EP0354417B1 - Positioning device for a gas exchange valve - Google Patents

Positioning device for a gas exchange valve Download PDF

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Publication number
EP0354417B1
EP0354417B1 EP89113912A EP89113912A EP0354417B1 EP 0354417 B1 EP0354417 B1 EP 0354417B1 EP 89113912 A EP89113912 A EP 89113912A EP 89113912 A EP89113912 A EP 89113912A EP 0354417 B1 EP0354417 B1 EP 0354417B1
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EP
European Patent Office
Prior art keywords
armature plate
sleeve
pole faces
control device
chamber
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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.)
Expired - Lifetime
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EP89113912A
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German (de)
French (fr)
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EP0354417A1 (en
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Audi AG
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Audi 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/16—Silencing impact; Reducing wear

Definitions

  • the invention relates to an actuating device for a gas exchange valve according to the preamble of claim 1.
  • Such an actuator is known for example from DE-OS 30 24 109.
  • An armature plate which can be moved back and forth between two opposing magnets presses the gas exchange valve of an internal combustion engine into its open position in one position and is associated with the closed position of the gas exchange valve in its other position.
  • the magnets hold the anchor plate in their end positions.
  • B. a spring system the anchor plate in the direction of the drop from the pole face. The opposite pole face is then energized and captures the armature plate vibrating between the two end positions. This leads to an impact on the pole faces and a corresponding mechanical noise.
  • the invention is based, the impact noise to reduce.
  • the space which is located between the armature plate and the respectively spaced pole faces of the magnetic coils is closed, the armature plate having sealing means on its outer circumference which, by their abutment on the inner circumference of the sleeve closing the space between the pole faces
  • the armature plate having sealing means on its outer circumference which, by their abutment on the inner circumference of the sleeve closing the space between the pole faces
  • Throttles are provided that allow the compressed fluid to escape from one chamber to the other chamber in a controlled manner.
  • Figure 1 is a view of the system according to the invention, partly in section.
  • FIG. 2 shows a detail from FIG. 1, showing another embodiment of the invention.
  • the actuator for a gas exchange valve has a U-shaped core 10 for a pot magnet 12 and, opposite, a U-shaped core 14 for a pot magnet 16.
  • the two pole faces of the magnets 12 and 16 lie opposite one another.
  • An anchor plate 18 can be moved back and forth between them.
  • the pot magnet 10 has a cylindrical bore inside, into which a sleeve 20 which is integrally connected to the anchor plate 18 leads.
  • the opposite pot magnet 16 surrounds a cylindrical opening into which an extension 30 of the anchor plate 18 projects. Both the sleeve 20 and the extension 30 are at a short distance from the walls of the cores 10 and 14 of the pot magnets which are U-shaped in cross section.
  • the extension 30 of the anchor plate 18 presses on a plunger 32 which forms the stem of a gas exchange valve, which is not shown.
  • a helical spring 22 which is accommodated in the sleeve 20, presses the anchor plate 18 in the direction of the open position when it is attracted by the magnet 10, 12 associated with the closed position, wherein it is supported on an abutment 26.
  • a helical spring 24 presses the anchor plate 18 into the closed position when it bears against the magnet 14, 16 associated with the open position, wherein it is supported on an abutment 28.
  • the dead center or equilibrium state of the system when the magnet is not excited is centered between the opposing magnets 12 and 16.
  • the space between the pole faces of the magnets 10, 12 on the one hand and 14, 16 on the other hand is sealed laterally by a cylindrical sleeve 38, so that a closed chamber is formed.
  • This rammer is divided by the anchor plate 18 into an upper chamber 50 and a lower chamber 52. Due to the close guidance of the sleeve 20 in the cylindrical opening formed by the magnet 10, 12, no fluid can escape from the upper chamber 50 into this area, due to the tight guidance of the cylindrical extension in the cylindrical opening by the magnet 14, 16 is formed, an appreciable amount of fluid cannot escape from the lower chamber 52 into this area.
  • the chambers 50 and 52 thus enclose fluid and when the anchor plate 18 is moved back and forth from the upper to the lower position and vice versa, fluid is exchanged between the chambers 50 and 52.
  • the armature plate lies circumferentially sealingly against the sleeve 38.
  • a groove 34 can be formed on the circumference of the anchor plate 18, into which a sealing or piston ring 36 is inserted.
  • a lug can also be provided on the circumference of the anchor plate 18, which seals against the inner circumferential wall of the sleeve 38.
  • throttle bores 44 can be provided in the anchor plate, through which fluid can flow between the chambers 50 and 52.
  • overflow openings 42 are provided, for example in the form of holes in the sleeve 38, these holes of course sealing off from the outside have to be.
  • fluid can flow outside over the middle region of the path of the armature plate, when it comes from the contact to the pole faces of the one magnet to the contact to the pole face of the other magnet, and only in the end region of the path covered, when the sealing edge 36 or 40 has reached the upper or lower edge of the hole 42, there is no further flow around, and the last part of the path until shortly before the armature plate 18 strikes the pole face is dampened by the then compressed fluid.
  • the armature plate 18 is reciprocated by the mutual excitation of the magnets 12 and 16 and the action by the springs 22 and 24, the resistance due to fluid displacement should be low over a large area of the path.
  • the overflow openings 42 are provided, which enable an exchange of the fluid between the chambers 50 and 52. Only when approximately 80% to 90% of the total distance has been covered does the overflow opening close, since the sealing edge 36 or 40 has reached the outer edge of the overflow opening, and fluid exchange between the chambers 50 and 52 is only possible via bores which may be provided 44 possible in the anchor plate.
  • the fluid contained in the chamber which is constantly decreasing in volume, can only leak through the seal 40 or in the gaps formed by tolerance between the sleeve 20 and the inner circumference of the magnetic core 10 or through the gap between the extension 30 and escape the inner circumference of the core 14. This forms a fluid cushion shortly before the armature plate 18 strikes the pole faces of the magnets 10, 12 or 14, 16, which strongly dampens the impact and thus contributes to noise reduction.
  • the fluid enclosed in the chambers 50 and 52 can consist of air, but oil damping is also conceivable. If an oil mist is used for lubrication, the medium in the chamber is made up of air and oil.

Description

Die Erfindung bezieht sich auf eine Stelleinrichtung für ein Gaswechselventil gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an actuating device for a gas exchange valve according to the preamble of claim 1.

Eine derartige Stelleinrichtung ist beispielsweise aus der DE-OS 30 24 109 bekannt.Such an actuator is known for example from DE-OS 30 24 109.

Eine zwischen zwei gegenüberliegenden Magneten hin- und herbewegbare Ankerplatte drückt in ihrer einen Stellung das Gaswechselventil einer Brennkraftmaschine in ihre Offenstellung und ist in ihrer anderen Stellung der Schließstellung des Gaswechselventiles zugeordnet. Die Magnete halten die Ankerplatte in ihren Endstellungen fest, bei Stromabfall des Magneten beaufschlagt z. B. ein Federsystem die Ankerplatte in die Richtung des Abfalls von der Polfläche. Die gegenüberliegende Polfläche ist dann erregt und fängt die zwischen den beiden Endstellungen schwingende Ankerplatte ein. Dabei kommt es zu einem Aufschlag auf die Polflächen und ein entsprechendes mechanisches Geräusch.An armature plate which can be moved back and forth between two opposing magnets presses the gas exchange valve of an internal combustion engine into its open position in one position and is associated with the closed position of the gas exchange valve in its other position. The magnets hold the anchor plate in their end positions. B. a spring system the anchor plate in the direction of the drop from the pole face. The opposite pole face is then energized and captures the armature plate vibrating between the two end positions. This leads to an impact on the pole faces and a corresponding mechanical noise.

Aus der GB-A 2 137 420 ist eine Stelleinrichtung für Gaswechselventile bekannt, bei der eine Aufpralldämpfung der Ankerplatte erreicht wird durch ein entsprechendes Umströmen der Ankerplatte, das sich jedoch bis direkt vor dem Auftreffen der Ankerplatte auf die Polflächen fortsetzt. Lediglich das letzte Wegstück unmittelbar vor dem Auftreffen der Ankerplatte auf den Polflächen bringt eine Dichtwirkung mit sich, die vollständige Abdichtung findet erst statt, wenn die Ankerplatte tatsächlich an den Polflächen anliegt.From GB-A 2 137 420 an actuating device for gas exchange valves is known, in which an impact damping of the armature plate is achieved by a corresponding flow around the armature plate, which however continues until directly before the armature plate hits the pole faces. Only the last section immediately before the anchor plate hits the pole faces has a sealing effect, the complete sealing only takes place when the anchor plate actually lies against the pole faces.

Der Erfindung liegt die Aufgabe zugrunde, das Aufschlaggeräusch zu verringern.The invention is based, the impact noise to reduce.

Die Aufgabe wird gelöst durch den unabhängigen Anspruch 1.The object is achieved by independent claim 1.

Erfindungsgemäß ist vorgesehen, daß der Raum, der sich zwischen der Ankerplatte und den jeweils beabstandeten Polflächen der Magnetspulen befindet, geschlossen ist, wobei die Ankerplatte an ihrem Außenumfang Dichtmittel aufweist, die durch ihre Anlage an den Innenumfang der den Raum zwischen den Polflächen schließenden Hülse eine Abdichtwirkung haben. Drosselungen sind vorgesehen, die das kontrollierte Entweichen des komprimierten Fluids von der einen Kammer in die andere Rammer ermöglichen.According to the invention it is provided that the space which is located between the armature plate and the respectively spaced pole faces of the magnetic coils is closed, the armature plate having sealing means on its outer circumference which, by their abutment on the inner circumference of the sleeve closing the space between the pole faces Have a sealing effect. Throttles are provided that allow the compressed fluid to escape from one chamber to the other chamber in a controlled manner.

Bevorzugte Ausführungsformen sind in den Unteransprüchen beschrieben. Es zeigen:Preferred embodiments are described in the subclaims. Show it:

Fig. 1 eine Ansicht des erfindungsgemäßen Systems, teilweise geschnitten; undFigure 1 is a view of the system according to the invention, partly in section. and

Fig. 2 einen Ausschnitt aus Fig. 1 unter Darstellung einer weiteren Ausführungsform der Erfindung.FIG. 2 shows a detail from FIG. 1, showing another embodiment of the invention.

In Fig. 1 ist die Stelleinrichtung für ein Gaswechselventil vorgesehen. Sie besitzt einen U-förmigen Kern 10 für einen Topfmagneten 12, und, gegenüberliegend, einen U-förmigen Kern 14 für einen Topfmagneten 16. Die beiden Polflächen der Magnete 12 und 16 liegen einander gegenüber. Zwischen ihnen hin- und herbewegbar ist eine Ankerplatte 18. Der Topfmagnet 10 weist im Inneren eine zylindrische Bohrung auf, in die eine einstückig mit der Ankerplatte 18 verbundene Hülse 20 führt.In Fig. 1, the actuator for a gas exchange valve is provided. It has a U-shaped core 10 for a pot magnet 12 and, opposite, a U-shaped core 14 for a pot magnet 16. The two pole faces of the magnets 12 and 16 lie opposite one another. An anchor plate 18 can be moved back and forth between them. The pot magnet 10 has a cylindrical bore inside, into which a sleeve 20 which is integrally connected to the anchor plate 18 leads.

Der gegenüberliegende Topfmagnet 16 umgibt eine zylindrische Öffnung, in die ein Fortsatz 30 der Ankerplatte 18 hineinragt. Sowohl Hülse 20 als auch Fortsatz 30 haben einen geringen Abstand zu den Wandungen der im Querschnitt U-förmigen Kerne 10 und 14 der Topfmagneten.The opposite pot magnet 16 surrounds a cylindrical opening into which an extension 30 of the anchor plate 18 projects. Both the sleeve 20 and the extension 30 are at a short distance from the walls of the cores 10 and 14 of the pot magnets which are U-shaped in cross section.

Der Fortsatz 30 der Ankerplatte 18 drückt auf einen Stempel 32, der den Schaft eines Gaswechselventiles, das nicht dargestellt ist, bildet.The extension 30 of the anchor plate 18 presses on a plunger 32 which forms the stem of a gas exchange valve, which is not shown.

Eine Schraubenfeder 22, die in der Hülse 20 aufgenommen ist, drückt die Ankerplatte 18, wenn sie von dem der Schließstellung zugeordneten Magneten 10, 12 angezogen ist, in Richtung Offenstellung, wobei sie sich auf einem Widerlager 26 abstützt.A helical spring 22, which is accommodated in the sleeve 20, presses the anchor plate 18 in the direction of the open position when it is attracted by the magnet 10, 12 associated with the closed position, wherein it is supported on an abutment 26.

Eine Schraubenfeder 24 drückt die Ankerplatte 18, wenn sie an dem der Offenstellung zugeordneten Magneten 14, 16 anliegt, in die schließstellung, wobei sie sich an einem Widerlager 28 abstützt. Der Totpunkt oder Gleichgewichtszustand des Systems bei nicht erregtem Magneten ist mittig zwischen den gegenüberliegenden Magneten 12 und 16.A helical spring 24 presses the anchor plate 18 into the closed position when it bears against the magnet 14, 16 associated with the open position, wherein it is supported on an abutment 28. The dead center or equilibrium state of the system when the magnet is not excited is centered between the opposing magnets 12 and 16.

Der zwischen den Polflächen der Magneten 10, 12 einerseits und 14, 16 andererseits liegende Raum ist seitlich durch eine zylinderförmige Hülse 38 abgedichtet, so daß sich eine geschlossene Kammer bildet. Diese Rammer wird durch die Ankerplatte 18 in eine obere Kammer 50 und eine untere Kammer 52 geteilt. Durch die enge Führung der Hülse 20 in der durch den Magneten 10, 12 gebildeten zylinderförmigen Öffnung kann aus der oberen Kammer 50 kein Fluid in diesen Bereich ausweichen, durch die enge Führung des zylinderförmigen Fortsatzes in der zylinderförmigen Öffnung, die durch den Magneten 14, 16 gebildet wird, kann aus der unteren Kammer 52 keine nennenswerte Menge an Fluid in diesen Bereich ausweichen.The space between the pole faces of the magnets 10, 12 on the one hand and 14, 16 on the other hand is sealed laterally by a cylindrical sleeve 38, so that a closed chamber is formed. This rammer is divided by the anchor plate 18 into an upper chamber 50 and a lower chamber 52. Due to the close guidance of the sleeve 20 in the cylindrical opening formed by the magnet 10, 12, no fluid can escape from the upper chamber 50 into this area, due to the tight guidance of the cylindrical extension in the cylindrical opening by the magnet 14, 16 is formed, an appreciable amount of fluid cannot escape from the lower chamber 52 into this area.

Die Kammern 50 und 52 schließen somit Fluid ein und beim Hin- und Herbewegen der Ankerpltte 18 von der oberen in die untere Stellung und umgekehrt wird Fluid zwischen den Kammern 50 und 52 ausgetauscht.The chambers 50 and 52 thus enclose fluid and when the anchor plate 18 is moved back and forth from the upper to the lower position and vice versa, fluid is exchanged between the chambers 50 and 52.

Erfindungsgemäß ist vorgesehen, daß die Ankerplatte umfangsmäßig dichtend an der Hülse 38 anliegt.According to the invention, it is provided that the armature plate lies circumferentially sealingly against the sleeve 38.

Dazu kann am Umfang der Ankerplatte 18 eine Nut 34 ausgebildet sein, in die ein Dichtungs- oder Kolbenring 36 eingesetzt ist. Alternativ kann auch eine Nase am Umfang der Ankerplatte 18 vorgesehen sein, die zur Innenumfangswand der Hülse 38 hin abdichtet.For this purpose, a groove 34 can be formed on the circumference of the anchor plate 18, into which a sealing or piston ring 36 is inserted. Alternatively, a lug can also be provided on the circumference of the anchor plate 18, which seals against the inner circumferential wall of the sleeve 38.

Um einen kontrollierten Austausch des Fluids zwischen den beiden Kammern zu ermöglichen, können in der Ankerplatte Drosselbohrungen 44 vorgesehen sein, durch die Fluid zwischen den Kammern 50 und 52 strömen kann.In order to enable a controlled exchange of the fluid between the two chambers, throttle bores 44 can be provided in the anchor plate, through which fluid can flow between the chambers 50 and 52.

Weiterhin, um einen Teil des Bewegungsweges, jeweils bis kurz vor dem Auftreffen auf den Polflächen, einen Fluidaustausch zwischen den Kammern zu ermöglichen, sind Überströmöffnungen 42 vorgesehen, beispielsweise in der Form von Löchern in der Hülse 38, wobei diese Löcher natürlich nach außen hin abgedichtet sein müssen. Damit kann über den mittleren Bereich des Weges der Ankerplatte, wenn sie von der Anlage an die Polflächen des einen Magneten zur Anlage an die Polfläche des anderen Magneten gelangt, außen vorbei Fluid strömen, und nur in dem Endbereich des zurückgelegten Weges, wenn die Dichtungskante 36 bzw. 40 den oberen bzw. unteren Rand des Loches 42 erreicht hat, findet kein weiteres Umströmen mehr statt, und der letzte Teil des Weges bis kurz vor dem Auftreffen der Ankerplatte 18 auf die Polfläche wird durch das dann zusammengepreßte Fluid gedämpft.Furthermore, in order to allow a part of the path of movement, until shortly before hitting the pole faces, to exchange fluid between the chambers, overflow openings 42 are provided, for example in the form of holes in the sleeve 38, these holes of course sealing off from the outside have to be. Thus, fluid can flow outside over the middle region of the path of the armature plate, when it comes from the contact to the pole faces of the one magnet to the contact to the pole face of the other magnet, and only in the end region of the path covered, when the sealing edge 36 or 40 has reached the upper or lower edge of the hole 42, there is no further flow around, and the last part of the path until shortly before the armature plate 18 strikes the pole face is dampened by the then compressed fluid.

Im Betrieb wird die Ankerplatte 18 durch das wechselseitige Erregen der Magneten 12 und 16 sowie die Beaufschlagung durch die Federn 22 und 24 hin- und herbewegt, wobei über einen großen Bereich des Weges der Widerstand durch Fluidverdrängung gering sein soll. Dazu sind die Überströmöffnungen 42 vorgesehen, die einen Austausch des Fluids zwischen den Rammern 50 und 52 ermöglichen. Erst wenn ca. 80 % bis 90 % des Gesamtweges zurückgelegt sind, verschließt sich die Überströmöffnung, da die Dichtkante 36 bzw. 40 am Außenrand der Überströmöffnung angelangt ist, und ein Fluidaustausch zwischen den Rammern 50 und 52 ist nur noch über ggf. vorgesehen Bohrungen 44 in der Ankerplatte möglich. Bei Wegfall der Bohrungen 44 kann das in der sich ständig vom Volumen her verringernden Kammer enthaltene Fluid nur noch über Undichtigkeiten der Abdichtung 40 bzw. in den sich durch Toleranz bildenden Spalten zwischen Hülse 20 und Innenumfang des Magnetkerns 10 bzw. durch den Spalte zwischen dem Fortsatz 30 und dem Innenumfang des Kernes 14 entwei-chen. Dadurch bildet sich kurz vor dem Auftreffen der Ankerplatte 18 auf den Polflächen der Magneten 10, 12 bzw. 14, 16 ein Fluidpolster, das den Aufschlag stark dämpft und somit zur Geräuschverminderung beiträgt.In operation, the armature plate 18 is reciprocated by the mutual excitation of the magnets 12 and 16 and the action by the springs 22 and 24, the resistance due to fluid displacement should be low over a large area of the path. For this purpose, the overflow openings 42 are provided, which enable an exchange of the fluid between the chambers 50 and 52. Only when approximately 80% to 90% of the total distance has been covered does the overflow opening close, since the sealing edge 36 or 40 has reached the outer edge of the overflow opening, and fluid exchange between the chambers 50 and 52 is only possible via bores which may be provided 44 possible in the anchor plate. If the bores 44 are omitted, the fluid contained in the chamber, which is constantly decreasing in volume, can only leak through the seal 40 or in the gaps formed by tolerance between the sleeve 20 and the inner circumference of the magnetic core 10 or through the gap between the extension 30 and escape the inner circumference of the core 14. This forms a fluid cushion shortly before the armature plate 18 strikes the pole faces of the magnets 10, 12 or 14, 16, which strongly dampens the impact and thus contributes to noise reduction.

Das in den Kammern 50 bzw. 52 eingeschlossene Fluid kann aus Luft bestehen, es ist jedoch auch eine Ölbedämpfung denkbar. Im Falle der Verwendung eines Ölnebels zur Schmierung setzt sich das Medium in der Kammer aus Luft und Öl zusammen.The fluid enclosed in the chambers 50 and 52 can consist of air, but oil damping is also conceivable. If an oil mist is used for lubrication, the medium in the chamber is made up of air and oil.

Claims (4)

1. A control device for a gas changeover valve of an internal combustion engine, with
a) an armature plate (18) which can move to and fro, one position of which is assigned to the open position of the gas changeover valve and the other position of which is assigned to the closed position of the gas changeover valve,
b) a first magnet coil (10), the pole faces of which the armature plate (18) approaches in one position,
c) a second magnet coil (14), the pole faces of which the armature plate (18) approaches in the other position,
d) wherein the movement of the armature plate (18) is guided in a sleeve (38),
characterised in that
e) the space between each of the pole faces is closed,
f) the armature plate (18) is provided"'at its outer periphery with sealing means (36, 40), which in contact with the inner periphery of the sleeve (38) result in mutual sealing of the upper and lower chambers (50, 52), and
g) throttle apertures (42) are provided, which facilitate the controlled escape of the compressed fluid from one chamber (50) into the other chamber (52).
2. A control device according to Claim 1, characterised in that the armature plate (18) has a sealing ring (36) inserted in a groove at its outer periphery.
3. A control device according to Claim 1, characterised in that the armature plate (18) has a projection (40) which makes contact with the inner periphery of the sleeve (38).
4. A control device according to Claim 1, characterised in that the sleeve (38) is formed in the shape of a cylinder jacket, and has holes (42) in its cylinder jacket.
EP89113912A 1988-08-09 1989-07-28 Positioning device for a gas exchange valve Expired - Lifetime EP0354417B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3826974 1988-08-09
DE3826974A DE3826974A1 (en) 1988-08-09 1988-08-09 CONTROL DEVICE FOR A GAS EXCHANGE VALVE

Publications (2)

Publication Number Publication Date
EP0354417A1 EP0354417A1 (en) 1990-02-14
EP0354417B1 true EP0354417B1 (en) 1992-05-06

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EP89113912A Expired - Lifetime EP0354417B1 (en) 1988-08-09 1989-07-28 Positioning device for a gas exchange valve
EP89908803A Pending EP0432174A1 (en) 1988-08-09 1989-07-28 Control device for a gas shuttle valve

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Application Number Title Priority Date Filing Date
EP89908803A Pending EP0432174A1 (en) 1988-08-09 1989-07-28 Control device for a gas shuttle valve

Country Status (6)

Country Link
US (1) US5223812A (en)
EP (2) EP0354417B1 (en)
JP (1) JP2656360B2 (en)
DE (2) DE3826974A1 (en)
ES (1) ES2031319T3 (en)
WO (1) WO1990001616A1 (en)

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DE10248070B4 (en) * 2001-12-11 2006-04-20 Visteon Global Technologies, Inc., Dearborn Electromagnetic valve actuation with soft stop against the valve seat

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DE19835402C1 (en) * 1998-08-05 2000-02-10 Meta Motoren Energietech Electromagnetic operating device for i.c. engine gas changing valve uses crank mechanism between magnetic armature and sahft of gas changing valve incorporated in oscillating spring system allowing use of single electromagnet
JP3921311B2 (en) * 1998-10-30 2007-05-30 株式会社日立製作所 Electromagnetic drive device for engine valve
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US6572074B2 (en) * 2001-04-18 2003-06-03 Ford Global Technologies, Llc Electromechanical valve actuator with air piston to aid in soft landing
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US7871058B2 (en) * 2007-07-25 2011-01-18 Illinois Tool Works Inc. Dual inline solenoid-actuated hot melt adhesive dispensing valve assembly
CN112412567B (en) * 2020-10-12 2021-09-07 绵阳富临精工机械股份有限公司 Cam shift electromagnetic actuator

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DE3024109A1 (en) * 1980-06-27 1982-01-21 Pischinger, Franz, Prof. Dipl.-Ing. Dr.Techn., 5100 Aachen ELECTROMAGNETIC OPERATING DEVICE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0870906A1 (en) 1997-04-08 1998-10-14 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Electromagnetic actuator for the control of a gas exchange valve of an internal combustion engine
DE10248070B4 (en) * 2001-12-11 2006-04-20 Visteon Global Technologies, Inc., Dearborn Electromagnetic valve actuation with soft stop against the valve seat

Also Published As

Publication number Publication date
EP0432174A1 (en) 1991-06-19
JP2656360B2 (en) 1997-09-24
DE58901320D1 (en) 1992-06-11
WO1990001616A1 (en) 1990-02-22
ES2031319T3 (en) 1992-12-01
US5223812A (en) 1993-06-29
EP0354417A1 (en) 1990-02-14
JPH04502192A (en) 1992-04-16
DE3826974A1 (en) 1990-02-15

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