EP2964954B1 - Hochdruckpumpe für ein kraftstoffeinspritzsystem - Google Patents

Hochdruckpumpe für ein kraftstoffeinspritzsystem Download PDF

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Publication number
EP2964954B1
EP2964954B1 EP14702011.9A EP14702011A EP2964954B1 EP 2964954 B1 EP2964954 B1 EP 2964954B1 EP 14702011 A EP14702011 A EP 14702011A EP 2964954 B1 EP2964954 B1 EP 2964954B1
Authority
EP
European Patent Office
Prior art keywords
pump
cam
rollers
offset
drive shaft
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.)
Active
Application number
EP14702011.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2964954A1 (de
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 EP2964954A1 publication Critical patent/EP2964954A1/de
Application granted granted Critical
Publication of EP2964954B1 publication Critical patent/EP2964954B1/de
Active legal-status Critical Current
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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
    • F02M59/04—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • 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
    • 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
    • F04B1/0413—Cams
    • F04B1/0417—Cams consisting of two or more cylindrical elements, e.g. rollers
    • 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
    • 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

Definitions

  • the invention relates to a high-pressure pump for a fuel injection system, in particular a common-rail injection system, having the features of the preamble of claim 1.
  • a high pressure pump of the type mentioned above is an example of the published patent application DE 10 2009 001 315 A1 out.
  • This high-pressure pump has a pump housing, in which at least two pump elements arranged radially around a drive shaft are accommodated, each pump element having a pump piston which is indirectly supported by a plunger assembly on a cam of the drive shaft, so that the pump piston by a rotation of the drive shaft to a lifting movement is driven.
  • the plunger assemblies include rollers which are offset with respect to a longitudinal axis of the drive shaft with respect to their angular positions offset from each other on an outer peripheral surface of the cam.
  • the rollers of the two pump elements can perform a movement in the axial direction with respect to the longitudinal axis of the drive shaft, so that they rest axially offset from one another on the outer peripheral surface of the cam.
  • the rollers in this case are largely in the same area of the outer peripheral surface of the cam.
  • Each high-pressure pumps are known in which a plurality of pump elements are arranged side by side in the direction of the longitudinal axis of a drive shaft.
  • the drive shaft has a plurality of separate eccentrics or cams arranged side by side in the axial direction, against which the pump elements rest via a roller. Adjacent cams or cams are offset from one another with respect to their angular position.
  • the present invention has for its object to provide a high-pressure pump of the aforementioned type, the life is significantly increased with low production costs and space.
  • the proposed high-pressure pump for a fuel injection system in particular a common rail injection system, comprises a pump housing in which at least two pump elements arranged radially around a drive shaft are accommodated.
  • each pump element has a pump piston which indirectly supported by a plunger assembly on a cam of the drive shaft is, so that the pump piston is driven by a rotation of the drive shaft to a lifting movement.
  • the plunger assemblies comprise rollers which lie axially with respect to a longitudinal axis A of the drive shaft and, with respect to their angular positions, abut each other on an outer circumferential surface of the cam.
  • the rollers of the plurality of ram assemblies are also offset with respect to their angular positions.
  • the angular offset ⁇ can be 60 °, 90 ° or 120 °.
  • the optimum angular offset depends, inter alia, on the specific design of the cam and / or the number of pump elements and thus the pump piston to be supported on the cam.
  • the angular offset makes it possible to drive the pump pistons of the plurality of pump elements in a lifting movement such that they each reach their top dead center with a time offset.
  • the cam may be formed as a double cam having two offset by 180 ° to each other arranged projections.
  • two pump pistons are supported via a respective plunger assembly whose roles offset by 90 ° and lie in different radial planes.
  • an appropriate arrangement of the two pump elements of the double cam causes an opposite movement of the pump piston of the two pump elements. This means that one pump piston performs a delivery stroke and the other pump piston performs a suction stroke. With only one cam can be increased in this way the delivery of the high-pressure pump.
  • At least two pump elements are accommodated in the pump housing, which are arranged in different radial planes and in an offset angular position.
  • Such a high pressure pump is particularly suitable for use in common rail injection systems.
  • Fig.1 illustrated high-pressure pump comprises a multi-part pump housing 1, in which two pump elements 3, 3 'are received, which are arranged with respect to a longitudinal axis A of a drive shaft 2 in different radial planes, ie axially offset from each other, and in different angular positions.
  • the axial offset is a roller width b or b ', so that the rollers 7, 7' of the plunger assemblies 5, 5 'come to lie next to one another.
  • the two pump elements 3, 3 'offset by an angle ⁇ 90 ° to each other (see FIG. 2 ).
  • Each pump element 3, 3 ' has a pump piston 4, 4', which is supported on an outer peripheral surface 8 of a cam 6 via a plunger assembly 5, 5 'or a roller 7, 7' of the respective plunger assembly 5, 5 '.
  • the pump pistons 4, 4 ' are thus driven in a stroke movement.
  • the cam 6 is designed as a 180 ° double cam (see FIG. 2 ) and has a width a.
  • the width a of the illustrated cam 6 corresponds to the sum of the widths b, b 'of the rollers 7, 7' (see FIG FIG. 1 ).
  • the long service life of the high-pressure pump according to the invention promises long running times, so that it is suitable not only for use in passenger cars, but also for use in commercial vehicles and trucks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)
EP14702011.9A 2013-03-07 2014-01-30 Hochdruckpumpe für ein kraftstoffeinspritzsystem Active EP2964954B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102013203874 2013-03-07
DE102013206025.4A DE102013206025A1 (de) 2013-03-07 2013-04-05 Hochdruckpumpe für ein Kraftstoffeinspritzsystem
PCT/EP2014/051767 WO2014135313A1 (de) 2013-03-07 2014-01-30 Hochdruckpumpe für ein kraftstoffeinspritzsystem

Publications (2)

Publication Number Publication Date
EP2964954A1 EP2964954A1 (de) 2016-01-13
EP2964954B1 true EP2964954B1 (de) 2019-05-01

Family

ID=51385619

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14702011.9A Active EP2964954B1 (de) 2013-03-07 2014-01-30 Hochdruckpumpe für ein kraftstoffeinspritzsystem

Country Status (4)

Country Link
EP (1) EP2964954B1 (zh)
CN (1) CN105026753B (zh)
DE (1) DE102013206025A1 (zh)
WO (1) WO2014135313A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014225982A1 (de) 2014-12-16 2016-06-16 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
GB2570154A (en) * 2018-01-15 2019-07-17 Delphi Tech Ip Ltd High pressure diesel fuel pump
DE102019208179A1 (de) * 2019-06-05 2020-12-10 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
CN116324156A (zh) 2020-09-24 2023-06-23 康明斯有限公司 带有用于凸角间隙的泄压切口的泵壳体

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10356262A1 (de) * 2003-12-03 2005-06-30 Robert Bosch Gmbh Radialkolbenpumpe, insbesondere für Kraftstoffeinspritzsysteme
DE102008042881A1 (de) * 2008-10-16 2010-04-22 Robert Bosch Gmbh Hochdruckpumpenanordnung
DE102009001315A1 (de) * 2009-03-04 2010-09-09 Robert Bosch Gmbh Kolbenpumpe
DE102009026735A1 (de) 2009-06-04 2010-12-09 Robert Bosch Gmbh Hochdruckpumpe
DE102010030852A1 (de) * 2010-07-02 2012-01-05 Robert Bosch Gmbh Hochdruckpumpe
DE102010039269A1 (de) * 2010-08-12 2012-02-16 Robert Bosch Gmbh Kolbenpumpen für eine hydraulische Fahrzeugbremsanlage
DE102011007686A1 (de) * 2011-04-19 2012-10-25 Robert Bosch Gmbh Kraftstofffördereinrichtung für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN105026753A (zh) 2015-11-04
CN105026753B (zh) 2018-06-05
WO2014135313A1 (de) 2014-09-12
DE102013206025A1 (de) 2014-09-11
EP2964954A1 (de) 2016-01-13

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