EP1570174A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1570174A1
EP1570174A1 EP03812119A EP03812119A EP1570174A1 EP 1570174 A1 EP1570174 A1 EP 1570174A1 EP 03812119 A EP03812119 A EP 03812119A EP 03812119 A EP03812119 A EP 03812119A EP 1570174 A1 EP1570174 A1 EP 1570174A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel
fuel injection
closing body
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.)
Withdrawn
Application number
EP03812119A
Other languages
German (de)
English (en)
Inventor
Guenter Dantes
Detlef Nowak
Joerg Heyse
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 EP1570174A1 publication Critical patent/EP1570174A1/fr
Withdrawn legal-status Critical Current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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • a fuel injection system for a mixture-compressing, spark-ignited internal combustion engine which comprises a fuel injection valve, which injects fuel into a combustion chamber formed by a piston / cylinder construction, and is provided with a spark plug projecting into the combustion chamber.
  • the fuel injector is provided with at least one row of injection holes distributed over the circumference of the fuel injector. Through a targeted injection of fuel through the injection holes, a jet-guided combustion process is implemented by forming a mixture cloud with at least one jet.
  • a disadvantage of the fuel injector known from the abovementioned publication is, in particular, the coking of the spray orifices, which thereby block and inadmissibly reduce the flow through the fuel injector. This leads to malfunctions of the internal combustion engine.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that a conically tapering in the outflow direction of the fuel guide area in the valve seat body when the fuel injector is closed enables hydraulic self-centering of the valve closing body on the sealing seat, thereby avoiding splashes and thus deposits in the area of the spray openings and an impermissible flow reduction can be prevented.
  • spherical valve closing bodies can be used, which are simple and inexpensive to manufacture and assemble.
  • valve closing body and the valve seat body in the open and closed state of the fuel injector are of different sizes, which forms a slight back pressure which leads to self-centering of the valve closing body.
  • sealing seat and the guide area are drilled and ground in one operation with the same axis of symmetry in a common setting.
  • Fig. 1 shows a schematic section through an embodiment of a fuel injector designed according to the invention
  • FIG. 2 shows a schematic section through the exemplary embodiment of the fuel injection valve according to the invention in area II in FIG. 1.
  • FIG. 1 of a fuel injector 1 is in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • the fuel injection valve 1 is an inward opening one Fuel fine injection valve 1, which has at least one, in the exemplary embodiment two spray orifices 7.
  • the valve closing body 4 is cardanically guided in the valve seat body 5. According to the invention, a guide region 37 of the valve seat body 5 is conically tapered in the spray direction. Grindings 38 on the valve closing body 4 ensure the supply of the fuel flowing through the fuel injection valve 1 to the sealing seat and to the spray openings 7. A detailed description of the measures according to the invention can be found in FIG. 2 and in the description.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a solenoid 10.
  • Solenoid 10 is present.
  • the inner pole 13 and the outer pole 9 are separated from one another by a constriction 26 and from one another by a non-ferromagnetic one
  • the solenoid 10 is connected via a line 19 from an electrical
  • Plug contact 17 energized electrical current.
  • Plug contact 17 is surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting disk 15 is used for stroke adjustment.
  • the armature 20 is located on the other side of the adjusting disk 15. This armature is non-positively connected via a first flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22.
  • a restoring spring 23 is supported on the first flange 21 and, in the present design of the fuel injector 1, is preloaded by a sleeve 24.
  • fuel channels 30, 31 and 32 run.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injector 1 is sealed by a seal 28 against a fuel rail, not shown, and by a further seal 37, against a cylinder head, not shown.
  • An annular damping element 33 which consists of an elastomer material, is arranged on the spray-side side of the armature 20. It rests on a second flange 34, which is non-positively connected to the valve needle 3 via a weld seam 35.
  • the armature 20 In the idle state of the fuel injector 1, the armature 20 is acted upon by the return spring 23 against its stroke direction so that the valve closing body 4 is held on the valve seat surface 6 in sealing contact.
  • the magnetic coil 10 When the magnetic coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, the stroke being predetermined by a working gap 27 which is in the rest position between the inner pole 12 and the armature 20.
  • the armature 20 also takes the first flange 21, which is welded to the valve needle 3, in the lifting direction.
  • the valve closing body 4 in connection with the valve needle 3 lifts off from the valve seat surface 6, and the fuel passed through the fuel channels 30 to 32 is sprayed through the spray opening 7.
  • FIG. 2 shows a section of the section of the fuel injector 1 designed according to the invention, designated II in FIG. 1.
  • valve closing body 4 is cardanically guided in the valve seat body 5.
  • the valve needle 3 does not immediately completely close the fuel injector 1 after its impact in the sealing seat.
  • a certain amount of fuel is undesirably injected. Since this happens during the combustion phase of the fuel-air mixture in the combustion chamber, the flame front strikes up to the spray openings 7.
  • deposits of combustion products increasingly arise in the area of the spray openings 7, which lead to the spray openings 7 being added and thus the flow rate through the fuel injector 1 being reduced to an unacceptably high level.
  • the guide play between the valve closing body 4 and the valve seat body 5 is different in size depending on the stroke of the valve needle 3.
  • the guide play is the smallest and is in the order of magnitude of approximately 4 ⁇ m.
  • the guide play is significantly larger and is, for example, 8 ⁇ m.
  • the opening angle of the conical guide region 37 is preferably between 4 ° and 15 °.
  • valve closing body 4 displaces fuel which is present in the guide region 37 during its axial movement in the flow direction.
  • the fuel builds up because the guide region 37 narrows in the direction of flow.
  • a pressure cushion is accordingly built up in the guide area 37, which hydraulically centers the valve closing body 4 within the guide area 37.
  • the valve closing body 4 thus seals immediately after the closing process over its entire sealing circumference on the valve seat surface 6 against the sealing seat. Without this measure, the valve closing body 4 would impact eccentrically on the valve seat surface 6 and only be centered after a certain time by the closing force acting on it, which is exerted by the return spring 23 via the valve needle 3.
  • valve seat surface 6 and the guide area 37 must preferably be drilled and ground together in one setting on a machine tool with a common axis of symmetry.
  • the invention is not restricted to the exemplary embodiments shown and can be used for any other construction of fuel injection valves 1.

Landscapes

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

Abstract

L'invention concerne une soupape d'injection de carburant (1) pour des systèmes d'injection de carburant de moteurs à combustion interne. Cette soupape d'injection de carburant comprend un actionneur excitable (10), un pointeau de soupape (3) en liaison active avec l'actionneur (10) et soumis à l'action d'un ressort de rappel (23) dans un sens de fermeture, lequel pointeau de soupape est destiné à actionner un corps de fermeture de soupape (4) formant un siège d'étanchéité avec une surface de siège de soupape (6) formée sur un corps de siège de soupape (5), ainsi qu'au moins un trou d'injection (7) formé dans le corps de siège de soupape (5). Ladite soupape d'injection de carburant est caractérisée en ce qu'une zone de guidage (37), formée dans le corps de siège de soupape (5) et dans laquelle le corps de fermeture de soupape (4) est guidé, présente une forme conique s'amincissant dans un sens d'écoulement du carburant.
EP03812119A 2002-12-04 2003-07-02 Soupape d'injection de carburant Withdrawn EP1570174A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10256667A DE10256667A1 (de) 2002-12-04 2002-12-04 Brennstoffeinspritzventil
DE10256667 2002-12-04
PCT/DE2003/002210 WO2004051076A1 (fr) 2002-12-04 2003-07-02 Soupape d'injection de carburant

Publications (1)

Publication Number Publication Date
EP1570174A1 true EP1570174A1 (fr) 2005-09-07

Family

ID=32403702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03812119A Withdrawn EP1570174A1 (fr) 2002-12-04 2003-07-02 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US20060124774A1 (fr)
EP (1) EP1570174A1 (fr)
JP (1) JP2006509139A (fr)
DE (1) DE10256667A1 (fr)
WO (1) WO2004051076A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070131803A1 (en) * 2005-12-13 2007-06-14 Phadke Milind V Fuel injector having integrated valve seat guide
DE102005061424A1 (de) * 2005-12-22 2007-07-05 Robert Bosch Gmbh Brennstoffeinspritzventil
US20090057446A1 (en) * 2007-08-29 2009-03-05 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US7669789B2 (en) 2007-08-29 2010-03-02 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
WO2009137825A1 (fr) * 2008-05-09 2009-11-12 United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Capteur chimique sans fil et procédé de détection à utiliser avec celui-ci
EP2924148A1 (fr) * 2009-08-27 2015-09-30 McAlister Technologies, LLC Injecteur de carburant
JP6311472B2 (ja) * 2014-06-16 2018-04-18 株式会社デンソー 燃料噴射弁
DE102015215533A1 (de) * 2015-08-14 2017-02-16 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
EP3783220A1 (fr) * 2019-08-22 2021-02-24 Vitesco Technologies GmbH Corps de siège de soupape pour un injecteur de fluide d'un moteur à combustion interne
EP3997327A1 (fr) * 2019-07-10 2022-05-18 Vitesco Technologies GmbH Injecteur de fluide d'un moteur à combustion interne comprenant un corps de siège de soupape

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002317735A (ja) * 2001-04-23 2002-10-31 Denso Corp 燃料噴射ノズル

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980237A (en) * 1975-11-17 1976-09-14 Allis-Chalmers Corporation Differential valve in fuel injection nozzle
DE2920100A1 (de) * 1979-05-18 1980-11-27 Bosch Gmbh Robert Kraftstoffeinspritzduese mit gesteuertem einspritzquerschnitt fuer brennkraftmaschinen
SU1557348A1 (ru) * 1988-01-15 1990-04-15 Саратовский Институт Механизации Сельского Хозяйства Им.М.И.Калинина Распылитель форсунки
DE3825134A1 (de) * 1988-07-23 1990-01-25 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil und verfahren zur herstellung
DE3841142C2 (de) * 1988-12-07 1994-09-29 Bosch Gmbh Robert Einspritzventil
US5285969A (en) * 1989-11-25 1994-02-15 Robert Bosch Gmbh Electromagnetically operated fuel injection valve
DE4137994C2 (de) * 1991-11-19 1999-06-02 Bosch Gmbh Robert Elektromagnetisch betätigbares Einspritzventil mit einem Düsenträger und Verfahren zur Herstellung eines Düsenträgers eines Einspritzventils
DE19623713B4 (de) * 1996-06-14 2008-06-19 Robert Bosch Gmbh Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors
DE19633260A1 (de) * 1996-08-17 1998-02-19 Bosch Gmbh Robert Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors
DE19835693A1 (de) * 1998-08-07 2000-02-10 Bosch Gmbh Robert Brennstoffeinspritzventil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002317735A (ja) * 2001-04-23 2002-10-31 Denso Corp 燃料噴射ノズル

Also Published As

Publication number Publication date
JP2006509139A (ja) 2006-03-16
US20060124774A1 (en) 2006-06-15
WO2004051076A1 (fr) 2004-06-17
DE10256667A1 (de) 2004-07-29

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