EP2288804B1 - Kraftstoffhochdruckpumpe - Google Patents

Kraftstoffhochdruckpumpe Download PDF

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Publication number
EP2288804B1
EP2288804B1 EP09749669A EP09749669A EP2288804B1 EP 2288804 B1 EP2288804 B1 EP 2288804B1 EP 09749669 A EP09749669 A EP 09749669A EP 09749669 A EP09749669 A EP 09749669A EP 2288804 B1 EP2288804 B1 EP 2288804B1
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.)
Not-in-force
Application number
EP09749669A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2288804A1 (de
Inventor
Werner Vallon
Gerhard Meier
Andreas Dutt
Frank Maurer
Jochen Aleker
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
Priority to PL09749669T priority Critical patent/PL2288804T3/pl
Publication of EP2288804A1 publication Critical patent/EP2288804A1/de
Application granted granted Critical
Publication of EP2288804B1 publication Critical patent/EP2288804B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 according to the preamble of claim 1.
  • Such a high-pressure fuel pump is through JP-A-2004/204 761 known.
  • This high-pressure fuel pump has a pump housing and at least one pump element, which comprises a piston which is driven by a cam, which cooperates with a roller.
  • the roller is limited at its ends by two side contact surfaces, which come into contact with mating surfaces during operation of the high-pressure fuel pump.
  • the side contact surfaces are designed as circular ring disc surfaces and released in a central inner region from contact with the counter surfaces.
  • the high-pressure fuel pump with the features of claim 1 has the advantage that can be significantly reduced by the targeted exemptions during operation of the high-pressure fuel pump by side starting of the roller on the associated mating surfaces caused Reibungsverschharide.
  • a surface is referred to, which is covered by two concentric or coaxial circles.
  • the annular surface can be made flat or curved.
  • a 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 referred to in conventional wheels as the tip radius.
  • 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 belonging to the sphere surface Part of a spherical layer, which results when a sphere 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 are essentially in 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 a truncated cone.
  • the cone angle is preferably selected so that the coaxial outer regions fall steeper outwards than the annular disk surfaces.
  • transitions between the central inner regions and the associated annular disk surfaces, between the annular disk 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.
  • a section of a high-pressure fuel pump 1 with a pump housing 2 in longitudinal section through a pump element 3 is shown.
  • 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.
  • a central high-pressure fuel accumulator fuel injection valves which are also referred to as injectors, connected, via which the high-pressure fuel is injected into combustion chambers of an internal combustion engine.
  • 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 has substantially the shape of a straight circular cylinder with a longitudinal axis 9. By a double arrow 10 is indicated that the high-pressure piston 8 is guided in the element body 6 along the longitudinal axis 9 movable back and forth.
  • 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. Furthermore, the pressure chamber communicates via a pressure valve with the central high-pressure fuel accumulator.
  • fuel is sucked into the pressure chamber.
  • high pressure is applied to the fuel therein.
  • 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 has substantially the shape of a hollow circular cylinder and has radially inside 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 is indicated that the drive shaft 20 rotates with the cam 18 during operation of the high-pressure fuel pump 1 about the rotation axis 21.
  • roller 15 is shown alone in 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 is a section IV off FIG. 3 enlarged shown in 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 roller crest within the inner diameter 41 and outside the outer diameter 42 is selectively exempted to limit the contact of the side run of the roller 15 on the annular disk surface 40 between the inner diameter 41 and the outer diameter 42.
  • This exemption can be how to get in FIG. 4 sees can be realized by an angle change at the transition between the annular disk surface 40 and the coaxial outer region 46 and / or by the flat 41.
  • FIG. 5 For example, the end 31 is shown with a circular disk surface 50 extending between an inner diameter 51 and an outer diameter 52.
  • the annular disk surface 50 is designed substantially the same as that in FIG. 4 shown annular disk surface 40.
  • a recess 54 is provided in FIG. 5 within the inner diameter 51.
  • the depth or height of the recess 51 is designated 55.
  • 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 is performed depending on the operating boundary conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
EP09749669A 2008-05-20 2009-03-20 Kraftstoffhochdruckpumpe Not-in-force EP2288804B1 (de)

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 EP2288804A1 (de) 2011-03-02
EP2288804B1 true 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 (pl)
EP (1) EP2288804B1 (pl)
JP (1) JP5200162B2 (pl)
KR (1) KR20110006689A (pl)
CN (1) CN102037235A (pl)
DE (1) DE102008001871A1 (pl)
PL (1) PL2288804T3 (pl)
RU (1) RU2010152004A (pl)
WO (1) WO2009141179A1 (pl)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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
WO2022036230A1 (en) * 2020-08-14 2022-02-17 Cummins Inc. Sliding cam follower

Family Cites Families (16)

* Cited by examiner, † Cited by third party
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
KR100674772B1 (ko) * 2002-10-29 2007-01-25 봇슈 가부시키가이샤 연료 공급용 펌프 및 태핏 구조체
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
JP3835755B2 (ja) * 2002-12-25 2006-10-18 ボッシュ株式会社 燃料供給用ポンプ
KR100738778B1 (ko) * 2004-01-14 2007-07-12 봇슈 가부시키가이샤 연료공급용 펌프
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

Also Published As

Publication number Publication date
JP5200162B2 (ja) 2013-05-15
RU2010152004A (ru) 2012-06-27
EP2288804A1 (de) 2011-03-02
US20110073078A1 (en) 2011-03-31
CN102037235A (zh) 2011-04-27
JP2011521159A (ja) 2011-07-21
KR20110006689A (ko) 2011-01-20
PL2288804T3 (pl) 2012-09-28
WO2009141179A1 (de) 2009-11-26
DE102008001871A1 (de) 2009-11-26

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