WO2011088958A1 - Pompe à haute pression - Google Patents

Pompe à haute pression Download PDF

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Publication number
WO2011088958A1
WO2011088958A1 PCT/EP2010/070861 EP2010070861W WO2011088958A1 WO 2011088958 A1 WO2011088958 A1 WO 2011088958A1 EP 2010070861 W EP2010070861 W EP 2010070861W WO 2011088958 A1 WO2011088958 A1 WO 2011088958A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
pressure pump
gear
camshaft
pressure
Prior art date
Application number
PCT/EP2010/070861
Other languages
German (de)
English (en)
Inventor
Friedrich Boecking
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2011088958A1 publication Critical patent/WO2011088958A1/fr

Links

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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • 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 to a high pressure pump for a common rail injection system according to the preamble of claim 1.
  • Such a high pressure pump is known for example from DE 103 22 604 A1.
  • the designed as a radial piston pump high-pressure pump is at least partially disposed in the housing of the internal combustion engine, so that the camshaft of the internal combustion engine can drive the piston of the radial piston pump via roller or bucket tappets.
  • a high-pressure pump for a common-rail injection system which has a pump shaft whose rotational movement is converted by at least one cam into a lifting movement of at least one pump piston of the high-pressure pump, wherein the rotational movement of the pump shaft is caused by a rotational movement of a camshaft of the internal combustion engine.
  • the high-pressure pump has a transmission gear with a first and a second gear, wherein the gear ratio of the high-pressure pump gear ratio and the translation of the camshaft corresponds to the drive of the internal combustion engine.
  • the first gear is arranged on the camshaft, which transmits the drive from the internal combustion engine.
  • the camshaft is supported by at least one bearing.
  • the second gear is arranged on the pump shaft.
  • the transmission gear is arranged in a housing.
  • the housing of the transmission gear is flanged to the high-pressure pump.
  • the transmission gear can also be formed directly as a flange of the high-pressure pump.
  • the transmission gear is integrated as part of the high-pressure pump in a pump housing of the high-pressure pump.
  • the transmission gear is running in engine oil.
  • the transmission gear is operated with diesel.
  • the high-pressure pump is upstream of a prefeed pump, in particular a gear pump upstream.
  • the gear pump is an electric gear pump.
  • the gear pump may have a speed in the range of 10,000 to 20,000 1 / min. In a particularly preferred embodiment, the speed of the prefeed pump is 12 000 1 / min and the maximum speed of the mechanically driven high-pressure pump at 6 000 1 / min.
  • FIG. 1 shows a section through a high pressure pump according to an embodiment.
  • FIG. 2 shows a section through a section of a high-pressure pump according to a further embodiment
  • FIG. 3 shows a section through a section of a high-pressure pump according to yet another embodiment
  • Fig. 5 is a schematic representation of an arrangement of a high-pressure pump with upstream prefeed pump according to another embodiment.
  • FIG. 1 shows a section through a high-pressure pump 1 for a common-rail injection system.
  • the high-pressure pump 1 has a pump housing 2, in which a pump shaft 3 is arranged.
  • the pump shaft 3 is rotatably supported by the bearings 4 via two bearing points spaced apart from one another in the direction of the axis of rotation D of the pump shaft 3.
  • the pump shaft 3 In a region lying between the bearing points, the pump shaft 3 has a cam 5 or, alternatively, an eccentric to the rotation axis 4 formed section.
  • the high pressure pump 1 has at least one or more arranged in the pump housing 2 pump elements 6, each with a pump piston 7, which is driven by the cam 5 of the pump shaft 3 in a lifting movement in at least approximately radial direction to the axis of rotation 4 of the pump shaft 3.
  • the pump piston 7 is guided tightly displaceably in a cylinder bore 8 formed in a cylinder head 11 of the high-pressure pump 1 and delimited with its end face remote from the pump shaft 3 in the cylinder bore 8 a pump working chamber 9. Furthermore arranged in the pump housing are an inlet valve, not shown here which the fuel pump element 6 is supplied with fuel, and an outlet valve 10, which over a NEN outlet channel (not shown), for example, with a high-pressure accumulator (not shown) is connected. One or more injectors (not shown) arranged on cylinders of the internal combustion engine are connected to the high-pressure accumulator, through which fuel is injected into the cylinders of the internal combustion engine.
  • the pump working chamber 9 is filled with fuel by a fuel feed channel (not shown) with the inlet valve open, the outlet valve 10 being closed.
  • the delivery stroke of the pump piston 7, in which this moves radially outward is pumped by the pump piston 7 fuel at high pressure through the fuel drain channel (not shown) with open outlet valve 10 to the high-pressure accumulator, the inlet valve is closed.
  • a plunger assembly 12 is also arranged, via which the pump piston 7 is supported at least indirectly via a rotatably mounted roller 13 on the cam 5 of the pump shaft 3.
  • the embodiment shown in Fig. 1 further comprises shaft seals 15 to separate engine oil from the fuel.
  • a flange 14 is provided which simultaneously forms a housing 16 for a transmission gear in this embodiment.
  • the transmission gear comprises a first gear 17 and a second gear 18 which is engaged with the first gear 17.
  • the first gear is arranged on a separate shaft with bearings 20, namely on the camshaft 19 of the internal combustion engine and the second gear 18 is arranged on the pump shaft 3 of the high-pressure pump 1.
  • the difference in size between the first gear 17 and the second gear 18 represents the translation.
  • FIG. 2 shows a section through a section of a high-pressure pump 1 according to a further embodiment, which differs from that shown in FIG Embodiment only differs in that no separate bearings on both sides of the first gear 17 are provided on the camshaft 19.
  • Fig. 3 shows a section through a portion of a high pressure pump 1 according to yet another embodiment, wherein in this embodiment, the housing 16 of the transmission gear is provided separately from the flange 14 and the pump housing 2.
  • FIG. 4A and 4B each show a schematic representation of the arrangement possibilities of the transmission gear, wherein in Fig. 4A the arrangement already described in connection with FIG. 1 to 3 is shown, whereas in Fig. 4B, an arrangement is shown in which the transmission gear with respect arranged in a cylinder head 21 camshaft 9 is arranged reversed, so that the high pressure pump 1 is adjacent to the engine or the internal combustion engine.
  • FIG. 5 shows a schematic representation of an arrangement of a high-pressure pump 1 with an upstream prefeed pump 22, which supplies fuel from a fuel tank 23 to the high-pressure pump 1.
  • the prefeed pump 22 is designed as an electric gear pump and has a maximum speed of 12 000 1 / min, whereas the mechanically driven high-pressure pump 1 has a maximum rated speed of 6000 1 / min.
  • the prefeed pump 22 at twice the maximum speed as the high-pressure pump 1 a much higher maximum speed than this.

Landscapes

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

Abstract

L'invention concerne une pompe à haute pression (1) pour un système d'injection par accumulation de pression qui présente un arbre de pompe (3) dont le mouvement de rotation est converti par au moins une came (5) en un mouvement de levage d'au moins un piston de pompe (7) de la pompe à haute pression (1), le mouvement de rotation de l'arbre de pompe (3) étant provoqué par un mouvement de rotation d'un arbre à cames (19) d'un moteur à combustion interne, et la pompe à haute pression (1) présentant un engrenage multiplicateur avec une première roue dentée (17) et une seconde roue dentée (18), la multiplication par engrenage de la multiplication de la pompe à haute pression correspondant à la multiplication de l'arbre à cames (19) pour l'entraînement du moteur à combustion interne.
PCT/EP2010/070861 2010-01-22 2010-12-29 Pompe à haute pression WO2011088958A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010001119.3 2010-01-22
DE201010001119 DE102010001119A1 (de) 2010-01-22 2010-01-22 Hochdruckpumpe

Publications (1)

Publication Number Publication Date
WO2011088958A1 true WO2011088958A1 (fr) 2011-07-28

Family

ID=43629618

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/070861 WO2011088958A1 (fr) 2010-01-22 2010-12-29 Pompe à haute pression

Country Status (2)

Country Link
DE (1) DE102010001119A1 (fr)
WO (1) WO2011088958A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2536950A (en) * 2015-04-01 2016-10-05 Gm Global Tech Operations Llc Coupling assembly for coupling a camshaft-driven unit pump to a camshaft
EP3940224A1 (fr) * 2020-07-13 2022-01-19 Powerhouse Engine Solutions Switzerland IP Holding GmbH Système et procédé d'alimentation en huile pour pompe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0915252A2 (fr) * 1997-11-05 1999-05-12 SIG Schweizerische Industrie-Gesellschaft Système d'injection par alimentation commune des injecteurs
DE10107326A1 (de) * 2000-02-18 2001-08-23 Denso Corp Kraftstoffeinspritzpumpe
EP1253313A1 (fr) * 2000-01-31 2002-10-30 Bosch Automotive Systems Corporation Pompe d'injection
DE10322604A1 (de) 2003-05-20 2004-12-09 Robert Bosch Gmbh Satz von Kolbenpumpen, insbesondere Kraftstoffpumpen für Brennkraftmaschinen mit Kraftstoff-Direkteinspritzung
DE102005033634A1 (de) 2005-07-19 2007-01-25 Robert Bosch Gmbh Hochdruck-Kraftstoffpumpe für ein Kraftstoff-Einspritzsystem einer Brennkraftmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0915252A2 (fr) * 1997-11-05 1999-05-12 SIG Schweizerische Industrie-Gesellschaft Système d'injection par alimentation commune des injecteurs
EP1253313A1 (fr) * 2000-01-31 2002-10-30 Bosch Automotive Systems Corporation Pompe d'injection
DE10107326A1 (de) * 2000-02-18 2001-08-23 Denso Corp Kraftstoffeinspritzpumpe
DE10322604A1 (de) 2003-05-20 2004-12-09 Robert Bosch Gmbh Satz von Kolbenpumpen, insbesondere Kraftstoffpumpen für Brennkraftmaschinen mit Kraftstoff-Direkteinspritzung
DE102005033634A1 (de) 2005-07-19 2007-01-25 Robert Bosch Gmbh Hochdruck-Kraftstoffpumpe für ein Kraftstoff-Einspritzsystem einer Brennkraftmaschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2536950A (en) * 2015-04-01 2016-10-05 Gm Global Tech Operations Llc Coupling assembly for coupling a camshaft-driven unit pump to a camshaft
EP3940224A1 (fr) * 2020-07-13 2022-01-19 Powerhouse Engine Solutions Switzerland IP Holding GmbH Système et procédé d'alimentation en huile pour pompe
US11698050B2 (en) 2020-07-13 2023-07-11 Powerhouse Engine Solutions Switzerland IP Holding GmbH System and method for oil supply to pump

Also Published As

Publication number Publication date
DE102010001119A1 (de) 2011-07-28

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