EP2344749B1 - Pompe haute pression à carburant pour un moteur à combustion interne - Google Patents

Pompe haute pression à carburant pour un moteur à combustion interne Download PDF

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Publication number
EP2344749B1
EP2344749B1 EP09782970.9A EP09782970A EP2344749B1 EP 2344749 B1 EP2344749 B1 EP 2344749B1 EP 09782970 A EP09782970 A EP 09782970A EP 2344749 B1 EP2344749 B1 EP 2344749B1
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EP
European Patent Office
Prior art keywords
pressure
high pressure
pump
fuel pump
valve
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.)
Active
Application number
EP09782970.9A
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German (de)
English (en)
Other versions
EP2344749A1 (fr
Inventor
Bernd Schroeder
Berthold Pfuhl
Peter Ropertz
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP2344749A1 publication Critical patent/EP2344749A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—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
    • F02M59/04—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/005—Pressure relief valves
    • 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
    • F02M59/361—Valves being actuated mechanically
    • 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
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • 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
    • 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
    • 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
    • F02M59/46—Valves
    • 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
    • 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
    • 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
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/0245—Means for varying pressure in common rails by bleeding fuel pressure between the high pressure pump and the common rail
    • 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
    • F02M59/02—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 invention relates to a high-pressure fuel pump for an internal combustion engine according to the preamble of claim 1.
  • Direct-injection high-pressure fuel pumps usually have a low-pressure range and a high-pressure range.
  • An electric prefeed pump delivers the fuel from a tank into the low-pressure region, from which the fuel is conveyed via the high-pressure fuel pump into a fuel rail ("common rail") connected to the high-pressure region.
  • the pressure in the fuel rail is usually controlled by a pressure control and / or a quantity control valve, the valves u.a. be controlled by an evaluation of signals from a pressure sensor of a control and / or regulating device.
  • the pressure control valve can also work mechanically.
  • WO 2005/031161 A2 From the WO 2005/031161 A2 is a high-pressure fuel pump with a pressure damper known. Through the pressure damper, the fuel flows into the pump element of the high-pressure fuel pump.
  • the object of the invention is to provide or further develop a fuel high-pressure pump for an internal combustion engine of the type mentioned, which works reliably and is compact.
  • the fuel high-pressure pump should be inexpensive.
  • the high-pressure fuel pump On account of the configuration of the high-pressure fuel pump, on the one hand installation space in the engine compartment of a motor vehicle is saved; on the other hand, the well-known external dimensions of the high-pressure fuel pump can be maintained by clever integration of the pressure control device in the high-pressure fuel pump. Additional hydraulic lines are not required. This advantageously leads to a very compact construction of the high-pressure fuel pump. Due to the omission of the quantity control of the fuel, the high-pressure fuel pump also requires no quantity control valve with an associated output stage and an electrical control line. Furthermore, the pressure sensor necessary for an electronic control can be dispensed with. This makes the invention particularly cost effective and also saves engine power. Since the unnecessary amount of fuel is diverted to the low pressure range, a pressure limiting function is guaranteed.
  • the present invention is based on the idea that when using a less pressure-sensitive fuel system in an internal combustion engine, for example, a constant pressure system, can be dispensed with a complex electronic quantity control of fuel.
  • the pressure control in the high pressure area is carried out in this condition then via a mechanical pressure control device which is integrated into the high-pressure pump.
  • the pressure control device is arranged hydraulically between the low-pressure region and the high-pressure region.
  • the unused amount of fuel from the high pressure area is returned to the low pressure area.
  • an at least substantially constant pressure on the high-pressure side arises during operation of the internal combustion engine.
  • the mechanical pressure control device comprises a mechanical pressure control valve, in particular a mechanical, for example, spring-loaded check valve.
  • Mechanical pressure control valves are relatively simple, reliable and therefore inexpensive. This especially applies to check valves. Such also builds extremely small and is therefore easily integrated into the high-pressure fuel pump.
  • a mechanical throttle is arranged upstream, so that negative effects on the control behavior in the fuel rail, especially when using single-cylinder fuel pumps, due to unwanted pressure pulsations of the high-pressure pump can be reduced. This reduces wear of the pressure regulating valve.
  • the throttle may be formed as a separate throttle element or other cross-sectional constriction in a high pressure side inlet channel, a valve seat body or a receiving opening in the pump housing.
  • the pressure control valve is arranged eccentrically in the pump housing of the high-pressure fuel pump in a bore, and that optionally also a connection bore is arranged eccentrically from the pressure regulating valve to the high-pressure region.
  • the central central region in the pump housing is known to be reserved for the actual pump functions of the high-pressure fuel pump. In the off-center area, however, there is enough room to integrate the pressure control function. This makes the high-pressure fuel pump to a very effective and compact structure. In addition, this makes the machining of the pump housing easier.
  • a limit pressure in the high-pressure region is established by a valve spring and / or a sealing diameter between valve element and valve seat of the pressure regulating device.
  • the pressure control device has a cartridge-like valve housing.
  • the pressure control device can be manufactured and adjusted as a separate module and then added to the pump housing and, for example, held by a pressure between the sleeve and the pump housing.
  • the adjustment of the function of the pressure control valve is easier because among other things, with a hydraulic adjustment of the opening pressure, the pump housing does not have to be cleaned for further assembly steps.
  • the pump housing is not a reject part in a misadjustment.
  • the inlet valve is arranged coaxially with the pump piston of the high-pressure fuel pump. This makes it possible to achieve a high degree of delivery of fuel from the low-pressure region, which is further enhanced if, between a pressure damper of the high-pressure fuel pump and the inlet valve, the diameter of the corresponding connection bore is relatively large with respect to the opening of the inlet valve.
  • FIG. 1 shows a schematic representation of a fuel system 8 for an internal combustion engine (not shown) with a high-pressure fuel pump 10.
  • the fuel system is, as will be explained, in an in FIG. 1 subdivided low-pressure region 12 shown on the left hand side and a high pressure region 14 shown on the right hand side.
  • a pre-feed pump 16 arranged in the low-pressure region 12 pumps fuel from a fuel reservoir 18 via a low-pressure line 20 with a prefeed pressure to an inlet connection 22 of the high-pressure fuel pump 10.
  • a filter 24 and a pressure damper 26 are arranged in the low-pressure region 12.
  • the pressure damper 26 dampens pulsations arising in the high-pressure fuel pump 10 on the low-pressure side and ensures a high delivery rate even with high numbers of rotations and cams.
  • the fuel is sucked into a working chamber 30 of the high-pressure fuel pump 10.
  • the volume of the working space 30 depends on the position of a pump piston 32 in a pump cylinder 34.
  • the working space 30 is increased, whereby fuel is sucked.
  • the fuel is highly compressed and conveyed via an outlet valve 36 and an outlet connection 38 belonging to the high-pressure region 14 via a high-pressure line 40 into a rail 42.
  • injectors 44 are connected, which inject the fuel directly into combustion chambers 46 of the internal combustion engine.
  • the pump piston 32 is driven by a cam 48, which is driven by the internal combustion engine - for example via a cam or crankshaft (not shown).
  • the cam 48 may also be part of the cam or crankshaft.
  • a piston leakage, which arises in the gap between the pump piston 32 and the pump cylinder 34 is returned via a return line 52 in the low pressure region 12.
  • pulsations occur. These pulsations could adversely affect the pressure control function in the rail 42.
  • a throttle 56 is arranged hydraulically in front of the pressure regulating valve 54, whereby the pulsations before the pressure regulating valve 54 and its wear are reduced.
  • FIG. 2 shows the high-pressure fuel pump 10 in a perspective view.
  • the inlet connection 22 (low-pressure region 12) and the outlet connection 38 (high-pressure region 14) are arranged on a pump housing 58.
  • a filter 64 is integrated in the inlet pipe 22 in the inlet pipe 22.
  • the high-pressure fuel pump 10 comprises an inwardly dented cover 66 and a flange plate 68 for fastening the high-pressure fuel pump 10, for example, to a cylinder head of the internal combustion engine. Both parts 66 and 68 are fixedly connected to the pump housing 58.
  • the pump piston 32 projects out of the pump housing 58 down.
  • a piston spring 70 is supported on the one hand on a spring plate 72 which is fixedly connected to the pump piston 32, and on the other hand (not visible) on the pump housing 58 from.
  • the force of the piston spring 70 is thus introduced via the spring plate 72 in the pump piston 32. This ensures during operation that the pump piston 32 always follows the cam contour.
  • FIG. 3 shows the inlet port 22 is connected to the filter 64 via a to a longitudinal axis 73 of the pump housing 58 eccentric bore 74 with a lying below the cover 66 receiving space (no reference numeral) for the pressure damper 26.
  • the receiving space is in turn connectable to the pump working chamber 30 via two bore sections 78 and 80 coaxial with the pump housing 58 and the inlet valve 28.
  • the pump piston 32 is displaceably mounted in a cylinder liner 82. During a suction phase of the pump piston 32, the fuel passes through the holes 78 and 80 and the inlet valve 28 into the pump working space 30.
  • the pump working chamber 30 and the outlet valve 36 are hydraulically connected via a bore 88 in the pump housing 58 with each other.
  • the pressure control valve 54 is arranged eccentrically in the pump housing 58 in a bore 90 in parallel to the longitudinal axis 73. The cutting plane of FIG. 5 So it is not centered, but is spaced from the longitudinal axis 73.
  • High pressure side the pressure regulating valve 54 is connected via a spaced from the longitudinal axis 73 bore 92 with the outlet valve 36.
  • the pressure regulating valve 54 is connected via the bore 90 with the receiving space for the pressure damper 26.
  • the pressure regulating valve 54 includes a valve seat (not numbered) on a valve seat body 94 with an inlet bore 95, a ball valve body 96, a spring guide 98, a valve spring 100 and a spring holder 102nd
  • valve seat body 94 is firmly anchored, for example via a pressure in the bore 90.
  • the valve spring 100 pushes the valve body 96 into the valve seat.
  • the valve body is spherical.
  • the valve spring 100 is supported on the spring holder 102.
  • the spring holder 102 is in turn firmly anchored in the bore 90 (for example via a pressure).
  • the opening pressure is set via the press-in path of the spring holder 102.
  • the high-pressure fuel pump 10 operates as follows: During a downward movement of the pump piston 32 ("suction stroke"), fuel is injected via the inlet valve 28 into the working space 30. During an upward movement (“delivery stroke”), the fuel in the working space 30 is compressed and conveyed via the outlet valve 36 into the high-pressure line 40. Exceeds the pressure in the high pressure region 14, the limit pressure of the pressure control valve 54, this opens by the valve body 96 lifts off the valve seat, so that fuel can flow into the receiving space of the pressure damper 26 and thus in the low pressure region 12. If the pressure in the high-pressure region 14 drops below the limiting pressure of the pressure regulating valve 54, this closes again. In this way, the pressure in the high-pressure region 14 is kept substantially constant, namely at the limit pressure or opening pressure of the pressure regulating valve 54.
  • FIG. 7 shows a variant of the high-pressure fuel pump 10. It is true that such elements and areas that have equivalent functions to previously described elements and Beeez, carry the same reference numerals and are not explained again.
  • the pressure regulating valve 54 is realized as a cartridge solution.
  • the assembly of the pressure control valve 54 and the setting of the opening pressure can be done outside of the pump housing 58 here.
  • the valve seat body 94 is inserted into a sleeve 104 and held, for example via a pressure.
  • the spring guide 98 and the valve spring 100 and the spring holder 102 is inserted into the sleeve 104. Again, the spring force and thus the opening pressure is adjusted by the position of the spring holder 102.
  • the spring holder 102 may, as in FIG. 7 shown, are screwed into the sleeve 104.
  • pressing is also possible.
  • a throttle 56 is further positioned in the bore 92. It is also conceivable to arrange the throttle 56 in the bore 90. As an alternative to the throttle 56, the inlet bore 95 can also have a reduced cross-section in some areas in the valve seat body 94, as a result of which a throttling function is likewise achieved.

Landscapes

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

Claims (11)

  1. Pompe à carburant haute pression (10) pour un moteur à combustion interne à injection directe, comprenant un carter de pompe (58), une soupape d'entrée (28), une soupape de sortie (36), un amortisseur de pression (26), une zone basse pression du côté de l'entrée (12) et une zone haute pression (14) du côté de la sortie, caractérisée en ce que la pompe à carburant haute pression (10) présente un dispositif de régulation de la pression purement mécanique (54) pour réguler une pression constante dans la région haute pression (14), en ce que le dispositif de régulation de pression (54) présente un siège de soupape, un corps de siège de soupape (94) avec un alésage d'entrée (95), un corps de soupape à bille en forme de bille (96), un guide à ressort (98), un ressort de soupape (100) et un support de ressort (102), en ce qu'une entrée du dispositif de régulation de pression (54) est connectée à la région haute pression (14) de la pompe à carburant haute pression (10) et en ce qu'une sortie du dispositif de régulation de pression (54) est connectée à un espace de réception de l'amortisseur de pression (26) et en ce que la pompe à carburant haute pression présente un carter de pompe (58), en ce qu'un couvercle (66) est connecté fixement au carter de pompe (58), en ce qu'un espace de réception de l'amortisseur de pression (26) est situé en dessous du couvercle (66), en ce qu'une tubulure d'entrée (22) est connectée par le biais d'un alésage (74) excentrique et parallèle à un axe longitudinal (73) du carter de pompe (58) à l'espace de réception situé sous le couvercle (66) pour l'amortisseur de pression (26), en ce que l'espace de réception est connecté par le biais de la soupape d'entrée (28) à l'espace de travail de la pompe (30) et le dispositif de régulation de pression (54) dans le carter de pompe (58) est disposé de manière excentrée dans un alésage (90) servant d'ouverture de réception parallèlement à l'axe longitudinal (73) du carter de pompe (58).
  2. Pompe à carburant haute pression (10) selon la revendication 1, caractérisée en ce que le dispositif de régulation de pression mécanique comprend une soupape de régulation de pression mécanique, en particulier un clapet antiretour mécanique (54).
  3. Pompe à carburant haute pression (10) selon la revendication 1 ou 2, caractérisée en ce qu'en amont d'un élément de soupape (54) du dispositif de régulation de pression (54) est disposé un étranglement (56).
  4. Pompe à carburant haute pression (10) selon la revendication 3, caractérisée en ce que l'étranglement (56) est réalisé dans un boîtier de siège de soupape de la soupape de régulation de pression (54) et/ou dans un alésage de connexion (92) dans le carter de pompe (58) pour le dispositif de régulation de pression (54) et/ou dans un canal d'alimentation au dispositif de régulation de pression (54).
  5. Pompe à carburant haute pression (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de régulation de pression (54) est disposé dans le carter de pompe cylindrique (58) dans l'ouverture de réception (90) disposée de manière décalée par rapport à l'axe longitudinal (73) du carter de pompe (58).
  6. Pompe à carburant haute pression (10) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un alésage de connexion (92) s'étendant transversalement à l'axe longitudinal (73) du carter de pompe (58) depuis le dispositif de régulation de pression (54) jusqu'à la région haute pression (14) est espacé de l'axe longitudinal (73).
  7. Pompe à carburant haute pression (10) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une pression de limitation dans la région haute pression (14) est établie au niveau du dispositif de régulation de pression (54) par le ressort de soupape (100) et/ou par un diamètre d'étanchéité entre l'élément de soupape (96) et le siège de soupape (94).
  8. Pompe à carburant haute pression (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de régulation de pression (54) présente un boîtier de soupape en forme de cartouche (104), qui est inséré, de préférence enfoncé, dans l'ouverture de réception (90) du carter de pompe (58).
  9. Pompe à carburant haute pression (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que la soupape d'entrée (28) est disposée coaxialement à un piston de pompe (32) de la pompe à carburant haute pression (10).
  10. Pompe à carburant haute pression (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de régulation de pression (54) est disposé parallèlement à un piston de pompe (32) de la pompe à carburant haute pression (10) dans l'ouverture de réception (90) du carter de pompe (58).
  11. Pompe à carburant haute pression (10) selon la revendication 10, caractérisée en ce que l'ouverture de réception (90) est connectée par le biais d'un alésage de connexion (92) à la région haute pression (14) de la pompe à carburant haute pression (10).
EP09782970.9A 2008-10-28 2009-09-14 Pompe haute pression à carburant pour un moteur à combustion interne Active EP2344749B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008043217A DE102008043217A1 (de) 2008-10-28 2008-10-28 Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine
PCT/EP2009/061875 WO2010049207A1 (fr) 2008-10-28 2009-09-14 Pompe haute pression à carburant pour un moteur à combustion interne

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EP2344749A1 EP2344749A1 (fr) 2011-07-20
EP2344749B1 true EP2344749B1 (fr) 2016-05-04

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EP (1) EP2344749B1 (fr)
KR (1) KR101644813B1 (fr)
CN (2) CN102197211B (fr)
DE (1) DE102008043217A1 (fr)
ES (1) ES2585736T3 (fr)
WO (1) WO2010049207A1 (fr)

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EP4124745A1 (fr) 2021-07-28 2023-02-01 Robert Bosch GmbH Pompe haute pression à carburant
DE102021208052A1 (de) 2021-07-27 2023-02-02 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoff-Hochdruckpumpe
WO2023006289A1 (fr) 2021-07-28 2023-02-02 Robert Bosch Gmbh Pompe à carburant haute pression
DE102021209835A1 (de) 2021-09-07 2023-03-09 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoff-Hochdruckpumpe

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DE102021208052A1 (de) 2021-07-27 2023-02-02 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoff-Hochdruckpumpe
WO2023006285A1 (fr) 2021-07-27 2023-02-02 Robert Bosch Gmbh Pompe à carburant haute pression
EP4124745A1 (fr) 2021-07-28 2023-02-01 Robert Bosch GmbH Pompe haute pression à carburant
WO2023006289A1 (fr) 2021-07-28 2023-02-02 Robert Bosch Gmbh Pompe à carburant haute pression
DE102021208122A1 (de) 2021-07-28 2023-02-02 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoff-Hochdruckpumpe
DE102021208119A1 (de) 2021-07-28 2023-02-02 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoff-Hochdruckpumpe
DE102021209835A1 (de) 2021-09-07 2023-03-09 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoff-Hochdruckpumpe

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KR101644813B1 (ko) 2016-08-02
WO2010049207A1 (fr) 2010-05-06
DE102008043217A1 (de) 2010-04-29
EP2344749A1 (fr) 2011-07-20
US20110209687A1 (en) 2011-09-01
ES2585736T3 (es) 2016-10-07
US20160319795A1 (en) 2016-11-03
CN102197211A (zh) 2011-09-21
CN105888906A (zh) 2016-08-24
CN102197211B (zh) 2016-05-04
KR20110074891A (ko) 2011-07-04

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