EP0215527B1 - Elektromagnetisches Brennstoffeinspritzventil für Verbrennungsmotoren und dessen Herstellungsverfahren - Google Patents

Elektromagnetisches Brennstoffeinspritzventil für Verbrennungsmotoren und dessen Herstellungsverfahren Download PDF

Info

Publication number
EP0215527B1
EP0215527B1 EP86201589A EP86201589A EP0215527B1 EP 0215527 B1 EP0215527 B1 EP 0215527B1 EP 86201589 A EP86201589 A EP 86201589A EP 86201589 A EP86201589 A EP 86201589A EP 0215527 B1 EP0215527 B1 EP 0215527B1
Authority
EP
European Patent Office
Prior art keywords
core
annular shoulder
armature
outer diameter
annular
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 - Lifetime
Application number
EP86201589A
Other languages
English (en)
French (fr)
Other versions
EP0215527A1 (de
Inventor
Luciano Ramacciotti
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.)
Weber SRL
Original Assignee
Weber SRL
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 Weber SRL filed Critical Weber SRL
Publication of EP0215527A1 publication Critical patent/EP0215527A1/de
Application granted granted Critical
Publication of EP0215527B1 publication Critical patent/EP0215527B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M51/0667—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 acting as a valve or having a short valve body attached thereto

Definitions

  • the present invention relates to an electroinjector for feeding fuel to an internal combustion engine, and to a process for the manufacturing thereof.
  • the invention relates to an electroinjector of the type comprising an encasing body, inside of which a cylindrical core is positioned of ferromagnetic material, at least partly surrounded by an actuator coil, a movable armature of ferromagnetic material, having a substantially hollow cylindrical shape and bearing at one of its ends a closure element suitable to interrupt, in one position of said armature, the passage of fuel through an injection nozzle under the action of a return spring, and an annular shoulder element of impact-resistant and at least partly amagnetic material, rigid with the core and projecting from an end surface thereof such as to act as a stop shoulder for an opposite end of said armature in another position of said armature in which the closure element leaves open the fuel passage through the injection nozzle, the armature being guided by a small tube rigidly inserted in a hollow cylindrical portion of the core and protruding therefrom and the annular shoulder element being driven on the end portion of the cylindrical portion of the core with diametrical interference, the outer diameter of said end portion
  • the annular shoulder element which instead of being mounted on the outer cylindrical wall of the end portion of the core may also be mounted on an inner cylindrical wall thereof, may be partly split in a longitudinal direction to allow elastic forcing of the annular element on the core into its final position, or it may be assembled against a shoulder provided on the end portion of the core, so arranged to cause the annular element to axially project from the end surface of the core by the desired amount.
  • the end surface of the annular shoulder element which may be hardened by a coating of a hard material, preferably titanium nitride, may be rounded or inclined through a certain angle instead of being flat and perpendicular to the axis of the element, so as to limit the contact area between the armature and the annular shoulder element in operation.
  • a hard material preferably titanium nitride
  • an electric commutator for pneumatic signals which comprises, like an electroinjector, a cylindrical core of ferromagnetic material surrounded by a coil, and a movable armature the axial position of which relative to the core is influenced by the energisation of the coil.
  • An annular shoulder element of amagnetic material is fixed on the core and projects therefrom to act as a stop for the armature.
  • an electroinjector of the type having a cylindrical core of ferromagnetic material and an armature movable relative thereto in an axial direction upon energisation of a coil surrounding the core is known from FR-A 2 532 005.
  • the armature is slidingly guided by a guide tube secured inside the cylindrical core and projecting therefrom.
  • a washer housed inside the armature near its lower end defines the stroke of the armature by abutting against the lower end of the guide tube.
  • This construction has even more critical problems of tolerances because the clearance between the armature and the core depends not only from the exact fixing position of the guide tube with respect to the end of the core in axial direction, but also from the exact fixing position of the washer with respect to the upper end of the armature in axial direction.
  • the purpose of the present invention is to provide an electroinjector of the type mentioned in the introduction, which can be obtained in a mass-production at competitive costs, while guaranteeing the observance of particularly precise dimensions, but without requiring the observance of severe tolerances for the dimensions of the individual components, but allowing on the contrary medium-precision processes to be adopted for components machining.
  • the above mentioned purpose is achieved in that in an electroinjector of the type mentioned in the introduction, the core has an approximately conically shaped transient zone between the smaller diameter core portion on which the annular shoulder element is driven, and the greater-diameter core portion, said transient zone being plastically deformed by the end of the annular shoulder element which penetrates in a generally axial direction of the core into said transient zone.
  • the plastic deformation is accomplished in the step of assembling the annular shoulder element on the core, by applying an impulsive action in an axial direction onto the annular shoulder element driven on the core, the action being such as to cause a plastic deformation of the transient zone of the core in a generally axial direction.
  • a deformable washer element is interposed in axial direction between the annular shoulder element and a stop shoulder of the core, the washer element having an outer diameter greater than the outer diameter of the cylindrical portion of said core and being pressed onto the stop shoulder thereby having a plastically deformed end portion overlapping the periphery of said stop shoulder.
  • manufacturing of the electroinjector is accomplished by interposing the washer shoulder element and the stop shoulder of the core and then applying an impulsive action onto the annular shoulder element in an axial direction thereof such as to cause a plastic deformation of the washer element in a generally axial direction thereof.
  • the component elements (the core and the annular element) manufactured with medium- precision processes, which would allow a dimensional variability of the clearance of, e.g., 150 ⁇ , are made assume, in the assembly step, mutual positions securing the observance of the dimensions required for the correct operating of the electroinjector.
  • the low ratio existing between the fitting length and the diameter of the annular element secures, in the driving step, also the parallelism and the normality of the two elements being assembled.
  • an electroinjector of the type being the object of the present invention comprises a cylindrical core 10 of ferromagnetic material, housed inside an encasing body 11, it too of ferromagnetic material, and extending to the outside of the body 11 to form a fitting 10a to connect the injector to a fuel feed.
  • a movable armature 12 of ferromagnetic material is coaxially associated, which, together with the core 10 and the body 11, forms a magnetic circuit.
  • the core 10 is at least partly surrounded by a coil 13, wound around a bobbin 14, which is electrically fed, with intermittent drive, by means of conductors 15 partly embedded in a cap of plastics 16.
  • the movable armature 12 bears a closure element 17 with the interposition of a washer 18, and is guided by a tube 19 rigidly inserted in a hollow cylindrical portion of the core 10, but protruding out of it.
  • a spring 20 keeps the closure element 17 normally pressed against the shoulder of an injection nozzle 21, provided with a calibrated bore for the outlet of the fuel.
  • the spring 20 reacts against a sleeve 22 inserted with interference inside the core 10 and centrally open to allow the flow of the fuel.
  • annular spacer 23 is placed, substantially defining the stroke of the armature 12, which on its side facing towards the core 10 comes to stop against an annular shoulder element 24, of impact-resistant material, and at least partly amagnetic, mounted on the end portion of the cylindrical portion of the core 10 so as to axially protrude from the end of core 10.
  • annular shoulder element 24 of impact-resistant material, and at least partly amagnetic, mounted on the end portion of the cylindrical portion of the core 10 so as to axially protrude from the end of core 10.
  • the outer diameter of said end portion in smaller than the outer diameter of the cylindrical portion of the core 10 and the outer diameter of the annular shoulder element 24 is greater than the outer diameter of the cylindrical portion of the core 10. Owing to axial protrusion of element 24, a small clearance T, fig.
  • annular shoulder element 24 guarantees that phenomena of magnetic and/or hydraulic sticking, detrimental to the purpose of a quick closure of the injector, do not occur.
  • the hydraulic tightness is secured by seal rings 25, 26 and 36.
  • the fuel fed through the sleeve 22, arrives to bores 27 of the core 10 and then to bores 28 of the armature 12, from which the fuel flows to the outside of the nozzle 21.
  • the annular element 24, manufactured with medium precision, is driven on the end portion of the cylindrical portion of the core 10, it too manufactured with medium precision, by diametrical interference up to a certain axial position, and is then fixed in position by plastic deformation of a portion of the core 10 in an essentially axial direction, or by plastic deformation of an element interposed in axial direction between the annular element 24 and the core 10.
  • the core 10 is provided, its end portion on which the annular element 24 is to be driven, with an annular groove 29 between a smaller-diameter core portion 30 and a greater-diameter core portion 31, this latter being radiused to the main cylindrical portion of the core 10.
  • An approximately conically shaped transient zone is provided between the groove 29 and the portion 31 and represents in this embodiment the portion which on the end assemblage of the annular element 24 undergoes the plastic deformation, as it can be observed by comparing figs. 3 and 4, from which it can be noted that the transient zone is plastically deformed by the end of the annular shoulder element 24 which penetrates in a generally axial direction of the core 10 into said transient zone.
  • the affixing in the end position is carried out by means of an impulsive action on the annular element 24 with the interposition of a pusher 32, having a stem which is driven inside the core 10, and a head which rests against the front end of the annular element 24.
  • the head of the pusher 32 is advantageously provided, on its face facing the stem, with an annular step portion 44 of height H and of outer diameter slightly less than the inner diameter of the annular element 24, which step portion 44, by coming to rest against the front end surface of the core 10, determines the end of the axial stroke of pusher 32 and, consequently, the value of the end protrusion, or clearance T of fig. 2, of the annular element 24 from the front end surface of said core.
  • the dimension H of the step portion 44 is slightly different from the dimension T of desired clearance. Even in the complete absence of the step portion 44, a clearance T shall hence be formed, even if of the order of a few hundredths of millimeter only.
  • a tool which can be advantageously used for manufacturing the injector by providing said impulsive action is illustrated in figs. 7 and 8. It comprises a stationary support 33, on the upper part of which a mass 35 is hinged on a hinge 34, through a supporting rod 37. To the lower portion of the support 33, the core 10 is fixed in a correspondingly shaped seat 38, in such a way that the front end of the core 10, on which the annular element 24 has to be mounted, protrudes from the side facing towards the mass 35 on the trajectory of the same mass 35.
  • the core 10 is fixed by means of a ring nut 39 screwed down in a sleeve 40 fastened on the support 33.
  • a pin 41 is centrally fastened, suitable to act axially on the pusher 32 inserted in the core 10.
  • the arrangement is in fact such that the axis of the core 10 and of the annular element 24 coincides with the tangent to the trajectory of the centre of the pin 41 in the lowermost point of the same trajectory.
  • the annular element 24 can be driven on the core 10 by means of static pre- driving by press with a force of 90-110 kg, and the dynamic end driving can be obtained with a work of 0.07 kgm.
  • the plastic deformation is envisaged to occur on a deformable washer element 42, e.g., a copper washer, axially interposed between the annular shoulder element 24 and a flat stop shoulder 43 provided on the core 10, extending crosswise relatively to the axis of core 10.
  • the washer element 42 has an outer diameter greater than the outer diameter of the cylindrical portion of the core 10 and is pressed onto the stop shoulder 43 thereby having a plastically deformed end portion overlapping the periphery of the stop shoulder 43.
  • the end driving can be carried out in this case in a way analog to that described for the foregoing embodiment.

Landscapes

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

Claims (8)

1. Elektromagnetisches Brennstoffeinspritzventil für Verbrennungsmotoren, mit einem Gehäusekörper (11), in dem ein zylindrischer Kern (10) aus ferromagnetischem Material angeordnet ist, welcher zumindest teilweise von einer Erregerspule (13) umgeben ist, mit einem bewegbaren Anker (12) aus ferromagnetischem Material, welcher im wesentlichen hohlzylindrische Form aufweist und an einem seiner Enden ein Verschlußelement (17) trägt, welches in einer Stellung des Ankers (12) den Durchtritt von Kraftstoff durch eine Einspritzdüse (21) unter Einwirkung einer Rückholfeder (20) zu unterbrechen geeignet ist, und mit einem ringförmigen Schulterelement (24) aus stoßbeständigem und zumindest teilweise amagnetischem Material, welches Element fest mit dem Kern (10) ausgebildet ist und von einer Endfläche desselben vorragt, um als Anschlagschulter für ein gegenüberliegendes Ende des Ankers (12) in der anderen Position des Ankers (12) zu wirken, in welcher das Verschlußelement (17) die Kraftstoff-Durchtrittsöffnung durch die Einspritzdüse (21) offen hält, wobei der Anker (12) durch ein fest in den hohlzylindrischen Bereich des Kernes (10) eingesetztes und aus diesem hervorragendes Führungsrohr (19) geführt wird und das ringförmige Schulterelement (24) auf den Endbereich des zylindrischen Bereiches des Kernes (10) mit einer Durchmesser-Abstimmung aufgetrieben wird, wobei der Außendurchmesser des zylindrischen Bereiches des Kernes (10) und der Außendurchmesser des ringförmigen Schulterelementes (24) größer ist als der Außendurchmesser des zylindrischen Bereiches des Kernes (10), wobei der Kern (10) eine ungefähr konisch ausgebildete Übergangszone zwischen dem Kernbereich (30) mit geringerem Durchmesser, auf welchen das Schulterelement (24) aufgetrieben wird, und dem Kernbereich (31) mit größerem Durchmesser aufweist, wobei die Übergangszone durch das Ende des ringförmigen Schulterelementes (24) plastisch verformt wird, welches in im wesentlichen axialer Richtung des Kerns (10) in die Übergangszone eindringt.
2. Elektromagnetisches Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß eine ringförmige Nut (29) zwischen dem Bereich (30) mit geringerem Durchmesser und dem Übergangsbereich des Kernes (10) vorgesehen ist.
3. Elektromagnetisches Brennstoffeinspritzventil für Verbrennungsmotoren, mit einem Gehäusekörper (11), in dem ein zylindrischer Kern (10) aus ferromagnetischem Material angeordnet ist, welcher zumindest teilweise von einer Erregerspule (13) umgeben ist, mit einem bewegbaren Anker (12) aus ferromagnetischem Material, welcher im wesentlichen hohlzylindrische Form aufweist und an einem seiner Enden ein Verschlußelement (17) trägt, welches in einer Stellung des Ankers (12) den Durchtritt von Kraftstoff durch eine Einspritzdüse (21) unter Einwirkung einer Rückholfeder (20) zu unterbrechen geeignet ist, und mit einem ringförmigen Schulterelement (24) aus stoßbeständigem und zumindest teilweise amagnetischem Material, welches Element fest mit dem Kern (10) ausgebildet ist und von einer Endfläche desselben vorragt, um als Anschlagschulter für ein gegenüberliegendes Ende des Ankers (12) in der anderen Position des Ankers (12) zu wirken, in welcher das Verschlußelement (17) die Kraftstoff-Durchtrittsöffnung durch die Einspritzdüse (21) offen hält, wobei der Anker (12) durch ein starr in den hohlzylindrischen Bereich des Kernes (10) eingesetztes und aus diesem hervorragendes Führungsrohr (19) geführt wird und das ringförmige Schulterelement (24) auf den Endbereich des zylindrischen Bereiches des Kernes (10) mit einer Durchmesser-Abstimmung aufgetrieben wird, wobei der Außendurchmesser des Endbereiches kleiner ist als der Außendurchmesser des zylindrischen Bereiches des Kernes (10) und der Außendurchmesser des ringförmigen Schulterelementes (24) größer ist als der Außendurchmesser des zylindrischen Bereiches des Kernes (10), wobei ein deformierbares Beilagscheibenelement (42) in axialer Richtung zwischen dem ringförmigen Schulterelement (24) und einer Anschlagschulter (43) des Kerns (10) angeordnet ist, wobei das Beilagscheibenelement (42) einen größeren Außendurchmesser als den Außendurchmesser des zylindrischen Bereiches des Kerns (10) aufweist und die Anschlagschulter (43) aufgepreßt wird, so daß ein plastisch deformierter Endbereich den Umfang der Anschlagschulter (43) überlappt.
4. Verfahren zur Herstellung eines elektromagnetischen Brennstoffeinspritzventiles nach Anspruch 1, wobei das ringförmige Schulterelement (24) auf den Kern (10) des Einspritzventiles aufgetrieben wird, dadurch gekennzeichnet, daß es einen Schritt einer Anwendung einer Stoßbeanspruchung in axialer Richtung auf das auf den Kern (10) aufzutreibende ringförmige Schulterelement (24) umfaßt, wobei die Beanspruchung derart ist, um eine plastische Deformation der Übergangszone des Kernes (10) in im wesentlichen axialer Richtung zu bewirken.
5. Verfahren zur Herstellung eines elektromagnetischen Brennstoffeinspritzventiles nach Anspruch 3, wobei das ringförmige Schulterelement (24) auf den Kern (10) des Einspritzventiles aufgetrieben wird, dadurch gekennzeichnet, daß es die Schritte einer Anordnung eines Beilagscheibenelementes (42) in axialer Richtung zwischen dem ringförmigen Schulterelement (24) und der Anschlagschulter des Kernes (10) und der Anwendung einer Stoßbeanspruchung auf das ringförmige Schulterelement (24) in axialer Richtung desselben umfaßt, um eine plastische Deformation des Beilagscheibenelementes (42) in im wesentlichen axialer Richtung desselben zu bewirken.
6. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Stoßbeanspruchung dadurch vorgenommen wird, daß eine vorbestimmte Masse (35) aus einer vorbestimmten Höhe für eine axiale Einwirkung auf das auf den Kern (10) aufzutreibende ringförmige Schulterelement (24) fallengelassen wird.
7. Verwendung eines Werkzeuges zur Durchführung des Verfahrens nach einem der Ansprüche 4 bis 6, wobei das Werkzeug eine Stoßeinrichtung (32) mit einem in den Kern (10) des Einspritzventiles einführbaren Schaft und einen Kopf mit einem ringförmigen, abgestuften Bereich (44) auf der dem Schaft zugewandten Fläche aufweist, wobei der abgestufte Bereich (44) eine axiale Höhe, welche im wesentlichen gleich der axialen Abmessung eines vorbestimmten Abstandes zwischen der Endfläche des Kernes (10) und der Endfläche des von diesem vorragenden ringförmigen Schulterelementes (24) ist, sowie einen Außendurchmesser aufweist, welcher geringfügig kleiner als der Innendurchmesser des ringförmigen Schulterelementes (24) ist, und wobei die Druckeinrichtung (32) mit dem in den Kern (10) eingeführten Schaft einer Stoßbeanspruchung unterworfen wird, um den abgestuften Bereich (44) in Anlage an die Endfläche des Kernes (10) zu bringen.
8. Verwendung eines Werkzeuges nach Anspruch 7, welches weiter eine relativ zu einem stationären, den Kern (10) tragenden Support bewegbare Masse (35) umfaßt, wobei die Masse (35) zu einem Fall unter Einwirkung der Schwerkraft aus einer vorbestimmten Höhe auf die Druckeinrichtung (32), deren Schaft in den Kern (10) eingeführt ist, veranlaßt wird.
EP86201589A 1985-09-19 1986-09-16 Elektromagnetisches Brennstoffeinspritzventil für Verbrennungsmotoren und dessen Herstellungsverfahren Expired - Lifetime EP0215527B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2220685 1985-09-19
IT22206/85A IT1185353B (it) 1985-09-19 1985-09-19 Elettroiniettore per l'alimentazione di combustibile ad un motore a combustione interna e procedimento per la sua realizzazione

Publications (2)

Publication Number Publication Date
EP0215527A1 EP0215527A1 (de) 1987-03-25
EP0215527B1 true EP0215527B1 (de) 1990-08-29

Family

ID=11193034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86201589A Expired - Lifetime EP0215527B1 (de) 1985-09-19 1986-09-16 Elektromagnetisches Brennstoffeinspritzventil für Verbrennungsmotoren und dessen Herstellungsverfahren

Country Status (3)

Country Link
EP (1) EP0215527B1 (de)
DE (1) DE3673731D1 (de)
IT (1) IT1185353B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996041947A1 (en) * 1995-06-08 1996-12-27 Siemens Automotive Corporation Method of adjusting a solenoid air gap
EP0781915A1 (de) * 1995-12-26 1997-07-02 General Motors Corporation Kraftstoffeinspritzventil
US6047907A (en) * 1997-12-23 2000-04-11 Siemens Automotive Corporation Ball valve fuel injector
DE102005015409B4 (de) 2005-04-04 2019-01-03 Continental Automotive Gmbh Verfahren und Vorrichtung zur Vorgabe eines Abstands zwischen einem vorgegebenen ersten Bezugspunkt auf einem ersten Körper und einem vorgegebenen zweiten Bezugspunkt auf einem zweiten Körper und Körpervorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423841A (en) * 1982-01-28 1984-01-03 General Motors Corporation Electromagnetic fuel injector with pivotable armature stop

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1357551A (en) * 1970-05-12 1974-06-26 Vyzk Ustav Automat Prostredku Switch assembly with electrically operable fluid valve means
FR2241008A1 (en) * 1973-08-17 1975-03-14 Tech Haute Precision Electro-magnetic petrol injector with rapid action - has accurately controlled annular fuel passage
SE425224B (sv) * 1977-11-29 1982-09-13 Flygt Ab Sett att forbinda tva ringformiga element
US4311280A (en) * 1980-07-21 1982-01-19 General Motors Corporation Electromagnetic fuel injector with adjustable armature spring
IT1152503B (it) * 1982-08-18 1987-01-07 Alfa Romeo Spa Elettroiniettore per un motore a c.i.
IT1175561B (it) * 1984-07-12 1987-07-01 Spica Spa Elettroiniettore perfezionato per alimentare combustibile a un motore a c.i.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423841A (en) * 1982-01-28 1984-01-03 General Motors Corporation Electromagnetic fuel injector with pivotable armature stop

Also Published As

Publication number Publication date
IT1185353B (it) 1987-11-12
IT8522206A0 (it) 1985-09-19
DE3673731D1 (de) 1990-10-04
EP0215527A1 (de) 1987-03-25

Similar Documents

Publication Publication Date Title
US5040731A (en) Electromagnetic fuel injection and method of producing the same
US4915350A (en) Electromagnetically actuatable valve
US5127156A (en) Method for concentrically assembling a pair of cylindrical members and method for assembling a nozzle in a fuel injector
RU2215181C2 (ru) Регулируемый дозирующий клапан для топливного инжектора двигателя внутреннего сгорания
US6341412B1 (en) Methods of forming a sheath and plastic ring on a electromagnetically operated valve
US5301874A (en) Adjusting sleeve for an electromagnetically actuatable valve
US5127585A (en) Electromaagnetic high-pressure injection valve
US5165656A (en) Adjusting bush for an electromagnetically actuatable valve
EP0446214B1 (de) Elektromagnetisch betätigbares kraftstoff-einspritzventil mit einer membranfeder
US5359876A (en) Method for producing a nozzle holder of an electromagnetically actuated injection valve
KR19980702290A (ko) 연료 분사 밸브
JPH11505582A (ja) エレクトロメカニカル式の燃料噴射装置のための可動子ガイドおよびその組立方法
US5209408A (en) Electromagnetically operated fuel injection valve
CZ292559B6 (cs) Vstřikovací ventil paliva
EP0215527B1 (de) Elektromagnetisches Brennstoffeinspritzventil für Verbrennungsmotoren und dessen Herstellungsverfahren
GB2171498A (en) High speed electromagnetic valve
US4832314A (en) Electromagnetically actuatable fuel injection valve
US6286769B1 (en) Method of coaxially connecting precision parts comprising a plurality of members, method of assembling fuel injection nozzle, and fuel injection nozzle
US5518185A (en) Electromagnetic valve for fluid injection
US20030094513A1 (en) Fuel-injection valve and a method for regulating the same
US3166292A (en) Carburetor needle valves
KR0172132B1 (ko) 전자기 작동 연료 분사 밸브
US6915960B2 (en) Fuel-injection and a method for setting the same
EP0301620A2 (de) Elektromagnetisches Kraftstoffeinspritzventil für Brennkraftmaschinen
CA1114698A (en) Fuel injection pumping apparatus

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19870622

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: WEBER S.R.L.

17Q First examination report despatched

Effective date: 19880408

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 3673731

Country of ref document: DE

Date of ref document: 19901004

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19910823

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910909

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910927

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920916

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19920916

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930528

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930602

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST