EP0970307B1 - Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne, et un procede de montage de cet injecteur - Google Patents

Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne, et un procede de montage de cet injecteur Download PDF

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Publication number
EP0970307B1
EP0970307B1 EP98922907A EP98922907A EP0970307B1 EP 0970307 B1 EP0970307 B1 EP 0970307B1 EP 98922907 A EP98922907 A EP 98922907A EP 98922907 A EP98922907 A EP 98922907A EP 0970307 B1 EP0970307 B1 EP 0970307B1
Authority
EP
European Patent Office
Prior art keywords
injector
cylinder head
fork
wings
cam
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
EP98922907A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0970307A1 (fr
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 EP0970307A1 publication Critical patent/EP0970307A1/fr
Application granted granted Critical
Publication of EP0970307B1 publication Critical patent/EP0970307B1/fr
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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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 on an internal combustion engine cylinder head, and a method of mounting this injector.
  • the invention relates to a device for attachment for an injector passing through the cylinder head and emerging from the latter by a lower face covering a cylinder of the supposedly vertical engine, and projecting from the cylinder head by an accessible upper face.
  • Such a device requires relatively sealing means complex, expensive and disassembly of the injector which is difficult, in especially when the cylinder head is fitted with a through camshaft its upper part.
  • document DE-A-19646920 discloses a device for fixing a fuel injector to the cylinder head of an engine, consisting a fork with two branches in which the fork is arranged in the room under a camshaft extending perpendicular to this shaft and is fixed by two screws to the cylinder head.
  • the object of the present invention is to propose a device of the kind of that described above and which overcomes the aforementioned drawbacks.
  • the present invention relates to a motor with internal combustion including a cylinder head, a camshaft holder which rests on an upper face of the cylinder head delimiting with this face a chamber containing mechanical actuators for valves, a fuel injector passing through the camshaft holder and the cylinder head while being held in abutment on the bottom of a well of the cylinder head by a fixing device comprising a fork which has two branches, said fork being arranged in the chamber under a tree with cams extending perpendicular to this shaft fixed by a screw the cylinder head, characterized in that the injector is provided with two wings symmetrically arranged on the periphery of the injector body and substantially equidistant from its ends and the two branches of the fork rest on the wings of the injector.
  • FIG. 1 shows the upper part of a diesel engine direct injection, consisting of a cylinder head 1 comprising on the one hand a horizontal underside 2, considering the figure, suitable for covering an engine cylinder block and on the other hand an upper face 3 on which rests a camshaft holder 4 fixed to the cylinder head 1 by fixing screw 5.
  • the camshaft holder 4 serves as a bearing for at least one camshaft cams 6 arranged above the upper face 3 of the cylinder head and in a cavity 7 of the camshaft holder 4 which constitutes part of a chamber 8 delimited between the latter and the cylinder head, and containing mechanical control devices for conventional valves.
  • a cover 9 -or cylinder head cover- is arranged on an upper face 10 of the camshaft holder.
  • the camshaft holder 4 is provided with a bore 11 for the passage, along a vertical axis, of the body of a fuel injector 12 generally cylindrical.
  • the body 12 of the injector is provided on the one hand with a portion lower 13 housed in a recess 14 said well formed in the cylinder head 1 and on the other hand an upper portion 15 which forms the head of the injector and protruding from the cover in an accessible manner.
  • This injector body 12 has at its lower part 13 a radial shoulder 16 which conventionally takes support, with interposition a sealing washer 17 made of copper, against the bottom 18 of the well.
  • the injector 12 is fixed to the cylinder head 1 to using a fork 20 with two branches 20a, 20b which are supported by on either side of the injector body 12 on two radial wings 21,22 arranged symmetrically on the periphery of the body 12 of the injector and extending, in the position of use, perpendicular to the branches.
  • the space delimited by the branches 20a, 20b is sufficient to allow the passage, during assembly, of the wings 21, 22 oriented parallel to the branches.
  • the wings 21, 22 are arranged on the body 12 of the injector substantially equidistant from its ends 15,13, which allows reduce buckling of the body when it is compressed axially by tightening the fork.
  • the fork 20 is supported at its end 23 opposite the branches, as visible in FIG. 2, on a stud 24 which is housed, by hooping, in a counterbore 25 produced in the upper face 3 of the breech thus avoiding the matting thereof when tightening the device.
  • This fork 20 is crossed substantially at its center by a fixing screw 26 for applying the fork legs to the wings 21,22 and thus maintain the body 12 of the injector on the cylinder head 1.
  • a spherical washer 27 is interposed between the head of the screw 26 and the fork 20.
  • This washer has a frustoconical face 28 which cooperates with a tapered bore 34 made on the fork so as to ensure good coaxiality between the screw 26 and the hole of the fork, as shown in figure 2.
  • the body 12 of the injector has between its head 15 and the wings 21.22 a wide cylindrical section 12a received in a sealed manner, thanks to annular seals 29.30, in the bore 11 of the camshaft holder.
  • the diameter D of this bore and of the section 12a is greater than the dimension between the ends of the wings so as to allow the passage of these during assembly of the injector.
  • Attaching the injector to cylinder head 1 using fork 20 is carried out as follows: the fork 20 and its screw 26 as well as the camshaft holders 4 and the mechanical control members valves are previously assembled on the cylinder head.
  • the operator engages the body 12 of the injector in the bore 11 of the camshaft holder 4, by arranging the axis median Q of the wings 21,22 parallel to the branches, as visible on Figures 3 and 4, until the injector is resting on the bottom 18 of the well 14, the wings 21, 22 then being under the fork.
  • the operator then performs, via the head of the injector 15 a rotation of about a quarter of a turn, as visible on the Figure 5, to the body 12 of the latter so as to have the median axis Q wings 21, 22 perpendicular to the branches 20a, 20b.
  • This conduit 31 is subsequently closed by a plug 32 or any other equivalent means ensuring a seal.
  • the operator covers the camshaft holder 4 with the cover 5.
  • the well 14 of the injector is formed of a tube fixed to the cylinder head, for example by shrinking, crossing a coolant chamber 33, produced in the cylinder head 1, thus ensuring the lower portion 13 of the body 12 of the injector a good heat exchange with this liquid.
  • the advantage of such a device according to the invention is that it has a reduced space requirement in the room, as shown in Figure 2, in particular thanks to the arrangement of the fork 20 coming to be housed under a camshaft perpendicular to it, and to ensure a maintenance stable injector with maximum reduction of buckling harmful to reliability of the injector.
  • this arrangement allows, while being simple to perform and inexpensive, very easy assembly and disassembly of the injector requiring the handling of only a limited number of components the environment of the injector.

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)
EP98922907A 1997-05-20 1998-04-30 Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne, et un procede de montage de cet injecteur Expired - Lifetime EP0970307B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9706112A FR2763649B1 (fr) 1997-05-20 1997-05-20 Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne, et un procede de montage de cet injecteur
FR9706112 1997-05-20
PCT/FR1998/000874 WO1998053197A1 (fr) 1997-05-20 1998-04-30 Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne, et un procede de montage de cet injecteur

Publications (2)

Publication Number Publication Date
EP0970307A1 EP0970307A1 (fr) 2000-01-12
EP0970307B1 true EP0970307B1 (fr) 2003-05-28

Family

ID=9507019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98922907A Expired - Lifetime EP0970307B1 (fr) 1997-05-20 1998-04-30 Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne, et un procede de montage de cet injecteur

Country Status (9)

Country Link
US (1) US6170467B1 (es)
EP (1) EP0970307B1 (es)
JP (1) JP4022264B2 (es)
CN (1) CN1085301C (es)
BR (1) BR9804900A (es)
DE (1) DE69815084T2 (es)
ES (1) ES2199442T3 (es)
FR (1) FR2763649B1 (es)
WO (1) WO1998053197A1 (es)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10032003A1 (de) * 2000-06-30 2002-01-10 Fev Motorentech Gmbh Kolbenbrennkraftmaschine mit biegesteifem Joch zur abdichtenden Befestigung von Kraftstoffeinspritzeinrichtungen
DE10108190A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Niederhalteblech zur Befestigung eines Brennstoffeinspritzventils
DE10109408A1 (de) 2001-02-28 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung
US6431152B1 (en) * 2001-03-30 2002-08-13 International Engine Intellectual Property Company, L.L.C. Injector hold down clamp
US7347189B2 (en) * 2003-02-19 2008-03-25 International Engine Intellectual Property Company, Llc Fuel injector clamp with retaining sleeve
JP4114601B2 (ja) * 2003-12-08 2008-07-09 日産自動車株式会社 燃料噴射ノズルの固定構造
FR2867520B1 (fr) * 2004-03-09 2006-05-05 Renault Sas Moteur a combustion interne comportant une enceinte pour le confinement de fuites de carburant
FR2904059B1 (fr) * 2006-07-21 2010-06-18 Peugeot Citroen Automobiles Sa Fourchette de maintien d'un porte-injecteur de moteur thermique.
EP1887215A1 (en) 2006-08-01 2008-02-13 Siemens Aktiengesellschaft Clamping device and cylinder head arrangement
EP1884657B1 (en) * 2006-08-04 2009-07-15 Continental Automotive GmbH Fixing device for fixing a fuel injector in a cylinder head of a combustion engine
US7849682B2 (en) * 2006-08-31 2010-12-14 Caterpillar Inc Exhaust treatment device having a fuel powered burner
CN101063433B (zh) * 2007-05-11 2010-06-09 北汽福田汽车股份有限公司 一种发动机喷油器的固定装置及具有该固定装置的发动机
FR2921005B1 (fr) * 2007-09-14 2009-10-30 Renault Sas Agencement pour la fixation par frettage d'un tube-injecteur dans une culasse.
DE102011002996A1 (de) 2011-01-21 2012-07-26 Robert Bosch Gmbh Kraftstoffeinspritzventil mit verbessertem Hochdruckanschluss
EP2703622B1 (en) * 2012-08-31 2014-12-31 Caterpillar Motoren GmbH & Co. KG Cylinder head with sensor sleeve
DE102013212321A1 (de) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Kraftstoffinjektor
CN103603740A (zh) * 2013-11-26 2014-02-26 广西玉柴机器股份有限公司 柴油机气缸盖
KR101611085B1 (ko) * 2014-10-16 2016-04-11 현대자동차주식회사 차량용 캠캐리어 모듈
DE102020004625A1 (de) 2020-07-30 2022-02-03 Deutz Aktiengesellschaft lnjektorverpratzung
US11898516B2 (en) 2021-08-25 2024-02-13 Caterpillar Inc. Cylinder head having bore locations arranged for tight packaging of gas exchange and fuel system components
US11644000B2 (en) * 2021-08-25 2023-05-09 Caterpillar Inc. Fuel injector clamp assembly for offset clamping bolt and cylinder head assembly with same
US11603817B1 (en) 2021-08-25 2023-03-14 Caterpillar Inc. Slim-profile fuel injector for tight packaging in top feed fuel system
US11608804B1 (en) 2021-08-25 2023-03-21 Caterpillar Inc. Fuel injector having side-fitted fuel connector for tight packaging in top-feed fuel system
JP2023044793A (ja) * 2021-09-21 2023-04-03 いすゞ自動車株式会社 インジェクタの固定構造及びインジェクタの引き抜き方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315233A1 (de) * 1993-05-07 1994-07-28 Daimler Benz Ag Direkteinspritzende Brennkraftmaschine mit einem im Zylinderkopf zwischen Gaswechselventilen angeordneten Kraftstoffeinspritzventil
US5697345A (en) * 1994-12-28 1997-12-16 Cummins Engine Company, Inc. Clamping load distributor for a fuel injector
US5566658A (en) * 1995-04-21 1996-10-22 Cummins Engine Company, Inc. Clamping load distributor and top stop for a fuel injector
JP3687758B2 (ja) * 1995-11-14 2005-08-24 株式会社デンソー 燃料噴射装置
JP3134797B2 (ja) * 1996-11-15 2001-02-13 いすゞ自動車株式会社 エンジンのインジェクタ取付構造
JP2877117B2 (ja) * 1996-12-13 1999-03-31 いすゞ自動車株式会社 直噴式多気筒エンジン

Also Published As

Publication number Publication date
US6170467B1 (en) 2001-01-09
FR2763649B1 (fr) 1999-06-25
EP0970307A1 (fr) 2000-01-12
FR2763649A1 (fr) 1998-11-27
BR9804900A (pt) 1999-08-31
CN1085301C (zh) 2002-05-22
CN1226951A (zh) 1999-08-25
DE69815084D1 (de) 2003-07-03
JP4022264B2 (ja) 2007-12-12
DE69815084T2 (de) 2004-02-19
ES2199442T3 (es) 2004-02-16
WO1998053197A1 (fr) 1998-11-26
JP2000515610A (ja) 2000-11-21

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