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EP2871352B1 - Valve for measuring out fluid - Google Patents

Valve for measuring out fluid Download PDF

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Publication number
EP2871352B1
EP2871352B1 EP14183692.4A EP14183692A EP2871352B1 EP 2871352 B1 EP2871352 B1 EP 2871352B1 EP 14183692 A EP14183692 A EP 14183692A EP 2871352 B1 EP2871352 B1 EP 2871352B1
Authority
EP
European Patent Office
Prior art keywords
armature
valve
ring
valve needle
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.)
Not-in-force
Application number
EP14183692.4A
Other languages
German (de)
French (fr)
Other versions
EP2871352A1 (en
Inventor
Ralf Kromer
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 EP2871352A1 publication Critical patent/EP2871352A1/en
Application granted granted Critical
Publication of EP2871352B1 publication Critical patent/EP2871352B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M51/0675—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 valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the invention is based on a valve for metering fluid according to the preamble of claim 1, wherein the standing for a flowing or flowing medium, superordinate term fluid is used in accordance with the fluid dynamics for gases and liquids.
  • a known fuel injection valve ( DE 101 08 945 A1 ) has a sleeve-shaped nozzle body which is closed by a valve seat body with an injection opening enclosed by a valve seat.
  • a hollow valve needle is arranged axially displaceably, which carries a guided in the valve seat body, with the valve seat forming a sealing seat closing head.
  • the valve needle is actuated by an electromagnet against the closing force of a valve closing spring acting on the valve needle.
  • the electromagnet has a cup-shaped outer pole, a hollow-cylindrical inner pole and an armature which delimits a working air gap with the annular end face of the inner pole and which sits axially displaceably on the valve needle.
  • the injection valve has an apparatus for generating an Ankervorhubs, which is arranged at the Schellerkopffernen end of the valve needle Mitauerflansch, on the side facing away from the driver flange side of the armature on the valve needle fixed anchor stop and a Vorhubfeder has.
  • the Vorhubfeder sits inside the inner pole on an annular recess in Mitauerflansch and is supported on the one hand on Mit constitutionalflansch and on the other hand, at the anchor.
  • the closing head is pressed onto the valve seat by the valve closing spring via the valve needle.
  • the anchor is, acted upon by the Vorhubfeder, on the anchor stop.
  • the armature Upon energization of the electromagnet, the armature is moved against the spring force of the return spring and the Vorhubfeder in the stroke direction by the magnetic spring.
  • the stroke of the armature is divided into a forward stroke or armature free travel, which serves to close a Vorhubspalts, and an opening stroke.
  • the anchor takes over the Mitauerflansch with the valve needle, and with the onset of the opening stroke lifts the closing head from the valve seat.
  • Another example is from the JP 2011 208603 A known.
  • the metering valve according to the invention with the features of claim 1 has the advantage that the valve can be built much shorter by the displacement of the Vorhubfeder in the region of the armature.
  • a structurally conditioned short guide area of the armature on the valve needle, connected to the indirect, radial support of the valve needle via the armature, can lead to undesirable tilting of the armature on the valve needle and thus to tilting of the inner pole facing end face of the armature Working air gap limited, lead.
  • This is counteracted according to the invention by the bipartite of the armature.
  • the armature guide disc firmly connected to the valve needle is guided axially on the outside and limits the working air gap. For a tilting of the inner pole-side anchor surface is excluded.
  • the Ankerokweg or Vorhubspalt for Ankervorhub is moved between armature guide disc and the displaceable relative to the valve needle on the valve needle anchor ring, which covers the Vorhubfeder in a longer ring section and is guided with a shorter ring portion on the valve needle.
  • the leadership of the armature guide disc in the non-magnetic separation area between the outer and inner pole prevents unwanted, direct magnetic flux between armature guide disc and outer pole.
  • a plurality of angularly offset guide surfaces are formed on the circumference of the armature guide disk.
  • non-magnetic guide bushing in the first ring portion of the anchor ring between the anchor ring and the valve needle fixed to the anchor ring, non-magnetic guide bushing is arranged.
  • the non-magnetic guide bushing in a valve needle made of a magnetic material for a magnetic separation between the valve needle and anchor ring.
  • the guide bushing can be replaced by a guide collar formed integrally with the first ring section of the anchor ring and projecting beyond the inner wall of the second ring section.
  • valve for metering fluid is preferred as an injection valve for injecting fuel in one Fuel injection system used by internal combustion engines. However, it can also be used in gas engines or in heating systems for the metered metering of fluid fuel or as a metering valve for injecting a reducing agent into the exhaust gas tract of an internal combustion engine for the purpose of reducing nitrogen oxides.
  • the valve has a valve seat body 11 with a valve seat 12 enclosed by a metering opening 13, a means of a closing head 15 the metering opening 13 controlling valve needle 14, which is guided over the closing head 15 in the valve seat body 11, a valve needle 14 acting on the valve closing spring 16, the closing the metering opening 13 presses the closing head 15 onto the valve seat 12, and a solenoid valve 17 actuating the valve needle 14 against the closing or spring force of the valve closing spring 16.
  • the electromagnet 17 has in a known manner an inner pole 18, an outer pole 19 with an amagnetic separation region 20 to the inner pole 18 and a seated on the valve needle 14, with the inner pole 18 a working air gap 21 of the electromagnet 17 limiting armature 22.
  • a magnetic coil 26 consisting of a voltage applied to the separator ring 25 coil carrier 27 and wound on the bobbin 27 exciter winding 28, was added.
  • a magnetic yoke 29 is produced from the magnet housing 23 to the magnet core 24.
  • the excitation winding 28 of the magnetic coil 26 is connected via contact strips 30 with an electrical connector 31.
  • a hollow cylindrical connecting piece 32 is stumped coaxially, in which a fluid inlet 33 is formed.
  • the connecting piece 32, a part of the magnetic core 24 and the electrical connector 31 are integrated into a plastic casing 34, which partially overlaps the magnet housing 23 axially.
  • the magnet housing 23 is provided with a stepped pot bottom, and a valve sleeve 35 connects the valve seat body 11 with the smallest in diameter portion of the pot bottom.
  • the coaxial in the valve sleeve 35 extending, hollow cylindrical valve needle 14 protrudes into the hollow cylindrical magnetic core 24 and is open at the front.
  • the valve needle 14 is preceded by a filter 36.
  • the flowing via the fluid inlet 33 into the valve fluid enters radially into the filter 36 and axially from the filter 36 and flows through the hollow valve needle 14 and radial holes 37 of the valve needle 14 in the region of the valve sleeve 35 to the orifice 13, so that the Closing head 15 is acted upon by the pressurized fluid.
  • the valve closing spring 16 is arranged in the interior of the hollow cylindrical magnetic core 24, is seated on the valve needle 14 and axially supported on the one hand on the valve needle 14 and on the other hand on the firmly pressed into the magnetic core 24 filter 36 from which at the same time an adjusting element for adjusting the closing force of the valve closing spring 16 forms.
  • a device for generating an Ankervorhubs or an armature free travel comprises a fixed to the valve needle 14 anchor stopper 38 and an armature 22 in the direction of anchor stop 38 acting on Vorhubfeder 39, which is arranged to shorten the axial length of the valve within the armature 22 on the valve needle 14.
  • the in FIG. 2 in enlarged sectional view and in FIG. 3 In an enlarged lower view to be seen anchor 22 axially divided into an armature guide disc 221 and an anchor ring 222.
  • the armature guide disc 221 is fixedly connected to the valve needle 14 and limited with its inner pole side annular surface the working air gap 21 of the electromagnet 17.
  • the armature guide disc 221 is axially displaceable in the non-magnetic separation region 20 of the outer pole 19, ie in the separator ring 25, and has this on the outer circumference a plurality of angular offset Guide surfaces 221 a on ( FIG. 3 ).
  • the armature ring 222 is seated axially displaceable on the valve needle 14 between the armature guide disc 221 and armature stop 38.
  • the Ankerokke or -vorhub 41 forming displacement on the valve needle 14 is limited on the one hand by the armature stopper 38 and on the other hand by the armature guide disc 221.
  • the armature ring 222 is positioned so that a radial magnetic flux between the outer pole 19 and the magnet housing 23 and the anchor ring 222 is ensured.
  • the outer diameter of the anchor ring 222 is selected so that its Displacement of a mechanical contact with the outer pole 19 or magnet housing 23 is excluded.
  • the anchor ring 222 has an axially shorter first ring portion 222a with a smaller inner diameter and an axially longer second ring portion 222b with a larger inner diameter.
  • a one-piece guide collar radially projecting beyond the inner wall of the second annular section 222b is present on the first annular section 222a.
  • This in FIG. 2 for a later described modification of the armature 22 shown and designated 40 component represents in this context this guide collar, which in the rest in FIG. 1 can be seen as an integral part of the anchor ring 22.
  • the second ring portion 222b encloses due to its larger inner diameter which sits on the valve needle 14 Vorhubfeder 39 with a radial distance.
  • the Vorhubfeder 39 is supported on the one hand on the armature guide plate 221, and thus on the valve needle 14, and on the other hand on the anchor ring 222, wherein the ankerring workede support on the guide collar, on its annular end face made.
  • the valve needle 14 is preferably non-magnetic, so it consists of a magnetically not or only poorly conductive material. If the valve needle 14 is magnetic, that is, if it consists of a magnetically highly conductive material, a needle section is formed in the valve needle 14 in an amagnetic manner, which extends over the first ring section 222a. This non-magnetic needle section provides a magnetic separation between anchor ring 222 and valve needle 14.
  • the magnetic separation of valve needle 14 and armature 22 can be laid in the anchor ring 222.
  • the seated on the valve needle 14 guide collar of the first ring portion 222a has a large magnetic resistance.
  • the guide collar is replaced by a separate guide bush 40 made of a magnetically non or poorly conductive material, which is firmly connected to the anchor ring 222.
  • the inner diameter of the first ring portion 222a is the same the inner diameter of the second ring portion 222 b made and the guide sleeve 40 between the first ring portion 222 a and the valve needle 14 is arranged.
  • the guide sleeve 40 assumes the leadership of the anchor ring 222 on the valve needle 14 and with its annular end face the ankerring workede support the Vorhubfeder 39th
  • the armature guide plate 221 remains in the position described by the pressure force of the valve closing spring 16.
  • the armature ring 222 is accelerated by the magnetic force in the direction of armature guide plate 221.
  • Anchor ring 222, armature guide disc 221 and valve needle 14 move together until the armature guide disc 221 reaches the inner pole 18 or magnetic core 24. The valve is fully open.
  • valve closing spring 16 pushes the valve needle 14 back with armature 22 until the closing head 15 presses on the valve seat 12 and the metering opening 13 closes.
  • the Vorhubfeder 39 presses the anchor ring 222 against the anchor stop 38 and is between the anchor ring 222 and armature guide plate 221, the gap for the Ankerokweg or -vorhub 41 again.

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

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Ventil zum Zumessen von Fluid nach dem Oberbegriff des Anspruchs 1, wobei der für ein strömendes oder fließendes Medium stehende, übergeordnet Begriff Fluid in Übereinstimmung mit der Strömungslehre für Gase und Flüssigkeiten verwendet wird.The invention is based on a valve for metering fluid according to the preamble of claim 1, wherein the standing for a flowing or flowing medium, superordinate term fluid is used in accordance with the fluid dynamics for gases and liquids.

Ein bekanntes Brennstoffeinspritzventil ( DE 101 08 945 A1 ) weist einen hülsenförmigen Düsenkörper auf, der von einem Ventilsitzkörper mit einer von einem Ventilsitz umschlossenen Abspritzöffnung abgeschlossen ist. Im Düsenkörper ist eine hohle Ventilnadel axial verschieblich angeordnet, die einen im Ventilsitzkörper geführten, mit dem Ventilsitz einen Dichtsitz bildenden Schließkopf trägt. Die Ventilnadel wird von einem Elektromagneten gegen die Schließkraft einer die Ventilnadel beaufschlagenden Ventilschließfeder betätigt. Der Elektromagnet weist einen topfförmigen Außenpol, einen hohlzylindrischen Innenpol und einen mit der ringförmigen Stirnfläche des Innenpols einen Arbeitsluftspalt begrenzenden Anker auf, der axial verschieblich auf der Ventilnadel sitzt. Innenpol und Außenpol sind durch ein amagnetisches Verbindungsbauteil miteinander verbunden. Zur Verbesserung der Öffnungsdynamik des Einspritzventils und Erzielung eines Dämpfungseffekts gegen Prellen beim Schließen des Einspritzventils besitzt das Einspritzventil eine Vorrichtung zur Erzeugung eines Ankervorhubs, die einen an dem schließkopffernen Ende der Ventilnadel fest angeordneten Mitnehmerflansch, einen auf der vom Mitnehmerflansch abgekehrten Seite des Ankers auf der Ventilnadel festgelegten Ankeranschlag und eine Vorhubfeder aufweist. Die Vorhubfeder sitzt innerhalb des Innenpols auf einem ringförmigen Einstich im Mitnehmerflansch und stützt sich einerseits am Mitnehmerflansch und andererseits am Anker ab. Bei geschlossenem Einspritzventil ist durch die Ventilschließfeder über die Ventilnadel der Schließkopf auf den Ventilsitz aufgepresst. Der Anker liegt, beaufschlagt von der Vorhubfeder, am Ankeranschlag an. Bei Erregung des Elektromagneten wird durch das Magnetfeder der Anker entgegen Federkraft der Rückstellfeder sowie der Vorhubfeder in Hubrichtung bewegt. Der Hub des Ankers ist dabei in einen Vorhub oder Ankerfreiweg, der zum Schließen eines Vorhubspalts dient, und einen Öffnungshub aufgeteilt. Nach Schließen des Vorhubspalts nimmt der Anker über den Mitnehmerflansch die Ventilnadel mit, und mit Einsetzen des Öffnungshubs hebt der Schließkopf vom Ventilsitz ab. Ein anderes Beispiel ist aus dem JP 2011 208603 A bekannt.A known fuel injection valve ( DE 101 08 945 A1 ) has a sleeve-shaped nozzle body which is closed by a valve seat body with an injection opening enclosed by a valve seat. In the nozzle body, a hollow valve needle is arranged axially displaceably, which carries a guided in the valve seat body, with the valve seat forming a sealing seat closing head. The valve needle is actuated by an electromagnet against the closing force of a valve closing spring acting on the valve needle. The electromagnet has a cup-shaped outer pole, a hollow-cylindrical inner pole and an armature which delimits a working air gap with the annular end face of the inner pole and which sits axially displaceably on the valve needle. Inner pole and outer pole are connected to each other by an amagnetic connection component. To improve the opening dynamics of the injection valve and achieving a damping effect against bounce when closing the injection valve, the injection valve has an apparatus for generating an Ankervorhubs, which is arranged at the Schließkopffernen end of the valve needle Mitnehmerflansch, on the side facing away from the driver flange side of the armature on the valve needle fixed anchor stop and a Vorhubfeder has. The Vorhubfeder sits inside the inner pole on an annular recess in Mitnehmerflansch and is supported on the one hand on Mitnehmerflansch and on the other hand, at the anchor. When the injection valve is closed, the closing head is pressed onto the valve seat by the valve closing spring via the valve needle. The anchor is, acted upon by the Vorhubfeder, on the anchor stop. Upon energization of the electromagnet, the armature is moved against the spring force of the return spring and the Vorhubfeder in the stroke direction by the magnetic spring. The stroke of the armature is divided into a forward stroke or armature free travel, which serves to close a Vorhubspalts, and an opening stroke. After closing the Vorhubspalts the anchor takes over the Mitnehmerflansch with the valve needle, and with the onset of the opening stroke lifts the closing head from the valve seat. Another example is from the JP 2011 208603 A known.

Offenbarung der ErfindungDisclosure of the invention

Das erfindungsgemäße Zumessventil mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass durch die Verlagerung der Vorhubfeder in den Bereich des Ankers das Ventil deutlich kürzer gebaut werden kann. Ein dadurch konstruktiv bedingter kurzer Führungsbereich des Ankers auf der Ventilnadel, verbunden mit der indirekten, radialen Abstützung der Ventilnadel über den Anker, kann zu einem unerwünschten Verkippen des Ankers auf der Ventilnadel und damit zu einem Verkippen der dem Innenpol zugekehrten Stirnfläche des Ankers, die den Arbeitsluftspalt begrenzt, führen. Dem wird erfindungsgemäß durch die Zweiteiligkeit des Ankers begegnet. Die fest mit der Ventilnadel verbundene Ankerführungsscheibe ist außen axial geführt und begrenzt den Arbeitsluftspalt. Damit ist ein Verkippen der innenpolseitigen Ankerfläche ausgeschlossen. Der Ankerfreiweg oder Vorhubspalt für den Ankervorhub ist zwischen Ankerführungsscheibe und dem relativ zur Ventilnadel auf der Ventilnadel verschiebbaren Ankerring verlegt, der in einem längeren Ringabschnitt die Vorhubfeder überdeckt und mit einem kürzeren Ringabschnitt auf der Ventilnadel geführt ist. Die Führung der Ankerführungsscheibe im amagnetischen Trennbereich zwischen Außen- und Innenpol verhindert einen unerwünschten, direkten Magnetfluss zwischen Ankerführungsscheibe und Außenpol. Erfindungsgemäß sind am Umfang der Ankerführungsscheibe mehrere, winkelversetzte Führungsflächen ausgebildet. Dadurch wird eine radiale Rundumabstützung der Ankerführungsscheibe - und damit der Ventilnadel - mit nur minimalen Reibungsverlusten beim Ankerhub geschaffen.The metering valve according to the invention with the features of claim 1 has the advantage that the valve can be built much shorter by the displacement of the Vorhubfeder in the region of the armature. A structurally conditioned short guide area of the armature on the valve needle, connected to the indirect, radial support of the valve needle via the armature, can lead to undesirable tilting of the armature on the valve needle and thus to tilting of the inner pole facing end face of the armature Working air gap limited, lead. This is counteracted according to the invention by the bipartite of the armature. The armature guide disc firmly connected to the valve needle is guided axially on the outside and limits the working air gap. For a tilting of the inner pole-side anchor surface is excluded. The Ankerfreiweg or Vorhubspalt for Ankervorhub is moved between armature guide disc and the displaceable relative to the valve needle on the valve needle anchor ring, which covers the Vorhubfeder in a longer ring section and is guided with a shorter ring portion on the valve needle. The leadership of the armature guide disc in the non-magnetic separation area between the outer and inner pole prevents unwanted, direct magnetic flux between armature guide disc and outer pole. According to the invention, a plurality of angularly offset guide surfaces are formed on the circumference of the armature guide disk. As a result, a radial all-round support of the armature guide disk - and thus of the valve needle - is created with only minimal friction losses during the armature stroke.

Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Ventils möglich.The measures listed in the further claims are advantageous Further developments and improvements of the claim 1 valve possible.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist in dem ersten Ringabschnitt des Ankerrings zwischen dem Ankerring und der Ventilnadel eine mit dem Ankerring fest verbundene, amagnetische Führungsbuchse angeordnet. Die amagnetische Führungsbuchse sorgt bei einer Ventilnadel aus einem magnetischen Werkstoff für eine magnetische Trennung zwischen Ventilnadel und Ankerring.According to an advantageous embodiment of the invention, in the first ring portion of the anchor ring between the anchor ring and the valve needle fixed to the anchor ring, non-magnetic guide bushing is arranged. The non-magnetic guide bushing in a valve needle made of a magnetic material for a magnetic separation between the valve needle and anchor ring.

Der gleiche Effekt wird gemäß einer alternativen Ausführungsform der Erfindung durch einen über den ersten Ringabschnitt des Ankerrings sich erstreckenden, amagnetischen Bereich der ansonsten magnetischen Ventilnadel erzielt. In diesem Fall kann die Führungsbuchse durch einen mit dem ersten Ringabschnitt des Ankerrings einstückig ausgebildeten, über die Innenwand des zweiten Ringabschnitts überstehenden Führungsbund ersetzt werden.The same effect is achieved according to an alternative embodiment of the invention by an over the first ring portion of the anchor ring extending, nonmagnetic region of the otherwise magnetic valve needle. In this case, the guide bushing can be replaced by a guide collar formed integrally with the first ring section of the anchor ring and projecting beyond the inner wall of the second ring section.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung ist anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

  • Figur 1 einen Längsschnitt eines Ventils zum Zumessen von Fluid mit einem Elektromagneten zur Ventilsteuerung,
  • Figur 2 eine vergrößerte Darstellung des Ausschnitts II in Figur 1 mit einer Modifikation des Ankers des Elektromagneten,
  • Figur 3 eine Unteransicht des Ankers in Richtung Pfeil III in Figur 2.
The invention is explained in more detail in the following description with reference to an embodiment shown in the drawings. Show it:
  • FIG. 1 a longitudinal section of a valve for metering fluid with a solenoid for valve control,
  • FIG. 2 an enlarged view of the section II in FIG. 1 with a modification of the armature of the electromagnet,
  • FIG. 3 a bottom view of the armature in the direction of arrow III in FIG. 2 ,

Das in Figur 1 im Längsschnitt dargestellte Ventil zum Zumessen von Fluid wird bevorzugt als Einspritzventil zum Einspritzen von Kraftstoff in einer Kraftstoffeinspritzanlage von Brennkraftmaschinen eingesetzt. Es kann jedoch auch in Gasmotoren oder in Heizungsanlagen zum dosierten Zumessen von fluidem Brennstoff oder als Dosierventil zum Einspritzen eines Reduktionsmittels in den Abgastrakt einer Brennkraftmaschine zwecks Reduzierung von Stickoxiden Verwendung finden.This in FIG. 1 in longitudinal section shown valve for metering fluid is preferred as an injection valve for injecting fuel in one Fuel injection system used by internal combustion engines. However, it can also be used in gas engines or in heating systems for the metered metering of fluid fuel or as a metering valve for injecting a reducing agent into the exhaust gas tract of an internal combustion engine for the purpose of reducing nitrogen oxides.

Das Ventil weist einen Ventilsitzkörper 11 mit einer von einem Ventilsitz 12 umschlossenen Zumessöffnung 13, eine mittels eines Schließkopfs 15 die Zumessöffnung 13 steuernde Ventilnadel 14, die über den Schließkopf 15 im Ventilsitzkörper 11 geführt ist, eine die Ventilnadel 14 beaufschlagende Ventilschließfeder 16, die zum Schließen der Zumessöffnung 13 den Schließkopf 15 auf dem Ventilsitz 12 aufpresst, und einen die Ventilnadel 14 gegen die Schließ- oder Federkraft der Ventilschließfeder 16 betätigenden Elektromagneten 17 auf. Der Elektromagnet 17 besitzt in bekannter Weise einen Innenpol 18, einen Außenpol 19 mit einem amagnetischen Trennbereich 20 zum Innenpol 18 und einen auf der Ventilnadel 14 sitzenden, mit dem Innenpol 18 einen Arbeitsluftspalt 21 des Elektromagneten 17 begrenzenden Anker 22. Im dargestellten Ausführungsbeispiel ist der Außenpol 19 von einem topfförmigen Magnetgehäuse 23, der Innenpol 18 von einen hohlzylindrischen Magnetkern 24 und der amagnetische Trennbereich 20 von einem separaten Trennring 25 gebildet, der stirnseitig am Topfboden des Magnetgehäuses 23 anliegt und den hohlzylindrischen Magnetkern 24 axial übergreift. Im Magnetgehäuse 23 ist eine Magnetspule 26, bestehend aus einem am Trennring 25 anliegenden Spulenträger 27 und einer auf dem Spulenträger 27 aufgewickelten Erregerwicklung 28, aufgenommen. Oberhalb der Topföffnung des Magnetgehäuses 23 ist ein magnetischer Rückschluss 29 vom Magnetgehäuse 23 zum Magnetkern 24 hergestellt. Die Erregerwicklung 28 der Magnetspule 26 ist über Kontaktstreifen 30 mit einem elektrischen Anschlussstecker 31 verbunden. Auf den hohlzylindrischen Magnetkern 24 ist stumpf ein hohlzylindrisches Anschlussstück 32 koaxial aufgesetzt, in dem ein Fluidzulauf 33 ausgebildet ist. Das Anschlussstück 32, ein Teil des Magnetkerns 24 und der elektrische Anschlussstecker 31 sind in eine Kunststoffummantelung 34 eingebunden, die das Magnetgehäuse 23 teilweise axial übergreift. Das Magnetgehäuse 23 ist mit einem gestuften Topfboden versehen, und eine Ventilhülse 35 verbindet den Ventilsitzkörper 11 mit dem im Durchmesser kleinsten Abschnitt des Topfbodens. Die in der Ventilhülse 35 sich koaxial erstreckende, hohlzylindrische Ventilnadel 14 ragt in den hohlzylindrischen Magnetkern 24 hinein und ist stirnseitig offen. Im Magnetkern 24 ist der Ventilnadel 14 ein Filter 36 vorgeordnet. Das über den Fluidzulauf 33 in das Ventil einströmende Fluid tritt radial in den Filter 36 ein und axial aus dem Filter 36 aus und strömt durch die hohle Ventilnadel 14 und über Radialbohrungen 37 der Ventilnadel 14 im Bereich der Ventilhülse 35 zur Zumessöffnung 13, so dass der Schließkopf 15 von dem unter Druck stehenden Fluid beaufschlagt ist. Die Ventilschließfeder 16 ist im Innern des hohlzylindrischen Magnetkerns 24 angeordnet, sitzt auf der Ventilnadel 14 und stützt sich axial einerseits an der Ventilnadel 14 und andererseits an dem fest in den Magnetkern 24 eingepressten Filter 36 ab, der zugleich ein Justierelement zur Einstellung der Schließkraft der Ventilschließfeder 16 bildet.The valve has a valve seat body 11 with a valve seat 12 enclosed by a metering opening 13, a means of a closing head 15 the metering opening 13 controlling valve needle 14, which is guided over the closing head 15 in the valve seat body 11, a valve needle 14 acting on the valve closing spring 16, the closing the metering opening 13 presses the closing head 15 onto the valve seat 12, and a solenoid valve 17 actuating the valve needle 14 against the closing or spring force of the valve closing spring 16. The electromagnet 17 has in a known manner an inner pole 18, an outer pole 19 with an amagnetic separation region 20 to the inner pole 18 and a seated on the valve needle 14, with the inner pole 18 a working air gap 21 of the electromagnet 17 limiting armature 22. In the illustrated embodiment, the outer pole 19 of a cup-shaped magnet housing 23, the inner pole 18 of a hollow cylindrical magnetic core 24 and the non-magnetic separation region 20 formed by a separate separator ring 25, the front side of the pot bottom of the magnet housing 23 rests and the hollow cylindrical magnetic core 24 axially overlaps. In the magnet housing 23 is a magnetic coil 26, consisting of a voltage applied to the separator ring 25 coil carrier 27 and wound on the bobbin 27 exciter winding 28, was added. Above the pot opening of the magnet housing 23, a magnetic yoke 29 is produced from the magnet housing 23 to the magnet core 24. The excitation winding 28 of the magnetic coil 26 is connected via contact strips 30 with an electrical connector 31. On the hollow cylindrical magnetic core 24, a hollow cylindrical connecting piece 32 is stumped coaxially, in which a fluid inlet 33 is formed. The connecting piece 32, a part of the magnetic core 24 and the electrical connector 31 are integrated into a plastic casing 34, which partially overlaps the magnet housing 23 axially. The magnet housing 23 is provided with a stepped pot bottom, and a valve sleeve 35 connects the valve seat body 11 with the smallest in diameter portion of the pot bottom. The coaxial in the valve sleeve 35 extending, hollow cylindrical valve needle 14 protrudes into the hollow cylindrical magnetic core 24 and is open at the front. In the magnetic core 24, the valve needle 14 is preceded by a filter 36. The flowing via the fluid inlet 33 into the valve fluid enters radially into the filter 36 and axially from the filter 36 and flows through the hollow valve needle 14 and radial holes 37 of the valve needle 14 in the region of the valve sleeve 35 to the orifice 13, so that the Closing head 15 is acted upon by the pressurized fluid. The valve closing spring 16 is arranged in the interior of the hollow cylindrical magnetic core 24, is seated on the valve needle 14 and axially supported on the one hand on the valve needle 14 and on the other hand on the firmly pressed into the magnetic core 24 filter 36 from which at the same time an adjusting element for adjusting the closing force of the valve closing spring 16 forms.

Zur Verbesserung der Öffnungsdynamik des Ventils ist eine Vorrichtung zum Erzeugen eines Ankervorhubs oder eines Ankerfreiwegs vorgesehen. Die Vorrichtung umfasst einen an der Ventilnadel 14 fest angeordneten Ankeranschlag 38 und eine den Anker 22 in Richtung Ankeranschlag 38 beaufschlagende Vorhubfeder 39, die zur Verkürzung der axialen Baulänge des Ventils innerhalb des Ankers 22 auf der Ventilnadel 14 angeordnet ist. Um wegen der dadurch verkürzten axialen Führung des Ankers 22 auf der Ventilnadel 14 der Gefahr eines Verkippens des Ankers 22 auf der Ventilnadel 14 zu begegnen, ist der in Figur 2 in vergrößerter Schnittdarstellung und in Figur 3 in vergößerter Unteransicht zu sehende Anker 22 axial in eine Ankerführungsscheibe 221 und in einen Ankerring 222 unterteilt. Die Ankerführungsscheibe 221 ist fest mit der Ventilnadel 14 verbunden und begrenzt mit ihrer innenpolseitigen Ringfläche den Arbeitsluftspalt 21 des Elektromagneten 17. Die Ankerführungsscheibe 221 ist axial verschieblich im amagnetischen Trennbereich 20 des Außenpols 19, also im Trennring 25, geführt und weist hierzu am Außenumfang mehrere winkelversetzte Führungsflächen 221 a auf (Figur 3). Der Ankerring 222 sitzt axial verschieblich auf der Ventilnadel 14 zwischen Ankerführungsscheibe 221 und Ankeranschlag 38. Sein den Ankerfreiweg oder-vorhub 41 bildender Verschiebeweg auf der Ventilnadel 14 ist einerseits durch den Ankeranschlag 38 und andererseits durch die Ankerführungsscheibe 221 begrenzt. Der Ankerring 222 ist so positioniert, dass ein radialer Magnetfluss zwischen Außenpol 19 bzw. Magnetgehäuse 23 und dem Ankerring 222 sichergestellt ist. Der Außendurchmesser des Ankerrings 222 ist so gewählt, dass bei dessen Verschiebung ein mechanischer Kontakt zum Außenpol 19 bzw. Magnetgehäuse 23 ausgeschlossen ist. Der Ankerring 222 weist einen axial kürzeren ersten Ringabschnitt 222a mit kleinerem Innendurchmesser und einen axial längeren zweiten Ringabschnitt 222b mit größerem Innendurchmesser auf. Aufgrund dieser Durchmesserdifferenz ist am ersten Ringabschnitt 222a ein über die Innenwand des zweiten Ringabschnitts 222b radial überstehender, einstückiger Führungsbund vorhanden. Das in Figur 2 für eine später beschriebene Modifikation des Ankers 22 dargestellte und mit 40 bezeichnete Bauteil stellt in diesem Zusammenhang diesen Führungsbund dar, der im übrigen in Figur 1 als einstückiger Bestandteil des Ankerrings 22 zu erkennen ist. Mit dem Führungsbund am ersten Ringabschnitt 222a ist der Ankerring 222 auf der Ventilnadel 14 axial verschieblich geführt. Der zweite Ringabschnitt 222b umschließt aufgrund seines größeren Innendurchmessers die auf der Ventilnadel 14 sitztende Vorhubfeder 39 mit radialem Abstand. Die Vorhubfeder 39 stützt sich einerseits an der Ankerführungsscheibe 221, und damit an der Ventilnadel 14, und andererseits am Ankerring 222 ab, wobei die ankerringseitige Abstützung an dem Führungsbund, und zwar an dessen ringförmigen Stirnfläche, vorgenommen ist.To improve the opening dynamics of the valve, a device for generating an Ankervorhubs or an armature free travel is provided. The device comprises a fixed to the valve needle 14 anchor stopper 38 and an armature 22 in the direction of anchor stop 38 acting on Vorhubfeder 39, which is arranged to shorten the axial length of the valve within the armature 22 on the valve needle 14. In order to counteract the risk of tilting of the armature 22 on the valve needle 14 due to the thus shortened axial guidance of the armature 22 on the valve needle 14, the in FIG. 2 in enlarged sectional view and in FIG. 3 In an enlarged lower view to be seen anchor 22 axially divided into an armature guide disc 221 and an anchor ring 222. The armature guide disc 221 is fixedly connected to the valve needle 14 and limited with its inner pole side annular surface the working air gap 21 of the electromagnet 17. The armature guide disc 221 is axially displaceable in the non-magnetic separation region 20 of the outer pole 19, ie in the separator ring 25, and has this on the outer circumference a plurality of angular offset Guide surfaces 221 a on ( FIG. 3 ). The armature ring 222 is seated axially displaceable on the valve needle 14 between the armature guide disc 221 and armature stop 38. Its the Ankerfreiweg or -vorhub 41 forming displacement on the valve needle 14 is limited on the one hand by the armature stopper 38 and on the other hand by the armature guide disc 221. The armature ring 222 is positioned so that a radial magnetic flux between the outer pole 19 and the magnet housing 23 and the anchor ring 222 is ensured. The outer diameter of the anchor ring 222 is selected so that its Displacement of a mechanical contact with the outer pole 19 or magnet housing 23 is excluded. The anchor ring 222 has an axially shorter first ring portion 222a with a smaller inner diameter and an axially longer second ring portion 222b with a larger inner diameter. Because of this difference in diameter, a one-piece guide collar radially projecting beyond the inner wall of the second annular section 222b is present on the first annular section 222a. This in FIG. 2 for a later described modification of the armature 22 shown and designated 40 component represents in this context this guide collar, which in the rest in FIG. 1 can be seen as an integral part of the anchor ring 22. With the guide collar on the first ring portion 222a of the anchor ring 222 is guided on the valve needle 14 axially displaceable. The second ring portion 222b encloses due to its larger inner diameter which sits on the valve needle 14 Vorhubfeder 39 with a radial distance. The Vorhubfeder 39 is supported on the one hand on the armature guide plate 221, and thus on the valve needle 14, and on the other hand on the anchor ring 222, wherein the ankerringseitige support on the guide collar, on its annular end face made.

Die Ventilnadel 14 ist vorzugsweise amagnetisch, besteht also aus einem magnetisch nicht oder nur schlecht leitenden Werkstoff. Ist die Ventilnadel 14 magnetisch, besteht also aus einem magnetisch gut leitenden Werkstoff, so ist in der Ventilnadel 14 ein Nadelabschnitt amagnetisch ausgebildet, der sich über den ersten Ringabschnitt 222a erstreckt. Dieser amagnetische Nadelabschnitt sorgt für eine magnetische Trennung zwischen Ankerring 222 und Ventilnadel 14.The valve needle 14 is preferably non-magnetic, so it consists of a magnetically not or only poorly conductive material. If the valve needle 14 is magnetic, that is, if it consists of a magnetically highly conductive material, a needle section is formed in the valve needle 14 in an amagnetic manner, which extends over the first ring section 222a. This non-magnetic needle section provides a magnetic separation between anchor ring 222 and valve needle 14.

Alternativ kann bei einer Ventilnadel 14 aus magnetischem Werkstoff die magnetische Trennung von Ventilnadel 14 und Anker 22 in den Ankerring 222 verlegt werden. Hierzu weist der auf der Ventilnadel 14 sitzende Führungsbund des ersten Ringabschnitts 222a einen großen magnetischen Widerstand auf. Dies ist in einer in Figur 2 dargestellten Modifizierung des Ankers 22 fertigungstechnisch vorteilhaft dadurch realisiert, dass der Führungsbund durch eine separate Führungsbuchse 40 aus einem magnetisch nicht oder nur schlecht leitenden Werkstoff ersetzt ist, die fest mit dem Ankerring 222 verbunden ist. Vorteilhaft ist dazu der Innendurchmesser des ersten Ringabschnitts 222a gleich dem Innendurchmesser des zweiten Ringabschnitts 222b gemacht und die Führungshülse 40 zwischen dem ersten Ringabschnitts 222a und der Ventilnadel 14 angeordnet. Die Führungshülse 40 übernimmt die Führung des Ankerrings 222 auf der Ventilnadel 14 und mit ihrer ringförmigen Stirnfläche die ankerringseitige Abstützung der Vorhubfeder 39.Alternatively, in the case of a valve needle 14 of magnetic material, the magnetic separation of valve needle 14 and armature 22 can be laid in the anchor ring 222. For this purpose, the seated on the valve needle 14 guide collar of the first ring portion 222a has a large magnetic resistance. This is in an in FIG. 2 illustrated modification of the armature 22 manufacturing technology advantageously realized by the fact that the guide collar is replaced by a separate guide bush 40 made of a magnetically non or poorly conductive material, which is firmly connected to the anchor ring 222. Advantageously, the inner diameter of the first ring portion 222a is the same the inner diameter of the second ring portion 222 b made and the guide sleeve 40 between the first ring portion 222 a and the valve needle 14 is arranged. The guide sleeve 40 assumes the leadership of the anchor ring 222 on the valve needle 14 and with its annular end face the ankerringseitige support the Vorhubfeder 39th

Im unbestromten Zustand des Elektromagneten 17 ist der Schließkopf 15 von der die Ventilnadel 14 über die mit der Ventilnadel 14 fest verbundene Ankerführungsscheibe 221 beaufschlagenden Ventilschließfeder 16 auf den Ventilsitz 12 aufgedrückt und somit die Zumessöffnung 13 verschlossen. Zwischen der Ankerführungsscheibe 221 und dem Innenpol 18 bzw. dem Magnetkern 24 besteht der Arbeitsluftspalt 21des Elektromagneten 17. Der Ankerring 222 ist durch die Vorhubfeder 39 an den Ankeranschlag 38 angelegt, wobei sich zwischen der Ankerführungsscheibe 221 und dem Ankerring 22 ein dem Ankerfreiweg oder -vorhub 41 darstellender axialer Spalt einstellt.In the de-energized state of the electromagnet 17 of the closing head 15 is pressed by the valve needle 14 via the valve needle 14 firmly connected armature guide disc 221 acting on the valve closing spring 16 on the valve seat 12 and thus closed the metering orifice 13. Between the armature guide disc 221 and the inner pole 18 and the magnetic core 24 is the working air gap 21 of the electromagnet 17. The anchor ring 222 is applied by the Vorhubfeder 39 to the armature stop 38, wherein between the armature guide disc 221 and the anchor ring 22 a Ankerfreiweg or -vorhub 41 representing axial gap adjusts.

Wird der Elektromagnet 17 bestromt, so bleibt die Ankerführungsscheibe 221 durch die Druckkraft der Ventilschließfeder 16 in der beschriebenen Position. Der Ankerring 222 wird durch die Magnetkraft in Richtung Ankerführungsscheibe 221 beschleunigt. Erreicht der Ankerring 222 die Ankerführungsscheibe 221, überträgt er seinen mechanischen Impuls auf die Ankerführungsscheibe 221 und damit auf die Ventilnadel 14, so dass der Schließkopf 15 beginnt, von dem Ventilsitz 12 abzuheben. Ankerring 222, Ankerführungsscheibe 221 und Ventilnadel 14 bewegen sich gemeinsam, bis die Ankerführungsscheibe 221 den Innenpol 18 bzw. Magnetkern 24 erreicht. Das Ventil ist voll geöffnet. Bei Wegfall der Bestromung der Magnetspule 26 schiebt die Ventilschließfeder 16 die Ventilnadel 14 mit Anker 22 zurück, bis der Schließkopf 15 sich auf den Ventilsitz 12 aufpresst und die Zumessöffnung 13 verschließt. Die Vorhubfeder 39 drückt den Ankerring 222 gegen den Ankeranschlag 38 und stellt zwischen Ankerring 222 und Ankerführungsscheibe 221 den Spalt für den Ankerfreiweg oder -vorhub 41 wieder ein.If the solenoid 17 is energized, the armature guide plate 221 remains in the position described by the pressure force of the valve closing spring 16. The armature ring 222 is accelerated by the magnetic force in the direction of armature guide plate 221. When the anchor ring 222 reaches the armature guide disk 221, it transmits its mechanical impulse to the armature guide disk 221 and thus to the valve needle 14, so that the closing head 15 begins to lift off the valve seat 12. Anchor ring 222, armature guide disc 221 and valve needle 14 move together until the armature guide disc 221 reaches the inner pole 18 or magnetic core 24. The valve is fully open. In the absence of energization of the solenoid 26, the valve closing spring 16 pushes the valve needle 14 back with armature 22 until the closing head 15 presses on the valve seat 12 and the metering opening 13 closes. The Vorhubfeder 39 presses the anchor ring 222 against the anchor stop 38 and is between the anchor ring 222 and armature guide plate 221, the gap for the Ankerfreiweg or -vorhub 41 again.

Claims (8)

  1. Valve for metering fluid, having a metering opening (13) formed in a valve seat body (11), having an axially displaceable valve needle (14) which controls the metering opening (13) by means of a closing head (15) and which is guided by means of the closing head (15) in the valve seat body (11), having an electromagnet (17) which actuates the valve needle (14) counter to the closing force of a valve closing spring (16) and which has an inner pole (18), an outer pole (19) with an amagnetic separating region (20) with respect to the inner pole (18), and an armature (22) which is seated on the valve needle (14) and which, together with the inner pole (18), delimits a working air gap (21) of the electromagnet (17), and having a device for generating an armature pre-stroke, which device has an armature stop (38) fixedly arranged on the valve needle (14) and a pre-stroke spring (39) which acts on the armature (22) in the direction of the armature stop (38), wherein the armature (22) is divided into an armature guide disc (221), which is fixedly connected to the valve needle (14) and which, at its disc circumference, is guided in axially displaceable fashion in the amagnetic separating region (20) and which, with its ring-shaped disc surface, delimits the working air gap (21), and an armature ring (222), which is arranged between armature guide disc (221) and armature stop (38) and which has a first ring section (222a) and a second ring section (222b), and wherein the armature ring (222) is guided in axially displaceable fashion with the first ring section (222a) on the valve needle (14), and the pre-stroke spring (39) is arranged on the valve needle (14) in the second ring section (222b) and is axially supported on the armature ring (222) and on the armature guide disc (221),
    characterized in that, on the circumference of the armature guide disc (221), there are formed multiple angularly offset guide surfaces (221a) which extend over a tangential angle segment.
  2. Valve according to Claim 1, characterized in that the valve needle (14) is composed of a magnetic material and, in the first ring section (222a) of the armature ring (222), between the armature ring (222) and the valve needle (14), there is arranged a guide bushing (40) which is guided in sliding fashion on the valve needle (14) and which is fixedly connected to the armature ring (222) and which is composed of an amagnetic material.
  3. Valve according to Claim 2, characterized in that the pre-stroke spring (39) is supported at the armature ring side on the guide bushing (40).
  4. Valve according to Claim 1, characterized in that the valve needle (14) is composed of an amagnetic material or has at least one needle section composed of an amagnetic material which extends over the first ring section (222a) of the armature ring (222), and in that the first ring section (222a) has an integrally formed guide collar which projects radially beyond the inner wall of the second ring section (222b) and which is guided in sliding fashion on the valve needle (14).
  5. Valve according to Claim 4, characterized in that the pre-stroke spring (39) is supported at the armature ring side on the guide collar.
  6. Valve according to one of Claims 1 to 5, characterized in that the outer pole (19) is formed by a pot-shaped magnet housing (23), the inner pole (18) is formed by a hollow cylindrical magnet core (24), and the amagnetic separating region (20) is formed by a separating ring (25) which is mounted at a face side on the magnet housing (23) and which engages over the inner pole (18), and in that, on the separating ring (25), there is fixedly arranged a magnet coil (26) which is accommodated in the magnet housing (23).
  7. Valve according to Claim 6, characterized in that the valve closing spring (16) is arranged in the hollow cylindrical magnet core (24), which valve closing spring is supported axially on an adjustment element, which is inserted fixedly in the magnet core (24), and on the armature guide disc (221).
  8. Valve according to one of Claims 1 to 7, characterized in that the valve needle (14) is of hollow form and is open towards a fluid inlet (33) and has radial bores (37) downstream of the armature stop (38), and in that the valve seat body (11) is fixedly connected to the magnet housing (36) by means of a valve sleeve (35) which surrounds the valve needle (14) with a radial spacing.
EP14183692.4A 2013-11-07 2014-09-05 Valve for measuring out fluid Not-in-force EP2871352B1 (en)

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DE102013222590.3A DE102013222590A1 (en) 2013-11-07 2013-11-07 Valve for metering fluid

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CN114198509B (en) * 2021-11-19 2024-09-20 宜兴利合机械科技有限公司 Electric control valve capable of being quickly opened and closed
DE102022131385A1 (en) * 2022-11-28 2024-05-29 Liebherr-Components Deggendorf Gmbh Injector for injecting fuel
CN117262297B (en) * 2023-11-22 2024-01-30 山东东源新材料科技有限公司 Split charging device and split charging method for desulfurization and denitrification catalyst

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DE10004960A1 (en) * 2000-02-04 2001-08-09 Bosch Gmbh Robert Fuel injection valve for IC engine fuel injection system has 2 magnetic coils providing opening and closing forces acting on 2 magnetic armatures
DE10108945A1 (en) 2001-02-24 2002-09-05 Bosch Gmbh Robert Fuel injector
DE602005009384D1 (en) * 2005-12-23 2008-10-09 Delphi Tech Inc fuel injector
EP2236807B1 (en) * 2009-03-23 2016-05-11 Continental Automotive GmbH Fluid injector
JP5488120B2 (en) * 2010-03-30 2014-05-14 株式会社デンソー Fuel injection valve
EP2444651B1 (en) * 2010-10-19 2013-07-10 Continental Automotive GmbH Valve assembly for an injection valve and injection valve

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