US20080069712A1 - High-Pressure Pump for a Fuel Injection System of an Internal Combustion Engine - Google Patents

High-Pressure Pump for a Fuel Injection System of an Internal Combustion Engine Download PDF

Info

Publication number
US20080069712A1
US20080069712A1 US11/597,917 US59791706A US2008069712A1 US 20080069712 A1 US20080069712 A1 US 20080069712A1 US 59791706 A US59791706 A US 59791706A US 2008069712 A1 US2008069712 A1 US 2008069712A1
Authority
US
United States
Prior art keywords
pump
valve member
valve
piston
pump piston
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.)
Abandoned
Application number
US11/597,917
Other languages
English (en)
Inventor
Michael Mennicken
Andreas Kellner
Falko Bredow
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
Individual
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 Individual filed Critical Individual
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BREDOW, FALKO, KELLNER, ANDREAS, MENNICKEN, MICHAEL
Publication of US20080069712A1 publication Critical patent/US20080069712A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/125—Reciprocating valves
    • F04B53/129—Poppet valves
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F04B53/1022—Disc valves having means for guiding the closure member axially

Definitions

  • the invention is based on a high-pressure pump for a fuel injection system of an internal combustion engine as generically defined by the preamble to claim 1 .
  • This high-pressure pump has at least one pump element, with a pump piston which is driven in a reciprocating motion and is guided displaceably in a cylinder bore and in that bore defines a pump work chamber.
  • the pump work chamber can be filled with fuel via a suction valve.
  • the suction valve has a valve member, opening into the pump work chamber, that cooperates with a valve seat.
  • the pump piston in its end region toward the suction valve, has a blind bore into which the valve member of the suction valve plunges, and in which a closing spring acting on the valve member is disposed that is braced on one end on the pump piston and on the other on the valve member.
  • the valve member has a shaft, which is surrounded by the closing spring and with which the valve member is guided displaceably in the closing spring.
  • the outside diameter of the closing spring is only slightly smaller than the diameter of the blind bore in the pump piston, so that the closing spring is guided in the blind bore of the pump piston.
  • the high-pressure pump of the invention having the characteristics of claim 1 has the advantage over the prior art that the valve member of the suction valve is guided precisely in the pump piston, and as a result the function of the suction valve and hence of the high-pressure pump is improved.
  • the version shown in claim 3 makes a long guidance length of the valve member in the blind bore possible, while at the same time enabling a space-saving disposition of the closing spring.
  • the version according to claim 4 makes it possible to fill and evacuate the spring chamber during the motion of the valve member, and by suitable dimensioning of the at least one opening in the valve member, its opening and/or closing motion can be varied in a purposeful way.
  • the embodiment according to claim 5 makes very precise guidance of the valve member relative to the valve seat possible, since the cylinder bore for the pump piston and the valve seat can both be produced in the same piece of manufacturing equipment and can therefore be aligned very precisely to one another.
  • FIG. 1 shows a high-pressure pump for a fuel injection system of an internal combustion engine in a longitudinal section
  • FIG. 2 shows a detail, marked II in FIG. 1 , of the high-pressure pump with a suction valve in the open state;
  • FIG. 3 shows the detail II with the suction valve in the closed state.
  • FIGS. 1 through 3 a high-pressure pump for a fuel injection system of an internal combustion engine is shown.
  • the high-pressure pump has a pump housing 10 , in which a drive shaft 12 , which can be driven to rotate by the engine, is rotatably supported, for instance via two bearing points spaced apart from one another axially.
  • the drive shaft 12 has at least one portion that is eccentric to its pivot axis 13 , or cam 16 ; the cam 16 may also be embodied as a multiple cam.
  • the high-pressure pump has at least one, or more, pump elements 18 disposed in the pump housing 10 , each with a pump piston 20 that is driven in a reciprocating motion by the eccentric portion or the cam 16 of the drive shaft 12 , in a direction that is at least approximately radial to the pivot axis 13 of the drive shaft 12 .
  • the pump piston 20 is guided tightly displaceably in a cylinder bore 22 that is embodied in the pump housing 10 , and with its face end remote from the drive shaft 12 , the pump piston defines a pump work chamber 24 in the cylinder bore 22 .
  • the pump work chamber 24 Via a fuel delivery conduit 26 extending in the pump housing 10 , the pump work chamber 24 has a communication with a fuel delivery means, such as a feed pump 14 .
  • a suction valve 28 which opens into the pump work chamber 24 .
  • the pump work chamber 24 Via a fuel outflow conduit 30 extending in the pump housing 10 , the pump work chamber 24 also has a communication with an outlet, which for instance communicates with a high-pressure reservoir 110 .
  • One or preferably more injectors 120 disposed at the cylinders of the engine communicate with the high-pressure reservoir 110 , and through them fuel is injected into the cylinders of the engine.
  • At the mouth of the fuel outflow conduit 30 into the pump work chamber 24 there is an outlet valve 32 that opens out of the pump work chamber 24 .
  • a support element may be disposed, in the form of a tappet 34 , by way of which the pump piston 20 is braced at least indirectly on the cam 16 .
  • the pump piston 20 is coupled to the tappet 34 in a manner not shown in detail in the direction of its longitudinal axis 21 .
  • the tappet 34 may be braced directly on the eccentric portion or cam 16 .
  • the tappet 34 is displaceably supported in the pump housing 10 in a bore 36 and absorbs transverse forces that occur upon the conversion of the rotary motion of the drive shaft 12 into the reciprocating motion of the pump piston 20 , so that these forces do not act on the pump piston 20 .
  • the tappet 34 is engaged by a prestressed restoring spring 38 , by which the tappet 34 and the pump piston 20 connected to it are pressed toward the cam 16 .
  • the suction valve 28 will now be described in further detail, referring to FIGS. 2 and 3 .
  • the cylinder bore 22 of the pump housing 10 is adjoined, toward the outside of the pump housing 10 facing away from the drive shaft 12 , by a bore 40 in the pump housing 10 , which is at least approximately coaxial with the cylinder bore 22 and has a smaller diameter than the cylinder bore 22 .
  • a valve seat 42 is embodied, which is for instance at least approximately frustoconical.
  • the bore 40 discharges into the fuel delivery conduit 26 .
  • the suction valve 28 has a valve member 44 , which is disposed in the pump work chamber 24 and which cooperates with the valve seat 42 for controlling the communication of the pump work chamber 24 with the fuel delivery conduit 26 .
  • the valve member 44 is embodied as piston-like and cup-shaped, and the closed end of the valve member 44 is oriented toward the valve seat 42 .
  • the valve member 44 has a sealing face 45 , which is for instance at least approximately frustoconical, and with which it cooperates with the valve seat 42 .
  • the pump piston 20 in its end region oriented toward the valve seat 42 , has a blind bore 46 , which extends at least approximately coaxially with the longitudinal axis 21 of the pump piston and into which the valve member 44 of the suction valve 28 plunges with its open end.
  • the valve member 44 over a large portion of its length, is guided displaceably, with slight radial play, in the blind bore 46 in the pump piston 20 .
  • a spring chamber 48 is defined in the blind bore 46 ; a closing spring 50 of the suction valve 28 is disposed in this spring chamber, braced on one end on the bottom of the blind bore 46 on the pump piston 20 and on the other on the valve member 44 .
  • the closing spring 50 is embodied as a helical compression spring and protrudes into the valve member 44 and is braced in it on an annular shoulder formed by a reduction of the inside cross section of the valve member 44 . By means of the closing spring 50 , the valve member 44 is pressed toward the valve seat 42 .
  • At least one opening 52 is provided, through which the spring chamber 48 communicates with the pump work chamber 24 .
  • the at least one opening 52 makes it possible to fill and evacuate the spring chamber 48 upon a motion of the valve member 44 relative to the pump piston 20 , and by the dimensioning of the at least one opening 52 , the flow rate in the filling and evacuation of the spring chamber 48 can be varied.
  • valve member 44 is guided displaceably in the blind bore 46 with high precision coaxially with the valve seat 42 , since the cylinder bore 22 , in which the pump piston 20 is guided, and the valve seat 42 are embodied in the same pump housing 10 . As a result, upon closing, the valve member 44 , with its sealing face 45 , securely comes to rest on the valve seat 42 and thus reliably closes.
  • the outlet valve 38 is closed.
  • fuel in the pump work chamber 24 is compressed by the pump piston 20 , so that because of the increased pressure in the pump work chamber 24 , the suction valve 28 closes, while fuel at high pressure is pumped through the fuel outflow conduit 30 , with the outlet valve 32 open, to the high-pressure reservoir 110 .
  • the suction valve 28 is shown in the closed state, during a pumping stroke of the pump piston 20 .
  • valve seat 42 is embodied on some other part of the pump housing 10 than the cylinder bore 22 in which the pump piston 20 is guided. In that case, however, it must be assured that the part of the pump housing 10 on which the valve seat 42 is embodied is aligned very precisely relative to the part of the pump housing 10 in which the cylinder bore 22 is embodied, so as to achieve the requisite coaxial alignment of the valve seat 42 with the cylinder bore 22 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)
US11/597,917 2004-06-16 2005-04-20 High-Pressure Pump for a Fuel Injection System of an Internal Combustion Engine Abandoned US20080069712A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004028999A DE102004028999A1 (de) 2004-06-16 2004-06-16 Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
DE102004028999.9 2004-06-16
PCT/EP2005/051738 WO2005124153A1 (fr) 2004-06-16 2005-04-20 Pompe haute pression conçue pour un dispositif d'injection de carburant d'un moteur a combustion interne

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/093,251 Continuation US8696783B2 (en) 2004-02-17 2011-04-25 Filter unit

Publications (1)

Publication Number Publication Date
US20080069712A1 true US20080069712A1 (en) 2008-03-20

Family

ID=34967479

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/597,917 Abandoned US20080069712A1 (en) 2004-06-16 2005-04-20 High-Pressure Pump for a Fuel Injection System of an Internal Combustion Engine

Country Status (4)

Country Link
US (1) US20080069712A1 (fr)
JP (1) JP4589382B2 (fr)
DE (1) DE102004028999A1 (fr)
WO (1) WO2005124153A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102478015A (zh) * 2010-11-26 2012-05-30 日立汽车系统株式会社 水泵
US9193000B2 (en) 2010-06-28 2015-11-24 Robert Bosch Gmbh Metallic component for high-pressure applications
GB2555599A (en) * 2016-11-02 2018-05-09 Delphi Int Operations Luxembourg Sarl Fuel pump
CN109196215A (zh) * 2016-04-27 2019-01-11 德尔福知识产权有限公司 高压燃料泵
CN111794887A (zh) * 2019-04-08 2020-10-20 纬湃汽车电子(长春)有限公司 高压泵
US20220412297A1 (en) * 2019-11-22 2022-12-29 Cummins Lnc. Pump plunger assembly for improved pump efficiency

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009000835A1 (de) 2009-02-13 2010-08-19 Robert Bosch Gmbh Modulare Niederdruckeinheit und modulare Pumpenanordnung
DE102009000857A1 (de) 2009-02-13 2010-08-19 Robert Bosch Gmbh Pumpenanordnung
DE102009000943A1 (de) 2009-02-18 2010-08-19 Robert Bosch Gmbh Einrichtung zur Durchflussmengenbegrenzung an einer Pumpe und Pumpenanordnung mit solch einer Einrichtung
DE102009003057A1 (de) 2009-05-13 2010-11-18 Robert Bosch Gmbh Steckpumpe

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2404983A (en) * 1943-07-12 1946-07-30 Pengilly Lewis Liquid fuel pump
US2555930A (en) * 1948-05-17 1951-06-05 Palumbo Giuseppe Fuel injection pump for internal-combustion engines
US3740172A (en) * 1971-06-01 1973-06-19 Borg Warner Reciprocating fuel pumps
US4431381A (en) * 1981-11-27 1984-02-14 J. I. Case Company Variable volume hydraulic pump
US4561828A (en) * 1982-05-19 1985-12-31 Speck-Kolbenpumpen-Fabrik Otto Speck Kg Pump for forwarding liquids
US4746339A (en) * 1984-08-06 1988-05-24 Tilghman Wheelabrator Limited Filtering apparatus
US4923373A (en) * 1987-04-01 1990-05-08 Flutec Fluidtechnische Gerate Gmbh Hydraulic single piston pump for manual operation
US5540570A (en) * 1993-08-31 1996-07-30 Robert Bosch Gmbh Reciprocating piston pump with a housing block and at least one reciprocating piston pump element
US5562428A (en) * 1995-04-07 1996-10-08 Outboard Marine Corporation Fuel injection pump having an adjustable inlet poppet valve
US5738142A (en) * 1996-08-09 1998-04-14 Case Corporation Pressure holding directional control valve
US5788469A (en) * 1996-12-13 1998-08-04 Chrysler Corporation Piston type liquid fuel pump with an improved outlet valve
US5954487A (en) * 1995-06-23 1999-09-21 Diesel Technology Company Fuel pump control valve assembly
US5984651A (en) * 1993-07-23 1999-11-16 Itt Automotive Europe, Gmbh Hydraulic brake system
US6110243A (en) * 1996-07-11 2000-08-29 Gore Enterprise Holdings, Inc. Cleanable filter bag assembly
US20010042361A1 (en) * 2000-02-15 2001-11-22 Cox Stephen T. Melt blown composite HEPA filter media and vacuum bag
US6457957B1 (en) * 1998-10-17 2002-10-01 Bosch Gmbh Robert Radial piston pump for generating high fuel pressure
US6558142B2 (en) * 1999-11-30 2003-05-06 Robert Bosch Gmbh High-pressure hydraulic fuel pump
US6640788B2 (en) * 2001-02-28 2003-11-04 Denso Corporation High pressure fuel pump
US6764286B2 (en) * 2001-10-29 2004-07-20 Kelsey-Hayes Company Piston pump with pump inlet check valve
US6837694B2 (en) * 2001-06-27 2005-01-04 Unisia Jecs Corporation Hydraulic pump unit with orifice plate for vehicle brake control system
US6959694B2 (en) * 2002-04-23 2005-11-01 Robert Bosch Gmbh Fuel injection system for an internal combustion engine
US7210463B2 (en) * 2002-08-29 2007-05-01 Robert Bosch Gmbh Pump, especially for a fuel injection device for an internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0287965U (fr) * 1988-12-26 1990-07-12
DE19822671A1 (de) * 1998-05-20 1999-11-25 Bosch Gmbh Robert Druckbegrenzungsventil

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2404983A (en) * 1943-07-12 1946-07-30 Pengilly Lewis Liquid fuel pump
US2555930A (en) * 1948-05-17 1951-06-05 Palumbo Giuseppe Fuel injection pump for internal-combustion engines
US3740172A (en) * 1971-06-01 1973-06-19 Borg Warner Reciprocating fuel pumps
US4431381A (en) * 1981-11-27 1984-02-14 J. I. Case Company Variable volume hydraulic pump
US4561828A (en) * 1982-05-19 1985-12-31 Speck-Kolbenpumpen-Fabrik Otto Speck Kg Pump for forwarding liquids
US4746339A (en) * 1984-08-06 1988-05-24 Tilghman Wheelabrator Limited Filtering apparatus
US4923373A (en) * 1987-04-01 1990-05-08 Flutec Fluidtechnische Gerate Gmbh Hydraulic single piston pump for manual operation
US5984651A (en) * 1993-07-23 1999-11-16 Itt Automotive Europe, Gmbh Hydraulic brake system
US5540570A (en) * 1993-08-31 1996-07-30 Robert Bosch Gmbh Reciprocating piston pump with a housing block and at least one reciprocating piston pump element
US5562428A (en) * 1995-04-07 1996-10-08 Outboard Marine Corporation Fuel injection pump having an adjustable inlet poppet valve
US5954487A (en) * 1995-06-23 1999-09-21 Diesel Technology Company Fuel pump control valve assembly
US6110243A (en) * 1996-07-11 2000-08-29 Gore Enterprise Holdings, Inc. Cleanable filter bag assembly
US5738142A (en) * 1996-08-09 1998-04-14 Case Corporation Pressure holding directional control valve
US5788469A (en) * 1996-12-13 1998-08-04 Chrysler Corporation Piston type liquid fuel pump with an improved outlet valve
US6457957B1 (en) * 1998-10-17 2002-10-01 Bosch Gmbh Robert Radial piston pump for generating high fuel pressure
US6558142B2 (en) * 1999-11-30 2003-05-06 Robert Bosch Gmbh High-pressure hydraulic fuel pump
US20010042361A1 (en) * 2000-02-15 2001-11-22 Cox Stephen T. Melt blown composite HEPA filter media and vacuum bag
US6640788B2 (en) * 2001-02-28 2003-11-04 Denso Corporation High pressure fuel pump
US6837694B2 (en) * 2001-06-27 2005-01-04 Unisia Jecs Corporation Hydraulic pump unit with orifice plate for vehicle brake control system
US6764286B2 (en) * 2001-10-29 2004-07-20 Kelsey-Hayes Company Piston pump with pump inlet check valve
US6959694B2 (en) * 2002-04-23 2005-11-01 Robert Bosch Gmbh Fuel injection system for an internal combustion engine
US7210463B2 (en) * 2002-08-29 2007-05-01 Robert Bosch Gmbh Pump, especially for a fuel injection device for an internal combustion engine

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9193000B2 (en) 2010-06-28 2015-11-24 Robert Bosch Gmbh Metallic component for high-pressure applications
CN102478015A (zh) * 2010-11-26 2012-05-30 日立汽车系统株式会社 水泵
US20120134789A1 (en) * 2010-11-26 2012-05-31 Hitachi Automotive Systems, Ltd. Water Pump
CN109196215A (zh) * 2016-04-27 2019-01-11 德尔福知识产权有限公司 高压燃料泵
US20190113032A1 (en) * 2016-04-27 2019-04-18 Delphi Technologies Ip Limited High pressure fuel pump
US10830220B2 (en) * 2016-04-27 2020-11-10 Delphi Technologies Ip Limited High pressure fuel pump
EP3449116B1 (fr) * 2016-04-27 2021-04-07 Delphi Technologies IP Limited Pompe à carburant haute pression
GB2555599A (en) * 2016-11-02 2018-05-09 Delphi Int Operations Luxembourg Sarl Fuel pump
CN111794887A (zh) * 2019-04-08 2020-10-20 纬湃汽车电子(长春)有限公司 高压泵
US20220412297A1 (en) * 2019-11-22 2022-12-29 Cummins Lnc. Pump plunger assembly for improved pump efficiency
US11719207B2 (en) * 2019-11-22 2023-08-08 Cummins Inc. Pump plunger assembly for improved pump efficiency

Also Published As

Publication number Publication date
WO2005124153A1 (fr) 2005-12-29
DE102004028999A1 (de) 2006-01-05
JP4589382B2 (ja) 2010-12-01
JP2008502838A (ja) 2008-01-31

Similar Documents

Publication Publication Date Title
US20080069712A1 (en) High-Pressure Pump for a Fuel Injection System of an Internal Combustion Engine
US7363913B2 (en) High-pressure pump for a fuel injection system of an internal combustion engine
JP4681119B2 (ja) 燃料高圧発生用のラジアルピストンポンプ
US7780144B2 (en) Valve, in particular for a high-pressure pump of a fuel injection system for an internal combustion engine
US8820300B2 (en) High pressure fuel supply pump
US6568927B1 (en) Piston pump for high-pressure fuel generation
US6892955B2 (en) Fuel injection device for an internal combustion engine
US7571713B2 (en) High-pressure pump for a fuel injection system of an internal combustion engine
US7273036B2 (en) High-pressure fuel pump with a ball valve in the low-pressure inlet
US7775190B2 (en) Radial piston pump for supplying fuel at high pressure to an internal combustion engine
EP1098087B1 (fr) Injecteur de combustible
US20230096056A1 (en) High-Pressure Fuel Pump
US20060193736A1 (en) Fuel injection device for an internal combustion engine
US6845757B2 (en) Fuel injection system for an internal combustion engine
US20070221162A1 (en) High-Pressure Pump for a Fuel Injection System of an Internal Combustion Engine
US6530556B1 (en) Control unit for controlling a pressure build-up in a pump unit
JP4787444B2 (ja) ラジアルピストンポンプ
KR102268857B1 (ko) 연료 펌프
JPS6146459A (ja) 内燃機関用の燃料噴射ポンプ
US6912990B2 (en) Fuel injection system for an internal combustion engine
US20230007936A1 (en) Injector apparatus
SU1240946A1 (ru) Топливный насос
US20040046061A1 (en) Fuel injection device for internal combustion engines
US20040188536A1 (en) Fuel injection system for direct injection internal combustion engine
JP2003106242A (ja) 内燃機関のための燃料噴射装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MENNICKEN, MICHAEL;KELLNER, ANDREAS;BREDOW, FALKO;REEL/FRAME:019634/0639

Effective date: 20060524

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION