EP0918928B1 - Systeme d'injection de carburant - Google Patents

Systeme d'injection de carburant Download PDF

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Publication number
EP0918928B1
EP0918928B1 EP98925412A EP98925412A EP0918928B1 EP 0918928 B1 EP0918928 B1 EP 0918928B1 EP 98925412 A EP98925412 A EP 98925412A EP 98925412 A EP98925412 A EP 98925412A EP 0918928 B1 EP0918928 B1 EP 0918928B1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel injection
seal carrier
injection system
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.)
Expired - Lifetime
Application number
EP98925412A
Other languages
German (de)
English (en)
Other versions
EP0918928A1 (fr
Inventor
Thomas FÜRST
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 EP0918928A1 publication Critical patent/EP0918928A1/fr
Application granted granted Critical
Publication of EP0918928B1 publication Critical patent/EP0918928B1/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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down

Definitions

  • the invention relates to a fuel injection system for injecting fuel into an internal combustion engine, in particular for the direct injection of fuel into the Combustion chamber or the combustion chambers of the internal combustion engine.
  • the invention relates to a fuel injection system according to the genus Main claim. It is already known from JP-OS 08-312503 on the cylinder head an internal combustion engine receiving bores for one fuel injector each to provide each combustion chamber of the internal combustion engine, in each of which one Injection section of the associated fuel injector for direct injection of fuel can be used in the respective combustion chamber. That in the location hole of the cylinder head used fuel injector is by means of a clamp trained hold-down device against the prevailing in the combustion chamber relative hold down high combustion pressure.
  • the Fuel injectors in the receiving holes a relatively solid, immovable To have a seat.
  • the fuel distribution line has a receiving element for each fuel injector, in which the inlet section of the fuel injector is insertable, so that the Receiving element encloses the inlet section cup-like.
  • the inlet section of each fuel injector has Sealing element in the form of an O-ring on the inner wall of the Receiving element bears sealingly.
  • US 4,556,034 A shows a fuel injection system according to the Preamble of claim 1.
  • Fuel injection system greater tolerances in the manufacture of the cylinder head and the fuel distribution line, so that the manufacturing cost of these parts is reduced and the manufacturing costs are reduced accordingly.
  • the fuel distribution line can be mounted relatively close to the cylinder head, so that only a small installation space is needed.
  • connection area between the fuel rail and the inlet section the cross section of the fuel injection valves can be made relatively wide and short, so that no pressure drop occurs when the fuel injection valves are opened.
  • the radial one Sealing takes place in relation to an end face of the inlet section of the Fuel injector, while the axial seal against the Connection piece of the fuel distribution line takes place.
  • FIG. 1 shows the assembly of a Fuel injector and the connection to the fuel distribution line shown in section according to the prior art
  • Fig. 2 shows a section through Exemplary embodiment according to the invention in a partial representation of the Connection area between the fuel injector and the fuel rail.
  • FIG. 2 Before going into the embodiment of the invention shown in FIG. 2 in more detail is, first briefly with reference to Fig. 1, the usual assembly of the Fuel injection valve 1 on the cylinder head 2 of the not shown Internal combustion engine and the connection of the inlet section 3 of the Fuel injection valve 1 with the fuel distributor line shown in section in FIG. 1 4 are described.
  • the fuel injector 1 is attached to the cylinder head 2 by inserting it into a Fig. 1 cylinder head bore, not shown, mounted relatively rigid. There is for everyone Combustion chamber of the internal combustion engine is generally a fuel injection valve 1 intended. After inserting the fuel injectors I into the associated one
  • the fuel distribution line 4 is installed in the cylinder bores of the cylinder head 2, the to supply the fuel from a fuel pump, not shown, to the individual fuel injection valves 1 is used.
  • the inlet section 3 is each Fuel injection valve 1 in an associated connecting piece 5 of the fuel distribution line 4 used and provided on the inlet section 3 Sealing ring 6 sealed.
  • the inlet section 3 of the fuel injection valve 1 has a fuel inlet opening 14, which at the inlet end of the fuel injector 1 of one extending perpendicular to the longitudinal axis 15 of the fuel injector 1, i. H. radial aligned end face 16 is surrounded.
  • a fuel inlet opening 14 of the Fuel injector 1 closes a step-shaped fuel feed bore 17 on.
  • a bushing 18 can be inserted into the fuel inlet opening 14.
  • the bushing 18 forms, together with a seal carrier 20, an inventive one Connection device 18, 20 within a predetermined range of variation a position compensation between the position of the inlet section 3 of the Fuel injector 1 and the position of the connector 5 of the fuel rail 4 enables.
  • the radial displacement range c of the seal carrier 20 can be approximately 0.6 mm, while the axial play b of the seal carrier 20 can be between 0.05 mm and 0.1 mm.
  • the radial displacement range c is predetermined by the difference between the inner diameter d 2 of a through bore 22 of the annular seal carrier 20 and the outer diameter d 1 of a penetration section 23 of the bushing 18. The penetration section 23 penetrates the seal carrier 20 in the region of its through bore 22.

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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)

Claims (12)

  1. Installation d'injection de carburant pour injecter du carburant dans un moteur à combustion interne comprenant :
    au moins un injecteur (1) ayant un segment d'alimentation (3) avec un orifice d'entrée de carburant (14) et,
    une conduite de distribution de carburant (4) qui, pour chaque injecteur de carburant (1) comporte un orifice de sortie de carburant (10) destiné à être relié à l'orifice d'entrée de carburant (14) de l'injecteur (1) et un ajutage de liaison (15) relié en aval à l'orifice de sortie de carburant (10), alors que
    pour assurer la liaison étanche de l'orifice d'entrée de carburant (14), chaque injecteur (1) est muni d'un dispositif de liaison (18, 20) avec l'orifice de sortie de carburant (10) associé de la conduite de distribution de carburant (4), avec
    un support de joint (20) annulaire comportant un premier élément d'étanchéité (28) pour assurer l'étanchéité du support de joint (20) par rapport au segment d'alimentation (3) de l'injecteur (1) et un second élément d'étanchéité (32) pour assurer l'étanchéité du support de joint (20) par rapport à l'ajutage de liaison (5) de la conduite de distribution de carburant (4),
    caractérisée en ce que
    le dispositif de liaison est une douille (18) qui se place dans l'orifice d'entrée de carburant (14), et qui traverse le support de joint (20), annulaire, pour que ce support (20) soit tenu de manière mobile entre une collerette amont (21) de la douille (18) et le segment d'alimentation (3) de l'injecteur (1), avec mobilité dans la direction radiale.
  2. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le premier élément d'étanchéité (28) est guidé dans une première rainure annulaire (27) du support de joint (20), et est mobile en coulissement radial sur une surface frontale (16) du segment d'alimentation (3) de l'injecteur (1).
  3. Installation d'injection de carburant selon la revendication 2,
    caractérisée en ce que
    la première rainure annulaire (27) est réalisée dans la surface frontale (16) dirigée radialement, du support de joint (20), surface en aval, en regard de la surface frontale (16) du segment d'alimentation (3).
  4. Installation d'injection de carburant selon les revendications 2 ou 3,
    caractérisée en ce qu'
    un diamètre extérieur du support de joint (20) en amont du second élément d'étanchéité (32) est plus grand que le diamètre extérieur (33) de la première rainure annulaire (27).
  5. Installation d'injection de carburant selon l'une quelconque des revendications 1 à 4,
    caractérisée en ce que
    le second élément d'étanchéité (32) est guidé dans une seconde rainure annulaire (31) du support de joint (20) et est mobile en glissement axial sur une paroi (29) de l'ajutage de liaison (5) de la conduite de distribution de carburant (20).
  6. Installation d'injection de carburant selon la revendication 5,
    caractérisée en ce que
    la seconde rainure (31) est réalisée dans la surface enveloppe (30) du support de joint (20), dirigée axialement et qui se situe en regard de la paroi (29) de l'ajutage de liaison (5).
  7. Installation d'injection de carburant selon l'une quelconque des revendications 1 à 6,
    caractérisée en ce que
    la douille (18) comporte un perçage longitudinal (19) traversant pour le passage du carburant.
  8. Installation d'injection de carburant selon l'une quelconque des revendications 1 à 7,
    caractérisée en ce que
    le support de joint annulaire (20) comporte un perçage traversant (22) dans lequel passe un segment de passage (23) de la douille (18) et le diamètre intérieur (d2) du perçage traversant (22) du support de joint (20) est plus grand que le diamètre extérieur (d1) du segment (23) de la douille (18) qui traverse.
  9. Installation d'injection de carburant selon l'une quelconque des revendications 1 à 8,
    caractérisée en ce que
    la douille (18) est placée dans l'orifice d'entrée de carburant (14) de l'injecteur (1) de façon que le support de joint (20) soit mobile axialement entre la collerette amont (21) de la douille (18) et le segment d'alimentation (3) de l'injecteur (1), avec un jeu (b) prédéterminé.
  10. Installation d'injection de carburant selon l'une quelconque des revendications 1 à 9,
    caractérisée en ce que
    le dispositif de liaison (18, 20) peut être introduit dans l'ajutage de liaison (5) de la conduite de distribution de carburant (4).
  11. Installation d'injection de carburant selon l'une quelconque des revendications 1 à 10,
    caractérisée en ce que
    les éléments d'étanchéité (28, 32) sont des joints annulaires.
  12. Installation d'injection de carburant selon l'une quelconque des revendications 1 à 11,
    caractérisée en ce que
    la douille (18) est pressée dans l'orifice d'entrée de carburant (14) de l'injecteur (1).
EP98925412A 1997-06-13 1998-03-19 Systeme d'injection de carburant Expired - Lifetime EP0918928B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19725076A DE19725076A1 (de) 1997-06-13 1997-06-13 Brennstoffeinspritzanlage
DE19725076 1997-06-13
PCT/DE1998/000810 WO1998058169A1 (fr) 1997-06-13 1998-03-19 Systeme d'injection de carburant

Publications (2)

Publication Number Publication Date
EP0918928A1 EP0918928A1 (fr) 1999-06-02
EP0918928B1 true EP0918928B1 (fr) 2002-12-18

Family

ID=7832425

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98925412A Expired - Lifetime EP0918928B1 (fr) 1997-06-13 1998-03-19 Systeme d'injection de carburant

Country Status (7)

Country Link
US (1) US6102007A (fr)
EP (1) EP0918928B1 (fr)
JP (1) JP2000517028A (fr)
KR (1) KR20000068117A (fr)
AU (1) AU733211B2 (fr)
DE (2) DE19725076A1 (fr)
WO (1) WO1998058169A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105917110A (zh) * 2014-01-15 2016-08-31 罗伯特·博世有限公司 具有引导燃料的部件、燃料喷射阀和连接装置的燃料喷射设备

Families Citing this family (27)

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Publication number Priority date Publication date Assignee Title
DE19902186A1 (de) * 1999-01-21 2000-07-27 Bosch Gmbh Robert Brennstoffeinspritzvorrichtung
JP3802702B2 (ja) * 1999-02-26 2006-07-26 株式会社ケーヒン 電磁式燃料噴射弁におけるシール部材の取付け構造
US6314943B1 (en) * 1999-10-22 2001-11-13 Ford Global Technologies, Inc. Fuel supply rail with integrated fuel injector load spring
DE10056005A1 (de) 2000-11-11 2002-05-16 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE10056038A1 (de) 2000-11-11 2002-05-16 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE10103825A1 (de) * 2001-01-29 2002-08-08 Bosch Gmbh Robert Einspritzventil mit aufgesetzter Kraftstoffversorgung
US6418911B1 (en) * 2001-07-13 2002-07-16 Siemens Diesel Systems Technology Device and procedure for coupling a fluid rail with fuel injectors
DE10158788A1 (de) 2001-11-30 2003-06-12 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE10208227A1 (de) * 2002-02-26 2003-10-02 Bosch Gmbh Robert Brennstoffeinspritzanlage
JP3846337B2 (ja) * 2002-03-15 2006-11-15 株式会社デンソー インジェクタ固定方法およびインジェクタ固定装置
DE10240130A1 (de) 2002-08-30 2004-03-18 Robert Bosch Gmbh Steckverbindung für medienführende Leitungen
US6640784B1 (en) 2002-10-09 2003-11-04 Robert Bosch Corporation Spark ignition direct injection system
DE10360334A1 (de) * 2003-12-20 2005-07-14 Robert Bosch Gmbh Kraftstoffrücklaufsystem mit Drossel
DE10360335A1 (de) 2003-12-20 2005-07-14 Robert Bosch Gmbh Steckverbinder für Leistungssysteme mit variabler Schlauchführung
EP1548271B1 (fr) * 2003-12-22 2010-04-21 Continental Automotive GmbH Systeme d'injection de carburant
JP4546849B2 (ja) * 2005-02-14 2010-09-22 三桜工業株式会社 管体のシール構造
US20090013968A1 (en) * 2007-07-09 2009-01-15 Keegan Kevin R Vapor recovery system for a direct injector fuel rail assembly
DE102007035714A1 (de) 2007-07-30 2009-02-05 Robert Bosch Gmbh Brennstoff-Einspritzanlage mit Ausgleichselement
US7543567B2 (en) * 2007-10-29 2009-06-09 Caterpillar Inc. Fuel system having a one-piece hollow tube connection
EP2093413B1 (fr) * 2008-02-19 2011-01-12 Continental Automotive GmbH Dispositif de couplage
EP2093412B1 (fr) * 2008-02-19 2011-01-19 Continental Automotive GmbH Dispositif de couplage
EP2112367B1 (fr) * 2008-04-23 2011-09-14 Continental Automotive GmbH Agencement de couplage et injecteur de carburant
US20090321536A1 (en) * 2008-06-30 2009-12-31 Caterpillar Inc. Piston having channel extending through piston head
US7942132B2 (en) * 2008-07-17 2011-05-17 Robert Bosch Gmbh In-line noise filtering device for fuel system
EP2208883B1 (fr) * 2009-01-19 2015-07-22 Continental Automotive GmbH Dispositif de couplage
DE102012204310A1 (de) * 2012-03-19 2013-09-19 Robert Bosch Gmbh Dicht umspritztes Bauelement und Verfahren zum Herstellen eines solchen Bauelements
DE102017108270B4 (de) * 2017-04-19 2023-11-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Dichtungskassette für einen Injektor einer Verbrennungskraftmaschine und Injektoranordnung für eine Verbrennungskraftmaschine

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DE2416803A1 (de) * 1974-04-06 1975-10-16 Daimler Benz Ag Elektronisch gesteuerte benzin-einspritzanlage
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AU559746B2 (en) * 1981-11-04 1987-03-19 Honda Giken Kogyo Kabushiki Kaisha Injector mounting
US4445713A (en) * 1982-07-19 1984-05-01 Caterpillar Tractor Co. Bulkhead-fluid-line connector
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JPH08312503A (ja) * 1995-03-10 1996-11-26 Mitsubishi Motors Corp 固定対象物、特に筒内噴射型内燃機関用インジェクタの取付構造
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US5752487A (en) * 1997-06-11 1998-05-19 Caterpillar Inc. Injector combustion gas seal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105917110A (zh) * 2014-01-15 2016-08-31 罗伯特·博世有限公司 具有引导燃料的部件、燃料喷射阀和连接装置的燃料喷射设备
CN105917110B (zh) * 2014-01-15 2019-11-29 罗伯特·博世有限公司 具有引导燃料的部件、燃料喷射阀和连接装置的燃料喷射设备

Also Published As

Publication number Publication date
WO1998058169A1 (fr) 1998-12-23
US6102007A (en) 2000-08-15
JP2000517028A (ja) 2000-12-19
DE59806710D1 (de) 2003-01-30
AU7756198A (en) 1999-01-04
DE19725076A1 (de) 1998-12-17
KR20000068117A (ko) 2000-11-25
EP0918928A1 (fr) 1999-06-02
AU733211B2 (en) 2001-05-10

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