EP0538247A1 - Soupape d'injection de carburant. - Google Patents

Soupape d'injection de carburant.

Info

Publication number
EP0538247A1
EP0538247A1 EP90910107A EP90910107A EP0538247A1 EP 0538247 A1 EP0538247 A1 EP 0538247A1 EP 90910107 A EP90910107 A EP 90910107A EP 90910107 A EP90910107 A EP 90910107A EP 0538247 A1 EP0538247 A1 EP 0538247A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
fuel
recess
injection valve
opening
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
EP90910107A
Other languages
German (de)
English (en)
Other versions
EP0538247B1 (fr
Inventor
Christian Preussner
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 EP0538247A1 publication Critical patent/EP0538247A1/fr
Application granted granted Critical
Publication of EP0538247B1 publication Critical patent/EP0538247B1/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
    • 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
    • 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

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a fuel injection valve is already known (DE-OS 3540 660), in which a protective cap is provided which has a through opening in its base downstream of an injection opening.
  • the protective cap is intended to prevent damage in the area of the injection opening or a possibly provided needle pin.
  • the protective cap is intended to prevent particles from the vicinity of the fuel injection valve z - projecting into the intake manifold with its nozzle body.
  • Zi in E? Rei r. deposit the ice injection opening and lead to a narrowing of the injection opening, as a result of which the amount of fuel injected is undesirably reduced and the fuel / air mixture supplied to the internal combustion engine becomes too lean.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the protective cap not only provides protection against accidental contact and deposits from the outside are avoided, but also that fuel deposits due to the successive operating and shutdown phases do not last for a longer period of operation of the internal combustion engine cause the amount of fuel metered by the fuel injector to be undesirably reduced. This ensures proper operation of the internal combustion engine.
  • the design of the protective cap made of plastic is particularly advantageous, which ensures easy manufacture. drawing
  • FIG. 1 shows a first exemplary embodiment of a fuel injector designed according to the invention in partial view
  • FIG. 2 shows a second exemplary embodiment of a fuel injector designed according to the invention in partial view
  • FIG. 3 shows a section along line III-III in FIG. 2.
  • the fuel injection valve shown in partial view in FIG. 1 essentially corresponds to a fuel injection valve for a fuel injection system of a mixture-compressing spark-ignition internal combustion engine described in DE-OS 37 10 467 and is used for fuel injection into the intake pipe of the internal combustion engine.
  • a nozzle body 1 is connected to a valve housing (not shown), in which a valve needle 3 is guided in a guide opening 2.
  • the guide opening 2 ends in the illustrated nozzle body 1 in a backstitch 5, which is followed by a conical valve seat surface 8 in the flow direction of the fuel.
  • a cylindrical transition opening 10 runs between the valve seat surface ⁇ and e_._ ⁇ er nozzles> l : r ⁇ erscirnflache 9.
  • valve needle 3 In the area of the valve seat surface 8 of the nozzle body 1, the valve needle 3 merges into a conical sealing seat 11 which ends in a cylindrical pin 12. In the closed state of the fuel injection valve, the valve needle rests with the sealing seat 11 on the valve seat surface 8, while in the open state of the fuel injection valve the sealing seat 11 is lifted off the valve seat surface 8 and fuel can flow to the transition opening 10.
  • a thin perforated plate 15 is tightly attached to the nozzle body end face 9 by welding in its area covered by the transition opening 10 has at least one injection opening 16 serving for fuel metering, which penetrates the perforated plate and extends inclined with respect to the valve longitudinal axis 17, the inclinations depending on the type of use being able to run such that the individual injection openings 16 escaping fuel jets can either be directed inwards in the direction of the longitudinal axis 17 of the valve or away from the longitudinal axis 17 of the valve.
  • the cross-section of the injection openings 16 determines the amount of fuel injected per unit of time when the fuel injection valve is open.
  • the fuel injection valve is opened electromagnetically in a manner not shown.
  • the injection openings 16 are arranged on the perforated plate 15 such that they start from the annular space formed between the pin 12 of the valve needle 3 and the wall of the transition opening 10, with the cylindrical pin 12 almost up to the perforated plate 15 when the fuel injection valve is closed protrudes.
  • a cup-shaped protective cap 20 is pushed onto the nozzle body end 4, which partially surrounds the nozzle body 1 in the axial direction with a cylinder jacket 21 and with an inwardly directed latching shoulder 22 into an annular groove 23 of the nozzle body 1 to fix the protective cap 20 in position intervenes.
  • a bottom 24 of the guard ap e 2J has a through opening 27, xonzencrisch to the longitudinal axis 17 of the valve and extends in the radial direction over the perforated plate 15, whereby it abuts the perforated plate 15 with a contact section 28.
  • the bottom 24 extends radially inwards to the through opening 27 with an axial distance from the perforated plate 15, so that an annular recess 29 is formed there between the bottom 24 and the perforated plate 15, the internal width of which is compared to the diameter of the through opening 27 is small.
  • the protective cap 20 is preferably made of plastic.
  • the inside width of the recess 29, that is to say the extent in the direction of the valve longitudinal axis 17, is very small, so that the recess 29 has the shape of an annular gap, which exerts such a large capillary action on fuel in all positions of the fuel injection valve that the fuel present in the recess 29 does not flow out of the passage opening 27 due to its weight.
  • the recess 29 can taper or widen starting from the through opening 27 with increasing radial extent in the axial direction. If the internal combustion engine is switched off and thus also the fuel injection system, the fuel injection valve is closed and any fuel present in the recess 29 and the passage opening 27 is partially evaporated due to the greater heating of the internal combustion engine, only the components of the Fuel volatilize, while the components evaporating at higher temperatures are not sufficiently heated and move radially outwards due to the capillary action of the recess 29, where they are deposited on the wall on the contact section 28, so that the through opening 27 and the Perforated plate 15 remain free of fuel deposits in the area of injection openings 16.
  • the protective cap 20 of the exemplary embodiment according to FIG. 2 differs from the protective cap of the exemplary embodiment according to FIG. 1 in that no axial distance is formed between the base 24 and the perforated plate 15, but rather penetrating the base 24 in a radial direction starting from the through opening 27 at least one recess 31 is provided which extends in the shape of a slot in the direction of the cylinder jacket 21.
  • four recesses 31 can be provided which, as shown in FIG.
  • the recesses 31 can widen or taper with increasing radial extension in the circumferential direction.
  • four injection openings 16 are shown in FIG. 3, each of which has a recess 31 assigned to it.
  • this configuration is not binding; rather, more than four or fewer than four recesses could also be provided, which may also be in a different association with the injection openings 16.
  • the fuel injection valve will close and the fuel located in the passage opening 27 and the recesses 31 will migrate radially outward into the recesses 31 and there will at least be due to the capillary action the higher-boiling components of the fuel remain, so that no fuel deposits occur at the injection openings 16 and in the passage opening 27.

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

Les couvercles protecteurs de soupapes d'injection de carburant comprennent un orifice de passage aligné avec l'orifice d'injection. Lorsque l'on arrête le moteur à combustion interne, des éléments à point élevé d'ébullition du carburant provoquent des incrustations dans cet orifice de passage, réduisant sa section transversale ou même recouvrant partiellement l'orifice d'injection. Le couvercle protecteur (20) décrit comprend un évidement (29) qui s'étend radialement de l'orifice de passage (27) vers l'extérieur. Cet évidement est si étroit qu'il exerce un effet de capillarité sur le carburant, de sorte que lorsque le moteur à combustion interne est arrêté, les éléments à point d'ébullition élevé du carburant se déposent sur le bord radial extérieur de l'évidement, suite à l'effet de capillarité, et l'orifice d'injection (16) reste libre d'incrustations. Ce couvercle protecteur peut être utilisé avec différents types de soupapes d'injection de carburant.
EP90910107A 1989-08-19 1990-07-11 Soupape d'injection de carburant Expired - Lifetime EP0538247B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3927390 1989-08-19
DE3927390A DE3927390A1 (de) 1989-08-19 1989-08-19 Kraftstoffeinspritzventil
PCT/DE1990/000518 WO1991002898A1 (fr) 1989-08-19 1990-07-11 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP0538247A1 true EP0538247A1 (fr) 1993-04-28
EP0538247B1 EP0538247B1 (fr) 1995-01-11

Family

ID=6387423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90910107A Expired - Lifetime EP0538247B1 (fr) 1989-08-19 1990-07-11 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US5193747A (fr)
EP (1) EP0538247B1 (fr)
JP (1) JP2837270B2 (fr)
KR (1) KR0167114B1 (fr)
DE (2) DE3927390A1 (fr)
ES (1) ES2067034T3 (fr)
WO (1) WO1991002898A1 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69201740T2 (de) * 1991-03-08 1995-07-13 Ford Werke Ag Brennstoffeinspritzdüse mit Silikondüse.
US5350119A (en) * 1993-06-01 1994-09-27 Siemens Automotive L.P. Clad metal orifice disk for fuel injectors
JP3440534B2 (ja) * 1994-03-03 2003-08-25 株式会社デンソー 流体噴射ノズル
JPH0842428A (ja) * 1994-07-29 1996-02-13 Zexel Corp 衝突型燃料噴射ノズルおよびその製造方法
DE19522284B4 (de) * 1995-06-20 2007-05-10 Robert Bosch Gmbh Brennstoffeinspritzventil
JP3134813B2 (ja) * 1997-06-20 2001-02-13 トヨタ自動車株式会社 内燃機関の燃料噴射弁
DE19927898A1 (de) 1999-06-18 2000-12-21 Bosch Gmbh Robert Brennstoffeinspritzventil
KR100618069B1 (ko) * 1999-11-08 2006-08-29 에스케이 주식회사 디젤엔진용 연료 분사기
JP2002130087A (ja) 2000-10-23 2002-05-09 Toyota Motor Corp 筒内噴射式内燃機関用燃料噴射弁
DE10130685A1 (de) 2001-06-26 2003-01-02 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10142299A1 (de) * 2001-08-29 2003-04-17 Bosch Gmbh Robert Brennstoffeinspritzsystem
DE10142974B4 (de) * 2001-09-01 2010-04-29 Robert Bosch Gmbh Brennstoffeinspritzventil
JP3969247B2 (ja) * 2001-11-06 2007-09-05 株式会社デンソー 燃料噴射弁
DE10321148A1 (de) * 2003-05-12 2004-12-02 Robert Bosch Gmbh Brennstoffeinspritzventil
US20060010886A1 (en) * 2004-07-14 2006-01-19 Clamage Eric D Liquid cryogen dosing system with nozzle for pressurizing and inerting containers
CN101581265B (zh) * 2005-04-18 2011-07-20 株式会社电装 燃料喷射阀
JP4505824B2 (ja) * 2005-04-18 2010-07-21 株式会社デンソー 燃料噴射弁
US7828232B2 (en) * 2005-04-18 2010-11-09 Denso Corporation Injection valve having nozzle hole
KR100718253B1 (ko) * 2005-08-17 2007-05-16 삼성전자주식회사 불휘발성 메모리 장치의 제조 방법
JP2007146828A (ja) * 2005-10-28 2007-06-14 Hitachi Ltd 燃料噴射弁
EP3051116B1 (fr) * 2013-09-26 2020-03-11 Enplas Corporation Structure de fixation d'une plaque de buses pour un dispositif d'injection de carburant
US10641223B2 (en) * 2013-10-01 2020-05-05 Enplas Corporation Attachment structure of fuel injection device nozzle plate
DE102015206854A1 (de) * 2014-07-10 2016-01-14 Continental Teves Ag & Co. Ohg Ventilsitzträger

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Publication number Priority date Publication date Assignee Title
US2121948A (en) * 1935-05-11 1938-06-28 Western Electric Co Burner
GB1283205A (en) * 1969-09-30 1972-07-26 Griffiths Fuel Injection Dev L Improvements relating to fuel injection apparatus for internal combustion engines
US4057190A (en) * 1976-06-17 1977-11-08 Bendix Corporation Fuel break-up disc for injection valve
DE2900176A1 (de) * 1979-01-04 1980-07-24 Bosch Gmbh Robert Einspritzventil fuer kraftstoffeinspritzanlagen
DE3012416A1 (de) * 1980-03-29 1981-10-15 Robert Bosch Gmbh, 7000 Stuttgart Einspritzventil
JPS58143163A (ja) * 1982-02-17 1983-08-25 Isuzu Motors Ltd エンジン用燃料噴射ノズル
DE3540660A1 (de) * 1985-11-16 1987-05-21 Bosch Gmbh Robert Elektromagnetisch betaetigbares kraftstoffeinspritzventil
DE8632002U1 (de) * 1986-11-28 1988-03-31 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzventil
DE8802464U1 (de) * 1988-02-25 1989-06-22 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzventil
KR930004967B1 (ko) * 1988-07-13 1993-06-11 가부시기가이샤 히다찌세이사꾸쇼 전자식 연료 분사밸브

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9102898A1 *

Also Published As

Publication number Publication date
DE59008272D1 (de) 1995-02-23
KR920701665A (ko) 1992-08-12
EP0538247B1 (fr) 1995-01-11
DE3927390A1 (de) 1991-02-21
JP2837270B2 (ja) 1998-12-14
ES2067034T3 (es) 1995-03-16
JPH04501296A (ja) 1992-03-05
WO1991002898A1 (fr) 1991-03-07
KR0167114B1 (ko) 1998-12-15
US5193747A (en) 1993-03-16

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