump 4A are connected through a low pressure fuel passage 7, and fuel pressure pump 4A and injectors 5 are connected through a high pressure fuel passage 8.
  • Low pressure fuel pump unit 3 is installed in fuel tank 2 and comprises a fuel feed pump 31, a fuel filter 32 and a low pressure regulator 33.
  • Feed pump 31 functions to discharge fuel from fuel tank 2, and fuel filter 32 functions to filtrate fuel discharged from fuel tank 2.
  • low pressure regulator 33 is arranged to bypass the line including feed pump 31 and fuel filter 32 and functions to regulate the fuel pressure to a fixed lower pressure.
  • fuel pressure pump 4A comprises a pump proper 41, an electromagnetic valve 42 and a discharge check valve 43.
  • pump proper 41 comprises a pump housing 44 mounted on a cylinder head or the like of an engine.
  • Pump housing 44 is provided with a cylinder 441.
  • a cylindrical plunger 45 there is slidably received a cylindrical plunger 45.
  • a pressure chamber 442 between a closed upper end of cylinder 441 and a top surface 45a of cylindrical plunger 45.
  • a tappet 46 is connected to a lower end of plunger 45.
  • a return spring 47 is compressed between tappet 46 and pump housing 44 to constantly bias cylindrical plunger 45 downward in Fig. 2 .
  • a camshaft 9 which has a pump driving cam 9a that can abut against tappet 46.
  • Pump housing 44 is formed with both a first fuel supply passage 443 that is connected to low pressure fuel passage 7 and a second fuel supply passage 444 that is connected to high pressure fuel passage 8.
  • First fuel supply passage 443 is connected to pressure chamber 442 through a fuel inlet passage 445, while, second fuel supply passage 444 is connected to pressure chamber 442 through a fuel outlet passage 446.
  • Fuel inlet passage 445 through which first fuel supply passage 443 and pressure chamber 442 are connected is selectively opened and closed by electromagnetic valve 42.
  • This electromagnetic valve 42 comprises a valve head 421 that faces fuel inlet passage 445, a return spring 423 that biases valve head 421 in a direction to close fuel inlet passage 445 and a solenoid 422 that, when energized, pushes valve head 421 in a direction to open fuel inlet passage 445 against force of return spring 423.
  • discharge check valve 43 that selectively opens and closes fuel outlet passage 446 that connects second fuel supply passage 444 and pressure chamber 442. That is, when the fuel pressure in pressure chamber 442 becomes higher than that appearing in high pressure fuel passage 8, discharge check valve 43 is forced to open fuel outlet passage 446.
  • auxiliary cylindrical chamber 447 In a lower portion of pump housing 44, there is formed an auxiliary cylindrical chamber 447 that is merged and coaxial with a chamber of cylinder 441. As shown, this auxiliary cylindrical chamber 447 is larger in diameter than the chamber of cylinder 441.
  • Seal member 48 comprises generally paired sealing lips 48a that are made of a rubber material and a supporting piece 48b that is fixed to the inner surface of auxiliary cylindrical chamber 447 to support the paired sealing lips 48a. As shown, tips of sealing lips 48a are elastically pressed against a cylindrical outer surface of cylindrical plunger 45 to achieve a hermetical sealing between the cylindrical inner surface of auxiliary cylindrical chamber 447 and the cylindrical outer surface of cylindrical plunger 45. With this sealing, pressurized fuel in pressure chamber 442 is suppressed from being leaked to the outside and at the same time, lubrication oil lubricating camshaft 9 is suppressed from being led into the chamber of cylinder 441.
  • first fuel holding space 448 that is defined essentially by the cylindrical inner surface of cylinder 441, the cylindrical outer surface of plunger 45 and seal member 48. More specifically, first fuel holding space 448 is defined by an inner surface of auxiliary cylindrical chamber 447, an outer surface of cylindrical plunger 45 and seal member 48.
  • a second fuel holding space 449 that is arranged to extend around cylindrical plunger 45, as shown.
  • Figs. 3A, 3B and 3C show three examples of the second fuel holding space 449, respectively.
  • the second space 449 is defined by an annular groove 441a that is formed in the cylindrical inner surface of cylinder 441.
  • the second space 449 is defined by an annular groove 45a that is formed around cylindrical plunger 45
  • the second space 449 is defined by both an annular groove 441a formed in the cylindrical inner surface of cylinder 441 and an annular groove 45a formed around cylindrical plunger 45.
  • first connection passage 450 that connects first fuel holding space 448 and first fuel supply passage 443 and a second connection passage 451 that connects second fuel holding space 449 and first fuel supply passage 443.
  • injectors 5 are connected to respective cylinders of the engine, and each injector 5 is controlled to assume an open position upon receiving a pulse signal that is applied thereto at a given injection timing. During open period, each injector 5 injects a pressure-controlled pressurized fuel into a combustion chamber of the corresponding cylinder. Remaining fuel that is not injected is returned to fuel tank 2 through a relief passage 10 and a relief valve 11.
  • Engine control unit 6 carries out various operation controls for engine, such as fuel injection control and the like by processing various information signals fed thereto from various sensors such as a fuel pressure sensor 13 connected to high pressure fuel passage 8. That is, fuel feed pump 31, electromagnet valve 42 and injectors 5 are all controlled by instruction signals issued from engine control unit 6.
  • fuel in fuel tank 2 is controlled to have a given lower pressure and led into low pressure fuel passage 7 by low pressure fuel pump unit 3.
  • electromagnetic valve 42 In discharge stroke of pressure pump 4A wherein plunger 45 is moved upward (viz., in the direction of arrow Y) due to work of pump driving cam 9a, electromagnetic valve 42 is controlled to assume its close position. That is, solenoid of valve 42 is de-energized. It is to be noted that a fuel feeding rate of pressure pump 4A is controlled by controlling a valve open timing of electromagnetic valve 42.
  • the pressure produced in pressure chamber 442 shows such a characteristic as shown in the graph of Fig. 4 . That is, as is seen from this graph and Fig. 2 , the fuel pressure in pressure chamber 442 is inevitably leaked to the first fuel holding space 448 of seal member 48 through a clearance that is defined between the cylindrical inner surface of cylinder 441 and the cylindrical outer surface of plunger 45 while being attenuated.
  • reference P1 denotes the fuel pressure appearing in an inlet portion of first fuel supply passage 443 (see Fig. 2 )
  • P2 denotes the fuel pressure appearing in pressure chamber 442
  • P3 denotes the fuel pressure appearing in a mutually contacting portion between cylinder 441 and plunger 45 at a position nearer to pressure chamber 442 than second fuel holding space 449
  • P4 denotes the fuel pressure appearing in a mutually contacting portion between cylinder 441 and plunger 45 at a position nearer to camshaft 9 than second fuel holding space 449
  • P5 denotes the fuel pressure appearing in first fuel holding space 448.
  • first fuel holding space 448 and first fuel supply passage 443 are connected through first connection passage 450.
  • the pressure (viz., pressure wave) appearing in pressure chamber 442 is inevitably exposed or led to first fuel supply passage 443, so that much higher pressure reduction effect (viz., P4 ⁇ P5) is carried out as compared with a case (viz., P4' ⁇ P5') wherein there is no means corresponding to first connection passage 450, that is, first fuel holding space 448 has a closed end.
  • seal member 48 is suppressed or at least minimized from being affected by a pressure fluctuation produced in pressure chamber 422, and thus, durability of seal member 48 is increased.
  • first fuel holding space 448 is constructed to have a sufficiently large volume, damping effect is much effectively made, which brings about a much effective pressure reduction effect.
  • the diameter "D" of first fuel holding space 448 is greater than the outer diameter "Ds" of seal member 48.
  • the mutually contacting portion between cylinder 441 and plunger 45 can have a sufficient length "L” and thus undesirable inclination of plunger 45 relative to cylinder 441 is suppressed and thus a so-called one-sided wearing therebetween is suppressed or at least minimized.
  • the fuel in first fuel holding space 448 can smoothly circulate through the passage without gathering therein, and thus, seal member 48 is suppressed from being heated. That is, sealing lips 48a of seal member 48 are protected from a thermal deterioration.
  • second connection passage 451 that connects second fuel holding space 449 and first fuel supply passage 443. Accordingly, the second connection passage 451 functions to expose the pressure wave to first fuel supply passage 443. Accordingly, much higher pressure reduction effect (P3 ⁇ P4) is carried out as compared with a case (P3 ⁇ P4') wherein there is no means corresponding to second connection passage 451.
  • the seal member 48 is suppressed from being affected by the pressure fluctuation and thus, the seal member 48 can have a longer life.
  • second fuel holding space 449 at the mutually contacting portion between cylinder 441 and plunger 45, in addition to first fuel holding space 448 that is defined by cylinder 441, plunger 45 and seal member 48.
  • a plurality of second fuel holding spaces 449a, 449b and 449c may be provided in place of the single second fuel holding space 449.
  • respective connection passages 451a, 451b and 451c are provided for connecting the spaces 449a, 449b and 449c with first fuel supply passage 443, as shown.
  • the volume of the three second fuel holding spaces 449'a, 449'b and 449'c may gradually increase with increase of distance from pressure chamber 442.
  • the depth "d" of annular grooves 441a formed in the cylindrical inner surface of cylinder 441 increases with increase of distance from pressure chamber 442.
  • the width "w" of annular grooves 441a may increase with increase of distance from pressure chamber 442, or such grooves may be provided in the cylindrical outer surface of plunger 45.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (11)

  1. Pompe de pression à combustible (4A, 4B, 4C, 4D) pour utilisation avec un moteur à combustion interne, comprenant:
    un vérin (441);
    un plongeur (45) reçu d'une manière coulissante dans le vérin pour définir à une extrémité du vérin (441) une chambre de pression (442), la chambre de pression (442) mettant en pression un combustible à l'intérieur lorsque le plongeur (45) se déplace dans une direction pour réduire un volume de la chambre de pression (442);
    un passage d'amenée de combustible (443) à travers lequel le combustible est mené à la chambre de pression (442);
    un élément d'étanchéité (48) réalisé à une position autre qu'une position où une surface interne du vérin (441) et une surface externe du plongeur (45) sont en prise de coulissement, l'élément d'étanchéité (48) atteignant une étanchéité hermétique entre la surface interne du vérin (441) et la surface externe du plongeur (45); et
    un premier espace de retenue de combustible (448) défini par la surface interne du vérin (441), la surface externe du plongeur (45) et l'élément d'étanchéité (48), et
    un premier passage de connection (450) qui relie le premier espace de retenue de combustible (448) et le passage d'amenée de combustible (443),
    caractérisée par
    un passage d'admission de combustible (445) par lequel le passage d'amenée de combustible (443) et la chambre de pression (442) sont directement connectées; et
    une vanne électromagnétique (42) ayant une tête de vanne (421), la tête de vanne (421) étant agencée pour fermer et ouvrir sélectivement le passage d'admission de combustible (445).
  2. Pompe de pression à combustible selon la revendication 1, caractérisée par un deuxième espace de retenue de combustible (449) défini à une position où la surface interne du vérin (441) et la surface externe du plongeur (45) sont en prise de coulissement, le deuxième espace de retenue de combustible (449) ayant un plus grand volume qu'un espace défini entre la surface interne du vérin (441) et la surface externe du plongeur (45); et
    un deuxième passage de connection (451) qui relie le deuxième espace de retenue de combustible (449) et le passage d'amenée de combustible (443).
  3. Pompe de pression à combustible selon la revendication 2, caractérisée en ce que le deuxième espace de retenue de combustible (449) comprend une pluralité d'espaces de retenue (449a, 449b, 449c) qui sont agencés autour à des portions axialement différentes du plongeur (45) respectivement, chaque espace de retenue (449a, 449b, 449c) étant relié au passage d'amenée de combustible (443) par un passage de connection correspondant (451a, 451b, 451c).
  4. Pompe de pression à combustible selon la revendication 3, caractérisée en ce qu'un volume de la pluralité d'espaces de retenue (449a, 449b, 449c) augmente avec une augmentation de la distance de la chambre de pression (442).
  5. Pompe de pression à combustible selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la surface interne du vérin (441) a une forme cylindrique, et la surface externe du plongeur a une forme cylindrique de sorte que les premier et deuxième espaces de retenue (448, 449) ont une forme annulaire.
  6. Pompe de pression à combustible selon la revendication 5, caractérisée en ce que l'élément d'étanchéité (48) a une forme annulaire, et le premier espace de retenue de combustible (448) possède un diamètre externe (D) qui est plus grand qu'un diamètre externe (Ds) de l'élément d'étanchéité annulaire (48).
  7. Pompe de pression à combustible selon la revendication 1 ou 2, caractérisée en ce que le deuxième espace de retenue de combustible (449) est défini par une rainure (441a) qui est ménagée dans la surface interne du vérin (441).
  8. Pompe de pression à combustible selon la revendication 1 ou 2, caractérisée en ce que le deuxième espace de retenue de combustible (449) est défini par une rainure (45a) qui est ménagée dans la surface externe du plongeur (45).
  9. Pompe de pression à combustible selon la revendication 1 ou 2, caractérisée en ce que le deuxième espace de retenue de combustible (449) est défini par:
    une rainure (441a) qui est ménagée dans la surface interne du vérin (441); et
    une rainure (45a) qui est ménagée dans la surface externe du plongeur (45).
  10. Pompe de pression à combustible selon l'une des revendications 1 à 9, caractérisée par un passage de sortie de combustible (446) par lequel la chambre de pression (442) est reliée aux injecteurs de carburant (5) du moteur; et
    un clapet de non-retour (43) agencé pour fermer et ouvrir sélectivement le passage de sortie de combustible (446), le clapet de non-retour (43) étant sollicité dans une direction pour fermer le passage de sortie de combustible (446) contre une pression de combustible produite dans la chambre de pression (442).
  11. Pompe de pression à combustible selon l'une quelconque des revendications 1 à 10, caractérisée par un poussoir (46) relié au plongeur (45) pour se déplacer avec celui-ci;
    un ressort (47) incorporé dans le plongeur (45) pour solliciter le plongeur (45) dans une direction pour augmenter le volume de la chambre de pression (442); et
    une came d'entraînement de pompe (9a) disposée sur un arbre à cames (9) du moteur, la came d'entraînement (9a) étant apte à pousser le poussoir (46) dans une direction pour réduire le volume de la chambre de pression (442) lorsque l'arbre à cames (9) tourne.
EP20020026932 2001-12-28 2002-12-03 Pompe à combustible Expired - Lifetime EP1323919B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001400183 2001-12-28
JP2001400183A JP3815324B2 (ja) 2001-12-28 2001-12-28 内燃機関の燃料加圧ポンプ

Publications (3)

Publication Number Publication Date
EP1323919A2 EP1323919A2 (fr) 2003-07-02
EP1323919A3 EP1323919A3 (fr) 2005-08-17
EP1323919B1 true EP1323919B1 (fr) 2009-11-04

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Family Applications (1)

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EP20020026932 Expired - Lifetime EP1323919B1 (fr) 2001-12-28 2002-12-03 Pompe à combustible

Country Status (3)

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EP (1) EP1323919B1 (fr)
JP (1) JP3815324B2 (fr)
DE (1) DE60234240D1 (fr)

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DE102011007781A1 (de) * 2011-04-20 2012-10-25 Continental Automotive Gmbh Steckpumpe

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EP1517039A1 (fr) * 2003-09-22 2005-03-23 Delphi Technologies, Inc. Ensemble de pompage
JP4625789B2 (ja) * 2006-07-20 2011-02-02 日立オートモティブシステムズ株式会社 高圧燃料ポンプ
SE530565C2 (sv) * 2006-11-10 2008-07-08 Scania Cv Ab Bränslepumpanordning
DE102007019909B4 (de) * 2007-04-27 2019-07-11 Man Energy Solutions Se Kraftstoffpumpe mit Leckagenuten
JP4655122B2 (ja) * 2008-08-07 2011-03-23 株式会社デンソー 高圧ポンプの燃料導入方法
JP4736142B2 (ja) * 2009-02-18 2011-07-27 株式会社デンソー 高圧ポンプ
US8308450B2 (en) 2009-03-05 2012-11-13 Cummins Intellectual Properties, Inc. High pressure fuel pump with parallel cooling fuel flow
EP2287462B1 (fr) * 2009-07-08 2012-04-18 Delphi Technologies Holding S.à.r.l. Unité de pompe
US8678779B2 (en) * 2010-03-05 2014-03-25 Hitachi, Ltd. Fuel pump
JP5071525B2 (ja) * 2010-06-09 2012-11-14 株式会社デンソー 高圧ポンプ
JP6098481B2 (ja) * 2013-11-12 2017-03-22 株式会社デンソー 高圧ポンプ
DE102014014344A1 (de) * 2014-09-27 2016-03-31 Man Diesel & Turbo Se Kraftstoffpumpe
DE102014014475A1 (de) * 2014-09-27 2016-03-31 Man Diesel & Turbo Se Kraftstoffpumpe
IT201600106480A1 (it) * 2016-10-21 2018-04-21 Bosch Gmbh Robert Pompa di alta pressione per alimentare combustibile ad un motore a combustione interna e metodo di controllo della pompa
CN106499558A (zh) * 2017-01-04 2017-03-15 北京亚新科天纬油泵油嘴股份有限公司 一种防泄漏防油污的柱塞偶件及应用其的喷油泵

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JP2000110685A (ja) 1998-10-08 2000-04-18 Toyota Motor Corp 内燃機関の高圧燃料供給装置
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EP1323919A2 (fr) 2003-07-02
EP1323919A3 (fr) 2005-08-17
JP3815324B2 (ja) 2006-08-30
JP2003201934A (ja) 2003-07-18
DE60234240D1 (de) 2009-12-17

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