EP0387504A1 - Buse d'injection de carburant pour moteurs à combustion interne - Google Patents

Buse d'injection de carburant pour moteurs à combustion interne Download PDF

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Publication number
EP0387504A1
EP0387504A1 EP90101373A EP90101373A EP0387504A1 EP 0387504 A1 EP0387504 A1 EP 0387504A1 EP 90101373 A EP90101373 A EP 90101373A EP 90101373 A EP90101373 A EP 90101373A EP 0387504 A1 EP0387504 A1 EP 0387504A1
Authority
EP
European Patent Office
Prior art keywords
nozzle holder
union nut
connecting piece
leakage oil
nozzle
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.)
Withdrawn
Application number
EP90101373A
Other languages
German (de)
English (en)
Inventor
Karl Dipl.-Ing. Hofmann
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 EP0387504A1 publication Critical patent/EP0387504A1/fr
Withdrawn legal-status Critical Current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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to a fuel injection nozzle according to the preamble of the main claim.
  • a known injection nozzle of this type (DE-OS 29 43 745)
  • connecting nipples for the leakage oil line are arranged laterally under the connecting piece for the fuel supply line on the nozzle holder.
  • This version is characterized by a particularly short overall length of the nozzle holder. If the installation conditions are unfavorable, it can happen that the connection nipples for the drain line are difficult or not accessible at all.
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that even in cases where the installation space for the injector is limited to the side, but also upwards, the connecting nipples for the leakage oil line are easily accessible.
  • the transition of the leakage oil guide from the nozzle holder into the union nut can be sealed easily and securely if the leakage oil channel running in the nozzle holder opens out at an annular shoulder of the nozzle holder formed at the transition of the connecting piece to a cylindrical section and the union nut is provided with a collar-shaped attachment which is tightened when tightened Fuel supply line engages over the cylindrical section of the nozzle holder adjoining the connecting piece and delimits a leakage oil collecting space between itself and the nozzle holder, from which a leakage oil hole in the union nut next to its threaded bore leads to the connection nipple.
  • a sufficiently large sealing ring can be conveniently accommodated between the collar-shaped extension of the union nut and the cylindrical section of the nozzle holder encompassed by it, without the diameter of the nozzle holder having to be enlarged.
  • the injection nozzle has a nozzle holder 10, to which, as is customary and therefore not shown, a nozzle body is fastened, which is provided with a valve seat in front of a nozzle opening and slidably supports a valve needle which is pressed against the valve seat by a closing spring accommodated in the nozzle holder 10 is.
  • the Nozzle holder 10 has a cylindrical section 12 of larger diameter which merges at an annular shoulder 14 into a cylindrical section 16 of smaller diameter, which in turn merges at a conical ring shoulder 18 into an externally threaded connecting piece 20 for a fuel supply line 22.
  • a fuel channel 24 leads from the connecting piece 20 to a pressure space in the nozzle body surrounding the valve needle.
  • a leakage oil channel 26 is connected to the closing spring chamber in the nozzle holder 10 and opens out from the nozzle holder 10 on the annular shoulder 18.
  • the fuel supply line 22 is fastened to the nozzle holder 10 by a union nut 30 screwed onto the connecting piece 20 with the aid of a conical clamping piece 32 and the interposition of a sealing ring 34.
  • the union nut 30 has a section 36 provided with wrench surfaces, to which an externally cylindrical threaded section 38 adjoins, which merges on the inside via a conical annular shoulder 39 into an axial annular collar 40 encompassing the cylindrical section 16 of the nozzle holder 10.
  • an annular space 42 is formed between the annular shoulders 18 and 39 on the nozzle holder 10 and on the union nut 30, in which the leak oil supplied via the leak oil channel 26 collects.
  • the annular gap between the cylindrical section 16 of the nozzle holder 10 and the ring collar 40 of the union nut 30 is sealed to the outside by an O-ring 44, which is seated in an annular groove in the nozzle holder 10.
  • connection nipples 50 are provided on the end face 48 of the union nut 30 facing away from the nozzle holder 10, each of which is connected to the annular space 42 via a larger bore section 52 and a smaller bore section 54 in the union nut 30.
  • the bore sections 52 cut between the union nut 30 and the parts used for tightening the fuel supply line 22 32, 34 formed annular space 56, so that the leak oil is also removed from this space.
  • the connection nipples 50 can be inclined at an acute angle a to the nozzle axis 58 for easier access, which is chosen so that the connection nipples 50 do not hinder the insertion of a socket wrench on the union nut 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP90101373A 1989-03-11 1990-01-24 Buse d'injection de carburant pour moteurs à combustion interne Withdrawn EP0387504A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907958 1989-03-11
DE19893907958 DE3907958A1 (de) 1989-03-11 1989-03-11 Kraftstoff-einspritzduese fuer brennkraftmaschinen

Publications (1)

Publication Number Publication Date
EP0387504A1 true EP0387504A1 (fr) 1990-09-19

Family

ID=6376126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101373A Withdrawn EP0387504A1 (fr) 1989-03-11 1990-01-24 Buse d'injection de carburant pour moteurs à combustion interne

Country Status (3)

Country Link
EP (1) EP0387504A1 (fr)
JP (1) JPH02283856A (fr)
DE (1) DE3907958A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2254654A (en) * 1991-04-12 1992-10-14 Daimler Benz Ag Leakage fuel connection of an i.c.engine fuel injector.
GB2314123A (en) * 1996-06-14 1997-12-17 Bosch Gmbh Robert Fuel supply device for a fuel injection valve for an i.c. engines
FR2783571A1 (fr) * 1998-09-22 2000-03-24 Bosch Gmbh Robert Injecteur de carburant pour des moteurs a combustion interne
FR2869652A1 (fr) * 2004-04-28 2005-11-04 Renault Sas Dispositif d'etancheite haute pression
EP1783357A1 (fr) * 2005-11-02 2007-05-09 Delphi Technologies, Inc. Structure de connexion pour l'alimentation haute pression en carburant pour un injecteur
WO2010118922A1 (fr) * 2009-04-17 2010-10-21 Delphi Technologies Holding S.À.R.L. Dispositif de raccord pour système à fluide
WO2019111031A1 (fr) * 2017-12-08 2019-06-13 Volvo Truck Corporation Dispositif pour système d'injection de carburant à rampe de distribution commune

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10002365B4 (de) * 2000-01-20 2005-12-01 Siemens Ag Einspritzsystem für Kraftstoffeinspritzanlagen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126158A (en) * 1964-03-24 Dreisin
DE2943745A1 (de) * 1979-10-30 1981-05-14 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE3330771A1 (de) * 1983-08-26 1985-03-14 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzeinrichtung mit hilfspumpe zur vor- und haupteinspritzung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126158A (en) * 1964-03-24 Dreisin
DE2943745A1 (de) * 1979-10-30 1981-05-14 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE3330771A1 (de) * 1983-08-26 1985-03-14 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzeinrichtung mit hilfspumpe zur vor- und haupteinspritzung

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2254654A (en) * 1991-04-12 1992-10-14 Daimler Benz Ag Leakage fuel connection of an i.c.engine fuel injector.
GB2254654B (en) * 1991-04-12 1994-04-27 Daimler Benz Ag A fuel injection nozzle for an internal combustion engine
GB2314123A (en) * 1996-06-14 1997-12-17 Bosch Gmbh Robert Fuel supply device for a fuel injection valve for an i.c. engines
GB2314123B (en) * 1996-06-14 1998-07-15 Bosch Gmbh Robert Fuel supply device for a fuel injection valve for internal combustion engines
FR2783571A1 (fr) * 1998-09-22 2000-03-24 Bosch Gmbh Robert Injecteur de carburant pour des moteurs a combustion interne
FR2869652A1 (fr) * 2004-04-28 2005-11-04 Renault Sas Dispositif d'etancheite haute pression
EP1783357A1 (fr) * 2005-11-02 2007-05-09 Delphi Technologies, Inc. Structure de connexion pour l'alimentation haute pression en carburant pour un injecteur
WO2010118922A1 (fr) * 2009-04-17 2010-10-21 Delphi Technologies Holding S.À.R.L. Dispositif de raccord pour système à fluide
EP2243950A1 (fr) * 2009-04-17 2010-10-27 Delphi Technologies Holding S.à.r.l. Agencement de connecteur pour système fluide
US9109557B2 (en) 2009-04-17 2015-08-18 Delphi International Operations Luxembourg S.A.R.L. Connector arrangement for a fluid system
WO2019111031A1 (fr) * 2017-12-08 2019-06-13 Volvo Truck Corporation Dispositif pour système d'injection de carburant à rampe de distribution commune
US11136955B2 (en) 2017-12-08 2021-10-05 Volvo Truck Corporation Device for a common rail fuel injection system

Also Published As

Publication number Publication date
JPH02283856A (ja) 1990-11-21
DE3907958A1 (de) 1990-09-13

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