EP1121530B1 - Kolbenpumpe zur kraftstoffhochdruckversorgung - Google Patents

Kolbenpumpe zur kraftstoffhochdruckversorgung Download PDF

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Publication number
EP1121530B1
EP1121530B1 EP99939360A EP99939360A EP1121530B1 EP 1121530 B1 EP1121530 B1 EP 1121530B1 EP 99939360 A EP99939360 A EP 99939360A EP 99939360 A EP99939360 A EP 99939360A EP 1121530 B1 EP1121530 B1 EP 1121530B1
Authority
EP
European Patent Office
Prior art keywords
plate
pump housing
channel
pump
pressure
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.)
Expired - Lifetime
Application number
EP99939360A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1121530A1 (de
Inventor
Peter Grabert
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 EP1121530A1 publication Critical patent/EP1121530A1/de
Application granted granted Critical
Publication of EP1121530B1 publication Critical patent/EP1121530B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F04B1/0448—Sealing means, e.g. for shafts or housings

Definitions

  • the invention relates to a piston pump according to the Genus of claim 1.
  • Such a piston pump is already known (DE 44 01 074 A1), in which a first plate flange-shaped with a central, radial against one Drive shaft of the pump facing a cylinder Pump piston formed and about half of the Plate thickness suitable in a countersink of a pump housing is included.
  • a valve plate On the side of the first facing away from the shaft Plate is a valve plate with a first and a second check valve supported.
  • the first plate and the valve plate are from a second, the pump housing final plate overlapped, which with the Pump housing is screwed.
  • the second plate is a fuel with low pressure leading Channel, on the one hand, with a channel of the pump housing and on the other hand in connection with the first check valve stands.
  • the radial piston pump can Assembly errors occur which affect the pump function impair or lead to failure. Possible errors are, for example, incorrect insertion of the Form seal in the recess of the second plate with the Consequence of a cross-sectional restriction of the first channel, Tilting the connector in the course of the second channel with the result of a leak and the misalignment of the second plate, the latter error also caused by uneven screwing of the second plate on Pump housing can be caused.
  • the piston pump according to the invention with the features of Claim 1 has the advantage that less constructive components than at the known level of development be used that a defined geometric assignment of the two plates lying flat on top of each other and that the second check valve on a manufacturing and assembly technically favorable place is arranged.
  • a radial piston pump 1 designed as a high-pressure pump is for high-pressure fuel supply Fuel injection systems, especially in a common rail injection system, provided by internal combustion engines.
  • the radial piston pump 1 has a pump housing 2 with a therein drive shaft 3, which one Eccentric section 4, on which a cam ring 5 is mounted is.
  • the by means of the eccentric section 4 Drive shaft 3 longitudinally movable pump piston 6 is in one Cylinder 9 guided, which in an interior 10 of the Pump housing 2 protrudes.
  • the pump piston 6 with Slide shoe 7 and the cylinder 9 form in connection with a first, suction-side check valve 11 and one second, pressure-side check valve 12 is a pump element 13 of the radial piston pump 1.
  • This is preferably two equipped further pump elements 13, which in a common, with respect to the drive shaft 13 radial plane lie and are offset from each other by 120 °.
  • the pump housing 2 is against the drive shaft side Interior through a right angle to the pump piston axis extending first plate 16 completed.
  • the first plate 16 lies essentially over the entire surface of the pump housing 2.
  • the cylinder 9 is in one piece on the first plate 16 educated.
  • a receiving the pump piston 6 Cylinder chamber 17 is continued in the first plate 16.
  • the first plate 16 faces away from a second Plate 18 covered with which the cylinder space 17th is completed.
  • the second plate 18 is congruent and essentially over the entire surface of the first plate 16 on.
  • the two plates 16 and 18 are with screws 19 connected to the pump housing 2.
  • Check valve 11 arranged. It has one spring-loaded, disc-shaped closing body 20, the one flat valve seat 21 assigned to the second plate 18 is. The second plate 18 is therefore at least in the area of the valve seat 21 hardened.
  • the second check valve 12 is between the first plate 16 and the pump housing 2 arranged. It has a spherical closing body 22 with a hollow cone-shaped valve seat 23. This is in the first plate 16 formed; in this respect is the first record hardened at least in the area of the valve seat.
  • the radial piston pump 1 is by means of a Low-pressure feed pump 26, for example, from one Diesel fuel reservoir 27 of a motor vehicle with Fuel can be supplied. This is the low pressure feed pump 26 to a in the pump housing 2 of the radial piston pump 1 arranged overflow valve 28 connected.
  • the Overflow valve 28 is located in the pump housing 2 trained first channel 29 in connection, which the penetrates first plate 16 at right angles to its plane and opens into the second plate 18.
  • the first channel 29 is in the second plate 18 continued in its plane and ends after a 90 ° deflection on the first Check valve 11.
  • the as a circular cylindrical bore formed first channel 29 is in the second plate 18th sealed by a pressed-in ball 30.
  • the first channel 29 opens in the middle of the valve seat 21 of the first check valve 11 in the cylinder chamber 17. From Cylinder chamber 17 is inclined in the first plate 16 extending, second channel 31, which to the second Check valve 12 leads and in the middle of its valve seat 23 opens. In the area of the first plate 16, the second one Channel 31 none to the outside of the radial piston pump 1 leading connection to be closed. After the first Plate 16 is the second channel 31 within the Pump housing 2 continued, where it with a connection 33rd for a fuel high-pressure accumulator and with one Electromagnetically controllable pressure relief valve 34 (only partially shown) with downstream connection to the Diesel fuel reservoir 27 communicates.
  • a first Low pressure seal 37 is between the pump housing 2 and the first plate 16 arranged.
  • the low pressure seal 37 is preferably designed as a rubber-elastic O-ring and in one concentrically spaced the cylinder 9 enclosing groove of the first plate 16 added.
  • a second low-pressure seal 38 is correspondingly in the first plate 16 and a third Low pressure seal 39 arranged in the second plate 18, which each enclose only the first channel 29 and are also designed as a rubber-elastic O-ring.
  • a first high pressure seal 40 is between the first Plate 16 and the second plate 18 arranged and concentrically encloses the first check valve 11 and the cylinder space 17.
  • a second high pressure seal 41 is located between the first plate 16 and the Pump housing 2. It only encloses the second Check valve 12.
  • the high pressure seals 40 and 41 can be designed as metallic seals; for example, they can act as a bite edge seal be designed. In the drawing they are Low pressure seals 37, 38, 39 and the High-pressure seals 40, 41 are only indicated symbolically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP99939360A 1998-10-17 1999-06-17 Kolbenpumpe zur kraftstoffhochdruckversorgung Expired - Lifetime EP1121530B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19848040A DE19848040A1 (de) 1998-10-17 1998-10-17 Kolbenpumpe zur Kraftstoffhochdruckversorgung
DE19848040 1998-10-17
PCT/DE1999/001781 WO2000023710A1 (de) 1998-10-17 1999-06-17 Kolbenpumpe zur kraftstoffhochdruckversorgung

Publications (2)

Publication Number Publication Date
EP1121530A1 EP1121530A1 (de) 2001-08-08
EP1121530B1 true EP1121530B1 (de) 2003-01-22

Family

ID=7884884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99939360A Expired - Lifetime EP1121530B1 (de) 1998-10-17 1999-06-17 Kolbenpumpe zur kraftstoffhochdruckversorgung

Country Status (5)

Country Link
US (1) US6450788B1 (ja)
EP (1) EP1121530B1 (ja)
JP (1) JP4199930B2 (ja)
DE (2) DE19848040A1 (ja)
WO (1) WO2000023710A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8590442B2 (en) 2007-12-06 2013-11-26 Robert Bosch Gmbh Gasket for high-pressure pump and high-pressure pump comprising said gasket

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19860672A1 (de) * 1998-12-29 2000-07-13 Bosch Gmbh Robert Kolbenpumpe zur Kraftstoffhochdruckerzeugung
IT1308780B1 (it) * 1999-07-02 2002-01-10 Elasis Sistema Ricerca Fiat Pompa ad alta pressione munita di valvola di intercettazione perl'alimentazione di combustibile ad un motore a combustione interna.
IT1310755B1 (it) * 1999-11-30 2002-02-22 Elasis Sistema Ricerca Fiat Pompa idraulica ad alta pressione, in particolare pompa a pistoniradiali per il carburante di un motore a combustione interna.
DE10221305A1 (de) * 2002-05-14 2003-11-27 Bosch Gmbh Robert Radialkolbenpumpe für Kraftstoffeinspritzsystem mit verbesserter Hochdruckfestigkeit
US20040022654A1 (en) * 2002-08-05 2004-02-05 Takashi Ishida Piston type small discharge pump
DE10310123A1 (de) * 2003-03-07 2004-09-23 Siemens Ag Radialkolbenpumpe
DE102004041764A1 (de) * 2004-08-28 2006-03-02 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
DE102006017036A1 (de) * 2006-04-11 2007-10-18 Siemens Ag Radialkolbenpumpe zur Kraftstoff-Hochdruckversorgung bei einer Brennkraftmaschine
DE102007011319A1 (de) 2007-03-08 2008-09-11 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
DE102007038525A1 (de) * 2007-08-16 2009-02-19 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe
US20090057345A1 (en) * 2007-08-31 2009-03-05 Dukes Stephen A Fluid dispenser
ITMI20072219A1 (it) * 2007-11-23 2009-05-24 Bosch Gmbh Robert Valvola di sovrappressione e pompa di alta pressione comprendente tale valvola di sovrappressione
JP5295802B2 (ja) * 2009-01-30 2013-09-18 ヤンマー株式会社 燃料噴射ポンプ
ES2721012T3 (es) 2012-12-18 2019-07-26 Emerson Climate Technologies Compresor alternativo con sistema de inyección de vapor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2333103A1 (de) * 1973-06-29 1975-01-16 Rexroth Gmbh G L Radialkolbenmaschine
DE2557731B1 (de) * 1975-12-20 1977-04-28 Langen & Co Hydraulische Radialkolbenpumpe
DE4213781C2 (de) * 1992-04-27 2002-10-24 Bosch Gmbh Robert Radialkolbenpumpe, insbesondere Kraftstoffpumpe für Verbrennungsmotoren
IT1261556B (it) * 1992-04-27 1996-05-23 Elasis Sistema Ricerca Fiat Pompa a pistoni radiali, in particolare per il combustibile di motori a combustione interna.
DE4401074B4 (de) * 1994-01-15 2007-01-18 Robert Bosch Gmbh Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine
JP2001506343A (ja) * 1997-07-11 2001-05-15 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 燃料高圧供給のためのラジアルピストンポンプ
DE19744577A1 (de) * 1997-10-09 1999-04-22 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
DE19756087A1 (de) * 1997-12-17 1999-06-24 Bosch Gmbh Robert Hochdruckpumpe zur Kraftstoffversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen
DE19841642C2 (de) * 1998-09-11 2002-07-18 Bosch Gmbh Robert Radialkolbenpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8590442B2 (en) 2007-12-06 2013-11-26 Robert Bosch Gmbh Gasket for high-pressure pump and high-pressure pump comprising said gasket

Also Published As

Publication number Publication date
DE19848040A1 (de) 2000-04-20
EP1121530A1 (de) 2001-08-08
DE59904113D1 (de) 2003-02-27
WO2000023710A1 (de) 2000-04-27
JP2002527680A (ja) 2002-08-27
JP4199930B2 (ja) 2008-12-24
US6450788B1 (en) 2002-09-17

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