EP1463886A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1463886A1
EP1463886A1 EP02792620A EP02792620A EP1463886A1 EP 1463886 A1 EP1463886 A1 EP 1463886A1 EP 02792620 A EP02792620 A EP 02792620A EP 02792620 A EP02792620 A EP 02792620A EP 1463886 A1 EP1463886 A1 EP 1463886A1
Authority
EP
European Patent Office
Prior art keywords
injection valve
fuel injection
coating
sealing ring
fuel
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
EP02792620A
Other languages
German (de)
English (en)
Other versions
EP1463886B1 (fr
Inventor
Werner Berger
Martin Buehner
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 EP1463886A1 publication Critical patent/EP1463886A1/fr
Application granted granted Critical
Publication of EP1463886B1 publication Critical patent/EP1463886B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • 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
    • 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
    • F02M61/166—Selection of particular materials
    • 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 fuel injector according to the preamble of the main claim.
  • an electromagnetic fuel injection valve and a suitable fastening structure are known with which the requirements for the sealing effect, the thermal resistance and the pressure resistance are met for an internal combustion engine with a cylinder injection system. Particular care is taken to seal the area in the immediate vicinity of the cylinder in which the electromagnetic fuel injector is attached, as well as to an area further away.
  • a first sealing section with a first sealing ring which is designed as a corrugated washer, lies at a point close to the cylinder and between the fuel injection valve and the cylinder head.
  • a second sealing section with a second sealing ring which is also designed as a corrugated washer, is positioned at a location which is further away from the cylinder than the first sealing section.
  • Fuel injector is particularly high
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that a coating placed on the tip of the fuel injector and filling the annular gap between the fuel injector and the cylinder wall prevents the penetration and subsequent burning of fuel in the annular gap. As a result, deposits of coking residues in the annular gap can be avoided on the one hand, and the thermal load on the sealing ring can be reduced on the other.
  • the coating can be solid or pasty or liquid, depending on the requirements placed on it.
  • the entire space must not be filled, as otherwise installation tolerances cannot be compensated for (e.g. tilting of the injection valve).
  • the coating fills the entire downstream part of the annular gap, so that any penetration of the mixture is prevented.
  • the coating can be in the form of a thin Teflon layer, which can be formed in one piece with the sealing ring, which is also made of Teflon.
  • Fig. 1 shows a schematic section through an embodiment of a fuel injector according to the invention.
  • a fuel injection valve 1 is in the form of a fuel injection valve for fuel injection systems ⁇ n mixture-compressing, spark-ignited
  • Fuel injection valve 1 is suitable for injecting fuel directly into a combustion chamber 18 of an internal combustion engine.
  • the fuel injector 1 comprises a nozzle body 2 and a valve housing 3. On the inflow side, an inlet connection 4 is formed, in which an intermediate sleeve 5 for connecting the fuel injector 1 to a fuel distributor line 6 is arranged.
  • the seal between the fuel injection valve 1 and the intermediate sleeve 5 and between the intermediate sleeve 5 and the fuel distributor line 6 is carried out by means of sealing rings 7 and 8.
  • Support components 9 and 10 ensure a correct mounting position of the above-mentioned components with respect to one another.
  • the fuel injector 1 is inserted into a cylinder head 11 of the internal combustion engine and is fixed there in a stationary and non-rotatable manner by means of a hold-down device 12, which is only indicated by 1 , which can be designed, for example, as a clamping claw or spring sleeve.
  • annular gap 14 is formed, which must have a certain width, so that on the one hand the fuel injector 1 without too much effort, which u. U.. could lead to damage to the fuel injector 1, is mountable, and which, on the other hand, allows thermal expansion of the components when heated by the operation of the internal combustion engine.
  • a sealing ring 15 is provided, which is arranged in a recess 16 of the nozzle body 2 of the fuel injection valve 1.
  • the sealing ring 15 preferably consists of
  • the annular gap 14 is filled according to the invention by a coating 17 which prevents the fuel-air mixture from penetrating into the annular gap 14 and burning off after the ignition of the mixture cloud in the combustion chamber 18 with deposits of coking residues.
  • a coating 17 which prevents the fuel-air mixture from penetrating into the annular gap 14 and burning off after the ignition of the mixture cloud in the combustion chamber 18 with deposits of coking residues.
  • the entire space must not be filled, as otherwise installation tolerances cannot be compensated for (e.g. tilting of the injection valve).
  • the inventive coating 17 made considerably more difficult by the caked carbon residues, making it the Zylinderkop cause damage to the fuel injector 1 'to the point of complete destruction and damage to the wall 13 it 11 can.
  • the coating 17 reduces an excessive thermal load on the sealing ring 15, which occurs when the internal combustion engine is started up.
  • the coating 17 must therefore preferably be temperature-resistant up to 200 ° C. and be resistant to the combustion chamber atmosphere, so that possible contact between the mixtures present in the combustion chamber 18 and the material of the coating 17 does not have a destructive effect.
  • the coating 17 can either be applied to the nozzle body 2 of the fuel injector 1 or to the wall 13 of the cylinder head 11 before assembly, or it is introduced into the annular gap 14 after the assembly of the fuel injector 1.
  • the coating 17 can thus be either solid or pasty and spreadable or liquid. For example, it can be injected into the annular gap 14 from a tube or a similar device.
  • the coating can consist of a thin Teflon layer.
  • Teflon layer a thin Teflon layer.
  • the coating 17 is attached to the downstream end of the nozzle body 2 of the fuel injector 1 so that it completely occupies the part of the annular gap 14 extending downstream of the sealing ring 15 over the entire axial length between the sealing ring 15 and the combustion chamber 18. This prevents any penetration of mixture into the annular gap 14.
  • the invention is not limited to the exemplary embodiment shown and can be used for any construction of fuel injection valves 1, for example for fuel injection valves 1 with a connection to a Coramon rail system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne une soupape d'injection de carburant (1) servant à l'injection directe de carburant dans la chambre de combustion (18) d'un moteur à combustion interne à allumage commandé et compression de mélange. Cette soupape d'injection comprend un corps d'injecteur (2) et une bague d'étanchéité (15), qui assure l'étanchéité entre la soupape d'injection de carburant (1) et la tête de cylindre (11) du moteur. L'invention est caractérisée en ce qu'un interstice annulaire (14), formé entre une paroi (13) de la tête de cylindre (11) et le corps d'injecteur (2) de ladite soupape (1), est pourvu d'un revêtement (17) qui réduit l'adhésion.
EP02792620A 2002-01-03 2002-11-29 Soupape d'injection de carburant Expired - Lifetime EP1463886B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10200044 2002-01-03
DE10200044A DE10200044A1 (de) 2002-01-03 2002-01-03 Brennstoffeinspritzventil
PCT/DE2002/004385 WO2003060316A1 (fr) 2002-01-03 2002-11-29 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1463886A1 true EP1463886A1 (fr) 2004-10-06
EP1463886B1 EP1463886B1 (fr) 2008-01-16

Family

ID=7711449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02792620A Expired - Lifetime EP1463886B1 (fr) 2002-01-03 2002-11-29 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US20040124276A1 (fr)
EP (1) EP1463886B1 (fr)
JP (1) JP2005515348A (fr)
KR (1) KR20040068608A (fr)
DE (2) DE10200044A1 (fr)
WO (1) WO2003060316A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004060983B4 (de) * 2004-12-17 2017-02-02 Robert Bosch Gmbh Brennstoffeinspritzventil
EP1818535B1 (fr) * 2006-02-08 2008-09-17 Siemens Aktiengesellschaft Dispositif de raccordement pour raccorder un injecteur à un alimentation de fluide
DE102009045692A1 (de) 2009-10-14 2011-04-21 Robert Bosch Gmbh Verfahren zur Montage eines Dichtungsrings
DE102018106822A1 (de) * 2018-03-22 2019-09-26 Volkswagen Ag Regenerationsverfahren zur Reduzierung des Verkokungsgrades eines einen Injektor umgebenden Ringspaltes

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777431A (en) * 1953-08-28 1957-01-15 Maschf Augsburg Nuernberg Ag Injection nozzle arrangement
DE1526709A1 (de) * 1966-01-19 1970-03-05 Maschf Augsburg Nuernberg Ag Fluessigkeitsgekuehlte Einspritzduese fuer Brennkraftmaschinen
US3695235A (en) * 1970-08-26 1972-10-03 Mcculloch Corp Heat seal for fuel injection nozzles
DE2900176A1 (de) * 1979-01-04 1980-07-24 Bosch Gmbh Robert Einspritzventil fuer kraftstoffeinspritzanlagen
US4506645A (en) * 1983-06-10 1985-03-26 Deere & Company Load carrying assembly for an internal combustion engine
DE3340445A1 (de) * 1983-11-09 1985-05-15 Motoren-Werke Mannheim AG vorm. Benz Abt. stationärer Motorenbau, 6800 Mannheim Zylinderkopf
JPS6220672A (ja) * 1985-07-18 1987-01-29 Hitachi Zosen Corp 内燃機関の燃料弁アトマイザ
JPS62298658A (ja) * 1986-06-19 1987-12-25 Diesel Kiki Co Ltd 燃料噴射ノズル
JPH08200182A (ja) 1995-01-25 1996-08-06 Zexel Corp 電磁式燃料噴射弁およびその取付け構造
JPH09112392A (ja) * 1995-10-13 1997-04-28 Denso Corp 内燃機関用燃料噴射ノズル及びその製造方法
DE19743103A1 (de) * 1997-09-30 1999-04-01 Bosch Gmbh Robert Wärmeschutzhülse
DE59907093D1 (de) * 1998-08-27 2003-10-30 Waertsilae Nsd Schweiz Ag Verfahren zum Herstellen einer Brennstoffeinspritzdüse und Brennstoffeinspritzdüse
DE19932763A1 (de) * 1999-07-14 2001-01-18 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1081374B1 (fr) * 1999-09-03 2005-06-01 Delphi Technologies, Inc. Buse d'injection
DE10027662A1 (de) * 2000-06-03 2001-12-06 Bosch Gmbh Robert Dichtmittel und Niederhalter für ein Brennstoffeinspritzventil
DE10159909A1 (de) * 2001-12-06 2003-06-18 Bosch Gmbh Robert Brennstoffeinspritzventil-Zündkerze-Kombination
US6640784B1 (en) * 2002-10-09 2003-11-04 Robert Bosch Corporation Spark ignition direct injection system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03060316A1 *

Also Published As

Publication number Publication date
US20040124276A1 (en) 2004-07-01
DE50211577D1 (de) 2008-03-06
WO2003060316A1 (fr) 2003-07-24
KR20040068608A (ko) 2004-07-31
DE10200044A1 (de) 2003-07-24
EP1463886B1 (fr) 2008-01-16
JP2005515348A (ja) 2005-05-26

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