EP1179120B1 - Servomoteur electromecanique - Google Patents

Servomoteur electromecanique Download PDF

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Publication number
EP1179120B1
EP1179120B1 EP00938542A EP00938542A EP1179120B1 EP 1179120 B1 EP1179120 B1 EP 1179120B1 EP 00938542 A EP00938542 A EP 00938542A EP 00938542 A EP00938542 A EP 00938542A EP 1179120 B1 EP1179120 B1 EP 1179120B1
Authority
EP
European Patent Office
Prior art keywords
shaft
actuator according
armature
electromagnet
actuator
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
EP00938542A
Other languages
German (de)
English (en)
Other versions
EP1179120A1 (fr
Inventor
Erwin Bauer
Wolfram Bohne
Ralf Cosfeld
Hanspeter Zink
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
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 Bayerische Motoren Werke AG, Siemens AG filed Critical Bayerische Motoren Werke AG
Publication of EP1179120A1 publication Critical patent/EP1179120A1/fr
Application granted granted Critical
Publication of EP1179120B1 publication Critical patent/EP1179120B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding
    • 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 electromechanical actuator, in particular for a gas exchange valve of an internal combustion engine.
  • a well-known electromechanical actuator (DE 197 45 522 A1) has two electromagnets and an armature, which is mechanically coupled with two springs.
  • the anchor is between a first contact surface on the first electromagnet and a second contact surface on the second electromagnet movable.
  • the housing has receptacles Recording the electromagnets.
  • the object of the invention is the known electromechanical Train actuator so that a quick Opening and closing gas exchange valves of an internal combustion engine is possible, at the same time the required Energy requirements are kept low.
  • the invention is characterized in that the hollow body trained shaft of the anchor a much smaller Mass has a solidly formed shaft. This is the mass of the armature to be moved is reduced and therefore must only small actuating forces for moving the anchor plate from one Anchor surface to be applied to the other.
  • An internal combustion engine (FIG. 1) comprises an actuator which acts on a gas exchange valve 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 of which is movably arranged in the housing 11 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 18a and a second return means 18b which are preferably designed as springs, bias the anchor plate 16 into the predetermined rest position S 0 .
  • a sensor 19b of a position sensor is preferably arranged on or in the actuator 1 in such a way that it directly or indirectly detects the position of the armature plate 16 and the armature shaft 17.
  • the actuator 1 is with the cylinder head 31 of the internal combustion engine rigidly connected.
  • the intake port 32 and a cylinder 33 with a piston 34 are in the internal combustion engine intended.
  • the piston 34 is connected to a connecting rod with a Crankshaft 36 coupled.
  • a control device 4 which the signals from Detects sensors that are designed, for example, as the Position sensor, and / or a speed sensor and / or a Load detection sensor.
  • the control device 4 controls depending of the signals from the sensors the first and second coils 13, 15 of the actuator 1.
  • the shaft 17 (FIG. 2) of the armature is designed as a hollow body. For this purpose, it has a cylindrical bore, the forms a cavity 17a.
  • the shaft 17 thus has a small one Mass, but still has a high rigidity by one to ensure stable guidance of the anchor plate.
  • a transmitter 19a is arranged at a free end of the shaft 17.
  • the encoder 19a is preferably a permanent magnet that is assigned to the position sensor.
  • the pickup 19b is preferably a magnetoresistive element, preferably as Giant magnetoresistive element formed. A special one simple and secure fixation of the encoder 19a is guaranteed by crimping the free end in an area 19c.
  • the transmitter 19a is clearly spaced from the free end the shaft 17 arranged towards the anchor plate 16.
  • the donor 19a generated magnetic field only insignificantly by a magnetic Stray field is disturbed, that at the free end of the anchor shaft is particularly pronounced and evoked is by the magnetic circuit by the first or the second electromagnet and the armature is formed.
  • the encoder 19a is preferably a potting compound 19c in the cavity 17a in the region of the free end and introduced to the encoder 19a.
  • the exact fixation of the Encoder 19a is essential for an exact position detection by the pickup 19b during a long period of operation of the actuator.
  • the cavity 17a of the anchor shaft 17 can also be used only formed in a partial area along the longitudinal axis of the shaft be so B. only in the area in which the encoder 19a is included.
  • a further reduction in the moving masses of the actuator 1 is achieved through the formation of the anchor plate 16 made of a cobalt-iron alloy. Then preferably exist also the cores 12, 14 of the electromagnets made of the cobalt-iron alloy.
  • the alloy has, for example, between 17% and 50% by weight cobalt.
  • the cobalt-iron alloy has a much higher electrical resistance than for example iron (the electrical resistance is about four times as high). As a result, the eddy current losses less in the anchor.
  • the cobalt-iron alloy has the advantage that with a magnetic Induction of about 2.3 Tesla reached saturation which is about 15% higher than that of silicon-iron alloys.
  • the armature and the core can be downsized because in this case the sizing of the core and the anchor significantly affected is due to the anchor being placed on one of the contact surfaces 15a, 15b to be applied holding force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Valve Device For Special Equipments (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Claims (7)

  1. Servomoteur électromécanique, en particulier pour une soupape de changement de gaz d'un moteur à combustion interne, composé au moins d'un électroaimant et d'un induit qui comporte une tige (17) ayant la forme d'un corps creux et qui est accouplé mécaniquement à au moins un moyen de rappel et qui peut se déplacer entre une première surface d'appui (15a) sur l'électroaimant et une autre surface d'appui (15b), caractérisé en ce qu'un transmetteur (19a) d'un détecteur est placé dans l'espace creux (17a) de la tige (17).
  2. Servomoteur selon la revendication 1, caractérisé en ce que la tige (17) a la forme d'un tube.
  3. Servomoteur selon la revendication 1, caractérisé en ce que le transmetteur (19a) est un aimant permanent.
  4. Servomoteur selon la revendication 1 ou 3, caractérisé en ce que le détecteur est un détecteur de position.
  5. Servomoteur selon la revendication 1, caractérisé en ce que le transmetteur (19a) est placé à une extrémité libre de la tige (17) dans l'espace creux (17a) et que la tige (17) est agrafée dans une zone (19c) de l'extrémité libre.
  6. Servomoteur selon l'une des revendications précédentes, caractérisé en ce que l'induit a une plaque d'induit (16) faite d'un alliage cobaltfer.
  7. Servomoteur selon l'une des revendications précédentes, caractérisé en ce que l'électroaimant a un noyau (12, 14) fait d'un alliage cobaltfer.
EP00938542A 1999-05-14 2000-05-11 Servomoteur electromecanique Expired - Lifetime EP1179120B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19922423 1999-05-14
DE19922423A DE19922423A1 (de) 1999-05-14 1999-05-14 Elektromechanischer Stellantrieb
PCT/DE2000/001483 WO2000070195A1 (fr) 1999-05-14 2000-05-11 Servomoteur electromecanique

Publications (2)

Publication Number Publication Date
EP1179120A1 EP1179120A1 (fr) 2002-02-13
EP1179120B1 true EP1179120B1 (fr) 2003-04-09

Family

ID=7908178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00938542A Expired - Lifetime EP1179120B1 (fr) 1999-05-14 2000-05-11 Servomoteur electromecanique

Country Status (5)

Country Link
US (1) US6543477B2 (fr)
EP (1) EP1179120B1 (fr)
JP (1) JP2002544758A (fr)
DE (2) DE19922423A1 (fr)
WO (1) WO2000070195A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3927043B2 (ja) * 2002-02-13 2007-06-06 株式会社山武 フィードバック機構およびバルブポジショナ
DE60317634T2 (de) * 2002-02-20 2008-10-30 Ismeca Semiconductor Holding Sa Kontaktbetätigungsglied mit kontaktkraftregelung
SE0202336D0 (sv) * 2002-07-30 2002-07-30 Siemens Elema Ab Valve assembly
JP4551698B2 (ja) * 2004-05-28 2010-09-29 株式会社小松製作所 磁界形成デバイス及びこれを用いた変位センサ
US20070040135A1 (en) * 2005-02-09 2007-02-22 Dave Dyer Surface safety systems actuator operated by electro-magnetic device
US20100140519A1 (en) * 2008-12-04 2010-06-10 General Electric Company Electromagnetic actuators
DE102009040051B4 (de) * 2009-09-03 2014-05-08 Siemens Aktiengesellschaft Freikolbenmaschine mit magnetischer Lagerung des Kolbens
US20120227690A1 (en) * 2011-03-09 2012-09-13 Giovanni Ferro Electronic Engine Control Unit And Method Of Operation

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6901404U (de) * 1969-01-05 1969-06-26 Josef Hellrung Hosenbund-zugentlastung fuer autofahrer
DE3513107A1 (de) * 1985-04-12 1986-10-16 Fleck, Andreas, 2000 Hamburg Elektromagnetisch arbeitende stelleinrichtung
DE3928066A1 (de) * 1989-08-25 1991-02-28 Binder Magnete Vorrichtung zur elektromagnetischen steuerung eines gaswechsel-ventils einer hubkolben-brennkraftmaschine
EP0419098B1 (fr) 1989-09-08 1994-11-09 Kabushiki Kaisha Toshiba Alliages magnétostrictifs cobalt-fer et leurs applications industrielles
US5144977A (en) * 1991-06-20 1992-09-08 Dresser Industries, Inc. Fluid valve with actuation sensor
DE4207275A1 (de) * 1992-03-07 1993-09-09 Kloeckner Humboldt Deutz Ag Elektromagnetischer stellantrieb
US5617417A (en) 1994-09-07 1997-04-01 Stratacom, Inc. Asynchronous transfer mode communication in inverse multiplexing over multiple communication links
DE19518056B4 (de) * 1995-05-17 2005-04-07 Fev Motorentechnik Gmbh Einrichtung zur Steuerung der Ankerbewegung einer elektromagnetischen Schaltanordnung und Verfahren zur Ansteuerung
DE19610468B4 (de) * 1995-08-08 2008-04-24 Fev Motorentechnik Gmbh Verfahren zur lastabhängigen Steuerung der Gaswechselventile an einer Kolbenbrennkraftmaschine
TW506498U (en) * 1996-12-01 2002-10-11 Tadahiro Ohmi Fluid control valve and fluid supply/exhaust system
DE19706106A1 (de) * 1997-02-17 1998-08-27 Siemens Ag Ventileinrichtung eines Verbrennungsmotors
DE29712502U1 (de) * 1997-07-15 1997-09-18 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Elektromagnetischer Aktuator mit Gehäuse
DE19745522C2 (de) * 1997-10-15 2001-03-22 Daimler Chrysler Ag Vorrichtung zur Betätigung eines Gaswechselventiles einer Hubkolbenbrennkraftmaschine
US6002670A (en) 1997-12-12 1999-12-14 Nortel Networks Corporation Optimization and recovery techniques in IMA networks
NO306038B1 (no) 1998-02-02 1999-09-06 Telenor Forskning Og Utvikling Invers-multipleksing over eksisterende telefon-tilgangslinjer

Also Published As

Publication number Publication date
JP2002544758A (ja) 2002-12-24
US20020059956A1 (en) 2002-05-23
DE50001718D1 (de) 2003-05-15
DE19922423A1 (de) 2000-11-30
EP1179120A1 (fr) 2002-02-13
US6543477B2 (en) 2003-04-08
WO2000070195A1 (fr) 2000-11-23

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