EP0774579A1 - Anordnung zum Befestigen eines Kraftstoffeinspritzventils an den Zylinderkopf eines Verbrennungsmotors - Google Patents

Anordnung zum Befestigen eines Kraftstoffeinspritzventils an den Zylinderkopf eines Verbrennungsmotors Download PDF

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Publication number
EP0774579A1
EP0774579A1 EP96402173A EP96402173A EP0774579A1 EP 0774579 A1 EP0774579 A1 EP 0774579A1 EP 96402173 A EP96402173 A EP 96402173A EP 96402173 A EP96402173 A EP 96402173A EP 0774579 A1 EP0774579 A1 EP 0774579A1
Authority
EP
European Patent Office
Prior art keywords
injector
flange
cylinder head
face
recess
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.)
Granted
Application number
EP96402173A
Other languages
English (en)
French (fr)
Other versions
EP0774579B1 (de
Inventor
Didier Girard
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0774579A1 publication Critical patent/EP0774579A1/de
Application granted granted Critical
Publication of EP0774579B1 publication Critical patent/EP0774579B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors

Definitions

  • the present invention relates to a device for fixing a fuel injector to an internal combustion engine cylinder head.
  • Another fastening device is also known, according to which the injector is tightened in the cylinder head by a central nut bearing on a rod secured to the body of the injector.
  • This known device has the drawback that there is a risk of loosening of the central nut due to different thermal expansions of the injector and of the cylinder head and the central nut does not allow elastic recovery of the forces between the injector and cylinder head during such expansions.
  • it is necessary to tighten the central nut to a very high torque, but such tightening risks crushing the sealing washer between the injector and the cylinder head so that the latter may no longer perform its function d sealing.
  • the object of the present invention is to eliminate the above drawbacks of known devices by proposing a device for fixing an injector. of fuel on an internal combustion engine cylinder head, of the type in which the injector is held partially engaged in a cylindrical housing opening out from the cylinder head on a face thereof perpendicular to the injector by means of a flange spaced from this face and fixed to the cylinder head by two screws perpendicularly crossing this face, two opposite bosses of the flange, turned towards this face, being applied on two at least diametrically opposite bearing zones of the injector and which is characterized in that the bearing zones are produced in a recess opening onto the periphery of a cylindrical portion of the injector and receiving an intermediate part partially emerging from the recess and in that each boss of the flange, outside the cylindrical portion of the injector, is applied to an emerging part of the intermediate piece.
  • the recess is a peripheral groove and the two support zones are interconnected to form a circular support zone for the intermediate piece.
  • the intermediate piece consists of an elastic metal rod.
  • the two bosses of the flange are connected together by forming a circular support base for the flange on the two support zones of the injector.
  • a ring is interposed between the rod and the flange.
  • the support base of the flange comprises a chamfer cooperating with the rod.
  • the ring comprises a chamfer cooperating with the rod.
  • each support zone is produced in a radial recess consisting of a blind hole receiving a support lug of a corresponding boss of the flange.
  • Figure 1 is a longitudinal sectional view of the device of the invention for fixing a fuel injector on a cylinder head of an internal combustion engine.
  • Figure 2 is a partial sectional view along line II-II of Figure 1.
  • FIG. 3 is a partial perspective view along arrow III of FIG. 2.
  • Figure 4 is a perspective view of an injector provided with a fixing device according to a second embodiment of the invention.
  • Figure 5 is a perspective view of an injector provided with a fixing device according to a third embodiment.
  • the reference 1 designates a fuel injector fixed to a cylinder head 2 of an internal combustion engine.
  • the injector 1 has its lower end part held in abutment, by a flange 3, on an internal face 2a of the cylinder head 2 perpendicular to the longitudinal axis of the injector 1 and constituting the bottom of a cylindrical housing 2b of the cylinder head 2 for receiving a cylindrical part 4 of the body of the injector 1.
  • a non-elastic sealing washer made of copper R is interposed between the end part 1a and the internal face 2a of the cylinder head 2 .
  • the flange 3 is fixed to the cylinder head by two fixing screws 5 passing perpendicularly across the face 2c of the cylinder head 2, perpendicular to the longitudinal axis of the injector 1, and onto which the cylindrical housing 2b opens.
  • the flange 3 is spaced from the face 2c above the latter.
  • the cylindrical portion of the cylindrical part 4 of the body of the injector 1 situated above the face 2c of the cylinder head 2 and outside of it comprises a recess 6 opening onto the periphery of this cylindrical portion and constituted by a peripheral groove forming a circular support zone for an intermediate part 7 consisting of a split ring or rod of elastic metal mounted in the peripheral groove 6 by partially projecting therefrom.
  • the flange 3 comprises at its lower part a circular base 3a facing the face 2c and coming to bear on the projecting part of the rod 7.
  • This support base 3a may include a chamfer 3b coming into contact on the corresponding projecting part rod 7.
  • the flange 3 can be made of cast iron with inside the passage hole 3c of the cylindrical part 4, of the injector 1 and the two symmetrical wings 3d of which are crossed respectively by the two fixing screws 5 of the flange 3.
  • the flange 3 is firstly mounted on the injector and positioned above the groove 6 of the cylindrical part 4. Next, the rod 7 is slid over the cylindrical part 4 of the body of the injector 1 until engage in the receiving groove 6. Finally, the flange 3 is lowered with the injector until it comes to bear on the projecting part of the rod 7 and is fixed to the cylinder head 2 by the fixing screws 5 so maintaining the injector 1 in partial engagement in the cylindrical housing 2b of the cylinder head 2.
  • the support base 3a of the flange 3 is formed by two bosses which, instead of being directly supported respectively on the two corresponding projecting parts of the rod 7, are supported on two diametrically opposite zones of a ring 8 interposed between the ring 7 and the flange 3.
  • the two bosses 3a could alternatively be directly supported on the ring 7.
  • the ring 8 may include a circular chamfer internal (not shown) contacting the corresponding circular part of the rod 7.
  • the two opposite bosses 3a of the flange 3 are applied respectively on two diametrically opposite support zones of the injector 1 each produced in a radial recess consisting of a blind hole (not shown) receiving a lug 9 serving to support the corresponding boss 3a.
  • the fixing device reconciles a reduced size and a good elastic recovery of the forces resulting from different thermal expansions of the injector and of the cylinder head, in particular thanks to the use of the two relatively long screws for fixing the flange, thus ensuring good resistance with moderate tightening of the injector and excellent sealing since the sealing washer R no longer risks being crushed when the injector is tightened by the flange 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP96402173A 1995-11-17 1996-10-11 Anordnung zum Befestigen eines Kraftstoffeinspritzventils an den Zylinderkopf eines Verbrennungsmotors Expired - Lifetime EP0774579B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9513673A FR2741396B1 (fr) 1995-11-17 1995-11-17 Dispositif pour la fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne
FR9513673 1995-11-17

Publications (2)

Publication Number Publication Date
EP0774579A1 true EP0774579A1 (de) 1997-05-21
EP0774579B1 EP0774579B1 (de) 2002-01-23

Family

ID=9484685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402173A Expired - Lifetime EP0774579B1 (de) 1995-11-17 1996-10-11 Anordnung zum Befestigen eines Kraftstoffeinspritzventils an den Zylinderkopf eines Verbrennungsmotors

Country Status (4)

Country Link
EP (1) EP0774579B1 (de)
DE (1) DE69618748T2 (de)
ES (1) ES2170843T3 (de)
FR (1) FR2741396B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1134407A1 (de) 2000-03-15 2001-09-19 Bayerische Motoren Werke Aktiengesellschaft Befestigungs-Vorrichtung für eine Kraftstoff-Einspritzdüse in/an einer Brennkraftmaschine
FR2809458A1 (fr) * 2000-05-25 2001-11-30 Siemens Ag Dispositif de serrage permettant de serrer un injecteur dans un moteur a combustion interne
WO2003046365A1 (de) * 2001-11-13 2003-06-05 Robert Bosch Gmbh Einspannvorrichtung für ein kraftstoffeinspritzventil
EP1493916A1 (de) * 2003-07-02 2005-01-05 Renault s.a.s. Befestigungsbügel für Kraftstoffeinspritzventile von Brennkraftmaschinen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066213A (en) * 1976-04-16 1978-01-03 Deere & Company Fuel injection nozzle assembly
JPS5770952A (en) * 1980-10-20 1982-05-01 Honda Motor Co Ltd Fuel injection valve mounting device
WO1987000246A1 (en) * 1985-06-28 1987-01-15 Perkins Engines Shrewsbury Limited Fuel injector fastening
DE4315233A1 (de) * 1993-05-07 1994-07-28 Daimler Benz Ag Direkteinspritzende Brennkraftmaschine mit einem im Zylinderkopf zwischen Gaswechselventilen angeordneten Kraftstoffeinspritzventil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511703A1 (de) * 1995-03-30 1996-10-02 Bayerische Motoren Werke Ag Vorrichtung zur Befestigung einer Einspritzdüse insbesondere am Zylinderkopf einer Brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066213A (en) * 1976-04-16 1978-01-03 Deere & Company Fuel injection nozzle assembly
JPS5770952A (en) * 1980-10-20 1982-05-01 Honda Motor Co Ltd Fuel injection valve mounting device
WO1987000246A1 (en) * 1985-06-28 1987-01-15 Perkins Engines Shrewsbury Limited Fuel injector fastening
DE4315233A1 (de) * 1993-05-07 1994-07-28 Daimler Benz Ag Direkteinspritzende Brennkraftmaschine mit einem im Zylinderkopf zwischen Gaswechselventilen angeordneten Kraftstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 153 (M - 149)<1031> 13 August 1982 (1982-08-13) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1134407A1 (de) 2000-03-15 2001-09-19 Bayerische Motoren Werke Aktiengesellschaft Befestigungs-Vorrichtung für eine Kraftstoff-Einspritzdüse in/an einer Brennkraftmaschine
FR2809458A1 (fr) * 2000-05-25 2001-11-30 Siemens Ag Dispositif de serrage permettant de serrer un injecteur dans un moteur a combustion interne
WO2003046365A1 (de) * 2001-11-13 2003-06-05 Robert Bosch Gmbh Einspannvorrichtung für ein kraftstoffeinspritzventil
EP1493916A1 (de) * 2003-07-02 2005-01-05 Renault s.a.s. Befestigungsbügel für Kraftstoffeinspritzventile von Brennkraftmaschinen

Also Published As

Publication number Publication date
EP0774579B1 (de) 2002-01-23
ES2170843T3 (es) 2002-08-16
FR2741396A1 (fr) 1997-05-23
DE69618748D1 (de) 2002-03-14
FR2741396B1 (fr) 1998-02-06
DE69618748T2 (de) 2002-08-22

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