EP0429485A1 - Electromagnetically actuated control device - Google Patents

Electromagnetically actuated control device

Info

Publication number
EP0429485A1
EP0429485A1 EP89908802A EP89908802A EP0429485A1 EP 0429485 A1 EP0429485 A1 EP 0429485A1 EP 89908802 A EP89908802 A EP 89908802A EP 89908802 A EP89908802 A EP 89908802A EP 0429485 A1 EP0429485 A1 EP 0429485A1
Authority
EP
European Patent Office
Prior art keywords
valve
spring
armature plate
springs
valve stem
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.)
Pending
Application number
EP89908802A
Other languages
German (de)
French (fr)
Inventor
Peter Kreuter
Klaus-Peter Schmitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Audi AG
Original Assignee
Audi AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Publication of EP0429485A1 publication Critical patent/EP0429485A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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 electromagnetically actuated adjusting device for gas exchange valves of an internal combustion engine.
  • Such actuators are known from DE-OS 35 13 105 or DE-OS 23 35 150.
  • An armature plate oscillating back and forth between an opposing pair of magnets transmits its movement to a valve stem designed as a separate component, so that one position of the armature plate is associated with an opening of the gas exchange valve and the other position with a closure of the gas exchange valve.
  • a spring system which acts on the anchor plate from the closed to the open position, and a second spring system which acts on the upper end of the valve stem from the open to the closed position.
  • the dead center of this spring system is roughly assigned to the central position of the armature plate between the two opposite electromagnets.
  • the spring system moves the armature plate away from the magnet when the magnet is switched off and allows the system to oscillate beyond the dead center in the vicinity of the opposite magnet. If this is excited by current, the anchor plate is caught and the system for actuating the gas exchange valve has changed from the open to the closed state or vice versa.
  • the spring preload changes due to material fatigue and aging processes, so that constant conditions are not maintained over a longer operating state.
  • the invention is based on the problem of improving a system known from the prior art mentioned above in such a way that constant suspension properties of the spring systems are maintained over long operating periods.
  • a three-spring system is used in the adjusting device for the gas exchange valves, two springs of which act on the anchor plate on both sides.
  • This spring system corresponds approximately to the system that is shown in a system known from DE-OS 30 24 109 in cooperation with an integral design of the armature plate and valve stem.
  • a third spring acts on the valve stem at one end opposite the valve plate in the closed position of the valve plate.
  • the magnetic cores 10 and 12 are provided which lie opposite one another.
  • the magnetic cores 10 and 12 are designed as pot magnets and contain a coil 14 and 16, respectively.
  • the two pole faces of these pot magnets 10 and 12 lie opposite one another, an anchor plate 18 moves back and forth between them.
  • An outer sleeve 20 surrounds the system, it serves for shielding from the outside and also also for guiding the anchor plate 18.
  • a cover 32 is provided which also closes the bore 36 at the top.
  • the cover 32 is also used as an abutment for a spring 38, which will be discussed further below.
  • an extension 22 which lies in the central bore between the electromagnet 12 and contributes to guiding the armature plate 18.
  • the underside of this extension 22 is denoted by 24, it is in contact with the valve stem end 26 of a valve stem 28.
  • the valve stem 28 carries at its opposite end, not shown here, a valve disk which holds the inlet or outlet for the combustion chamber of an internal combustion engine opens or closes in a known manner.
  • a first spring system shown here as spring 38, is provided between cover 32 and anchor plate 18 in order to to act upon the anchor plate 18 in the direction of the opening of the gas exchange valve.
  • a second spring system shown here as a helical spring 40, is between. the cylinder block 30 as abutment and the lower end 24, which is connected to the anchor plate 18 via the extension 22.
  • This coil spring 40 acts on the armature plate 18 in a position which corresponds to the closed position of the gas exchange valve.
  • a spring 42 is provided, which is arranged between the cylinder block 30 and the upper end 26 of the valve stem 28 and also acts on the valve stem 28 in the direction of the closed position of the gas exchange valve.
  • the spring system 38 on one side of the armature plate 18 and the combined spring systems 40 and 42 on the other side of the armature plate 18 act on the armature plate such that the equilibrium position of the armature plate between the two opposite pole faces of the magnets 10 and 12 is approximately in the middle .
  • the spring 38 is designed to be more rigid than the spring 40, which is supported in its action by the spring 42.
  • this presupposes that there is still contact between the lower extension 24 and the upper shaft end 26 even in the closed position of the gas exchange valve.
  • the coil 14 is switched off and the coil 16 is energized.
  • the armature plate 18 is no longer held on the pole face of the pot magnet 10, the spring 38 presses the armature plate 18 in the direction of the central position between the pole faces of the magnets 10 and 12.
  • the springs 40 and 42 are compressed.
  • the springs 38 and 40 are designed differently rigid.
  • the two springs can have the same spring constant, but then a further spring must be provided in the bore 36 - an intermediate cover 32 and extension 34, which the spring 42 compensates so that the dead center of the armature plate 18 remains in the middle position between the two pole faces and the system works at least essentially symmetrically on both sides.
  • this additional spring can then only become effective over part of the path of the anchor plate 18.
  • the three-spring system shown also ensures constant spring ratios over a longer period of time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

Un dispositif de réglage de soupapes à deux voies de gaz à commande électromagnétique ouvre et ferme les soupapes à deux voies en faisant se déplacer une plaque d'induit (8) entre des électro-aimants (14, 16) opposés, et comprend une subdivision entre la plaque d'induit (18) et la tige de soupape (28). D'un côté de la plaque d'induit (18), un système de ressorts (38) pousse la plaque d'induit vers la position d'ouverture de la soupape. De l'autre côté est agencé un double système de ressorts dont une partie (40) pousse la plaque d'induit vers la position de fermeture de la soupape, alors que la deuxième partie (42) de ce système double sollicite la soupape par la tige de soupape (28) vers sa position de fermeture.An electromagnetically controlled two-way gas valve regulator opens and closes the two-way valves by moving an armature plate (8) between opposite electromagnets (14, 16), and includes a subdivision between the armature plate (18) and the valve stem (28). On one side of the armature plate (18), a spring system (38) urges the armature plate to the open position of the valve. On the other side is arranged a double system of springs of which a part (40) pushes the armature plate towards the closed position of the valve, while the second part (42) of this double system biases the valve by the valve stem (28) to its closed position.

Description

Elektromagnetiεdh betätigbare Stellvorrichtung Electromagnetically actuatable actuating device
Die Erfindung bezieht sich auf eine elektromagnetisch betätigbare Stellvorrichtung für Gaswechselventile einer Brennkraftmaschine.The invention relates to an electromagnetically actuated adjusting device for gas exchange valves of an internal combustion engine.
Derartige Stellvorrichtungen sind bekannt aus der DE-OS 35 13 105 oder der DE-OS 23 35 150.Such actuators are known from DE-OS 35 13 105 or DE-OS 23 35 150.
Eine zwischen einem gegenüberliegenden Magnetpaar hin- und heroszillierende Ankerplatte überträgt ihre Bewegung auf einen als getrenntes Bauteil ausgeführten Ventil- εchaft, so daß der einen Stellung der Ankerplatte eine Öffnung des Gaswechselventiles und der anderen Stellung eine Schließung des Gaswechselventiles zugeordnet ist.An armature plate oscillating back and forth between an opposing pair of magnets transmits its movement to a valve stem designed as a separate component, so that one position of the armature plate is associated with an opening of the gas exchange valve and the other position with a closure of the gas exchange valve.
Es ist ein Federsyεtem vorgesehen, das die Ankerplatte von der Schließ- in die Öffnungsstellung beaufschlagt, und ein zweites Federsystem, das das obere Ende des Ventilschaftes von der Offnungs- in die Schließstellung beaufschlagt. Der Totpunkt dieses Federsystems ist in etwa der Mittelstellung der Ankerplatte zwischen den beiden gegenüberliegenden Elektromagneten zugeordnet.A spring system is provided which acts on the anchor plate from the closed to the open position, and a second spring system which acts on the upper end of the valve stem from the open to the closed position. The dead center of this spring system is roughly assigned to the central position of the armature plate between the two opposite electromagnets.
Liegt im Betrieb die Ankerplatte an einem der beiden Magnete an, bewegt das Federsystem beim Abschalten des Magneten die Ankerplatte von dem Magneten weg und läßt das System bis über den Totpunkt hinaus in die Nähe des gegenüberliegenden Magneten schwingen. Wenn dieser εtromerregt ist, wird die Ankerplatte eingefangen und das System zur Betätigung des Gaswechselventiles hat von dem Offnungs- in den Schließzustand bzw. umgekehrt ge¬ wechselt. Durch Materialermüdung und Alterungsprozesεe ändert εich die FedervorSpannung, so daß über einen längeren Be- triebεzuεtand keine konεtanten Verhältnisse beibehalten werden.If the armature plate is in contact with one of the two magnets during operation, the spring system moves the armature plate away from the magnet when the magnet is switched off and allows the system to oscillate beyond the dead center in the vicinity of the opposite magnet. If this is excited by current, the anchor plate is caught and the system for actuating the gas exchange valve has changed from the open to the closed state or vice versa. The spring preload changes due to material fatigue and aging processes, so that constant conditions are not maintained over a longer operating state.
Der Erfindung liegt das Problem zugrunde, ein aus dem oben erwähnten Stand der Technik bekanntes System dahin¬ gehend zu verbesεern, daß über lange Betriebszeiträume konεtante Federungεeigenschaften der Federsysteme beibe¬ halten werden.The invention is based on the problem of improving a system known from the prior art mentioned above in such a way that constant suspension properties of the spring systems are maintained over long operating periods.
Die Aufgabe wird gelöst durch den Anspruch.The task is solved by the claim.
Erfindungsgemäß ist vorgesehen, daß bei der Stellvor¬ richtung für die Gaswechselventile ein Dreifedersystem verwendet wird, von dem zwei Federn die Ankerplatte beidseitig beaufschlagen. Dieseε Federsystem entεpricht etwa dem Syεtem, daε bei einem auε der DE-OS 30 24 109 bekannten Syεtem in Zusammenwirkung mit einer einεtücki- gen Ausbildung von Ankerplatte und Ventilschaft darge¬ stellt iεt.It is provided according to the invention that a three-spring system is used in the adjusting device for the gas exchange valves, two springs of which act on the anchor plate on both sides. This spring system corresponds approximately to the system that is shown in a system known from DE-OS 30 24 109 in cooperation with an integral design of the armature plate and valve stem.
Eine dritte Feder beaufεchlagt den Ventilεchaft an εei- nem einen, dem Ventilteller entgegenliegenden Ende in die Schließstellung des Ventiltellers.A third spring acts on the valve stem at one end opposite the valve plate in the closed position of the valve plate.
Durch diese Aufteilung deε Federεyεtemε nach den ver- εchiedenen Funktionen wird eine Konεtanz über die Le- benεdauer erreicht.Through this division of the spring system according to the different functions, a constant over the lifetime is achieved.
Bevorzugte Auεführungεformen εind in den Unteransprüchen beεchrieben.Preferred embodiments are described in the subclaims.
Im folgenden wird die Erfindung anhand der Figur erläu¬ tert.The invention is explained below with reference to the figure.
Die einzige Figur zeigt daε Prinzip einer erfindungsge- mäßen Stellvorrichtung in Schnittansicht.The only figure shows the principle of an inventive moderate adjusting device in sectional view.
Es sind zwei Magnetkerne 10 und 12 vorgesehen, die ein¬ ander gegenüberliegen. Die Magnetkerne 10 und 12 sind alε Topfmagnete ausgeführt und beeinhalten eine Spule 14 bzw. 16. Die beiden Polflächen dieser Topfmagnete 10 und 12 liegen einander gegenüber, zwischen ihnen bewegt sich eine Ankerplatte 18 hin und her. In der zentrisch in dem Topfmagneten 10 vorgesehenen Bohrung 36 ist ein Fortsatz 34 der Ankerplatte 18, der die Führung der Bewegung der Ankerplatte 18 unterstützt.Two magnetic cores 10 and 12 are provided which lie opposite one another. The magnetic cores 10 and 12 are designed as pot magnets and contain a coil 14 and 16, respectively. The two pole faces of these pot magnets 10 and 12 lie opposite one another, an anchor plate 18 moves back and forth between them. In the bore 36 provided centrally in the pot magnet 10 there is an extension 34 of the armature plate 18, which assists in guiding the movement of the armature plate 18.
Eine Außenhülse 20 umgibt das System, sie dient zur Ab¬ schirmung nach außen und außerdem ebenfalls zur Führung der Ankerplatte 18. Im oberen Bereich ist ein Deckel 32 vorgesehen, der auch die Bohrung 36 nach oben ver¬ schließt. Der Deckel 32 wird gleichzeitig als Widerlager für eine Feder 38, auf die weiter unten eingegangen wird.An outer sleeve 20 surrounds the system, it serves for shielding from the outside and also also for guiding the anchor plate 18. In the upper area, a cover 32 is provided which also closes the bore 36 at the top. The cover 32 is also used as an abutment for a spring 38, which will be discussed further below.
Auf der gegenüberliegenden Seite der Ankerplatte 18 gegenüber dem Fortsatz 34 ist ein Fortsatz 22, der in die zentrische Bohrung zwischen dem Elektromagneten 12 liegt und zur Führung der Ankerplatte 18 beiträgt. Die Unterseite dieses Fortsatzes 22 ist mit 24 bezeichnet, εie iεt in Anlage mit dem Ventilεchaftende 26 eineε Ventilεchafteε 28. Der Ventilεchaft 28 trägt an seinem gegenüberliegenden, hier nicht dargestellten Ende einen Ventilteller, der den Einlaß oder Auslaß für den Brenn¬ raum einer Brennkraftmaεchine in bekannter Weise öffnet oder schließt.On the opposite side of the armature plate 18 opposite the extension 34 is an extension 22 which lies in the central bore between the electromagnet 12 and contributes to guiding the armature plate 18. The underside of this extension 22 is denoted by 24, it is in contact with the valve stem end 26 of a valve stem 28. The valve stem 28 carries at its opposite end, not shown here, a valve disk which holds the inlet or outlet for the combustion chamber of an internal combustion engine opens or closes in a known manner.
Ein Materialblock 30, beiεpielεweiεe der Zylinderkopf, führt in einer entεprechenden Bohrung den Ventilschaft 28.A material block 30, for example the cylinder head, guides the valve stem 28 in a corresponding bore.
Ein erstes Federsyεtem, hier dargestellt als Feder 38, ist zwischen Deckel 32 und Ankerplatte 18 vorgesehen, um die Ankerplatte 18 in Richtung der Öffnung des Gaswech- εelventileε zu beaufεchlagen.A first spring system, shown here as spring 38, is provided between cover 32 and anchor plate 18 in order to to act upon the anchor plate 18 in the direction of the opening of the gas exchange valve.
Ein zweiteε Federsystem, hier dargestellt als Schrauben¬ feder 40, ist zwischen. dem Zylinderblock 30 als Widerla¬ ger und dem unteren Abschluß 24, der über den Fortεatz 22 mit der Ankerplatte 18 verbunden iεt, vorgesehen. Dieεe Schraubenfeder 40 beaufεchlagt εo it die Anker¬ platte 18 in eine Stellung, die der Schließstellung des Gaswechselventiles entspricht.A second spring system, shown here as a helical spring 40, is between. the cylinder block 30 as abutment and the lower end 24, which is connected to the anchor plate 18 via the extension 22. This coil spring 40 acts on the armature plate 18 in a position which corresponds to the closed position of the gas exchange valve.
Gleichzeitig ist eine Feder 42 vorgesehen, die zwiεchen Zylinderblock 30 und dem oberen Ende 26 deε Ventilschaf- teε 28 angeordnet ist und den Ventilschaft 28 ebenfalls in Richtung der Schließstellung des Gaswechselventiles beaufschlagt.At the same time, a spring 42 is provided, which is arranged between the cylinder block 30 and the upper end 26 of the valve stem 28 and also acts on the valve stem 28 in the direction of the closed position of the gas exchange valve.
Das Federεyεtem 38 auf der einen Seite der Ankerplatte 18 und daε kombinierte Federsystem 40 und 42 auf der anderen Seite der Ankerplatte 18 beaufschlagen die An¬ kerplatte so, daß die Gleichgewichtslage der Ankerplatte zwischen den beiden gegenüberliegenden Polflächen der Magnete 10 und 12 in etwa mittig iεt.The spring system 38 on one side of the armature plate 18 and the combined spring systems 40 and 42 on the other side of the armature plate 18 act on the armature plate such that the equilibrium position of the armature plate between the two opposite pole faces of the magnets 10 and 12 is approximately in the middle .
Auε dieεem Grunde ist die Feder 38 steifer ausgelegt alε die Feder 40, die in ihrer Wirkung ja von der Feder 42 unterstützt wird. Dabei jedoch iεt vorausgesetzt, daß auch in der Schließstellung des Gaswechselventiles wei¬ terhin eine Berührung zwischen dem unteren Ansatz 24 und dem oberen Schaftende 26 besteht.For this reason, the spring 38 is designed to be more rigid than the spring 40, which is supported in its action by the spring 42. However, this presupposes that there is still contact between the lower extension 24 and the upper shaft end 26 even in the closed position of the gas exchange valve.
Die Berührung auch für einen längeren Betrieb kann si- chergeεtellt werden durch ein hydraulisches Ventilspiel- auεgleichselement, daε zwiεchen der Berührungεεtelle des Anεatzeε 24 und deε Ventilεchaftendes 26 vorgesehen iεt und aus der Ventiltechnik für Brennkraftmaεchinen allge¬ mein bekannt iεt. Der betriebsmäßige Ablauf deε erfindungsgemäßen Systemε ist folgendermaßen:The contact, even for longer operation, can be ensured by a hydraulic valve lash adjuster, which is provided between the contact point of the attachment 24 and the valve stem end 26 and is generally known from valve technology for internal combustion engines. The operational sequence of the system according to the invention is as follows:
Es wird angenommen, daß die Ankerplätte 18 in Anlage an dem oberen Topfmagneten 10 ist, so wie eε in Fig. 1 dar- geεtellt iεt. Damit iεt die Feder 38 zusammengedrückt und die Federn 40 und 42 εind im wesentlichen entlastet. Um die Ankerplatte 18 in dieser Stellung zu halten, iεt die Spule 14 εtromdurchfloεεen.It is assumed that the anchor plate 18 is in contact with the upper pot magnet 10, as shown in FIG. 1. The spring 38 is thus compressed and the springs 40 and 42 are substantially relieved. In order to keep the anchor plate 18 in this position, the coil 14 flows through the current.
Zum Öffnen deε Gaswechselventiles wird die Spule 14 abgeschaltet und die Spule 16 erregt. Damit wird die Ankerplatte 18 nicht länger an der Polfläche des Topf¬ magneten 10 gehalten, die Feder 38 drückt die Ankerplat¬ te 18 in Richtung der Mittelstellung zwiεchen den Pol¬ flächen der Magneten 10 und 12. Dabei werden die Federn 40 und 42 komprimiert.To open the gas exchange valve, the coil 14 is switched off and the coil 16 is energized. As a result, the armature plate 18 is no longer held on the pole face of the pot magnet 10, the spring 38 presses the armature plate 18 in the direction of the central position between the pole faces of the magnets 10 and 12. The springs 40 and 42 are compressed.
Das Federsystem schwingt über den Totpunkt hinaus auf die andere Seite, dort wird die Ankerplatte 18 an der Polfläche des Topfmagneten 12 durch den Stromdurchfluß durch die Spule 16 festgehalten, die Feder 38 ist nun¬ mehr entspannt und die Federn 40 und 42 sind kompri¬ miert. Da sich die Ankerplatte um den Abstand zwischen den beiden Magneten 10 und 12 (abzüglich ihrer eigenen Dicke) verschoben hat, wird der Ventilschaft 28 um die¬ sen Betrag nach unten gedrückt und öffnet somit den Ventilteller des Gaswechselventiles..The spring system swings beyond the dead center to the other side, where the armature plate 18 is held on the pole face of the pot magnet 12 by the current flow through the coil 16, the spring 38 is now relaxed and the springs 40 and 42 are compressed . Since the anchor plate has shifted by the distance between the two magnets 10 and 12 (minus their own thickness), the valve stem 28 is pressed down by this amount and thus opens the valve plate of the gas exchange valve.
Zum erneuten Schließen des Gaswechselventiles findet der eben beεchriebene Vorgang in umgekehrter Reihenfolge εtatt.To close the gas exchange valve again, the process just described takes place in the reverse order.
Im dargestellten Auεführungsbeispiel εind die Federn 38 und 40 unterschiedlich starr ausgelegt. Die beiden Fe¬ dern können jedoch die gleiche Federkonεtante beεitzen, eε muß dann jedoch in der Bohrung 36 eine weitere Feder vorgeεehen εein zwiεchen Deckel 32 und Fortεatz 34, die die Feder 42 kompenεiert, so daß der Totpunkt der An¬ kerplatte 18 in der Mittellage zwischen den beiden Pol¬ flächen verbleibt und daε Syεtem zumindest im wesentli¬ chen nach beiden Seiten εymmetriεch arbeitet. Zwangεläu- fig kann dann dieεe zuεätzliche Feder nur über einen Teil deε Wegeε der Ankerplatte 18 wirksam werden.In the illustrated embodiment, the springs 38 and 40 are designed differently rigid. However, the two springs can have the same spring constant, but then a further spring must be provided in the bore 36 - an intermediate cover 32 and extension 34, which the spring 42 compensates so that the dead center of the armature plate 18 remains in the middle position between the two pole faces and the system works at least essentially symmetrically on both sides. Inevitably, this additional spring can then only become effective over part of the path of the anchor plate 18.
Erfindungsgemäß wurde herauεgefunden, daß daε darge¬ stellte Dreifederεyεtem auch über einen längeren Zeit¬ raum konεtante Federverhältniεεe εicherεtellt. According to the invention, it was found that the three-spring system shown also ensures constant spring ratios over a longer period of time.

Claims

P A T E N T A N S P R Ü C H E PATENT CLAIMS
1. Elektromagnetisch betätigbare Stellvorrichtung für ein Gaεwechεelventil einer Brennkraftmaεchine, mit folgendem Aufbau:1. Electromagnetically actuated adjusting device for a gas exchange valve of an internal combustion engine, with the following structure:
a) ein Elektromagnetpaar (10, 12, 14, 16) liegt ein¬ ander gegenüber,a) a pair of electromagnets (10, 12, 14, 16) lies opposite one another,
b) eine Ankerplatte (18) iεt zwischen den Magneten (10, 12, 14, 16) hin- und herbewegbar,b) an anchor plate (18) can be moved back and forth between the magnets (10, 12, 14, 16),
c) die Ankerplatte (18) ist beidseitig durch Federn (38, 40) beaufschlagt.c) the anchor plate (18) is acted upon on both sides by springs (38, 40).
d) ein auf das Gaswechεelventil arbeitender Ventil¬ schaft (28) ist von der Ankerplatte (18) getrennt ausgebildet,d) a valve stem (28) working on the gas exchange valve is formed separately from the anchor plate (18),
e) der Ventilschaft (28) wird durch eine weitere Fe¬ der (42) in Richtung Ankerplatte (18) beauf¬ schlagt,e) the valve stem (28) is acted upon by a further spring (42) in the direction of the anchor plate (18),
f) die Bewegung der Ankerplatte (18) zwischen den Magneten (10, 12, 14, 16) wird auf den Ventil¬ schaft (28) übertragen und öffnet oder schließt das Gaεwechεelventil.f) the movement of the armature plate (18) between the magnets (10, 12, 14, 16) is transmitted to the valve stem (28) and opens or closes the gas exchange valve.
2. Stellvorrichtung nach Anεpruch 1, dadurch gekenn¬ zeichnet, daß die Federn jeweilε auε einem Federsy- εtem mit Federn unterschiedlicher Steifigkeit beste¬ hen. 2. Adjusting device according to claim 1, characterized in that the springs each consist of a spring system with springs of different stiffness.
3. Stellvorrichtung nach Anεpruch 1 oder 2, dadurch gekennzeichnet, daß die Federn alε Schraubenfedern ausgebildet εind.3. Adjusting device according to claim 1 or 2, characterized in that the springs are designed as coil springs.
4. Stellvorrichtung nach einem der vorhergehenden An- εprüche, dadurch gekennzeichnet, daß daε eine Ventil- εchaftende (26) auch in Schließεtellung deε Ventilε in Anlage an einem mit der Ankerplatte (18) integral verbundenen Bauteil (24) anliegt. 4. Adjusting device according to one of the preceding claims, characterized in that daε a valve stem (26) abuts also in the closed position of the valve in contact with a component (24) integrally connected to the anchor plate (18).
EP89908802A 1988-08-09 1989-07-28 Electromagnetically actuated control device Pending EP0429485A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3826978A DE3826978A1 (en) 1988-08-09 1988-08-09 ELECTROMAGNETICALLY OPERABLE ACTUATOR
DE3826978 1988-08-09

Publications (1)

Publication Number Publication Date
EP0429485A1 true EP0429485A1 (en) 1991-06-05

Family

ID=6360501

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89113915A Expired - Lifetime EP0356713B1 (en) 1988-08-09 1989-07-28 Electromagnetically actuated positioning device
EP89908802A Pending EP0429485A1 (en) 1988-08-09 1989-07-28 Electromagnetically actuated control device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP89113915A Expired - Lifetime EP0356713B1 (en) 1988-08-09 1989-07-28 Electromagnetically actuated positioning device

Country Status (6)

Country Link
US (1) US5199392A (en)
EP (2) EP0356713B1 (en)
JP (1) JP2635428B2 (en)
DE (2) DE3826978A1 (en)
ES (1) ES2032082T3 (en)
WO (1) WO1990001614A1 (en)

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Also Published As

Publication number Publication date
EP0356713A1 (en) 1990-03-07
ES2032082T3 (en) 1993-01-01
US5199392A (en) 1993-04-06
DE3826978A1 (en) 1990-02-15
JP2635428B2 (en) 1997-07-30
EP0356713B1 (en) 1992-05-06
JPH04502190A (en) 1992-04-16
DE58901328D1 (en) 1992-06-11
WO1990001614A1 (en) 1990-02-22

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