EP2199592B1 - Befestigungsvorrichtung zum Befestigen einer Kraftstoffeinspritzdüse in einem Zylinderkopf eines Verbrennungsmotors - Google Patents

Befestigungsvorrichtung zum Befestigen einer Kraftstoffeinspritzdüse in einem Zylinderkopf eines Verbrennungsmotors Download PDF

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Publication number
EP2199592B1
EP2199592B1 EP10001914A EP10001914A EP2199592B1 EP 2199592 B1 EP2199592 B1 EP 2199592B1 EP 10001914 A EP10001914 A EP 10001914A EP 10001914 A EP10001914 A EP 10001914A EP 2199592 B1 EP2199592 B1 EP 2199592B1
Authority
EP
European Patent Office
Prior art keywords
fuel injector
tubular portion
fixing device
axial end
cylinder head
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
EP10001914A
Other languages
English (en)
French (fr)
Other versions
EP2199592A1 (de
Inventor
Mario D'onofrio
Gianbattista Fischetti
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
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Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2199592A1 publication Critical patent/EP2199592A1/de
Application granted granted Critical
Publication of EP2199592B1 publication Critical patent/EP2199592B1/de
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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
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting

Definitions

  • the invention relates to a fixing device for fixing a fuel injector in a cylinder head of a combustion engine according to the preamble of claim 1 and to a fuel injector.
  • Fuel injectors are in wide spread use, in particular for internal combustion engines where they may be arranged in order to dose fuel into an intake manifold of the internal combustion engine or directly into the combustion chamber of a cylinder of the internal combustion engine. Fuel can be supplied to the internal combustion engine by the fuel injector that comprises the fixing device. The fuel injectors can be coupled to the cylinder head of the internal combustion engine in different manners.
  • the coupling of the fuel injectors to the cylinder heads needs to be very precise to get a correct injection angle.
  • the object of the invention is to create a fixing device for fixing a fuel injector in a cylinder head of a combustion engine which is simply to be manufactured and which facilitates a reliable and precise coupling between the fuel injector and the cylinder head of the combustion engine.
  • the invention is distinguished by a fuel injector comprising a respective fixing device.
  • Figure 1 shows an internal combustion engine 22, with an intake air tract 10, a motor block 12, a cylinder head 14 and an exhaust gas tract 16.
  • a combustion chamber 20 is arranged in the motor block 12 .
  • the cylinder head 14 comprises a fuel injector 18 and a sparking plug 19.
  • a fixing device 30 enables the fixing of the fuel injector 18 to the cylinder head 14 of the combustion engine 22.
  • the fuel injector 18 ( figure 2 ) comprises an injector coupling portion 24 and a valve assembly 27.
  • the injector coupling portion 24 is designed to be coupled to a high-pressure fuel chamber of the internal combustion engine 22, the fuel is stored under high pressure, for example, under the pressure of about 200 bar in the case of a gasoline engine or of about 2,000 bar in the case of a diesel engine.
  • the injector coupling portion 24 is designed to be coupled to an electrical supply to actuate a not shown actuator unit of the fuel injector 18.
  • the valve assembly 27 comprises a valve body 26 with a central longitudinal axis L and a not shown cavity which is axially led through the valve body 26.
  • the valve assembly 27 further comprises a not shown valve needle taken in the cavity of the valve body 26.
  • the first axial end 44 of the fixing device 30 is circumferentially closed. With this it is possible to rigidly fix the fixing device 32 to the fuel injector 18 over the whole circumference of the fuel injector 18 via the first axial end 44. This enables a very strong coupling between the fuel injector 18 and the fixing device 30.
  • the tubular portion 32 is formed from a panel 60 which comprises a first portion 62 and a second portion 64 and two projections 34.
  • the first portion 62 is of a non-rectangular parallelogram shape with the first axial end 44 and the second axial end 46 of the tubular portion 32 and a first lateral end 68 and a second lateral end 70 of the tubular portion 32.
  • the second portion 64 of the panel 60 has a triangular shape and is arranged at the second lateral end 70 of the tubular portion 32.
  • the second axial end 46 of the tubular portion 32 and the second lateral end 70 of the first portion of the tubular portion 32 form an angle BETA.
  • the first portion 62, the second portion 64 and the two projections 34 of the panel 60 are forming a one-piece element.
  • the triangular shaped second portion 64 of the panel 60 is arranged to directly follow one of the projections 34 in the direction of the retaining force F.
  • the second portion 64 of the panel 60 is directly followed by the parallelogram shaped first portion 62 of the panel 60.
  • the construction of the tubular portion 32 allows a continuous welding seam of the first axial end 44 of the tubular portion 32 to the fuel injector 18.
  • the second portion 64 of the tubular portion 32 is directly following one of the projections 34 in the direction of the retaining force F a very robust construction of the fixing device 30 against mechanical stress due to a permanent retaining force F can be obtained. Therefore, an introduction of the retaining force F via the projections 34 into the first axial end 44 of the tubular portion 32 causes only small mechanical stress exerted on the first axial end 44.
  • the angle BETA between the second axial end 46 of the tubular portion 32 and the second lateral end 70 of the first portion of the tubular portion 32 is about 60°.
  • the second portion 64 of the tubular portion 32 is large enough to transfer the retaining force F from the projection 34 to the first portion 62 of the tubular portion 32 thereby allowing a good distribution of the mechanical load.
  • FIG. 5 shows another embodiment of the fixing device 30, wherein each of the projections 34 comprises one of the force receiving elements 36 and one of the supporting elements 38.
  • the fuel injector 18 is inserted into the fixing device 30.
  • the fixing device 30 is clamped together.
  • the first axial end 44 and the second axial end 46 of the tubular portion 32 are in contact with the outer surface 42 of the fuel injector 18 thereby enabling a fixed coupling of the fixing device 30 to the fuel injector 18 preferably by welding.
  • the fuel injector 18 with the fixing device 30 is inserted into the recess 15 of the cylinder head 14 with the support of a protrusion which allows orienting the fuel injector 18 relative to the cylinder head 14. Additionally, a force exerting device is arranged in a way that it is in contact with the force receiving elements 36. Consequently, the retaining force F from the force exerting device is transmitted to the force receiving elements 36 and the supporting elements 38 or to the projections 34 of the fixing device 30. By this the fuel injector 18 can be fixed in a secure manner in the recess 15 of the cylinder head 14 even if large forces exert on the fuel injector 18 in opposite direction to the retaining force F.
  • the fixing device 30 is very robust against mechanical stress in particular in the area between the supporting elements 28 and the tubular portion 32 or the projections 34 and the tubular portion 32. By this a high lifetime of the fixing device 30 can be obtained.

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  • 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)

Claims (3)

  1. Befestigungsvorrichtung (30) zum Befestigen einer Kraftstoffeinspritzdüse (18) in einem Zylinderkopf (14) eines Verbrennungsmotors (22), umfassend
    • einen röhrenförmigen Abschnitt (32), der eine mittige Längsachse (L) beinhaltet, wobei der röhrenförmige Abschnitt (32) dazu konstruiert ist, die Kraftstoffeinspritzdüse (18) in Eingriff zu nehmen und starr an die Kraftstoffeinspritzdüse (18) gekoppelt zu sein, wobei der röhrenförmige Abschnitt (32) ein erstes axiales Ende (44) und ein zweites axiales Ende (46) umfasst, die dazu konstruiert sind, vollständig an der Kraftstoffeinspritzdüse (18) anbringbar zu sein, und
    • Vorsprünge (34), die in einem Stück mit dem röhrenförmigen Abschnitt (32) ausgebildet sind, an dem ersten axialen Ende (44) des röhrenförmigen Abschnitts (32) angeordnet sind und die dazu konstruiert sind, eine Haltekraft (F) zu empfangen, wobei die Haltekraft (F) in der Richtung der mittigen Längsachse (L) wirkt, um die Kraftstoffeinspritzdüse (18) in dem Zylinderkopf (14) zu halten,
    dadurch gekennzeichnet, dass der röhrenförmige Abschnitt (32) aus einem Blech (60) gebildet wird, das einen ersten Abschnitt (62) von nicht rechtwinkliger Parallelogrammform und einen zweiten Abschnitt (64) von dreieckiger Form in einem Stück mit dem ersten Abschnitt (62) umfasst, und der zweite Abschnitt derart (64) konstruiert ist, dass das erste axiale Ende (44) des röhrenförmigen Abschnitts (32) in Umfangsrichtung geschlossen ist.
  2. Befestigungsvorrichtung gemäß Anspruch 1, wobei der zweite Abschnitt (64) des röhrenförmigen Abschnitts (32) so angeordnet ist, dass er in der Richtung der Haltekraft (F) unmittelbar auf einen der Vorsprünge (34) folgt.
  3. Kraftstoffeinspritzdüse (18) umfassend eine Befestigungsvorrichtung (30) gemäß einem der vorhergehenden Ansprüche.
EP10001914A 2007-05-31 2007-05-31 Befestigungsvorrichtung zum Befestigen einer Kraftstoffeinspritzdüse in einem Zylinderkopf eines Verbrennungsmotors Active EP2199592B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070010814 EP1998038B1 (de) 2007-05-31 2007-05-31 Befestigungsvorrichtung zum Befestigen einer Kraftstoffeinspritzdüse in einem Zylinderkopf eines Verbrennungsmotors

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP07010814.7 Division 2007-05-31

Publications (2)

Publication Number Publication Date
EP2199592A1 EP2199592A1 (de) 2010-06-23
EP2199592B1 true EP2199592B1 (de) 2011-10-12

Family

ID=39106097

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20070010814 Active EP1998038B1 (de) 2007-05-31 2007-05-31 Befestigungsvorrichtung zum Befestigen einer Kraftstoffeinspritzdüse in einem Zylinderkopf eines Verbrennungsmotors
EP10001914A Active EP2199592B1 (de) 2007-05-31 2007-05-31 Befestigungsvorrichtung zum Befestigen einer Kraftstoffeinspritzdüse in einem Zylinderkopf eines Verbrennungsmotors

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20070010814 Active EP1998038B1 (de) 2007-05-31 2007-05-31 Befestigungsvorrichtung zum Befestigen einer Kraftstoffeinspritzdüse in einem Zylinderkopf eines Verbrennungsmotors

Country Status (2)

Country Link
EP (2) EP1998038B1 (de)
DE (1) DE602007007739D1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011075057A1 (de) * 2011-05-02 2012-11-08 Robert Bosch Gmbh Brennstoffverteiler und System mit einem Brennstoffeinspritzventil
EP2860388B1 (de) * 2013-10-10 2017-07-26 Continental Automotive GmbH Brennstoffeinspritzvorrichtung für einen Verbrennungsmotor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705990A1 (de) * 1997-02-17 1998-08-20 Bosch Gmbh Robert Montagevorrichtung zur Montage eines Brennstoffeinspritzventils
DE10108467A1 (de) * 2001-02-22 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung
DE10109408A1 (de) * 2001-02-28 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung
DE10151004A1 (de) 2001-10-16 2003-06-18 Volkswagen Ag Haltevorrichtung für Einspritzventile in einer Kraftstoffeinspritzanlage von Verbrennungsmotoren
EP1884657B1 (de) * 2006-08-04 2009-07-15 Continental Automotive GmbH Befestigungsvorrichtung zur Befestigung eines Brennstoffeinspritzventils an einem Zylinderkopf einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE602007007739D1 (de) 2010-08-26
EP1998038A1 (de) 2008-12-03
EP2199592A1 (de) 2010-06-23
EP1998038B1 (de) 2010-07-14

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