EP1604112B1 - Radialkolbenpumpe - Google Patents

Radialkolbenpumpe Download PDF

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Publication number
EP1604112B1
EP1604112B1 EP04713078A EP04713078A EP1604112B1 EP 1604112 B1 EP1604112 B1 EP 1604112B1 EP 04713078 A EP04713078 A EP 04713078A EP 04713078 A EP04713078 A EP 04713078A EP 1604112 B1 EP1604112 B1 EP 1604112B1
Authority
EP
European Patent Office
Prior art keywords
pump housing
channel
sealing area
pressure
radial 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.)
Expired - Lifetime
Application number
EP04713078A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1604112A1 (de
Inventor
Werner Knauth
Uwe Nigrin
Ngoc-Tam Vu
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.)
VDO Automotive AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1604112A1 publication Critical patent/EP1604112A1/de
Application granted granted Critical
Publication of EP1604112B1 publication Critical patent/EP1604112B1/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
    • 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
    • F04B1/0443—Draining of the housing; Arrangements for handling leaked fluids
    • 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
    • F04B53/22—Arrangements for enabling ready assembly or disassembly

Definitions

  • the invention relates to a radial piston pump for fuel high pressure generation in fuel injection systems.
  • a high-pressure fuel pump which has a pump housing and a plurality of cylinder inserts designed as cylinder heads. Each cylinder insert is fixed in the pump housing via a centering lug. From the pump housing, a suction line leads into the cylinder head. The fuel passes from the intake via an intake valve to the cylinder chamber. There, the fuel is compressed and then passes through a high-pressure valve and a high-pressure line back into the pump housing, from where the fuel to a common high-pressure accumulator, the so-called common rail arrives. Between the cylinder insert and the pump housing, an O-ring seal is arranged. To accommodate the O-ring seal, the cylinder insert has a groove.
  • the object of the invention is therefore to ensure a secure sealing of the high-pressure fuel pump with a simple assembly of the cylinder insert.
  • the invention is characterized in that the cylinder insert with an end face on a flattening of the pump housing rests and that the end face of the cylinder insert or the flattening of the pump housing has specifically designed raised sealing areas, which are small in relation to the entire face of the cylinder insert and the entire flattening of the pump housing, whereby a high surface pressure in the sealing area can be achieved.
  • the cylinder insert with an end face on a flattening of the pump housing rests and that the end face of the cylinder insert or the flattening of the pump housing has specifically designed raised sealing areas, which are small in relation to the entire face of the cylinder insert and the entire flattening of the pump housing, whereby a high surface pressure in the sealing area can be achieved.
  • an additional O-ring which significantly simplifies the installation of the cylinder insert. Damage to the sealing surface during assembly is largely excluded.
  • a preferred embodiment of the invention provides that a first raised sealing area is formed around the intake passage and a second raised sealing area around the high pressure passage.
  • the raised sealing areas can be made as small as possible, whereby a high surface pressure is made possible.
  • a further preferred embodiment of the invention provides that an additional third raised sealing area is formed around the first and the second sealing area, which completely surrounds the two sealing area. This ensures that in the event of a leak of the first and / or the second sealing area no fuel can pass through the sealing surfaces to the outside, but by the third enclosing sealing area, the tightness remains ensured.
  • FIG. 1 shows a detailed view of the high-pressure fuel pump.
  • the drawing shows a part of the pump housing 1 and a cylinder insert 2.
  • a plurality of preferably three at an angle of 120 ° staggered cylinder inserts are provided.
  • the cylinder insert 2 is fixed via a spigot in the pump housing 1 and rests with an end face 5 on a flattening 6 of the pump housing.
  • the cylinder insert 2 is clamped to the pump housing 1 via clamping means, not shown, preferably screws.
  • an intake passage 8 and a high-pressure passage 9 is introduced, each opening in the end face 5.
  • the pump housing 1 has a first, with the intake passage 8 corresponding channel 10, and a second, corresponding to the high-pressure passage 9 channel 11, which open into the flattening 6 of the pump housing 1.
  • the first channel 10 is arranged to the intake passage 8 and the second passage 11 is arranged substantially in alignment with the high-pressure passage 9.
  • the fuel passes from the pump housing 1, via the first, channel 10 to the intake passage 8 and an intake valve in the cylinder chamber 3. There, the fuel is compressed and then flows, via a high pressure valve, the high pressure passage 9 and the second channel 11 to a common high-pressure accumulator (not shown).
  • the end face 5 of the cylinder insert 2, which bears against the flattening 6 of the bottom housing 1, has a plurality of raised areas 12, 13, 14.
  • the raised areas 12, 13, 14 of the sealing area ie the bearing surface is reduced to the flattening 6 such that at the same tightening force a significantly higher surface pressure is achieved, as in the case of a flat end face.
  • a secure sealing of the cylinder insert 2 with respect to the pump housing 1 is achieved.
  • the first raised sealing area 12 is formed around the intake channel 8 and the second raised sealing area 13 around the high-pressure channel 9.
  • the sealing force is selectively introduced in the vicinity of the sealed areas.
  • the sealing surface can be minimized thereby, which leads to a high surface pressure in the sealing area.
  • an additional third raised sealing area 14 is formed, which completely encloses the two sealing areas 12, 13. This ensures that, in the event of a leak in the first and / or second sealing region, no fuel can escape to the outside via the sealing surfaces, but the tightness continues to be ensured by the third enclosing sealing region.
  • a cavity 15 is formed, in which the liquid can flow off in the event of a leakage of the first or second sealing area 12, 13.
  • a drain passage 16 is preferably provided. About the drain passage 16, the fuel can flow back to the fuel tank.
  • the cavity 15 can be used for monitoring purposes.
  • a corresponding sensor can be arranged within the cavity which, in the event of a leak in the first and / or second sealing region 12, 13, outputs a signal to a corresponding evaluation unit.
  • FIG. 2 shows an exploded view of the cylinder insert 2 used in FIG. 1, with a first raised sealing region 12 and a second raised sealing region 13.
  • the first and second raised sealing regions 12, 13 are substantially annular around the center of the intake passage 8 and the high pressure passage, respectively 9 trained.
  • the two raised sealing areas 12, 13 are completely enclosed by a third raised sealing area 14.
  • the fuel can flow into the cavity 15 and via the drainage channel 16 back to the fuel tank.
  • the targeted elaborate raised sealing portions 12, 13 and 14 are small in relation to the entire end face 5 of the cylinder insert 2. This results in a high surface pressure in the sealing area and thus a secure seal.
  • an elastomeric seal can additionally be provided in the region of the high-pressure passage 9.
  • the elastomer seal is preferably arranged together with a support ring 18 centrally in a, not shown, recess around the high-pressure channel 9.
  • four support surfaces 18 are preferably provided at the outer corners of the end face 5.
  • the sealing contour can advantageously be produced by electrochemical removal methods, by a screen printing method, by etching, eroding or surface embossing.
  • the raised areas are preferably 0.1 to 0.3 mm. This ensures that when clamping the cylinder insert with the pump housing only the raised areas have contact and the rest of the surface do not touch. At the same time, the necessary material removal remains low, resulting in a low processing time.
  • the proposed invention thus ensures a secure sealing of the cylinder insert relative to the pump housing.
  • the raised sealing areas and the high surface pressures that can be achieved thereby result in a high sealing force.
  • Additional sealing elements such as e.g. O-rings are not required. This simplifies the assembly effort considerably. In addition, incorrect assembly is largely excluded.
  • an additional third raised sealing area which surrounds the first and second sealing area, it is ensured that even in the event of a leak, the fuel can not escape from the pump housing.
  • the invention is not limited to the embodiments.
  • different embodiments of the raised sealing areas are possible.
  • the raised sealing areas may have different heights, whereby one can bring in the high pressure area, for example, a higher surface pressure than in the low pressure area.

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)
EP04713078A 2003-03-07 2004-02-20 Radialkolbenpumpe Expired - Lifetime EP1604112B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10310123A DE10310123A1 (de) 2003-03-07 2003-03-07 Radialkolbenpumpe
DE10310123 2003-03-07
PCT/EP2004/001702 WO2004079190A1 (de) 2003-03-07 2004-02-20 Radialkolbenpumpe

Publications (2)

Publication Number Publication Date
EP1604112A1 EP1604112A1 (de) 2005-12-14
EP1604112B1 true EP1604112B1 (de) 2007-07-04

Family

ID=32891954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04713078A Expired - Lifetime EP1604112B1 (de) 2003-03-07 2004-02-20 Radialkolbenpumpe

Country Status (6)

Country Link
US (1) US7415920B2 (zh)
EP (1) EP1604112B1 (zh)
JP (1) JP4372782B2 (zh)
CN (1) CN1756905B (zh)
DE (2) DE10310123A1 (zh)
WO (1) WO2004079190A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10310124B4 (de) * 2003-03-07 2009-09-10 Continental Automotive Gmbh Flachdichtung
DE102006017036A1 (de) 2006-04-11 2007-10-18 Siemens Ag Radialkolbenpumpe zur Kraftstoff-Hochdruckversorgung bei einer Brennkraftmaschine
US7240668B1 (en) * 2006-07-18 2007-07-10 Delphi Technologies, Inc. Fuel leak detection apparatus and method
JP4862077B2 (ja) 2006-09-18 2012-01-25 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング 液圧式機械のためのバルブ装置
JP5295802B2 (ja) * 2009-01-30 2013-09-18 ヤンマー株式会社 燃料噴射ポンプ
JP6366539B2 (ja) * 2015-05-29 2018-08-01 三菱重工業株式会社 ラジアルピストン式油圧機械および風力発電装置、並びにシール施工方法
DE102017222171A1 (de) * 2017-12-07 2019-06-13 Robert Bosch Gmbh Kraftstofffördereinrichtung für kryogene Kraftstoffe

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT338050B (de) 1975-06-27 1977-07-25 Friedmann & Maier Ag Brennstoffeinspritzpumpe fur einspritzbrennkraftmaschinen
AT338049B (de) 1975-06-27 1977-07-25 Friedmann & Maier Ag Brennstoffeinspritzpumpe fur einspritzbrennkraftmaschinen
JP3849067B2 (ja) * 1995-03-30 2006-11-22 ボッシュ株式会社 燃料噴射ポンプ
DE19526268A1 (de) * 1995-07-19 1997-01-23 Zahnradfabrik Friedrichshafen Automatgetriebe mit Hydraulikpumpe
DE19729788A1 (de) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
DE19729789A1 (de) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
US5897058A (en) 1997-09-25 1999-04-27 Caterpillar Inc. High pressure metal to metal sealing land in a control valve for a fuel injector
DE19801398A1 (de) * 1998-01-16 1999-07-22 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
DE19841642C2 (de) * 1998-09-11 2002-07-18 Bosch Gmbh Robert Radialkolbenpumpe
DE19848040A1 (de) 1998-10-17 2000-04-20 Bosch Gmbh Robert Kolbenpumpe zur Kraftstoffhochdruckversorgung
DE19914720B4 (de) 1999-03-31 2005-10-13 Siemens Ag Kraftstoffeinspritzventil für eine Brennkraftmaschine
IT1308782B1 (it) * 1999-07-02 2002-01-10 Elasis Sistema Ricerca Fiat Perfezionamenti ad una pompa ad alta pressione per l'alimentazione dicombustibile ad un motore a combustione interna.
DE10019810A1 (de) 2000-04-20 2002-01-31 Siemens Ag Einspritzventil mit optimierten Dichtflächen
DE10042305A1 (de) * 2000-08-29 2002-03-21 Siemens Ag Abdichtungsvorrichtung für einen Übergangsbereich an Hochdruckbauteilen
DE10102233A1 (de) 2001-01-19 2002-07-25 Bosch Gmbh Robert Kraftstoffhochdrucksystem für Brennkraftmaschinen

Also Published As

Publication number Publication date
CN1756905B (zh) 2011-06-08
US7415920B2 (en) 2008-08-26
WO2004079190A1 (de) 2004-09-16
JP4372782B2 (ja) 2009-11-25
US20050287016A1 (en) 2005-12-29
DE10310123A1 (de) 2004-09-23
CN1756905A (zh) 2006-04-05
EP1604112A1 (de) 2005-12-14
JP2006519950A (ja) 2006-08-31
DE502004004234D1 (de) 2007-08-16

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