EP0183210A1 - Electromagnetically actuated fuel injector - Google Patents

Electromagnetically actuated fuel injector Download PDF

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Publication number
EP0183210A1
EP0183210A1 EP85114888A EP85114888A EP0183210A1 EP 0183210 A1 EP0183210 A1 EP 0183210A1 EP 85114888 A EP85114888 A EP 85114888A EP 85114888 A EP85114888 A EP 85114888A EP 0183210 A1 EP0183210 A1 EP 0183210A1
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EP
European Patent Office
Prior art keywords
armature
groove
fuel injection
holding groove
valve needle
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Withdrawn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
EP85114888A
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German (de)
French (fr)
Inventor
Martin Horn
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Mannesmann VDO AG
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Mannesmann VDO AG
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Publication date
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Publication of EP0183210A1 publication Critical patent/EP0183210A1/en
Withdrawn legal-status Critical Current

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    • 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
    • F02M51/0678—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 all portions having fuel passages, e.g. flats, grooves, diameter reductions

Definitions

  • the invention relates to an electromagnetically actuated fuel injection valve for injection systems of internal combustion engines, with a valve housing, a soft iron core arranged within the valve housing and carrying a fixed magnetic winding, and an armature opposite it, forming an air gap, with an arm in a bore facing away from the injection side of the nozzle body guided valve needle is connected, wherein the armature surrounds the end of the valve needle in a ring and the material of the armature is projecting into a retaining groove formed radially circumferential on the cylindrical circumferential surface of the valve needle.
  • the object of the invention is therefore to provide a fuel injection valve according to the preamble, the armature of which is connected to the valve needle in a simple and secure manner against loosening.
  • the material projecting into the holding groove is preferably deformed in the axial direction into the holding groove by compressing the annular armature applied to the valve needle.
  • the trained in the undeformed state compared to its axial neighboring areas with a smaller wall thickness the The region of the armature surrounding the holding groove can be deformed into the holding groove.
  • the area of the material to be deformed during compression is defined by the small wall thickness, since the least resistance occurs there.
  • the region surrounding the holding groove preferably has a groove which extends radially around the cylindrical outer surface and forms the region of the smaller wall thickness.
  • the outer surface of the armature also has a uniform cylindrical shape.
  • the holding groove can have an approximately semicircular or also a radially outwardly increasing cross section. This also has the advantage that the axial relaxation also has a small radially inward force component, which leads to a central fixing of the armature on the valve needle.
  • the upsetting process described above not only leads to a deformation in the region of the holding groove, but also the play between the valve needle and the armature surrounding it is compensated, so that no special tolerances have to be observed during the production of these parts.
  • the fuel injection valve in FIG. 1 has a valve housing 1, in which a winding body 2 with the magnetic winding 3 is arranged.
  • a soft iron core 4 provided with a through passage 5 extends through the winding body 2 and, with its one end protruding from the valve housing, forms an inlet connection 6.
  • the other end face of the soft iron core 4 is opposed to form an air gap with an armature 7 which has a coaxially extending valve needle 8 on its side opposite the soft iron core 4.
  • valve needle 8 projects into a bore 9 of a nozzle body 10, which is connected coaxially to the valve housing 1.
  • valve needle 8 The free end of the valve needle 8 is designed as a valve closing member 11, which can be placed with its conical closing surface 19 on a corresponding surface of the valve seat 12 formed at the mouth of the bore 9 and thus the valve passage can be blocked.
  • a pin 13 formed at the free end of the valve needle 8 projects into the mouth of the bore 9, which forms the valve outlet.
  • the valve needle 8 is axially displaceable in the bore 9 by a limited amount.
  • the displaceability in the closing direction is limited by the bearing of the valve closing member 11 on the valve seat 12, while the displaceability in the opening direction is limited by the bearing of a stroke limiting stop 14 integrally formed on the valve needle 8 on a stop 15 fixedly connected to the valve housing 1.
  • the armature 7 and with it the valve needle 8 are acted upon in the closing direction by a prestressed compression spring 16 supported on the soft iron core 4.
  • the valve needle 8 has a smaller diameter than the di-e bore 9.
  • radially protruding guide projections 17 are therefore formed on the cylindrical outer surface of the valve needle 8, which are in contact with the bearing surfaces 18 against the wall of the bore 9.
  • the armature 7 is connected by a deformation process to the end of the valve needle 8 facing the soft iron core 4.
  • the anchor material in the region of the bottom of the groove 20 is deformed radially inward into the holding groove 21 until the two side walls 22 of the groove 20 abut one another.
  • the deformed anchor material springs back to a certain extent. This resilience takes place due to the axial compression essentially in the axial direction, so that the anchor material deformed into the retaining groove 21 is pre-stressed on the opposite curved side surfaces 23 of the retaining groove 21.

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  • 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)

Abstract

The valve for injection systems in internal combustion engines has a valve casing 1, a soft-iron core 4 arranged within the valve casing 1 and carrying a fixed magnet winding 3, and an armature 7 which is situated coaxially opposite the said core, forming an air gap, and is connected to the end, facing away from the injection side, of a valve needle 8 guided in a bore 9 of the nozzle body 10. The armature 7 annularly surrounds the end of the valve needle 8 and material of the armature 7 is deformed so as to project into a retention groove running round radially in the cylindrical circumferential surface of the valve needle 8. The armature material projecting into the retention groove 21 bears with axial prestress against the side faces 23 of the retention groove 21. <IMAGE>

Description

Die Erfindung betrifft ein elektromagnetisch betätigbares Kraftstoffeinspritzventil für Einspritzanlagen von Brennkraftmaschinen, mit einem Ventilgehäuse, einem innerhalb des Ventilgehäuses angeordneten, eine feststehende Magnetwicklung tragenden Weicheisenkern und einem diesem gleichachsig und unter Bildung eines Luftspaltes gegenüberstehenden Anker, der mit dem der Einspritzseite abgewandten Ende einer in einer Bohrung des Düsenkörpers geführten Ventilnadel verbunden ist, wobei der Anker das Ende der Ventilnadel ringförmig umschließt und Werkstoff des Ankers in eine an der zylindrischen Mantelfläche der Ventilnadel radial umlaufend ausgebildete Haltenut hineinragend verformt ist.The invention relates to an electromagnetically actuated fuel injection valve for injection systems of internal combustion engines, with a valve housing, a soft iron core arranged within the valve housing and carrying a fixed magnetic winding, and an armature opposite it, forming an air gap, with an arm in a bore facing away from the injection side of the nozzle body guided valve needle is connected, wherein the armature surrounds the end of the valve needle in a ring and the material of the armature is projecting into a retaining groove formed radially circumferential on the cylindrical circumferential surface of the valve needle.

Bei einem derartigen Kraftstoffeinspritzventil ist as bekannt die Haltenut im Bereich der einen Stirnwand des Ankers anzuordnen. Der mit Preßpassung auf die Ventilnadel aufgesetzte Anker ist an dieser Stirnfläche durch Verstemmen derart verformt, daß das verformte Ankermaterial in die Haltenut hineinragt.In such a fuel injection valve, it is known to arrange the holding groove in the region of one end wall of the armature. The armature placed on the valve needle with a press fit is deformed on this end face by caulking in such a way that the deformed armature material projects into the holding groove.

Diese Ausbildung erfordert zwei Arbeitsvorgänge zum sicheren Befestigen des Ankers, was sehr aufwendig ist.This training requires two operations to securely attach the anchor, which is very expensive.

Aufgabe der Erfindung ist es daher, ein Kraftstoffeinspritzventil nach dem Oberbegriff zu schaffen, dessen Anker auf einfache und gegen Lockern sichere Weise mit der Ventilnadel verbunden ist.The object of the invention is therefore to provide a fuel injection valve according to the preamble, the armature of which is connected to the valve needle in a simple and secure manner against loosening.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der in die Haltenut hineinragende Ankerwerkstoff mit axialer Vorspannung an den Seitenflächen der Haltenut in Anlage ist. Durch diese Ausbildung können die schnellen axialen Hin- und Herbewegungen, die der Anker mit der Ventilnadel im Betrieb des Kraftstoffeinspritzventils durchführen muß, nicht zu einem Lockern der Befestigung des Ankers auf der Ventilnadel führen, da der in die Haltenut hineinragende Ankerwerkstoff zwischen den Seitenflächen der Haltenut verspannt ist.This object is achieved in that the anchor material protruding into the holding groove is in axial contact with the side surfaces of the holding groove. With this design, the rapid axial back and forth movements which the armature must carry out with the valve needle during the operation of the fuel injection valve cannot lead to a loosening of the fastening of the armature on the valve needle, since the armature material projecting into the holding groove between the side surfaces of the holding groove is tense.

Vorzugsweise ist der in die Haltenut hineinragende Werkstoff durch Stauchen des auf die Ventilnadel aufgebrachten, ringförmigen Ankers in Axialrichtung in die Haltenut hinein verformt.The material projecting into the holding groove is preferably deformed in the axial direction into the holding groove by compressing the annular armature applied to the valve needle.

Das Entspannen des verformten Ankerwerkstoffs nach dem Stauchvorgang ist dadurch im wesentlichen axial gerichtet, so daß auf einfache Weise die axiale Vorspannung des an den Seitenflächen der Haltenut anliegenden Ankerwerkstoffs erzeugt wird.The relaxation of the deformed anchor material after the upsetting process is thereby essentially axially directed, so that the axial prestressing of the anchor material resting on the side surfaces of the retaining groove is generated in a simple manner.

Der im unverformten Zustand gegenüber seinem axialen Nachbarbereichen mit geringerer Wandstärke ausgebildete, die Haltenut umschließende Bereich des Ankers kann in die Haltenut hinein verformt sein. Dabei wird der Bereich des beim Stauchen zu verformenden Materials durch die geringe Wandstärke definiert, da dort der geringste Widerstand auftritt.The trained in the undeformed state compared to its axial neighboring areas with a smaller wall thickness, the The region of the armature surrounding the holding groove can be deformed into the holding groove. The area of the material to be deformed during compression is defined by the small wall thickness, since the least resistance occurs there.

Vorzugsweise weist der die Haltenut umschließende Bereich im unverformten Zustand eine an der zylindrischen Außenfläche radial umlaufende Nut auf, die den Bereich der geringeren Wandstärke bildet.In the undeformed state, the region surrounding the holding groove preferably has a groove which extends radially around the cylindrical outer surface and forms the region of the smaller wall thickness.

Sind im verformten Zustand die Seitenwände der Nut etwa aneinander in Anlage, so erhält auch die Außenfläche des Ankers eine gleichmäßige zylindrische Form.If the side walls of the groove abut against one another in the deformed state, the outer surface of the armature also has a uniform cylindrical shape.

Um den Fließvorgang des zu verformenden Materials während des Stauchvorganges günstig zu beeinflussen, kann die Haltenut einen etwa halbkreisförmigen oder auch einen radial nach außen sich vergrößernden Querschnitt besitzen. Dies hat weiterhin den Vorteil, daß die axiale Entspannung auch eine kleine radial nach innen gerichtete Kraftkomponente aufweist, die zu einer zentrischen Festlegung des Ankers auf der Ventilnadel führt.In order to favorably influence the flow process of the material to be deformed during the upsetting process, the holding groove can have an approximately semicircular or also a radially outwardly increasing cross section. This also has the advantage that the axial relaxation also has a small radially inward force component, which leads to a central fixing of the armature on the valve needle.

Der oben beschriebene Stauchvorgang führt nicht nur zu einer Deformation im Bereich der Haltenut, sondern es wird auch das Spiel zwischen Ventilnadel und des sie umschliessenden Ankers ausgeglichen, so daß bei der Herstellung dieser Teile keine besonderen Toleranzen eingehalten werden müssen.The upsetting process described above not only leads to a deformation in the region of the holding groove, but also the play between the valve needle and the armature surrounding it is compensated, so that no special tolerances have to be observed during the production of these parts.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and will be described in more detail below.

Es zeigen

  • Figur 1 - ein Kraftstoffeinspritzventil im Querschnitt
  • Figur 2 - den Anker des Kraftstoffeinspritzventils nach Figur 1 vor seiner Befestigung an der Ventilnadel
  • Figur 3 - den Anker des Kraftstoffeinspritz- . ventils nach Figur 1 nach seiner Befestigung an der Ventilnadel
Show it
  • Figure 1 - a fuel injector in cross section
  • Figure 2 - the armature of the fuel injector of Figure 1 in front of it Attachment to the valve needle
  • Figure 3 - the anchor of the fuel injection. valve according to Figure 1 after its attachment to the valve needle

Das Kraftstoffeinspritzventil in Figur 1 besitzt ein Ventilgehäuse 1, in dem ein Wickelkörper 2 mit der Magnetwicklung 3 angeordnet ist. Durch den Wickelkörper 2 erstreckt sich ein mit einer Durchgangsbahrung 5 versehener Weicheisenkern 4, der mit seinem einen aus dem Ventilgehäuse herausragenden Ende einen Einlaßstutzen 6 bildet.The fuel injection valve in FIG. 1 has a valve housing 1, in which a winding body 2 with the magnetic winding 3 is arranged. A soft iron core 4 provided with a through passage 5 extends through the winding body 2 and, with its one end protruding from the valve housing, forms an inlet connection 6.

Der anderen Stirnseite des Weicheisenkerns 4 steht unter Bildung eines Luftspaltes ein Anker 7 gegenüber, der an seiner dem Weicheisenkern 4 entgegengesetzten Seite eine koaxial sich erstreckende Ventilnadel 8 besitzt.The other end face of the soft iron core 4 is opposed to form an air gap with an armature 7 which has a coaxially extending valve needle 8 on its side opposite the soft iron core 4.

Die Ventilnadel 8 ragt in eine Bohrung 9 eines Düsenkörpers 10, der koaxial mit dem Ventilgehäuse 1 verbunden ist.The valve needle 8 projects into a bore 9 of a nozzle body 10, which is connected coaxially to the valve housing 1.

Das freie Ende der Ventilnadel 8 ist als Ventilschließglied 11 ausgebildet, das mit seiner kegeligen Schließfläche 19 auf einer entsprechenden Fläche des an der Mündung der Bohrung 9 ausgebildeten Ventilsitzes 12 aufsetzbar und somit der Ventildurchgang absperrbar ist.The free end of the valve needle 8 is designed as a valve closing member 11, which can be placed with its conical closing surface 19 on a corresponding surface of the valve seat 12 formed at the mouth of the bore 9 and thus the valve passage can be blocked.

In die Mündung der Bohrung 9, die den Ventilauslaß bildet, ragt ein am freien Ende der Ventilnadel 8 ausgebildeter Zapfen 13. Die Ventilnadel 8 ist um ein begrenztes Maß axial in der Bohrung 9 verschiebbar. Dabei ist die Verschiebbarkeit in Schließrichtung durch die Anlage des Ventilschließglieds 11 am Ventilsitz 12 begrenzt, während die Verschiebbarkeit in Öffnungsrichtung durch die Anlage eines an der Ventilnadel 8 angeformten Hubbegrenzungsanschlages 14 an einem mit dem Uentilgehäuse 1 fest verbundenen Anschlag 15 begrenzt ist.A pin 13 formed at the free end of the valve needle 8 projects into the mouth of the bore 9, which forms the valve outlet. The valve needle 8 is axially displaceable in the bore 9 by a limited amount. The displaceability in the closing direction is limited by the bearing of the valve closing member 11 on the valve seat 12, while the displaceability in the opening direction is limited by the bearing of a stroke limiting stop 14 integrally formed on the valve needle 8 on a stop 15 fixedly connected to the valve housing 1.

Durch eine am Weicheisenkern 4 abgestützte vorgespannte Druckfeder 16 ist der Anker 7 und mit ihm die Ventilnadel 8 in Schließrichtung beaufschlagt.The armature 7 and with it the valve needle 8 are acted upon in the closing direction by a prestressed compression spring 16 supported on the soft iron core 4.

Die Ventilnadel 8 weist einen geringeren Durchmesser auf als di-e Bohrung 9. Zur Führung sind daher an der zylindrischen Mantelfläche der Ventilnadel 8 radial hervorstehende Führungsansätze 17 ausgebildet, die mit ihren Anlageflächen 18 an der Wand der Bohrung 9 in Anlage sind.The valve needle 8 has a smaller diameter than the di-e bore 9. For guidance, radially protruding guide projections 17 are therefore formed on the cylindrical outer surface of the valve needle 8, which are in contact with the bearing surfaces 18 against the wall of the bore 9.

Der Anker 7 ist durch einen Verformungsvorgang mit dem dem Weicheisenkern 4 zugewandten Ende der Ventilnadel 8 verbunden.The armature 7 is connected by a deformation process to the end of the valve needle 8 facing the soft iron core 4.

Dazu wird der ringförmige Anker 7, der an seiner zylindrischen Außenfläche eine radial umlaufende Nut 20 etwa rechteckigen Querschnitt aufweist, so auf die Ventilnadel 8 aufgeschoben, daß sich die Nut 20 etwa im Bereich einer an der zylindrischen Mantelfläche der Ventilnadel 8 ausgebildeten Haltenut 21 halbkreisförmigen Querschnitts befindet.For this purpose, the annular armature 7, which has on its cylindrical outer surface a radially circumferential groove 20 of approximately rectangular cross section, is pushed onto the valve needle 8 in such a way that the groove 20 is approximately in the region of a retaining groove 21 formed in a semicircular cross section on the cylindrical outer surface of the valve needle 8 located.

Durch axiales-Stauchen des Ankers 7, wobei der Anker 7 von einer Außenführung umschlossen ist, wird das Ankermaterial im Bereich des Bodens der Nut 20 radial nach innen in die Haltenut 21 hinein verformt, bis die beiden Seitenwände 22 der Nut 20 aneinanderliegen.By axially compressing the armature 7, the armature 7 being enclosed by an outer guide, the anchor material in the region of the bottom of the groove 20 is deformed radially inward into the holding groove 21 until the two side walls 22 of the groove 20 abut one another.

Durch das Entlasten nach dem Stauchvorgang kommt es in einem bestimmten Umfang zu einem Rückfedern des verformten Ankermaterials. Diese Rückfederung erfolgt aufgrund der axialen Stauchung im wesentlichen in axialer Richtung, so daß das in die Haltenut 21 hinein verformte Ankermaterial mit Vorspannung an den sich gegenüberliegenden gewölbten Seitenflächen 23 der Haltenut 21 in Anlage ist.By relieving the pressure after the upsetting process, the deformed anchor material springs back to a certain extent. This resilience takes place due to the axial compression essentially in the axial direction, so that the anchor material deformed into the retaining groove 21 is pre-stressed on the opposite curved side surfaces 23 of the retaining groove 21.

Damit kann es während des Betriebes des Kraftstoffeinspritzventils nicht zu einem Lockern der Befestigung des Ankers 7 an der Ventilnadel 8 kommen.This prevents the fastening of the armature 7 from loosening on the valve needle 8 during operation of the fuel injection valve.

Claims (7)

1. Elektromagnetisch betätigbares Kraftstoffeinspritzventil für Einspritzanlagen von Brennkraftmaschinen, mit einem Ventilgehäuse, einem innerhalb des Ventilgehäuses angeordneten, eine feststehende Magnetwicklung tragenden Weicheisenkern und einem diesem gleichachsig und unter Bildung eines Luftspaltes gegenüberstehenden Anker, der mit dem der Einspritzseite abgewandten Ende einer in einer Bohrung des Düsenkörpers geführten Ventilnadel verbunden ist, wobei der Anker das Ende der Ventilnadel ringförmig umschließt und Werkstoff des Ankers in eine an der zylindrischen Mantelfläche der Uentilnadel radial umlaufend ausgebildete Nut hineinragend verformt ist, dadurch gekennzeichnet, daß der in die Haltenut (21) hineinragende Ankerwerkstoff mit axialer Vorspannung an den Seitenflächen (23) der Haltenut (21) in Anlage ist.1. Electromagnetically actuated fuel injection valve for injection systems of internal combustion engines, with a valve housing, a soft iron core arranged within the valve housing and carrying a fixed magnetic winding, and an armature that is coaxial with it and forms an air gap, the armature facing away from the injection side and ending in a bore in the nozzle body guided valve needle is connected, the armature annularly enclosing the end of the valve needle and the material of the armature projecting into a groove formed in a radial circumferential manner on the cylindrical outer surface of the valve needle, characterized in that the armature material projecting into the holding groove (21) is axially preloaded on the side surfaces (23) of the holding groove (21) is in contact. 2. Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der in die Haltenut (21) hineinragende Ankerwerkstoff durch Stauchen des auf die Uentilnadel (8) aufgebrachten, ringförmigen Ankers (9) in Axialrichtung in die Haltenut (21) hinein verformt ist.2. Fuel injection valve according to claim 1, characterized in that the anchor material projecting into the holding groove (21) is deformed in the axial direction into the holding groove (21) by upsetting the annular armature (9) applied to the valve needle (8). 3. Kraftstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, daß der im unverformten Zustand gegenüber seinen axialen Nachbarbereichen mit geringerer Wandstärke ausgebildete, die Haltenut (21) umschliessende Bereich des Ankers (7) in die Haltenut (21) hinein verformt ist.3. Fuel injection valve according to claim 2, characterized in that the non-deformed state with its smaller wall thickness compared to its axial neighboring regions, the retaining groove (21) enclosing region of the armature (7) in the retaining groove (21) is deformed into it. 4. Kraftstoffeinspritzventil nach Anspruch 3, dadurch gekennzeichnet, daß der die Haltenut (21) umschliessende Bereich im unverformten Zustand eine an der zylindrischen Außenfläche radial umlaufende Nut (20) aufweist.4. Fuel injection valve according to claim 3, characterized in that the region surrounding the holding groove (21) in the undeformed state has a groove (20) which extends radially on the cylindrical outer surface. 5. Kraftstoffeinspritzventil nach Anspruch 4, dadurch gekennzeichnet, daß im verformten Zustand die Seitenwände (22) der Nut (20) etwa aneinander in Anlage sind.5. Fuel injection valve according to claim 4, characterized in that in the deformed state the side walls (22) of the groove (20) are approximately in contact with each other. 6. Kraftstoffeinspritzventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Haltenut (21) einen etwa halbkreisförmigen Querschnitt besitzt.6. Fuel injection valve according to one of the preceding claims, characterized in that the holding groove (21) has an approximately semicircular cross section. 7. Kraftstoffeinspritzventil nach einem der Ansprüche 1 -5, dadurch gekennzeichnet, daß die Haltenut einen radial nach außen sich vergrößernden Querschnitt besitzt.7. Fuel injection valve according to one of claims 1 -5, characterized in that the holding groove has a radially outwardly increasing cross section.
EP85114888A 1984-11-26 1985-11-23 Electromagnetically actuated fuel injector Withdrawn EP0183210A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3443001 1984-11-26
DE19843443001 DE3443001A1 (en) 1984-11-26 1984-11-26 ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE

Publications (1)

Publication Number Publication Date
EP0183210A1 true EP0183210A1 (en) 1986-06-04

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EP85114888A Withdrawn EP0183210A1 (en) 1984-11-26 1985-11-23 Electromagnetically actuated fuel injector

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JP (1) JPS61197756A (en)
DE (1) DE3443001A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2515758B2 (en) * 1986-10-29 1996-07-10 株式会社日立製作所 Method of manufacturing electromagnetic fuel injection valve device
US5207387A (en) * 1991-07-29 1993-05-04 Siemens Automotive L.P. Means for attenuating audible noise from a solenoid-operated fuel injector
US7128281B2 (en) * 2004-06-03 2006-10-31 Siemens Vdo Automotive Corporation Modular fuel injector with a damper member and method of reducing noise
CH715259A1 (en) * 2018-08-16 2020-02-28 Wilco Ag Method and device for inspecting a state of a cannula placed on a syringe.

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DE2139948A1 (en) * 1971-08-10 1973-02-15 Bilstein August Fa PROCEDURE FOR FASTENING END FITTINGS TO CYLINDERS
DE2247850A1 (en) * 1971-08-10 1974-04-04 Bilstein August Fa PROCEDURE FOR FASTENING END FITTINGS TO CYLINDERS
GB1350997A (en) * 1971-07-07 1974-04-24 Fisher G E C Method of securing two members together
FR2246746A1 (en) * 1973-10-03 1975-05-02 Bosch Gmbh Robert
FR2441733A1 (en) * 1978-11-17 1980-06-13 Innota Innovation Tech Avancee ELECTROMAGNETIC INJECTORS AND METHODS OF MAKING THE SAME

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1350997A (en) * 1971-07-07 1974-04-24 Fisher G E C Method of securing two members together
DE2139948A1 (en) * 1971-08-10 1973-02-15 Bilstein August Fa PROCEDURE FOR FASTENING END FITTINGS TO CYLINDERS
DE2247850A1 (en) * 1971-08-10 1974-04-04 Bilstein August Fa PROCEDURE FOR FASTENING END FITTINGS TO CYLINDERS
FR2246746A1 (en) * 1973-10-03 1975-05-02 Bosch Gmbh Robert
FR2441733A1 (en) * 1978-11-17 1980-06-13 Innota Innovation Tech Avancee ELECTROMAGNETIC INJECTORS AND METHODS OF MAKING THE SAME

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JPS61197756A (en) 1986-09-02

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