EP0516632A1 - Electromagnetically operated valve. - Google Patents

Electromagnetically operated valve.

Info

Publication number
EP0516632A1
EP0516632A1 EP91902270A EP91902270A EP0516632A1 EP 0516632 A1 EP0516632 A1 EP 0516632A1 EP 91902270 A EP91902270 A EP 91902270A EP 91902270 A EP91902270 A EP 91902270A EP 0516632 A1 EP0516632 A1 EP 0516632A1
Authority
EP
European Patent Office
Prior art keywords
valve
core
housing
connecting part
facing
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
EP91902270A
Other languages
German (de)
French (fr)
Other versions
EP0516632B1 (en
Inventor
Ferdinand Reiter
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
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0516632A1 publication Critical patent/EP0516632A1/en
Application granted granted Critical
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Anticipated expiration legal-status Critical
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Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0614—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 type of the main claim.
  • An electromagnetically actuated valve has already been proposed (German patent application P 38 25 135.3), in which, however, the circumference of the magnetic coil is only partially surrounded by at least one bow-shaped guide element that serves to guide the magnetic field lines .
  • the unfavorably designed magnetic field causes a high magnetic leakage flux and thus a high energy expenditure to be opened 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 the main claim 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 stray flux and thus increase the ratio between useful flow and stray flux 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 a cost-effective assembly during manufacture.
  • the metal housing shell is tightly connected to the connecting part by welding, because the necessary seal between the housing shell and the connecting part is formed at the same time.
  • the housing jacket is made by deep drawing and is tightly fitting with its upper end a 'to the core and with its lower end to the connecting part, so that harmful air gaps are avoided and welding is also simplified.
  • 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 surfaces 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 casing 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 jacket, the radially extending side faces of which face an end face of the plastic jacket facing the armature and an end face of one on the Housing shell drawn pull ring and the groove base 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 connected to a valve space reaching as far as the valve seat.
  • the lateral fuel supply and the axially arranged electrical connecting plugs allow a series flushing of several valves arranged one behind the other with the fuel, the full integration of several valves in receptacles of the intake pipe of the internal combustion engine and the common contacting by means of a common plug connector.
  • 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
  • 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 At the end of the connecting tube 11 facing away from the armature 12, a valve-closing body 10 which is designed as a ball and which cooperates with a fixed valve seat 15 is fastened by welding.
  • a valve seat body 14 having the fixed valve seat 15 is tightly connected to the connecting part 8 by welding. Downstream of the conical valve seat 15, at least one spray opening 18 is formed in the valve seat body 14.
  • 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 in such a way that its upper end 35 bears closely against the core 1 and with its lower end 36 against the connecting part 8.
  • the magnetic coil 2 extends in the radial direction outward, 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 at least one radial transverse opening 20, which serves for the fuel supply, 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, which extends with the valve chamber reaching to the valve seat 15 16 is in the interior of the connecting part 8 in connection.
  • the transverse opening 20 is formed in the connecting part 8, but it can also run at the height 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 connecting plug 30, no liquid plastic can get into the core hole 17.
  • 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 casing 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 a L-shaped cross-sectional shape, 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 a. in the annular groove-mounted upper sealing ring 39 largely maintains its axial position on the circumference of the casing part 38 and does not remain in the receptacle of the suction pipe.
  • the jacket part 38 has a dashed, outwardly facing housing shoulder 48 which, together with the end face of the plastic casing 22 facing in the direction of the housing shoulder 48, forms the side faces of the annular groove 47, the groove bottom of which is formed by the circumference of the jacket part 38 is formed.
  • This solution also means 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 connector strip.

Landscapes

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

Abstract

Dans les soupapes à commande électromagnétique déjà proposées, comportant un noyau entouré par une bobine magnétique ainsi qu'un induit actionnant un élément de fermeture de la soupape qui coopère avec un siège de soupape fixe, la bobine magnétique est entourée à sa périphérie par au moins un élément de guidage recourbé servant à guider les lignes de champ magnétique, ce qui provoque un flux de dispersion gênant. La nouvelle soupape est entourée au moins partiellement par une enveloppe de carter (3) métallique fermant le circuit magnétique, enveloppe qui est étroitement solidaire du noyau (1) à son extrémité supérieure (35) et de la pièce de jonction (8) à son extrémité inférieure (36) et qui dépasse, au moins dans le sens axial, par rapport à la bobine magnétique (2). Cette configuration de soupape convient en particulier pour une soupape d'injection d'un système d'injection de carburant.In the electromagnetic control valves already proposed, comprising a core surrounded by a magnetic coil as well as an armature actuating a valve closing element which cooperates with a fixed valve seat, the magnetic coil is surrounded at its periphery by at least a curved guide element for guiding the magnetic field lines, which causes an annoying dispersion flow. The new valve is surrounded at least partially by a metal casing casing (3) closing the magnetic circuit, a casing which is closely secured to the core (1) at its upper end (35) and the junction piece (8) to its lower end (36) and which protrudes, at least in the axial direction, relative to the magnetic coil (2). This valve configuration is particularly suitable for an injection valve of a fuel injection system.

Description

Elektromagnetisch betätiσbares Ventil Electromagnetically actuated valve
Stand der TechnikState of the art
Die Erfindung geht aus von einem elektromagnetisch betätigbaren Ven¬ til nach der Gattung des Hauptanspruchs. Es ist bereits ein elektro¬ magnetisch betätigbares Ventil vorgeschlagen worden (deutsche Pa¬ tentanmeldung P 38 25 135.3), bei dem aber die Magnetspule über ih¬ ren Umfang nur zum Teil von wenigstens einem zur Führung der Magnet¬ feldlinien dienenden bügeiförmigen Leitelement- umgeben ist. Zudem befindet sich in einem zwischen der Magnetspule und dem Leitelement gebildeten Spalt Kunststoff aterial einer Kunststoffu spritzung. Das ungünstig ausgebildete Magnetfeld bedingt einen hohen magnetischen Streufluß und damit einen zum Öffnen des Ventils aufzubringenden ho¬ hen Energieaufwand. Die zentrale Brennstoffzufuhr in Verbindung mit dem abgewinkelten elektrischen Anschlußstecker verhindert die Kon- taktierung 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 type of the main claim. An electromagnetically actuated valve has already been proposed (German patent application P 38 25 135.3), in which, however, the circumference of the magnetic coil is only partially surrounded by at least one bow-shaped guide element that serves to guide the magnetic field lines . In addition, there is plastic aterial plastic injection in a gap formed between the solenoid and the guide element. The unfavorably designed magnetic field causes a high magnetic leakage flux and thus a high energy expenditure to be opened 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 Hauptanspruchs hat demgegenüber den Vorteil eines kompakten Ventils mit einem kompakten Magnetkreis. Ein kurzer Weg der das magnetische Feld bildenden geschlossenen Feldlinien und der umhüllende Gehäuse¬ mantel 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 ko¬ stengünstige Montage bei der Herstellung.The valve according to the invention with the characterizing features of the main claim 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 stray flux and thus increase the ratio between useful flow and stray flux 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 a cost-effective assembly during manufacture.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vor¬ teilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Ventils möglich.Advantageous further developments and improvements of the valve specified in the main claim are possible through the measures listed in the subclaims.
Besonders vorteilhaft ist es, wenn der metallene Gehäus.emantel mit dem Verbindungsteil durch Schweißen dicht verbunden ist, weil so zu¬ gleich die notwendige Abdichtung zwischen dem Gehäusemantel und dem Verbindungsteil ausgebildet wird.It is particularly advantageous if the metal housing shell is tightly connected to the connecting part by welding, because the necessary seal between the housing shell and the connecting part is formed at the same time.
Es ist ebenfalls vorteilhaft, wenn der Gehäusemantel durch Tiefzie¬ hen gefertigt.ist und mit seinem oberen Ende a 'dem Kern sowie"mit seinem unteren Ende an dem Verbindungsteil eng anliegt, so daß schädliche Luftspalte vermieden und zudem das Schweißen vereinfacht wird.It is also advantageous if the housing jacket is made by deep drawing and is tightly fitting with its upper end a 'to the core and with its lower end to the connecting part, so that harmful air gaps are avoided and welding is also simplified.
Vorteilhaft ist es auch, wenn der Gehäusemantel eine nach außen wei¬ sende Gehäuseschulter aufweist, die zusammen mit einer in Richtung der Gehäuseschulter weisenden Stirnfläche der Kunststoffummantelung die Seitenflächen einer Ringnut bildet, deren Nutgrund durch den Um¬ fang des Gehäusemantels gebildet wird. Die Gehäuseschulter verhin¬ dert, daß ein auf dem Umfang des Gehäusemantels montierter Dichtring beim Ausbau des Ventils aus einer Ventilaufnahme nicht in dieser Aufnahme verbleibt. Um das Herunterrutschen des Dichtrings vom Gehäusemantel zu verhin¬ dern, ist es ebenfalls vorteilhaft, wenn am Umfang des Gehäuseman¬ tels 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 Gehäu¬ semantel aufgezogenen Ziehringes und deren Nutgrund durch den Umfang des Gehäusemantels gebildet wird.It is also 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 surfaces 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 casing from remaining in this receptacle when the valve is removed from a valve receptacle. In order to prevent the sealing ring from slipping off the housing jacket, it is also advantageous if an annular groove is provided on the circumference of the housing jacket, the radially extending side faces of which face an end face of the plastic jacket facing the armature and an end face of one on the Housing shell drawn pull ring and the groove base 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 min¬ destens eine, dem Brennstoffzulauf dienende radiale Queröffnung aus¬ gebildet ist, die mit einem bis zum Ventilsitz reichenden Ventilraum in Verbindung steht. Die seitliche Brennstoffzufuhr und die axial angeordneten elektrischen Anschlußstecker erlauben eine Reihenspü¬ lung mehrerer hintereinander angeordneter Ventile mit dem Brenn¬ stoff, die volle Integration mehrerer Ventile in Aufnahmen des Saug¬ rohrs der Brennkraftmaschine sowie die gemeinsame Kontaktierung mit¬ tels 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 connected to a valve space reaching as far as the valve seat. The lateral fuel supply and the axially arranged electrical connecting plugs allow a series flushing of several valves arranged one behind the other with the fuel, the full integration of several valves in receptacles of the intake pipe of the internal combustion engine and the common contacting by means of a common plug connector.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung verein¬ facht dargestellt und in der nachfolgenden Beschreibung näher erläu¬ tert.An embodiment of the invention is shown in simplified form in the drawing and is 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 Brennstoffein¬ spritzanlagen 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 KernendeThe 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 des Kerns 1 ist mit diesem konzentrisch zu einer Ventillängsachse4 of the core 1 is concentric with this to a valve longitudinal axis
5 ein hohles Zwischenteil 6 durch Schweißen dicht verbunden. An sei¬ nem 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.5 a hollow intermediate part 6 tightly connected by welding. 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 Ku¬ gelelement 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 ausgebil¬ deter -Ventilschließkörper 10 befestigt, der mit einem festen Ventil¬ sitz 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 which is designed as a ball and which cooperates with a fixed valve seat 15 is fastened by welding.
Mit dem Verbindungsteil 8 ist durch Schweißen ein den festen Ventil¬ sitz 15 aufweisender Ventilsitzkörper 14 dicht verbunden. Stromab¬ wärts des konisch verlaufenden Ventilsitzes 15 ist im Ventilsitzkör¬ per 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. Downstream of the conical valve seat 15, at least one spray opening 18 is formed in the valve seat body 14.
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 um¬ schlossen, 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 ausge¬ führt, 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 En¬ de 35 ausgehend erstreckt sich die Magnetspule 2 umgreifend in ra¬ dialer 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 a 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 one Diameter surrounds the 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. To avoid air gaps, the housing jacket 3 is designed in such a way that its upper end 35 bears closely 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 in the radial direction outward, 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 Gehäuseman¬ tels 3 und einem unteren Dichtring 40 am Verbindungsteil 8 minde¬ stens 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 Aus¬ führungsbeispiel ist die Queröffnung 20 im Verbindungsteil 8 ausge¬ bildet, sie kann jedoch auch in Höhe des Mantelteils 38 verlaufen.In the exemplary embodiment shown, the connecting part 8 has at least one radial transverse opening 20, which serves for the fuel supply, 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, which extends with the valve chamber reaching to the valve seat 15 16 is in the interior of the connecting part 8 in connection. In the present exemplary embodiment, the transverse opening 20 is formed in the connecting part 8, but it can also run at the height 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 Kunststoffum- spritzung hergestellt, mittels der zugleich die zur Kontaktierung der Magnetspule 2 erforderlichen elektrischen Anschlußstecker 30 mitangespritzt werden, so daß ein eigenständiges Kunststoffspritz¬ gußteil 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. Die Kernbohrung 17 ist an ihrem dem Ventilschließk rper 10 abgewand- ten Ende durch einen Kunststoffstopfen 31 verschlossen, so daß beim Spritzen einer Kunststoffummantelung 22, die das dem Ventilsitzkör¬ per 14 abgewandte Ende des Ventils am Boden 37 und einen Teil der Anschlußstecker 30 umgibt, kein flüssiger Kunststoff in die Kernboh¬ rung 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 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 connecting plug 30, no liquid plastic can get into the core hole 17. 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 Kunststoffum¬ mantelung 22 und die Stirnfläche eines auf das Mantelteil 38 aufge¬ zogenen Ziehringes 23, der beispielsweise eine L-förmige Quer¬ schnittsform aufweist, und deren Nutgrund durch den Umfang des Man¬ telteils 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 ver¬ bleibt.An annular groove 47 is provided on the circumference of the casing part 38 of the casing 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 a L-shaped cross-sectional shape, 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 a. in the annular groove-mounted upper sealing ring 39 largely maintains its axial position on the circumference of the casing part 38 and does not remain in the receptacle of the suction pipe.
Eine andere erfindungsgemäße Ausführungsform besteht darin, daß das Mantelteil 38 eine gestrichelt dargestellte, nach außen weisende Ge¬ häuseschulter 48 aufweist, die zusammen mit der in Richtung der Ge¬ häuseschulter 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 er¬ gibt sich, daß ein auf dem Umfang des Mantelteils 38 montierter obe¬ rer Dichtring 39 beim Ausbau des Ventils aus einer Aufnahme des Saugrohrs nicht in dieser Aufnahme verbleibt. 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.Another embodiment according to the invention is that the jacket part 38 has a dashed, outwardly facing housing shoulder 48 which, together with the end face of the plastic casing 22 facing in the direction of the housing shoulder 48, forms the side faces of the annular groove 47, the groove bottom of which is formed by the circumference of the jacket part 38 is formed. This solution also means 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.
Die Führung des Ankers 12 erfolgt in einer Gleitöffnung 54 des Zwi¬ schenteils 6, während der Ventilschließkörper 10 in einer Führungs¬ öffnung 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, son¬ dern 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 hin¬ tereinander angeordneter Ventile sowie ihre gemeinsame elektrische Kontaktierung mittels einer gemeinsamen Steckerleiste. The valve with the metallic housing shell 3 closing the magnetic circuit not only enables a compact magnetic field that requires little energy to open the valve, but also a compact and simple construction. In connection with the axial connector 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 connector strip.

Claims

Ansprüche Expectations
1. Elektromagnetisch betätigbares Ventil, insbesondere Einspritzven¬ til für Brennstoffeinspritzanlagen von Brennkraftmaschinen mit einem von einer Magnetspule umgebenen Kern, mit einem Anker, durch den ein mit einem festen Ventilsitz zusammenwirkender Ventilschließkörper betätigbar ist, mit einem rohrförmigen metallenen Zwischenteil, das mit seinem einen Ende mit einem, dem Anker zugewandten Kernende des Kerns und mit seinem anderen Ende mit einem rohrförmigen Verbin¬ dungsteil dicht verbunden ist, mit einem den festen -Ventilsitz "auf¬ weisenden, an dem Verbindungsteil an seinem dem Zwischenteil abge¬ wandten Ende befestigten, metallenen Ventilsitzkörper sowie mit ei¬ ner das dem Ventilsitzkörper abgewandte Ende des Ventils umgebenen Kunststoffummantelung, dadurch gekennzeichnet, daß das Ventil zumin¬ dest teilweise von einem den magnetischen Kreis schließenden metal¬ lenen Gehäusemantel (3) umschlossen ist, der an seinem oberen Ende (35) mit dem Kern (1) und an seinem unteren Ende (36) mit dem Ver¬ bindungsteil (8) verbunden ist und zumindest in axialer Richtung die Magnetspule (2) überragt.1. Electromagnetically actuated valve, in particular injection valve for fuel injection systems of internal combustion engines with a core surrounded by a magnet coil, with an armature, by means of which a valve closing body cooperating with a fixed valve seat can be actuated, with a tubular metal intermediate part, which has one end with it a, the armature facing the core end of the core and extension part tightly connected at its other end with a tubular Verbin¬, auf¬ facing with the fixed -Ventilsitz "abge¬ on the connecting part at its intermediate portion toward the end fixed, metal valve seat body and with a plastic casing surrounding the end of the valve facing away from the valve seat body, characterized in that the valve is at least partially enclosed by a metallic casing casing (3) which closes the magnetic circuit and is connected at its upper end (35) to the Kern (1) and an s a lower end (36) is connected to the connecting part (8) and projects beyond the magnetic coil (2) at least in the axial direction.
2. Ventil nach Anspruch 1, dadurch gekennzeichnet, daß der metallene Gehäusemantel (3) mit dem Verbindungsteil (8) durch Schweißen dicht verbunden ist. 2. Valve according to claim 1, characterized in that the metal housing shell (3) with the connecting part (8) is tightly connected by welding.
3. Ventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Gehäusemantel (3) durch Tiefziehen gefertigt ist und mit seinem obe¬ ren Ende (35) an dem Kern (1) sowie mit seinem unteren Ende (36) an dem Verbindungsteil (8) eng anliegt.3. Valve according to claim 1 or 2, characterized in that the housing jacket (3) is made by deep drawing and with its obe¬ ren end (35) on the core (1) and with its lower end (36) on the connecting part ( 8) fits tightly.
4. Ventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Gehäusemantel (3) eine nach außen weisende Gehäuseschulter (48) aufweist, die zusammen mit einer in Richtung der Gehäuseschul¬ ter (48) weisenden Stirnfläche (49) der Kunststoffummantelung (22) die Seitenflächen einer Ringnut (47) bildet, deren Nutgrund durch den Umfang des Gehäusemantels (3) gebildet wird.4. Valve according to one of claims 1 to 3, characterized in that the housing jacket (3) has an outwardly facing housing shoulder (48) which, together with an in the direction of the housing shoulder (48) facing end face (49) of the plastic casing (22) forms the side surfaces of an annular groove (47), the groove base of which is formed by the circumference of the housing shell (3).
5. Ventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß am Umfang des Gehäusemantels (3) eine Ringnut (47) vorgesehen ist, deren radial sich erstreckende Seitenflächen durch eine in Richtung des Ankers (12) weisende Stirnfläche (49) der Kunststoffum¬ mantelung (22) und eine Stirnfläche eines auf den Gehäusemantel (3) aufgezogenen Ziehringes (23) und deren Nutgrund durch den Umfang des Gehäusemantels (3) gebildet wird. -5. Valve according to one of claims 1 to 3, characterized in that an annular groove (47) is provided on the circumference of the housing shell (3), the radially extending side faces of which in the direction of the armature (12) facing end face (49) Plastic sheathing (22) and an end face of a drawing ring (23) mounted on the housing shell (3) and the bottom of its groove is formed by the circumference of the housing shell (3). -
6. Ventil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zwischen einem oberen Dichtring (39) am Gehäusemantel (3) und einem unteren Dichtring (40) am Verbindungsteil (8) mindestens eine, dem Brennstoffzulauf dienende radiale Queröffnung (20) ausgebildet ist, die mit einem bis zum Ventilsitz (15) reichenden Ventilraum (16) in Verbindung steht. 6. Valve according to one of claims 1 to 5, characterized in that between an upper sealing ring (39) on 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 supply is formed, which is connected to a valve chamber (16) extending 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 true EP0516632A1 (en) 1992-12-09
EP0516632B1 EP0516632B1 (en) 1994-08-24

Family

ID=6399370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91902270A Expired - Lifetime EP0516632B1 (en) 1990-02-03 1991-01-21 Electromagnetically operated valve

Country Status (9)

Country Link
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
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
EP0516632B1 (en) 1994-08-24
ES2061230T3 (en) 1994-12-01
RU2047034C1 (en) 1995-10-27

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