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WO2009115354A1 - Pompe haute pression - Google Patents

Pompe haute pression Download PDF

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Publication number
WO2009115354A1
WO2009115354A1 PCT/EP2009/050683 EP2009050683W WO2009115354A1 WO 2009115354 A1 WO2009115354 A1 WO 2009115354A1 EP 2009050683 W EP2009050683 W EP 2009050683W WO 2009115354 A1 WO2009115354 A1 WO 2009115354A1
Authority
WO
WIPO (PCT)
Prior art keywords
internal combustion
drive shaft
combustion engine
pressure pump
pump
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.)
Ceased
Application number
PCT/EP2009/050683
Other languages
German (de)
English (en)
Inventor
Friedrich Boecking
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.)
Robert Bosch GmbH
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 WO2009115354A1 publication Critical patent/WO2009115354A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/002—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for driven by internal combustion engines
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed

Definitions

  • the invention relates to a high-pressure pump for an internal combustion engine, in particular a fuel pump for fuel injection systems of air-compressing, self-igniting internal combustion engines.
  • a high-pressure pump for a fuel injection device of an internal combustion engine has a pump housing in which three pump elements are arranged, which are distributed uniformly over a circumference with respect to an axis of a drive shaft.
  • fuel is conveyed by the pump elements under high pressure via a high-pressure channel system to a common high-pressure connection.
  • the pump housing has a housing body and, for each pump element, a housing cover which covers this and is connected to the housing body.
  • the known from DE 102 47 142 Al high-pressure pump has the disadvantage that the design of the pump housing is complex, since three holes to be sealed are provided for the pump elements, the high-pressure channel system is complex and differently designed housing cover for the individual pump elements are required. Furthermore, three pump elements and thus a high number of components are needed. The preparation of the known high pressure pump therefore requires a lot of effort.
  • the high-pressure pump according to the invention with the features of claim 1 and the fuel injection system according to the invention with the features of claim 5 have the advantage that a structure of the high-pressure pump simplified and thus the production costs are reduced. In particular, a very high efficiency can be achieved with a simple structure.
  • a transmission factor of the rotational speed of the drive shaft with respect to the crankshaft speed of the internal combustion engine is approximately equal to 2. This can be achieved, for example, that the drive shaft of the high pressure pump is attached directly to a balance shaft of the crankshaft of the internal combustion engine.
  • a translation unit is provided, which is connected on the one hand with a shaft of the internal combustion engine and on the other hand connected to the drive shaft of the high pressure pump and that the translation unit dictates a translation factor of the crankshaft to the drive shaft of greater than 1.
  • a ratio with a ratio factor of 1.5 or 2 for an internal combustion engine with four cylinders or of 4/3 or 8/3 for an internal combustion engine with three cylinders is specified.
  • FIG. 1 shows a high pressure pump in an excerpted sectional view according to a first embodiment of the invention.
  • Fig. 2 is a fuel injection system with a high-pressure pump and a
  • Fig. 3 is a fuel injection system with a high-pressure pump and a
  • Fig. 1 shows a high pressure pump 1 in an excerpted sectional view according to a first embodiment of the invention.
  • An axis 2 of a drive shaft 3 is oriented perpendicular to the cutting plane.
  • the high-pressure pump 1 is used for an internal combustion engine and can serve in particular as a fuel pump for fuel injection systems of air-compressing, self-igniting internal combustion engines.
  • a preferred use of the high-pressure pump 1 is for a fuel injection system with a fuel distributor strip 4 (FIG. 2), a so-called common rail, which stores diesel fuel under high pressure.
  • the high-pressure pump 1 according to the invention is also suitable for other applications.
  • the high-pressure pump 1 has a multi-part housing 5, which comprises a main body 6 and a cylinder head 7.
  • the drive shaft 3 is mounted in a suitable manner.
  • the drive shaft 3 has exactly one cam 8, which is associated with a pump assembly 9.
  • the pump assembly 9 is inserted into a bore 10 in the base body 6 of the housing 5.
  • the high-pressure pump 1 preferably has exactly one pump subassembly 9, so that the number of required components is optimized.
  • the cylinder head 7 of the housing 5 of the high-pressure pump 1 has a projection 11 which extends into the bore 10 of the main body 6.
  • a eccentric cylinder bore 12 is provided, in which a piston 13 of the pump assembly 9 is guided.
  • the piston 13 is displaceably mounted in a radial direction along a radial axis 14, which is oriented perpendicular to the axis 2.
  • the piston 13 defines a pump working chamber 15 of the cylinder bore 12.
  • the housing 5 serving as a low-pressure inlet fuel passage 16, 16 ' is provided, which leads in sections through the base body 6 and partially through the cylinder head 7. Fuel can pass from the fuel channel 16, 16 'into the pump working chamber 15 via an inlet valve 17. Furthermore, an outlet valve 18 is provided, via which fuel can be conveyed from the pump working chamber 15 to a high-pressure connection 19 of the high-pressure pump 1.
  • the piston 13 of the pump assembly 9 has a collar 20 which bears against a roller shoe 21 of the pump assembly 9.
  • the roller shoe 21 receives a roller 22 which, during operation of the high-pressure pump 1, runs along a running surface 23 of the cam 8.
  • the pump assembly 9 also has a hollow cylindrical plunger body 24 which is guided in the bore 10 of the base body 6.
  • the plunger body 24 has an internal projection 25 on which a driving plate 26 abuts.
  • a spring element 27 acts on the driving plate 26 against the projection 25, wherein the driving plate 26 also bears against the collar 20 of the piston 13 to hold the piston 13 at its collar 20 on the roller shoe 21.
  • Fig. 2 shows a fuel injection system 30 and an internal combustion engine 31.
  • the fuel injection system 30 has the high-pressure pump 1 shown in Fig. 1 and is configured according to a first embodiment.
  • the fuel injection system 30 has a prefeed pump 32 designed as a low-pressure pump, which conveys fuel from a tank 33 via a fuel line 16 "into the fuel channel 16, 16 'of the high-pressure pump 1.
  • the high-pressure port 19 of the high-pressure pump 1 is connected to the fuel distributor strip 4 via a high-pressure line 34
  • the high pressure pump 1 delivers high pressure fuel through the high pressure line 34 to the fuel rail 4, which stores the high pressure fuel.
  • the fuel distributor strip 4 is connected to fuel injection valves 36 via a plurality of high-pressure lines 35, wherein only the high-pressure line 35 and the fuel injection valve 36 are identified in FIG. 2 for the sake of simplicity of illustration.
  • the fuel injection valves 36 are inserted in the assembled state in bores of the internal combustion engine 31.
  • the internal combustion engine 31 has four cylinders, so that the high-pressure distributor rail 4 is connected to four fuel injection valves 36.
  • the internal combustion engine 31 has a crankshaft designed as a shaft 37, which rotates in operation at a crankshaft speed U ⁇ . Furthermore, a translation unit 38 is provided, which is connected on the one hand with the crankshaft 37 and on the other hand with the drive shaft 3. The translation unit 38 ensures a translation of the rotational speed U ⁇ of the crankshaft 37 to a rotational speed U A of the drive shaft 3 with a ratio factor i greater than 1 and less than or equal to 2. Specifically, a ratio factor i of 1.5 or 2 for the internal combustion engine 31 be selected with four cylinders. If, for example, a ratio factor i of 2 is selected, then the rotational speed U A of the drive shaft 3 is twice the crankshaft speed U K of the crankshaft 37. However, other transmission factors may also be selected. For example, for an internal combustion engine 31 with three cylinders, a ratio of greater than 2 may also be selected, as described with reference to FIG.
  • the high-pressure pump 1 can also be connected to the internal combustion engine 31 in a different manner.
  • the drive shaft 3 directly with a balancing shaft designed shaft 37 of the internal combustion engine 31, which is already translated with respect to the crankshaft, for example, with a ratio factor of 2 i.
  • Fig. 3 shows a fuel injection system 30 and an internal combustion engine 31 according to a second embodiment of the invention.
  • the drive unit 40 thus represents a separate drive which serves to drive the high-pressure pump 1 via the drive shaft 3.
  • the drive unit 40 may be configured, for example, as an electric motor.
  • a speed determination of the crankshaft speed U ⁇ of the crankshaft 37 of the internal combustion engine 31 by means of a sensor 41, a speed determination of the crankshaft speed U ⁇ of the crankshaft 37 of the internal combustion engine 31.
  • the determined by the sensor 41 crankshaft speed U ⁇ and a predetermined ratio factor i represent inputs to the drive unit 40, which is based on the translation factor i and the crankshaft speed U ⁇ the drive shaft 3 at a certain speed U A drives.
  • the drive unit 40 can determine the rotational speed U A of the drive shaft 3 as a product of the transmission factor i and the crankshaft speed U K :
  • the internal combustion engine 31 is configured with three cylinders. Accordingly, three fuel injection valves 36 are provided, which are connected to the fuel rail 4. In this case, a ratio factor i of 4/3, that is approximately 1.33, or 8/3, that is approximately 2.67, is advantageous.

Landscapes

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

Abstract

L'invention concerne une pompe haute pression (1) pour un moteur à combustion interne (31), réalisée en particulier en tant que pompe à carburant pour des systèmes d'injection de carburant de moteurs à combustion interne à autoallumage par compression. La pompe haute pression (1) comprend un module de pompe (9) et un arbre d'entraînement (3), l'arbre d'entraînement (3) comportant une came (8) associée au module de pompe (9). Selon l'invention, l'arbre d'entraînement (3) est entraîné à une vitesse de rotation (UA) supérieure à une vitesse de rotation (U?) d'un vilebrequin (37) du moteur à combustion interne (31).
PCT/EP2009/050683 2008-03-17 2009-01-22 Pompe haute pression Ceased WO2009115354A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008000711.0 2008-03-17
DE200810000711 DE102008000711A1 (de) 2008-03-17 2008-03-17 Hochdruckpumpe

Publications (1)

Publication Number Publication Date
WO2009115354A1 true WO2009115354A1 (fr) 2009-09-24

Family

ID=40548018

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/050683 Ceased WO2009115354A1 (fr) 2008-03-17 2009-01-22 Pompe haute pression

Country Status (2)

Country Link
DE (1) DE102008000711A1 (fr)
WO (1) WO2009115354A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010016357A1 (de) 2010-04-07 2011-10-13 A. T. Süd GmbH Verbrennungskraftmaschine mit Kraftstoffpumpe
DE102010016356A1 (de) 2010-04-07 2011-10-13 A. T. Süd GmbH Verbrennungskraftmaschine mit Kraftstoffpumpe
DE102012215778A1 (de) * 2012-09-06 2014-03-06 Robert Bosch Gmbh Brennkraftmaschine mit einem Kurbelgehäuse
ITUA20163270A1 (it) * 2016-05-09 2017-11-09 Bosch Gmbh Robert Gruppo di pompaggio e metodo per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669081A (en) * 1969-05-23 1972-06-13 Sopromi Soc Proc Modern Inject Electronically controlled injecting arrangements feeding fuel under constant pressure into internal combustion engines
US20020117155A1 (en) * 2001-02-23 2002-08-29 Toyota Jidosha Kabushiki Kaisha Fuel pump for an internal combustion engine
DE10306857A1 (de) * 2003-02-19 2004-09-02 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
US20060021598A1 (en) * 2004-07-30 2006-02-02 Toyota Jidosha Kabushiki Kaisha Control device of high-pressure fuel system of internal combustion engine
WO2007097052A1 (fr) * 2006-02-24 2007-08-30 Bosch Corporation Systeme d'injection de carburant pour moteur a combustion interne
EP1892410A1 (fr) * 2005-06-08 2008-02-27 Bosch Corporation Pompe d'alimentation en carburant et structure de poussoir

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10247142A1 (de) 2002-10-09 2004-04-22 Robert Bosch Gmbh Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669081A (en) * 1969-05-23 1972-06-13 Sopromi Soc Proc Modern Inject Electronically controlled injecting arrangements feeding fuel under constant pressure into internal combustion engines
US20020117155A1 (en) * 2001-02-23 2002-08-29 Toyota Jidosha Kabushiki Kaisha Fuel pump for an internal combustion engine
DE10306857A1 (de) * 2003-02-19 2004-09-02 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
US20060021598A1 (en) * 2004-07-30 2006-02-02 Toyota Jidosha Kabushiki Kaisha Control device of high-pressure fuel system of internal combustion engine
EP1892410A1 (fr) * 2005-06-08 2008-02-27 Bosch Corporation Pompe d'alimentation en carburant et structure de poussoir
WO2007097052A1 (fr) * 2006-02-24 2007-08-30 Bosch Corporation Systeme d'injection de carburant pour moteur a combustion interne

Also Published As

Publication number Publication date
DE102008000711A1 (de) 2009-09-24

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