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EP0602001A2 - Electromagnetically operated injection valve - Google Patents

Electromagnetically operated injection valve Download PDF

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Publication number
EP0602001A2
EP0602001A2 EP94101334A EP94101334A EP0602001A2 EP 0602001 A2 EP0602001 A2 EP 0602001A2 EP 94101334 A EP94101334 A EP 94101334A EP 94101334 A EP94101334 A EP 94101334A EP 0602001 A2 EP0602001 A2 EP 0602001A2
Authority
EP
European Patent Office
Prior art keywords
fuel inlet
valve
inlet connector
valve seat
injection valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94101334A
Other languages
German (de)
French (fr)
Other versions
EP0602001B1 (en
EP0602001A3 (en
Inventor
Peter Romann
Ferdinand Reiter
Rudolf Babitzka
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 EP0602001A2 publication Critical patent/EP0602001A2/en
Publication of EP0602001A3 publication Critical patent/EP0602001A3/en
Application granted granted Critical
Publication of EP0602001B1 publication Critical patent/EP0602001B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • 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
    • F02M51/0682—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 body being hollow and its interior communicating with the fuel flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/90—Electromagnetically actuated fuel injector having ball and seat type valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to an electromagnetically actuated injection valve according to the preamble of patent claim 1.
  • valve according to the invention with the characterizing features of claim 1 has the advantage of simple manufacture and assembly, which allows inexpensive series production.
  • the example shown electromagnetically actuated injection valve for fuel injection systems of internal combustion engines has a fuel inlet connector 1 surrounded by a magnet coil 4 and serving as the core, which has a constant outer diameter, for example by means of centerless loops, over its entire length for the best possible use of space.
  • the magnet coil 4 with a coil body 2 is provided with a plastic encapsulation 7, at the same time an electrical connector plug 21 being molded, so that there is an independent plastic injection molded part containing the magnet coil 4 and the connector plug 21.
  • the magnet coil 4 which has a stepped coil body 2 in the radial direction with a winding 13 which is stepped in the radial direction, in conjunction with the fuel inlet connector 1 having a constant outer diameter, enables a short and compact structure of the injection valve, as will be explained below.
  • a tubular metallic intermediate part 6 is connected by welding concentrically to a longitudinal valve axis 5 and thereby overlaps the core end 3 partially axially with an upper cylinder section 41.
  • the stepped bobbin 2 partially overlaps the fuel inlet connector 1 and, with a step 42 of larger diameter, the cylinder section 41 of the intermediate part 6.
  • the intermediate section 6 is provided at its end facing away from the fuel inlet connector 1 with a lower cylinder section 43 which engages over and with a tubular connecting part 14 is tightly connected by welding.
  • a cylindrical valve seat body 8 is tightly mounted by welding. The lining up of fuel inlet connector 1, intermediate part 6, connecting part 14 and valve seat body 8 thus represents a rigid metal unit.
  • the valve seat body 8 has a constant outer diameter, for example formed by centerless grinding, so that the valve seat body 8 can be inserted completely into the connecting part 14 can and through the longer coverage better tightness between valve seat body 8 and the inner bore 30 of the connecting part 14 is achieved.
  • a tubular armature 12 is connected by welding, which is guided by a guide collar 15 of the intermediate part 6.
  • a valve closing body 10 which interacts with the valve seat 9 of the valve seat body 8, is connected to it, for example by soldering or welding, which is designed, for example, as a ball.
  • At least one spray opening 33 Downstream of the valve seat 9, at least one spray opening 33, for example formed by eroding, is formed in the valve seat body 8.
  • the weld seam 35 between the valve seat body 8 and the connecting part 14 is relatively far away from the spray opening (s) 33 and from the valve seat 9, so that an influence on the quantity and leakage due to warping of the valve seat body 8 due to the high temperatures occurring during welding is effectively prevented.
  • an axial gap 29 is formed in which, by clamping, a gap which forms a residual air gap between the inlet-side end face 26 of the armature 12 and the end face 23 of the core end 3, limits the stroke of the valve closing body 10 during the opening process of the valve non-magnetic stop plate 27 is arranged.
  • the clamped stop disc 27 protects the end face 23 of the core end 3 because of its greater bending stiffness better from wear than a loose disc, in which there is a risk of tilting and uneven striking.
  • the magnet coil 4 is surrounded by at least one guide element 16, which is designed as a bracket in the exemplary embodiment and serves as a ferromagnetic element, which extends in the axial direction over the entire length of the magnet coil 4 and at least partially surrounds the magnet coil 4 in the circumferential direction and with one end thereof Fuel inlet connector 1 and with its other end on the connecting part 14 and z. B. is connected by welding.
  • a part of the valve is enclosed by a plastic sheath 18, which extends axially from the fuel inlet connector 1, extends axially via the magnet coil 4 with connector 21 and the at least one guide element 16, and extends radially extending side faces of an annular groove provided on the circumference of the inlet-side end 44 of the fuel inlet connector 1 25 forms.
  • the groove base of the annular groove 25, which has a sealing ring 45, for example, is formed by the circumference of the fuel inlet connector 1.
  • the plastic casing 18 engages in a holding groove 46 at the inlet end 44 of the fuel inlet connector 1.
  • the described plastic encapsulation 7 of the solenoid 4 in connection with the injection molded connector 21 allows a high degree of flexibility in the assembly of differently designed valves, since only one extrusion tool is required for connecting connectors 21 and solenoids 4 of different design to produce the plastic casing 18.
  • the magnet coil 4 which has the coil body 2 stepped in the radial direction with the winding 13 stepped in the radial direction, enables a compact and short design of the valve by projecting beyond the upper cylinder section 41 of the intermediate part 6 and thus causing the individual parts to be interleaved.

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)
  • Magnetically Actuated Valves (AREA)
  • Electromagnets (AREA)

Abstract

Bei vorgeschlagenen elektromagnetisch betätigbaren Einspritzventilen mit einem von einer Magnetspule umgebenen, als Kern dienenden Brennstoffeinlaßstutzen ist zumindest ein Teil des Ventils von einer Kunststoffummantelung umschlossen. Eine Haltenut im Brennstoffeinlaßstutzen dient zum Einschnappen eines Halteringes für einen Dichtring.In the case of proposed electromagnetically actuated injection valves with a fuel inlet connection surrounded by a magnetic coil and serving as a core, at least part of the valve is enclosed by a plastic jacket. A retaining groove in the fuel inlet connection serves to snap in a retaining ring for a sealing ring.

Bei dem neuen Einspritzventil wird mit der Kunststoffummantelung (18) zugleich ein Abschnitt am Brennstoffeinlaßstutzen (1) mitangespritzt, der eine Ringnut (25) für den Dichtring (45) radial begrenzt.In the case of the new injection valve, a section of the fuel inlet connector (1), which radially delimits an annular groove (25) for the sealing ring (45), is simultaneously molded on with the plastic jacket (18).

Das Einspritzventil findet bei Brennstoffeinspritzanlagen Verwendung.The injection valve is used in fuel injection systems.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem elektromagnetisch betätigbaren Einspritzventil nach der Gattung des Patentanspruchs 1.The invention relates to an electromagnetically actuated injection valve according to the preamble of patent claim 1.

In der DE-A-38 25 135 ist bereits ein elektromagnetisch betätigbares Ventil vorgeschlagen worden, bei dem zumindest ein Teil des Ventils von einer Kunststoffummantelung umschlossen wird. Am zulaufseitigen Ende des Brennstoffeinlaßstutzens ist eine Haltenut für einen Haltering vorgesehen, der bei der Montage eingeschnappt werden muß und einen Dichtring am Brennstoffeinlaßstutzen hält. Dies verhindert eine kostengünstige Montage.In DE-A-38 25 135 an electromagnetically actuated valve has already been proposed, in which at least part of the valve is enclosed by a plastic jacket. At the inlet end of the fuel inlet connector, a retaining groove is provided for a retaining ring, which must be snapped in during assembly and holds a sealing ring on the fuel inlet connector. This prevents inexpensive assembly.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Ventil mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat demgegenüber den Vorteil einer einfachen Herstellung und Montage, was eine kostengünstige Serienfertigung erlaubt.The valve according to the invention with the characterizing features of claim 1 has the advantage of simple manufacture and assembly, which allows inexpensive series production.

Durch die in dem abhängigen Patentanspruch aufgeführte Maßnahme ist eine vorteilhafte Weiterbildung und Verbesserung des im Patentanspruch 1 angegebenen Ventils möglich.The measure specified in the dependent patent claim enables advantageous further development and improvement of the valve specified in patent claim 1.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Das beispielsweise dargestellte elektromagnetisch betätigbare Einspritzventil für Brennstoffeinspritzanlagen von Brennkraftmaschinen hat einen von einer Magnetspule 4 umgebenen, als Kern dienenden Brennstoffeinlaßstutzen 1, der zur bestmöglichen Raumausnutzung über seine gesamte Länge einen konstanten, beispielsweise mittels Centerless-Schleifen ausgebildeten Außendurchmesser aufweist. Die Magnetspule 4 mit einem Spulenkörper 2 ist mit einer Kunststoffumspritzung 7 versehen, wobei zugleich ein elektrischer Anschlußstecker 21 mitangespritzt wird, so daß sich ein die Magnetspule 4 und den Anschlußstecker 21 beinhaltendes eigenständiges Kunststoffspritzteil ergibt. Die in radialer Richtung einen gestuften Spulenkörper 2 mit einer in radialer Richtung gestuften Bewicklung 13 aufweisende Magnetspule 4 ermöglicht in Verbindung mit dem einen konstanten Außendurchmesser aufweisenden Brennstoffeinlaßstutzen 1 einen kurzen und kompakten Aufbau des Einspritzventils, wie anschließend erläutert wird.The example shown electromagnetically actuated injection valve for fuel injection systems of internal combustion engines has a fuel inlet connector 1 surrounded by a magnet coil 4 and serving as the core, which has a constant outer diameter, for example by means of centerless loops, over its entire length for the best possible use of space. The magnet coil 4 with a coil body 2 is provided with a plastic encapsulation 7, at the same time an electrical connector plug 21 being molded, so that there is an independent plastic injection molded part containing the magnet coil 4 and the connector plug 21. The magnet coil 4, which has a stepped coil body 2 in the radial direction with a winding 13 which is stepped in the radial direction, in conjunction with the fuel inlet connector 1 having a constant outer diameter, enables a short and compact structure of the injection valve, as will be explained below.

Mit einem unteren Kernende 3 des Brennstoffeinlaßstutzens 1 ist konzentrisch zu einer Ventillängsachse 5 dicht ein rohrförmiges metallenes Zwischenteil 6 durch Schweißen verbunden und übergreift dabei mit einem oberen Zylinderabschnitt 41 das Kernende 3 teilweise axial. Der gestufte Spulenkörper 2 übergreift teilweise den Brennstoffeinlaßstutzen 1 und mit einer Stufe 42 größeren Durchmessers den Zylinderabschnitt 41 des Zwischenteils 6. Das Zwischenteil 6 ist an seinem dem Brennstoffeinlaßstutzen 1 abgewandten Ende mit einem unteren Zylinderabschnitt 43 versehen, der ein rohrförmiges Verbindungsteil 14 übergreift und mit diesem durch Schweißen dicht verbunden ist. In das stromabwärts liegende Ende des Verbindungsteils 14 ist ein zylinderförmiger Ventilsitzkörper 8 durch Schweißen dicht montiert. Die Aneinanderreihung von Brennstoffeinlaßstutzen 1, Zwischenteil 6, Verbindungsteil 14 und Ventilsitzkörper 8 stellt somit eine starre metallene Einheit dar. Der Ventilsitzkörper 8 weist einen konstanten, beispielsweise mittels Centerless-Schleifen ausgebildeten Außendurchmesser auf, so daß der Ventilsitzkörper 8 vollständig in das Verbindungsteil 14 eingesetzt werden kann und durch die längere Überdeckung eine bessere Dichtheit zwischen Ventilsitzkörper 8 und der Innenbohrung 30 des Verbindungsteiles 14 erzielt wird.With a lower core end 3 of the fuel inlet connection 1, a tubular metallic intermediate part 6 is connected by welding concentrically to a longitudinal valve axis 5 and thereby overlaps the core end 3 partially axially with an upper cylinder section 41. The stepped bobbin 2 partially overlaps the fuel inlet connector 1 and, with a step 42 of larger diameter, the cylinder section 41 of the intermediate part 6. The intermediate section 6 is provided at its end facing away from the fuel inlet connector 1 with a lower cylinder section 43 which engages over and with a tubular connecting part 14 is tightly connected by welding. In the downstream end of the connecting part 14, a cylindrical valve seat body 8 is tightly mounted by welding. The lining up of fuel inlet connector 1, intermediate part 6, connecting part 14 and valve seat body 8 thus represents a rigid metal unit. The valve seat body 8 has a constant outer diameter, for example formed by centerless grinding, so that the valve seat body 8 can be inserted completely into the connecting part 14 can and through the longer coverage better tightness between valve seat body 8 and the inner bore 30 of the connecting part 14 is achieved.

Eine in eine Strömungsbohrung 19 des Brennstoffeinlaßstutzens 1 eingeschobene, in Längsrichtung einen Schlitz 31 aufweisende Einstellhülse 20, die beispielsweise aus gerolltem Federstahlblech ausgeformt ist, dient zur Einstellung der Federvorspannung einer an der Einstellhülse 20 anliegenden Rückstellfeder 32, die sich stromabwärts an einem Verbindungsrohr 11 abstützt. Mit dem der Rückstellfeder 32 zugewandten Ende des Verbindungsrohres 11 ist durch Schweißen ein rohrförmiger Anker 12 verbunden, der durch einen Führungsbund 15 des Zwischenteils 6 geführt wird. Am anderen Ende des Verbindungsrohres 11 ist mit diesem ein mit dem Ventilsitz 9 des Ventilsitzkörpers 8 zusammenwirkender Ventilschließkörper 10 beispielsweise durch Löten oder Schweißen verbunden, der beispielsweise als Kugel ausgebildet ist. Stromabwärts des Ventilsitzes 9 ist im Ventilsitzkörper 8 wenigstens eine, beispielsweise durch Erodieren geformte Abspritzöffnung 33 ausgebildet. Die Schweißnaht 35 zwischen Ventilsitzkörper 8 und Verbindungsteil 14 ist von der/den Abspritzöffnung/en 33 und vom Ventilsitz 9 relativ weit entfernt, so daß eine Mengenbeeinflussung und Undichtheit durch einen aufgrund der beim Schweißen auftretenden hohen Temperaturen erfolgenden Verzug des Ventilsitzkörpers 8 wirkungsvoll verhindert wird.An adjusting sleeve 20 inserted into a flow bore 19 of the fuel inlet connector 1 and having a slot 31 in the longitudinal direction, which is formed, for example, from rolled spring steel sheet, serves to adjust the spring preload of a return spring 32 abutting the adjusting sleeve 20, which is supported downstream on a connecting pipe 11. With the return spring 32 facing the end of the connecting tube 11, a tubular armature 12 is connected by welding, which is guided by a guide collar 15 of the intermediate part 6. At the other end of the connecting tube 11, a valve closing body 10, which interacts with the valve seat 9 of the valve seat body 8, is connected to it, for example by soldering or welding, which is designed, for example, as a ball. Downstream of the valve seat 9, at least one spray opening 33, for example formed by eroding, is formed in the valve seat body 8. The weld seam 35 between the valve seat body 8 and the connecting part 14 is relatively far away from the spray opening (s) 33 and from the valve seat 9, so that an influence on the quantity and leakage due to warping of the valve seat body 8 due to the high temperatures occurring during welding is effectively prevented.

Zwischen der Stirnfläche 23 des dem Anker 12 zugewandten Kernendes 3 und einer zum oberen Zylinderabschnitt 41 führenden Schulter 24 des Zwischenteiles 6 ist ein axialer Spalt 29 gebildet, in dem durch Einklemmen eine, einen Restluftspalt zwischen der zulaufseitigen Stirnseite 26 des Ankers 12 und der Stirnfläche 23 des Kernendes 3 bildende, den Hub des Ventilschließkörpers 10 beim Öffnungsvorgang des Ventils begrenzende nichtmagnetische Anschlagscheibe 27 angeordnet ist. Die geklemmte Anschlagscheibe 27 schützt die Stirnfläche 23 des Kernendes 3 wegen ihrer größeren Biegesteifigkeit besser vor Verschleiß als eine lose Scheibe, bei der die Gefahr des Verkantens und des ungleichmäßigen Anschlagens besteht.Between the end face 23 of the core end 3 facing the armature 12 and one towards the top Cylinder section 41 leading shoulder 24 of the intermediate part 6, an axial gap 29 is formed in which, by clamping, a gap which forms a residual air gap between the inlet-side end face 26 of the armature 12 and the end face 23 of the core end 3, limits the stroke of the valve closing body 10 during the opening process of the valve non-magnetic stop plate 27 is arranged. The clamped stop disc 27 protects the end face 23 of the core end 3 because of its greater bending stiffness better from wear than a loose disc, in which there is a risk of tilting and uneven striking.

Die Magnetspule 4 ist von wenigstens einem, im Ausführungsbeispiel als Bügel ausgebildeten, als ferromagnetisches Element dienenden Leitelement 16 umgeben, das sich in axialer Richtung über die gesamte Länge der Magnetspule 4 erstreckt und die Magnetspule 4 in Umfangsrichtung wenigstens teilweise umgibt und mit seinem einen Ende am Brennstoffeinlaßstutzen 1 und mit seinem anderen Ende am Verbindungsteil 14 anliegt und mit diesen z. B. durch Verschweißen verbunden ist.The magnet coil 4 is surrounded by at least one guide element 16, which is designed as a bracket in the exemplary embodiment and serves as a ferromagnetic element, which extends in the axial direction over the entire length of the magnet coil 4 and at least partially surrounds the magnet coil 4 in the circumferential direction and with one end thereof Fuel inlet connector 1 and with its other end on the connecting part 14 and z. B. is connected by welding.

Ein Teil des Ventils ist von einer Kunststoffummantelung 18 umschlossen, die sich vom Brennstoffeinlaßstutzen 1 ausgehend axial über die Magnetspule 4 mit Anschlußstecker 21 und das wenigstens eine Leitelement 16 erstreckt und dabei sich radial erstreckende Seitenflächen einer am Umfang des zulaufseitigen Endes 44 des Brennstoffeinlaßstutzens 1 vorgesehenen Ringnut 25 bildet. Der Nutgrund der beispielsweise einen Dichtring 45 aufweisenden Ringnut 25 wird durch den Umfang des Brennstoffeinlaßstutzens 1 ausgebildet. Die Kunststoffummantelung 18 greift am zulaufseitigen Ende 44 des Brennstoffeinlaßstutzens 1 in eine Haltenut 46.A part of the valve is enclosed by a plastic sheath 18, which extends axially from the fuel inlet connector 1, extends axially via the magnet coil 4 with connector 21 and the at least one guide element 16, and extends radially extending side faces of an annular groove provided on the circumference of the inlet-side end 44 of the fuel inlet connector 1 25 forms. The groove base of the annular groove 25, which has a sealing ring 45, for example, is formed by the circumference of the fuel inlet connector 1. The plastic casing 18 engages in a holding groove 46 at the inlet end 44 of the fuel inlet connector 1.

Die beschriebene Kunststoffumspritzung 7 der Magnetspule 4 in Verbindung mit dem zugleich angespritzten Anschlußstecker 21 erlaubt eine hohe Flexibilität bei der Montage verschieden ausgebildeter Ventile, da für verschieden ausgeführte Anschlußstecker 21 und Magnetspulen 4 zur Erzeugung der Kunststoffummantelung 18 nur ein Umspritzungswerkzeug erforderlich ist. Die den in radialer Richtung gestuften Spulenkörper 2 mit der in radialer Richtung gestuften Bewicklung 13 aufweisende Magnetspule 4 ermöglicht eine kompakte und kurze Bauform des Ventils, indem sie den oberen Zylinderabschnitt 41 des Zwischenteils 6 überragt und damit eine Verschachtelung der einzelnen Teile bewirkt.The described plastic encapsulation 7 of the solenoid 4 in connection with the injection molded connector 21 allows a high degree of flexibility in the assembly of differently designed valves, since only one extrusion tool is required for connecting connectors 21 and solenoids 4 of different design to produce the plastic casing 18. The magnet coil 4, which has the coil body 2 stepped in the radial direction with the winding 13 stepped in the radial direction, enables a compact and short design of the valve by projecting beyond the upper cylinder section 41 of the intermediate part 6 and thus causing the individual parts to be interleaved.

Claims (2)

1. Elektromagnetisch betätigbares Einspritzventil für Brennstoffeinspritzanlagen von Brennkraftmaschinen, mit einem von einer Magnetspule (4) umgebenen, als Kern dienenden Brennstoffeinlaßstutzen (1), mit einem Anker (12), durch den ein mit einem festen Ventilsitz (9) zusammenwirkender Ventilschließkörper (10) betätigbar ist, mit einem den festen Ventilsitz (9) aufweisenden, metallenen Ventilsitzkörper (8) und mit einer zumindest einen Teil des Ventils umschließenden Kunststoffummantelung (18), dadurch gekennzeichnet, daß am Umfang des zulaufseitigen Endes (44) des Brennstoffeinlaßstutzens (1) eine Ringnut (25) zur Aufnahme eines Dichtringes (45) vorgesehen ist, deren radial sich erstreckende Seitenflächen durch die Kunststoffummantelung (18) und deren Nutgrund durch den Umfang des Brennstoffeinlaßstutzens (1) gebildet wird.1. Electromagnetically actuated injection valve for fuel injection systems of internal combustion engines, with a fuel inlet connector (1) surrounded by a magnetic coil (4) and serving as the core, with an armature (12) through which a valve closing body (10) interacting with a fixed valve seat (9) Can be actuated, with a metal valve seat body (8) having the fixed valve seat (9) and with a plastic casing (18) enclosing at least part of the valve, characterized in that on the circumference of the inlet-side end (44) of the fuel inlet connector (1) one An annular groove (25) is provided for receiving a sealing ring (45), the radially extending side surfaces of which are formed by the plastic casing (18) and the groove base of which is formed by the circumference of the fuel inlet connector (1). 2. Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß am zulaufseitigen Ende (44) des Brennstoffeinlaßstutzens (1) eine Haltenut (46) vorgesehen ist, in die ein ringförmiger Abschnitt der Kunststoffummantelung (18) greift, der eine der radial sich erstrekkenden Seitenflächen der Ringnut (25) bildet.2. Injection valve according to claim 1, characterized in that at the inlet end (44) of the fuel inlet connector (1) a holding groove (46) is provided, in which an annular portion of the plastic casing (18) engages, which one of the radially extending side surfaces of the Forms annular groove (25).
EP94101334A 1990-02-03 1991-01-21 Electromagnetically operated injection valve Expired - Lifetime EP0602001B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4003228A DE4003228A1 (en) 1990-02-03 1990-02-03 ELECTROMAGNETICALLY ACTUABLE VALVE
DE4003228 1990-02-03
EP91902298A EP0513037B1 (en) 1990-02-03 1991-01-21 Electromagnetically operated valve

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP91902298.8 Division 1991-01-21

Publications (3)

Publication Number Publication Date
EP0602001A2 true EP0602001A2 (en) 1994-06-15
EP0602001A3 EP0602001A3 (en) 1994-11-17
EP0602001B1 EP0602001B1 (en) 1996-04-10

Family

ID=6399369

Family Applications (2)

Application Number Title Priority Date Filing Date
EP91902298A Expired - Lifetime EP0513037B1 (en) 1990-02-03 1991-01-21 Electromagnetically operated valve
EP94101334A Expired - Lifetime EP0602001B1 (en) 1990-02-03 1991-01-21 Electromagnetically operated injection valve

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP91902298A Expired - Lifetime EP0513037B1 (en) 1990-02-03 1991-01-21 Electromagnetically operated valve

Country Status (9)

Country Link
US (3) US5275341A (en)
EP (2) EP0513037B1 (en)
JP (2) JP2986542B2 (en)
KR (1) KR0185731B1 (en)
BR (1) BR9105985A (en)
DE (3) DE4003228A1 (en)
ES (2) ES2062761T3 (en)
RU (1) RU2092735C1 (en)
WO (1) WO1991011611A2 (en)

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GB2323634A (en) * 1997-03-27 1998-09-30 Bosch Gmbh Robert Fuel injection valve with sheet metal parts
GB2323634B (en) * 1997-03-27 1999-05-26 Bosch Gmbh Robert Fuel injection valve
US6012701A (en) * 1997-03-27 2000-01-11 Robert Bosch Gmbh Fuel injection valve
US6601786B2 (en) 2000-05-12 2003-08-05 Denso Corporation Fuel injection valve
WO2005061868A1 (en) * 2003-12-23 2005-07-07 Ln Systems Aps A combustion engine

Also Published As

Publication number Publication date
JPH10122085A (en) 1998-05-12
RU2092735C1 (en) 1997-10-10
EP0602001B1 (en) 1996-04-10
US5580001A (en) 1996-12-03
DE4003228A1 (en) 1991-08-22
US5275341A (en) 1994-01-04
DE59107672D1 (en) 1996-05-15
JP3027353B2 (en) 2000-04-04
WO1991011611A3 (en) 1991-09-19
EP0602001A3 (en) 1994-11-17
JP2986542B2 (en) 1999-12-06
KR0185731B1 (en) 1999-03-20
EP0513037A1 (en) 1992-11-19
WO1991011611A2 (en) 1991-08-08
US6341412B1 (en) 2002-01-29
ES2086971T3 (en) 1996-07-01
ES2062761T3 (en) 1994-12-16
JPH05503976A (en) 1993-06-24
KR920703997A (en) 1992-12-18
EP0513037B1 (en) 1994-09-28
DE4003228C2 (en) 1992-11-26
DE59103119D1 (en) 1994-11-03
BR9105985A (en) 1992-11-10

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