WO2004025113A1 - Dispositif d'injection de carburant pour moteur a combustion interne - Google Patents

Dispositif d'injection de carburant pour moteur a combustion interne Download PDF

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Publication number
WO2004025113A1
WO2004025113A1 PCT/EP2003/008869 EP0308869W WO2004025113A1 WO 2004025113 A1 WO2004025113 A1 WO 2004025113A1 EP 0308869 W EP0308869 W EP 0308869W WO 2004025113 A1 WO2004025113 A1 WO 2004025113A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
internal combustion
combustion engine
fuel injection
injector
Prior art date
Application number
PCT/EP2003/008869
Other languages
German (de)
English (en)
Inventor
Adolf Kremer
Wilhelm Mair
Original Assignee
Daimlerchrysler Ag
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 Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2004025113A1 publication Critical patent/WO2004025113A1/fr

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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws
    • 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
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • Fuel injection device for an internal combustion engine
  • the invention relates to a fuel injection device for an internal combustion engine according to the other features specified in the preamble of claim 1.
  • Such a fuel injection device is known from DE 34 28 597 AI.
  • a U-shaped spring clip is used to hold the fuel injector on the connection piece of the fuel distributor, by means of which the fuel injector is essentially rigidly coupled to the connection piece.
  • the invention has for its object to develop the known fuel injection device such that at attached to the internal combustion engine, the individual fuel injectors can be held on the internal combustion engine with a predetermined preload force that is as equal as possible, regardless of manufacturing tolerances.
  • the object is achieved in that the at least one fuel injector held axially displaceably on the connecting piece is held in contact with a component of the internal combustion engine only via the form spring as a hold-down device.
  • the solution according to the invention advantageously ensures that the fuel injector can be braced against a component of the internal combustion engine independently of the fastening of the fuel distributor.
  • the form spring as a pressing means for the fuel injector, production-related differences in length between the injector and, for example, the cylinder head can be compensated, so that the fuel injector and all other injectors are clamped against a component, such as the cylinder head of the internal combustion engine, essentially with the same pretensioning force.
  • the shaped spring is fork-shaped with two spring tongues, the spring base, from which the spring tongues extend, being fastened to the fuel rail.
  • the spring tongues are oriented on a housing section of the fuel injector which is delimited in the axial direction by a radial flange surface. This housing section for orienting the spring tongues is adjacent to the section of the fuel injector on the inlet side.
  • the injector bracket is secured to the fuel rail by the form spring.
  • the housing section is provided with two flat surfaces lying opposite one another. The fact that the spring tongues lie close to these flat surfaces prevents the fuel injector from twisting.
  • the drawing shows a perspective view of a section of a fuel injection device with a fuel rail and a single fuel injector coupled to the fuel rail. Additional fuel injectors are connected to the fuel rail in the same way as shown.
  • the fuel injection device 1 generally designates a fuel injection device for the direct injection of fuel into a combustion chamber of an Otto engine.
  • the fuel injection device 1 comprises a fuel distributor 2, which is designed as a distributor pipe and to which the fuel is fed from the fuel reservoir via a fuel pump under a certain pressure.
  • the fuel rail 2 is formed with a plurality of laterally radially projecting connecting pieces 3 for connecting fuel injectors 4.
  • the number of connection pieces 3 depends on the number of cylinders of the internal combustion engine.
  • each connecting piece 3 is formed at its free end with a flange 5, by means of which the fuel distributor 2 is fastened to a component 6 of an Otto engine, not shown, for example by screws.
  • Component 6 can be the cylinder head cover, the cylinder head housing or, for example, the intake act air duct.
  • the connecting piece 3 has a receiving bore 7, into which the fuel injector 4 with an injector section 8 on the inlet side is inserted.
  • the inlet-side injector section 8 is provided with grooves for receiving sealing and support rings 9, via which a liquid-tight connection between the fuel distributor 2 and the fuel injector 4 is achieved.
  • the fuel injector 4 is inserted axially displaceably within the receiving bore 7, the connection of the fuel injector 4 to the fuel distributor 2 being ensured as a type of captive device by means of a shaped spring 10.
  • the shaped spring 10 consists of a fastening part 11, from which two spring tongues 12 and 13 lead away from one another.
  • the fastening part 11 is fastened to the flange 5 by screws or clamps.
  • Both spring tongues 12 and 13 are bulged in a direction facing away from the fuel distributor 2 and encompass an upper housing part 14 which adjoins the injector section 8 and is delimited in the axial direction by a contact collar 15 and 16, respectively.
  • Both system collars 15 and 16, together with the spring tongues 12 and 13, secure the fuel injector 4 against sliding out of the receiving bore 7.
  • the upper housing part 14 is provided with two flat surfaces 17 (key surfaces) lying opposite one another, by means of which the fuel injector 4 is rotated relative to the fuel distributor 2 is prevented by the spring tongues 12, 13.
  • the fuel fed from the power distributor is injected directly into the combustion chamber of the internal combustion engine via the fuel injector 4.
  • the fuel injector 4 with its injection nozzle 18 is in contact with the combustion chamber (not shown in more detail) of the Otto engine.
  • the fuel injector 4 is pressed by the form spring 10 against a wall part delimiting the combustion chamber, for example the cylinder base 19, and sealed within the opening of the cylinder head base by a Teflon ring.
  • the shaped spring 10 is designed such that the pretensioning force generated by the spring tongues 12, 13 and acting on the fuel injector 4 is always greater than the gas force from the combustion chamber acting in the opposite direction on the injection nozzle 18.
  • the fuel distributor 2 Since the fuel distributor 2 is attached to the cylinder head cover or another component, manufacturing-related tolerances can occur between the cylinder head base as a contact surface 19 for the fuel injector 4 on the one hand and the attachment location of the fuel distributor 2. At the same time, the different thermal expansions between the steel fuel injector 4 and the cylinder head with the cylinder head cover made of an aluminum alloy are compensated. Because the fuel injector 4 is displaceably arranged within the receiving bore 7, these tolerances can be compensated for. At the same time, this ensures that the biasing force exerted by the form spring 10 as a hold-down device on the fuel injector 4 is essentially the same for all fuel injectors.

Landscapes

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

Abstract

La présente invention concerne un dispositif d'injection de carburant (1) pour un moteur à combustion interne, notamment un moteur à combustion interne à allumage par étincelle à injection directe du carburant dans la chambre de combustion. Ce dispositif d'injection de carburant (1) comprend un distributeur de carburant (2) présentant des raccords (3) qui font saillie latéralement et dans lesquels sont insérés les injecteurs de carburant (4) de manière à pouvoir se déplacer. L'injecteur de carburant (4) est précontraint contre la partie inférieure de la culasse, au moyen d'un ressort profilé fixé au distributeur de carburant (2), afin d'obtenir une installation étanche aux gaz de l'injecteur de carburant (4) sur la culasse. Le ressort profilé (10) sert de système de retenue. Cette invention permet d'atteindre un équilibre des tolérances de fabrication entre le distributeur de carburant et la culasse et d'obtenir des forces de précontrainte identiques sur tous les injecteurs de carburant.
PCT/EP2003/008869 2002-08-27 2003-08-09 Dispositif d'injection de carburant pour moteur a combustion interne WO2004025113A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10239142.4 2002-08-27
DE10239142A DE10239142A1 (de) 2002-08-27 2002-08-27 Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2004025113A1 true WO2004025113A1 (fr) 2004-03-25

Family

ID=31983877

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/008869 WO2004025113A1 (fr) 2002-08-27 2003-08-09 Dispositif d'injection de carburant pour moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE10239142A1 (fr)
WO (1) WO2004025113A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007009839A1 (fr) * 2005-07-15 2007-01-25 Robert Bosch Gmbh Dispositif de retenue
EP2860389A1 (fr) * 2013-10-14 2015-04-15 Continental Automotive GmbH Ensemble d'injecteur de carburant

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5501195A (en) * 1994-09-16 1996-03-26 Siemens Automotive Corporation Retainer arrangement for a bottom feed fuel injector
US5970953A (en) * 1999-01-12 1999-10-26 Siemens Automotive Corporation High pressure injector clip
EP0969203A1 (fr) * 1998-07-01 2000-01-05 MAGNETI MARELLI S.p.A. Système de couplage entre une culasse d'un moteur, un injecteur et une rampe de carburant
US6276339B1 (en) * 2000-05-02 2001-08-21 Delphi Technologies, Inc. Fuel injector spring clip assembly
US6338333B1 (en) * 1999-06-10 2002-01-15 Delphi Technologies, Inc. Integrated fuel delivery module for direct injection
DE10108203A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Montagebügel und Verfahren zur Montage eines Brennstoffeinspritzventils
DE10152421A1 (de) * 2001-10-24 2003-06-18 Bosch Gmbh Robert Befestigungsvorrichtung
DE10163030A1 (de) * 2001-12-20 2003-07-03 Bosch Gmbh Robert Befestigungsvorrichtung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5501195A (en) * 1994-09-16 1996-03-26 Siemens Automotive Corporation Retainer arrangement for a bottom feed fuel injector
EP0969203A1 (fr) * 1998-07-01 2000-01-05 MAGNETI MARELLI S.p.A. Système de couplage entre une culasse d'un moteur, un injecteur et une rampe de carburant
US5970953A (en) * 1999-01-12 1999-10-26 Siemens Automotive Corporation High pressure injector clip
US6338333B1 (en) * 1999-06-10 2002-01-15 Delphi Technologies, Inc. Integrated fuel delivery module for direct injection
US6276339B1 (en) * 2000-05-02 2001-08-21 Delphi Technologies, Inc. Fuel injector spring clip assembly
DE10108203A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Montagebügel und Verfahren zur Montage eines Brennstoffeinspritzventils
DE10152421A1 (de) * 2001-10-24 2003-06-18 Bosch Gmbh Robert Befestigungsvorrichtung
DE10163030A1 (de) * 2001-12-20 2003-07-03 Bosch Gmbh Robert Befestigungsvorrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007009839A1 (fr) * 2005-07-15 2007-01-25 Robert Bosch Gmbh Dispositif de retenue
EP2860389A1 (fr) * 2013-10-14 2015-04-15 Continental Automotive GmbH Ensemble d'injecteur de carburant
KR20150043212A (ko) * 2013-10-14 2015-04-22 콘티넨탈 오토모티브 게엠베하 연료 분사기 조립체
US9803605B2 (en) 2013-10-14 2017-10-31 Continental Automotive Gmbh Fluid injection assembly
KR102220594B1 (ko) 2013-10-14 2021-02-26 콘티넨탈 오토모티브 게엠베하 연료 분사기 조립체

Also Published As

Publication number Publication date
DE10239142A1 (de) 2004-04-29

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