WO2015039949A1 - Electromagnetically actuated suction valve - Google Patents

Electromagnetically actuated suction valve Download PDF

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Publication number
WO2015039949A1
WO2015039949A1 PCT/EP2014/069394 EP2014069394W WO2015039949A1 WO 2015039949 A1 WO2015039949 A1 WO 2015039949A1 EP 2014069394 W EP2014069394 W EP 2014069394W WO 2015039949 A1 WO2015039949 A1 WO 2015039949A1
Authority
WO
WIPO (PCT)
Prior art keywords
suction valve
plug
pressure pump
valve according
magnetic
Prior art date
Application number
PCT/EP2014/069394
Other languages
German (de)
French (fr)
Inventor
Achim Meisiek
Stefan Kolb
Michael IMHOF
Tobias Landenberger
Hans Heber
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 WO2015039949A1 publication Critical patent/WO2015039949A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • F02M59/368—Pump inlet valves being closed when actuated
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric 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
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit

Definitions

  • the invention relates to an electromagnetically controllable suction valve for a high-pressure pump of a fuel injection system, in particular of a common rail injection system, having the features of the preamble of claim 1. Furthermore, the invention relates to a high pressure pump with such a suction valve.
  • An electromagnetically controllable intake or intake valve for a high-pressure pump in particular a radial or in-line piston pump for fuel injection systems, is shown by way of example from the published patent application DE 10 2010 027 745 A1.
  • the inlet valve is arranged in a recess of a housing part of the high-pressure pump designed as a cylinder head and is fixed in position by means of a screw plug screwed into the cylinder head. It comprises a valve body and a valve tappet, which cooperates with a valve seat formed on the valve body forming a sealing seat.
  • a valve spring acts on the valve tappet against the valve seat surface.
  • the inlet valve comprises an armature formed as a plunger armature, which is connected to the valve stem, and a magnet with a magnetic coil to generate a magnetic field acting on the armature when the solenoid is energized.
  • the solenoid is electrically connected via electrically conductive pins with the pins of a plug.
  • the present invention seeks to provide an electromagnetically controllable suction valve for a high-pressure pump, including the components for electrically contacting a magnetic coil of a Simply mount the magnetic actuator and insert it into a housing bore of a high-pressure pump.
  • the electromagnetically controllable suction valve with the features of claim 1 is proposed.
  • Advantageous developments of the invention are specified in the subclaims.
  • a high pressure pump is proposed with such a suction valve.
  • the electromagnetically controllable intake valve proposed for a high-pressure pump of a fuel injection system comprises a valve closing element which is received in a liftable manner in a bore of a valve body and acted upon directly or indirectly in the closing direction by the spring force of a spring, as well as one with a magnetic coil a magnetic actuator cooperating liftable armature, which is coupled to control the lifting movement of the valve closing element with this.
  • the suction valve comprises a plug for electrically contacting the magnetic coil of the magnetic actuator and a screw plug, by means of which the suction valve is fixed in position in a housing bore of the high-pressure pump.
  • the plug has a plastic encapsulation, which is connected via a press fit with the screw plug.
  • the plug and the encapsulation in the present case form a structural unit which can be connected to the suction valve in a simple manner by pressing into the screw plug. This reduces the effort during assembly of the suction valve.
  • the press fit allows the installation of the assembly of plug and encapsulation in any angular position, so that the assembly can be made according to the respective mounting situation.
  • an annular body preferably a metallic annular body, is preferably integrated into the plastic encapsulation.
  • the ring body serves as a support body and causes a certain stiffness of plastic encapsulation, which the installation position of the assembly of plug and
  • the annular body is arranged on the outer peripheral side in the plastic encapsulation and lies directly against the closure screw. This means that the ring body is not completely covered by the material of the
  • Encapsulation is surrounded, but has a standing in contact with the screw outer peripheral surface, via which a press connection with the screw plug can be produced.
  • At least one pin and / or contact pin for electrical contacting of the magnetic coil is integrated into the plastic encapsulation.
  • the assembly of plug and encapsulation therefore comprises at least one pin and / or pin, whereby the assembly cost is further reduced.
  • the plug is connected to the magnet actuator by means of the plastic encapsulation, so that the plug, the plastic
  • Encapsulation and the magnetic actuator form a structural unit.
  • at least one pin and / or contact pin can also be integrated into the encapsulation.
  • the encapsulation is preferably carried out separately with the components plug, magnetic coil and any contact elements. As a result, the assembly work on the Saugventilmontageline is significantly reduced. If necessary, assemblies can be procured from the external procurement.
  • the plug is arranged in an outer peripheral area of the plastic encapsulation.
  • the plug is therefore positioned radially.
  • the press connection of the plastic encapsulation connected to the plug with the closure screw allows an angular position of the plug corresponding to the respective connection situation, so that the greatest possible flexibility with respect to the electrical connection is provided. Because in the press-in area the plastic extrusion is rotationally symmetrical in order to produce the press connection with the screw plug.
  • the magnetic actuator comprises a magnetic core with an annular recess for receiving the magnetic coil.
  • the magnetic core may also be part of the assembly consisting of plug, magnetic coil and plastic encapsulation and any contact elements, whereby the assembly effort is further reduced.
  • the magnetic core - as an alternative or in addition to the ring body - can be used as a support body.
  • the closure screw on a radially extending annular shoulder for supporting the Magnetaktors in the axial direction.
  • the axial mounting position of the plastic extrusion coating including the plug and / or the magnetic coil can be fixed.
  • a high-pressure pump is proposed with a suction valve according to the invention for connecting a pump working space of the high-pressure pump with a fuel inlet.
  • the suction valve is inserted into a housing bore of the high pressure pump and fixed in position by means of the screw plug.
  • Magnet actuator forms a unit with the plug and the encapsulation or form, the assembly can be further simplified and accelerated.
  • a preferred embodiment of the invention will be described below with reference to the accompanying drawings. This shows a schematic longitudinal section through an inventive suction valve. Detailed description of the drawing
  • controllable suction valve is inserted into a housing bore 10 of a high-pressure pump and serves to connect a pump working chamber 19 with a fuel inlet 20, so that in the suction operation of the high-pressure pump, the pump working chamber 19 via the suction valve with fuel can be filled.
  • the suction valve comprises a plate-shaped valve body 3 with an axially guided bore 2, in which a valve closing element 1 is received in a liftable manner, which opens into the pump working chamber 19. In the closing direction, the valve closing element 1 is acted upon by the spring force of a spring 4.
  • valve body 3 In the bore 2 of the valve body 3 open radial bores 23, which are in hydraulic communication with the fuel inlet 20. At the level of the radial bores 23, the valve body 3 is surrounded by a sieve element 24 in order to prevent any particles contained in the fuel from entering the suction valve.
  • the valve body 3 is supported via a sealing washer 25 on a shoulder of the housing bore 10 in order to seal the pump working chamber 19 with respect to the fuel inlet 20.
  • An axial contact force is effected via a screw plug 9, which is screwed into the housing bore 10 and supported on the valve body 3.
  • the actuator is included, comprising a magnetic actuator 6 with a magnetic coil 5 and an interacting with the magnetic coil 5 anchor 7.
  • a magnetic field is generated, which moves the armature 7 against the spring force of a spring 22 in the direction of the magnetic coil 5.
  • the magnetic coil 5 is embedded in an annular recess 17 of a magnetic core 16, which is part of the magnetic circuit. Between the magnetic core 16 and the armature 7, a residual air gap disc 21 is arranged, which as Stroke serves.
  • the magnetic core 16 is supported on a radially extending annular shoulder 18 of the housing bore 10.
  • the magnetic coil 5 elements for electrical contacting tion are provided, which in the present case comprise a connected to the magnetic coil 5 pin 15 and a pin 14, which in turn is part of a plug 8.
  • the plug 8, the pin 14 and the contact pin 15 are connected via a plastic encapsulation 1 1, in the outer peripheral side, a metallic annular body 13 for producing a press fit 12 is integrated within the screw plug 9. This means that the plastic encapsulation 1 1 is pressed into the screw plug 9.
  • the plastic encapsulation 1 1 with the plug 8, the pin 14, the contact pin 15 and the solenoid actuator 6 forms a structural unit which facilitates the insertion of the actuator into the locking screw 9, since the structural unit is inserted as a whole in the locking screw 9 ,
  • the radially extending annular shoulder 18 of the housing bore 10 determines the axial position of the assembly, while the angular position is freely selectable due to the rotational symmetry in the press-fit.
  • the plug 8, which protrudes radially from the encapsulation 1 1, can therefore be arbitrarily oriented.
  • Modifications of the invention are possible by the pressed-in the screw 9 assembly is reduced to a connector 8 with a plastic encapsulation 1 1 and any contact elements in the form of a pin 14 and / or a contact pin 15.
  • the magnetic coil 5 with or without magnetic core 16 may be part of the structural unit.

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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

The invention relates to an electromagnetically actuated suction valve for a high-pressure pump of a fuel injection system, in particular of a common rail injection system, comprising a valve-closing element (1) which is held in a reciprocally movable fashion in a bore (2) of a valve body (3) and is acted on directly or indirectly by the spring force of a spring (4) in the closing direction, and a reciprocally movable armature (7) which interacts with a solenoid (5) of a magnet actuator (6) and can be coupled to the valve-closing element (1) in order to control the reciprocating movement thereof, also comprising a plug (8) for making electrical contact with the solenoid (5) of the magnet actuator (6) as well as a closure screw (9) by means of which the suction valve can be fixed in position in a housing bore (10) in the high-pressure pump. According to the invention, the plug (8) has a plastic encapsulation (11) which is connected to the closure screw (9) via a press fit (12). The invention also relates to a high-pressure pump having such a suction valve

Description

Beschreibung Titel:  Description Title:
Elektromagnetisch ansteuerbares Saugventil  Electromagnetically controllable suction valve
Die Erfindung betrifft ein elektromagnetisch ansteuerbares Saugventil für eine Hochdruckpumpe eines Kraftstoffeinspritzsystems, insbesondere eines Com- mon-Rail-Einspritzsystems, mit den Merkmalen des Oberbegriffs des Anspruchs 1 . Ferner betrifft die Erfindung eine Hochdruckpumpe mit einem solchen Saugventil. The invention relates to an electromagnetically controllable suction valve for a high-pressure pump of a fuel injection system, in particular of a common rail injection system, having the features of the preamble of claim 1. Furthermore, the invention relates to a high pressure pump with such a suction valve.
Stand der Technik State of the art
Ein elektromagnetisch ansteuerbares Saug- bzw. Einlassventil für eine Hochdruckpumpe, insbesondere eine Radial- oder Reihenkolbenpumpe für Brennstoffeinspritzanlagen, geht beispielhaft aus der Offenlegungsschrift DE 10 2010 027 745 A1 hervor. Das Einlassventil ist in einer Ausnehmung eines als Zylinderkopf ausgebildeten Gehäuseteils der Hochdruckpumpe angeordnet und mittels einer in den Zylinderkopf eingeschraubten Verschlussschraube lagefixiert. Es umfasst einen Ventilkörper und einen Ventilstößel, der mit einer am Ventilkörper ausgebildeten Ventilsitzfläche einen Dichtsitz bildend zusammenwirkt. Eine Ventilfeder beaufschlagt den Ventilstößel gegen die Ventilsitzfläche. Ferner umfasst das Einlassventil einen als Tauchanker ausgebildeten Anker, der mit dem Ventilstößel verbunden ist, sowie einen Magneten mit einer Magnetspule, um ein auf den Anker einwirkendes Magnetfeld zu erzeugen, wenn die Magnetspule bestromt wird. Hierzu ist die Magnetspule über elektrisch leitende Kontaktstifte mit den Pins eines Steckers elektrisch verbunden. An electromagnetically controllable intake or intake valve for a high-pressure pump, in particular a radial or in-line piston pump for fuel injection systems, is shown by way of example from the published patent application DE 10 2010 027 745 A1. The inlet valve is arranged in a recess of a housing part of the high-pressure pump designed as a cylinder head and is fixed in position by means of a screw plug screwed into the cylinder head. It comprises a valve body and a valve tappet, which cooperates with a valve seat formed on the valve body forming a sealing seat. A valve spring acts on the valve tappet against the valve seat surface. Further, the inlet valve comprises an armature formed as a plunger armature, which is connected to the valve stem, and a magnet with a magnetic coil to generate a magnetic field acting on the armature when the solenoid is energized. For this purpose, the solenoid is electrically connected via electrically conductive pins with the pins of a plug.
Ausgehend von dem vorstehend genannten Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein elektromagnetisch ansteuerbares Saugventil für eine Hochdruckpumpe anzugeben, das sich einschließlich der Komponenten zur elektrischen Kontaktierung einer Magnetspule eines Magnetaktors einfach montieren und in eine Gehäusebohrung einer Hochdruckpumpe einsetzen lässt. Based on the above-mentioned prior art, the present invention seeks to provide an electromagnetically controllable suction valve for a high-pressure pump, including the components for electrically contacting a magnetic coil of a Simply mount the magnetic actuator and insert it into a housing bore of a high-pressure pump.
Zur Lösung der Aufgabe wird das elektromagnetisch ansteuerbare Saugventil mit den Merkmalen des Anspruchs 1 vorgeschlagen. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben. Ferner wird eine Hochdruckpumpe mit einem solchen Saugventil vorgeschlagen. To solve the problem, the electromagnetically controllable suction valve with the features of claim 1 is proposed. Advantageous developments of the invention are specified in the subclaims. Furthermore, a high pressure pump is proposed with such a suction valve.
Offenbarung der Erfindung Disclosure of the invention
Das für eine Hochdruckpumpe eines Kraftstoffeinspritzsystems, insbesondere eines Common-Rail-Einspritzsystems, vorgeschlagene elektromagnetisch ansteuerbare Saugventil umfasst ein Ventilschließelement, das in einer Bohrung eines Ventilkörpers hubbeweglich aufgenommen und unmittelbar oder mittelbar in Schließrichtung von der Federkraft einer Feder beaufschlagt ist, sowie einen mit einer Magnetspule eines Magnetaktors zusammenwirkenden hubbeweglichen Anker, der zur Steuerung der Hubbewegung des Ventilschließelements mit diesem koppelbar ist. Ferner umfasst das Saugventil einen Stecker zur elektrischen Kontaktierung der Magnetspule des Magnetaktors sowie eine Verschluss- schraube, mittels welcher das Saugventil in einer Gehäusebohrung der Hochdruckpumpe lagefixierbar ist. Erfindungsgemäß besitzt der Stecker eine Kunst- stoff-Umspritzung, die über einen Presssitz mit der Verschlussschraube verbunden ist. Der Stecker und die Umspritzung bilden vorliegend eine Baueinheit aus, die in einfacher Weise durch Einpressen in die Verschlussschraube mit dem Saugventil verbindbar ist. Dadurch verringert sich der Aufwand bei der Montage des Saugventils. Zudem ermöglicht der Presssitz den Einbau der Baueinheit aus Stecker und Umspritzung in jeder beliebigen Winkellage, so dass die Montage entsprechend der jeweiligen Anbausituation erfolgen kann. Bevorzugt ist zur Herstellung des Presssitzes ein Ringkörper, vorzugsweise ein metallischer Ringkörper, in die Kunststoff-Umspritzung integriert. Der Ringkörper dient als Stützkörper und bewirkt eine gewisse Formsteifigkeit der Kunststoff- Umspritzung, welche die Einbaulage der Baueinheit aus Stecker und The electromagnetically controllable intake valve proposed for a high-pressure pump of a fuel injection system, in particular a common rail injection system, comprises a valve closing element which is received in a liftable manner in a bore of a valve body and acted upon directly or indirectly in the closing direction by the spring force of a spring, as well as one with a magnetic coil a magnetic actuator cooperating liftable armature, which is coupled to control the lifting movement of the valve closing element with this. Further, the suction valve comprises a plug for electrically contacting the magnetic coil of the magnetic actuator and a screw plug, by means of which the suction valve is fixed in position in a housing bore of the high-pressure pump. According to the invention, the plug has a plastic encapsulation, which is connected via a press fit with the screw plug. The plug and the encapsulation in the present case form a structural unit which can be connected to the suction valve in a simple manner by pressing into the screw plug. This reduces the effort during assembly of the suction valve. In addition, the press fit allows the installation of the assembly of plug and encapsulation in any angular position, so that the assembly can be made according to the respective mounting situation. For producing the press fit, an annular body, preferably a metallic annular body, is preferably integrated into the plastic encapsulation. The ring body serves as a support body and causes a certain stiffness of plastic encapsulation, which the installation position of the assembly of plug and
Umspritzung in der Verschlussschraube sichert. Vorteilhafterweise ist der Ringkörper außenumfangseitig in der Kunststoff- Umspritzung angeordnet und liegt unmittelbar an der Verschlussschraube an. Das heißt, dass der Ringkörper nicht vollständig von dem Material der Encapsulation in the locking screw secures. Advantageously, the annular body is arranged on the outer peripheral side in the plastic encapsulation and lies directly against the closure screw. This means that the ring body is not completely covered by the material of the
Umspritzung umgeben ist, sondern eine in Kontakt mit der Verschlussschraube stehende Außenumfangsfläche besitzt, über welche eine Pressverbindung mit der Verschlussschraube herstellbar ist. Encapsulation is surrounded, but has a standing in contact with the screw outer peripheral surface, via which a press connection with the screw plug can be produced.
Weiterhin bevorzugt ist in die Kunststoff-Umspritzung wenigstens ein Pin und/oder Kontaktstift zur elektrischen Kontaktierung der Magnetspule integriert. Die Baueinheit aus Stecker und Umspritzung umfasst demnach wenigstens einen Pin und/oder Kontaktstift, wodurch der Montageaufwand weiter reduziert wird. Further preferably, at least one pin and / or contact pin for electrical contacting of the magnetic coil is integrated into the plastic encapsulation. The assembly of plug and encapsulation therefore comprises at least one pin and / or pin, whereby the assembly cost is further reduced.
Ferner wird vorgeschlagen, dass der Stecker mittels der Kunststoff-Umspritzung mit dem Magnetaktor verbunden ist, so dass der Stecker, die Kunststoff-It is further proposed that the plug is connected to the magnet actuator by means of the plastic encapsulation, so that the plug, the plastic
Umspritzung und der Magnetaktor eine Baueinheit ausbilden. Zur elektrischen Kontaktierung kann in die Umspritzung zudem wenigstens ein Pin und/oder Kontaktstift integriert sein. Die Umspritzung erfolgt vorzugsweise separat mit den Bauteilen Stecker, Magnetspule und etwaigen Kontaktelementen. Dadurch wird der Montageaufwand an der Saugventilmontagelinie deutlich reduziert. Baugruppen können ggf. aus dem Fremdbezug beschafft werden. Encapsulation and the magnetic actuator form a structural unit. For electrical contacting, at least one pin and / or contact pin can also be integrated into the encapsulation. The encapsulation is preferably carried out separately with the components plug, magnetic coil and any contact elements. As a result, the assembly work on the Saugventilmontagelinie is significantly reduced. If necessary, assemblies can be procured from the external procurement.
In einer bevorzugten Ausgestaltung der Erfindung ist der Stecker in einem Au- ßenumfangsbereich der Kunststoff-Umspritzung angeordnet. Der Stecker ist demnach radial positioniert. Die Pressverbindung der mit dem Stecker verbundenen Kunststoff-Umspritzung mit der Verschlussschraube ermöglicht eine der jeweiligen Anschlusssituation entsprechende Winkellage des Steckers, so dass eine größtmögliche Flexibilität bezüglich des elektrischen Anschlusses gegeben ist. Denn im Einpressbereich ist die Kunststoffumspritzung rotationssymmetrisch ausgebildet, um die Pressverbindung mit der Verschlussschraube herzustellen. In a preferred embodiment of the invention, the plug is arranged in an outer peripheral area of the plastic encapsulation. The plug is therefore positioned radially. The press connection of the plastic encapsulation connected to the plug with the closure screw allows an angular position of the plug corresponding to the respective connection situation, so that the greatest possible flexibility with respect to the electrical connection is provided. Because in the press-in area the plastic extrusion is rotationally symmetrical in order to produce the press connection with the screw plug.
In Weiterbildung der Erfindung wird vorgeschlagen, dass der Magnetaktor einen Magnetkern mit einer ringförmigen Ausnehmung zur Aufnahme der Magnetspule umfasst. Der Magnetkern kann ebenfalls Teil der Baueinheit aus Stecker, Mag- netspule und Kunststoff-Umspritzung sowie etwaigen Kontaktelementen sein, wodurch der Montageaufwand weiter reduziert wird. Ferner kann der Magnetkern - alternativ oder ergänzend zum Ringkörper - als Stützkörper eingesetzt werden. In a further development of the invention it is proposed that the magnetic actuator comprises a magnetic core with an annular recess for receiving the magnetic coil. The magnetic core may also be part of the assembly consisting of plug, magnetic coil and plastic encapsulation and any contact elements, whereby the assembly effort is further reduced. Further, the magnetic core - as an alternative or in addition to the ring body - can be used as a support body.
Bevorzugt weist die Verschlussschraube einen radial verlaufenden ringförmigen Absatz zur Abstützung des Magnetaktors in axialer Richtung auf. Über den ringförmigen Absatz bzw. den hieran abgestützten Magnetkern ist die axiale Einbaulage der Kunststoff-Umspritzung einschließlich des Steckers und/oder der Magnetspule festlegbar. Preferably, the closure screw on a radially extending annular shoulder for supporting the Magnetaktors in the axial direction. About the annular shoulder or the magnetic core supported thereon, the axial mounting position of the plastic extrusion coating including the plug and / or the magnetic coil can be fixed.
Ferner wird eine Hochdruckpumpe mit einem erfindungsgemäßen Saugventil zur Verbindung eines Pumpenarbeitsraums der Hochdruckpumpe mit einem Kraftstoffzulauf vorgeschlagen. Das Saugventil ist dabei in eine Gehäusebohrung der Hochdruckpumpe eingesetzt und mittels der Verschlussschraube lagefixiert. Bei der Montage der Hochdruckpumpe kann zunächst der Ventilkörper einschließlich des Ventilschließelements und der Feder in die Gehäusebohrung eingesetzt und mittels der Verschlussschraube fixiert werden. Anschließend werden der Anker und der Magnetaktor - sofern nicht Teil der Baueinheit aus Stecker und Furthermore, a high-pressure pump is proposed with a suction valve according to the invention for connecting a pump working space of the high-pressure pump with a fuel inlet. The suction valve is inserted into a housing bore of the high pressure pump and fixed in position by means of the screw plug. When installing the high-pressure pump, first of all the valve body including the valve closing element and the spring can be inserted into the housing bore and fixed by means of the screw plug. Then the armature and the magnetic actuator - if not part of the assembly of plug and
Umspritzung - in die Verschlussschraube eingesetzt. Nachfolgend wird der Stecker für den elektrischen Anschluss des Magnetaktors über die Kunststoff- Umspritzung in die Verschlussschraube eingepresst. Die Winkellage des Steckers wird beim Einpressen festgelegt. In die Umspritzung integrierte Kontaktelemente stellen dabei den elektrischen Kontakt des Steckers mit der Magnetspule des Magnetaktors her. Das Einpressen ermöglicht eine einfache und schnelle Montage des Saugventils und damit der Hochdruckpumpe. Sofern der Magnetaktor oder Teile des Encapsulation - inserted in the screw plug. Subsequently, the plug for the electrical connection of the magnetic actuator is pressed into the screw plug via the plastic encapsulation. The angular position of the plug is determined during pressing. In the encapsulation integrated contact elements make the electrical contact of the plug with the magnetic coil of the magnetic actuator ago. The pressing in allows a simple and quick installation of the suction valve and thus the high-pressure pump. If the magnetic actuator or parts of
Magnetaktors eine Baueinheit mit dem Stecker und der Umspritzung bildet bzw. bilden, kann die Montage weiter vereinfacht und beschleunigt werden. Eine bevorzugte Ausführungsform der Erfindung wird nachfolgend anhand der beigefügten Zeichnung näher beschrieben. Diese zeigt einen schematischen Längsschnitt durch ein erfindungsgemäßes Saugventil. Ausführliche Beschreibung der Zeichnung Magnet actuator forms a unit with the plug and the encapsulation or form, the assembly can be further simplified and accelerated. A preferred embodiment of the invention will be described below with reference to the accompanying drawings. This shows a schematic longitudinal section through an inventive suction valve. Detailed description of the drawing
Das in der einzigen Figur schematisch dargestellte elektromagnetisch The electromagnetically illustrated in the single figure
ansteuerbare Saugventil ist in eine Gehäusebohrung 10 einer Hochdruckpumpe eingesetzt und dient der Verbindung eines Pumpenarbeitsraums 19 mit einem Kraftstoffzulauf 20, so dass im Saugbetrieb der Hochdruckpumpe der Pumpenarbeitsraum 19 über das Saugventil mit Kraftstoff befüllbar ist. Das Saugventil umfasst einen plattenförmigen Ventilkörper 3 mit einer axial geführten Bohrung 2, in welcher ein Ventilschließelement 1 hubbeweglich aufgenommen ist, das in den Pumpenarbeitsraum 19 öffnet. In Schließrichtung ist das Ventilschließelement 1 von der Federkraft einer Feder 4 beaufschlagt. controllable suction valve is inserted into a housing bore 10 of a high-pressure pump and serves to connect a pump working chamber 19 with a fuel inlet 20, so that in the suction operation of the high-pressure pump, the pump working chamber 19 via the suction valve with fuel can be filled. The suction valve comprises a plate-shaped valve body 3 with an axially guided bore 2, in which a valve closing element 1 is received in a liftable manner, which opens into the pump working chamber 19. In the closing direction, the valve closing element 1 is acted upon by the spring force of a spring 4.
In die Bohrung 2 des Ventilkörpers 3 münden Radialbohrungen 23, die in hydraulischer Verbindung mit dem Kraftstoffzulauf 20 stehen. Auf der Höhe der Radialbohrungen 23 ist der Ventilkörper 3 von einem Siebelement 24 umgeben, um zu verhindern, dass etwaige im Kraftstoff enthaltene Partikel in das Saugventil gelangen. Der Ventilkörper 3 ist über eine Dichtscheibe 25 an einem Absatz der Gehäusebohrung 10 abgestützt, um den Pumpenarbeitsraum 19 gegenüber dem Kraftstoffzulauf 20 abzudichten. Eine axiale Anpresskraft wird über eine Verschlussschraube 9 bewirkt, die in die Gehäusebohrung 10 eingeschraubt und an dem Ventilkörper 3 abgestützt ist. In the bore 2 of the valve body 3 open radial bores 23, which are in hydraulic communication with the fuel inlet 20. At the level of the radial bores 23, the valve body 3 is surrounded by a sieve element 24 in order to prevent any particles contained in the fuel from entering the suction valve. The valve body 3 is supported via a sealing washer 25 on a shoulder of the housing bore 10 in order to seal the pump working chamber 19 with respect to the fuel inlet 20. An axial contact force is effected via a screw plug 9, which is screwed into the housing bore 10 and supported on the valve body 3.
Innerhalb der Verschlussschraube 9 ist die Aktorik aufgenommen, die einen Magnetaktor 6 mit einer Magnetspule 5 und einen mit der Magnetspule 5 zusammenwirkenden Anker 7 umfasst. Denn bei einer Bestromung der Magnetspule 5 wird ein Magnetfeld erzeugt, das den Anker 7 entgegen der Federkraft einer Feder 22 in Richtung der Magnetspule 5 bewegt. Bei Beendigung der Within the screw plug 9, the actuator is included, comprising a magnetic actuator 6 with a magnetic coil 5 and an interacting with the magnetic coil 5 anchor 7. For when energizing the magnetic coil 5, a magnetic field is generated, which moves the armature 7 against the spring force of a spring 22 in the direction of the magnetic coil 5. At the end of the
Bestromung der Magnetspule 5 drückt die Feder 22 den Anker 7 in Richtung des Ventilschließelements 1 , so dass dieses über den Anker 7 in eine Offenstellung bewegt wird. Die axiale Lage des Ventilschließelements 1 ist demnach über den Hub des Ankers 7 beeinflussbar. Energization of the solenoid 5, the spring 22 pushes the armature 7 in the direction of the valve closing element 1, so that this is moved via the armature 7 in an open position. The axial position of the valve closing element 1 can therefore be influenced via the stroke of the armature 7.
Die Magnetspule 5 ist in einer ringförmigen Ausnehmung 17 eines Magnetkerns 16 eingelassen, der Teil des Magnetkreises ist. Zwischen dem Magnetkern 16 und dem Anker 7 ist eine Restluftspaltscheibe 21 angeordnet, welche als Hubanschlag dient. Der Magnetkern 16 ist dabei an einem radial verlaufenden ringförmigen Absatz 18 der Gehäusebohrung 10 abgestützt. The magnetic coil 5 is embedded in an annular recess 17 of a magnetic core 16, which is part of the magnetic circuit. Between the magnetic core 16 and the armature 7, a residual air gap disc 21 is arranged, which as Stroke serves. The magnetic core 16 is supported on a radially extending annular shoulder 18 of the housing bore 10.
Zur Bestromung der Magnetspule 5 sind Elemente zur elektrischen Kontaktie- rung vorgesehen, die vorliegend einen mit der Magnetspule 5 verbundenen Kontaktstift 15 und einen Pin 14 umfassen, der wiederum Teil eines Steckers 8 ist. Der Stecker 8, der Pin 14 und der Kontaktstift 15 sind über eine Kunststoff- Umspritzung 1 1 verbunden, in die außenumfangseitig ein metallischer Ringkörper 13 zur Herstellung eines Presssitzes 12 innerhalb der Verschlussschraube 9 integriert ist. Das heißt, dass die Kunststoff-Umspritzung 1 1 in die Verschlussschraube 9 eingepresst ist. Vorliegend bildet die Kunststoff-Umspritzung 1 1 mit dem Stecker 8, dem Pin 14, dem Kontaktstift 15 sowie dem Magnetaktor 6 eine Baueinheit aus, welche das Einsetzen der Aktorik in die Verschlussschraube 9 erleichtert, da die Baueinheit als Ganzes in die Verschlussschraube 9 eingesetzt wird. Der radial verlaufende ringförmige Absatz 18 der Gehäusebohrung 10 bestimmt dabei die axiale Lage der Baueinheit, während die Winkellage aufgrund der Rotationssymmetrie im Einpressbereich frei wählbar ist. Der Stecker 8, der radial aus der Umspritzung 1 1 vorsteht, kann demzufolge beliebig orientiert werden. For energizing the magnetic coil 5 elements for electrical contacting tion are provided, which in the present case comprise a connected to the magnetic coil 5 pin 15 and a pin 14, which in turn is part of a plug 8. The plug 8, the pin 14 and the contact pin 15 are connected via a plastic encapsulation 1 1, in the outer peripheral side, a metallic annular body 13 for producing a press fit 12 is integrated within the screw plug 9. This means that the plastic encapsulation 1 1 is pressed into the screw plug 9. In the present case, the plastic encapsulation 1 1 with the plug 8, the pin 14, the contact pin 15 and the solenoid actuator 6 forms a structural unit which facilitates the insertion of the actuator into the locking screw 9, since the structural unit is inserted as a whole in the locking screw 9 , The radially extending annular shoulder 18 of the housing bore 10 determines the axial position of the assembly, while the angular position is freely selectable due to the rotational symmetry in the press-fit. The plug 8, which protrudes radially from the encapsulation 1 1, can therefore be arbitrarily oriented.
Abwandlungen der Erfindung sind möglich, indem die in die Verschlussschraube 9 eingepresste Baueinheit auf einen Stecker 8 mit einer Kunststoff- Umspritzung 1 1 und etwaigen Kontaktelementen in Form eines Pins 14 und/oder eines Kontaktstiftes 15 reduziert wird. Ergänzend kann die Magnetspule 5 mit oder ohne Magnetkern 16 Teil der Baueinheit sein. Modifications of the invention are possible by the pressed-in the screw 9 assembly is reduced to a connector 8 with a plastic encapsulation 1 1 and any contact elements in the form of a pin 14 and / or a contact pin 15. In addition, the magnetic coil 5 with or without magnetic core 16 may be part of the structural unit.

Claims

Ansprüche claims
1 . Elektromagnetisch ansteuerbares Saugventil für eine Hochdruckpumpe eines Kraftstoffeinspritzsystems, insbesondere eines Common-Rail- Einspritzsystems, umfassend ein Ventilschließelement (1 ), das in einer Bohrung (2) eines Ventilkörpers (3) hubbeweglich aufgenommen und unmittelbar oder mittelbar in Schließrichtung von der Federkraft einer Feder (4) beaufschlagt ist, sowie einen mit einer Magnetspule (5) eines Magnetaktors (6) zusammenwirkenden hubbeweglichen Anker (7), der zur Steuerung der Hubbewegung des Ventilschließelements (1 ) mit diesem koppelbar ist, ferner umfassend einen Stecker (8) zur elektrischen Kontaktierung der Magnetspule (5) des Magnetaktors (6) sowie eine Verschlussschraube (9), mittels welcher das Saugventil in einer Gehäusebohrung (10) der Hochdruckpumpe la- gefixierbar ist, 1 . Electromagnetically controllable intake valve for a high-pressure pump of a fuel injection system, in particular a common rail injection system, comprising a valve closing element (1) received in a bore (2) of a valve body (3) liftably and directly or indirectly in the closing direction of the spring force of a spring ( 4) is acted upon, as well as a with a solenoid coil (5) of a magnetic actuator (6) cooperating liftable armature (7) which is for controlling the lifting movement of the valve closing element (1) coupled thereto, further comprising a plug (8) for electrical contacting the magnetic coil (5) of the magnetic actuator (6) and a closure screw (9), by means of which the suction valve in a housing bore (10) of the high-pressure pump can be fixed la-,
dadurch gekennzeichnet, dass der Stecker (8) eine Kunststoff- Umspritzung (1 1 ) besitzt, die über einen Presssitz (12) mit der Verschlussschraube (9) verbunden ist.  characterized in that the plug (8) has a plastic encapsulation (1 1) which is connected via a press fit (12) with the closure screw (9).
2. Saugventil nach Anspruch 1 , 2. Suction valve according to claim 1,
dadurch gekennzeichnet, dass zur Herstellung des Presssitzes (12) ein Ringkörper (13), vorzugsweise ein metallischer Ringkörper (13), in die Kunststoff-Umspritzung (1 1 ) integriert ist.  characterized in that for the production of the press fit (12) an annular body (13), preferably a metallic annular body (13), in the plastic encapsulation (1 1) is integrated.
3. Saugventil nach Anspruch 2, 3. Suction valve according to claim 2,
dadurch gekennzeichnet, dass der Ringkörper (13) außenumfangseitig in der Kunststoff-Umspritzung angeordnet ist und unmittelbar an der Verschlussschraube (9) anliegt.  characterized in that the annular body (13) is arranged on the outer peripheral side in the plastic encapsulation and directly against the locking screw (9).
4. Saugventil nach einem der vorhergehenden Ansprüche, 4. Suction valve according to one of the preceding claims,
dadurch gekennzeichnet, dass in die Kunststoff-Umspritzung (1 1 ) wenigstens ein Pin (14) und/oder Kontaktstift (15) zur elektrischen Kontaktierung der Magnetspule (5) integriert ist. characterized in that in the plastic encapsulation (1 1) at least one pin (14) and / or contact pin (15) for electrically contacting the magnetic coil (5) is integrated.
5. Saugventil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Stecker (8) mittels der Kunststoff- Umspritzung (1 1 ) mit dem Magnetaktor (6) verbunden ist, so dass der Stecker (8), die Kunststoff-Umspritzung (1 1 ) und der Magnetaktor (6) eine Baueinheit ausbilden. 5. Suction valve according to one of the preceding claims, characterized in that the plug (8) by means of the plastic encapsulation (1 1) with the magnetic actuator (6) is connected, so that the plug (8), the plastic encapsulation (1 1) and the magnetic actuator (6) form a structural unit.
6. Saugventil nach einem der vorhergehenden Ansprüche, 6. Suction valve according to one of the preceding claims,
dadurch gekennzeichnet, dass der Stecker (8) in einem Außenumfangsbe- reich der Kunststoff-Umspritzung (1 1 ) angeordnet ist.  characterized in that the plug (8) in an outer peripheral region of the plastic extrusion coating (1 1) is arranged.
7. Saugventil nach einem der vorhergehenden Ansprüche, 7. Suction valve according to one of the preceding claims,
dadurch gekennzeichnet, dass der Magnetaktor (6) einen Magnetkern (16) mit einer ringförmigen Ausnehmung (17) zur Aufnahme der Magnetspule (5) umfasst.  characterized in that the magnetic actuator (6) comprises a magnetic core (16) with an annular recess (17) for receiving the magnetic coil (5).
8. Saugventil nach Anspruch 7, 8. Suction valve according to claim 7,
dadurch gekennzeichnet, dass die Verschlussschraube (9) einen radial verlaufenden ringförmigen Absatz (18) zur Abstützung des Magnetaktors (6) in axialer Richtung aufweist.  characterized in that the closure screw (9) has a radially extending annular shoulder (18) for supporting the magnetic actuator (6) in the axial direction.
9. Hochdruckpumpe mit einem Saugventil nach einem der vorhergehenden Ansprüche zur Verbindung eines Pumpenarbeitsraums (19) der Hochdruckpumpe mit einem Kraftstoffzulauf (20), wobei das Saugventil in eine 9. High-pressure pump with a suction valve according to one of the preceding claims for connecting a pump working chamber (19) of the high-pressure pump with a fuel inlet (20), wherein the suction valve in a
Gehäusebohrung (10) der Hochdruckpumpe eingesetzt und mittels der Verschlussschraube (9) lagefixiert ist.  Housing bore (10) of the high-pressure pump is inserted and fixed in position by means of the screw plug (9).
PCT/EP2014/069394 2013-09-19 2014-09-11 Electromagnetically actuated suction valve WO2015039949A1 (en)

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