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 PDFInfo
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 title claims description 5
- 238000002347 injection Methods 0.000 title claims description 5
- 239000007924 injection Substances 0.000 title claims description 5
- 238000007789 sealing Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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)
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 (de) | 2004-06-16 | 2005-04-20 | Hochdruckpumpe für eine kraftstoffeinspritzeinrichtung einer brennkraftmaschine |
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 (de) |
JP (1) | JP4589382B2 (de) |
DE (1) | DE102004028999A1 (de) |
WO (1) | WO2005124153A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102478015A (zh) * | 2010-11-26 | 2012-05-30 | 日立汽车***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)
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0287965U (de) * | 1988-12-26 | 1990-07-12 | ||
DE19822671A1 (de) * | 1998-05-20 | 1999-11-25 | Bosch Gmbh Robert | Druckbegrenzungsventil |
-
2004
- 2004-06-16 DE DE102004028999A patent/DE102004028999A1/de not_active Withdrawn
-
2005
- 2005-04-20 JP JP2007515913A patent/JP4589382B2/ja not_active Expired - Fee Related
- 2005-04-20 US US11/597,917 patent/US20080069712A1/en not_active Abandoned
- 2005-04-20 WO PCT/EP2005/051738 patent/WO2005124153A1/de active Application Filing
Patent Citations (22)
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)
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***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 (de) * | 2016-04-27 | 2021-04-07 | Delphi Technologies IP Limited | Hochdruckkraftstoffpumpe |
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 |
---|---|
JP4589382B2 (ja) | 2010-12-01 |
DE102004028999A1 (de) | 2006-01-05 |
JP2008502838A (ja) | 2008-01-31 |
WO2005124153A1 (de) | 2005-12-29 |
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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 |