WO1988004727A1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

Info

Publication number
WO1988004727A1
WO1988004727A1 PCT/GB1987/000853 GB8700853W WO8804727A1 WO 1988004727 A1 WO1988004727 A1 WO 1988004727A1 GB 8700853 W GB8700853 W GB 8700853W WO 8804727 A1 WO8804727 A1 WO 8804727A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve member
seat
flange
face
core member
Prior art date
Application number
PCT/GB1987/000853
Other languages
English (en)
Inventor
Paul Stuart Renowden
Original Assignee
Lucas Industries Public Limited Company
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 Lucas Industries Public Limited Company filed Critical Lucas Industries Public Limited Company
Publication of WO1988004727A1 publication Critical patent/WO1988004727A1/fr

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
    • F02M51/0639—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 acting as a 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection

Definitions

  • This invention relates to an electromagnetically controlled fuel injector for supplying fuel to a spark ignition engine and has for its object to provide such an injector in a simple and convenient form.
  • Figure 1 is a sectional side elevation of one example of an injector in accordance with the invention.
  • Figure 2 is a view to an enlarged scale of part of the injector seen in Figure 1,
  • Figure 3 is a view similar to Figure 2 showing a modified form of injector.
  • FIGs 4 and 6 show modifications of the injector of Figure 2
  • Figures 5 and 7 show modifications of the injector of Figure 3.
  • the injector comprises a hollow cylindrical body 10 which is formed from magnetic material and which defines an internal step 11. Located against the step is a coil former 12 upon which is wound an annular winding 13. Also provided is a core member 14 which is formed from magnetic material and which has an integral flange 15 which fits into the wider end of the body and is secured therein by a weld 16. A seal member 17 is interposed between the former 12 and the step defined between the core member 14 and the flange 15 and a further seal member 18 is located between the former and the step 11.
  • the core member 14 extends beyond the wider end of the body to define a fuel inlet 19 and in addition, the core member is provided with a central passage 20 within which is fitted a bush 21 which serves as an abutment for one end of a coiled compression spring 22.
  • the bush 21 is an interference fit within the bore whereby the force exerted by the compression spring can be adjusted.
  • the body defines an annular flange 24 which extends inwardly from the inner surface of the body and which is located beyond the end face of the core member.
  • An annular guide member 25 is positioned between the flange 24 and the core member.
  • the guide member is formed from non-magnetic material and is located about a reduced end portion of the core member.
  • the guide member has an internal apertured flange 26 which locates against the end face 23 of the core member.
  • a seat member 27 which may be formed from plastics or other non-magnetic material and which is located against the flange 24 and is secured in position by means of a tubular insert 28 which extends beyond the end of the body 10 as more clearly seen in Figure 1.
  • the seat member is provided with a central opening 29 and on its face presented to the core member there is formed an annular seat element 30 which surrounds the flared end of the opening.
  • armature 31 Located between the seat element 30 and the core member is disc-like armature 31 formed from magnetic material.
  • the armature is located with clearance within the opening defined by the flange 24.
  • the armature 31 is provided with a recess in its face remote from the seat member, the recess serving to locate the end of the spring 22 and in addition a deeper recess 32 is also formed in the face of the valve member, the latter also being provided with passage means extending from the recess 32 and opening onto the opposite face of the valve member at a position or positions lying outside the seat element 30.
  • the passage means comprises passages 33.
  • the valve member in the closed position as shown is partly located within the tubular guide member 25.
  • the spring 22 urges the valve member into engagement with the seat element 30 to prevent flow of fuel through the opening 29 until such time as the winding 13 is energised.
  • the flange 24 and the core member 14 assume opposite magnetic polarity and the magnetic flux flows between the inner edge of the flange 24 and the valve member across a small generally radial air gap and then from the valve member 31 to the face 23 across an air gap slightly larger in size but extending axially.
  • An axial force is therefore developed upon the valve member and the latter moves axially against the force exerted by the spring 22 to an open position which is determined by the abutment of the valve member with the flange of the guide member 25.
  • valve member Once the valve member has lifted from the seat element, fuel can flow through the opening 29 and it is arranged that the fuel pressure is sufficiently high to ensure that a fuel spray is produced which since the injector is mounted in the air inlet manifold of the associated engine, is directed into the air flowing to the engine.
  • the armature When the winding is de-energised the armature is returned by the action of the spring into contact with the seat element 30 so that flow of fuel through the opening is halted.
  • the guide member and its flange acts to prevent metal-to-metal contact between the valve member and the face 23 so as to avoid any tendency for the valve member to magnetically stick to the core member.
  • the smaller diameter valve member which results by adopting the construction described means that the valve member is lighter and it has been possible to reduce the contact area between the valve member 31 and the seat element 30 and also between the valve member and the flange 26 thereby reducing the tendency for the valve member to stick in the open and closed positions.
  • the injector which is shown in Figure 3 differs only in the fact that the seat member 34 is provided with three orifices 35 which are equiangularly spaced about the axis of the seat member.
  • the face of the seat member presented to the valve member is recessed so that the entrance to each orifice is defined by an annular seat element 36 which is engaged by the valve member 37.
  • the valve member 37 is provided with a central opening 38 extending between the opposite faces of the valve member.
  • the seat elements 36 are obturated by the valve member and of course are uncovered when the valve member is moved away from the seat member upon energisation of the winding.
  • Figures 6 and 7 show further modifications of the arrangements of Figures 2 and 3 and in these cases the side faces of the valve member and the flange 24 are inclined to produce an air gap, flow of flux across which will produce a force component acting in the direction to open the valve member.

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)

Abstract

Injecteur de carburant destiné à un moteur à allumage par étincelle comprenant une pièce tubulaire centrale (14) située dans un corps d'injecteur (10) dans lequel se trouve un enroulement. L'extrémité (23) de la pièce tubulaire centrale est espacée intérieurement d'une bride annulaire (24) du corps d'injecteur. Un organe de soupape (31) est monté dans une ouverture de la bride et est arrivée vers la pièce tubulaire centrale quand l'enroulement reçoit un courant d'excitation. le mouvement de l'organe de soupape est guidé par une pièce de guidage non magnétique (25) en forme d'anneau, qui s'insère autour d'une partie plus étroite de la pièce tubulaire centrale.
PCT/GB1987/000853 1986-12-23 1987-11-27 Injecteur de carburant WO1988004727A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8630686 1986-12-23
GB868630686A GB8630686D0 (en) 1986-12-23 1986-12-23 Fuel injector

Publications (1)

Publication Number Publication Date
WO1988004727A1 true WO1988004727A1 (fr) 1988-06-30

Family

ID=10609464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1987/000853 WO1988004727A1 (fr) 1986-12-23 1987-11-27 Injecteur de carburant

Country Status (4)

Country Link
EP (1) EP0294406A1 (fr)
JP (1) JPH01501646A (fr)
GB (1) GB8630686D0 (fr)
WO (1) WO1988004727A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2606830A1 (fr) * 1986-11-15 1988-05-20 Hitachi Ltd Injecteur electromagnetique de carburant
EP0301620A2 (fr) * 1987-07-27 1989-02-01 WEBER S.r.l. Injecteur électromagnétique de combustible pour moteurs à combustion interne
DE3943005A1 (de) * 1988-12-28 1990-07-05 Hitachi Ltd Elektromagnetische einspritzventilvorrichtung
WO1994019601A1 (fr) * 1993-02-16 1994-09-01 Siemens Automotive Corporation Injecteur de carburant
WO1996006279A1 (fr) * 1994-08-18 1996-02-29 Siemens Automotive Corporation Bobine d'injecteur de carburant soude de petit diametre
WO2004040125A1 (fr) * 2002-10-26 2004-05-13 Robert Bosch Gmbh Soupape de commande d'un fluide
WO2005040591A1 (fr) * 2003-10-07 2005-05-06 Med S.P.A. Injecteur a commande electrique pour carburant gazeux
WO2006034945A1 (fr) * 2004-09-29 2006-04-06 Robert Bosch Gmbh Soupape d'injection de carburant
EP1801410A1 (fr) * 2002-10-26 2007-06-27 Robert Bosch Gmbh Soupape de commande d'un fluide
RU2494281C1 (ru) * 2012-06-20 2013-09-27 Общество с ограниченной ответственностью "Газовая индустрия" Инжектор для подачи газового топлива

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6061074B2 (ja) * 2012-09-28 2017-01-18 株式会社ケーヒン 燃料噴射弁

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1664613A (en) * 1926-01-27 1928-04-03 Louis O French Electromagnetic valve
DE743620C (de) * 1939-01-20 1943-12-30 Aeroplani Caproni Societa Anon Elektromagnetisch gesteuertes Einspritzventil fuer Brennkraftmaschinen
US2988675A (en) * 1958-03-28 1961-06-13 Allied Control Co Solenoid-actuated device
DE2932433A1 (de) * 1979-08-10 1981-02-26 Bosch Gmbh Robert Einspritzventil fuer kraftstoffeinspritzanlagen
GB2073316A (en) * 1980-03-20 1981-10-14 Bosch Gmbh Robert Fuel injection installation for preventing vapour lock
US4360161A (en) * 1979-01-29 1982-11-23 The Bendix Corporation Electromagnetic fuel injector
GB2155693A (en) * 1984-03-05 1985-09-25 Gerhard Mesenich Electromagnetically actuated fuel injection valves
EP0172591A1 (fr) * 1984-07-12 1986-02-26 WEBER S.r.l. Electro-injecteur pour l'alimentation en combustible d'une machine à combustion interne

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1664613A (en) * 1926-01-27 1928-04-03 Louis O French Electromagnetic valve
DE743620C (de) * 1939-01-20 1943-12-30 Aeroplani Caproni Societa Anon Elektromagnetisch gesteuertes Einspritzventil fuer Brennkraftmaschinen
US2988675A (en) * 1958-03-28 1961-06-13 Allied Control Co Solenoid-actuated device
US4360161A (en) * 1979-01-29 1982-11-23 The Bendix Corporation Electromagnetic fuel injector
DE2932433A1 (de) * 1979-08-10 1981-02-26 Bosch Gmbh Robert Einspritzventil fuer kraftstoffeinspritzanlagen
GB2073316A (en) * 1980-03-20 1981-10-14 Bosch Gmbh Robert Fuel injection installation for preventing vapour lock
GB2155693A (en) * 1984-03-05 1985-09-25 Gerhard Mesenich Electromagnetically actuated fuel injection valves
EP0172591A1 (fr) * 1984-07-12 1986-02-26 WEBER S.r.l. Electro-injecteur pour l'alimentation en combustible d'une machine à combustion interne

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2606830A1 (fr) * 1986-11-15 1988-05-20 Hitachi Ltd Injecteur electromagnetique de carburant
US5012982A (en) * 1986-11-15 1991-05-07 Hitachi, Ltd. Electromagnetic fuel injector
EP0301620A2 (fr) * 1987-07-27 1989-02-01 WEBER S.r.l. Injecteur électromagnétique de combustible pour moteurs à combustion interne
EP0301620A3 (fr) * 1987-07-27 1990-02-07 WEBER S.r.l. Injecteur électromagnétique de combustible pour moteurs à combustion interne
DE3943005A1 (de) * 1988-12-28 1990-07-05 Hitachi Ltd Elektromagnetische einspritzventilvorrichtung
US5018501A (en) * 1988-12-28 1991-05-28 Hitachi, Ltd. Electromagnetic fuel injection valve apparatus
WO1994019601A1 (fr) * 1993-02-16 1994-09-01 Siemens Automotive Corporation Injecteur de carburant
CN1059950C (zh) * 1994-08-18 2000-12-27 美国西门子汽车公司 电动式喷油器
WO1996006279A1 (fr) * 1994-08-18 1996-02-29 Siemens Automotive Corporation Bobine d'injecteur de carburant soude de petit diametre
WO2004040125A1 (fr) * 2002-10-26 2004-05-13 Robert Bosch Gmbh Soupape de commande d'un fluide
EP1801410A1 (fr) * 2002-10-26 2007-06-27 Robert Bosch Gmbh Soupape de commande d'un fluide
WO2005040591A1 (fr) * 2003-10-07 2005-05-06 Med S.P.A. Injecteur a commande electrique pour carburant gazeux
US7464886B2 (en) 2003-10-07 2008-12-16 Med S.P.A. Electrically operated injector for gaseous fuel
CN100453791C (zh) * 2003-10-07 2009-01-21 Med公开有限公司 用于气体燃料的电力操作的喷射器
WO2006034945A1 (fr) * 2004-09-29 2006-04-06 Robert Bosch Gmbh Soupape d'injection de carburant
RU2494281C1 (ru) * 2012-06-20 2013-09-27 Общество с ограниченной ответственностью "Газовая индустрия" Инжектор для подачи газового топлива

Also Published As

Publication number Publication date
JPH01501646A (ja) 1989-06-08
GB8630686D0 (en) 1987-02-04
EP0294406A1 (fr) 1988-12-14

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