EP1825136A1 - Injection valve - Google Patents

Injection valve

Info

Publication number
EP1825136A1
EP1825136A1 EP05801390A EP05801390A EP1825136A1 EP 1825136 A1 EP1825136 A1 EP 1825136A1 EP 05801390 A EP05801390 A EP 05801390A EP 05801390 A EP05801390 A EP 05801390A EP 1825136 A1 EP1825136 A1 EP 1825136A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve seat
seat carrier
injection
needle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05801390A
Other languages
German (de)
French (fr)
Other versions
EP1825136B1 (en
Inventor
Juergen Lander
Dieter Maier
Franz Thoemmes
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 EP1825136A1 publication Critical patent/EP1825136A1/en
Application granted granted Critical
Publication of EP1825136B1 publication Critical patent/EP1825136B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • 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

Definitions

  • the invention relates to an injection valve, in particular for fuel injection systems of internal combustion engines in motor vehicles, according to the preamble of claim 1.
  • a known injection valve for fuel injection systems for internal combustion engines has a valve seat carrier, in the end a valve seat body is used. On the valve seat body, the valve opening and the valve opening enclosing the valve seat is formed.
  • the hollow cylindrical valve needle is open at its one end of the needle for fuel inlet and at its other end of the needle by a spherical valve closure member which is welded onto the valve needle, and is provided with radial outlet holes for the fuel.
  • the valve seat carrier is connected via an intermediate piece to the hollow cylindrical magnetic core, e.g. by welding, attached.
  • the hollow cylindrical magnetic core is opposite to the formation of a working air gap of the armature, which is formed integrally with the valve needle at this.
  • the valve needle is guided via its armature axially displaceable in the intermediate piece. On the magnetic core is the
  • Magnetic coil consisting of a bobbin and a wound into the bobbin field winding, pushed.
  • the excitation winding is connected to a connector.
  • the remote from the armature end of the magnetic core is formed as a connecting piece for the fuel introduction, in which a fuel filter is used.
  • the magnetic coil is surrounded by a trained as a bracket ferromagnetic guide element, which abuts with its one end to the magnetic core and its other end to the valve seat carrier and with this z. B. is connected by welding or soldering.
  • Magnetic core, magnetic coil with ferromagnetic guide element and valve seat carrier are enclosed by a plastic encapsulation, in which the connector is integrated.
  • the Valve needle is manufactured in so-called.
  • valve needle Metal Injection Molding
  • a binder such as a plastic binder.
  • sintering the binder is removed again.
  • the sleeve or cylindrical valve needle produced in this way in which the outlet holes have already been formed and the magnetic core formed, is connected to the spherical valve closure member by welding at the end face.
  • the injection valve according to the invention with the features of claim 1 has the advantage that the functions of the injection valve are combined on complex components, on the one hand by injection techniques, such as MIM (Metal Injection Molding), CIM (Ceramic Injection Molding) or plastic injection molding can be produced inexpensively and on the other to streamline the assembly line with increased assembly time.
  • injection techniques such as MIM (Metal Injection Molding), CIM (Ceramic Injection Molding) or plastic injection molding
  • valve noise is reduced because the valve seat carrier is a solid component and valve seat and valve needle guide are united in it.
  • the magnetic circuit can be optimized in terms of its iron volume by eliminating support function for solenoid coil and connecting piece so that induced eddy currents are reduced and switching times are shortened and thus the dynamic flow range (DFR) is improved.
  • the hollow cylindrical magnetic core is pressed into the valve seat carrier. Due to the wall thickness of the valve seat carrier is doing a pure press fit sufficient for the strength of the connection, so that the magnetic core does not need to be additionally stapled to the valve seat carrier.
  • the axial insertion depth of the magnetic core determines the maximum stroke of the valve needle.
  • Fig. 2 is a longitudinal section of an injection valve according to a further exemplary embodiment in a half-sectional view.
  • the injector shown schematically in Fig. 1 in longitudinal section is preferably used in fuel injection systems of internal combustion engines in motor vehicles. It has a valve seat carrier 11, a valve needle 12 arranged coaxially in the valve seat carrier 11, an electromagnet 13 for actuating the valve needle 12, and a connecting piece 14 for supplying fuel.
  • the valve seat carrier 11 is made of a hard magnetic material, such as KM57, or a partially curable magnetic material as a so-called. MIM part by injection molding and subsequent sintering by the metal injection molding process. Details of this process can be found in DE 42 30 376 Cl.
  • a valve opening 15 and a valve seat 16 enclosing it are formed or formed in its bottom area.
  • valve seat 16 is ground or honed in the final state.
  • a recess 17 is formed coaxially with the valve opening 15 on the side facing away from the valve seat 16 outside, into which a spray-orifice plate 17 is glued.
  • At its end remote from the valve seat 16 end of the valve seat carrier 11 is provided with an outer circumferential annular groove 18. If the valve seat carrier 11 is not made of hard, but partially curable magnetic material, this is hardened in the region of the valve seat 16. - A -
  • the hollow cylindrical valve needle 12 in the embodiment of Fig. 1 is open at its end facing away from the valve seat 16 for fuel inlet and carries at its valve seat 16 facing the other end a valve closure member 19 which cooperates with the valve seat 16 for releasing and closing the valve opening 15.
  • the valve needle 12 is provided with at least one radially passing through the cylinder wall outlet hole 20.
  • a magnet armature 21 is arranged, via which the valve needle 12 is guided axially displaceably in the valve seat carrier 11.
  • the valve needle 12 with valve closure member 19 and armature 21 is made as a one-piece MIM part of a hard, soft magnetic material.
  • both the exit holes 20 and a flat on the valve closing member 19 aligned flat surface 22 can be prepared.
  • This flat surface 22 serves as a reflection surface for a laser beam in the dry adjustment of the valve lift.
  • the outer contour of the valve closure member 19 cooperating with the valve seat 16 is ground, with any contours, e.g. Ball shape or edge seat with damping cone, can be realized.
  • the electromagnet 13 comprises, in addition to the integrally formed with the valve needle 12 magnet armature 21 an inner, hollow cylindrical magnetic core 23, an outer, deep-drawn magnet pot 24 and a magnetic core 23 and magnetic pot 24 inset magnetic coil 25, in a known manner from a wound on a bobbin exciter winding consists.
  • the magnetic coil 25 is connected to a connector 26.
  • the hollow cylindrical magnetic core 23 is pressed against the valve seat 16 remote from the end of the valve seat support 11 in this. Its Einpresstiefe determines the stroke of the valve needle 12. Due to the relatively large wall thickness of the valve seat carrier 11 is a pure press fit sufficient strength in the
  • the magnet coil 25 and the connector 26 are combined to form a plastic-encased coil part 27, which is manufactured as a separate component outside the assembly line, delivered and pushed onto the valve seat carrier 11.
  • a plastic-coated coil part 27 of the magnet pot 24 is placed, which surrounds the valve seat carrier 11 with its cup bottom 241 and with its cup jacket 242 at the pot opening edge integrally formed on a valve seat carrier 11 radial flange 111 almost without play.
  • the radial flange 11 is arranged at the level of the magnetic core 23 on the valve needle 12.
  • the valve needle 12 is connected to its valve closing member 19 by a trained as a compression spring valve closing spring 28 on the Valve seat 16 pressed on.
  • valve closing spring 28 is supported on the one hand in a radial annular shoulder 121 formed in the interior of the valve needle 12 and on the other hand on an adjusting sleeve 29, which is pressed into the magnetic core 23.
  • the offset of the adjusting sleeve 29 determines the spring bias of the valve closing spring 28 and thus the closing force of the valve needle 12.
  • the connecting piece 14 is made as a separate plastic injection molded part with integrated filter 31. On the one hand, it has an annular web 141, which is able to produce a clip connection with the annular groove 18 on the valve seat carrier 11, and a radially projecting mounting nose 142, which serves as an anti-rotation device and serves for the correct insertion of the injection valve into a fuel manifold.
  • the mounting nose 142 may be offset depending on the type of injection valve in the axial and radial directions on the connecting piece 14.
  • the connecting piece 14 is at the end of the assembly line directed to the spray perforated disk 17 clipped onto the valve seat carrier 11 and bonded to the valve seat carrier 11 and / or the magnet pot 24.
  • the volume of the magnetic circuit formed by the magnetic core 23, magnet pot 24, radial flange 111 and armature 21 is minimized, on the one hand the wall thicknesses of said components as low as possible and on the other hand, the magnetic circuit is rectangular.
  • valve seat carrier 11 and valve needle 12 are not made of soft magnetic material, but made of a hard material in MIM technology.
  • the valve needle 12 can also be produced by a so-called CIM process (Ceramic Injection Molding).
  • the gas tanker 21 is not integrally formed on the valve needle 12, but attached as a separate soft magnetic ring 32 by pressing, welding or positive engagement on the valve needle 12.
  • the valve seat carrier 11 is designed to be thin-walled in its area encompassed by the electromagnet 13, so that as a result of the gradation of the wall thickness, an annular shoulder 112 running around the outside of the valve seat carrier 11 results.
  • the magnetic core 23 is pressed into the thin-walled region of the valve seat carrier 11 and welded thereto.
  • the plastic-molded coil part 27 is on the magnetic core 23 and the thin-walled Area of the valve seat carrier 11 is pushed and preferably glued to both.
  • the deep-drawn magnet pot 24 is placed with its cup bottom 241 on the magnetic core 23 and connected thereto preferably by welding.
  • the annular pot opening is covered by a ring 33 of soft magnetic material, which rests against the annular shoulder 112 of the valve seat carrier 11 and is positively connected with its Innrand with the valve seat carrier 11 and with its outer edge with the pot shell 242 of the magnetic pot 24, for example by pressing or welding ,
  • valve needle can also be designed as a solid plunger welded to one end of the preferably spherical valve closure member and arranged at the other end of the armature, preferably integrally formed, which also serves for axial guidance of the valve needle in the valve seat carrier 11 ,
  • a valve needle is known for example from DE 44 15 850 Al.

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

Abstract

An injection valve is disclosed, in particular, for fuel injection units on internal combustion engines in motor vehicles, comprising a valve seat support (11), a valve needle (12), a solenoid (13) and a connector branch (14) with a filter (31) for introduction of the fuel. According to the invention, functions of the injection valve are distributed among complex components to shorten the assembly line and improve assembly time, whereby the valve opening (15) and valve seat (16) are embodied on the one-piece valve seat support (11) itself, which also guides the valve needle (12) in axial displacement, the solenoid (24) and connector plug (26) are included in a separate plastic-sheathed coil piece (27), the magnet yoke (24) is placed on the coil piece (27) and the connector branch (14) is embodied as a separate injection moulded plastic piece with integrated filter (31). Joint and seal points between the connector branch (14) and the coil piece (27), magnet yoke (24) and/or valve seat support (11) are glued.

Description

EinspritzventilInjector
Stand der TechnikState of the art
Die Erfindung geht aus von einem Einspritzventil, insbesondere für Kraftstoffeinspritzanlagen von Brennkraftmaschinen in Kraftfahrzeugen, nach dem Oberbegriff des Anspruchs 1.The invention relates to an injection valve, in particular for fuel injection systems of internal combustion engines in motor vehicles, according to the preamble of claim 1.
Ein bekanntes Einspritzventil für Kraftstoffeinspritzanlagen für Brennkraftmaschinen (DE 42 30 376 Cl) weist einen Ventilsitzträger auf, in dem endseitig ein Ventilsitzkörper eingesetzt ist. An dem Ventilsitzkörper ist die Ventilöffnung und der die Ventilöffnung umschließende Ventilsitz ausgebildet. Die hohlzylindrische Ventilnadel ist an ihrem einen Nadelende zum Kraftstoffeintritt offen und an ihrem anderen Nadelende durch ein kugelförmiges Ventilschließglied, das auf die Ventilnadel aufgeschweißt ist, verschlossen und ist mit radialen Austrittslöchern für den Kraftstoff versehen. Der Ventilsitzträger ist über ein Zwischenstück an dem hohlzylindrischen Magnetkern, z.B. durch Schweißung, befestigt. Dem hohlzylindrischen Magnetkern liegt unter Bildung eines Arbeitsluftspalts der Magnetanker gegenüber, der einstückig mit der Ventilnadel an dieser ausgebildet ist. Die Ventilnadel ist über ihren Magnetanker axial verschieblich im Zwischenstück geführt. Auf den Magnetkern ist dieA known injection valve for fuel injection systems for internal combustion engines (DE 42 30 376 Cl) has a valve seat carrier, in the end a valve seat body is used. On the valve seat body, the valve opening and the valve opening enclosing the valve seat is formed. The hollow cylindrical valve needle is open at its one end of the needle for fuel inlet and at its other end of the needle by a spherical valve closure member which is welded onto the valve needle, and is provided with radial outlet holes for the fuel. The valve seat carrier is connected via an intermediate piece to the hollow cylindrical magnetic core, e.g. by welding, attached. The hollow cylindrical magnetic core is opposite to the formation of a working air gap of the armature, which is formed integrally with the valve needle at this. The valve needle is guided via its armature axially displaceable in the intermediate piece. On the magnetic core is the
Magnetspule, bestehend aus einem Spulenkörper und einer in den Spulenkörper eingewickelten Erregerwicklung, aufgeschoben. Die Erregerwicklung ist an einen Anschlussstecker angeschlossen. Das vom Magnetanker abgekehrte Ende des Magnetkerns ist als Anschlussstutzen für die Kraftstoffeinleitung ausgebildet, in dem ein Kraftstofffilter eingesetzt ist. Die Magnetspule ist von einem, als Bügel ausgebildeten ferromagnetischen Leitelement umgeben, das mit seinem einen Ende an dem Magnetkern und seinem anderen Ende an dem Ventilsitzträger anliegt und mit diesem z. B. durch Schweißen oder Löten verbunden ist. Magnetkern, Magnetspule mit ferromagnetischem Leitelement und Ventilsitzträger sind von einer Kunststoffumspritzung umschlossen, in der der Anschlussstecker integriert ist. Die Ventilnadel ist in sog. MIM-Technologie (Metal Injection Molding) durch Spritzgießen und anschließendem Sintern hergestellt. Dabei wird die Ventilnadel aus einem Metallpulver mit einem Bindemittel, z.B. einem Kunststoffbindemittel gespritzt. Durch Sintern wird das Bindemittel wieder entfernt. Die so hergestellte hülsen- oder zylinderförmige Ventilnadel, in der schon die Austrittslöcher ausgeformt und der Magnetkern angeformt sind, wird stirnseitig mit dem kugelförmigen Ventilschließglied durch Schweißen verbunden.Magnetic coil, consisting of a bobbin and a wound into the bobbin field winding, pushed. The excitation winding is connected to a connector. The remote from the armature end of the magnetic core is formed as a connecting piece for the fuel introduction, in which a fuel filter is used. The magnetic coil is surrounded by a trained as a bracket ferromagnetic guide element, which abuts with its one end to the magnetic core and its other end to the valve seat carrier and with this z. B. is connected by welding or soldering. Magnetic core, magnetic coil with ferromagnetic guide element and valve seat carrier are enclosed by a plastic encapsulation, in which the connector is integrated. The Valve needle is manufactured in so-called. MIM technology (Metal Injection Molding) by injection molding and subsequent sintering. The valve needle is sprayed from a metal powder with a binder, such as a plastic binder. By sintering the binder is removed again. The sleeve or cylindrical valve needle produced in this way, in which the outlet holes have already been formed and the magnetic core formed, is connected to the spherical valve closure member by welding at the end face.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Einspritzventil mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass die Funktionen des Einspritzventils auf komplexe Bauteile vereinigt sind, die einerseits durch Spritztechniken, wie MIM (Metal Injection Molding), CIM (Ceramic Injection Molding) oder Kunststoffspritzgießen kostengünstig herstellbar sind und andererseits eine Straffung der Montagelinie mit Montagezeitgewinn ermöglichen. Die aufwändige und kostspieligeThe injection valve according to the invention with the features of claim 1 has the advantage that the functions of the injection valve are combined on complex components, on the one hand by injection techniques, such as MIM (Metal Injection Molding), CIM (Ceramic Injection Molding) or plastic injection molding can be produced inexpensively and on the other to streamline the assembly line with increased assembly time. The elaborate and expensive
Umspritzung des Einspritzventils mit Kunststoff innerhalb der Montagelinie wird umgangen. Durch das Verkleben der Bauteile an den Füge- und Dichtstelle - anstelle von Schweißen - wird ein Verzug der Bauteile vermieden und können Metall- und Kunststoffteile problemlos und zuverlässig miteinander verbunden werden.Overmolding of the injection valve with plastic within the assembly line is bypassed. By bonding the components to the joint and sealing point - instead of welding - a delay of the components is avoided and metal and plastic parts can be easily and reliably connected to each other.
Darüber hinaus lassen sich durch die erfindungsgemäße Modulbauweise auch für den Kunden wesentliche technische Eigenschaften des Einspritzventils verbessern. So wird das Ventilgeräusch reduziert, da der Ventilsitzträger ein massives Bauteil ist und Ventilsitz und Ventilnadelführung in ihm vereinigt sind. Der Magnetkreis lässt sich durch Wegfall von Tragfunktion für Magnetspule und Anschlussstutzen bezüglich seines Eisenvolumens so optimieren, dass induzierte Wirbelströme reduziert und Schaltzeiten verkürzt werden und damit der Dynamic Flow Range (DFR) verbessert wird.In addition, can be improved by the inventive modular design for the customer essential technical characteristics of the injector. Thus, the valve noise is reduced because the valve seat carrier is a solid component and valve seat and valve needle guide are united in it. The magnetic circuit can be optimized in terms of its iron volume by eliminating support function for solenoid coil and connecting piece so that induced eddy currents are reduced and switching times are shortened and thus the dynamic flow range (DFR) is improved.
Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Einspritzventils möglich.The measures listed in the further claims advantageous refinements and improvements of the claim 1 injection valve are possible.
Gemäß einer vorteilhaften Ausführungsform der Erfindung ist der hohlzylindrische Magnetkern in den Ventilsitzträger eingepresst. Aufgrund der Wandstärke des Ventilsitzträgers ist dabei eine reine Presspassung ausreichend für die Festigkeit der Verbindung, so dass der Magnetkern nicht noch zusätzlich am Ventilsitzträger festgeheftet werden muss. Die axiale Einsetztiefe des Magnetkerns legt den maximalen Hub der Ventilnadel fest.According to an advantageous embodiment of the invention, the hollow cylindrical magnetic core is pressed into the valve seat carrier. Due to the wall thickness of the valve seat carrier is doing a pure press fit sufficient for the strength of the connection, so that the magnetic core does not need to be additionally stapled to the valve seat carrier. The axial insertion depth of the magnetic core determines the maximum stroke of the valve needle.
Zeichnungdrawing
Die Erfindung ist anhand von in der Zeichnung dargestellten Ausfuhrungsbeispielen in der nachfolgenden Beschreibung näher erläutert. Es zeigen:The invention is explained in more detail in the following description with reference to exemplary embodiments illustrated in the drawing. Show it:
Fig. 1 einen Längsschnitt eines Einspritzventils,1 shows a longitudinal section of an injection valve,
Fig. 2 einen Längsschnitt eines Einspritzventils gemäß einem weiteren Ausfuhrungsbeispiel in einer Halbschnittdarstellung.Fig. 2 is a longitudinal section of an injection valve according to a further exemplary embodiment in a half-sectional view.
Beschreibung der AusfuhrungsbeispieleDescription of the exemplary embodiments
Das in Fig. 1 im Längsschnitt schematisiert dargestellte Einspritzventil wird vorzugsweise in Kraftstoffeinspritzanlagen von Brennkraftmaschinen in Kraftfahrzeugen eingesetzt. Es weist einen Ventilsitzträger 11, eine im Ventilsitzträger 11 koaxial angeordnete Ventilnadel 12, einen Elektromagneten 13 zum Betätigen der Ventilnadel 12, sowie einen Anschlussstutzen 14 zum Zufuhren von Kraftstoff auf . Der Ventilsitzträger 11 ist aus einem harten Magnetmaterial, z.B. KM57, oder einem partiell härtbaren Magnetmaterial als sog. MIM-Teil durch Spritzgießen und anschließendes Sintern nach dem Metal-Injection-Molding- Verfahren hergestellt. Einzelheiten dieses Verfahrens finden sich in der DE 42 30 376 Cl . Beim Herstellen des Ventilsitzträgers 11 wird in dessen Bodenbereich eine Ventilöffnung 15 und ein diese umschließender Ventilsitz 16 aus- bzw. angeformt. Der Ventilsitz 16 wird im endgültigen Zustand geschliffen bzw. gehont. Im Boden des Ventilsitzträgers 11 ist auf der vom Ventilsitz 16 abgekehrten Außenseite eine Ausnehmung 17 koaxial zur Ventilöffnung 15 eingeformt, in die eine Spritzlochscheibe 17 eingeklebt ist. An seinem vom Ventilsitz 16 abgekehrten Ende ist der Ventilsitzträger 11 mit einer außen umlaufenden Ringnut 18 versehen. Ist der Ventilsitzträger 11 nicht aus hartem, sondern partiell härtbarem Magnetmaterial hergestellt, so wird dieses im Bereich des Ventilsitzes 16 gehärtet. - A -The injector shown schematically in Fig. 1 in longitudinal section is preferably used in fuel injection systems of internal combustion engines in motor vehicles. It has a valve seat carrier 11, a valve needle 12 arranged coaxially in the valve seat carrier 11, an electromagnet 13 for actuating the valve needle 12, and a connecting piece 14 for supplying fuel. The valve seat carrier 11 is made of a hard magnetic material, such as KM57, or a partially curable magnetic material as a so-called. MIM part by injection molding and subsequent sintering by the metal injection molding process. Details of this process can be found in DE 42 30 376 Cl. When the valve seat carrier 11 is produced, a valve opening 15 and a valve seat 16 enclosing it are formed or formed in its bottom area. The valve seat 16 is ground or honed in the final state. In the bottom of the valve seat carrier 11, a recess 17 is formed coaxially with the valve opening 15 on the side facing away from the valve seat 16 outside, into which a spray-orifice plate 17 is glued. At its end remote from the valve seat 16 end of the valve seat carrier 11 is provided with an outer circumferential annular groove 18. If the valve seat carrier 11 is not made of hard, but partially curable magnetic material, this is hardened in the region of the valve seat 16. - A -
Die im Ausführungsbeispiel der Fig. 1 hohlzylindrische Ventilnadel 12 ist an ihrem vom Ventilsitz 16 abgekehrten Ende zum Kraftstoffeintritt offen und trägt an ihrem dem Ventilsitz 16 zugekehrten anderen Ende ein Ventilschließglied 19, das mit dem Ventilsitz 16 zum Freigeben und Schließen der Ventilöffnung 15 zusammenwirkt. Zum Kraftstoffaustritt ist die Ventilnadel 12 mit mindestens einem radial durch die Zylinderwand hindurchgehenden Austrittsloch 20 versehen. An dem vom Ventilschließglied 19 abgekehrten Ende der Ventilnadel 12 ist ein Magnetanker 21 angeordnet, über den die Ventilnadel 12 in dem Ventilsitzträger 11 axial verschieblich geführt ist. Die Ventilnadel 12 mit Ventilschließglied 19 und Magnetanker 21 ist als einstückiges MIM-Teil aus einem harten, weichmagnetischen Material hergestellt. Durch die MIM-Technologie können sowohl die Austrittslöcher 20 als auch eine innen am Ventilschließglied 19 ausgerichtete ebene Fläche 22 hergestellt werden. Diese ebene Fläche 22 dient als Reflexionsfläche für einen Laserstrahl bei der Trockeneinstellung des Ventilhubs. Die mit dem Ventilsitz 16 zusammenwirkende Außenkontur des Ventilschließglieds 19 wird angeschliffen, wobei beliebige Konturen, z.B. Kugelform oder Kantensitz mit Dämpfungskegel, realisiert werden können.The hollow cylindrical valve needle 12 in the embodiment of Fig. 1 is open at its end facing away from the valve seat 16 for fuel inlet and carries at its valve seat 16 facing the other end a valve closure member 19 which cooperates with the valve seat 16 for releasing and closing the valve opening 15. For fuel outlet, the valve needle 12 is provided with at least one radially passing through the cylinder wall outlet hole 20. At the end remote from the valve closing member 19 end of the valve needle 12, a magnet armature 21 is arranged, via which the valve needle 12 is guided axially displaceably in the valve seat carrier 11. The valve needle 12 with valve closure member 19 and armature 21 is made as a one-piece MIM part of a hard, soft magnetic material. Through the MIM technology, both the exit holes 20 and a flat on the valve closing member 19 aligned flat surface 22 can be prepared. This flat surface 22 serves as a reflection surface for a laser beam in the dry adjustment of the valve lift. The outer contour of the valve closure member 19 cooperating with the valve seat 16 is ground, with any contours, e.g. Ball shape or edge seat with damping cone, can be realized.
Der Elektromagnet 13 umfasst neben dem mit der Ventilnadel 12 einstückig ausgebildeten Magnetanker 21 einen innenliegenden, hohlzylindrischen Magnetkern 23, einen außenliegenden, tiefgezogenen Magnettopf 24 und eine zwischen Magnetkern 23 und Magnettopf 24 einliegende Magnetspule 25, die in bekannter Weise aus einer auf einen Spulenkörper aufgewickelten Erregerwicklung besteht. Die Magnetspule 25 ist an einem Anschlussstecker 26 angeschlossen. Der hohlzylindrische Magnetkern 23 ist an dem vom Ventilsitz 16 abgekehrten Ende des Ventilsitzträgers 11 in diesen eingepresst. Seine Einpresstiefe bestimmt den Hub der Ventilnadel 12. Aufgrund der relativ großen Wandstärke des Ventilsitzträgers 11 wird durch eine reine Presspassung eine ausreichende Festigkeit in derThe electromagnet 13 comprises, in addition to the integrally formed with the valve needle 12 magnet armature 21 an inner, hollow cylindrical magnetic core 23, an outer, deep-drawn magnet pot 24 and a magnetic core 23 and magnetic pot 24 inset magnetic coil 25, in a known manner from a wound on a bobbin exciter winding consists. The magnetic coil 25 is connected to a connector 26. The hollow cylindrical magnetic core 23 is pressed against the valve seat 16 remote from the end of the valve seat support 11 in this. Its Einpresstiefe determines the stroke of the valve needle 12. Due to the relatively large wall thickness of the valve seat carrier 11 is a pure press fit sufficient strength in the
Verbindung von Magnetkern 23 und Ventilsitzträger 11 erreicht. Die Magnetspule 25 und der Anschlussstecker 26 sind zu einem kunststoffumspritzten Spulenteil 27 zusammengefasst, das als separates Bauteil außerhalb der Montagelinie hergestellt, angeliefert und auf den Ventilsitzträger 11 aufgeschoben wird. Auf das kunststoffumspritzte Spulenteil 27 wird der Magnettopf 24 aufgesetzt, der mit seinem Topfboden 241 den Ventilsitzträger 11 umschließt und mit seinem Topfmantel 242 am Topföffnungsrand einen am Ventilsitzträger 11 angeformten Radialflansch 111 nahezu spiellos übergreift. Der Radialflansch 11 ist in Höhe des Magnetkerns 23 an der Ventilnadel 12 angeordnet. Die Ventilnadel 12 wird mit ihrem Ventilschließglied 19 durch eine als Druckfeder ausgebildete Ventilschließfeder 28 auf den Ventilsitz 16 aufgepresst. Hierzu stützt sich die Ventilschließfeder 28 einerseits in einer im Innern der Ventilnadel 12 ausgebildeten, radialen Ringschulter 121 und andererseits an einer Einstellhülse 29 ab, die in den Magnetkern 23 eingepresst ist. Die Einpresstiefe der Einstellhülse 29 bestimmt die Federvorspannung der Ventilschließfeder 28 und damit die Schließkraft der Ventilnadel 12. Bei geschlossenem Ventil ist zwischen den ringförmigen Stirnflächen von Magnetanker 21 und Magnetkern 23 ein Arbeitsluftspalt 30 vorhanden.Connection of magnetic core 23 and valve seat carrier 11 is achieved. The magnet coil 25 and the connector 26 are combined to form a plastic-encased coil part 27, which is manufactured as a separate component outside the assembly line, delivered and pushed onto the valve seat carrier 11. On the plastic-coated coil part 27 of the magnet pot 24 is placed, which surrounds the valve seat carrier 11 with its cup bottom 241 and with its cup jacket 242 at the pot opening edge integrally formed on a valve seat carrier 11 radial flange 111 almost without play. The radial flange 11 is arranged at the level of the magnetic core 23 on the valve needle 12. The valve needle 12 is connected to its valve closing member 19 by a trained as a compression spring valve closing spring 28 on the Valve seat 16 pressed on. For this purpose, the valve closing spring 28 is supported on the one hand in a radial annular shoulder 121 formed in the interior of the valve needle 12 and on the other hand on an adjusting sleeve 29, which is pressed into the magnetic core 23. The offset of the adjusting sleeve 29 determines the spring bias of the valve closing spring 28 and thus the closing force of the valve needle 12. When the valve is closed between the annular end faces of armature 21 and magnetic core 23, a working air gap 30 is present.
Der Anschlussstutzen 14 ist als separates Kunststoffspritzgussteil mit integriertem Filter 31 hergestellt. Er weist einerseits einen Ringsteg 141, der mit der Ringnut 18 am Ventilsitzträger 11 eine Klipsverbindung herzustellen vermag, und eine radial abstehende Montagenase 142 auf, die als Verdrehsicherung dient und zum lagerichtigen Einsetzen des Einspritzventils in eine Kraftstoffsammelleitung dient. Die Montagenase 142 kann dabei je nach Bautyp des Einspritzventils in Axial- und Radialrichtung am Anschlussstutzen 14 versetzt sein. Der Anschlussstutzen 14 wird am Ende der Montagelinie gerichtet zur Spritzlochscheibe 17 auf den Ventilsitzträger 11 aufgeklipst und mit dem Ventilsitzträger 11 und/oder dem Magnettopf 24 verklebt.The connecting piece 14 is made as a separate plastic injection molded part with integrated filter 31. On the one hand, it has an annular web 141, which is able to produce a clip connection with the annular groove 18 on the valve seat carrier 11, and a radially projecting mounting nose 142, which serves as an anti-rotation device and serves for the correct insertion of the injection valve into a fuel manifold. The mounting nose 142 may be offset depending on the type of injection valve in the axial and radial directions on the connecting piece 14. The connecting piece 14 is at the end of the assembly line directed to the spray perforated disk 17 clipped onto the valve seat carrier 11 and bonded to the valve seat carrier 11 and / or the magnet pot 24.
Das Volumen des von Magnetkern 23, Magnettopf 24, Radialflansch 111 und Magnetanker 21 gebildeten Magnetkreises ist minimiert, wozu einerseits die Wandstärken der genannten Bauteile möglichst gering ausgeführt und andererseits der Magnetkreis rechteckig ausgebildet ist.The volume of the magnetic circuit formed by the magnetic core 23, magnet pot 24, radial flange 111 and armature 21 is minimized, on the one hand the wall thicknesses of said components as low as possible and on the other hand, the magnetic circuit is rectangular.
Das in Fig. 2 schematisiert im Halbschnitt dargestellte Einspritzventil ist gegenüber dem zuvor beschriebenen Einspritzventil bezüglich des Ventilsitzträgers 11 und der Ventilnadel 12 modifiziert. Ventilsitzträger 11 und Ventilnadel 12 sind nicht aus weichmagnetischem Material, sondern aus einem harten Material in MIM-Technologie hergestellt. Die Ventilnadel 12 kann aber auch nach einem sog. CIM- Verfahren (Ceramic-Injection-Molding) hergestellt werden. Der Magentanker 21 ist hier nicht einstückig an die Ventilnadel 12 angeformt, sondern als separater weichmagnetischer Ring 32 durch Pressen, Schweißen oder Formschluss auf der Ventilnadel 12 befestigt. Der Ventilsitzträger 11 ist in seinem von dem Elektromagneten 13 umfassten Bereich dünnwandig ausgebildet, so dass sich infolge der Abstufung der Wanddicke eine außen am Ventilsitzträger 11 umlaufende Ringschulter 112 ergibt. Der Magnetkern 23 ist in den dünnwandigen Bereich des Ventilsitzträgers 11 eingepresst und mit diesem verschweißt. Das kunststoffumspritzte Spulenteil 27 ist auf den Magnetkern 23 und den dünnwandigen Bereich des Ventilsitzträgers 11 aufgeschoben und vorzugsweise mit beiden verklebt. Der tiefgezogene Magnettopf 24 ist mit seinem Topfboden 241 auf den Magnetkern 23 aufgesetzt und mit diesem vorzugsweise durch Schweißen verbunden. Die ringförmige Topföffnung ist von einem Ring 33 aus weichmagnetischem Material abgedeckt, der an der Ringschulter 112 des Ventilsitzträgers 11 anliegt und mit seinem Innrand mit dem Ventilsitzträger 11 und mit seinem Außenrand mit dem Topfmantel 242 des Magnettopfes 24 formschlüssig verbunden ist, z.B. durch Pressung oder Schweißung.The injection valve shown schematically in half section in FIG. 2 is modified with respect to the valve seat carrier 11 and the valve needle 12 with respect to the previously described injection valve. Valve seat carrier 11 and valve needle 12 are not made of soft magnetic material, but made of a hard material in MIM technology. However, the valve needle 12 can also be produced by a so-called CIM process (Ceramic Injection Molding). The gas tanker 21 is not integrally formed on the valve needle 12, but attached as a separate soft magnetic ring 32 by pressing, welding or positive engagement on the valve needle 12. The valve seat carrier 11 is designed to be thin-walled in its area encompassed by the electromagnet 13, so that as a result of the gradation of the wall thickness, an annular shoulder 112 running around the outside of the valve seat carrier 11 results. The magnetic core 23 is pressed into the thin-walled region of the valve seat carrier 11 and welded thereto. The plastic-molded coil part 27 is on the magnetic core 23 and the thin-walled Area of the valve seat carrier 11 is pushed and preferably glued to both. The deep-drawn magnet pot 24 is placed with its cup bottom 241 on the magnetic core 23 and connected thereto preferably by welding. The annular pot opening is covered by a ring 33 of soft magnetic material, which rests against the annular shoulder 112 of the valve seat carrier 11 and is positively connected with its Innrand with the valve seat carrier 11 and with its outer edge with the pot shell 242 of the magnetic pot 24, for example by pressing or welding ,
In einer hier nicht dargestellten alternativen Ausführungsform kann die Ventilnadel auch als massiver Stößel ausgeführt werden, an dessen einem Ende das vorzugsweise kugelförmige Ventilschließglied angeschweißt und an dessen anderem Ende der Magnetanker angeordnet, vorzugsweise einstückig angeformt ist, der gleichzeitig zur Axialführung der Ventilnadel im Ventilsitzträger 11 dient. Eine solche Ventilnadel ist beispielsweise aus der DE 44 15 850 Al bekannt. In an alternative embodiment not shown here, the valve needle can also be designed as a solid plunger welded to one end of the preferably spherical valve closure member and arranged at the other end of the armature, preferably integrally formed, which also serves for axial guidance of the valve needle in the valve seat carrier 11 , Such a valve needle is known for example from DE 44 15 850 Al.

Claims

Ansprüche claims
1. Einspritzventil, insbesondere für Kraftstoffeinspritzanlangen von Brennkraftmaschinen in Kraftfahrzeugen, mit einem Ventilsitzträger (11), mit einem am Ende des Ventilsitzträgers1. injection valve, in particular for Kraftstoffeinspritzanlangen of internal combustion engines in motor vehicles, with a valve seat carrier (11), with a at the end of the valve seat carrier
(11) sich befindlichen, eine Ventilöffnung (15) umschließenden Ventilsitz (16), mit einer im Ventilsitzträger (11) koaxial angeordneten, axial verschieblich geführten Ventilnadel (12), die an ihrem dem Ventilsitz (16) zugekehrten Nadelende eine mit dem Ventilsitz (16) zum Schließen und Freigeben der Ventilöffnung (15) zusammenwirkendes Ventilschließglied (19) trägt, mit einem Elektromagneten (13) zur Hubbetätigung der Ventilnadel (12), der einen inneren, hohlzylindrischen Magnetkern (23), einen äußeren Magnettopf (24), eine dazwischenliegende, an einem Anschlussstecker (26) angeschlossene Magnetspule (25) und einen dem Magnetkern (23) axial gegenüberliegenden Magnetanker (21) aufweist, der an dem vom Ventilschließglied (19) abgekehrten Nadelende der Ventilnadel (12) angeordnet ist, und mit einem Anschlussstutzen (14) mit Filter (31) zum Einleiten des Kraftstoffs, dadurch gekennzeichnet, dass Ventilöffnung (15) und Ventilsitz (16) am einteiligen Ventilsitzträger (11) selbst ausgebildet sind, dass die axial verschiebliche Führung der Ventilnadel (12) dem Ventilsitzträger (11) zugewiesen ist, dass Magnetspule (25) und Anschlussstecker (26) in einem kunststoffumspritzten separaten Spulenteil (27) zusammengefasst sind, das auf den Ventilsitzträger (11) aufgesetzt ist, dass der Magnettopf (24) auf das Spulenteil (27) so aufgesetzt ist, dass der Magnetkreis über Magnetkern (23), Magnettopf (24), Ventilsitzträger (11) und Magnetanker (21) geschlossen ist, dass der Anschlussstutzen (14) als separates Kunststoffspritzteil ausgebildet ist, in dem der Filter (31) integriert ist, und dass Füge- und Dichtungsstellen zwischen Anschlussstutzen (14) einerseits und Spulenteil (27), Magnettopf (24) und/oder Ventilsitzträger (11) andererseits geklebt sind.(11) located, a valve opening (15) enclosing the valve seat (16) with a valve seat carrier (11) coaxially arranged axially displaceably guided valve needle (12) at its the valve seat (16) facing the needle end with a valve seat ( 16) for closing and releasing the valve opening (15) cooperating valve closing member (19) carries, with an electromagnet (13) for lifting the valve needle (12) having an inner, hollow cylindrical magnetic core (23), an outer magnet pot (24), a intermediate, on a connector (26) connected to the magnet coil (25) and a magnet core (23) axially opposite armature (21) which is arranged on the valve closing member (19) facing away from the needle end of the valve needle (12), and with a connecting piece (14) with filter (31) for introducing the fuel, characterized in that the valve opening (15) and valve seat (16) on the one-piece valve seat carrier (11) selb are formed, that the axially displaceable guide of the valve needle (12) is assigned to the valve seat carrier (11) that magnetic coil (25) and connector (26) are combined in a plastic-molded separate coil part (27) which on the valve seat carrier (11) is mounted, that the magnet pot (24) is placed on the coil part (27) so that the magnetic circuit via magnetic core (23), magnet pot (24), valve seat carrier (11) and magnet armature (21) is closed, that the connecting piece (14 ) is formed as a separate plastic injection-molded part, in which the filter (31) is integrated, and that joining and sealing points between the connecting piece (14) on the one hand and coil part (27), magnet pot (24) and / or valve seat carrier (11) are glued on the other.
2. Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, dass der hohlzylindrische Magnetkern (23) in den Ventilsitzträger (11) eingepresst ist. 2. Injection valve according to claim 1, characterized in that the hollow cylindrical magnetic core (23) in the valve seat carrier (11) is pressed.
3. Einspritzventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Ventilsitzträger (11) mit Ventilöfmung (15) und Ventilsitz (16) als MIM-Teil hergestellt und der Ventilsitz (16) geschliffen oder gehont ist.3. Injection valve according to claim 1 or 2, characterized in that the valve seat carrier (11) with Ventilöfmung (15) and valve seat (16) made as a MIM part and the valve seat (16) is ground or honed.
4. Einspritzventil nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, dass die Ventilnadel (12) mit Ventilschließkopf (19) als einstückiges MIM- oder CIM-Teil hergestellt und die mit dem Ventilsitz (16) zusammenwirkende Außenkontur des Ventilschließkopfs (19) angeschliffen ist.4. Injection valve according to one of claims 1 - 3, characterized in that the valve needle (12) with valve closing head (19) made as a one-piece MIM or CIM part and with the valve seat (16) co-operating outer contour of the valve closing head (19) ground is.
5. Einspritzventil nach Anspruch 4, dadurch gekennzeichnet, dass die Ventilnadel (12) hohlzylindrisch mit einem offenen Ende für den Kraftstoffeintritt und mit radialen Austrittslöchern (20) für den Kraftstoffaustritt ausgebildet ist.5. An injector according to claim 4, characterized in that the valve needle (12) is formed as a hollow cylinder with an open end for the fuel inlet and with radial outlet holes (20) for the fuel outlet.
6. Einspritzventil nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, dass an dem Anschlussstutzen (14) eine der Verdrehsicherung dienende, radial abstehende Montagenase6. Injection valve according to one of claims 1-5, characterized in that on the connecting piece (14) serving for securing against rotation, radially projecting mounting nose
(142) zum lagerichtigen Positionieren des Einspritzventils in einer Kraftstoffsammeischiene angespritzt ist.(142) is injection-molded for the correct position of the injection valve in a Kraftstoffsammeischiene.
7. Einspritzventil nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, dass in dem Ventilsitzträger (11) eine die Ventilöffnung (15) stromabwärts des Kraftstoffflusses überdeckende Spritzlochscheibe (17) eingeklebt ist.7. Injection valve according to one of claims 1-6, characterized in that in the valve seat carrier (11) a valve opening (15) downstream of the fuel flow overlapping spray perforated plate (17) is glued.
8. Einspritzventil nach einem der Ansprüche 1 - 7, dadurch gekennzeichnet, dass das Volumen des von Magnetkern (23), Magnettopf (24), Ventilsitzträger (11) und Magnetanker (21) gebildeten Magnetkreises minimiert und der Magnetkreis vorzugsweise rechteckig ausgebildet ist.8. Injection valve according to one of claims 1-7, characterized in that the volume of the magnetic core (23), magnet pot (24), valve seat carrier (11) and magnet armature (21) formed magnetic circuit minimized and the magnetic circuit is preferably rectangular.
9. Einspritzventil nach einem der Ansprüche 4 - 8, dadurch gekennzeichnet, dass der Ventilsitzträger (11) aus weichmagnetischem Material, das hart oder im Ventilsitzbereich härtbar ist, und die Ventilnadel (12) aus weichmagnetischem, hartem oder bereichsweise härtbarem Material besteht und dass der Magnetanker (21) einstückig an die Ventilnadel (12) angeformt ist. 9. Injection valve according to one of claims 4-8, characterized in that the valve seat carrier (11) made of soft magnetic material which is hard or curable in the valve seat region, and the valve needle (12) made of soft magnetic, hard or partially curable material and that of Magnetic armature (21) is integrally formed on the valve needle (12).
10. Einspritzventil nach Anspruch 9, dadurch gekennzeichnet, dass der vorzugsweise tief gezogene Magnettopf (24) mit seinem Topfboden (241) auf den Ventilsitzträger (11) aufgeschoben ist und an seiner Topföffnung mit seinem Topfmantel (242) einen Radialflansch (111) vorzugsweise spiellos übergreift, der am Ventilsitzträger (11) in Höhe des Magnetankers (21) einstückig angeformt ist.10. An injection valve according to claim 9, characterized in that the preferably deep-drawn magnet pot (24) with its cup bottom (241) on the valve seat carrier (11) is pushed and at its pot opening with his Topfmantel (242) a radial flange (111) preferably without play engages, which is integrally formed on the valve seat carrier (11) in the amount of the armature (21).
11. Einspritzventil nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass der Ventilsitzträger (11) auf seinem vom Ventilsitz (16) abgekehrten Endabschnitt eine Ringnut (18) aufweist, in die der Anschlussstutzen (14) mit einem Ringsteg (141) zur Herstellung einer Klipsverbindung einklipsbar ist.11. Injection valve according to claim 9 or 10, characterized in that the valve seat carrier (11) on its from the valve seat (16) facing away from the end portion has an annular groove (18) into which the connecting piece (14) with an annular web (141) for producing a Clip connection is clipped.
12. Einspritzventil nach einem der Ansprüche 4 - 8, dadurch gekennzeichnet, dass Ventilsitzträger (11) und Ventilnadel (12) aus hartem Material bestehen und der Magnetanker (21) als Ring (32) aus weichmagnetischem Material durch Pressung, Schweißen oder Formschluss an der Ventilnadel (12) befestigt ist.12. Injection valve according to one of claims 4-8, characterized in that the valve seat carrier (11) and valve needle (12) made of hard material and the armature (21) as a ring (32) made of soft magnetic material by pressing, welding or positive connection to the Valve needle (12) is attached.
13. Einspritzventil nach Anspruch 12, dadurch gekennzeichnet, dass der vorzugsweise tiefgezogene Magnettopf (24) mit seinem Topfboden (241) auf den Magnetkern (23) aufgeschoben ist und dass die ringförmige Topföffnung des Magnettopfes (24) mit einem Ring (33) aus weichmagnetischem Material überdeckt ist, der außen mit dem Topfmantel (242) des Magnettopfes (24) und innen mit dem Ventilsitzträger (11) in Höhe des Magnetankers (21) formschlüssig verbunden ist.13. Injection valve according to claim 12, characterized in that the preferably deep-drawn magnet pot (24) with its cup bottom (241) on the magnetic core (23) is pushed and that the annular pot opening of the magnet pot (24) with a ring (33) made of soft magnetic Covered material is externally connected to the pot shell (242) of the magnet pot (24) and inside with the valve seat carrier (11) in the amount of magnet armature (21) positively.
14. Einspritzventil nach Anspruch 13, dadurch gekennzeichnet, dass der Ventilsitzträger (11) in seinem vom Elektromagneten (13) umfassten Bereich dünnwandig ausgebildet ist, dass der weichmagnetische Ring (32) an einer durch die Abstufung der Wanddicke des Ventilsitzträgers (11) sich ergebenden Ringschulter (112) axial anliegt und dass der in den dünnwandigen Bereich des Ventilsitzträgers (11) eingepresste Magnetkern (23) am Ventilsitzträger (11) angeschweißt ist.14, injection valve according to claim 13, characterized in that the valve seat carrier (11) in its electromagnet (13) encompassed area is thin-walled, that the soft magnetic ring (32) at a by the gradation of the wall thickness of the valve seat carrier (11) resulting Ring shoulder (112) abuts axially and that in the thin-walled region of the valve seat carrier (11) pressed-in magnetic core (23) on the valve seat carrier (11) is welded.
15. Einspritzventil nach einem der Ansprüche 12 - 14, dadurch gekennzeichnet, dass der Anschlussstutzen (14) auf den Magnetkern (23), diesen randseitig übergreifend aufgesetzt und mit dem Magnetkern (23) und/oder mit dem Magnettopf (24) verklebt ist. 15. Injection valve according to one of claims 12 - 14, characterized in that the connecting piece (14) on the magnetic core (23), this edge over-mounted and bonded to the magnetic core (23) and / or with the magnet pot (24).
EP05801390A 2004-12-07 2005-10-05 Injection valve Not-in-force EP1825136B1 (en)

Applications Claiming Priority (2)

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DE102004058803A DE102004058803A1 (en) 2004-12-07 2004-12-07 Injector
PCT/EP2005/055005 WO2006061268A1 (en) 2004-12-07 2005-10-05 Injection valve

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EP1825136A1 true EP1825136A1 (en) 2007-08-29
EP1825136B1 EP1825136B1 (en) 2008-07-23

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EP (1) EP1825136B1 (en)
JP (1) JP4571984B2 (en)
CN (1) CN101072942B (en)
DE (2) DE102004058803A1 (en)
WO (1) WO2006061268A1 (en)

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US7963465B2 (en) 2011-06-21
JP4571984B2 (en) 2010-10-27
CN101072942A (en) 2007-11-14
US20080265065A1 (en) 2008-10-30
DE502005004843D1 (en) 2008-09-04
EP1825136B1 (en) 2008-07-23
DE102004058803A1 (en) 2006-06-08
CN101072942B (en) 2010-06-16
WO2006061268A1 (en) 2006-06-15
JP2008523287A (en) 2008-07-03

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