EP0814238B1 - Electromagnetic actuating device for lift valves of internal combustion engines - Google Patents

Electromagnetic actuating device for lift valves of internal combustion engines Download PDF

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Publication number
EP0814238B1
EP0814238B1 EP97106783A EP97106783A EP0814238B1 EP 0814238 B1 EP0814238 B1 EP 0814238B1 EP 97106783 A EP97106783 A EP 97106783A EP 97106783 A EP97106783 A EP 97106783A EP 0814238 B1 EP0814238 B1 EP 0814238B1
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EP
European Patent Office
Prior art keywords
valve
actuating device
internal combustion
tappet
combustion engines
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Expired - Lifetime
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EP97106783A
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German (de)
French (fr)
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EP0814238A1 (en
Inventor
Karl Treffler
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means

Definitions

  • the invention relates to an electromagnetic actuator for Internal combustion engine lift valves with one in the actuator housing of the actuating device guided valve actuating plunger, which interacts a hydraulic valve lash compensation element on the stem acts on the globe valve.
  • EP-A-405 189 referenced.
  • An electromagnetic lift valve actuator has immense Advantages because the so-called valve timing, d. H. the opening time and the Closing time of the globe valves, as well as the valve lift and valve lift curve are freely adjustable.
  • valve timing d. H. the opening time and the Closing time of the globe valves, as well as the valve lift and valve lift curve are freely adjustable.
  • any way to Compensation for the valve clearance may be provided, especially in cooperation with a known valve lash compensation element.
  • a possible construction for this is shown in the above-mentioned document, whereby the valve clearance compensation element in the interior of the actuator housing, more precisely in the armature provided in it, between the two electromagnetic coils of the actuator housing is guided to be longitudinally displaceable is.
  • valve lash adjuster hides a number of disadvantages. So a usually hydraulic valve lash compensation element with a suitable hydraulic medium - usually the lubricating oil of the internal combustion engine is used for this - supplied become what is extremely problematic in the interior of the actuator housing is because the solenoids and the armature moving between them are not may be charged with the internal combustion engine lubricating oil. Further causes the valve lash adjuster located in the armature one Malfunction of the magnetic flux in the armature or generally a malfunction of the magnetic field lines. Furthermore, the anchor is made of soft iron and thus allows not the direct installation of a simple one, just from a piston as well a spring element existing (in itself common) valve lash compensation element, since this cannot be moved lengthways directly in the anchor can be stored.
  • the object of the present invention is to show an improved arrangement of a known hydraulic valve lash compensation element.
  • the valve lash compensation element is inserted in a cup tappet arranged between the valve actuating tappet and the lifting valve stem, which in turn is guided displaceably in the valve axis direction in a base plate of the actuator housing, the outside diameter of the cup tappet being small compared to that of the actuator housing and is essentially only twice the wall thickness of the tappet wall larger than the outer diameter of the common valve lash compensation element.
  • valve clearance compensating element no longer arranged within the actuator housing no interference with the magnetic field lines between the armature and the solenoids.
  • the proposed tappet now allows direct installation of the simplest, only from a piston and a Spring element of existing (per se common) valve lash compensation element, and the moving masses - as desirable - so To keep it as small as possible, the diameter of the tappet is like specified minimized.
  • FIG. 3 shows an enlarged view of the area around the valve lash compensation element from Fig. 2.
  • an internal combustion engine lift valve 1 which is known in the art Way is arranged in the engine cylinder head 2, one in it Set of 3 designated electromagnetic actuator intended.
  • This consists of a so-called actuator housing 4, inside whose two magnetic coils 5 are arranged, between which an armature plate 6 is mounted for longitudinal displacement in the valve axis direction 7.
  • This anchor plate 6 is moved by the correspondingly excited magnet coils 5 and ultimately transmits its movement via a valve actuation tappet 8 the stem 1 'of the lift valve 1.
  • a cup tappet 9 which carries a common, common valve lash compensation element 10, the two ends of this compensating element 10 on the inside of the tappet 9 on the one hand and at the free end of the shaft 1 ' support on the other.
  • the tappet 9 is in a so-called base plate 4 'of the actuator housing 4 out and also longitudinally displaceable in the valve axis direction 7 to the movement of the valve actuating tappet 8 can be transferred to the globe valve 1.
  • FIG. 1 it is actually plate-shaped Base plate 4 'with a corresponding circular cylindrical receptacle 11 provided, in which the tappet 9 is directly slidably mounted.
  • the tappet 9 is secured against falling out during assembly by means of a snap ring 12, a groove 13 in the outer wall of the Bucket 9 the free movement compared to the snap ring 12 in ensures the required scope.
  • 2 is the Cup tappet 9 guided in a sleeve 14, which is in the receptacle 11 here thicker designed base plate 4 '- this takes the additional lower magnetic coil 5 on - is inserted.
  • the tappet 9 again against falling out via a snap ring 12 secured.
  • the outer diameter is in both exemplary embodiments the cup tappet 9 is small compared to that of the actuator housing 4, d. H. the outer diameter of the tappet 9 is essentially only the one that is twice the wall thickness of the tappet wall Outside diameter of the common valve lash adjustment element 10. In this respect this differs in terms of a minimal dead weight Optimized tappets 9 significantly from common tappets, which are usually are stored directly in the engine cylinder head Take up the compensating element and be actuated directly by cams.
  • the detailed structure of the actuator housing 4 as well the storage of the electromagnetic actuator 3 in the cylinder head 2 is not described in more detail here and can be designed be as in unpublished patent application 196 11 547, however this and a number of other details may vary be designed by the exemplary embodiments shown, without the content of To leave claims.

Description

Die Erfindung betrifft eine elektromagnetische Betätigungsvorrichtung für Brennkraftmaschinen-Hubventile mit einem im Aktuatorgehäuse der Betätigungsvorrichtung geführten Ventilbetätigungsstößel, der unter Zwischenwirkung eines hydraulischen Ventilspiel-Ausgleichselementes auf den Schaft des Hubventiles einwirkt. Zum bekannten Stand der Technik wird auf die EP-A-405 189 verwiesen.The invention relates to an electromagnetic actuator for Internal combustion engine lift valves with one in the actuator housing of the actuating device guided valve actuating plunger, which interacts a hydraulic valve lash compensation element on the stem acts on the globe valve. The known state of the art is EP-A-405 189 referenced.

Eine elektromagnetische Hubventil-Betätigungsvorrichtung hat immense Vorteile, da die sog. Ventilsteuerzeiten, d. h. der Öffnungszeitpunkt und der Schließzeitpunkt der Hubventile, sowie der Ventilhub und Ventilhubverlauf frei einstellbar sind. Dabei sollte jedoch auch an einer derartigen elektromagnetischen Hubventil-Betätigungsvorrichtung irgendeine Möglichkeit zum Ausgleich des Ventilspieles vorgesehen sein, insbesondere in Zusammenwirkung mit einem an sich bekannten Ventilspiel-Ausgleichselement. Eine mögliche Konstruktion hierfür ist in der oben genannten Schrift gezeigt, wobei das Ventilspiel-Ausgleichselement im Innenraum des Aktuatorgehäuses, genauer im darin vorgesehenen Anker, der zwischen den beiden Elektromagnetspulen des Aktuatorgehäuses längsverschiebbar geführt ist, angeordnet ist.An electromagnetic lift valve actuator has immense Advantages because the so-called valve timing, d. H. the opening time and the Closing time of the globe valves, as well as the valve lift and valve lift curve are freely adjustable. However, such an electromagnetic Lift valve actuator any way to Compensation for the valve clearance may be provided, especially in cooperation with a known valve lash compensation element. A possible construction for this is shown in the above-mentioned document, whereby the valve clearance compensation element in the interior of the actuator housing, more precisely in the armature provided in it, between the two electromagnetic coils of the actuator housing is guided to be longitudinally displaceable is.

Eine derartige Anordnung des Ventilspielausgleichselementes birgt jedoch eine Reihe von Nachteilen. So muß ein üblicherweise hydraulisches Ventilspiel-Ausgleichselement mit einem geeigneten Hydraulikmedium - üblicherweise wird hierfür das Schmieröl der Brennkraftmaschine verwendet - versorgt werden, was im Innenraum des Aktuatorgehäuses äußerst problematisch ist, da die Magnetspulen und der zwischen diesen bewegte Anker nicht mit dem Brennkraftmaschinen-Schmieröl beaufschlagt werden dürfen. Ferner verursacht das im Anker angeordnete Ventilspiel-Ausgleichselement eine Störung des Magnetflusses im Anker bzw. allgemein eine Störung der Magnetfeldlinien. Ferner besteht der Anker aus Weicheisen und erlaubt somit nicht den direkten Einbau eines einfachsten, lediglich aus einem Kolben sowie einem Federelement bestehenden (an sich gängigen) Ventilspiel-Ausgleichselementes, da dieses nicht längsverschiebbar direkt im Anker gelagert sein kann.However, such an arrangement of the valve lash adjuster hides a number of disadvantages. So a usually hydraulic valve lash compensation element with a suitable hydraulic medium - usually the lubricating oil of the internal combustion engine is used for this - supplied become what is extremely problematic in the interior of the actuator housing is because the solenoids and the armature moving between them are not may be charged with the internal combustion engine lubricating oil. Further causes the valve lash adjuster located in the armature one Malfunction of the magnetic flux in the armature or generally a malfunction of the magnetic field lines. Furthermore, the anchor is made of soft iron and thus allows not the direct installation of a simple one, just from a piston as well a spring element existing (in itself common) valve lash compensation element, since this cannot be moved lengthways directly in the anchor can be stored.

Aufgabe der vorliegenden Erfindung ist es, eine demgegenüber verbesserte Anordnung eines an sich bekannten hydraulischen Ventilspiel-Ausgleichselementes aufzuzeigen.
Zur Lösung dieser Aufgabe ist vorgesehen, daß das Ventilspiel-Ausgleichselement in einem zwischen dem Ventilbetätigungsstößel und dem Hubventil-Schaft angeordneten Tassenstößel eingesetzt ist, der seinerseits in Ventilachsrichtung verschiebbar in einer Bodenplatte des Aktuatorgehäuses geführt ist, wobei der Außendurchmesser des Tassenstößels klein gegenüber demjenigen des Aktuatorgehäuses und im wesentlichen nur um die doppelte Wandstärke der Tassenstößel-Wand größer als der Außendurchmesser des gängigen Ventilspiel-Ausgleichselementes ist. The object of the present invention is to show an improved arrangement of a known hydraulic valve lash compensation element.
To solve this problem, it is provided that the valve lash compensation element is inserted in a cup tappet arranged between the valve actuating tappet and the lifting valve stem, which in turn is guided displaceably in the valve axis direction in a base plate of the actuator housing, the outside diameter of the cup tappet being small compared to that of the actuator housing and is essentially only twice the wall thickness of the tappet wall larger than the outer diameter of the common valve lash compensation element.

Mit diesen Merkmalen ist es zunächst einmal möglich, ein hydraulisches Ventilspiel-Ausgleichselement mit einem geeigneten Hydraulikmedium zu versorgen, ohne daß dieses Hydraulikmedium in den Innenraum des Aktuatorgehäuses gelangt, wobei eine vorteilhafte Anordnung des entsprechenden Versorgungskanales in Anspruch 2 angegeben ist. Ferner verursacht das nun nicht mehr innerhalb des Aktuatorgehäuses angeordnete Ventilspiel-Ausgleichselement keine Störung der Magnetfeldlinien zwischen dem Anker und den Magnetspulen. Der vorgeschlagene Tassenstößel erlaubt nun den direkten Einbau eines einfachsten, lediglich aus einem Kolben sowie einem Federelement bestehenden (an sich gängigen) Ventilspiel-Ausgleichselementes, und um dabei die bewegten Massen - wie wünschenswert - so gering als möglich zu halten, ist der Durchmesser des Tassenstößels wie angegeben minimiert.With these features it is possible to start with a hydraulic one Valve clearance compensation element with a suitable hydraulic medium supply without this hydraulic medium in the interior of the actuator housing arrives, an advantageous arrangement of the corresponding Supply channel is specified in claim 2. It also causes now valve clearance compensating element no longer arranged within the actuator housing no interference with the magnetic field lines between the armature and the solenoids. The proposed tappet now allows direct installation of the simplest, only from a piston and a Spring element of existing (per se common) valve lash compensation element, and the moving masses - as desirable - so To keep it as small as possible, the diameter of the tappet is like specified minimized.

Näher erläutert wird die Erfindung anhand zweier bevorzugter Ausführungsbeispiele, wobei in den beiden Figuren 1, 2 jeweils ein Längsschnitt durch eine elektromagnetische Betätigungsvorrichtung mit zu betätigendem Hubventil dargestellt ist und gleiche Bauelemente stets mit gleichen Bezugsziffern bezeichnet sind. Fig. 3 zeigt vergrößert die Umgebung des Ventilspiel-Ausgleichselementes aus Fig. 2.The invention is explained in more detail with reference to two preferred exemplary embodiments, a longitudinal section in each of the two FIGS. 1, 2 an electromagnetic actuator with a lift valve to be operated is shown and the same components always with the same reference numerals are designated. Fig. 3 shows an enlarged view of the area around the valve lash compensation element from Fig. 2.

Zur Betätigung eines Brennkraftmaschinen-Hubventiles 1, das in bekannter Weise im Brennkraftmaschinen-Zylinderkopf 2 angeordnet ist, ist eine in ihrer Gesamtheit mit 3 bezeichnete elektromagnetische Betätigungsvorrichtung vorgesehen. Diese besteht aus einem sog. Aktuatorgehäuse 4, innerhalb dessen zwei Magnetspulen 5 angeordnet sind, zwischen denen eine Ankerplatte 6 in Ventilachsrichtung 7 längsverschiebbar gelagert ist. Diese Ankerplatte 6 wird durch die entsprechend erregten Magnetspulen 5 bewegt und überträgt ihre Bewegung über einen Ventilbetätigungsstößel 8 letztlich auf den Schaft 1' des Hubventiles 1.For actuating an internal combustion engine lift valve 1, which is known in the art Way is arranged in the engine cylinder head 2, one in it Set of 3 designated electromagnetic actuator intended. This consists of a so-called actuator housing 4, inside whose two magnetic coils 5 are arranged, between which an armature plate 6 is mounted for longitudinal displacement in the valve axis direction 7. This anchor plate 6 is moved by the correspondingly excited magnet coils 5 and ultimately transmits its movement via a valve actuation tappet 8 the stem 1 'of the lift valve 1.

Zwischen dem dem Schaft 1' zugewandten Ende des Ventilbetätigungsstößels 8 sowie dem freien Ende des Schaftes 1' ist ein Tassenstößel 9 vorgesehen, der ein übliches, gängiges Ventilspiel-Ausgleichselement 10 trägt, wobei sich die beiden Enden dieses Ausgleichselementes 10 an der Innenseite des Tassenstößels 9 einerseits und am freien Ende des Schaftes 1' andererseits abstützen. Der Tassenstößel 9 ist dabei in einer sog. Bodenplatte 4' des Aktuatorgehäuses 4 geführt und zwar ebenfalls längsverschiebbar in Ventilachsrichtung 7, um die Bewegung des Ventilbetätigungsstößels 8 auf das Hubventil 1 übertragen zu können.Between the end of the valve actuating tappet facing the shaft 1 ' 8 and the free end of the shaft 1 'a cup tappet 9 is provided, which carries a common, common valve lash compensation element 10, the two ends of this compensating element 10 on the inside of the tappet 9 on the one hand and at the free end of the shaft 1 ' support on the other. The tappet 9 is in a so-called base plate 4 'of the actuator housing 4 out and also longitudinally displaceable in the valve axis direction 7 to the movement of the valve actuating tappet 8 can be transferred to the globe valve 1.

Beim Ausführungsbeispiel nach Fig. 1 ist die tatsächlich plattenförmig gestaltete Bodenplatte 4' mit einer entprechenden kreiszylindrischen Aufnahme 11 versehen, in welcher der Tassenstößel 9 direkt verschiebbar gelagert ist. Gegen Herausfallen bei der Montage gesichert ist der Tassenstößel 9 dabei mittels eines Sprengringes 12, wobei eine Nut 13 in der Außenwand des Tassenstößels 9 die freie Verschiebbarkeit gegenüber dem Sprengring 12 im benötigten Umfang sicherstellt. Beim Ausführungsbeispiel nach Fig. 2 ist der Tassenstößel 9 in einer Büchse 14 geführt, die in die Aufnahme 11 der hier dicker gestalteten Bodenplatte 4' - diese nimmt zusätzliche die untere Magnetspule 5 auf - eingesetzt ist. Auch beim Ausführungsbeispiel nach Fig. 2 ist der Tassenstößel 9 über einen Sprengring 12 wieder gegen Herausfallen gesichert.In the embodiment according to FIG. 1, it is actually plate-shaped Base plate 4 'with a corresponding circular cylindrical receptacle 11 provided, in which the tappet 9 is directly slidably mounted. The tappet 9 is secured against falling out during assembly by means of a snap ring 12, a groove 13 in the outer wall of the Bucket 9 the free movement compared to the snap ring 12 in ensures the required scope. 2 is the Cup tappet 9 guided in a sleeve 14, which is in the receptacle 11 here thicker designed base plate 4 '- this takes the additional lower magnetic coil 5 on - is inserted. Also in the embodiment according to FIG. 2 is the tappet 9 again against falling out via a snap ring 12 secured.

Wie ersichtlich ist bei beiden Ausführungsbeispielen der Außendurchmesser des Tassenstößels 9 klein gegenüber demjenigen des Aktuatorgehäuses 4, d. h. der Außendurchmesser des Tassenstößels 9 beträgt im wesentlichen nur den um die doppelte Wandstärke der Tassenstößel-Wand vergrößerten Außendurchmesser des gängigen Ventilspiel-Ausgleichselementes 10. Insofern unterscheidet sich dieser im Hinblick auf ein minimales Eigengewicht optimierte Tassenstößel 9 wesentlich von gängigen Tassenstößeln, die üblicherweise direkt im Brennkraftmaschinen-Zylinderkopf gelagert sind, ein Ausgleichselement aufnehmen und dabei direkt von Nocken betätigt werden.As can be seen, the outer diameter is in both exemplary embodiments the cup tappet 9 is small compared to that of the actuator housing 4, d. H. the outer diameter of the tappet 9 is essentially only the one that is twice the wall thickness of the tappet wall Outside diameter of the common valve lash adjustment element 10. In this respect this differs in terms of a minimal dead weight Optimized tappets 9 significantly from common tappets, which are usually are stored directly in the engine cylinder head Take up the compensating element and be actuated directly by cams.

In der Bodenplatte 4' verläuft ein Ölversorgungskanal 15 für das hydraulische Ventilspiel-Ausgleichselement 10, der einerseits über einen Stichkanal 16' mit einem Ölkanal 16 im Zylinderkopf 2 in Verbindung steht und andererseits an der Außenwand des Tassenstößels 9 mündet. Von hier gelangt das Hydraulikmedium bzw. Schmieröl wie üblich zum hydraulischen Ventilspiel-Ausgleichselement 10. Der detaillierte Aufbau des Aktuatorgehäuses 4 sowie die Lagerung der elektromagnetischen Betätigungsvorrichtung 3 im Zylinderkopf 2 ist an dieser Stelle nicht näher beschrieben und kann gestaltet sein wie in der nicht vorveröffentlichten Patentanmeldung 196 11 547, jedoch kann dies sowie eine Vielzahl weiterer Details durchaus abweichend von den gezeigten Ausführungsbeispielen gestaltet sein, ohne den Inhalt der Patentansprüche zu verlassen.An oil supply duct 15 for the hydraulic runs in the base plate 4 ' Valve clearance compensation element 10, on the one hand via a branch channel 16 'communicates with an oil channel 16 in the cylinder head 2 and on the other hand opens on the outer wall of the tappet 9. This is where it comes from Hydraulic medium or lubricating oil as usual for the hydraulic valve lash compensation element 10. The detailed structure of the actuator housing 4 as well the storage of the electromagnetic actuator 3 in the cylinder head 2 is not described in more detail here and can be designed be as in unpublished patent application 196 11 547, however this and a number of other details may vary be designed by the exemplary embodiments shown, without the content of To leave claims.

Claims (2)

  1. An electromagnetic actuating device for gate valves (1) of internal combustion engines, comprising a valve-actuating push rod (8) guided in the casing (4) of the actuating device (3) and acting on the shank (1') of the gate valve (1) with interposition of a hydraulic valve clearance-compensating element (10),
    characterised in that the valve clearance-compensating element (10) is inserted into a cup push rod (9) which is disposed between the valve-actuating push rod (8) and the gate valve shaft (1') and is guided for movement in the axial direction (7) of the valve in a baseplate (4') of the actuator casing (4), wherein the outer diameter of the cup push rod (9) is small compared with that of the actuator casing (4) and is greater than the outer diameter of the conventional valve clearance-compensating element (9) substantially by only twice the thickness of the cup push-rod wall.
  2. An actuating device according to claim 1, characterised in that a duct (15) for supplying oil to the hydraulic valve clearance-compensating element (10) runs through the baseplate (4').
EP97106783A 1996-06-18 1997-04-24 Electromagnetic actuating device for lift valves of internal combustion engines Expired - Lifetime EP0814238B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19624296 1996-06-18
DE19624296A DE19624296A1 (en) 1996-06-18 1996-06-18 Electromagnetic actuating device for internal combustion engine lift valves

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EP0814238A1 EP0814238A1 (en) 1997-12-29
EP0814238B1 true EP0814238B1 (en) 2000-01-19

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EP1002938A2 (en) * 1998-11-20 2000-05-24 Toyota Jidosha Kabushiki Kaisha Solenoid valve device
US6089197A (en) * 1998-06-16 2000-07-18 Fev Motorentechnik Gmbh Electromagnetic actuator for an engine valve, including an integrated valve slack adjuster
US6394416B2 (en) 1998-08-20 2002-05-28 Daimlerchrysler Ag Device for operating a gas exchange valve
US6554248B2 (en) * 2000-08-15 2003-04-29 Nissan Motor Co., Ltd. Apparatus for estimating valve-clearance of an electro-magnetically operated valve and valve-operation controller for the electro-magnetically operated valve
FR2864574A1 (en) 2003-12-24 2005-07-01 Peugeot Citroen Automobiles Sa POWER SUPPLY CIRCUIT FOR A HYDRAULIC STOP, FOR RETRIEVING THE OPERATING SET BETWEEN A VALVE OF AN INTERNAL COMBUSTION ENGINE AND ITS ACTUATING DEVICE

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WO1998042953A1 (en) * 1997-03-24 1998-10-01 Lsp Innovative Automotive Systems Gmbh Valve for an internal combustion engine
DE19728479C2 (en) 1997-07-05 2001-08-30 Daimler Chrysler Ag Device for actuating a gas exchange valve with an electromagnetic actuator
DE19745522C2 (en) * 1997-10-15 2001-03-22 Daimler Chrysler Ag Device for actuating a gas exchange valve of a reciprocating piston internal combustion engine
JPH11336519A (en) * 1998-04-07 1999-12-07 Fev Motorentechnik Gmbh & Co Kg Electromagnetic actuator for gas exchange valve with integrated valve gap correcting device
DE19825412C2 (en) * 1998-06-06 2001-10-25 Daimler Chrysler Ag Device for actuating a gas exchange valve
DE19831250C1 (en) * 1998-07-11 1999-10-07 Daimler Chrysler Ag Solenoid operated poppet valve for internal combustion engine
DE19831520A1 (en) * 1998-07-14 2000-01-20 Schaeffler Waelzlager Ohg Electromagnetic valve drive which is built into cylinder head of IC engine has valve drive with devices for centering middle position of closing and opening magnets, relative to half stroke of armature
DE19851679C1 (en) * 1998-11-10 2000-05-31 Daimler Chrysler Ag Electromagnetic valve actuator starting involves periodically stimulating magnet during starting, setting current level so valve disc contacts valve seat without armature reaching magnet
DE19938451A1 (en) 1999-08-13 2001-02-15 Bayerische Motoren Werke Ag Electromagnetically actuated valve train for a lifting valve of a reciprocating piston internal combustion engine
DE10000045A1 (en) 2000-01-02 2001-07-05 Leiber Heinz Electromagnetic actuator
DE10018559C1 (en) * 2000-04-14 2001-06-21 Daimler Chrysler Ag Electromagnetic actuator for stroke valve in IC engine cylinder has guide sleeve of separate sintered component with stretched neck acting as valve actuator guide

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DE3311250C2 (en) * 1983-03-28 1985-08-01 FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH, 5100 Aachen Device for the electromagnetic actuation of a gas exchange valve for positive displacement machines
DE3920976A1 (en) * 1989-06-27 1991-01-03 Fev Motorentech Gmbh & Co Kg ELECTROMAGNETIC OPERATING DEVICE
DE4035376C2 (en) * 1989-11-16 2000-04-27 Volkswagen Ag Actuator for a lift valve
US5127375A (en) * 1991-04-04 1992-07-07 Ford Motor Company Hydraulic valve control system for internal combustion engines

Cited By (6)

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Publication number Priority date Publication date Assignee Title
US6089197A (en) * 1998-06-16 2000-07-18 Fev Motorentechnik Gmbh Electromagnetic actuator for an engine valve, including an integrated valve slack adjuster
US6394416B2 (en) 1998-08-20 2002-05-28 Daimlerchrysler Ag Device for operating a gas exchange valve
EP1002938A2 (en) * 1998-11-20 2000-05-24 Toyota Jidosha Kabushiki Kaisha Solenoid valve device
US6554248B2 (en) * 2000-08-15 2003-04-29 Nissan Motor Co., Ltd. Apparatus for estimating valve-clearance of an electro-magnetically operated valve and valve-operation controller for the electro-magnetically operated valve
FR2864574A1 (en) 2003-12-24 2005-07-01 Peugeot Citroen Automobiles Sa POWER SUPPLY CIRCUIT FOR A HYDRAULIC STOP, FOR RETRIEVING THE OPERATING SET BETWEEN A VALVE OF AN INTERNAL COMBUSTION ENGINE AND ITS ACTUATING DEVICE
WO2005064123A2 (en) 2003-12-24 2005-07-14 Peugeot Citroen Automobiles Hydraulic bump stop supply system which is intended to take up the clearance between an internal combustion engine valve and the actuating member thereof

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EP0814238A1 (en) 1997-12-29
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