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EP1366284A1 - Dispositif d'etancheite pour soupape d'injection de carburant - Google Patents

Dispositif d'etancheite pour soupape d'injection de carburant

Info

Publication number
EP1366284A1
EP1366284A1 EP02712799A EP02712799A EP1366284A1 EP 1366284 A1 EP1366284 A1 EP 1366284A1 EP 02712799 A EP02712799 A EP 02712799A EP 02712799 A EP02712799 A EP 02712799A EP 1366284 A1 EP1366284 A1 EP 1366284A1
Authority
EP
European Patent Office
Prior art keywords
sealing
sleeve
fuel injection
sealing device
injection valve
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
EP02712799A
Other languages
German (de)
English (en)
Other versions
EP1366284B1 (fr
Inventor
Ferdinand Reiter
Jens Pohlmann
Achim Besemer
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 EP1366284A1 publication Critical patent/EP1366284A1/fr
Application granted granted Critical
Publication of EP1366284B1 publication Critical patent/EP1366284B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • the invention relates to a sealing device according to the type of the main claim.
  • a fuel injection system which has a compensating element which consists of a support body which has a spherical support surface.
  • a fuel injector is supported via this compensating element in a receiving bore in a cylinder head.
  • In the annular gap between the receiving bore and the fuel injection valve there is a sealing ring in a groove of the fuel injection valve, which seals the annular gap from the combustion chamber. Since the fuel injection valve rests on the spherically shaped spherical cap surface with a support surface, the fuel injection valve can be mounted up to a certain angular deviation from the axis of the receiving bore and can be pressed firmly into the receiving bore by suitable means, for example a clamping claw.
  • a disadvantage of the fuel injection system known from DE 197 35 665 AI is that the geometry of the fuel injection valve must be changed to adapt to changed installation geometries in the cylinder head.
  • the seal acting in the radial direction requires a high degree of positional accuracy of the receiving bore and the outer geometry of the fuel injector relative to one another.
  • the sealing device according to the invention with the characterizing feature of the main claim has the advantage that an adaptation to different geometries is simple and the interface of the fuel injector to the adjacent component remains unchanged.
  • the sealing surface formed on the sealing sleeve in the axial direction enables simple machining of the corresponding surface of the cylinder head.
  • the possibility of influencing the surface pressure on the axial sealing surface is also advantageous, as a result of which component tolerances have a smaller effect.
  • the elastic sealing sleeve is also suitable for compensating position and angular tolerances.
  • the intermediate sleeve for generating the axial force on the sealing sleeve is also advantageous, as a result of which the external geometry of the fuel injector can be changed within a wide range using an inexpensive component.
  • Fig. 1 shows a schematic partial section through a first embodiment of an inventive
  • Fig. 2 shows a schematic section through a second embodiment of a sealing device according to the invention.
  • FIG. 1 A first embodiment is shown in FIG. 1.
  • the fuel injector 1 is sealed with a radially sealing sealing element 3 against a sealing sleeve 4.
  • the sealing sleeve 4 is acted upon by an intermediate sleeve 13 in the axial direction with a force which leads to the formation of a sealing surface pressure between the sealing sleeve 4 and the cylinder head 2.
  • the cylinder head 2 For receiving the fuel injection valve 1, the cylinder head 2 has a receiving opening 6, which has a shoulder in the direction of the combustion chamber of the internal combustion engine, which shoulder is designed as a contact surface 7 for the sealing sleeve 4.
  • the fuel injection valve 1 has at its downstream end a cylindrical nozzle body 8, into which a circumferential groove for receiving the sealing element 3 is made.
  • the sealing sleeve 4 has a hollow cylindrical section 9, the inner radial extent of which corresponds to the radial extent of the sealing element 3, so that the sealing sleeve 4 produces a sealing press connection with the sealing element 3.
  • On the upstream side of the sealing sleeve 4 is one arranged collar-shaped extension 10, the outer radial extension of which is greater than the inner radial extension of the shoulder in the receiving opening 6 of the cylinder head 2.
  • the collar-shaped extension 10 has a curvature 11 formed in the upstream direction. Towards the outer circumference, the arch 11 merges into an oppositely directed second arch, on the downstream side of which an axial sealing surface 12 is arranged. The axial sealing surface 12 forms a sealing seat with the contact surface 7 of the receiving opening 6.
  • the sealing sleeve 4 is pressed onto the contact surface 7 by an intermediate sleeve 13, which can also be pushed onto the nozzle body 8 of the fuel injection valve 1.
  • a pressing surface 14 is formed at the downstream end of the intermediate sleeve 13. It arises by folding the downstream end of the intermediate sleeve 13 between the outer radial extent of the
  • Sealing element 3 corresponds.
  • the intermediate sleeve 13 is supported on a circumferential oblique shoulder 15 of the fuel injector 1.
  • the intermediate sleeve 13 is via a housing part 16 of the
  • Fuel injector 1 pushed.
  • the axial and radial expansion of the circumferential curvature 11 of the sealing sleeve 4 are so large that the curvature 11 is supported on the pressing surface 14 formed by the intermediate sleeve 13.
  • the curvature 11 of the sealing sleeve 4 is shaped such that the axial sealing surface 12 is the only contact surface of the sealing sleeve 4 with the contact surface 7 of the receiving opening 6.
  • the intermediate sleeve 13 transmits at least part of the axial force, which is exerted on the fuel injection valve 1 by a fastening means, not shown, to the curvature 11 of the sealing sleeve 4 and thus to the axial sealing surface 12 Intermediate sleeve 13 and the cylinder head 2 clamped sealing sleeve 4 elastically deformed.
  • the tension thus built up in the sealing sleeve 4 makes it possible to compensate for component tolerances without reducing the sealing effect.
  • a clamping claw can be used as a fastening element, for example, which presses the fuel injection valve 1 against the cylinder head 2 with a flange 5 provided for this purpose.
  • the axial distance between the downstream side of the flange 5 and the sealing surface of the sealing sleeve 4 in the unloaded state is greater than the distance between the corresponding contact surface, so that a tension is always built up in the sealing sleeve 4 when the fuel injector 1 is installed in the cylinder head 2, which generates the sealing surface pressure of the sealing surface 12 on the contact surface 7.
  • the intermediate sleeve 13 is first pushed onto the fuel injection valve 1. Subsequently, the sealing sleeve 4 is pushed onto the fuel injector 1, whereby the intermediate sleeve 13 is held on the fuel injector 1.
  • the forces designed to build up a sufficient sealing effect between the sealing element 3 and the sealing sleeve 4 are large enough to be able to use the sealing sleeve 4 as an assembly aid when inserting the fuel injection valve 1.
  • FIG. 2 A second exemplary embodiment with a modified form of the intermediate sleeve 13 is shown in FIG. 2.
  • the intermediate sleeve 13 is shortened and does not include the housing part 16 of the fuel injector 1, but is supported on its downstream side.
  • the shortened design of the intermediate sleeve 13 enables improved dissipation of the heat introduced.
  • the direct connection of the sealing sleeve 4 to the nozzle body 8 and the cylinder head 2 ensures good heat dissipation into the cylinder head 2 during operation of the internal combustion engine.
  • the sealing sleeve 4 is preferably made of spring-elastic, low-alloy stainless steel, spring-hard CuSn6 or CuBe2. With the choice of the material used, an adaptation of the sealing sleeve 4 with regard to the mechanical properties as well as the corrosion resistance and the heat dissipation to the corresponding application can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un dispositif d'étanchéité pour étanchéifier une soupape d'injection de carburant (1) pour des systèmes d'injection de carburant de moteurs à combustion vis-à-vis d'une culasse de cylindre (2). La soupape d'injection de carburant (1) présente un corps d'ajutage (8) sur lequel est monté un élément d'étanchéité (3) comportant une surface d'étanchéité orientée dans le sens radial vers l'extérieur. Ledit dispositif d'étanchéité comprend un manchon d'étanchéité (4) pouvant être emboîté sur l'élément d'étanchéité (3) et présente un évasement (10) en forme de collet comportant une surface d'étanchéité (12) orientée dans le sens radial, qui est en contact hermétique avec une surface d'appui (7) dans la culasse de cylindre (2).
EP02712799A 2001-02-21 2002-02-21 Dispositif d'etancheite pour soupape d'injection de carburant Expired - Lifetime EP1366284B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10108194 2001-02-21
DE10108194A DE10108194A1 (de) 2001-02-21 2001-02-21 Dichtvorrichtung für ein Brennstoffeinspritzventil
PCT/DE2002/000624 WO2002066819A1 (fr) 2001-02-21 2002-02-21 Dispositif d"etancheite pour soupape d"injection de carburant

Publications (2)

Publication Number Publication Date
EP1366284A1 true EP1366284A1 (fr) 2003-12-03
EP1366284B1 EP1366284B1 (fr) 2004-08-11

Family

ID=7674897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02712799A Expired - Lifetime EP1366284B1 (fr) 2001-02-21 2002-02-21 Dispositif d'etancheite pour soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US6892707B2 (fr)
EP (1) EP1366284B1 (fr)
JP (1) JP2004518850A (fr)
KR (1) KR20020087491A (fr)
CZ (1) CZ20023424A3 (fr)
DE (2) DE10108194A1 (fr)
WO (1) WO2002066819A1 (fr)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4089577B2 (ja) * 2003-09-25 2008-05-28 トヨタ自動車株式会社 筒内噴射用インジェクタ
DE10345965A1 (de) * 2003-10-02 2005-07-07 Parker Hannifin Gmbh Brennstoffeinspritzventil
FR2862717B1 (fr) * 2003-11-21 2006-04-07 Renault Sas Agencement pour l'etancheite entre un porte-injecteur et une culasse de vehicule automobile
DE10358913A1 (de) * 2003-12-16 2005-09-01 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004049277A1 (de) * 2004-10-09 2006-04-13 Robert Bosch Gmbh Dämpfungselement für ein Brennstoffeinspritzventil
FR2878582B1 (fr) * 2004-11-30 2007-04-27 Renault Sas Moteur comprenant un joint interpose entre la culasse et chaque buse d'injection
DE102005006818A1 (de) * 2005-02-15 2006-08-17 Volkswagen Mechatronic Gmbh & Co. Kg Dichtungseinrichtung für einen Kraftstoffinjektor sowie Verfahren zum Abdichten
JP4512018B2 (ja) * 2005-09-28 2010-07-28 株式会社ケーヒン 電動モータのスロットルボディへの取り付け構造
JP5003934B2 (ja) * 2006-09-07 2012-08-22 内山工業株式会社 ガスケット
US7513242B2 (en) * 2007-05-03 2009-04-07 Cummins Inc. Fuel injector assembly with injector seal retention
KR100931144B1 (ko) * 2007-12-14 2009-12-11 현대자동차주식회사 인젝터의 컷오프 솔레노이드밸브
DE602008003891D1 (de) * 2008-02-15 2011-01-20 Continental Automotive Gmbh Kraftstoffeinspritzdüse
DE102009000285A1 (de) * 2009-01-19 2010-07-22 Robert Bosch Gmbh Kraftstoff-Injektor sowie Brennkraftmaschine mit Kraftstoff-Injektor
US8230838B2 (en) * 2009-09-23 2012-07-31 Cummins Intellectual Properties, Inc. Injector seal assembly and method of sealing a coolant passage from an injector
US9382887B2 (en) 2009-09-23 2016-07-05 Cummins Intellectual Property. Inc. Engine component seal assembly and method of sealing a coolant passage from an engine component
US8763588B2 (en) * 2010-03-30 2014-07-01 Toyota Jidosha Kabushiki Kaisha Vibration insulator for fuel injection valve, and support structure for fuel injection valve
US20110265767A1 (en) * 2010-05-03 2011-11-03 Delphi Technologies, Inc. Isolater for fuel injector
WO2012021709A1 (fr) * 2010-08-11 2012-02-16 Cummins Intellectual Properties, Inc Moteur avec agencement de montage d'injecteur et de refroidissement
JP5270714B2 (ja) * 2011-04-27 2013-08-21 トヨタ自動車株式会社 燃料噴射弁用制振インシュレータ
DE102012219654A1 (de) * 2012-10-26 2014-04-30 Robert Bosch Gmbh Kraftstoffinjektor
DE102013212321A1 (de) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Kraftstoffinjektor
US9410520B2 (en) * 2013-08-08 2016-08-09 Cummins Inc. Internal combustion engine including an injector combustion seal positioned between a fuel injector and an engine body
US10036355B2 (en) 2013-08-08 2018-07-31 Cummins Inc. Heat transferring fuel injector combustion seal with load bearing capability
DE102014225988A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Entkopplungselement für eine Brennstoffeinspritzvorrichtung
DE102015225055A1 (de) * 2015-12-14 2017-06-14 Robert Bosch Gmbh Kraftstoffinjektor
US11192210B2 (en) 2016-10-31 2021-12-07 Cummins Inc. Injector sleeve assembly and method for field repair procedure
JP2018172972A (ja) * 2017-03-31 2018-11-08 本田技研工業株式会社 燃料噴射弁の取付構造
US11136953B2 (en) 2018-11-20 2021-10-05 Delphi Technologies Ip Limited Fuel injector with a locating pin, internal combustion engine using the same, and method
US10767613B2 (en) * 2018-11-20 2020-09-08 Delphia Technologies Ip Limited Fuel injector with locating pins, internal combustion engine using the same, and method
TR201820243A2 (tr) * 2018-12-24 2020-07-21 Bosch Sanayi Ve Tic A S Bir Yakıt Enjektörüne Yönelik bir Nozul Ünitesi, Yakıt Enjektörü Ve Aynı Zamanda Bir Nozul Ünitesinin Üretilmesine Yönelik Yöntem

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Also Published As

Publication number Publication date
JP2004518850A (ja) 2004-06-24
CZ20023424A3 (cs) 2004-04-14
US6892707B2 (en) 2005-05-17
EP1366284B1 (fr) 2004-08-11
DE10108194A1 (de) 2002-08-29
DE50200816D1 (de) 2004-09-16
WO2002066819A1 (fr) 2002-08-29
US20040060544A1 (en) 2004-04-01
KR20020087491A (ko) 2002-11-22

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