EP1463886B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP1463886B1
EP1463886B1 EP02792620A EP02792620A EP1463886B1 EP 1463886 B1 EP1463886 B1 EP 1463886B1 EP 02792620 A EP02792620 A EP 02792620A EP 02792620 A EP02792620 A EP 02792620A EP 1463886 B1 EP1463886 B1 EP 1463886B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
coating
injection valve
sealing ring
injection system
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
EP02792620A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1463886A1 (de
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/de
Application granted granted Critical
Publication of EP1463886B1 publication Critical patent/EP1463886B1/de
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
    • 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 injection valve according to the preamble of claim 1.
  • an electromagnetic fuel injection valve and a fastening structure suitable therefor are known with which the requirements for the sealing effect, the thermal resistance and the pressure resistance are fulfilled for an internal combustion engine having a cylinder injection system. Particular care is taken in the sealing of the area in the immediate vicinity of the cylinder, in which the electromagnetic fuel injection valve is mounted, as well as on an area further away.
  • a first sealing portion with a first sealing ring which is designed as a corrugated washer, is located at a location close to the cylinder and between the fuel injection valve and the cylinder head.
  • a second sealing portion with a second sealing ring which is also designed as a corrugated washer, positioned at a location which is farther from the cylinder than the first sealing portion.
  • a disadvantage of the from the DE 196 00 403 A1 known fuel injection valve is in particular the high coking tendency of the formed between the fuel injection valve and the wall of the cylinder head gap downstream of the sealing ring, resulting in a considerable force and possible damage during disassembly of the fuel injection valve from the cylinder head.
  • nozzle body having a surface which faces the combustion chamber and is provided with an adhesion-reducing coating to prevent fuel deposits known.
  • the coating is applied only on the tip of the nozzle body.
  • the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage that a patch on the tip of the fuel injection valve and the annular gap between the fuel injection valve and the cylinder wall filling coating prevents the penetration and subsequent burning of fuel in the annular gap. As a result, on the one hand, the deposition of coking residues in the annular gap can be avoided and, on the other hand, the thermal load of the sealing ring can be reduced.
  • the coating can be solid or pasty or liquid, depending on the requirements placed on it.
  • the coating fills the entire downstream part of the annular gap, so that any penetration of mixture is prevented.
  • Teflon ® layer may be carried out, which may be integrally formed with the also made of Teflon ® seal.
  • a fuel injection valve 1 is in the form of a fuel injection valve for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable for the direct injection of fuel into a combustion chamber 18 of an internal combustion engine.
  • the fuel injection valve 1 comprises a nozzle body 2 and a valve housing 3. On the inflow side, an inlet nozzle 4 is formed, in which an intermediate sleeve 5 is arranged for connection of the fuel injection valve 1 with a fuel distributor line 6.
  • Support members 9 and 10 ensure a correct mounting position of the above components to each other.
  • the fuel injection valve 1 is inserted into a cylinder head 11 of the internal combustion engine and is fixed there by means of a hold-down only 12, which may be formed, for example, as a clamping claw or spring sleeve, fixed and secured against rotation.
  • annular gap 14 is formed, which must have a certain width, so on the one hand, the fuel injector 1 without too much effort, which u. U. could lead to damage to the fuel injection valve 1, is mountable, and on the other hand, a thermal expansion of the components in the heating by the operation of the internal combustion engine allowed.
  • 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 is preferably made of Teflon® in order to achieve a reliable sealing effect with high stability.
  • Outflow side of the sealing ring 15 of the annular gap 14 is inventively filled by a coating 17, which prevents the fuel-air mixture penetrates into the annular gap 14 and burns after ignition of the mixture in the combustion chamber 18 mixture cloud under deposition of coking residues.
  • a coating 17 which prevents the fuel-air mixture penetrates into the annular gap 14 and burns after ignition of the mixture in the combustion chamber 18 mixture cloud under deposition of coking residues.
  • the entire room must not be filled, as otherwise installation tolerances can not be compensated (eg tilting of the injection valve).
  • the coating 17 reduces too high a thermal load on the sealing ring 15, which occurs when the internal combustion engine is put into operation.
  • the coating 17 must therefore preferably be temperature-resistant up to 200 ° C. and be resistant to the combustion chamber atmosphere, so that a 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 injection valve 1 before assembly, or else it is introduced into the annular gap 14 after installation of the fuel injection valve 1.
  • the coating 17 may thus be either solid or pasty and brushable or liquid. It can for example be injected from a tube or a similar device in the annular gap 14.
  • the coating may consist of a thin Teflon® layer.
  • Teflon® layer may consist of Teflon® layer.
  • Teflon ® sealing ring 15 it is also conceivable to form these integrally with the likewise made of Teflon ® sealing ring 15.
  • the coating 17 is attached to the downstream end of the nozzle body 2 of the fuel injection valve 1 so that it occupies the outflow side of the sealing ring 15 extending part of the annular gap 14 completely on the entire axial length between the sealing ring 15 and the combustion chamber 18. As a result, any penetration of mixture into the annular gap 14 is prevented.
  • the invention is not limited to the illustrated embodiment and for any construction of fuel injectors 1, for example, for fuel injectors 1 with connection to a common rail system, applicable.

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)
EP02792620A 2002-01-03 2002-11-29 Brennstoffeinspritzventil Expired - Lifetime EP1463886B1 (de)

Applications Claiming Priority (3)

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

Publications (2)

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

Family

ID=7711449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02792620A Expired - Lifetime EP1463886B1 (de) 2002-01-03 2002-11-29 Brennstoffeinspritzventil

Country Status (6)

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

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 (en) * 2006-02-08 2008-09-17 Siemens Aktiengesellschaft Coupling device for connecting an injector to a fluid supply
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
DE60020463T2 (de) * 1999-09-03 2006-04-27 Delphi Technologies, Inc., Troy Einspritzdüse
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

Also Published As

Publication number Publication date
DE50211577D1 (de) 2008-03-06
US20040124276A1 (en) 2004-07-01
JP2005515348A (ja) 2005-05-26
KR20040068608A (ko) 2004-07-31
WO2003060316A1 (de) 2003-07-24
EP1463886A1 (de) 2004-10-06
DE10200044A1 (de) 2003-07-24

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