EP0971100B1 - Magnetic protection for an electromagnetic valve actuator - Google Patents

Magnetic protection for an electromagnetic valve actuator Download PDF

Info

Publication number
EP0971100B1
EP0971100B1 EP19990112531 EP99112531A EP0971100B1 EP 0971100 B1 EP0971100 B1 EP 0971100B1 EP 19990112531 EP19990112531 EP 19990112531 EP 99112531 A EP99112531 A EP 99112531A EP 0971100 B1 EP0971100 B1 EP 0971100B1
Authority
EP
European Patent Office
Prior art keywords
actuator
magnetic field
magnetic
magnet
field sensor
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.)
Revoked
Application number
EP19990112531
Other languages
German (de)
French (fr)
Other versions
EP0971100A1 (en
Inventor
Gunther Breu
Matthias Gramann
Michael Nagel
Roger Pohlmann
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26047239&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0971100(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19843075A external-priority patent/DE19843075A1/en
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0971100A1 publication Critical patent/EP0971100A1/en
Application granted granted Critical
Publication of EP0971100B1 publication Critical patent/EP0971100B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

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
    • 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
    • F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
    • F01L2009/2132—Biasing means
    • F01L2009/2134—Helical springs
    • F01L2009/2136—Two opposed springs for intermediate resting position of the armature
    • 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
    • F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
    • F01L2009/2167—Sensing means
    • F01L2009/2169—Position sensors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8225—Position or extent of motion indicator
    • Y10T137/8242—Electrical

Definitions

  • the invention relates to an actuator for electromagnetic valve control with a device for determining the position of the anchor plate, wherein the Device consists of a magnetic field sensor and a magnetic encoder.
  • actuators for electromagnetic valve control are For example, from US 4,957,074 known.
  • An actuator for electromagnetic valve control consists essentially from the opening magnet and the closing magnet, by at least a component made of a non-ferromagnetic material separated from each other are. This component can be formed for example by a housing part become.
  • the anchor plate consisting of a ferromagnetic material, by energizing the excitation coil of the opening magnet or the exciter coil the closing magnet is moved in the respective direction.
  • the Yoke of the opening magnet has a passage for a plunger, the the forces acting on the armature plate on at least one gas exchange valve transfers.
  • the actuator may for example be designed so that the actuator spring on the the gas exchange valve opposite side of the actuator on the outside the closing magnet is arranged.
  • This is in extension of the Plunger arranged a Aktorfederteller having a push rod, which is supported by a passage in the yoke of the closing magnet.
  • the yoke of the closing magnet has a passage of the push rod surrounding, forming a wall formation in which a Internal thread is incorporated.
  • a Screwed screwed In the internal thread of the wall is a Screwed screwed, which together with the wall a cavity forms in which the resting on the Aktorfederteller actuator spring is arranged.
  • An actuator forms a functional unit with a gas exchange valve, wherein the gas exchange valve, corresponding to a conventional cylinder head with camshafts, by means of a valve spring and a valve spring plate in the valve seat of the cylinder head is pulled.
  • the anchor plate In the rest position of the functional unit is the anchor plate exactly in the middle between the opening magnet and the closing magnet, wherein the valve spring and the actuator spring are biased.
  • the valve plate the gas exchange valve In the middle position between the valve seat of the cylinder head, in which the gas exchange valve is closed is, and the position in which the gas exchange valve is open to the maximum.
  • the opening magnet and the closing magnet at exactly the right time with a precisely measured current be controlled.
  • Every points Actuator on a device for determining the position of the anchor plate, the a signal proportional to the position of the armature plate to one of the actuators transmit assigned control electronics.
  • the device is for example from a stationary, attached to the yoke of the closing magnet Magnetic field sensor, and one attached to the oscillating push rod Magnetic encoders.
  • the control electronics calculates for regulation the flight behavior of the armature plate based on the signal of the magnetic field sensor the required amperage and the times at which the opening magnet and the closing magnet are switched.
  • the magnetic field sensors sense the field strength of one of the oscillating Components of the actuator mounted magnetic encoder.
  • Such Device for determining position is from the above-mentioned US 4,957,074 known.
  • the disadvantage of this device for determining the position of the anchor plate is that the field line course of the magnetic field transmitter of the metallic, partly oscillating components of the actuator, for example the actuator spring is affected.
  • the invention has for its object to provide an actuator for electromagnetic Valve control with a magnetic field sensor and a magnetic field transmitter having device for determining the position of the anchor plate in which the field line course of the magnetic field transmitter not from the metallic, possibly oscillating, components of the actuator is affected.
  • the magnetic field sensor senses exclusively the dependent on the distance to the magnetic field sensor field strength of Magnetic encoder.
  • the magnetic shield is preferably made of a material with soft magnetic properties, causing the field lines in the magnetic Shielding be performed.
  • the closing magnet a surrounding the implementation, a wall forming formation with an internal thread, in which a ringdekkel is screwed. between the actuator spring plate and the fferdekkel is arranged an actuator spring.
  • a metallic sleeve is arranged, wherein the magnetic field sensor, the stationary is connected to the closing magnet, between the metallic sleeve and the push rod at the magnetic encoder arranged is.
  • the formed as a metallic sleeve magnetic shield is an integral part the screw cap is, where appropriate, the entire screw cap is made of a material with soft magnetic properties.
  • the magnetic field sensor is screwed with a holding device in the screw cap.
  • the magnetic field sensor as an analog Hall sensor and the magnetic field sensor as a permanent magnet is trained.
  • the following is an actuator for electromagnetic valve control with a magnetic field sensor and a magnetic encoder having Device for determining the position of the armature plate, which is a magnetic Shielding is surrounded by one embodiment illustrated and explained in connection with a figure.
  • an actuator for electromagnetic valve control with a Device for determining the position of the armature plate AP shown, the from a magnetic field sensor MS, which is designed as an analog Hall sensor, and a magnetic field generator MG, which is designed as a permanent magnet, consists.
  • the actuator consists of the yoke of the opening magnet OM and the yoke of the Closing magnet SM, which consists of two non-ferromagnetic Material manufactured spacers DS are separated from each other. Between the spacers DS oscillates the armature plate AP, on which the plunger S fixed, the forces acting on the anchor plate AP forces over a Feedthrough in the yoke of the opening magnet ⁇ M to a gas exchange valve transfers.
  • the Aktorfeder AF is located in a radially symmetrical around the implementation the push rod SS formed, forming a wall molding the yoke of the closing magnet SM.
  • the wall points to the Inside a thread into which a screw SD is screwed.
  • the bias of the actuator spring AF be changed, whereby the rest position of the armature plate AP is adjustable.
  • the screw cap SD has a central recess in the middle, in which is also incorporated an internal thread.
  • the recess is tube-like extended executed.
  • This tubular extension forms the as metallic Sleeve engineered magnetic shield MA for the end the push rod SS attached permanent magnet MG.
  • the screw cap SD and the metallic sleeve MA are made in one piece, which is why the whole screw cap SD made of a material with soft magnetic properties is made.
  • a holding device HV for the analog Hall sensor MS screwed In the internal thread of the central recess of the screw cap DS is a holding device HV for the analog Hall sensor MS screwed.
  • the analog Hall sensor MS By the screw-shaped holding device HV, the analog Hall sensor MS are adjusted in position to the permanent magnet MG. This adjustment is necessary when the center position of the anchor plate through the Turning the screw SD has been changed, which also causes the Position of the analogue Hall sensor to permanent magnet MG changed.
  • About the holding device HV also not shown electrical Wiring of the analog Hall sensor MS.
  • the metallic shield designed as a magnetic shield MA which is part of the screw cap SD, senses the analog Hall sensor MS only the distance between the analog Hall sensor and the Permanent magnet MG dependent magnetic field strength of the permanent magnet MG, whereby one of the actuators associated control unit unadulterated signal proportional to the position of the armature plate AP Available.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Valve Device For Special Equipments (AREA)

Description

Die Erfindung betrifft einen Aktor zur elektromagnetischen Ventilsteuerung mit einer Vorrichtung zur Positionsbestimmung der Ankerplatte, wobei die Vorrichtung aus einem Magnetfeldsensor und einem Magnetfeldgeber besteht. Derartige Aktoren zur elektromagnetischen Ventilsteuerung sind beispielsweise aus der US 4,957,074 bekannt.The invention relates to an actuator for electromagnetic valve control with a device for determining the position of the anchor plate, wherein the Device consists of a magnetic field sensor and a magnetic encoder. Such actuators for electromagnetic valve control are For example, from US 4,957,074 known.

Ein Aktor zur elektromagnetischen Ventilsteuerung besteht im wesentlichen aus dem Öffnermagnet und dem Schließermagnet, die durch mindestens ein Bauteil aus einem nicht ferromagnetischen Material voneinander getrennt sind. Dieses Bauteil kann beispielsweise durch ein Gehäuseteil gebildet werden. Zwischen dem Öffnermagnet und dem Schließermagnet befindet sich die aus einem ferromagnetischen Material bestehende Ankerplatte, die durch Bestromen der Erregerspule des Öffnermagneten oder der Erregerspule des schließermagneten in die jeweilige Richtung bewegt wird. Das Joch des Öffnermagneten weist eine Durchführung für einen Stößel auf, der die auf die Ankerplatte einwirkenden Kräfte auf mindestens ein Gaswechselventil überträgt.An actuator for electromagnetic valve control consists essentially from the opening magnet and the closing magnet, by at least a component made of a non-ferromagnetic material separated from each other are. This component can be formed for example by a housing part become. Located between the opening magnet and the closing magnet the anchor plate consisting of a ferromagnetic material, by energizing the excitation coil of the opening magnet or the exciter coil the closing magnet is moved in the respective direction. The Yoke of the opening magnet has a passage for a plunger, the the forces acting on the armature plate on at least one gas exchange valve transfers.

Der Aktor kann beispielsweise so ausgeführt sein, daß die Aktorfeder auf der dem Gaswechselventil entgegengesetzten Seite des Aktors an der Außenseite des schließermagneten angeordnet ist. Dazu ist in Verlängerung des Stößels eine einen Aktorfederteller aufweisende Schubstange angeordnet, die durch eine Durchführung im Joch des Schließermagneten gelagert ist. Das Joch des Schließermagneten weist eine die Durchführung der Schubstange umgebende, eine Wandung bildende Ausformung auf, in der ein Innengewinde eingearbeitet ist. In das Innengewinde der Wandung ist ein Schraubdeckel eingeschraubt, der zusammen mit der Wandung einen Hohlraum bildet, in dem die auf dem Aktorfederteller aufliegende Aktorfeder angeordnet ist. Durch verdrehen des Schraubdeckels kann die Vorspannung der Aktorfeder verändert werden, wodurch die ist die Ruhelage der Ankerplatte einstellbar ist. The actuator may for example be designed so that the actuator spring on the the gas exchange valve opposite side of the actuator on the outside the closing magnet is arranged. This is in extension of the Plunger arranged a Aktorfederteller having a push rod, which is supported by a passage in the yoke of the closing magnet. The yoke of the closing magnet has a passage of the push rod surrounding, forming a wall formation in which a Internal thread is incorporated. In the internal thread of the wall is a Screwed screwed, which together with the wall a cavity forms in which the resting on the Aktorfederteller actuator spring is arranged. By turning the screw cap, the bias The Aktorfeder be changed, which is the rest position of the anchor plate is adjustable.

Ein Aktor bildet mit einem Gaswechselventil eine funktionelle Einheit, wobei das Gaswechselventil, entsprechend einem konventionellen Zylinderkopf mit Nockenwellen, mittels einer Ventilfeder und einem Ventilfederteller in den Ventilsitz des Zylinderkopfes gezogen wird.An actuator forms a functional unit with a gas exchange valve, wherein the gas exchange valve, corresponding to a conventional cylinder head with camshafts, by means of a valve spring and a valve spring plate in the valve seat of the cylinder head is pulled.

Ist eine funktionelle Einheit aus einem Aktor und einem Gaswechselventil an der Brennkraftmaschine montiert, werden der ventilschaft des Gaswechselventils, der Stößel und die Schubstange des Aktors gegeneinander gepreßt. In der Ruhelage der funktionellen Einheit befindet sich die Ankerplatte exakt in der Mitte zwischen dem Öffnermagnet und dem Schließermagnet, wobei die Ventilfeder und die Aktorfeder vorgespannt sind. Der Ventilteller des Gaswechselventils befindet sich dabei in der Mittelstellung zwischen dem Ventilsitz des Zylinderkopfes, bei der das Gaswechselventil geschlossen ist, und der Position, in der das Gaswechselventil maximal geöffnet ist.Is a functional unit of an actuator and a gas exchange valve on the internal combustion engine mounted, the valve stem of the gas exchange valve, the plunger and the push rod of the actuator pressed against each other. In the rest position of the functional unit is the anchor plate exactly in the middle between the opening magnet and the closing magnet, wherein the valve spring and the actuator spring are biased. The valve plate the gas exchange valve is in the middle position between the valve seat of the cylinder head, in which the gas exchange valve is closed is, and the position in which the gas exchange valve is open to the maximum.

Beim Betrieb eines Aktors zur elektromagnetischen Ventilsteuerung ist es von grundlegender Bedeutung, daß der Öffnermagnet und der Schließermagnet zum exakt richtigen Zeitpunkt mit einer genau bemessenen Stromstärke angesteuert werden. Zur Bereitstellung dieser Größen weist jeder Aktor eine Vorrichtung zur Positionsbestimmung der Ankerplatte auf, die ein zur Stellung der Ankerplatte proportionales Signal an eine den Aktoren zugeordnete Steuerelektronik übermitteln. Die Vorrichtung besteht beispielsweise aus einem ortsfesten, am Joch des Schließermagneten befestigten Magnetfeldsensor, und einem an der oszillierenden Schubstange angebrachten Magnetfeldgeber. Die Steuerelektronik berechnet zur Regelung des Flugverhaltens der Ankerplatte auf Basis des Signals des Magnetfeldsensors die erforderliche Stromstärke sowie die Zeitpunkte, an denen der Öffnermagnet und der Schließermagnet geschaltet werden.When operating an actuator for electromagnetic valve control it is of fundamental importance that the opening magnet and the closing magnet at exactly the right time with a precisely measured current be controlled. To provide these sizes, everyone points Actuator on a device for determining the position of the anchor plate, the a signal proportional to the position of the armature plate to one of the actuators transmit assigned control electronics. The device is for example from a stationary, attached to the yoke of the closing magnet Magnetic field sensor, and one attached to the oscillating push rod Magnetic encoders. The control electronics calculates for regulation the flight behavior of the armature plate based on the signal of the magnetic field sensor the required amperage and the times at which the opening magnet and the closing magnet are switched.

Die Magnetfeldsensoren sensieren die Feldstärke des an einem der oszillierenden Bestandteile des Aktors angebrachten Magnetfeldgebers. Eine derartige Vorrichtung zur Positionsbestimmung ist aus der eingangs genannten US 4,957,074 bekannt.The magnetic field sensors sense the field strength of one of the oscillating Components of the actuator mounted magnetic encoder. Such Device for determining position is from the above-mentioned US 4,957,074 known.

Der Nachteil dieser Vorrichtung zur Positionsbestimmung der Ankerplatte besteht darin, daß der Feldlinienverlauf des Magnetfeldgebers von den metallischen, zum Teil oszillierenden Bestandteilen des Aktors, beispielsweise der Aktorfeder, beeinflußt wird. The disadvantage of this device for determining the position of the anchor plate is that the field line course of the magnetic field transmitter of the metallic, partly oscillating components of the actuator, for example the actuator spring is affected.

Der Erfindung liegt die Aufgabe zugrunde, einen Aktor zur elektromagnetischen Ventilsteuerung mit einer einen Magnetfeldsensor und einen Magnetfeldgeber aufweisenden Vorrichtung zur Positionsbestimmung der Ankerplatte anzugeben, bei dem der Feldlinienverlauf des Magnetfeldgebers nicht von den metallischen, gegebenenfalls oszillierenden, Bestandteilen des Aktors beeinflußt wird.The invention has for its object to provide an actuator for electromagnetic Valve control with a magnetic field sensor and a magnetic field transmitter having device for determining the position of the anchor plate in which the field line course of the magnetic field transmitter not from the metallic, possibly oscillating, components of the actuator is affected.

Diese Aufgabe wird erfindungsgemäß durch das Merkmal des Patentanspruchs 1 gelöst, wobei der Magnetfeldsensor und der Magnetfeldgeber von einer magnetischen Abschirmung umgeben sind.This object is achieved by the feature of the claim 1 solved, wherein the magnetic field sensor and the magnetic encoder surrounded by a magnetic shield.

Durch die magnetische Abschirmung sensiert der Magnetfeldsensor ausschließlich die vom Abstand zum Magnetfeldgeber abhängige Feldstärke des Magnetfeldgebers.Due to the magnetic shield, the magnetic field sensor senses exclusively the dependent on the distance to the magnetic field sensor field strength of Magnetic encoder.

Die magnetische Abschirmung besteht vorzugsweise aus einem Material mit weichmagnetischen Eigenschaften, wodurch die Feldlinien in der magnetischen Abschirmung geführt werden.The magnetic shield is preferably made of a material with soft magnetic properties, causing the field lines in the magnetic Shielding be performed.

Am der Ankerplatte entgegengesetzten Ende der einen Aktorfederteller aufweisenden Schubstange ist der Magnetfeldgeber befestigt. Dabei weist der Schließermagnet eine die Durchführung umgebende, eine Wandung bildende Ausformung mit einem Innengewinde auf, in der ein Schraubdekkel eingeschraubt ist. zwischen dem Aktorfederteller und dem Schraubdekkel ist eine Aktorfeder angeordnet. Als magnetische Abschirmung ist zwischen der Aktorfeder und der Schubstange, an der der Magnetfeldgeber befestigt ist, eine metallische Hülse angeordnet, wobei der Magnetfeldsensor, der ortsfest mit dem Schließermagnet verbunden ist, zwischen der metallischen Hülse und der Schubstange bei dem Magnetfeldgeber angeordnet ist.At the anchor plate opposite end of the Aktorfederteller having push rod is attached to the magnetic encoder. It points the closing magnet a surrounding the implementation, a wall forming formation with an internal thread, in which a Schraubdekkel is screwed. between the actuator spring plate and the Schraubdekkel is arranged an actuator spring. As a magnetic shield is between the actuator spring and the push rod on which the magnetic encoder fixed, a metallic sleeve is arranged, wherein the magnetic field sensor, the stationary is connected to the closing magnet, between the metallic sleeve and the push rod at the magnetic encoder arranged is.

In einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, daß die als metallische Hülse ausgebildete magnetische Abschirmung ein Bestandteil des Schraubdeckels ist, wobei gegebenenfalls der gesamte Schraubdeckel aus einem Material mit weichmagnetischen Eigenschaften gefertigt ist.In an advantageous embodiment of the invention it is provided that the formed as a metallic sleeve magnetic shield is an integral part the screw cap is, where appropriate, the entire screw cap is made of a material with soft magnetic properties.

In eine weiteren weiterbildung ist vorgesehen, daß der Magnetfeldsensor mit einer Haltevorrichtung in den Schraubdeckel eingeschraubt ist. In a further development is provided that the magnetic field sensor is screwed with a holding device in the screw cap.

In einer letzten vorteilhaften Weiterbildung ist vorgesehen, daß der Magnetfeldsensor als analoger Hallsensor und der Magnetfeldgeber als Permanentmagnet ausgebildet ist.In a last advantageous development, it is provided that the magnetic field sensor as an analog Hall sensor and the magnetic field sensor as a permanent magnet is trained.

Im folgenden wird ein Aktor zur elektromagnetischen Ventilsteuerung mit einer einen Magnetfeldsensor und einen Magnetfeldgeber aufweisenden Vorrichtung zur Positionsbestimmung der Ankerplatte, die von einer magnetischen Abschirmung umgeben ist, anhand von einem Ausführungsbeispiel im Zusammenhang mit einer Figur dargestellt und erläutert.The following is an actuator for electromagnetic valve control with a magnetic field sensor and a magnetic encoder having Device for determining the position of the armature plate, which is a magnetic Shielding is surrounded by one embodiment illustrated and explained in connection with a figure.

Es zeigt:

Figur
die schematische Darstellung eines Aktors zur elektromagnetischen Ventilsteuerung mit einer Vorrichtung zur Positionsbestimmung der Ankerplatte, die von einer magnetischen Abschirmung umgeben ist.
It shows:
figure
the schematic representation of an actuator for electromagnetic valve control with a device for determining the position of the armature plate, which is surrounded by a magnetic shield.

In der Figur ist ein Aktor zur elektromagnetischen Ventilsteuerung mit einer Vorrichtung zur Positionsbestimmung der Ankerplatte AP dargestellt, die aus einem Magnetfeldsensor MS, der als analoger Hallsensor ausgebildet ist, und einem Magnetfeldgeber MG, der als Permanentmagnet ausgebildet ist, besteht.In the figure, an actuator for electromagnetic valve control with a Device for determining the position of the armature plate AP shown, the from a magnetic field sensor MS, which is designed as an analog Hall sensor, and a magnetic field generator MG, which is designed as a permanent magnet, consists.

Der Aktor besteht aus dem Joch des Öffnermagneten ÖM und dem Joch des Schließermagneten SM, die durch zwei aus einem nicht ferromagnetischen Material gefertigte Distanzstücke DS voneinander getrennt werden. Zwischen den Distanzstücken DS oszilliert die Ankerplatte AP, an der der Stößel S befestigt, der die auf die Ankerplatte AP einwirkenden Kräfte über eine Durchführung im Joch des Öffnermagneten ÖM auf ein Gaswechselventil überträgt.The actuator consists of the yoke of the opening magnet OM and the yoke of the Closing magnet SM, which consists of two non-ferromagnetic Material manufactured spacers DS are separated from each other. Between the spacers DS oscillates the armature plate AP, on which the plunger S fixed, the forces acting on the anchor plate AP forces over a Feedthrough in the yoke of the opening magnet ÖM to a gas exchange valve transfers.

In der Verlängerung des Stößels S liegt auf der Ankerplatte AP eine Schubstange SS auf, die in einer Durchführung in dem Joch des schließermagneten SM gelagert ist, und die die auf die Ankerplatte AP einwirkenden Kräfte auf die Aktorfeder AF überträgt. Dazu ist an dem der Ankerplatte AP entgegengesetzten Ende der Schubstange SS ein Aktorfederteller AFT ausgearbeitet, auf dem die Aktorfeder AF aufliegt, und über den die Aktorfeder AF die Schubstange SS gegen die Ankerplatte AP preßt. Auf der Seite des Aktorfedertellers AFT ist in der Schubstange SS ein axiales Innengewinde eingearbeitet, in das ein Magnethalter MH zur Aufnahme des Permanentmagneten MG eingeschraubt wird.In the extension of the plunger S is on the anchor plate AP a push rod SS on, in a passage in the yoke of the closing magnet SM is stored, and the forces acting on the armature plate AP forces transfers to the actuator spring AF. This is opposite to the anchor plate AP End of the push rod SS A Aktorfederteller AFT worked out, on which the Aktorfeder AF rests, and on the Aktorfeder AF the Push rod SS against the anchor plate AP presses. On the side of the actuator spring plate AFT is incorporated in the push rod SS an axial internal thread, in a magnet holder MH for receiving the permanent magnet MG is screwed.

Die Aktorfeder AF befindet sich in einer radialsymmetrisch um die Durchführung der Schubstange SS ausgebildeten, eine Wandung bildende Ausformung des Jochs des Schließermagneten SM. Die Wandung weist auf der Innenseite ein Gewinde auf, in das ein Schraubdeckel SD eingeschraubt ist. Mittels des Schraubdeckels SD kann die Vorspannung der Aktorfeder AF verändert werden, wodurch die Ruhelage der Ankerplatte AP einstellbar ist.The Aktorfeder AF is located in a radially symmetrical around the implementation the push rod SS formed, forming a wall molding the yoke of the closing magnet SM. The wall points to the Inside a thread into which a screw SD is screwed. By means of the screw SD, the bias of the actuator spring AF be changed, whereby the rest position of the armature plate AP is adjustable.

Der Schraubdeckel SD weist in der Mitte eine zentrische Aussparung auf, in der ebenfalls ein Innengewinde eingearbeitet ist. Die Aussparung ist rohrartig verlängert ausgeführt. Diese rohrartige Verlängerung bildet die als metallische Hülse ausgeführte magnetische Abschirmung MA für den am Ende der Schubstange SS befestigten Permanentmagnet MG. Der Schraubdeckel SD und die metallische Hülse MA sind dabei einteilig ausgeführt, weshalb der ganze Schraubdeckel SD aus einem Material mit weichmagnetischen Eigenschaften gefertigt ist.The screw cap SD has a central recess in the middle, in which is also incorporated an internal thread. The recess is tube-like extended executed. This tubular extension forms the as metallic Sleeve engineered magnetic shield MA for the end the push rod SS attached permanent magnet MG. The screw cap SD and the metallic sleeve MA are made in one piece, which is why the whole screw cap SD made of a material with soft magnetic properties is made.

In das Innengewinde der zentrischen Aussparung des Schraubdeckels DS ist eine Haltevorrichtung HV für den analoger Hallsensor MS eingeschraubt. Durch die schraubbar gestaltete Haltevorrichtung HV kann der analoge Hallsensor MS in seiner Position zum Permanentmagnet MG justiert werden. Diese Justage ist notwendig, wenn die Mittellage der Ankerplatte durch das Verdrehen des Schraubdeckels SD verändert wurde, wodurch sich auch die Position des analogen Hallsensors zum Permanentmagnet MG verändert. Über die Haltevorrichtung HV erfolgt zudem die nicht dargestellte elektrische Verkabelung des analogen Hallsensors MS.In the internal thread of the central recess of the screw cap DS is a holding device HV for the analog Hall sensor MS screwed. By the screw-shaped holding device HV, the analog Hall sensor MS are adjusted in position to the permanent magnet MG. This adjustment is necessary when the center position of the anchor plate through the Turning the screw SD has been changed, which also causes the Position of the analogue Hall sensor to permanent magnet MG changed. About the holding device HV also not shown electrical Wiring of the analog Hall sensor MS.

Durch die als metallische Hülse ausgebildete magnetische Abschirmung MA, die Bestandteil des Schraubdeckels SD ist, sensiert der analoger Hallsensor MS lediglich die von Abstand zwischen dem analogen Hallsensor und dem Permanentmagnet MG abhängige magnetische Feldstärke des Permanentmagneten MG, wodurch einer den Aktoren zugeordneten Steuereinheit ein unverfälschtes, zur Position der Ankerplatte AP proportionales Signal zur Verfügung steht.By the metallic shield designed as a magnetic shield MA, which is part of the screw cap SD, senses the analog Hall sensor MS only the distance between the analog Hall sensor and the Permanent magnet MG dependent magnetic field strength of the permanent magnet MG, whereby one of the actuators associated control unit unadulterated signal proportional to the position of the armature plate AP Available.

Claims (6)

  1. Actuator for electromagnetically controlling a valve with a closing magnet (ÖM) and an opening magnet (SM), between which an anchor plate (AP) oscillates, having a device with a magnetic field sensor (MS) and a magneticfield transmitter (MG) for determining the position of the anchor plate (AP), characterised in that the magnetic field transmitter (MG) and the magnetic field sensor (MS) are surrounded by a magnetic screen (MA).
  2. Actuator as claimed in claim 1, characterised in that the magnetic screen (MA) is made from a material with soft magnetic properties.
  3. Actuator as claimed in claim 1 or 2, characterised in that a plunger (S) is attached to the anchor plate (AP) and in an extension of the plunger (S) is a push-rod (SS) with an actuator spring plate (AFT), disposed so as to oscillate with the anchor plate (AP) and to which the permanent magnet (MG) is attached, and which is mounted in a bush in the opening magnet (SM), the opening magnet (SM) being of a shape forming a wall surrounding the bush and having an internal thread into which a screw cap (SD) is screwed, an actuator spring (AF) being provided between the actuator spring plate (AFT) and the screw cap (SD) and a metal sleeve serving as a magnetic screen (MA) being arranged between the actuator spring (AF) and the push-rod (SS), and the magnetic field sensor (MS) is attached to the opening magnet (SM) in a stationary arrangement disposed between the metal sleeve and the region of the push-rod (SS) where the magnetic field transmitter (MG) is mounted.
  4. Actuator as claimed in claim 3, characterised in that the metal sleeve serving as a magnetic screen (MA) is an integral part of the screw cap (SD).
  5. Actuator as claimed in claim 3 or 4, characterised in that the magnetic field sensor (MS) is screwed into the screw cap (SD) with a retaining device.
  6. Actuator as claimed in one of the preceding claims, characterised in that the magnetic field sensor (MS) is an analogue Hall sensor and the magnetic field transmitter (MG) is a permanent magnet.
EP19990112531 1998-07-07 1999-07-01 Magnetic protection for an electromagnetic valve actuator Revoked EP0971100B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19830233 1998-07-07
DE19830233 1998-07-07
DE19843075 1998-09-19
DE19843075A DE19843075A1 (en) 1998-07-07 1998-09-19 Magnetic shielding of an actuator for electromagnetic valve control

Publications (2)

Publication Number Publication Date
EP0971100A1 EP0971100A1 (en) 2000-01-12
EP0971100B1 true EP0971100B1 (en) 2003-09-03

Family

ID=26047239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990112531 Revoked EP0971100B1 (en) 1998-07-07 1999-07-01 Magnetic protection for an electromagnetic valve actuator

Country Status (3)

Country Link
US (1) US6213147B1 (en)
EP (1) EP0971100B1 (en)
ES (1) ES2205648T3 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001221653A (en) * 1999-12-01 2001-08-17 Honda Motor Co Ltd Displacement detector
JP3689614B2 (en) * 2000-03-21 2005-08-31 株式会社日立製作所 Magnet fixing method for position measuring device
US7004120B2 (en) * 2003-05-09 2006-02-28 Warren James C Opposed piston engine
US20040246649A1 (en) * 2003-06-03 2004-12-09 Mks Instruments, Inc. Flow control valve with magnetic field sensor
JP2005351218A (en) * 2004-06-11 2005-12-22 Toyota Motor Corp Electromagnetically driven valve
NZ540311A (en) * 2004-06-19 2006-11-30 Inventio Ag Drive for a lift installation
US7284570B1 (en) 2005-02-16 2007-10-23 The United States Of America As Represented By The Secretary Of The Navy Electrically powered valve for controlling, monitoring and evaluating fluid flow
FR2955168B1 (en) * 2010-01-14 2012-02-10 Mann & Hummel Gmbh CONTROL VALVE FOR LIQUID CIRCULATION CIRCUIT
AT512065A1 (en) * 2011-10-27 2013-05-15 Msg Mechatronic Systems Gmbh BISTABLE SWITCH MAGNET WITH PISTON POSITION DETECTOR
EP2926042B1 (en) * 2012-11-30 2020-02-12 Petrolvalves S.p.A. Continuous magnetic motion position indicator
EP2966287B1 (en) * 2014-07-07 2019-08-28 Goodrich Actuation Systems Ltd. Pressure switch for thrust reverser control
WO2016194207A1 (en) * 2015-06-04 2016-12-08 三菱電機株式会社 Electromagnetic actuator
KR102087733B1 (en) * 2019-03-14 2020-03-11 동주에이피 주식회사 Control Valve Having Magnetic Shielding Cover
US20240052947A1 (en) * 2022-08-15 2024-02-15 Fmc Technologies, Inc. Valve position sensor

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896280A (en) * 1974-03-13 1975-07-22 Us Army Valve position indicator
US4603707A (en) * 1983-08-02 1986-08-05 Motorola, Inc. Purge block for gas systems
US4619288A (en) * 1985-11-06 1986-10-28 Pneumo Corporation Adjustable transducer and lock mechanism for monitoring valve position
DE3616540A1 (en) * 1986-05-16 1987-11-19 Porsche Ag DEVICE FOR ACTUATING A GAS EXCHANGE VALVE OF A PISTON PISTON COMBUSTION ENGINE
US4777979A (en) * 1987-11-16 1988-10-18 Westinghouse Electric Corp. Position detector for clapper of non-return valve
US4825904A (en) * 1988-04-18 1989-05-02 Pneumo Abex Corporation Two position flow control valve assembly with position sensing
US4953590A (en) * 1988-04-22 1990-09-04 Tokyo Keiki Company Ltd. Electromagnetic directional control valve
US4914388A (en) * 1988-06-30 1990-04-03 Eaton Corporation Dual output sensor for detecting the proximity of a reciprocating member
US5111092A (en) * 1991-03-01 1992-05-05 Marotta Scientific Controls, Inc. Device for sensing reciprocated armature position
US5144977A (en) * 1991-06-20 1992-09-08 Dresser Industries, Inc. Fluid valve with actuation sensor
US5257014A (en) * 1991-10-31 1993-10-26 Caterpillar Inc. Actuator detection method and apparatus for an electromechanical actuator
DE4142996A1 (en) * 1991-12-24 1993-07-01 Bosch Gmbh Robert METHOD FOR MEASURING THE MECHANICAL MOVEMENT OF A SOLENOID VALVE ARMOR, ESPECIALLY ELECTRICALLY CONTROLLED INJECTION SYSTEMS
US5236012A (en) * 1993-01-07 1993-08-17 Prochef Incorporated Electromagnetic valve with actuation-indicating means
GB9306980D0 (en) * 1993-04-03 1993-05-26 Blp Components Ltd Solenoid valves
US5522414A (en) * 1994-03-30 1996-06-04 G. P. Reeves, Inc. Flow sensor
US5787915A (en) * 1997-01-21 1998-08-04 J. Otto Byers & Associates Servo positioning system
JPH10274016A (en) * 1997-03-28 1998-10-13 Fuji Heavy Ind Ltd Electromagnetic valve system control device
US5769043A (en) * 1997-05-08 1998-06-23 Siemens Automotive Corporation Method and apparatus for detecting engine valve motion
US5975131A (en) * 1997-10-10 1999-11-02 Theisen; Terry J. Tank valve and opening sensor

Also Published As

Publication number Publication date
US6213147B1 (en) 2001-04-10
ES2205648T3 (en) 2004-05-01
EP0971100A1 (en) 2000-01-12

Similar Documents

Publication Publication Date Title
EP0971100B1 (en) Magnetic protection for an electromagnetic valve actuator
AT517489B1 (en) HOLLOWING MACHINE, IN PARTICULAR FUEL POWER MACHINE, WITH AT LEAST ONE LENGTH-ADJUSTABLE CONNECTING BAR
DE102009015833B4 (en) Electromagnetic actuator
WO1999013202A1 (en) Electromagnetically actuatable adjustment device and operational method therefor
DE4142996A1 (en) METHOD FOR MEASURING THE MECHANICAL MOVEMENT OF A SOLENOID VALVE ARMOR, ESPECIALLY ELECTRICALLY CONTROLLED INJECTION SYSTEMS
DE19608676C1 (en) Closure nozzle for a tool mold for processing plastic masses, in particular for a plastic injection mold
DE19736647A1 (en) Electromagnetically operated valve drive system
DE8529250U1 (en) Pneumatic or hydraulic shock absorber
WO1998036160A1 (en) Internal combustion engine valve device
WO1998038656A1 (en) Motion recognition process, in particular for regulating the impact speed of an armature on an electromagnetic actuator, and actuator for carrying out the process
DE3335169A1 (en) FUEL INJECTION DEVICE
DE20100950U1 (en) Electromagnetic actuator
EP1217273B1 (en) Solenoid valve
DE19935428C1 (en) Actuator for electromagnetic valve control has two electromagnets, oscillating armature plate, two-part screen divided by thin axial gap in which magnetic field sensor is arranged
DE19843075A1 (en) Magnetic shielding of an actuator for electromagnetic valve control
DE68908130T2 (en) Electromagnetic valve for internal combustion engines.
DE102004013413B4 (en) Fuel injection valve
DE19922423A1 (en) Electromechanical actuator
DE3519348C2 (en) A device producing a linear feed movement
DE10023654A1 (en) Armature position detector e.g. for measuring speed of drive actuator of gas shuttle valve of internal combustion engine, has permanent magnet whose surface facing magnetic field detector is concave
DE19914590C1 (en) Actuator for electromagnetic valve controller has magnetic field generator in form of injection moulded part mounted on one of its oscillating components
DE19846418A1 (en) Hydraulic valve has sensor with sensing element in contact with peripheral valve piston contact area generating electrical or electronic signal depending on piston position changes
DE19830667A1 (en) Device to determine opening and closing instant of valve with longitudinally guided closing member has closing member guided in electrically insulated fashion and forming electrode of condenser whose other electrode is valve seat
EP3070721B1 (en) Actuation device
DE69517308T2 (en) MAGNETIC ACTUATOR WITH MULTIPLE AIR GAPS

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20000516

AKX Designation fees paid

Free format text: DE ES FR GB IT SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CONTI TEMIC MICROELECTRONIC GMBH

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DAIMLERCHRYSLER AG

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59906828

Country of ref document: DE

Date of ref document: 20031009

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20031231

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2205648

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: FEV MOTORENTECHNIK GMBH

Effective date: 20040603

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050621

Year of fee payment: 7

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050712

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20050714

Year of fee payment: 7

Ref country code: DE

Payment date: 20050714

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20050720

Year of fee payment: 7

RDAF Communication despatched that patent is revoked

Free format text: ORIGINAL CODE: EPIDOSNREV1

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 20050808

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 20050808

REG Reference to a national code

Ref country code: SE

Ref legal event code: ECNC

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060731

Year of fee payment: 8