EP0516632B1 - Electromagnetically operated valve - Google Patents

Electromagnetically operated valve Download PDF

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Publication number
EP0516632B1
EP0516632B1 EP91902270A EP91902270A EP0516632B1 EP 0516632 B1 EP0516632 B1 EP 0516632B1 EP 91902270 A EP91902270 A EP 91902270A EP 91902270 A EP91902270 A EP 91902270A EP 0516632 B1 EP0516632 B1 EP 0516632B1
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EP
European Patent Office
Prior art keywords
valve
housing shell
core
connecting part
housing
Prior art date
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Expired - Lifetime
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EP91902270A
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German (de)
French (fr)
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EP0516632A1 (en
Inventor
Ferdinand Reiter
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Robert Bosch GmbH
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Robert Bosch GmbH
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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
    • F02M51/0614—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures

Definitions

  • the invention is based on an electromagnetically actuated valve according to the preamble of patent claim 1.
  • Such an electromagnetically actuated valve is already known (DE-A-38 25 135), but in which the solenoid coil only partially covers at least one of its circumference Guide the magnetic field lines serving bow-shaped guide element is surrounded.
  • plastic material of a plastic extrusion coating is located in a gap formed between the magnet coil and the guide element.
  • the unfavorably designed magnetic field causes a high magnetic leakage flux and thus a high energy expenditure to open the valve.
  • the central fuel supply in connection with the angled electrical connector prevents the contacting of several valves by means of a common connector strip and the series connection of several valves arranged one behind the other.
  • the valve according to the invention with the characterizing features of claim 1 has the advantage of a compact valve with a compact magnetic circuit.
  • a short way of the magnetic Field-forming closed field lines and the enveloping housing jacket reduce the magnetic leakage flux and thus increase the ratio between useful flow and leakage flow which is decisive for the energy to be used, so that less energy is required to open the valve.
  • the housing jacket enables a compact and simple design of the valve and thus also an inexpensive assembly during manufacture. It is particularly advantageous if the metal housing jacket is tightly connected to the connecting part by welding, because at the same time the necessary seal is formed between the housing jacket and the connecting part.
  • the housing jacket has an outwardly facing housing shoulder which, together with an end face of the plastic casing facing in the direction of the housing shoulder, forms the side faces of an annular groove, the groove base of which is formed by the circumference of the housing jacket.
  • the housing shoulder prevents a sealing ring mounted on the circumference of the housing jacket from remaining in this receptacle when the valve is removed from a valve receptacle.
  • an annular groove is provided on the circumference of the housing shell, the radially extending side surfaces of which face an end face of the plastic sheathing pointing in the direction of the armature and an end face of a pull ring drawn onto the housing shell and the bottom of the groove is formed by the circumference of the housing shell.
  • At least one radial transverse opening serving to feed the fuel is formed between an upper sealing ring on the housing jacket and a lower sealing ring on the connecting part, said radial opening being in communication with a valve space extending to the valve seat.
  • the side fuel supply and the axially arranged electrical connector allow a series flushing of several valves arranged in series with the fuel, the full integration of several valves in receptacles of the intake manifold of the internal combustion engine and the common contacting by means of a common connector strip.
  • the electromagnetically actuated valve shown in the drawing for example, in the form of an injection valve for fuel injection systems of internal combustion engines has a hollow core 1, which has a coil former 7 which is stepped in the radial direction and is provided with a winding which is stepped in the radial direction Magnetic coil 2 partially surrounds.
  • a hollow intermediate part 6 is tightly connected thereto by welding, concentrically with a valve longitudinal axis 5.
  • the intermediate part 6 is tightly welded to a tubular, cylindrical connecting part 8.
  • the lining up of core 1, intermediate part 6 and connecting part 8 thus represents a rigid metal unit.
  • a ball element 25 In the direction of the longitudinal axis 5 of the valve, a ball element 25, preferably having a hardened surface, is pressed into a core bore 17 of the core 1, the press-in depth of which determines the spring force of a return spring 26, which rests directly on the ball element 25.
  • the return spring 26 With its end facing away from the ball element 25, the return spring 26 is supported on an end face of a connecting tube 11, which is connected at its end facing the core 1 to an armature 12, which at the same time serves as a radial guide for the return spring 26, by welding.
  • a valve-closing body 10 designed as a ball is fastened by welding and cooperates with a fixed valve seat 15.
  • a valve seat body 14 having the fixed valve seat 15 is tightly connected to the connecting part 8 by welding. At least one spray orifice 18 is formed in the valve seat body 14 downstream of the conical valve seat 15.
  • the housing shell 3 is at its upper end 35 with the core 1 by welding at least in places and at its lower end End 36 tightly connected to the connecting part 8 by welding.
  • the housing jacket 3 is designed such that its upper end 35 fits tightly against the core 1 and with its lower end 36 against the connecting part 8.
  • the magnetic coil 2 extends radially outward around a bottom 37 of the housing shell 3 to the larger-diameter cylindrical shell part 38 with the lower end 36.
  • the connecting part 8 has in the illustrated embodiment between an upper sealing ring 39 on the casing part 38 of the housing shell 3 and a lower sealing ring 40 on the connecting part 8 at least one radial cross opening 20 serving the fuel inlet, which with the valve seat 15 reaching valve chamber 16 inside the Connection part 8 is connected.
  • the transverse opening 20 is formed in the connecting part 8, but it can also run at the level of the jacket part 38.
  • a carrier ring 32 is held, which has a fuel filter 33, through which fuel can flow to the transverse opening 20.
  • the coil body 7 of the magnet coil 2 is produced by a plastic extrusion coating, by means of which the electrical connecting plugs 30 required for contacting the magnet coil 2 are also molded on, so that an independent plastic injection molding is formed.
  • This plastic injection molded part is inserted into the housing shell 3 in such a way that it bears against the bottom 37 and the connecting plugs 30 protrude outward through through openings 45 in the bottom 37 approximately parallel to the longitudinal valve axis 5 in the direction of the upper end 35.
  • the core bore 17 is closed at its end facing away from the valve closing body 10 by a plastic plug 31, so that when a plastic jacket 22 is injected, which surrounds the end of the valve facing away from the valve seat body 14 at the bottom 37 and part of the connector plug 30, no liquid plastic into the Core hole 17 can reach.
  • the plastic sheath 22 extends radially beyond the bottom 37.
  • the core bore 17 is sealed off from the fuel located in the valve interior by means of the spherical element 25 pressed into the core bore 17.
  • An annular groove 47 is provided on the circumference of the casing part 38 of the housing casing 3, the radially extending side surfaces of which are directed through the end face 49 of the plastic casing 22 pointing in the direction of the armature and the end face of a pull ring 23 which is drawn onto the casing part 38 and which, for example, has an L-shaped cross-sectional shape has, and the groove bottom is formed by the circumference of the jacket part 38.
  • the pull ring 23 ensures when removing the valve from a receptacle (not shown) in the intake manifold of an internal combustion engine that an upper sealing ring 39 mounted in the annular groove largely maintains its axial position on the circumference of the casing part 38 and does not remain in the intake manifold receptacle.
  • the casing part 38 has a dashed, outwardly facing housing shoulder 48 which, together with the end face of the plastic casing 22 pointing in the direction of the casing shoulder 48, forms the side faces of the annular groove 47, the groove base of which through the circumference of the casing part 38 is formed.
  • This solution also results in that an upper sealing ring 39 mounted on the circumference of the jacket part 38 does not remain in this receptacle when the valve is removed from a receptacle of the intake manifold.
  • the lower sealing ring 40 is held on the connecting part 8 in a lower annular groove 50, which is delimited by two shoulders 51, 52 of the connecting part 8 which run radially outward from one another.
  • the armature 12 is guided in a slide opening 54 of the intermediate part 6, while the valve closing body 10 is slidably mounted in a guide opening 55 of the valve seat body 14.
  • valves according to the invention allow a series flushing of several valves arranged one behind the other and their common electrical contacting by means of a common plug connector.

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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)
  • Power Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

In prior art electromagnetically operated valves with a core surrounded by a coil magnet and with an armature by means of which a valve-closure element operating in conjunction with a rigidly mounted valve seat is actuated, the periphery of the coil magnet is surrounded by at least one U-shaped conduction element which orients the magnetic-field lines. This gives rise to undesirable stray flux, however. The new valve is at least partly surrounded by a metal housing (3) which completes the magnetic circuit and is hermetically joined at the upper end (35) to the core (1) and at the lower end (36) to a connector piece (8) and projects at least in the longitudinal direction beyond the coil magnet (2). This valve design is particularly suitable for use as an injection valve in a fuel-injection system.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem elektromagnetisch betätigbaren Ventil nach der Gattung des Patentanspruchs 1. Es ist bereits ein solches elektromagnetisch betätigbares Ventil bekannt (DE-A- 38 25 135), bei dem aber die Magnetspule über ihren Umfang nur zum Teil von wenigstens einem zur Führung der Magnetfeldlinien dienenden bügelförmigen Leitelement umgeben ist. Zudem befindet sich in einem zwischen der Magnetspule und dem Leitelement gebildeten Spalt Kunststoffmaterial einer Kunststoffumspritzung. Das ungünstig ausgebildete Magnetfeld bedingt einen hohen magnetischen Streufluß und damit einen zum Öffnen des Ventils aufzubringenden hohen Energieaufwand. Die zentrale Brennstoffzufuhr in Verbindung mit dem abgewinkelten elektrischen Anschlußstecker verhindert die Kontaktierung mehrerer Ventile mittels einer gemeinsamen Steckerleiste und die Reihenschaltung mehrerer hintereinander angeordneter Ventile.The invention is based on an electromagnetically actuated valve according to the preamble of patent claim 1. Such an electromagnetically actuated valve is already known (DE-A-38 25 135), but in which the solenoid coil only partially covers at least one of its circumference Guide the magnetic field lines serving bow-shaped guide element is surrounded. In addition, plastic material of a plastic extrusion coating is located in a gap formed between the magnet coil and the guide element. The unfavorably designed magnetic field causes a high magnetic leakage flux and thus a high energy expenditure to open the valve. The central fuel supply in connection with the angled electrical connector prevents the contacting of several valves by means of a common connector strip and the series connection of several valves arranged one behind the other.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Ventil mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat demgegenüber den Vorteil eines kompakten Ventils mit einem kompakten Magnetkreis. Ein kurzer Weg der das magnetische Feld bildenden geschlossenen Feldlinien und der umhüllende Gehäusemantel verringern den magnetischen Streufluß und erhöhen damit das für die einzusetzende Energie entscheidende Verhältnis zwischen Nutzfluß und Streufluß, so daß zum Öffnen des Ventils ein geringerer Energieaufwand erforderlich ist. Der Gehäusemantel ermöglicht eine kompakte und einfache Bauform des Ventils und damit auch eine kostengünstige Montage bei der Herstellung. Besonders vorteilhaft ist es, wenn der metallene Gehäusemantel mit dem Verbindungsteil durch Schweißen dicht verbunden ist, weil so zugleich die notwendige Abdichtung zwischen dem Gehäusemantel und dem Verbindungsteil ausgebildet wird.The valve according to the invention with the characterizing features of claim 1 has the advantage of a compact valve with a compact magnetic circuit. A short way of the magnetic Field-forming closed field lines and the enveloping housing jacket reduce the magnetic leakage flux and thus increase the ratio between useful flow and leakage flow which is decisive for the energy to be used, so that less energy is required to open the valve. The housing jacket enables a compact and simple design of the valve and thus also an inexpensive assembly during manufacture. It is particularly advantageous if the metal housing jacket is tightly connected to the connecting part by welding, because at the same time the necessary seal is formed between the housing jacket and the connecting part.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Patentanspruch 1 angegebenen Ventils möglich.The measures listed in the subclaims allow advantageous developments and improvements of the valve specified in claim 1.

Vorteilhaft ist es, wenn der Gehäusemantel eine nach außen weisende Gehäuseschulter aufweist, die zusammen mit einer in Richtung der Gehäuseschulter weisenden Stirnfläche der Kunststoffummantelung die Seitenflächen einer Ringnut bildet, deren Nutgrund durch den Umfang des Gehäusemantels gebildet wird. Die Gehäuseschulter verhindert, daß ein auf dem Umfang des Gehäusemantels montierter Dichtring beim Ausbau des Ventils aus einer Ventilaufnahme nicht in dieser Aufnahme verbleibt.It is advantageous if the housing jacket has an outwardly facing housing shoulder which, together with an end face of the plastic casing facing in the direction of the housing shoulder, forms the side faces of an annular groove, the groove base of which is formed by the circumference of the housing jacket. The housing shoulder prevents a sealing ring mounted on the circumference of the housing jacket from remaining in this receptacle when the valve is removed from a valve receptacle.

Um das Herunterrutschen des Dichtrings vom Gehäusemantel zu verhindern, ist es ebenfalls vorteilhaft, wenn am Umfang des Gehäusemantels eine Ringnut vorgesehen ist, deren radial sich erstreckende Seitenflächen durch eine in Richtung des Ankers weisende Stirnfläche der Kunststoffummantelung und eine Stirnfläche eines auf den Gehäusemantel aufgezogenen Ziehringes und deren Nutgrund durch den Umfang des Gehäusemantels gebildet wird.In order to prevent the sealing ring from slipping off the housing shell, it is also advantageous if an annular groove is provided on the circumference of the housing shell, the radially extending side surfaces of which face an end face of the plastic sheathing pointing in the direction of the armature and an end face of a pull ring drawn onto the housing shell and the bottom of the groove is formed by the circumference of the housing shell.

Besonders vorteilhaft ist es, wenn zwischen einem oberen Dichtring am Gehäusemantel und einem unteren Dichtring am Verbindungsteil mindestens eine, dem Brennstoffzulauf dienende radiale Queröffnung ausgebildet ist, die mit einem bis zum Ventilsitz reichenden Ventilraum in Verbindung steht. Die seitliche Brennstoffzufuhr und die axial angeordneten elektrischen Anschlußstecker erlauben eine Reihenspülung mehrerer hintereinander angeordneter Ventile mit dem Brennstoff, die volle Integration mehrerer Ventile in Aufnahmen des Saugrohrs der Brennkraftmaschine sowie die gemeinsame Kontaktierung mittels einer gemeinsamen Steckerleiste.It is particularly advantageous if at least one radial transverse opening serving to feed the fuel is formed between an upper sealing ring on the housing jacket and a lower sealing ring on the connecting part, said radial opening being in communication with a valve space extending to the valve seat. The side fuel supply and the axially arranged electrical connector allow a series flushing of several valves arranged in series with the fuel, the full integration of several valves in receptacles of the intake manifold of the internal combustion engine and the common contacting by means of a common connector strip.

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 in der Zeichnung beispielsweise dargestellte elektromagnetisch betätigbare Ventil in Form eines Einspritzventils für Brennstoffeinspritzanlagen von Brennkraftmaschinen hat einen hohlen Kern 1, den eine einen in radialer Richtung gestuften Spulenkörper 7 aufweisende und mit einer in radialer Richtung gestuften Bewicklung versehene Magnetspule 2 teilweise umgibt. Anschließend an ein unteres Kernende 4 des Kerns 1 ist mit diesem konzentrisch zu einer Ventillängsachse 5 ein hohles Zwischenteil 6 durch Schweißen dicht verbunden. An seinem dem Kern 1 abgewandten Ende ist das Zwischenteil 6 mit einem rohrförmigen, zylindrischen Verbindungsteil 8 dicht verschweißt. Die Aneinanderreihung von Kern 1, Zwischenteil 6 und Verbindungsteil 8 stellt somit eine starre metallene Einheit dar.The electromagnetically actuated valve shown in the drawing, for example, in the form of an injection valve for fuel injection systems of internal combustion engines has a hollow core 1, which has a coil former 7 which is stepped in the radial direction and is provided with a winding which is stepped in the radial direction Magnetic coil 2 partially surrounds. Subsequent to a lower core end 4 of the core 1, a hollow intermediate part 6 is tightly connected thereto by welding, concentrically with a valve longitudinal axis 5. At its end facing away from the core 1, the intermediate part 6 is tightly welded to a tubular, cylindrical connecting part 8. The lining up of core 1, intermediate part 6 and connecting part 8 thus represents a rigid metal unit.

In Richtung der Ventillängsachse 5 ist in eine Kernbohrung 17 des Kerns 1 ein vorzugsweise eine gehärtete Oberfläche aufweisendes Kugelelement 25 eingepreßt, dessen Einpreßtiefe die Federkraft einer Rückstellfeder 26 bestimmt, die unmittelbar an dem Kugelelement 25 anliegt. Mit ihrem dem Kugelelement 25 abgewandten Ende stützt sich die Rückstellfeder 26 an einer Stirnseite eines Verbindungsrohres 11 ab, das an seinem dem Kern 1 zugewandten Ende mit einem Anker 12, der gleichzeitig als radiale Führung der Rückstellfeder 26 dient, durch Schweißen verbunden ist. An dem dem Anker 12 abgewandten Ende des Verbindungsrohres 11 ist durch Schweißen ein als Kugel ausgebildeter Ventilschließkörper 10 befestigt, der mit einem festen Ventilsitz 15 zusammenwirkt.In the direction of the longitudinal axis 5 of the valve, a ball element 25, preferably having a hardened surface, is pressed into a core bore 17 of the core 1, the press-in depth of which determines the spring force of a return spring 26, which rests directly on the ball element 25. With its end facing away from the ball element 25, the return spring 26 is supported on an end face of a connecting tube 11, which is connected at its end facing the core 1 to an armature 12, which at the same time serves as a radial guide for the return spring 26, by welding. At the end of the connecting tube 11 facing away from the armature 12, a valve-closing body 10 designed as a ball is fastened by welding and cooperates with a fixed valve seat 15.

Mit dem Verbindungsteil 8 ist durch Schweißen ein den festen Ventilsitz 15 aufweisender Ventilsitzkörper 14 dicht verbunden. Stromabwärts des konisch verlaufenden Ventilsitzes 15 ist im Ventilsitzkörper 14 wenigstens eine Abspritzöffnung 18 ausgebildet.A valve seat body 14 having the fixed valve seat 15 is tightly connected to the connecting part 8 by welding. At least one spray orifice 18 is formed in the valve seat body 14 downstream of the conical valve seat 15.

Zumindest teilweise der Kern 1, vollständig die Magnetspule 2 und ein Teil des Verbindungsteiles 8 sind in axialer Richtung von einem den magnetischen Kreis schließenden metallenen Gehäusemantel 3 umschlossen, der aus Blech durch Tiefziehen oder Drücken hergestellt ist und mit einem oberen Ende 35 mit geringerem Durchmesser den Kern 1 umgreift. Der Gehäusemantel 3 ist an seinem oberen Ende 35 mit dem Kern 1 durch Schweißen mindestens punktweise und an seinem unteren Ende 36 mit dem Verbindungsteil 8 durch Schweißen dicht verbunden. Zur Vermeidung von Luftspalten ist der Gehäusemantel 3 so ausgeführt, daß er mit seinem oberen Ende 35 an dem Kern 1 und mit seinem unteren Ende 36 an dem Verbindungsteil 8 eng anliegt. Vom oberen Ende 35 ausgehend erstreckt sich die Magnetspule 2 umgreifend in radialer Richtung nach außen ein Boden 37 des Gehäusemantels 3 zum mit größerem Durchmesser versehenen zylindrischen Mantelteil 38 mit dem unteren Ende 36.At least partially the core 1, completely the magnetic coil 2 and part of the connecting part 8 are enclosed in the axial direction by a metal casing 3 closing the magnetic circuit, which is made of sheet metal by deep drawing or pressing and with an upper end 35 with a smaller diameter Encompasses core 1. The housing shell 3 is at its upper end 35 with the core 1 by welding at least in places and at its lower end End 36 tightly connected to the connecting part 8 by welding. In order to avoid air gaps, the housing jacket 3 is designed such that its upper end 35 fits tightly against the core 1 and with its lower end 36 against the connecting part 8. Starting from the upper end 35, the magnetic coil 2 extends radially outward around a bottom 37 of the housing shell 3 to the larger-diameter cylindrical shell part 38 with the lower end 36.

Das Verbindungsteil 8 weist in dem dargestellten Ausführungsbeispiel zwischen einem oberen Dichtring 39 am Mantelteil 38 des Gehäusemantels 3 und einem unteren Dichtring 40 am Verbindungsteil 8 mindestens eine dem Brennstoffzulauf dienende radiale Queröffnung 20 auf, die mit dem bis zum Ventilsitz 15 reichenden Ventilraum 16 im Innern des Verbindungsteils 8 in Verbindung steht. Beim vorliegenden Ausführungsbeispiel ist die Queröffnung 20 im Verbindungsteil 8 ausgebildet, sie kann jedoch auch in Höhe des Mantelteils 38 verlaufen.The connecting part 8 has in the illustrated embodiment between an upper sealing ring 39 on the casing part 38 of the housing shell 3 and a lower sealing ring 40 on the connecting part 8 at least one radial cross opening 20 serving the fuel inlet, which with the valve seat 15 reaching valve chamber 16 inside the Connection part 8 is connected. In the present exemplary embodiment, the transverse opening 20 is formed in the connecting part 8, but it can also run at the level of the jacket part 38.

Mittels einer Nut 43 im Verbindungsteil 8 und eines Absatzes 44 an dem Verbindungsteil 8 wird ein Trägerring 32 gehalten, der einen Brennstoffilter 33 aufweist, über den Brennstoff zur Queröffnung 20 strömen kann.By means of a groove 43 in the connecting part 8 and a shoulder 44 on the connecting part 8, a carrier ring 32 is held, which has a fuel filter 33, through which fuel can flow to the transverse opening 20.

Der Spulenkörper 7 der Magnetspule 2 wird durch eine Kunststoffumspritzung hergestellt, mittels der zugleich die zur Kontaktierung der Magnetspule 2 erforderlichen elektrischen Anschlußstecker 30 mitangespritzt werden, so daß ein eigenständiges Kunststoffspritzgußteil gebildet wird. Dieses Kunststoffspritzgußteil wird in den Gehäusemantel 3 derart eingesetzt, daß es am Boden 37 anliegt und die Anschlußstecker 30 durch Durchgangsöffnungen 45 im Boden 37 nach außen etwa parallel zur Ventillängsachse 5 in Richtung zum oberen Ende 35 ragen.The coil body 7 of the magnet coil 2 is produced by a plastic extrusion coating, by means of which the electrical connecting plugs 30 required for contacting the magnet coil 2 are also molded on, so that an independent plastic injection molding is formed. This plastic injection molded part is inserted into the housing shell 3 in such a way that it bears against the bottom 37 and the connecting plugs 30 protrude outward through through openings 45 in the bottom 37 approximately parallel to the longitudinal valve axis 5 in the direction of the upper end 35.

Die Kernbohrung 17 ist an ihrem dem Ventilschließkörper 10 abgewandten Ende durch einen Kunststoffstopfen 31 verschlossen, so daß beim Spritzen einer Kunststoffummantelung 22, die das dem Ventilsitzkörper 14 abgewandte Ende des Ventils am Boden 37 und einen Teil der Anschlußstecker 30 umgibt, kein flüssiger Kunststoff in die Kernbohrung 17 gelangen kann. Die Kunststoffummantelung 22 erstreckt sich radial über den Boden 37 hinaus. Die Abdichtung der Kernbohrung 17 gegenüber des sich im Ventilinnern befindlichen Brennstoffs erfolgt mittels des in die Kernbohrung 17 eingepreßten Kugelelementes 25.The core bore 17 is closed at its end facing away from the valve closing body 10 by a plastic plug 31, so that when a plastic jacket 22 is injected, which surrounds the end of the valve facing away from the valve seat body 14 at the bottom 37 and part of the connector plug 30, no liquid plastic into the Core hole 17 can reach. The plastic sheath 22 extends radially beyond the bottom 37. The core bore 17 is sealed off from the fuel located in the valve interior by means of the spherical element 25 pressed into the core bore 17.

Am Umfang des Mantelteils 38 des Gehäusemantels 3 ist eine Ringnut 47 vorgesehen, deren radial sich erstreckende Seitenflächen durch die in Richtung des Ankers weisende Stirnfläche 49 der Kunststoffummantelung 22 und die Stirnfläche eines auf das Mantelteil 38 aufgezogenen Ziehringes 23, der beispielsweise eine L-förmige Querschnittsform aufweist, und deren Nutgrund durch den Umfang des Mantelteils 38 gebildet wird. Der Ziehring 23 sorgt beim Ausbau des Ventils aus einer nicht dargestellten Aufnahme in dem Saugrohr einer Brennkraftmaschine dafür, daß ein in der Ringnut montierter oberer Dichtring 39 seine axiale Lage auf dem Umfang des Mantelteils 38 weitgehend beibehält und nicht in der Aufnahme des Saugrohrs verbleibt.An annular groove 47 is provided on the circumference of the casing part 38 of the housing casing 3, the radially extending side surfaces of which are directed through the end face 49 of the plastic casing 22 pointing in the direction of the armature and the end face of a pull ring 23 which is drawn onto the casing part 38 and which, for example, has an L-shaped cross-sectional shape has, and the groove bottom is formed by the circumference of the jacket part 38. The pull ring 23 ensures when removing the valve from a receptacle (not shown) in the intake manifold of an internal combustion engine that an upper sealing ring 39 mounted in the annular groove largely maintains its axial position on the circumference of the casing part 38 and does not remain in the intake manifold receptacle.

Eine andere erfindungsgemäße Ausführungsform besteht darin, daß das Mantelteil 38 eine gestrichelt dargestellte, nach außen weisende Gehäuseschulter 48 aufweist, die zusammen mit der in Richtung der Gehäuseschulter 48 weisenden Stirnfläche der Kunststoffummantelung 22 die Seitenflächen der Ringnut 47 bildet, deren Nutgrund durch den Umfang des Mantelteils 38 gebildet wird. Auch durch diese Lösung ergibt sich, daß ein auf dem Umfang des Mantelteils 38 montierter oberer Dichtring 39 beim Ausbau des Ventils aus einer Aufnahme des Saugrohrs nicht in dieser Aufnahme verbleibt.Another embodiment of the invention is that the casing part 38 has a dashed, outwardly facing housing shoulder 48 which, together with the end face of the plastic casing 22 pointing in the direction of the casing shoulder 48, forms the side faces of the annular groove 47, the groove base of which through the circumference of the casing part 38 is formed. This solution also results in that an upper sealing ring 39 mounted on the circumference of the jacket part 38 does not remain in this receptacle when the valve is removed from a receptacle of the intake manifold.

Der untere Dichtring 40 wird am Verbindungsteil 8 in einer unteren Ringnut 50 gehalten, die durch zwei mit axialem Abstand voneinander radial nach außen verlaufenden Schultern 51, 52 des Verbindungsteils 8 begrenzt wird.The lower sealing ring 40 is held on the connecting part 8 in a lower annular groove 50, which is delimited by two shoulders 51, 52 of the connecting part 8 which run radially outward from one another.

Die Führung des Ankers 12 erfolgt in einer Gleitöffnung 54 des Zwischenteils 6, während der Ventilschließkörper 10 in einer Führungsöffnung 55 des Ventilsitzkörpers 14 gleitbar gelagert ist.The armature 12 is guided in a slide opening 54 of the intermediate part 6, while the valve closing body 10 is slidably mounted in a guide opening 55 of the valve seat body 14.

Das Ventil mit dem den magnetischen Kreis schließenden metallenen Gehäusemantel 3 ermöglicht nicht nur ein kompaktes, zum Öffnen des Ventils einen geringen Energieaufwand erforderndes Magnetfeld, sondern auch einen kompakten und einfachen Aufbau. Im Zusammenhang mit den axialen Anschlußsteckern 30 und dem radialen Brennstoffzulauf erlauben Ventile nach der Erfindung eine Reihenspülung mehrerer hintereinander angeordneter Ventile sowie ihre gemeinsame elektrische Kontaktierung mittels einer gemeinsamen Steckerleiste.The valve with the metal housing shell 3 closing the magnetic circuit enables not only a compact magnetic field that requires little energy to open the valve, but also a compact and simple construction. In connection with the axial connecting plugs 30 and the radial fuel feed, valves according to the invention allow a series flushing of several valves arranged one behind the other and their common electrical contacting by means of a common plug connector.

Claims (4)

  1. Electromagnetically operable valve, in particular an injection valve for fuel injection systems of internal combustion engines, having a core (1) surrounded by a solenoid (25), having an armature (12) by means of which a valve closing member (10) which interacts with a fixed valve seat (15) can be operated, having a tubular metal adapter (6) which is connected in a sealing manner with its one end to a core end (4) of the core (1) which faces the armature (12) and with its other end to a tubular connecting part (8), having a metal valve seating member (14) which has the fixed valve seat (15) and is fixed to the connecting part (8) at its end averted from the adapter (6), and having a plastic sheath (22) which surrounds the end of the valve averted from the valve seating member (14), the valve being enclosed at least partially by a metal housing shell (3) which closes the magnetic circuit, is connected at its upper end (35) to the core (1) and its lower end (36) to the connecting part (8), and overlaps the solenoid (2) at least in the axial direction, characterized in that the metal housing shell (3) is connected in a sealing manner to the connecting part (8) by welding.
  2. Valve according to Claim 1, characterized in that the housing shell (3) has a housing shoulder (48) which points outwards and together with an end face (49) of the plastic sheath (22) which points in the direction of the housing shoulder (48) forms the end faces of an annular groove (47) of which the groove bottom is formed by the circumference of the housing shell (3).
  3. Valve according to one of Claims 1 or 2, characterized in that there is provided on the circumference of the housing shell (3) an annular groove (47) whose radially extending end faces are formed by an end face (49), pointing in the direction of the armature (12), of the plastic sheath (22) and an end face of a draw ring (23) drawn up onto the housing shell (3), and whose groove bottom is formed by the circumference of the housing shell (3).
  4. Valve according to one of Claims 1 to 3, characterized in that there is constructed between an upper gasket ring (39) on the housing shell (3) and a lower gasket ring (40) on the connecting part (8) at least one radial transverse opening (20) which serves to feed fuel and which is connected to a valve chamber (16) reaching up to the valve seat (15).
EP91902270A 1990-02-03 1991-01-21 Electromagnetically operated valve Expired - Lifetime EP0516632B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4003229 1990-02-03
DE4003229A DE4003229A1 (en) 1990-02-03 1990-02-03 ELECTROMAGNETICALLY ACTUABLE VALVE
PCT/DE1991/000052 WO1991011605A2 (en) 1990-02-03 1991-01-21 Electromagnetically operated valve

Publications (2)

Publication Number Publication Date
EP0516632A1 EP0516632A1 (en) 1992-12-09
EP0516632B1 true EP0516632B1 (en) 1994-08-24

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EP91902270A Expired - Lifetime EP0516632B1 (en) 1990-02-03 1991-01-21 Electromagnetically operated valve

Country Status (9)

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US (1) US5330153A (en)
EP (1) EP0516632B1 (en)
JP (1) JP3262793B2 (en)
KR (1) KR100195822B1 (en)
BR (1) BR9105982A (en)
DE (2) DE4003229A1 (en)
ES (1) ES2061230T3 (en)
RU (1) RU2047034C1 (en)
WO (1) WO1991011605A2 (en)

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Also Published As

Publication number Publication date
KR100195822B1 (en) 1999-06-15
WO1991011605A3 (en) 1991-09-19
EP0516632A1 (en) 1992-12-09
JPH05504182A (en) 1993-07-01
DE4003229A1 (en) 1991-08-08
US5330153A (en) 1994-07-19
DE59102646D1 (en) 1994-09-29
KR920704002A (en) 1992-12-18
JP3262793B2 (en) 2002-03-04
WO1991011605A2 (en) 1991-08-08
BR9105982A (en) 1992-11-10
ES2061230T3 (en) 1994-12-01
RU2047034C1 (en) 1995-10-27

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