EP0076459B1 - Soupape électromagnétique, notamment soupape d'injection de combustible - Google Patents

Soupape électromagnétique, notamment soupape d'injection de combustible Download PDF

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Publication number
EP0076459B1
EP0076459B1 EP82108989A EP82108989A EP0076459B1 EP 0076459 B1 EP0076459 B1 EP 0076459B1 EP 82108989 A EP82108989 A EP 82108989A EP 82108989 A EP82108989 A EP 82108989A EP 0076459 B1 EP0076459 B1 EP 0076459B1
Authority
EP
European Patent Office
Prior art keywords
armature
solenoid valve
valve according
stop plate
cylinder
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
Application number
EP82108989A
Other languages
German (de)
English (en)
Other versions
EP0076459A1 (fr
Inventor
Asta Hascher-Reichl
Hans Kubach
Werner Gross
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 EP0076459A1 publication Critical patent/EP0076459A1/fr
Application granted granted Critical
Publication of EP0076459B1 publication Critical patent/EP0076459B1/fr
Expired 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
    • F02M51/0664—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
    • F02M51/0675—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 the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • 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
    • 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

  • the invention is based on a solenoid valve, in particular a fuel injection valve according to the preamble of the main claim.
  • a fuel injection valve is already known from DE-A-3 046 889.4, in which the valve part connected to the flat armature protrudes through a central guide opening of a guide membrane.
  • the guide membrane guides the valve part in a radial direction to the valve seat.
  • the flat anchor touches the guide membrane under spring tension with a concentric guide edge and is thus guided plane-parallel to the end face of the core designed as a shell core.
  • the fuel is supplied to the valve through radial inflow openings in the valve wall. After flowing through the magnetic part, the unassigned fuel can reach a fuel return flow line via radial discharge openings that are axially offset and sealed with respect to the inflow openings.
  • this fuel injection valve has a large mass overall.
  • the air gaps that form the anchor with the shell core are very far apart in terms of their circumference, so that the anchor must have a large diameter, which increases its mass and reduces its flexural rigidity.
  • the guidance of the valve part and the armature is not always sufficient despite the guide membrane.
  • a solenoid valve according to the preamble of claim 1 is known from DE-A-1 451 955.
  • the valve shown there has, as an anchor, a flat anchor which is provided with two ring webs of the same web height which are concentrically arranged with respect to one another and which are arranged opposite the same width of the webs from the magnetically conductive cover of the electromagnet.
  • the annular air gap of the magnetic circuit lies between them.
  • the width of the air gap is considerably larger than the maximum air gap width to the flat anchor bridging this annular gap.
  • the ring webs provided in the known flat armature are mainly designed to enable precise machining of the armature on its air gap side to the electromagnet and to be able to carry out exact distances from the magnet core there.
  • the object of the invention is to develop a solenoid valve with which very short switching times can be achieved with small dimensions and low-loss operation.
  • the solenoid valve according to the invention with the characterizing features of the main claim has the advantage over the known valves that its mass and thus its weight is low. Due to the special design of the magnetic circuit, the solenoid valve has very short switching times.
  • the shape of the armature means that the distance between the air gaps with respect to the diameter of the armature is small. This takes advantage of the well-known flat anchor (double force with the same magnetic flux through two force-generating air gaps) without its disadvantage, namely the fact that the outer gap is geometrically very wide, which increases the anchor mass and reduces the bending stiffness of the anchor bring.
  • a sufficient spatial separation for reducing the magnetic stray flux is present in the present invention in that the air gaps are offset, as seen in the axial direction.
  • the armature in the embodiment according to the invention practically forms a flange which lies in the natural guidance of the magnetic flux lines deflected from the cylindrical inner part to the cover plate.
  • the leakage flow is significantly reduced.
  • the inside diameter of the cover plate can be kept very small; the largest outer diameter of the armature and its mass are then chosen to be correspondingly small.
  • the inner diameter of the magnetic circuit is expanded by the arrangement of the guide bush and the spring within the inner cylinder. This increases the circumferential length of the air gaps in the same area, which increases the magnetic force with a constant wall thickness.
  • the one bearing point of the valve tappet in the cylinder bore is in the immediate vicinity of the air gaps, so that only small tilting forces arise due to tolerances in the air gaps. This allows the armature to be built easily and receives a very high and easily damped mechanical natural frequency.
  • the construction according to the invention largely keeps the mechanical forces away from the magnetic circuit, so that the magnetic parts can be made as thin as is optimal for the magnetic circuit alone. Due to the larger mass of the stop plate compared to the mass of the armature with the valve body, the impact is mechanically fast damped, whereby the raised parts of the stop plate support the damping. The armature strikes the stop plate in the area of the disk-shaped head of the valve body, which is made of antimagnetic and mechanically hard material, so that a long service life is guaranteed.
  • the functionally important data such as stroke and switching time can be set inexpensively by plastic deformation on the annular grooves in the stop plate and in the annular magnetic plate.
  • This data can be preset by pairing the dimensional tolerances of the annular magnetic plate and the magnetic armature.
  • the magnetic conductors adjacent to the air gaps are made of magnetic material with high saturation induction, while the remaining parts of the magnetic circuit are made of magnetic material with the most favorable dynamic properties.
  • valve tappet can be machined with the magnetic armature as well as the cylinder bore in the guide bush with the valve seat in one set-up, so that circular symmetry is forced.
  • 1 denotes the valve housing.
  • a core 2 made of ferromagnetic material is provided inside the valve housing 1, on which a conductor coil 3 is applied.
  • the core 2 has an inner cylinder 4 and an outer cylinder 5, which are arranged concentrically to one another.
  • Inner cylinder 4 and outer cylinder 5 are magnetically conductively connected to one another on one end face via a yoke 6.
  • the other end face is partially covered by a magnetically conductive annular plate 7 which is magnetically connected to the outer cylinder 5.
  • the inner cylinder 4 carries a bobbin 8, on which the conductor coil 3 is wound, which takes up the entire space between the inner and outer cylinders 4, 5.
  • the magnetic circuit interrupted between the inner cylinder 4 and the annular plate 7 is bridged by an armature 10.
  • the armature 10 has a plate-shaped part 11 which merges into a hollow cylindrical connecting piece 12.
  • the connecting piece 12 faces one end face of the inner cylinder 4.
  • the edge of the plate-shaped part 11 protrudes beyond the annular plate 7 and forms with it the second air gap 14.
  • the guide bushing 21 merges into an antimagnetic part 22, which has the inlet 23 and the outlet bores 24 in extension to the cylinder bore 20 of the guide bushing 21.
  • the drain holes 24 open into a cavity 25, which is formed by the anti-magnetic part 22 and the core 2.
  • the inlet 23 ends in a valve chamber 26 which is connected to the cavity 25 by a connecting bore 27.
  • the valve body 15 cooperates with its spherical end 28 with a valve seat 29 which is arranged between the valve chamber 26 and the inlet 23.
  • the O-rings 30 seal the high pressure in the area 31 against the low liquid pressure (return pressure) in the valve chamber 26, the connecting bore 27, the cavity 25, the drain holes 24 and all other cavities of the solenoid valve.
  • a gap 32 is provided between the anti-magnetic part 22, a part of the outer cylinder 5 and the valve housing 1.
  • a pressure relief bore 33 is located between the cavity 25 and the gap 32.
  • the coil space 34 is cooled with liquid via the gap 32 and a bore 50 which is provided in the outer cylinder and connects the coil space 34 with the gap 32.
  • the guide bushing 21 has a recess on its outer jacket, into which a spring 35 is let in and which at its other end presses against the disk-shaped head 16 of the valve body 15 let into the plate-shaped part 11 of the armature 10.
  • the spring 35 supports the hydraulic pressure on the spherical end 28 of the plunger 17 in such a way that the valve opens quickly when the power is switched off and remains in this position even without pressure.
  • a stop plate 36 is provided above the armature 10 and the annular plate 7. With the help of this stop plate 36, the impact is quickly dampened when the valve is opened.
  • the stop plate 36 has a raised shoulder 37 in the area of the impact, so that the anchor 10 only hits a defined surface area.
  • This approach 37 lies opposite the disk-shaped head 16 made of hard antimagnetic material, which is pressed into the armature 10, so that wear is only very slight even when the solenoid valve is used for a long time.
  • a groove 38 is provided in the stop plate 36, which weakens the anti-magnetic stop plate 36 to such an extent that it can be adjusted of the system can be plastically deformed there.
  • Another groove 39 is provided in the annular plate 7 made of magnetic material, which can be plastically deformed at the point in such a way that the second air gap 14 can be set functionally. This deformation should be possible after the mounting of the stop plate 36, so that the stop plate 36 is broken through in order to apply the forces to the top of the annular plate 7.
  • the solenoid valve is closed off by a metallic cover plate 40 and by an electrically insulating plastic part 41 applied above it, which are let into the valve housing 1.
  • the connecting pins 43 are injected into the plastic part 41 with the plug guides 42.
  • the electrical connection of the connection pins 43 to the coil 3 takes place via the current leads 44. These are injected into the coil body 8.
  • the electrical conductor wires 45 of the coil 3 are wound at their ends around a pin 46, which is part of the coil body 8, in order to ensure strain relief.
  • the end of the conductor wire 45 is welded to a flag of the power supply 44, not shown.
  • the power supply 44 is inserted into the electrically conductive connecting pin 43 via a bend 47 for strain relief.
  • the antimagnetic part 22 in the region 48 is designed so strongly that the force can be applied to the circumference of the outer cylinder 5, even though it is as thin as one with regard to switching times, optimal magnet design is required.
  • a bore 49 is provided in the disk-shaped head 16 of the armature 10, through which the liquid displaced during the filling stroke of the plunger 17 can flow back as well as through the pressure relief bore 33.
  • the shoulder 51 of the magnetic outer cylinder 5 and the pole 52 of the magnetic inner cylinder 4 facing the first air gap 13 are of equal height in the axial direction.

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

Claims (12)

1. Soupape électromagnétique, notamment soupape d'injection de carburant, pour des installations d'injection de carburant de moteurs à combustion interne, avec un boîtier de soupape (1), avec un électro-aimant constitué d'un noyau (2) en un matériau ferromagnétique comportant un cylindre interne (4) et un cylindre externe (5) concentriques l'un à l'autre et entre lesquels est disposée la bobine conductrice (3) de l'électro-aimant, le circuit du flux magnétique étant complètement fermé sur une des faces frontales par une culasse (6) reliant de façon magnétiquement conductrice le cylindre interne (4) au cylindre externe (5), tandis que sur l'autre face frontale ce circuit est susceptible d'être fermé par une armature magnétiquement conductrice (10) s'étendant radialement et qui est reliée à un organe de fermeture (15) de la soupape magnétique guidé co-axialement à travers le cylindre interne (14), et par une plaque de recouvrement (7) s'étendant sur une partie de cette face frontale, soupape électromagnétique caractérisée en ce que l'armature est en forme de collerette avec un manchon tubulaire (12) qui, en ménageant un premier intervalle d'air de fonctionnement (13), se raccorde axialement au cylindre interne (4) dont la face frontale (52) délimitant ce premier intervalle d'air de travail (13) se situe à l'extérieur d'un plan constitué par la plaque de recouvrement (7), et avec une partie en forme de parasol (11) s'étendant radialement et dont le bord empiète sur la plaque de recouvrement (7) de forme annulaire circulaire, en ménageant à cet endroit avec le plan précité de la plaque de recouvrement (7), un second intervalle d'air de travail (14), l'organe de fermeture (15) de la soupape étant relié à l'armature (10) par l'intermédiaire d'une tête (16) en forme de disque, muni d'ouvertures axiales (49) et pénétrant à l'intérieur du manchon tubulaire (12), et cet organe de fermeture étant guidé par une douille de guidage (21) insérée dans le cylindre interne (4) et comportant un évidement dans lequel est disposé un ressort maintenu entre la douille de guidage (21) et l'armature (10).
2. Soupape électromagnétique selon la revendication 1, caractérisée en ce que le cylindre interne (4), la plaque annulaire circulaire (7) et l'armature (10) sont constituées d'un matériau à induction de saturation magnétique élevée.
3. Soupape électromagnétique selon la revendication 1 ou 2, caractérisée en ce que la tête en forme de disque (16) est insérée à la presse et/ou soudée dans la partie (11) en forme d'écran de l'armature (10).
4. Soupape électromagnétique selon la revendication 3, caractérisée en ce que l'organe de fermeture (15) de la soupape est constitué d'un matériau antimagnétique, et comporte un coulisseau (17) avec deux portées (18, 19) grâce auxquelles ce coulisseau est guidé dans l'alésage cylindrique (20) de la douille de guidage (21), une (18) de ces portées étant au voisinage immédiat du premier intervalle d'air (13).
5. Soupape électromagnétique selon une des revendications 2 à 4, caractérisée en ce qu'au-dessus de l'armature (10) il est prévu une plaque de butée (36) en un matériau anti-magnétique dur, plaque sur laquelle vient en butée l'armature (10).
6. Soupape électromagnétique selon la revendication 5, caractérisée en ce que l'armature (10) vient en butée sur la plaque de butée (36) dans la zone de la tête en forme de disque (16).
7. Soupape électromagnétique selon la revendication 6, caractérisée en ce que la plaque de butée (36) comporte une rainure de forme annulaire (38).
8. Soupape électromagnétique selon une des revendications 1 à 7, caractérisée en ce que la plaque annulaire circulaire (7) comporte une rainure annulaire (39).
9. Soupape électromagnétique selon la revendication 7, caractérisée en ce que la masse de la plaque de butée (36) est plusieurs fois supérieure à la masse de l'armature (10) avec le corps de soupape (15).
10. Soupape électromagnétique selon une des revendications 7 ou 9, caractérisée en ce qu'une partie de la zone de la plaque de butée (36) sur laquelle l'armature (10) vient en butée, est en saillie.
11. Soupape électromagnétique selon la revendication 10, caractérisée en ce que la plaque de butée (36) est perforée.
12. Soupape électromagnétique selon la revendication 4, caractérisée en ce que la douille de guidage (21) se prolonge dans la partie (22) du boîtier comportant le siège de soupape (29) et les alimentations et les évacuations hydrauliques (23,24).
EP82108989A 1981-10-06 1982-09-29 Soupape électromagnétique, notamment soupape d'injection de combustible Expired EP0076459B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3139669 1981-10-06
DE19813139669 DE3139669A1 (de) 1981-10-06 1981-10-06 Magnetventil, insbesondere kraftstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP0076459A1 EP0076459A1 (fr) 1983-04-13
EP0076459B1 true EP0076459B1 (fr) 1986-02-19

Family

ID=6143492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82108989A Expired EP0076459B1 (fr) 1981-10-06 1982-09-29 Soupape électromagnétique, notamment soupape d'injection de combustible

Country Status (4)

Country Link
US (1) US4475690A (fr)
EP (1) EP0076459B1 (fr)
JP (1) JPS5872782A (fr)
DE (2) DE3139669A1 (fr)

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NL8300018A (nl) * 1983-01-04 1984-08-01 Wientjes Kunststoff Hydropneumatisch massagebad met pulserende-circulatiewater-straalsysteem.
DE3332822A1 (de) * 1983-09-12 1985-03-28 Robert Bosch Gmbh, 7000 Stuttgart Magnetventil mit unelastischer ventildichtung
DE3523536A1 (de) * 1984-09-14 1986-03-27 Robert Bosch Gmbh, 7000 Stuttgart Elektrisch gesteuerte kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3581160D1 (de) * 1984-09-14 1991-02-07 Bosch Gmbh Robert Elektrisch gesteuerte kraftstoffeinspritzpumpe fuer brennkraftmaschinen.
DE3442750A1 (de) * 1984-11-23 1986-05-28 Robert Bosch Gmbh, 7000 Stuttgart Magnetventil zur fluidsteuerung
GB8430259D0 (en) * 1984-11-30 1985-01-09 Lucas Ind Plc Electromagnetically operable valve
DE3500449A1 (de) * 1985-01-09 1986-07-10 Robert Bosch Gmbh, 7000 Stuttgart Magnetventil zur fluidsteuerung
DE3510222A1 (de) * 1985-03-21 1986-09-25 Robert Bosch Gmbh, 7000 Stuttgart Magnetventil, insbesondere kraftstoffmengensteuerventil
JPH0692743B2 (ja) * 1985-04-01 1994-11-16 日本電装株式会社 流体制御用電磁弁
JPS62151681A (ja) * 1985-12-25 1987-07-06 Nippon Denso Co Ltd 流体制御用電磁弁
IT1187924B (it) * 1986-02-19 1987-12-23 Weber Spa Valvola ad azionamento elettromagnetico per la dosatura e la polverizzazione del carburante per un dispositivo di alimentazione di un motore a combustione interna
JPS6313977A (ja) * 1986-07-07 1988-01-21 Nippon Denso Co Ltd ソレノイド装置
DE3810826A1 (de) * 1988-03-30 1989-10-12 Pierburg Gmbh Elektromagnetisches einspritzventil fuer brennkraftmaschinen
DE3834444A1 (de) * 1988-10-10 1990-04-12 Mesenich Gerhard Elektromagnetisches einspritzventil mit membranfeder
IT220460Z2 (it) * 1990-06-29 1993-09-22 Weber Srl Perfezionamento alle valvole dosatrici e polverizzatrici di carburante ad azionamento elettromagnetico per un dispositivo di alimentazione di un motore a combustione interna.
DE4111886C2 (de) * 1991-04-09 1993-10-28 Mannesmann Ag Magnetventil
WO1996041947A1 (fr) * 1995-06-08 1996-12-27 Siemens Automotive Corporation Procede d'ajustage d'un entrefer d'un electro-aimant
US5927614A (en) * 1997-08-22 1999-07-27 Touvelle; Matthew S. Modular control valve for a fuel injector having magnetic isolation features
DE59909745D1 (de) * 1998-09-24 2004-07-22 Bosch Gmbh Robert Elektromagnetisch betätigbares, hydraulisches proportionalventil
DE19852980A1 (de) * 1998-11-17 2000-05-18 Bosch Gmbh Robert Ventil zum dosierten Einleiten von verflüchtigtem Brennstoff
US6360960B1 (en) * 2000-05-17 2002-03-26 Siemens Automotive Corporation Fuel injector sac volume reducer
DE10107115B4 (de) * 2001-02-14 2004-09-30 Robert Bosch Gmbh Drucksteuerventil
US6681728B2 (en) * 2001-11-05 2004-01-27 Ford Global Technologies, Llc Method for controlling an electromechanical actuator for a fuel air charge valve
JP4072696B2 (ja) * 2005-12-21 2008-04-09 東海ゴム工業株式会社 流体封入式能動型防振装置
JP5948792B2 (ja) * 2011-10-27 2016-07-06 アイシン精機株式会社 燃料電池用排気排水弁
JP6103096B2 (ja) * 2016-03-14 2017-03-29 アイシン精機株式会社 燃料電池用排気排水弁
CN114263553B (zh) * 2021-12-21 2022-06-21 南岳电控（衡阳）工业技术股份有限公司 用于空气辅助缸内直喷系统且采用电磁控制的燃料喷嘴

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US2881980A (en) * 1957-05-10 1959-04-14 Bendix Aviat Corp Fuel injection nozzle
GB1038541A (en) * 1962-06-07 1966-08-10 Ass Eng Ltd Fuel injection systems for internal combustion engines
GB1064679A (en) * 1962-12-03 1967-04-05 Ass Eng Ltd Fuel injectors for internal combustion engines
DE2342109C2 (de) * 1973-08-21 1983-10-27 Robert Bosch Gmbh, 7000 Stuttgart Elektromechanisch gesteuertes Kraftstoffeinspritzventil für Brennkraftmaschinen
JPS5439907B2 (fr) * 1973-09-11 1979-11-30
US4373671A (en) * 1981-04-13 1983-02-15 Ford Motor Company Electromagnetic fuel injector

Also Published As

Publication number Publication date
EP0076459A1 (fr) 1983-04-13
US4475690A (en) 1984-10-09
JPS5872782A (ja) 1983-04-30
JPH0345267B2 (fr) 1991-07-10
DE3269204D1 (de) 1986-03-27
DE3139669A1 (de) 1983-04-21

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