EP3172428B1 - Electromagnetic actuating unit for a suction valve and a suction valve - Google Patents

Electromagnetic actuating unit for a suction valve and a suction valve Download PDF

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Publication number
EP3172428B1
EP3172428B1 EP15727376.4A EP15727376A EP3172428B1 EP 3172428 B1 EP3172428 B1 EP 3172428B1 EP 15727376 A EP15727376 A EP 15727376A EP 3172428 B1 EP3172428 B1 EP 3172428B1
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EP
European Patent Office
Prior art keywords
armature
guide
actuating unit
unit according
electromagnet
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
EP15727376.4A
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German (de)
French (fr)
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EP3172428A1 (en
Inventor
Achim Meisiek
Tobias Landenberger
Hans Heber
Stefan Kolb
Michael IMHOF
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP3172428A1 publication Critical patent/EP3172428A1/en
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Publication of EP3172428B1 publication Critical patent/EP3172428B1/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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/07—Fuel-injection apparatus having means for avoiding sticking of valve or armature, e.g. preventing hydraulic or magnetic sticking of parts
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • F02M2200/9069—Non-magnetic metals
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring

Definitions

  • the invention relates to an electromagnetic actuator for a suction valve for supplying a high-pressure fuel pump, in particular a common-rail high-pressure pump, with fuel, wherein the electromagnetic actuator comprises the features of the preamble of claim 1. Furthermore, the invention relates to a suction valve with such an electromagnetic actuator.
  • a high-pressure pump for fuel injection systems of air-compressing, self-igniting internal combustion engines with an electromagnetically controllable intake valve for the metering of fuel known.
  • an electromagnetic actuator which comprises an annular solenoid and a cooperating with the solenoid, formed as a flat armature anchor, which limits a formed between the armature and the electromagnet axial working air gap and in the axial direction next to the Electromagnet is arranged.
  • the armature is guided axially displaceably in an armature guide, which surrounds the outer peripheral region of the armature.
  • the anchor guide also serves to support the anchor.
  • a residual air gap disc is provided, which is designed as a separate part. This causes a large manufacturing and assembly costs.
  • a high-pressure pump for fuel injection systems of air-compressing, self-igniting internal combustion engines with an electromagnetically controllable intake valve for the metering of fuel is known.
  • a full or partial filling of a pump working chamber of the high-pressure pump with fuel can be realized via the suction or inlet valve.
  • US7451741 B1 discloses another electromagnetic actuator with an armature guided on its outer periphery.
  • the present invention has for its object to provide an electromagnetic actuator for a suction valve for supplying a high-pressure fuel pump, in particular a common rail high-pressure pump, with fuel specify that is very compact and easy and inexpensive to produce.
  • the electromagnetic actuator is proposed with the features of claim 1.
  • Advantageous developments of the invention can be found in the dependent claims.
  • a suction valve is specified with such an electromagnetic actuator.
  • the proposed for a suction valve electromagnetic actuator comprises an electromagnet and an armature, which is axially slidably guided in an armature guide, which surrounds an outer peripheral region of the armature.
  • the armature guide also serves to support the armature, wherein the armature is designed as a flat armature, which limits a formed between the armature and the electromagnet axial working air gap.
  • the armature guide has a radially extending collar portion extending into the working air gap between the armature and the electromagnet extends. That is, the collar portion of the anchor guide extends radially inward.
  • the anchor guide may be formed, for example, substantially pot-shaped.
  • the armature guide can replace in this way a usually arranged between the armature and the electromagnet residual air gap disc. As a result, the number of components is reduced, which in turn has a favorable effect on the manufacturing costs.
  • the armature guide is a separate component, which is at least partially sleeve-shaped and preferably extends over the entire height of the armature.
  • the armature guide has a radially extending collar section which extends into the working air gap between the armature and the electromagnet. That is, the collar portion of the anchor guide extends radially inward.
  • the anchor guide may be formed, for example, substantially pot-shaped. The armature guide can replace in this way a usually arranged between the armature and the electromagnet residual air gap disc. As a result, the number of components is further reduced, which in turn has a favorable effect on the manufacturing costs.
  • the armature guide forms a stroke stop for the armature. This means that the stroke of the armature or its displacement in the axial direction is limited by the armature guide.
  • the formation of the stroke stop is preferably carried out via a radially extending collar portion of the armature guide, which extends into the working air gap.
  • the armature guide can also be designed in several parts and have a sleeve-shaped first part and a disk-shaped second part for forming the stroke stop.
  • the armature guide is wholly or partly made of a non-magnetic material. This applies in particular to the radially extending collar section extending into the working air gap or the disk-shaped second part of the armature guide. Because then the anchor guide can also be used for magnetic separation of the armature from the electromagnet be to counteract a magnetic sticking of the armature to the electromagnet and in this way to improve the dynamics of the actuator.
  • the armature guide has at least one peripheral aperture in the form of a bore and / or a slot.
  • the bore or the slot facilitates a hydraulic compensation with an axial displacement of the armature, so that short switching times can be realized.
  • the venting of the valve is improved via the bore or the slot.
  • a plurality of bores are provided, which are evenly distributed over the circumference and / or arranged at an axial distance from each other.
  • a slot this is preferably designed as a longitudinal slot to form an axially extending flow channel.
  • a longitudinal slot has the advantage that the armature guide is simple and inexpensive to produce from a film material that is rolled into a sleeve.
  • the armature guide has at least one outer and / or inner circumferential groove, preferably a longitudinal groove.
  • These measures should also alone or in combination facilitate the hydraulic compensation with an axial displacement of the armature and thus improve the switching dynamics.
  • longitudinal grooves in turn axially extending flow channels are provided, via which a hydraulic compensation is particularly easy to reach.
  • the electromagnet comprises an annular magnetic coil which is accommodated in a cup-shaped magnetic core.
  • the magnetic core serves to protect the magnetic coil and at the same time forms an annular outer pole and an annular inner pole, which are connected via an annular web.
  • the pot-shaped magnetic core is therefore preferably open only to one side, so that on this side, the magnetic coil can be inserted into the magnetic core.
  • the unilaterally open magnetic core is oriented such that the working air gap between the magnetic core and the armature is formed. That is, the open side is preferably the side away from the anchor. The solenoid is protected in this way by the magnetic core against contact with fuel.
  • the anchor guide a radially extending collar portion or a disc-shaped second part as a substitute for one between the anchor and the electromagnet disposed residual air gap disc, this or this comes to rest between the magnetic core and the armature.
  • the armature guide in this case serves as the magnetic separation between the armature and the magnetic core to reduce magnetic sticking of the armature to the magnetic core when the solenoid is energized and the armature moves in the direction of the solenoid to reduce the axial working air gap.
  • the armature is acted upon by the spring force of a spring.
  • the spring serves to return the armature to its initial position when the energization of the solenoid is terminated.
  • the spring is designed as a helical compression spring.
  • the spring pass through the armature guide, in particular the radially extending collar section extending into the axial working air gap, or the disk-shaped second part of the armature guide arranged there. Because then the spring can be supported directly or indirectly, for example via a shim on the anchor.
  • a particularly compact design of the invention is achieved when the electromagnet and / or the armature guide are received in an axial bore of a screw plug, via which a valve body of the suction valve in a housing part of the high-pressure fuel pump is fixed.
  • a separate housing part for the electromagnetic actuator can be omitted in this way.
  • the axial bore of the screw plug is designed stepped in order to achieve via a step support of the electromagnet and / or the armature guide in the axial direction.
  • the further proposed suction valve for supplying a high-pressure fuel pump, in particular a common-rail high-pressure pump, with fuel comprises an electromagnetic actuator according to the invention, wherein the armature is coupled or can be coupled to a valve piston, which has a sealing contour cooperating with a sealing seat.
  • the coupling causes the armature entrains the valve piston during an axial displacement.
  • the sealing contour is preferably formed on a plate-shaped portion of the valve piston, so that the valve piston also serves as a valve closing element.
  • suction valve comprises an axially displaceable valve piston 17 with a plate-shaped portion 19, on which a cooperating with a sealing seat 18 sealing contour is formed.
  • the sealing seat 18 is formed in a valve body 15, which is received in a bore 26 of a housing part 16 of a high-pressure fuel pump and fixed in position via a locking screw 14.
  • the valve piston 17 passes through the valve body 15 and has a portion lying outside of the valve body 15 which is surrounded by a spring plate 24 for supporting a valve spring 25. About the spring force of the valve spring 25, the valve piston 17 is acted upon in the closing direction.
  • an electromagnetic actuating unit for actuating the suction valve, an electromagnetic actuating unit is provided which comprises an electromagnet 1 and an axially displaceable armature 2, which is coupled to the valve piston 17.
  • the armature 2 is designed as a flat armature and limits the end face an axial working air gap 4, which is formed between the electromagnet 1 and the armature 2.
  • the armature 2 is arranged in the axial direction next to the electromagnet 1.
  • the electromagnet 1 comprises an annular magnetic coil 10 and a cup-shaped magnetic core 11, in which the magnetic coil 10 is accommodated.
  • a stroke stop 6 which in the present case is formed on an inventively provided radially extending collar portion 5 of a sleeve-shaped anchor guide 3, which surrounds the armature 2.
  • a spring 12 is provided, which passes through the collar portion 5 of the armature guide.
  • the armature guide 3 surrounding the armature 2 serves primarily to guide and support the armature 2.
  • the armature guide 3 is thus able to replace a central armature bolt, which usually serves to guide and / or support the armature 2.
  • the armature guide is in the present case made of a non-magnetic material, so that at the same time a magnetic separation of the armature 2 from the electromagnet 1 is effected at the same time.
  • the armature guide 3 thus counteracts a magnetic bonding of the armature 2 to the electromagnet 1, whereby the switching dynamics is improved.
  • FIGS. 2 to 6 Preferred embodiments of an armature guide 3 for an electromagnetic actuator according to the invention are the FIGS. 2 to 6 refer to.
  • the armature guide 3 may be formed as a slotted sleeve.
  • This embodiment of an armature guide 3 is particularly simple and therefore inexpensive to manufacture. Because it can be used a film material that is rolled into a sleeve. The case opposite longitudinal edges of the film form an axially extending slot 8, at the same time as Flow channel is used to provide the necessary hydraulic compensation in an axial displacement of the armature 2.
  • an alternative embodiment of an armature guide 3 is in the Fig. 3 shown.
  • the armature guide 3 is cup-shaped, wherein the inventively provided radially extending collar portion 5 for forming the stroke stop 6, a central recess for the passage of the spring 12 is limited.
  • the armature guide 3 has no slot 8, it is preferable to provide at least one bore 7, via which a hydraulic compensation and / or a ventilation can be effected.
  • a sleeve-shaped armature guide 3 with a plurality of holes 7 is exemplary in the FIG. 4 shown.
  • the armature guide 3 could also be designed cup-shaped according to the invention.
  • FIGS. 5 and 6 each have a plurality of longitudinal grooves 9, the outer peripheral side ( Fig. 5 ) or inside peripheral side ( Fig. 6 ) are formed on a sleeve or cup-shaped anchor guide 3.
  • the grooves 9 serve as flow channels to provide the necessary hydraulic compensation with an axial displacement of the armature 2.
  • the armature guide 3 of an electromagnetic actuator according to the invention is preferably - as in the FIG. 1 shown - taken directly into an axial bore 13 of the screw 14, so that the actuator and thus the suction valve in the axial and radial direction can be made very compact design.
  • the solenoid 1 is further used, wherein for the protection of the electromagnet 1, an encapsulation 20, the axial bore 13 seals to the outside.
  • the encapsulation 20 also forms a plug connection 22 for the electrical connection of the magnetic coil 10.
  • a coil wire end 21 of the magnetic coil 10 is guided for this purpose up to a contact pin 23 of the connector terminal 22.

Description

Die Erfindung betrifft eine elektromagnetische Stelleinheit für ein Saugventil zur Versorgung einer Kraftstoffhochdruckpumpe, insbesondere einer Common-Rail-Hochdruckpumpe, mit Kraftstoff, wobei die elektromagnetische Stelleinheit die Merkmale des Oberbegriffs des Anspruchs 1 umfasst. Ferner betrifft die Erfindung ein Saugventil mit einer solchen elektromagnetischen Stelleinheit.The invention relates to an electromagnetic actuator for a suction valve for supplying a high-pressure fuel pump, in particular a common-rail high-pressure pump, with fuel, wherein the electromagnetic actuator comprises the features of the preamble of claim 1. Furthermore, the invention relates to a suction valve with such an electromagnetic actuator.

Stand der TechnikState of the art

Aus der EP 2 703 625 A1 ist eine Hochdruckpumpe für Brennstoffeinspritzanlagen von luftverdichtenden, selbstzündenden Brennkraftmaschinen mit einem elektromagnetisch ansteuerbaren Saug- bzw. Einlassventil für die Zumessung von Brennstoff bekannt. In Abhängigkeit von dessen Ansteuerung ist über das Saug- bzw. Einlassventil eine Voll- oder Teilbefüllung eines Pumpenarbeitsraums der Hochdruckpumpe mit Brennstoff realisierbar. Die Ansteuerung des Saug- bzw. Einlassventils erfolgt über eine elektromagnetische Stelleinheit, die eine ringförmige Magnetspule und einen mit der Magnetspule zusammenwirkenden, als Flachanker ausgebildeten Anker umfasst, der einen zwischen dem Anker und dem Elektromagneten ausgebildeten axialen Arbeitsluftspalt begrenzt und der in axialer Richtung neben dem Elektromagneten angeordnet ist. Der Anker ist in einer Ankerführung axial verschiebbar geführt, die den Außenumfangsbereich des Ankers umgibt. Die Ankerführung dient zugleich der Lagerung des Ankers. Zur Sicherstellung eines Restluftspalts zwischen dem Anker und dem Elektromagneten ist üblicherweise eine Restluftspaltscheibe vorgesehen, die als separates Teil ausgeführt ist. Hierdurch wird ein großer Fertigungs- und Montageaufwand verursacht.From the EP 2 703 625 A1 is a high-pressure pump for fuel injection systems of air-compressing, self-igniting internal combustion engines with an electromagnetically controllable intake valve for the metering of fuel known. Depending on its activation, a full or partial filling of a pump working chamber of the high-pressure pump with fuel can be realized via the suction or inlet valve. The control of the suction or inlet valve via an electromagnetic actuator, which comprises an annular solenoid and a cooperating with the solenoid, formed as a flat armature anchor, which limits a formed between the armature and the electromagnet axial working air gap and in the axial direction next to the Electromagnet is arranged. The armature is guided axially displaceably in an armature guide, which surrounds the outer peripheral region of the armature. The anchor guide also serves to support the anchor. To ensure a residual air gap between the armature and the electromagnet usually a residual air gap disc is provided, which is designed as a separate part. This causes a large manufacturing and assembly costs.

Durch die JP 3 598610 B2 ist ferner eine Hochdruckpumpe für Brennstoffeinspritzanlagen von luftverdichtenden, selbstzündenden Brennkraftmaschinen mit einem elektromagnetisch ansteuerbaren Saug- bzw. Einlassventil für die Zumessung von Brennstoff bekannt. In Abhängigkeit von dessen Ansteuerung ist über das Saug- bzw. Einlassventil eine Voll- oder Teilbefüllung eines Pumpenarbeitsraums der Hochdruckpumpe mit Brennstoff realisierbar. Die Ansteuerung des Saug- bzw. Einlassventils erfolgt über eine elektromagnetische Stelleinheit, die eine ringförmige Magnetspule und einen mit der Magnetspule zusammenwirkenden, als Flachanker ausgebildeten Anker umfasst, einen zwischen dem Anker und dem Elektromagneten ausgebildeten axialen Arbeitsluftspalt begrenzt und der in axialer Richtung neben dem Elektromagneten angeordnet ist. Der Anker ist mit einem Ankerbolzen verbunden, der in einer Bohrung eines Ventilgehäuses axial verschiebbar geführt und gelagert ist. Maßnahmen zur Sicherstellung eines Restluftspalts zwischen dem Anker und dem Elektromagneten sind bei dieser Hochdruckpumpe nicht vorgesehen. US7451741 B1 offenbart eine weitere elektromagnetische Stelleinheit mit einem Anker, der am seinem Außenumfang geführt ist. Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine elektromagnetische Stelleinheit für ein Saugventil zur Versorgung einer Kraftstoffhochdruckpumpe, insbesondere einer Common-Rail-Hochdruckpumpe, mit Kraftstoff, anzugeben, die besonders kompakt bauend sowie einfach und kostengünstig herstellbar ist.By the JP 3 598610 B2 Furthermore, a high-pressure pump for fuel injection systems of air-compressing, self-igniting internal combustion engines with an electromagnetically controllable intake valve for the metering of fuel is known. Depending on its activation, a full or partial filling of a pump working chamber of the high-pressure pump with fuel can be realized via the suction or inlet valve. The control of the suction or inlet valve via an electromagnetic actuator, which includes an annular solenoid and a cooperating with the solenoid, formed as a flat armature anchor limits a formed between the armature and the electromagnet axial working air gap and in the axial direction next to the electromagnet is arranged. The armature is connected to an anchor bolt, which is axially displaceably guided and supported in a bore of a valve housing. Measures to ensure a residual air gap between the armature and the electromagnet are not provided in this high-pressure pump. US7451741 B1 discloses another electromagnetic actuator with an armature guided on its outer periphery. The present invention has for its object to provide an electromagnetic actuator for a suction valve for supplying a high-pressure fuel pump, in particular a common rail high-pressure pump, with fuel specify that is very compact and easy and inexpensive to produce.

Zur Lösung der Aufgabe wird die elektromagnetische Stelleinheit mit den Merkmalen des Anspruchs 1 vorgeschlagen. Vorteilhafte Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen. Ferner wird ein Saugventil mit einer solchen elektromagnetischen Stelleinheit angegeben.To solve the problem, the electromagnetic actuator is proposed with the features of claim 1. Advantageous developments of the invention can be found in the dependent claims. Furthermore, a suction valve is specified with such an electromagnetic actuator.

Offenbarung der ErfindungDisclosure of the invention

Die für ein Saugventil vorgeschlagene elektromagnetische Stelleinheit umfasst einen Elektromagneten und einen Anker, der in einer Ankerführung, welche einen Außenumfangsbereich des Ankers umgibt, axial verschiebbar geführt ist. Die Ankerführung dient zugleich der Lagerung des Ankers, wobei der Anker als Flachanker ausgeführt ist, der einen zwischen dem Anker und dem Elektromagneten ausgebildeten axialen Arbeitsluftspalt begrenzt. Die Ankerführung besitzt einen radial verlaufenden Bundabschnitt, der sich in den Arbeitsluftspalt zwischen dem Anker und dem Elektromagneten hinein erstreckt. Das heißt, dass sich der Bundabschnitt der Ankerführung nach radial innen erstreckt. Zur Realisierung eines solchen Bundabschnitts kann die Ankerführung beispielsweise im Wesentlichen topfförmig ausgebildet sein. Die Ankerführung vermag auf diese Weise eine üblicherweise zwischen dem Anker und dem Elektromagneten angeordnete Restluftspaltscheibe zu ersetzen. Dadurch wird die Anzahl der Bauteile verringert, was sich wiederum günstig auf die Herstellungskosten auswirkt.The proposed for a suction valve electromagnetic actuator comprises an electromagnet and an armature, which is axially slidably guided in an armature guide, which surrounds an outer peripheral region of the armature. The armature guide also serves to support the armature, wherein the armature is designed as a flat armature, which limits a formed between the armature and the electromagnet axial working air gap. The armature guide has a radially extending collar portion extending into the working air gap between the armature and the electromagnet extends. That is, the collar portion of the anchor guide extends radially inward. To realize such a collar portion, the anchor guide may be formed, for example, substantially pot-shaped. The armature guide can replace in this way a usually arranged between the armature and the electromagnet residual air gap disc. As a result, the number of components is reduced, which in turn has a favorable effect on the manufacturing costs.

Bevorzugt ist die Ankerführung ein separates Bauteil, das zumindest abschnittsweise hülsenförmig ausgebildet ist und sich vorzugsweise über die gesamte Höhe des Ankers erstreckt. Die Ausbildung als separates Bauteil vereinfacht die Fertigung der Ankerführung, so dass diese mit geringem Spiel ausgelegt werden kann. Erfindungsgemäß besitzt die Ankerführung einen radial verlaufenden Bundabschnitt, der sich in den Arbeitsluftspalt zwischen dem Anker und dem Elektromagneten hinein erstreckt. Das heißt, dass sich der Bundabschnitt der Ankerführung nach radial innen erstreckt. Zur Realisierung eines solchen Bundabschnitts kann die Ankerführung beispielsweise im Wesentlichen topfförmig ausgebildet sein. Die Ankerführung vermag auf diese Weise eine üblicherweise zwischen dem Anker und dem Elektromagneten angeordnete Restluftspaltscheibe zu ersetzen. Dadurch wird die Anzahl der Bauteile weiter verringert, was sich wiederum günstig auf die Herstellungskosten auswirkt.Preferably, the armature guide is a separate component, which is at least partially sleeve-shaped and preferably extends over the entire height of the armature. The training as a separate component simplifies the manufacture of the anchor guide, so that it can be designed with little play. According to the invention, the armature guide has a radially extending collar section which extends into the working air gap between the armature and the electromagnet. That is, the collar portion of the anchor guide extends radially inward. To realize such a collar portion, the anchor guide may be formed, for example, substantially pot-shaped. The armature guide can replace in this way a usually arranged between the armature and the electromagnet residual air gap disc. As a result, the number of components is further reduced, which in turn has a favorable effect on the manufacturing costs.

Vorteilhafterweise bildet die Ankerführung einen Hubanschlag für den Anker aus. Das heißt, dass der Hub des Ankers bzw. dessen Verschiebung in axialer Richtung durch die Ankerführung begrenzt wird. Die Ausbildung des Hubanschlags erfolgt vorzugsweise über einen radial verlaufenden Bundabschnitt der Ankerführung, der sich in den Arbeitsluftspalt hinein erstreckt. Alternativ kann die Ankerführung auch mehrteilig ausgebildet sein und ein hülsenförmiges erstes Teil sowie ein scheibenförmiges zweites Teil zur Ausbildung des Hubanschlags besitzen.Advantageously, the armature guide forms a stroke stop for the armature. This means that the stroke of the armature or its displacement in the axial direction is limited by the armature guide. The formation of the stroke stop is preferably carried out via a radially extending collar portion of the armature guide, which extends into the working air gap. Alternatively, the armature guide can also be designed in several parts and have a sleeve-shaped first part and a disk-shaped second part for forming the stroke stop.

In Weiterbildung der Erfindung wird vorgeschlagen, dass die Ankerführung ganz oder teilweise aus einem nicht magnetischen Material gefertigt ist. Dies gilt insbesondere für den sich in den Arbeitsluftspalt hinein erstreckenden radial verlaufenden Bundabschnitt bzw. das scheibenförmige zweite Teil der Ankerführung. Denn dann kann die Ankerführung zugleich zur magnetischen Trennung des Ankers vom Elektromagneten eingesetzt werden, um einem magnetischen Kleben des Ankers am Elektromagneten entgegen zu wirken und auf diese Weise die Dynamik der Stelleinheit zu verbessern.In a further development of the invention it is proposed that the armature guide is wholly or partly made of a non-magnetic material. This applies in particular to the radially extending collar section extending into the working air gap or the disk-shaped second part of the armature guide. Because then the anchor guide can also be used for magnetic separation of the armature from the electromagnet be to counteract a magnetic sticking of the armature to the electromagnet and in this way to improve the dynamics of the actuator.

Vorteilhafterweise besitzt die Ankerführung mindestens eine umfangseitige Durchbrechung in Form einer Bohrung und/oder eines Schlitzes. Die Bohrung bzw. der Schlitz erleichtert einen hydraulischen Ausgleich bei einer axialen Verschiebung des Ankers, so dass kurze Schaltzeiten realisierbar sind. Zugleich wird über die Bohrung bzw. den Schlitz die Entlüftung des Ventils verbessert. Bevorzugt sind mehrere Bohrungen vorgesehen, die über den Umfang gleichmäßig verteilt und/oder in einem axialen Abstand zueinander angeordnet sind. Im Falle eines Schlitzes ist dieser bevorzugt als Längsschlitz ausgeführt, um einen axial verlaufenden Strömungskanal auszubilden. Ferner besitzt ein Längsschlitz den Vorteil, dass die Ankerführung einfach und kostengünstig aus einem Folienmaterial herstellbar ist, das zu einer Hülse gerollt wird.Advantageously, the armature guide has at least one peripheral aperture in the form of a bore and / or a slot. The bore or the slot facilitates a hydraulic compensation with an axial displacement of the armature, so that short switching times can be realized. At the same time the venting of the valve is improved via the bore or the slot. Preferably, a plurality of bores are provided, which are evenly distributed over the circumference and / or arranged at an axial distance from each other. In the case of a slot this is preferably designed as a longitudinal slot to form an axially extending flow channel. Furthermore, a longitudinal slot has the advantage that the armature guide is simple and inexpensive to produce from a film material that is rolled into a sleeve.

Alternativ oder ergänzend wird vorgeschlagen, dass die Ankerführung mindestens eine außen- und/oder innenumfangseitige Nut, vorzugsweise Längsnut, besitzt. Auch diese Maßnahmen sollen jeweils allein oder in Kombination den hydraulischen Ausgleich bei einer axialen Verschiebung des Ankers erleichtern und somit die Schaltdynamik verbessern. In der bevorzugten Ausgestaltung als Längsnuten werden wiederum axial verlaufende Strömungskanäle geschaffen, über welche ein hydraulischer Ausgleich besonders einfach erreichbar ist.Alternatively or additionally, it is proposed that the armature guide has at least one outer and / or inner circumferential groove, preferably a longitudinal groove. These measures should also alone or in combination facilitate the hydraulic compensation with an axial displacement of the armature and thus improve the switching dynamics. In the preferred embodiment as longitudinal grooves in turn axially extending flow channels are provided, via which a hydraulic compensation is particularly easy to reach.

Gemäß einer bevorzugten Ausführungsform der Erfindung umfasst der Elektromagnet eine ringförmige Magnetspule, die in einem topfförmigen Magnetkern aufgenommen ist. Der Magnetkern dient dem Schutz der Magnetspule und bildet zugleich einen ringförmigen Außenpol sowie einen ringförmigen Innenpol aus, welche über einen ringförmigen Steg verbunden sind. Der topfförmige Magnetkern ist demnach bevorzugt lediglich zu einer Seite hin geöffnet, so dass über diese Seite die Magnetspule in den Magnetkern einsetzbar ist. Vorzugsweise ist der einseitig offene Magnetkern derart orientiert, dass der Arbeitsluftspalt zwischen dem Magnetkern und dem Anker ausgebildet wird. Das heißt, dass die offene Seite vorzugsweise die vom Anker abgewandte Seite ist. Die Magnetspule wird auf diese Weise durch den Magnetkern vor einem Kontakt mit Kraftstoff geschützt. Sofern die Ankerführung einen radial verlaufenden Bundabschnitt oder ein scheibenförmiges zweites Teil als Ersatz für eine zwischen dem Anker und dem Elektromagneten angeordnete Restluftspaltscheibe besitzt, kommt dieser bzw. dieses zwischen dem Magnetkern und dem Anker zu liegen. Die Ankerführung dient in diesem Fall der magnetischen Trennung zwischen dem Anker und dem Magnetkern, um ein magnetisches Kleben des Ankers am Magnetkern zu reduzieren, wenn die Magnetspule bestromt wird und sich der Anker zur Verringerung des axialen Arbeitsluftspalts in Richtung der Magnetspule bewegt.According to a preferred embodiment of the invention, the electromagnet comprises an annular magnetic coil which is accommodated in a cup-shaped magnetic core. The magnetic core serves to protect the magnetic coil and at the same time forms an annular outer pole and an annular inner pole, which are connected via an annular web. The pot-shaped magnetic core is therefore preferably open only to one side, so that on this side, the magnetic coil can be inserted into the magnetic core. Preferably, the unilaterally open magnetic core is oriented such that the working air gap between the magnetic core and the armature is formed. That is, the open side is preferably the side away from the anchor. The solenoid is protected in this way by the magnetic core against contact with fuel. If the anchor guide a radially extending collar portion or a disc-shaped second part as a substitute for one between the anchor and the electromagnet disposed residual air gap disc, this or this comes to rest between the magnetic core and the armature. The armature guide in this case serves as the magnetic separation between the armature and the magnetic core to reduce magnetic sticking of the armature to the magnetic core when the solenoid is energized and the armature moves in the direction of the solenoid to reduce the axial working air gap.

Weiterhin bevorzugt ist der Anker von der Federkraft einer Feder beaufschlagt. Die Feder dient der Rückstellung des Ankers in seine Ausgangslage, wenn die Bestromung der Magnetspule beendet wird. Vorzugsweise ist die Feder als Schraubendruckfeder ausgeführt. Alternativ oder ergänzend wird vorgeschlagen, dass die Feder die Ankerführung, insbesondere den sich in den axialen Arbeitsluftspalt hinein erstreckenden radial verlaufenden Bundabschnitt oder das dort angeordnete scheibenförmige zweite Teil der Ankerführung, durchsetzt. Denn dann kann die Feder unmittelbar oder mittelbar, beispielsweise über eine Einstellscheibe, an dem Anker abgestützt werden.Further preferably, the armature is acted upon by the spring force of a spring. The spring serves to return the armature to its initial position when the energization of the solenoid is terminated. Preferably, the spring is designed as a helical compression spring. Alternatively or additionally, it is proposed that the spring pass through the armature guide, in particular the radially extending collar section extending into the axial working air gap, or the disk-shaped second part of the armature guide arranged there. Because then the spring can be supported directly or indirectly, for example via a shim on the anchor.

Eine besonders kompakt bauende Ausgestaltung der Erfindung wird erreicht, wenn der Elektromagnet und/oder die Ankerführung in einer Axialbohrung einer Verschlussschraube aufgenommen sind, über welche ein Ventilkörper des Saugventils in einem Gehäuseteil der Kraftstoffhochdruckpumpe fixierbar ist. Ein separates Gehäuseteil für die elektromagnetische Stelleinheit kann auf diese Weise entfallen. Vorzugsweise ist die Axialbohrung der Verschlussschraube gestuft ausgeführt, um über eine Stufe eine Abstützung des Elektromagneten und/oder der Ankerführung in axialer Richtung zu erreichen.A particularly compact design of the invention is achieved when the electromagnet and / or the armature guide are received in an axial bore of a screw plug, via which a valve body of the suction valve in a housing part of the high-pressure fuel pump is fixed. A separate housing part for the electromagnetic actuator can be omitted in this way. Preferably, the axial bore of the screw plug is designed stepped in order to achieve via a step support of the electromagnet and / or the armature guide in the axial direction.

Das ferner vorgeschlagene Saugventil zur Versorgung einer Kraftstoffhochdruckpumpe, insbesondere einer Common-Rail-Hochdruckpumpe, mit Kraftstoff umfasst eine erfindungsgemäße elektromagnetische Stelleinheit, wobei der Anker mit einem Ventilkolben gekoppelt oder koppelbar ist, der eine mit einem Dichtsitz zusammenwirkende Dichtkontur besitzt. Die Kopplung bewirkt, dass der Anker bei einer axialen Verschiebung den Ventilkolben mitnimmt. Die Dichtkontur ist vorzugsweise an einem tellerförmigen Abschnitt des Ventilkolbens ausgebildet, so dass der Ventilkolben zugleich als Ventilschließelement dient.The further proposed suction valve for supplying a high-pressure fuel pump, in particular a common-rail high-pressure pump, with fuel comprises an electromagnetic actuator according to the invention, wherein the armature is coupled or can be coupled to a valve piston, which has a sealing contour cooperating with a sealing seat. The coupling causes the armature entrains the valve piston during an axial displacement. The sealing contour is preferably formed on a plate-shaped portion of the valve piston, so that the valve piston also serves as a valve closing element.

Bevorzugte Ausführungsformen der Erfindung werden nachfolgend anhand der beigefügten Zeichnungen näher erläutert. Diese zeigen:

  • Fig. 1 einen schematischen Längsschnitt durch ein in eine Hochdruckpumpe eingebautes Saugventil mit einer erfindungsgemäßen elektromagnetischen Stelleinheit,
  • Fig. 2 eine perspektivische Darstellung einer ersten, nicht erfindungsgemäßen Ankerführung einer elektromagnetischen Stelleinheit,
  • Fig. 3 einen schematischen Längsschnitt durch eine zweite Ankerführung einer erfindungsgemäßen elektromagnetischen Stelleinheit,
  • Fig. 4 einen schematischen Längsschnitt durch eine dritte, nicht erfindungsgemäße Ankerführung einer elektromagnetischen Stelleinheit,
  • Fig. 5 einen schematischen Querschnitt durch eine vierte Ankerführung einer erfindungsgemäßen elektromagnetischen Stelleinheit und
  • Fig. 6 einen schematischen Querschnitt durch eine fünfte Ankerführung einer erfindungsgemäßen elektromagnetischen Stelleinheit.
Preferred embodiments of the invention are explained below with reference to the accompanying drawings. These show:
  • Fig. 1 a schematic longitudinal section through a built-in a high-pressure pump suction valve with an electromagnetic actuator according to the invention,
  • Fig. 2 a perspective view of a first, non-inventive armature guide an electromagnetic actuator,
  • Fig. 3 a schematic longitudinal section through a second armature guide of an electromagnetic actuator according to the invention,
  • Fig. 4 a schematic longitudinal section through a third, non-inventive armature guide an electromagnetic actuator,
  • Fig. 5 a schematic cross section through a fourth armature guide of an electromagnetic actuator according to the invention and
  • Fig. 6 a schematic cross section through a fifth armature guide of an electromagnetic actuator according to the invention.

Ausführliche Beschreibung der ZeichnungenDetailed description of the drawings

Das in der Figur 1 dargestellte Saugventil umfasst einen axial verschiebbaren Ventilkolben 17 mit einem tellerförmigen Abschnitt 19, an dem eine mit einem Dichtsitz 18 zusammenwirkende Dichtkontur ausgebildet ist. Der Dichtsitz 18 ist in einem Ventilkörper 15 ausgebildet, der in einer Bohrung 26 eines Gehäuseteils 16 einer Kraftstoffhochdruckpumpe aufgenommen und über eine Verschlussschraube 14 lagefixiert ist. Der Ventilkolben 17 durchsetzt den Ventilkörper 15 und weist einen außerhalb des Ventilkörpers 15 zu liegen kommenden Abschnitt auf, der von einem Federteller 24 zur Abstützung einer Ventilfeder 25 umgeben ist. Über die Federkraft der Ventilfeder 25 ist der Ventilkolben 17 in Schließrichtung beaufschlagt.That in the FIG. 1 illustrated suction valve comprises an axially displaceable valve piston 17 with a plate-shaped portion 19, on which a cooperating with a sealing seat 18 sealing contour is formed. The sealing seat 18 is formed in a valve body 15, which is received in a bore 26 of a housing part 16 of a high-pressure fuel pump and fixed in position via a locking screw 14. The valve piston 17 passes through the valve body 15 and has a portion lying outside of the valve body 15 which is surrounded by a spring plate 24 for supporting a valve spring 25. About the spring force of the valve spring 25, the valve piston 17 is acted upon in the closing direction.

Zur Betätigung des Saugventils ist eine elektromagnetische Stelleinheit vorgesehen, die einen Elektromagneten 1 und einen axial verschiebbaren Anker 2 umfasst, der mit dem Ventilkolben 17 gekoppelt ist. Der Anker 2 ist als Flachanker ausgebildet und begrenzt stirnseitig einen axialen Arbeitsluftspalt 4, der zwischen dem Elektromagneten 1 und dem Anker 2 ausgebildet ist. Der Anker 2 ist in axialer Richtung neben dem Elektromagneten 1 angeordnet. Der Elektromagnet 1 umfasst eine ringförmige Magnetspule 10 sowie einen topfförmigen Magnetkern 11, in dem die Magnetspule 10 aufgenommen ist.For actuating the suction valve, an electromagnetic actuating unit is provided which comprises an electromagnet 1 and an axially displaceable armature 2, which is coupled to the valve piston 17. The armature 2 is designed as a flat armature and limits the end face an axial working air gap 4, which is formed between the electromagnet 1 and the armature 2. The armature 2 is arranged in the axial direction next to the electromagnet 1. The electromagnet 1 comprises an annular magnetic coil 10 and a cup-shaped magnetic core 11, in which the magnetic coil 10 is accommodated.

Bei einer Bestromung der Magnetspule 10 wird der Anker 2 in Richtung der Magnetspule 10 gezogen, um den axialen Arbeitsluftspalt 4 zu schließen. Dabei wird die axiale Verschiebung des Ankers 2 durch einen Hubanschlag 6 begrenzt, der vorliegend an einem erfindungsgemäß vorgesehenen radial verlaufenden Bundabschnitt 5 einer im Übrigen hülsenförmigen Ankerführung 3 ausgebildet ist, welche den Anker 2 umgibt. Zur Rückstellung des Ankers 2 in seine Ausgangslage ist eine Feder 12 vorgesehen, welche den Bundabschnitt 5 der Ankerführung durchsetzt.When the magnet coil 10 is energized, the armature 2 is pulled in the direction of the magnet coil 10 in order to close the axial working air gap 4. In this case, the axial displacement of the armature 2 is limited by a stroke stop 6, which in the present case is formed on an inventively provided radially extending collar portion 5 of a sleeve-shaped anchor guide 3, which surrounds the armature 2. To reset the armature 2 in its initial position, a spring 12 is provided, which passes through the collar portion 5 of the armature guide.

Die den Anker 2 umgebende Ankerführung 3 dient vorrangig der Führung und Lagerung des Ankers 2. Die Ankerführung 3 vermag somit einen zentralen Ankerbolzen zu ersetzen, welcher üblicherweise der Führung und/oder Lagerung des Ankers 2 dient. Die Ankerführung ist vorliegend aus einem nichtmagnetischen Material gefertigt, so dass hierüber zugleich eine magnetische Trennung des Ankers 2 vom Elektromagneten 1 bewirkt wird. Die Ankerführung 3 wirkt somit einem magnetischen Kleben des Ankers 2 am Elektromagneten 1 entgegen, wodurch die Schaltdynamik verbessert wird.The armature guide 3 surrounding the armature 2 serves primarily to guide and support the armature 2. The armature guide 3 is thus able to replace a central armature bolt, which usually serves to guide and / or support the armature 2. The armature guide is in the present case made of a non-magnetic material, so that at the same time a magnetic separation of the armature 2 from the electromagnet 1 is effected at the same time. The armature guide 3 thus counteracts a magnetic bonding of the armature 2 to the electromagnet 1, whereby the switching dynamics is improved.

Bevorzugte Ausgestaltungen einer Ankerführung 3 für eine erfindungsgemäße elektromagnetische Stelleinheit sind den Figuren 2 bis 6 zu entnehmen.Preferred embodiments of an armature guide 3 for an electromagnetic actuator according to the invention are the FIGS. 2 to 6 refer to.

Gemäß der in der Figur 2 dargestellten nicht erfindungsgemäßen Ausgestaltung kann die Ankerführung 3 als geschlitzte Hülse ausgebildet sein. Diese Ausgestaltung einer Ankerführung 3 ist besonders einfach und damit kostengünstig zu fertigen. Denn es kann ein Folienmaterial verwendet werden, das zu einer Hülse gerollt wird. Die dabei sich gegenüberliegenden Längskanten der Folie bilden einen axial verlaufenden Schlitz 8 aus, der zugleich als Strömungskanal dient, um den erforderlichen hydraulischen Ausgleich bei einer axialen Verschiebung des Ankers 2 zu schaffen.According to the in the FIG. 2 not illustrated embodiment, the armature guide 3 may be formed as a slotted sleeve. This embodiment of an armature guide 3 is particularly simple and therefore inexpensive to manufacture. Because it can be used a film material that is rolled into a sleeve. The case opposite longitudinal edges of the film form an axially extending slot 8, at the same time as Flow channel is used to provide the necessary hydraulic compensation in an axial displacement of the armature 2.

Eine alternative Ausführungsform einer Ankerführung 3 ist in der Fig. 3 dargestellt. Hier ist die Ankerführung 3 topfförmig gestaltet, wobei der erfindungsgemäß vorgesehene radial verlaufende Bundabschnitt 5 zur Ausbildung des Hubanschlags 6 eine zentrale Ausnehmung zur Durchführung der Feder 12 begrenzt.An alternative embodiment of an armature guide 3 is in the Fig. 3 shown. Here, the armature guide 3 is cup-shaped, wherein the inventively provided radially extending collar portion 5 for forming the stroke stop 6, a central recess for the passage of the spring 12 is limited.

Sofern die Ankerführung 3 keinen Schlitz 8 besitzt, ist vorzugsweise wenigstens eine Bohrung 7 vorzusehen, über welche ein hydraulischer Ausgleich und/oder eine Entlüftung bewirkbar ist bzw. sind. Eine hülsenförmige Ankerführung 3 mit mehreren Bohrungen 7 ist beispielhaft in der Figur 4 dargestellt. Die Ankerführung 3 könnte erfindungsgemäß auch topfförmig gestaltet sein.If the armature guide 3 has no slot 8, it is preferable to provide at least one bore 7, via which a hydraulic compensation and / or a ventilation can be effected. A sleeve-shaped armature guide 3 with a plurality of holes 7 is exemplary in the FIG. 4 shown. The armature guide 3 could also be designed cup-shaped according to the invention.

Gleiches gilt für die in den Figuren 5 und 6 dargestellten Ausgestaltungen einer Ankerführung 3. Diese weisen jeweils mehrere längs verlaufende Nuten 9 auf, die außenumfangseitig (Fig. 5) oder innenumfangseitig (Fig. 6) an einer hülsen- oder topfförmigen Ankerführung 3 ausgebildet sind. Die Nuten 9 dienen als Strömungskanäle, um den erforderlichen hydraulischen Ausgleich bei einer axialen Verschiebung des Ankers 2 zu schaffen.The same applies to the in the FIGS. 5 and 6 These each have a plurality of longitudinal grooves 9, the outer peripheral side ( Fig. 5 ) or inside peripheral side ( Fig. 6 ) are formed on a sleeve or cup-shaped anchor guide 3. The grooves 9 serve as flow channels to provide the necessary hydraulic compensation with an axial displacement of the armature 2.

Die Ankerführung 3 einer erfindungsgemäßen elektromagnetischen Stelleinheit ist vorzugsweise - wie in der Figur 1 dargestellt - unmittelbar in einer Axialbohrung 13 der Verschlussschraube 14 aufgenommen, so dass die Stelleinheit und damit das Saugventil in axialer wie auch in radialer Richtung besonders kompakt bauend ausgeführt werden kann. In die Axialbohrung 13 ist vorliegend ferner der Elektromagnet 1 eingesetzt, wobei zum Schutz des Elektromagneten 1 eine Umspritzung 20 die Axialbohrung 13 nach außen hin abdichtet. Die Umspritzung 20 bildet zugleich einen Steckeranschluss 22 für den elektrischen Anschluss der Magnetspule 10 aus. Ein Spulendrahtende 21 der Magnetspule 10 ist hierzu bis zu einem Kontaktpin 23 des Steckeranschlusses 22 geführt.The armature guide 3 of an electromagnetic actuator according to the invention is preferably - as in the FIG. 1 shown - taken directly into an axial bore 13 of the screw 14, so that the actuator and thus the suction valve in the axial and radial direction can be made very compact design. In the axial bore 13 in the present case, the solenoid 1 is further used, wherein for the protection of the electromagnet 1, an encapsulation 20, the axial bore 13 seals to the outside. The encapsulation 20 also forms a plug connection 22 for the electrical connection of the magnetic coil 10. A coil wire end 21 of the magnetic coil 10 is guided for this purpose up to a contact pin 23 of the connector terminal 22.

Claims (10)

  1. Electromagnetic actuating unit for a suction valve for the supply of fuel to a high-pressure fuel pump, in particular to a common-rail high-pressure pump, comprising an electromagnet (1) and an armature (2) which is guided in axially displaceable fashion in an armature guide (3) which surrounds an outer circumferential region of the armature (2), wherein the armature guide (3) simultaneously serves for the mounting of the armature, wherein the armature (2) is designed as a flat armature which delimits an axial working air gap (4) formed between the armature (2) and the electromagnet (1), characterized in that the armature guide (3) has a radially running collar section (5) which extends into the working air gap (4), wherein the armature guide (3) is preferably of substantially pot-shaped form.
  2. Actuating unit according to Claim 1,
    characterized in that the armature guide (3) is a separate component which is of sleeve-shaped form at least in sections and which preferably extends over the entire height of the armature (2).
  3. Actuating unit according to one of the preceding claims,
    characterized in that the armature guide (3) forms a stroke stop (6) for the armature (2).
  4. Actuating unit according to one of the preceding claims,
    characterized in that the armature guide (3) is manufactured entirely or partially from a non-magnetic material.
  5. Actuating unit according to one of the preceding claims,
    characterized in that the armature guide (3) has at least one circumferential aperture in the form of a bore (7) and/or of a slot (8).
  6. Actuating unit according to one of the preceding claims,
    characterized in that the armature guide (3) has at least one groove (9), preferably longitudinal groove, in the outer' circumference and/or in the inner circumference.
  7. Actuating unit according to one of the preceding claims,
    characterized in that the electromagnet (1) comprises a ring-shaped magnet coil (10) which is received in a pot-shaped magnet core (11), wherein the working air gap (4) is preferably formed between the magnet core (11) and the armature (2).
  8. Actuating unit according to one of the preceding claims,
    characterized in that the armature (2) is acted on by the spring force of a spring (12) which preferably is designed as a helical compression spring and/or extends through the armature guide (3).
  9. Actuating unit according to one of the preceding claims,
    characterized in that the electromagnet (1) and/or the armature guide (3) are received in an axial bore (13), which is preferably of stepped design, of a closure screw (14) by means of which a valve body (15) of the suction valve can be fixed in a housing part (16) of the high-pressure fuel pump.
  10. Suction valve for the supply of fuel to a high-pressure fuel pump, in particular to a common-rail high-pressure pump, comprising an electromagnetic actuating unit according to one of the preceding claims, wherein the armature (2) is coupled or couplable to a valve piston (17) which has a sealing contour which interacts with a sealing seat (18) which is preferably formed on a plate-like section (19) of the valve piston (17).
EP15727376.4A 2014-07-22 2015-06-02 Electromagnetic actuating unit for a suction valve and a suction valve Not-in-force EP3172428B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014214231.8A DE102014214231A1 (en) 2014-07-22 2014-07-22 Electromagnetic actuator for a suction valve and suction valve
PCT/EP2015/062248 WO2016012143A1 (en) 2014-07-22 2015-06-02 Electromagnetic actuating unit for an intake valve and intake valve

Publications (2)

Publication Number Publication Date
EP3172428A1 EP3172428A1 (en) 2017-05-31
EP3172428B1 true EP3172428B1 (en) 2018-08-15

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DE (1) DE102014214231A1 (en)
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EP3172428A1 (en) 2017-05-31
DE102014214231A1 (en) 2016-01-28
WO2016012143A1 (en) 2016-01-28

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