EP1179119B1 - Electromechanical actuator - Google Patents

Electromechanical actuator Download PDF

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Publication number
EP1179119B1
EP1179119B1 EP00934868A EP00934868A EP1179119B1 EP 1179119 B1 EP1179119 B1 EP 1179119B1 EP 00934868 A EP00934868 A EP 00934868A EP 00934868 A EP00934868 A EP 00934868A EP 1179119 B1 EP1179119 B1 EP 1179119B1
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EP
European Patent Office
Prior art keywords
actuator
contact
contact element
plug connector
electromagnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00934868A
Other languages
German (de)
French (fr)
Other versions
EP1179119A1 (en
Inventor
Erwin Bauer
Hanspeter Zink
Wolfram Bohne
Wolfgang Hundt
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.)
Bayerische Motoren Werke AG
Siemens AG
Original Assignee
Bayerische Motoren Werke AG
Siemens AG
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Publication date
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Publication of EP1179119A1 publication Critical patent/EP1179119A1/en
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to an electromechanical actuator, in particular for a gas exchange valve of an internal combustion engine, according to the preamble of claim 1.
  • a well-known electromechanical actuator (DE 196 47 305 C1) has two electromagnets, each one Have coil, and an anchor that has a shaft and which is mechanically coupled with a spring.
  • the anchor is between a first contact surface on the first electromagnet and a further contact surface on the second electromagnet movable.
  • the actuator is in a cylinder head arranged an internal combustion engine.
  • the shaft of the anchor is in the de-energized state of the coils of the electromagnets non-positive with a stem of a gas exchange valve coupled.
  • the shaft of the gas exchange valve is one second spring coupled in opposite directions to the first spring acts, whereby the frictional connection between the shaft of the gas exchange valve and the shaft of the anchor is manufactured.
  • Such electromechanical actuators are also from the US 4,777,915 and EP 0 796 981 A1 are known, these then additionally each have a connector with at least a contact element that is electrically conductive with the Coil of the electromagnet is connected.
  • the actuator When installing the actuator in the cylinder head, the The shaft of the anchor plate is exactly aligned with the shaft of the Gas exchange valve are positioned. Furthermore, the first and the second spring is compressed during assembly, to bring the actuator into the mounting position. If the necessary force is not applied exactly, subject to bolts that are usually used for fixation of the actuator are used in the cylinder head, and an associated thread high tension and can thereby being damaged.
  • the object of the invention is the known actuator to develop so that it is easy and reliable on one Carrier is mountable.
  • Another object of the invention is specify a process that is reliable and simple Assembly of the actuator on the carrier guaranteed.
  • An internal combustion engine (FIG. 1) comprises an actuator 1, which acts on a gas exchange valve 2 and which is arranged in a cylinder head 31 of the internal combustion engine.
  • the gas exchange valve 2 is designed either as an outlet valve or as an inlet valve.
  • the gas exchange valve 2 has a valve stem 21 and a plate 22.
  • the actuator 1 has a housing 11 in which a first and a second electromagnet are arranged.
  • the first electromagnet has a first core 12 which is provided with a first coil 13.
  • the second electromagnet has a second core 14 which is provided with a second coil 15.
  • An armature is provided, the armature plate in the housing 11 being movably arranged between a first contact surface 15a of the first electromagnet and a second contact surface 15b of the second electromagnet.
  • the anchor plate 16 is thus movable between a closed position s maxS and an open position s maxO .
  • the armature further comprises a shaft 17 which is guided through recesses in the first and second core 12, 14 and which can be mechanically coupled to the valve shaft 21 of the gas exchange valve 2.
  • a first return means 18 a and a second return means 18 b which are preferably designed as springs, bias the anchor plate 16 into the predetermined rest position s 0 .
  • the resetting means 18a, 18b are arranged on one side on the housing 11 of the actuator toward the gas exchange valve 2 in a recess in the cylinder head 31.
  • the restoring means 18a, 18b are referred to below as springs.
  • the first spring 18a is supported on the one hand on a spring plate, which in turn rests on the housing 11, and on the other hand on a further spring plate, which is positively connected to the armature shaft 17.
  • the second spring 18b is supported on the one hand on a spring plate, which is supported on the cylinder head 31, and on the other hand on a further spring plate, which is positively connected to the valve stem 21 of the gas exchange valve.
  • the armature shaft 17 and the valve shaft 21 are aligned, that is to say positioned coaxially to one another.
  • the springs are preferably designed such that the second spring 18b is almost relaxed when the anchor plate 16 is in contact with the first contact surface 15a, and the first spring 18a is largely relaxed when the anchor plate is in contact with the second contact surface 15b.
  • the distance between the first and second contact surfaces, that is to say between the closed position s maxS and the open position s maxO is, for example, eight millimeters.
  • the actuator is also assigned a connector 51 in which Contact elements 53 are arranged, which are electrically conductive are connected to the coils 13, 15. Furthermore is on the cylinder head 31 a connector receptacle 52 is arranged. The plug 51 and the connector receptacle 52 will be discussed further below described with reference to Figures 2 and 3.
  • the actuator 1 is with the cylinder head 31 of the internal combustion engine rigidly connected He is preferably by means of Bolt fixed in a thread of the cylinder head.
  • On Intake channel 32 and a cylinder 33 with a piston 34 are provided in the internal combustion engine.
  • the piston 34 is over a connecting rod is coupled to a crankshaft 36.
  • a control device 4 is provided, which the signals from Detects sensors that are designed, for example, as one Position sensor 19 and / or a speed sensor 37 and / or a load detection sensor.
  • the control device 4 controls depending from the signal from the sensors the first and second coils 13, 15 of the actuator.
  • the plug 51 points towards the cylinder head 31 Opening in which the connector receptacle 52 is received is.
  • the contact elements 53 are either a contact pin or also designed as a leadframe.
  • the coolant is preferably designed as an engine oil.
  • the connector 51 and the connector receptacle 52 are therefore designed that when inserted into the connector 51 connector receptacle 52 the area in which the contact elements 53 the resilient trained contact elements 55 contact sealing against the coolant are completed. This may include corresponding seals on the connector 51 or the connector receptacle 52 is provided. This ensures that there are no short circuits between the contact elements can come with adjacent contact elements.
  • a recess 57 is provided in the plug 51, through a part of the Contact element 53 is passed.
  • the recess 57 and the service contacts 58 are designed so that at least during the assembly of the actuator on the cylinder head 31 the service contact 58 by means of an assembly contact element 59 is electrically contactable.
  • the actuator 1 is from above (see Figure 1) on the cylinder head 31st assembled.
  • the service contact 58 is therefore arranged in such a way that he from the side of the plug 51 facing away from the cylinder head is accessible.
  • the mounting contact element 59 With the contact element 53 contacted.
  • the mounting contact element 59 is connected to an external one Power supply connected. After contacting the first coil 13 is then energized.
  • Around the circuit To close the coil is preferably a second contact element connected with a service contact and will also contacted with a mounting contact element if the actuator not already connected to a ground connection on site is.
  • the current through the first coil is specified that the magnetic force generated in the first electromagnet sufficient to place the anchor plate in contact with the first contact surface to bring and hold there.
  • the actuator in the cylinder head is like this positioned that the stem 17 and the valve stem 21 align and fixed by bolts that are in one in the cylinder head 31 trained threads are screwed in.
  • the contacting element 59 remains in constant contact with the Service contact so that the anchor plate 16 by the force generated by the first electromagnet is held with the first contact surface 15a.
  • Service contact 58 is preferably oil-tight through the recess 57 of the plug 51 led. This ensures that it is prevented that oil during operation of the internal combustion engine Recess can pass through, which may lead to short circuits could lead between adjacent contact elements.
  • the actuator is characterized by the fact that it is simple and can be mounted precisely in the cylinder head 31.
  • the anyway existing electromagnet in the actuator used to apply the necessary force to the anchor plate to bring into contact with the first contact surface 15a and thus the free end of the shaft 17 on the side where the Spring 18a is arranged to retract so far that the actuator brought into its mounting position on the cylinder head 31 can be without the need to spring 18b compress.
  • the springs 18a, 18b are preferably conical. They preferably taper towards the spring plates 18c, 18d, which each form-fit with the anchor shaft 17 or are connected to the shaft 21 of the gas exchange valve.
  • the Conical design of the springs 18a, 18b has the advantage that compared to cylindrical springs, i.e. with even Winding diameter, have a lower mass. Furthermore, by using the conical springs Spring plates 18c, 18d can be made smaller. Through this Measures reduce the moving masses of the Actuator, so that the actuator with a higher efficiency can be operated.
  • the conical formation of the Spring provides regardless of the presence of the mounting contact element is an independent invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Description

5 Die Erfindung betrifft einen elektromechanischen Stellantrieb, insbesondere für ein Gaswechselventil einer Brennkraftmaschine, gemäß Oberbegriff des Patentanspruchs 1.5 The invention relates to an electromechanical actuator, in particular for a gas exchange valve of an internal combustion engine, according to the preamble of claim 1.

Ein bekannter elektromechanischer Stellantrieb (DE 196 47 305 C1) hat zwei Elektromagnete, die jeweils eine Spule haben, und einen Anker, der einen Schaft aufweist und der mit einer Feder mechanisch gekoppelt ist. Der Anker ist zwischen einer ersten Anlagefläche an dem ersten Elektromagneten und einer weiteren Anlagefläche an dem zweiten Elektromagneten beweglich. Der Stellantrieb ist in einem Zylinderkopf einer Brennkraftmaschine angeordnet. Der Schaft des Ankers ist in unbestromten Zustand der Spulen der Elektromagnete kraftschlüssig mit einem Schaft eines Gaswechselventils gekoppelt. Der Schaft des Gaswechselventils ist mit einer zweiten Feder gekoppelt, die gegensinnig zu der ersten Feder wirkt, wodurch der Kraftschluß zwischen dem Schaft des Gaswechselventils und dem Schaft des Ankers hergestellt wird. Derartige elektromechanische Stellantriebe sind auch aus der US 4 777 915 und der EP 0 796 981 A1 bekannt, wobei diese dann noch zusätzlich jeweils einen Stecker aufweisen mit'mindestens einem Kontaktelement, dass elektrisch leitend mit der Spule des Elektromagneten verbunden ist.A well-known electromechanical actuator (DE 196 47 305 C1) has two electromagnets, each one Have coil, and an anchor that has a shaft and which is mechanically coupled with a spring. The anchor is between a first contact surface on the first electromagnet and a further contact surface on the second electromagnet movable. The actuator is in a cylinder head arranged an internal combustion engine. The shaft of the anchor is in the de-energized state of the coils of the electromagnets non-positive with a stem of a gas exchange valve coupled. The shaft of the gas exchange valve is one second spring coupled in opposite directions to the first spring acts, whereby the frictional connection between the shaft of the gas exchange valve and the shaft of the anchor is manufactured. Such electromechanical actuators are also from the US 4,777,915 and EP 0 796 981 A1 are known, these then additionally each have a connector with at least a contact element that is electrically conductive with the Coil of the electromagnet is connected.

Bei der Montage des Stellantriebs in dem Zylinderkopf muß der Schaft der Ankerplatte genau fluchtend mit dem Schaft des Gaswechselventils positioniert werden. Ferner müssen die erste und die zweite Feder bei der Montage zusammengedrückt werden, um den Stellantrieb in die Montageposition zu bringen. Falls die dazu notwendige Kraft nicht exakt aufgebracht wird, unterliegen Schraubbolzen, die üblicherweise zur Fixierung des Stellantriebs in dem Zylinderkopf eingesetzt werden, und ein zugehöriger Gewindegang hohen Zugspannungen und können dabei beschädigt werden.When installing the actuator in the cylinder head, the The shaft of the anchor plate is exactly aligned with the shaft of the Gas exchange valve are positioned. Furthermore, the first and the second spring is compressed during assembly, to bring the actuator into the mounting position. If the necessary force is not applied exactly, subject to bolts that are usually used for fixation of the actuator are used in the cylinder head, and an associated thread high tension and can thereby being damaged.

Die Aufgabe der Erfindung ist es, den bekannten Stellantrieb so weiterzuentwickeln, daß er einfach und zuverlässig auf einen Träger montierbar ist. Eine weitere Aufgabe der Erfindungist, ein Verfahren anzugeben, das eine zuverlässige und einfache Montage des Stellantriebs auf dem Träger gewährleistet.The object of the invention is the known actuator to develop so that it is easy and reliable on one Carrier is mountable. Another object of the invention is specify a process that is reliable and simple Assembly of the actuator on the carrier guaranteed.

Die Aufgaben werden erfindungsgemäß gelöst durch die Merkmale der unabhängigen Patentansprüche.According to the invention, the objects are achieved by the features of the independent claims.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous embodiments of the invention are in the subclaims characterized.

Ausführungsbeispiele der Erfindung sind anhand der schematischen Zeichnungen näher erläutert. Es zeigen:

Figur 1
eine Anordnung des erfindungsgemäßen Stellantriebs in einer Brennkraftmaschine,
Figur 2
einen vergrößerten Ausschnitt des Stellantriebs gemäß Figur 2,
Figur 3
einen weiteren vergrößerten Ausschnitt des Stellantriebs gemäß Figur 1.
Embodiments of the invention are explained in more detail with reference to the schematic drawings. Show it:
Figure 1
an arrangement of the actuator according to the invention in an internal combustion engine,
Figure 2
3 shows an enlarged section of the actuator according to FIG. 2,
Figure 3
a further enlarged section of the actuator according to FIG. 1.

Elemente gleicher Konstruktion und Funktion sind figurenübergreifend mit den gleichen Bezugszeichen versehen.Elements of the same construction and function are common to all figures provided with the same reference numerals.

Eine Brennkraftmaschine (Figur 1) umfaßt einen Stellantrieb 1, der auf ein Gaswechselventil 2 einwirkt und der in einem Zylinderkopf 31 der Brennkraftmaschine angeordnet ist. Das Gaswechselventil 2 ist entweder als Auslaßventil oder als Einlaßventil ausgebildet. Das Gaswechselventil 2 hat einen Ventilschaft 21 und einen Teller 22. Der Stellantrieb 1 hat ein Gehäuse 11, in dem ein erster und ein zweiter Elektromagnet angeordnet sind. Der erste Elektromagnet hat ein ersten Kern 12, der mit einer ersten Spule 13 versehen ist. Der zweite Elektromagnet hat einen zweiten Kern 14, der mit einer zweiten Spule 15 versehen ist. Ein Anker ist vorgesehen, das Ankerplatte im Gehäuse 11 beweglich zwischen einer ersten Anlagefläche 15a des ersten Elektromagneten und einer zweiten Anlagefläche 15b des zweiten Elektromagneten angeordnet ist. Die Ankerplatte 16 ist somit beweglich zwischen einer Schließposition smaxS und einer Offenposition smaxO. Der Anker umfaßt desweiteren einen Schaft 17, der durch Ausnehmungen des ersten und des zweiten Kerns 12, 14 geführt ist und der mit dem Ventilschaft 21 des Gaswechselventils 2 mechanisch koppelbar ist. Ein erstes Rückstellmittel 18 a und ein zweites Rückstellmittel 18b, die vorzugsweise als Federn ausgebildet sind, spannen die Ankerplatte 16 in die vorgegebene Ruheposition s0 vor. Die Rückstellmittel 18a, 18b sind einseitig an dem Gehäuse 11 des Stellantriebs hin zu dem Gaswechselventil 2 in einer Ausnehmung des Zylinderkopfs 31 angeordnet. Die Rückstellmittel 18a, 18b werden im folgenden als Federn bezeichnet. Die erste Feder 18a stützt sich einerseits auf einen Federteller ab, der seinerseits an dem Gehäuse 11 anliegt, und andererseits an einem weiteren Federteller, der formschlüssig mit dem Ankerschaft 17 verbunden ist. Die zweite Feder 18b stützt sich einerseits auf einem Federteller ab, der sich auf dem Zylinderkopf 31 abstützt, und anderseits auf einem weiterem Federteller, der formschlüssig mit dem Ventilschaft 21 des Gaswechselventils verbunden ist. Der Ankerschaft 17 und der Ventilschaft 21 sind fluchtend, das heißt koaxial zueinander positioniert. Die Federn sind vorzugsweise so ausgebildet, daß die zweite Feder 18b nahezu entspannt ist, wenn die Ankerplatte 16 in Anlage mit der ersten Anlagefläche 15a ist, und die erste Feder 18a weitgehend entspannt ist, wenn die Ankerplatte in Anlage mit der zweite Anlagefläche 15b ist. Der Abstand zwischen der ersten und zweiten Anlagefläche, also zwischen der Schließposition smaxS und der Offenposition smaxO, beträgt beispielsweise acht Millimeter.An internal combustion engine (FIG. 1) comprises an actuator 1, which acts on a gas exchange valve 2 and which is arranged in a cylinder head 31 of the internal combustion engine. The gas exchange valve 2 is designed either as an outlet valve or as an inlet valve. The gas exchange valve 2 has a valve stem 21 and a plate 22. The actuator 1 has a housing 11 in which a first and a second electromagnet are arranged. The first electromagnet has a first core 12 which is provided with a first coil 13. The second electromagnet has a second core 14 which is provided with a second coil 15. An armature is provided, the armature plate in the housing 11 being movably arranged between a first contact surface 15a of the first electromagnet and a second contact surface 15b of the second electromagnet. The anchor plate 16 is thus movable between a closed position s maxS and an open position s maxO . The armature further comprises a shaft 17 which is guided through recesses in the first and second core 12, 14 and which can be mechanically coupled to the valve shaft 21 of the gas exchange valve 2. A first return means 18 a and a second return means 18 b, which are preferably designed as springs, bias the anchor plate 16 into the predetermined rest position s 0 . The resetting means 18a, 18b are arranged on one side on the housing 11 of the actuator toward the gas exchange valve 2 in a recess in the cylinder head 31. The restoring means 18a, 18b are referred to below as springs. The first spring 18a is supported on the one hand on a spring plate, which in turn rests on the housing 11, and on the other hand on a further spring plate, which is positively connected to the armature shaft 17. The second spring 18b is supported on the one hand on a spring plate, which is supported on the cylinder head 31, and on the other hand on a further spring plate, which is positively connected to the valve stem 21 of the gas exchange valve. The armature shaft 17 and the valve shaft 21 are aligned, that is to say positioned coaxially to one another. The springs are preferably designed such that the second spring 18b is almost relaxed when the anchor plate 16 is in contact with the first contact surface 15a, and the first spring 18a is largely relaxed when the anchor plate is in contact with the second contact surface 15b. The distance between the first and second contact surfaces, that is to say between the closed position s maxS and the open position s maxO , is, for example, eight millimeters.

Dem Stellantrieb ist ferner ein Stecker 51 zugeordnet, in dem Kontaktelemente 53 angeordnet sind, die elektrisch leitend mit den Spulen 13, 15 verbunden sind. Ferner ist an dem Zylinderkopf 31 eine Steckeraufnahme 52 angeordnet. Der Stecker 51 und die Steckeraufnahme 52 werden weiter unten noch eingehend anhand der Figuren 2 und 3 beschrieben. The actuator is also assigned a connector 51 in which Contact elements 53 are arranged, which are electrically conductive are connected to the coils 13, 15. Furthermore is on the cylinder head 31 a connector receptacle 52 is arranged. The plug 51 and the connector receptacle 52 will be discussed further below described with reference to Figures 2 and 3.

Der Stellantrieb 1 ist mit dem Zylinderkopf 31 der Brennkraftmaschine starr verbunden Er ist dazu vorzugsweise mittels Bolzen in einem Gewinde des Zylinderkopfs fixiert. Ein Ansaugkanal 32 und ein Zylinder 33 mit einem Kolben 34 sind in der Brennkraftmaschine vorgesehen. Der Kolben 34 ist über eine Pleuelstange mit einem Kurbelwelle 36 gekoppelt.The actuator 1 is with the cylinder head 31 of the internal combustion engine rigidly connected He is preferably by means of Bolt fixed in a thread of the cylinder head. On Intake channel 32 and a cylinder 33 with a piston 34 are provided in the internal combustion engine. The piston 34 is over a connecting rod is coupled to a crankshaft 36.

Eine Steuereinrichtung 4 ist vorgesehen, die die Signale von Sensoren erfaßt, die beispielsweise ausgebildet sind als ein Positionssensor 19 und/oder ein Drehzahlsensor 37 und/oder ein Lasterfassungssensor. Die Steuereinrichtung 4 steuert abhängig von dem Signal der Sensoren die erste und zweite Spule 13, 15 des Stellantriebs an.A control device 4 is provided, which the signals from Detects sensors that are designed, for example, as one Position sensor 19 and / or a speed sensor 37 and / or a load detection sensor. The control device 4 controls depending from the signal from the sensors the first and second coils 13, 15 of the actuator.

Der Stecker 51 (Figur 2) weist hin zu den Zylinderkopf 31 eine Öffnung auf, in der die Steckeraufnahme 52 aufgenommen ist. Die Kontaktelemente 53 sind entweder als Kontaktstift oder auch als Stanzgitter (Leadframe) ausgebildet. In und an der Steckeraufnahme 52 sind federnd ausgebildete Kontaktelemente angeordnet, die ebenso beispielsweise als Kontaktstifte ausgebildet sein können und die so angeordnet sind, daß sie die jeweiligen Kontaktelemente 53 des Steckers 51 im eingebauten Zustand des Stellantriebs der Brennkraftmaschine kontaktieren.The plug 51 (FIG. 2) points towards the cylinder head 31 Opening in which the connector receptacle 52 is received is. The contact elements 53 are either a contact pin or also designed as a leadframe. In and on the connector receptacle 52 are resilient contact elements arranged, which, for example, as contact pins can be formed and which are arranged so that they the respective contact elements 53 of the plug 51 in the built-in Contact the state of the actuator of the internal combustion engine.

Um eine gute Wärmeabführung von dem Stellantrieb 1 zu gewährleisten, ist dieser vorzugsweise von einem Kühlmittel umgeben. Das Kühlmittel ist vorzugsweise als Motoröl ausgebildet. Der Stecker 51 und die Steckeraufnahme 52 sind daher so ausgebildet, daß bei in den Stecker 51 eingeführte Steckeraufnahme 52 der Bereich, in dem die Kontaktelemente 53 die federnd ausgebildeten Kontaktelemente 55 kontaktieren dichtend gegenüber dem Kühlmittel abgeschlossen sind. Dazu sind gegebenenfalls entsprechende Dichtungen an dem Stecker 51 oder der Steckeraufnahme 52 vorgesehen. Damit ist gewährleistet, daß es zwischen den Kontaktelementen zu keinen Kurzschlüssen mit benachbarten Kontaktelementen kommen kann. In order to ensure good heat dissipation from the actuator 1, it is preferably surrounded by a coolant. The coolant is preferably designed as an engine oil. The connector 51 and the connector receptacle 52 are therefore designed that when inserted into the connector 51 connector receptacle 52 the area in which the contact elements 53 the resilient trained contact elements 55 contact sealing against the coolant are completed. This may include corresponding seals on the connector 51 or the connector receptacle 52 is provided. This ensures that there are no short circuits between the contact elements can come with adjacent contact elements.

In dem Stecker 51 ist eine Ausnehmung 57 vorgesehen, durch die ein als Service Kontakt 58 ausgebildeter Teilbereich des Kontaktelements 53 hindurchgeführt ist. Die Ausnehmung 57 und der Service Kontakt 58 sind dabei so ausgebildet, daß zumindest während der Montage des Stellantriebs auf den Zylinderkopf 31 der Service Kontakt 58 mittels eines Montagekontaktierelements 59 elektrisch kontaktierbar ist. Der Stellantrieb 1 wird von oben (siehe Figur 1) auf den Zylinderkopf 31 montiert. Daher ist der Service Kontakt 58 so angeordnet, daß er von der dem Zylinderkopf abgewandten Seite des Steckers 51 zugänglich ist.A recess 57 is provided in the plug 51, through a part of the Contact element 53 is passed. The recess 57 and the service contacts 58 are designed so that at least during the assembly of the actuator on the cylinder head 31 the service contact 58 by means of an assembly contact element 59 is electrically contactable. The actuator 1 is from above (see Figure 1) on the cylinder head 31st assembled. The service contact 58 is therefore arranged in such a way that he from the side of the plug 51 facing away from the cylinder head is accessible.

Zur Montage des Stellantriebes 1 auf der Zylinderkopf 31 wird zuerst das Montagekontaktelement 59 mit dem Kontaktelement 53 kontaktiert. Das Montagekontaktelement 59 ist mit einer externen Stromversorgung verbunden. Nach erfolgter Kontaktierung wird dann die erste Spule 13 bestromt. Um den Stromkreis der Spule zu schließen ist vorzugsweise ein zweites Kontaktelement mit einem Service Kontakt verbunden und wird ebenfalls mit einem Montagekontaktelement kontaktiert, falls der Stellantrieb nicht bereits bauseits mit einem Masseanschluß verbunden ist. Der Strom durch die erste Spule wird so vorgegeben, daß die im ersten Elektromagneten erzeugte Magnetkraft ausreicht, um die Ankerplatte in Anlage mit den ersten Anlagefläche zu bringen und dort zu halten.For mounting the actuator 1 on the cylinder head 31 first the mounting contact element 59 with the contact element 53 contacted. The mounting contact element 59 is connected to an external one Power supply connected. After contacting the first coil 13 is then energized. Around the circuit To close the coil is preferably a second contact element connected with a service contact and will also contacted with a mounting contact element if the actuator not already connected to a ground connection on site is. The current through the first coil is specified that the magnetic force generated in the first electromagnet sufficient to place the anchor plate in contact with the first contact surface to bring and hold there.

Anschließend wird dann der Stellantrieb im Zylinderkopf so positioniert, daß der Schaft 17 und der Ventilschaft 21 fluchten und mittels Bolzen fixiert, die in ein in dem Zylinderkopf 31 ausgebildetes Gewinde eingeschraubt werden. Dabei bleibt das Kontaktierelement 59 in ständigem Kontakt mit dem Service Kontakt, so daß die Ankerplatte 16 durch die Kraft, die durch den ersten Elektromagneten erzeugt wird, in Anlage mit den ersten Anlagefläche 15a gehalten wird. Dadurch ist mit einfachen Mitteln gewährleistet, daß der Stellantrieb exakt positioniert werden kann und die Bolzen in die Gewinde im Zylinderkopf 31 eingeschraubt werden können ohne daß die Bolzen hohen Zugkräften ausgesetzt sind. Der Service Kontakt 58 ist vorzugsweise öldicht durch die Ausnehmung 57 des Steckers 51 geführt. Somit ist gewährleistet, daß verhindert wird, daß während des Betriebes der Brennkraftmaschine Öl durch die Ausnehmung hindurch treten kann, was gegebenenfalls zu Kurzschlüssen zwischen benachbarten Kontaktelementen führen könnte.Then the actuator in the cylinder head is like this positioned that the stem 17 and the valve stem 21 align and fixed by bolts that are in one in the cylinder head 31 trained threads are screwed in. there the contacting element 59 remains in constant contact with the Service contact so that the anchor plate 16 by the force generated by the first electromagnet is held with the first contact surface 15a. This is with simple means ensures that the actuator is accurate can be positioned and the bolts in the thread in the Cylinder head 31 can be screwed in without the bolts are exposed to high tensile forces. Service contact 58 is preferably oil-tight through the recess 57 of the plug 51 led. This ensures that it is prevented that oil during operation of the internal combustion engine Recess can pass through, which may lead to short circuits could lead between adjacent contact elements.

Der Stellantrieb zeichnet sich dadurch aus, daß er einfach und präzise in dem Zylinderkopf 31 montierbar ist. Der ohnehin vorhandene Elektromagnet in dem Stellantrieb wird dabei genutzt um die nötige Kraft aufzubringen, um die Ankerplatte in Anlage mit der ersten Anlagefläche 15a zu bringen und somit das freie Ende des Schaftes 17 an der Seite, an der die Feder 18a angeordnet ist soweit zurückzuziehen, daß der Stellantrieb in seine Montageposition auf dem Zylinderkopf 31 gebracht werden kann ohne daß es notwendig ist, die Feder 18b zusammenzupressen.The actuator is characterized by the fact that it is simple and can be mounted precisely in the cylinder head 31. The anyway existing electromagnet in the actuator used to apply the necessary force to the anchor plate to bring into contact with the first contact surface 15a and thus the free end of the shaft 17 on the side where the Spring 18a is arranged to retract so far that the actuator brought into its mounting position on the cylinder head 31 can be without the need to spring 18b compress.

Die Federn 18a, 18b sind vorzugsweise konisch ausgebildet. Vorzugsweise verjüngen sie sich hin zu den Federtellern 18c, 18d, die jeweils formschlüssig mit dem Ankerschaft 17 bzw. mit dem Schaft 21 des Gaswechselventils verbunden sind. Die konische Ausbildung der Federn 18a, 18b hat den Vorteil, daß sie im Vergleich zu zylinderförmigen Federn, d.h. mit gleichmäßigen Windungsdurchmesser, eine geringere Masse aufweisen. Ferner können durch den Einsatz der konischen Federn auch die Federteller 18c, 18d kleiner ausgebildet werden. Durch diese Maßnahmen reduzieren sich insgesamt die bewegten Massen des Stellantriebs, so daß der Stellantrieb mit einem höheren Wirkungsgrad betrieben werden kann. Das konische Ausbilden der Feder stellt unabhängig von dem Vorhandensein des Montagekontaktierelements eine eigenständige Erfindung dar.The springs 18a, 18b are preferably conical. They preferably taper towards the spring plates 18c, 18d, which each form-fit with the anchor shaft 17 or are connected to the shaft 21 of the gas exchange valve. The Conical design of the springs 18a, 18b has the advantage that compared to cylindrical springs, i.e. with even Winding diameter, have a lower mass. Furthermore, by using the conical springs Spring plates 18c, 18d can be made smaller. Through this Measures reduce the moving masses of the Actuator, so that the actuator with a higher efficiency can be operated. The conical formation of the Spring provides regardless of the presence of the mounting contact element is an independent invention.

Claims (4)

  1. Electromechanical actuator with at least one electromagnet which has a coil (13) and with an armature (16) which has a shaft (17) and which is mechanically coupled to at least one means of resetting (18a, 18b) and which is movable between a first contact surface (15a) on the electromagnet and a further contact surface (15b), and with a plug connector (51) which has at least one contact element (53) which is electrically conductively connected to the coil (13) of the electromagnet, characterised in that the at least one contact element of the plug connector (51) is disposed such that, at least while the actuator is being mounted onto a bearing component, it can be contacted electrically and mechanically by means of a mounting contact element (59) on the plug connector (51), even if the plug connector (51) has been inserted into a plug connector receptacle (52).
  2. Actuator according to Claim 1 characterised in that the contact element (53) has an area designed as a service contact (55) which is inserted through an opening (57) of the plug connector (51) and which can be electrically contacted by means of a mounting contact element (59) at least while the actuator is being mounted onto the bearing component.
  3. Actuator according to Claim 2 characterised in that the service contact (55) is routed through the opening (57) in the casing of the plug connector (51) on an oil-tight basis.
  4. Method for installing an actuator according to one of the preceding claims on a bearing component, characterised in that the operations listed below are performed in the specified sequence:
    the contact element (53) is contacted with the mounting contact element (59),
    current is applied to the coil (13) of the electromagnet such that the armature plate (16) is brought into contact with the first contact surface (15a),
    the actuator is secured onto the bearing component and
    the contacting between the contact element (53) and mounting contact element (59) is removed.
EP00934868A 1999-05-14 2000-04-04 Electromechanical actuator Expired - Lifetime EP1179119B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19922425 1999-05-14
DE19922425A DE19922425C1 (en) 1999-05-14 1999-05-14 Electro-mechanical actuator
PCT/DE2000/001033 WO2000070194A1 (en) 1999-05-14 2000-04-04 Electromechanical actuator

Publications (2)

Publication Number Publication Date
EP1179119A1 EP1179119A1 (en) 2002-02-13
EP1179119B1 true EP1179119B1 (en) 2003-09-17

Family

ID=7908180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00934868A Expired - Lifetime EP1179119B1 (en) 1999-05-14 2000-04-04 Electromechanical actuator

Country Status (5)

Country Link
US (1) US6803686B2 (en)
EP (1) EP1179119B1 (en)
JP (1) JP2002544757A (en)
DE (2) DE19922425C1 (en)
WO (1) WO2000070194A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10063471A1 (en) 2000-12-19 2002-06-20 Claas Industrietechnik Gmbh Device for making contact between adjusting device and electrical connections for functional support like a hydraulic valve block, makes the adjusting device protrude from the functional support with a magnetic coil.
JP3780886B2 (en) * 2001-09-07 2006-05-31 トヨタ自動車株式会社 Valve drive device for internal combustion engine
US7059879B2 (en) * 2004-05-20 2006-06-13 Hubbell Incorporated Electrical connector having a piston-contact element

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US4777915A (en) * 1986-12-22 1988-10-18 General Motors Corporation Variable lift electromagnetic valve actuator system
DE4225329A1 (en) * 1992-07-31 1993-02-18 Dreyer Dietmar Compact and variable valve operation for IC engine - has inlet and outlet valves operated by individual solenoids controlled by CPU
EP0796981A1 (en) * 1996-03-23 1997-09-24 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Electromagnetic valve driving device in an internal combustion engine
EP0798459A2 (en) * 1996-03-30 1997-10-01 LUCAS INDUSTRIES public limited company Injection nozzle
EP0921280A1 (en) * 1997-12-09 1999-06-09 Siemens Automotive Corporation Electromagnetic actuator with stamped steel housing
EP0923090A1 (en) * 1997-12-09 1999-06-16 Siemens Automotive Corporation Electromagnetic actuator with detached lower collar to align with cylinder head bore
EP0924394A1 (en) * 1997-12-17 1999-06-23 TEMIC TELEFUNKEN microelectronic GmbH Actuator for electromagnetic valve drive

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JPH0620009B2 (en) 1984-05-24 1994-03-16 キヤノン株式会社 Coil bobbin
JPH04131734A (en) * 1990-09-25 1992-05-06 Fuji Electric Co Ltd Automatic trial connecting device for transformer
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DE19647305C1 (en) * 1996-11-15 1998-02-05 Daimler Benz Ag Electromagnetic operating device e.g. for IC engine gas-exchange valve
DE19756095C2 (en) * 1997-12-17 2001-11-22 Telefunken Microelectron Device for operating actuators for electromagnetic valve control in internal combustion engines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777915A (en) * 1986-12-22 1988-10-18 General Motors Corporation Variable lift electromagnetic valve actuator system
DE4225329A1 (en) * 1992-07-31 1993-02-18 Dreyer Dietmar Compact and variable valve operation for IC engine - has inlet and outlet valves operated by individual solenoids controlled by CPU
EP0796981A1 (en) * 1996-03-23 1997-09-24 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Electromagnetic valve driving device in an internal combustion engine
EP0798459A2 (en) * 1996-03-30 1997-10-01 LUCAS INDUSTRIES public limited company Injection nozzle
EP0921280A1 (en) * 1997-12-09 1999-06-09 Siemens Automotive Corporation Electromagnetic actuator with stamped steel housing
EP0923090A1 (en) * 1997-12-09 1999-06-16 Siemens Automotive Corporation Electromagnetic actuator with detached lower collar to align with cylinder head bore
EP0924394A1 (en) * 1997-12-17 1999-06-23 TEMIC TELEFUNKEN microelectronic GmbH Actuator for electromagnetic valve drive

Also Published As

Publication number Publication date
EP1179119A1 (en) 2002-02-13
WO2000070194A1 (en) 2000-11-23
DE50003733D1 (en) 2003-10-23
JP2002544757A (en) 2002-12-24
DE19922425C1 (en) 2000-10-19
US20020060503A1 (en) 2002-05-23
US6803686B2 (en) 2004-10-12

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