EP2288804A1 - Kraftstoffhochdruckpumpe - Google Patents
KraftstoffhochdruckpumpeInfo
- Publication number
- EP2288804A1 EP2288804A1 EP09749669A EP09749669A EP2288804A1 EP 2288804 A1 EP2288804 A1 EP 2288804A1 EP 09749669 A EP09749669 A EP 09749669A EP 09749669 A EP09749669 A EP 09749669A EP 2288804 A1 EP2288804 A1 EP 2288804A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure fuel
- fuel pump
- roller
- pump according
- contact
- 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.)
- Granted
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
- 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
-
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0408—Pistons
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0439—Supporting or guiding means for the pistons
Definitions
- the invention relates to a high-pressure fuel pump for a fuel injection system of an internal combustion engine, comprising a pump housing and having at least one pump element, which comprises a piston which is driven by a cam, which cooperates with a roller which at its end of two Side contact surfaces is limited, which come into contact with mating surfaces during operation of the high-pressure fuel pump.
- the mating surfaces may, for example, be provided on a tappet body and limit movement of the roller in the axial direction.
- the object of the invention is to provide a high-pressure fuel pump according to the preamble of claim 1, which is inexpensive to produce and has a long service life.
- the object is with a high-pressure fuel pump for a fuel injection system of an internal combustion engine, with a pump housing and with at least one pump element which comprises a piston, which is driven by a cam which cooperates with a roller which is bounded at its ends by two soanlauf vom, which come into contact with counter surfaces in the operation of the high-pressure fuel pump, achieved in that the soanlauf vom designed as a circular disc surfaces and in a central inner region of the contact are released with the mating surfaces.
- a preferred embodiment of the high-pressure fuel pump is characterized in that the annular disc surfaces are exposed in a coaxial outer region from contact with the mating surfaces. Due to the targeted exemptions caused during operation of the high-pressure fuel pump by side starting of the roller at the associated mating surfaces friction wear can be significantly reduced.
- annular disk surface a surface is referred to, which is bounded by two concentric or coaxial circles. The annular surface can be made flat or curved.
- a further preferred embodiment of the high-pressure fuel pump is characterized in that the annular disk surfaces, viewed in longitudinal section through the roller, are each convexly curved.
- the radius of curvature is also called the tip radius in conventional rollers.
- the conventional dome shape is changed by the exemptions.
- the convexly curved annular disk surfaces have the shape of spherical zones. As a spherical zone, the spherical surface belonging to de part of a spherical layer, which results when a ball is cut from two parallel planes.
- a further preferred embodiment of the high-pressure fuel pump is characterized in that the central inner regions each comprise a flat which is arranged perpendicular to the longitudinal axis of the roller.
- the flats essentially have the shape of circular disks.
- a further preferred embodiment of the high-pressure fuel pump is characterized in that the central inner regions each comprise a depression.
- the recesses reliably prevent the central inner areas from coming into contact with the associated mating surfaces.
- a further preferred embodiment of the high-pressure fuel pump is characterized in that the annular disk surfaces are raised relative to the associated coaxial outer regions. The elevation or elevation reliably prevents the coaxial outer areas from coming into contact with the associated opposing surfaces.
- a further preferred embodiment of the high-pressure fuel pump is characterized in that the coaxial outer regions, viewed in longitudinal section through the roller, taper in the shape of a truncated cone.
- the cone angle is preferably selected so that the coaxial outer regions fall steeper outwards than the annular disk surfaces.
- Further preferred embodiments of the high-pressure fuel pump are characterized in that the transitions between the central inner regions and the associated Kreisringinnflä- surfaces, between the annular disc surfaces and the associated coaxial outer regions and between the coaxial outer regions and a cylinder body of the roller are rounded. The curves create gentle transitions.
- Figure 1 shows a detail of a high-pressure fuel pump according to an embodiment in longitudinal section through a pump element
- Figure 2 shows an enlarged detail II with a roller of Figure 1;
- Figure 3 shows the roller of Figure 2 alone in plan view
- Figure 4 shows an enlarged detail IV of Figure 3 in longitudinal section according to a first embodiment and Figure 5 shows the same section as in Figure 4 according to a second embodiment.
- FIGS. 1 and 2 show a section of a high-pressure fuel pump 1 with a pump housing 2 in longitudinal section through a pump element 3.
- the high-pressure fuel pump 1 is part of a fuel injection system of a motor vehicle and serves to pressurize fuel, which is preferably conveyed by means of a prefeed pump from a fuel tank to the high-pressure fuel pump 1, with high pressure.
- the high-pressure fuel is then supplied to a central high-pressure fuel storage, which is also referred to as common rail.
- Each pump element 3 comprises an element bore 4, in which an element body 6 protrudes, which emanates from a (not shown) cylinder head.
- a high-pressure piston 8 is guided back and forth movable.
- the high-pressure piston 8 essentially has the shape of a straight circular cylinder with a longitudinal axis 9.
- a double arrow 10 indicates that the high-pressure piston 8 is guided in the element body 6 so as to be movable back and forth along the longitudinal axis 9.
- One end of the high pressure piston 8 defines a pressure chamber in the cylinder head.
- the pressure chamber is connected via a suction valve with the pre-feed pump.
- the pressure chamber communicates via a pressure valve with the central high-pressure fuel accumulator.
- the piston 8 At its end facing away from the pressure chamber, the piston 8 has a piston foot 12, which essentially has the shape of a circular disk and is integrally connected to the piston 8.
- the piston 8 facing away from the end face of the piston foot 12 abuts against a roller shoe 14, in which a roller 15 is rotatably guided about its longitudinal axis 16.
- the longitudinal axis 16 of the roller 15 extends transversely to the longitudinal axis 9 of the piston 8.
- the roller 15 cooperates with a cam 18 of a drive shaft 20 through which the piston 8 is driven.
- the drive shaft 20 is rotatable about a rotation axis 21.
- a plunger 22 is received in the direction of the longitudinal axis 9 of the piston 8 movable back and forth.
- the plunger 22 essentially has the shape of a hollow circular cylinder and, radially inward, has a web 24 with which the plunger 22 is supported on the roller shoe 14.
- On the roller shoe 14 facing away from the upper side of the web 24 is a spring plate 25 which a central through hole through which the piston 8 extends therethrough.
- the piston base 12 of the piston 8 is arranged in the axial direction between the spring plate 25 and the roller shoe 18.
- a return spring 26 for the piston 8 is clamped between the spring plate 25 and the cylinder head.
- the biasing force of the return spring 26 of the piston 12 is held in contact with the roller shoe 14 and the roller shoe 14 in contact with the roller 15 and the roller 15 in abutment against the cam 18 of the drive shaft 20.
- An arrow 28 indicates that the drive shaft 20 rotates about the rotation axis 21 with the cam 18 during operation of the high-pressure fuel pump 1.
- roller 15 is shown alone in the plan view.
- the roller 15 has substantially the shape of a straight circular cylinder with dome-like elevations at their ends 31, 32.
- the roller 15 is used in the high-pressure fuel pump as a transmission member for converting a rotational movement of the drive shaft, in particular a camshaft in an oscillating motion.
- the ends 31, 32 of the roller 15 are geometrically optimized for reducing wear and increasing the service life of the components.
- FIG. 4 shows a section IV from FIG. 3 enlarged in a longitudinal section.
- the side contact surface of the roller 15 is designed as a circular disk surface 40.
- the annular disk surface 40 has the shape of a spherical zone and is convexly curved.
- the annular disk surface 40 may also have the shape of a truncated cone portion.
- the annular disk surface 40 extends around the longitudinal axis 16 of the roller 15.
- the annular disk surface 40 has an inner diameter 41 and radially outside an outer diameter 42.
- the area within the inner diameter 41 is flat as a flat 44.
- Radially outside the outer diameter 42 extends a coaxial outer region 46, which has the shape of a truncated cone portion.
- the caster is within the inner diameter
- a coaxial outer region 56 extending radially outwardly of the outer diameter 42 is offset from the annular disk surface 40 such that the annular disk surface 40 is raised or raised relative to the coaxial outer region.
- the height of the increase is also designated 55.
- the dimensioning of the dimensions 41; 51, 42; 52 and 55 are performed depending on the operating boundary conditions.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL09749669T PL2288804T3 (pl) | 2008-05-20 | 2009-03-20 | Wysokociśnieniowa pompa paliwowa |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008001871A DE102008001871A1 (de) | 2008-05-20 | 2008-05-20 | Kraftstoffhochdruckpumpe |
PCT/EP2009/053304 WO2009141179A1 (de) | 2008-05-20 | 2009-03-20 | Kraftstoffhochdruckpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2288804A1 true EP2288804A1 (de) | 2011-03-02 |
EP2288804B1 EP2288804B1 (de) | 2012-05-23 |
Family
ID=40756813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09749669A Not-in-force EP2288804B1 (de) | 2008-05-20 | 2009-03-20 | Kraftstoffhochdruckpumpe |
Country Status (9)
Country | Link |
---|---|
US (1) | US20110073078A1 (de) |
EP (1) | EP2288804B1 (de) |
JP (1) | JP5200162B2 (de) |
KR (1) | KR20110006689A (de) |
CN (1) | CN102037235A (de) |
DE (1) | DE102008001871A1 (de) |
PL (1) | PL2288804T3 (de) |
RU (1) | RU2010152004A (de) |
WO (1) | WO2009141179A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010038468A1 (de) * | 2010-07-27 | 2012-02-02 | Robert Bosch Gmbh | Hochdruckpumpe |
DE102010042472A1 (de) * | 2010-10-14 | 2012-04-19 | Robert Bosch Gmbh | Hochdruckpumpe eines Kraftstoffeinspritzsystems einer Brennkraftmaschine |
US9392836B2 (en) | 2011-08-04 | 2016-07-19 | Nike, Inc. | Footwear with interchangeable bootie system |
US20130084198A1 (en) * | 2011-10-04 | 2013-04-04 | Woodward, Inc. | Pump with centralized spring forces |
KR101349642B1 (ko) * | 2012-04-19 | 2014-01-10 | (주)모토닉 | 내연기관의 고압펌프 |
JP2014141957A (ja) * | 2012-12-28 | 2014-08-07 | Mitsubishi Heavy Ind Ltd | ラジアルピストン式油圧機械および風力発電装置 |
DE102013218260A1 (de) | 2013-09-12 | 2015-03-12 | Continental Automotive Gmbh | Rollenstößel |
JP2016003566A (ja) * | 2014-06-13 | 2016-01-12 | 三菱重工業株式会社 | ラジアルピストン式油圧機械及び風力発電装置 |
DE102017205238A1 (de) * | 2017-03-28 | 2018-10-04 | Robert Bosch Gmbh | Anlaufpilz, sowie elektrische Maschine aufweisend einen solchen |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4885952A (en) * | 1983-10-25 | 1989-12-12 | Connell Calvin C | Cylindrical tappet |
US4915595A (en) * | 1988-06-15 | 1990-04-10 | Deere & Company | Valve/piston cartridge and rotor bearing pre-load for a radial piston pump |
DE4227854B4 (de) * | 1992-08-22 | 2005-12-15 | Robert Bosch Gmbh | Kraftstoffeinspritzpumpe für Brennkraftmaschinen |
US5385124A (en) * | 1994-05-31 | 1995-01-31 | Eaton Corporation | Roller follower axle |
GB9606493D0 (en) * | 1996-03-23 | 1996-06-05 | Lucas Ind Plc | Fuel pump |
JP2004150290A (ja) * | 2002-10-29 | 2004-05-27 | Bosch Automotive Systems Corp | 燃料供給用ポンプおよびタペット構造体 |
AU2003275677A1 (en) * | 2002-10-29 | 2004-05-25 | Bosch Automotive Systems Corporation | Fuel supply pump and tappet structure body |
JP3835755B2 (ja) * | 2002-12-25 | 2006-10-18 | ボッシュ株式会社 | 燃料供給用ポンプ |
ATE463670T1 (de) * | 2004-01-14 | 2010-04-15 | Bosch Corp | Kraftstoffzufuhrpumpe |
JP4467469B2 (ja) * | 2005-06-08 | 2010-05-26 | ボッシュ株式会社 | 燃料供給用ポンプ及びタペット構造体 |
DE102006041673A1 (de) * | 2006-02-20 | 2007-08-23 | Robert Bosch Gmbh | Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
JP2007303430A (ja) * | 2006-05-15 | 2007-11-22 | Bosch Corp | 燃料供給用ポンプ |
DE102006045933A1 (de) * | 2006-09-28 | 2008-04-03 | Robert Bosch Gmbh | Stößelbaugruppe für eine Hochdruckpumpe und Hochdruckpumpe mit wenigstens einer Stößelbaugruppe |
DE102006048722A1 (de) * | 2006-10-16 | 2008-04-17 | Robert Bosch Gmbh | Kolbenpumpe, insbesondere Kraftstoffhochdruckpumpe, mit Rollenstößel |
US7568461B1 (en) * | 2008-06-20 | 2009-08-04 | Gm Global Technology Operations, Inc. | Tappet roller end shape for improved lubrication and combination with fuel pump and engine |
JP2010037997A (ja) * | 2008-08-01 | 2010-02-18 | Denso Corp | 燃料供給ポンプ |
-
2008
- 2008-05-20 DE DE102008001871A patent/DE102008001871A1/de not_active Withdrawn
-
2009
- 2009-03-20 US US12/994,012 patent/US20110073078A1/en not_active Abandoned
- 2009-03-20 KR KR1020107025912A patent/KR20110006689A/ko not_active Application Discontinuation
- 2009-03-20 JP JP2011509905A patent/JP5200162B2/ja not_active Expired - Fee Related
- 2009-03-20 EP EP09749669A patent/EP2288804B1/de not_active Not-in-force
- 2009-03-20 WO PCT/EP2009/053304 patent/WO2009141179A1/de active Application Filing
- 2009-03-20 PL PL09749669T patent/PL2288804T3/pl unknown
- 2009-03-20 RU RU2010152004/06A patent/RU2010152004A/ru not_active Application Discontinuation
- 2009-03-20 CN CN2009801182714A patent/CN102037235A/zh active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2009141179A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102037235A (zh) | 2011-04-27 |
KR20110006689A (ko) | 2011-01-20 |
EP2288804B1 (de) | 2012-05-23 |
JP5200162B2 (ja) | 2013-05-15 |
RU2010152004A (ru) | 2012-06-27 |
JP2011521159A (ja) | 2011-07-21 |
US20110073078A1 (en) | 2011-03-31 |
WO2009141179A1 (de) | 2009-11-26 |
PL2288804T3 (pl) | 2012-09-28 |
DE102008001871A1 (de) | 2009-11-26 |
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