EP1658429A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1658429A1
EP1658429A1 EP04738873A EP04738873A EP1658429A1 EP 1658429 A1 EP1658429 A1 EP 1658429A1 EP 04738873 A EP04738873 A EP 04738873A EP 04738873 A EP04738873 A EP 04738873A EP 1658429 A1 EP1658429 A1 EP 1658429A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
sleeve
seat body
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
EP04738873A
Other languages
German (de)
English (en)
Other versions
EP1658429B1 (fr
Inventor
Thomas Sebastian
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 EP1658429A1 publication Critical patent/EP1658429A1/fr
Application granted granted Critical
Publication of EP1658429B1 publication Critical patent/EP1658429B1/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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1853—Orifice plates

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim, the z. B. is known from DE 195 27 049 AI.
  • the valve seat is manufactured in high quality by grinding and subsequent honing.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the valve seat body is held in the valve sleeve by a clamping sleeve without press fits with the resulting surface deterioration being required. This enables thermal decoupling and, at the same time, simple assembly with reliable tightness.
  • the clamping sleeve ' is advantageously elastic both in the radial and in the axial direction, as a result of which it remains in position itself on the one hand and on the other hand correctly positions the valve seat body and the spray orifice plate.
  • valve seat body is sealed against the valve sleeve in a simple and cost-effective manner by a sealing ring.
  • clamping sleeve can be produced in a simple manner by punching and bending.
  • FIG. 2A shows a schematic, excerpted section through the spray-side end of an exemplary embodiment of a fuel injector designed according to the invention
  • FIG. 2B shows a schematic perspective illustration of the clamping sleeve from the exemplary embodiment of a fuel injector designed according to the invention shown in FIG. 2A.
  • FIG. 1 first shows a longitudinal section through the part of a fuel injector 1 according to the prior art, which is particularly suitable for injecting fuel into an intake manifold (not shown) of an internal combustion engine, in a schematic sectional view.
  • the fuel injection valve 1 comprises an actuator in the exemplary embodiment in the form of a solenoid coil 2, which is wound on a coil carrier 3.
  • the coil carrier 3 is encapsulated in a valve housing 4.
  • the coil carrier 3 is penetrated by a valve sleeve 5, which is tubular and comprises a support tube 6, spread or welded therein, which serves as the inner pole of the magnet coil 2.
  • the valve housing 4 can serve, for example, as the outer pole of the magnetic coil 2.
  • An armature 7 is arranged on the outflow side of the support tube 6 and is integral with a valve needle 8 is trained .
  • through-flow openings 9 are provided which direct the fuel flowing through the fuel injection valve 1 to a sealing seat.
  • An annular filter 10 for filtering the fuel can be arranged in the area of the throughflow openings 9.
  • the valve needle 8 is preferably operatively connected by welding to a spherical valve closing body 11, which forms a sealing seat z with a valve seat body 12. Downstream of the sealing seat at least one Absprit zöf opening 14 is formed in a spray orifice plate 13, from which fuel is injected into the intake manifold not shown.
  • the armature 7 is acted upon by a return spring 15 in the idle state of the fuel injector 1 so that the fuel injector 1 is kept closed by the pressure of the valve closing body 11 on the valve seat body 12.
  • the return spring 15 is arranged in a recess 16 of the armature 7 or the support tube 6 and is preloaded by an adjusting sleeve (not shown).
  • the fuel injector 1 is closed as soon as the current exciting the magnet coil 2 is switched off and that Magnetic field has been reduced so far that the return spring 15 presses the armature 7 off the support tube 6, as a result of which the valve needle 8 moves in the outflow direction and the valve closing body 11 touches the valve seat body 12.
  • the fuel injection valve 1 shown in FIG. 1 is sealed off from the intake manifold of the internal combustion engine (not shown in more detail) by means of a preferably annular seal 18 which is pushed over a projecting edge 19 of the valve housing 4 and is secured against slipping off by means of a plastic extrusion coating 20.
  • Fuel injector 1 may be poor.
  • valve closing body 12 with the sealing seat formed thereon by grinding and honing achieves a high surface quality with a good seal associated therewith, this is achieved by the subsequent machining processes such as this
  • FIG. 1 An exemplary embodiment of a fuel injection valve 1 designed according to the invention shown in FIG. 1
  • the individual components are assembled in a simple manner.
  • the spray hole disk 13 is inserted into the valve sleeve 5 with a clearance fit.
  • the Valve seat body 12 mounted, which is sealed against the valve sleeve 5 via a sealing ring 24.
  • the valve seat body 12 also has a clearance fit with the valve sleeve 5.
  • the spray hole plate 13 is centered by a chamfer 25 on the side of the valve seat body 12 facing the spray hole plate 13.
  • the valve seat body 12 is fixed and, as a result, the fuel injector 1 is sealed by pressing the clamping sleeve 23 into the valve sleeve 5, which is supported on the valve seat body 12.
  • valve sleeve 5 deterioration in the surface quality of the valve sleeve 5 can be avoided on the one hand and the work steps of welding the valve seat body 12, the spray disk 13 and the valve sleeve 5 can also be saved. None of the components have to be manufactured with high precision, since only a clearance fit and no press fit is required.
  • valve seat body 12 This also achieves thermal decoupling of the valve seat body 12 from the valve sleeve 5, which enables improved hot behavior with respect to the fuel.
  • the clamping sleeve 23 is both radially and axially elastic and thus ensures its own correct position in the valve sleeve 5 as well as the positioning of the valve seat body 12 in the valve sleeve 5.
  • FIG. 2B The elasticity in two directions can be seen from FIG. 2B, in which the clamping sleeve 23 is shown in a perspective view in the unassembled state.
  • the clamping sleeve 23 has an axial slot 26, which determines the elasticity in the circumferential direction, as well as elastic tongues 27, which are formed on a side of the clamping sleeve 23 facing the valve seat body 12 and enable elastic support of the clamping sleeve 23 on the valve seat body 12.
  • the invention is not limited to the illustrated embodiment and for any construction of fuel fine injection valves 1 suitable, for. B. for fuel injection valves 1 with piezoelectric actuators. In particular, any combination of the individual features is possible.

Landscapes

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

Abstract

La présente invention concerne une soupape d'injection de carburant (1) destinée à des systèmes d'injection de carburant de moteurs à combustion interne, comprenant une bobine magnétique (2) et un induit (7) qui peut être excité par la bobine magnétique (2) et qui est en liaison active avec un corps de fermeture de soupape (11) qui forme un siège étanche avec un corps de siège de soupape (12) disposé dans une douille de soupape (5). Le corps de siège de soupape (12) est fixé dans la douille de soupape (5) au moyen d'une douille de serrage (23).
EP04738873A 2003-08-19 2004-07-07 Soupape d'injection de carburant Expired - Lifetime EP1658429B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10338081A DE10338081A1 (de) 2003-08-19 2003-08-19 Brennstoffeinspritzventil
PCT/DE2004/001451 WO2005019641A1 (fr) 2003-08-19 2004-07-07 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1658429A1 true EP1658429A1 (fr) 2006-05-24
EP1658429B1 EP1658429B1 (fr) 2007-05-23

Family

ID=34177687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04738873A Expired - Lifetime EP1658429B1 (fr) 2003-08-19 2004-07-07 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US8191797B2 (fr)
EP (1) EP1658429B1 (fr)
JP (1) JP2006513364A (fr)
DE (2) DE10338081A1 (fr)
WO (1) WO2005019641A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005040363B4 (de) 2005-08-26 2017-09-14 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006052817A1 (de) * 2006-11-09 2008-05-15 Robert Bosch Gmbh Brennstoffeinspritzventil
EP1975486B1 (fr) * 2007-03-28 2014-12-03 Fillon Technologies (SAS Société par Actions Simplifiée) Valve de dosage
US8006715B2 (en) 2007-09-20 2011-08-30 Caterpillar Inc. Valve with thin-film coating

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245096A (en) * 1962-02-23 1966-04-12 Long Lok Corp Self-locking screw
EP0042799A3 (fr) 1980-06-23 1982-01-13 The Bendix Corporation Injecteur électromagnétique de carburant
US4423843A (en) * 1982-01-28 1984-01-03 General Motors Corporation Electromagnetic fuel injector with armature stop and adjustable armature spring
JPH02503101A (ja) 1986-10-30 1990-09-27 ジーメンス・アクティエンゲゼルシャフト 高圧渦巻き噴射器
JP3546490B2 (ja) 1994-10-03 2004-07-28 株式会社デンソー 電磁式燃料噴射弁
DE19527049A1 (de) * 1995-07-25 1997-01-30 Bosch Gmbh Robert Brennstoffeinspritzventil
GB9615278D0 (en) 1996-07-20 1996-09-04 Philips Electronics Nv Capacitive sensing array device
JPH11132127A (ja) 1996-11-13 1999-05-18 Denso Corp 燃料噴射弁及びその組立方法
DE19907544C2 (de) * 1999-02-22 2002-12-05 Siemens Ag Injektor für eine Einspritzanlage einer Brennkraftmaschine
US6186421B1 (en) * 1999-12-06 2001-02-13 Delphi Technologies, Inc. Fuel Injector
US6390067B1 (en) 2000-08-10 2002-05-21 Delphi Technologies, Inc. Valve seat retainer for a fuel injector
US6550690B2 (en) 2000-12-29 2003-04-22 Siemens Automotive Corporation Modular fuel injector having interchangeable armature assemblies and having an integral filter and dynamic adjustment assembly
DE20110130U1 (de) * 2001-06-19 2002-10-24 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005019641A1 *

Also Published As

Publication number Publication date
EP1658429B1 (fr) 2007-05-23
WO2005019641A1 (fr) 2005-03-03
DE502004003900D1 (de) 2007-07-05
US8191797B2 (en) 2012-06-05
JP2006513364A (ja) 2006-04-20
DE10338081A1 (de) 2005-03-10
US20070057088A1 (en) 2007-03-15

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