EP1029159A1 - Actionneur electromagnetique pour l'actionnement d'une soupape d'echange de gaz - Google Patents

Actionneur electromagnetique pour l'actionnement d'une soupape d'echange de gaz

Info

Publication number
EP1029159A1
EP1029159A1 EP98951332A EP98951332A EP1029159A1 EP 1029159 A1 EP1029159 A1 EP 1029159A1 EP 98951332 A EP98951332 A EP 98951332A EP 98951332 A EP98951332 A EP 98951332A EP 1029159 A1 EP1029159 A1 EP 1029159A1
Authority
EP
European Patent Office
Prior art keywords
magnet
valve
actuator
armature
permanent magnet
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.)
Withdrawn
Application number
EP98951332A
Other languages
German (de)
English (en)
Inventor
Hans Gander
Frank Kirschbaum
Günter STÖHR
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.)
Daimler 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
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1029159A1 publication Critical patent/EP1029159A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • 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
    • F01L2009/2105—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids comprising two or more coils

Definitions

  • Electromagnetic actuator for actuating a gas exchange valve
  • the invention relates to an electromagnetic actuator for actuating a gas exchange valve according to the preamble of claim 1.
  • Electrodes are used to actuate the gas exchange valves. They usually have two switching magnets, namely an opening magnet and a closing magnet, between the pole faces of which an armature can move coaxially to the longitudinal axis of the gas exchange valve.
  • the armature acts directly or via an anchor bolt on a valve stem of the gas exchange valve.
  • a preloaded spring mechanism acts on the armature.
  • two preloaded compression springs serve as the spring mechanism, namely an upper and a lower valve spring. The upper valve spring loads the gas exchange valve in the opening direction and the lower valve spring in the closing direction.
  • the armature In the case of currentless magnets, the armature is held in an equilibrium position between the magnets by the valve springs, which should generally correspond to the central position between the pole faces of the magnets for energy reasons. If the actuator is activated at start-up, either the closing magnet or the opening magnet is briefly overexcited to pull the armature out of equilibrium, or an oscillation routine is run in which the magnets are actuated alternately to set the gas exchange valve and the armature in vibration until the anchor can be caught by a magnet. In the closed position of the gas exchange valve, the armature lies against the pole face of the excited closing magnet and is held by it. The closing magnet further biases the valve spring acting in the opening direction. To open the gas exchange valve, the closing magnet is switched off and the opening magnet is switched on.
  • the valve spring acting in the opening direction accelerates the armature beyond the equilibrium position, so that it is attracted by the opening magnet.
  • the armature is decelerated by the valve spring acting in the closing direction and strikes the pole face of the opening magnet, where it is held by it.
  • the opening magnet is switched off and the closing magnet is switched on.
  • the closing process runs in the same way as the opening process.
  • an electromagnetically operated gas exchange valve for internal combustion engines is known.
  • An armature of at least two springs is held between an opening magnet and a closing magnet according to the principle of a spring mass oscillator.
  • the armature which is connected to the valve stem of the gas exchange valve, is attracted by the closing magnet when the gas exchange valve is closed, in that an opening spring is pretensioned. If the control valve opens, the closing magnet is de-energized and the opening spring brings the gas exchange valve into the open position with the assistance of the excited opening magnet.
  • controlled operation of the actuator is desirable.
  • the invention has for its object to improve the controllability of an actuator according to the preamble of claim 1. It is solved according to the invention by the features of claim 1. Further refinements result from the subclaims.
  • the known actuator principle is expanded by a moving coil drive, which serves as an actuator and speed sensor during the flight phase.
  • a valve coil of a gas exchange valve is connected to a plunger arranged coaxially to it, which is always in a radially magnetized air gap of a ring-shaped, axially magnetized permanent magnet during the movement of the valve stem, i.e. a part of the plunger coil is always in the air gap.
  • the effective number of coil turns in a homogeneous winding structure in the air gap always remains the same, ie how far the moving coil is immersed in the air gap is irrelevant.
  • the feid plentifule portion of the plunger coil in the air gap is independent of the position of front ⁇ Ve tiischaftes. As a result, the system behavior remains constant and does not change with the anchor stroke.
  • valve stem or its bearing surfaces are made of a material with a high permeability, it is advantageous that the moving coil lies radially inside the permanent magnet. If, on the other hand, the permeability of the material is low, it is advantageous if the moving coil is located radially outside the permanent magnet. This variant has the advantage of being able to develop a higher force due to the larger conductor length in the magnetic field.
  • the plunger coil is expediently located on the side of the actuator facing the valve plate, that is to say on the opening magnet side, but it can also be arranged on the opposite end side of the actuator if the valve stem is guided through the armature and the actuator. There is also the possibility of arranging diving roller drives on both sides of the actuator.
  • the voltage induced in the moving coil during movement in the magnetic field of the permanent magnet is expediently supplied as a measurement signal to an electronic control device with a microprocessor, in which the signals are processed with further parameters and parameters to corresponding control and regulating variables.
  • FIG. 1 shows a schematic cross section through an actuator according to the invention with a moving coil and a small radius
  • Fig. 2 shows a variant of Fig. 2 rr.it with a moving coil lying on a large radius.
  • An actuator 1 has an upper closing magnet 2 and a lower opening magnet 3, which act on an armature 6 when excited. This is connected to a valve stem 8 of a gas exchange valve 7 and is held by an upper valve spring 4 and a lower Ver.t lfe ⁇ er 5 m in an equilibrium position, as long as the magnets 2 and 3 are de-energized. If the actuator is activated when it is started, either the closing magnet 2 or the opening magnet 3 is briefly overexcited to pull the armature 6 out of the equilibrium position or a swelling routine takes place, in which the magnets 2 and 3 are activated alternately to set the gas exchange valve 7 and the armature 6 in vibration until the armature 6 can be caught by a magnet 2 or 3.
  • the armature 6 bears against the energized closing magnet 2.
  • the closing magnet 2 further biases the upper valve spring 4 acting in the opening direction. If the closing magnet 2 is switched off and the opening magnet 3 is switched on, the armature swings to the opening magnet 3 and a valve plate 9 of the gas exchange valve 7 lifts off from a valve seat, not shown, so that the gas exchange valve 7 opens.
  • a moving coil drive which comprises an annular, axially magnetized permanent magnet 10 and a moving coil 12, is arranged on the side of the actuator 1 facing the valve plate 9.
  • the permanent magnet 10 is integrated in the actuator 1, while the moving coil 12 is attached to a collar 15 of the valve stem 8.
  • the moving coil 12 is immersed in an axially extending air gap 11 radially magnetized by the permanent magnet 10. Energy can be supplied or withdrawn from the system via the plunger coil 12, as a result of which the movement of the gas exchange valve 7 is accelerated or decelerated.

Landscapes

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

Abstract

L'invention concerne un actionneur électromagnétique servant à l'actionnement d'une soupape d'échange de gaz. Cet actionneur comporte à la fois un aimant d'ouverture et un aimant de fermeture, entre lesquels un induit, relié à une tige de soupape, est disposé de façon à pouvoir se déplacer coaxialement. Grâce à un ressort de soupape supérieur et à un ressort de soupape inférieur pré-tendus, l'induit est maintenu, lorsque les aimants ne sont pas alimentés par un courant, dans une position d'équilibre entre les deux aimants. Pour qu'il soit possible de mieux régler l'actionneur, une bobine mobile disposée coaxialement par rapport à celui-ci est reliée à la tige de la soupape d'échange de gaz. Cette bobine pénètre dans un entrefer radialement magnétisé d'un aimant permanent annulaire à magnétisation axiale.
EP98951332A 1997-10-10 1998-08-29 Actionneur electromagnetique pour l'actionnement d'une soupape d'echange de gaz Withdrawn EP1029159A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19744714A DE19744714C1 (de) 1997-10-10 1997-10-10 Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils
DE19744714 1997-10-10
PCT/EP1998/005510 WO1999019609A1 (fr) 1997-10-10 1998-08-29 Actionneur electromagnetique pour l'actionnement d'une soupape d'echange de gaz

Publications (1)

Publication Number Publication Date
EP1029159A1 true EP1029159A1 (fr) 2000-08-23

Family

ID=7845109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98951332A Withdrawn EP1029159A1 (fr) 1997-10-10 1998-08-29 Actionneur electromagnetique pour l'actionnement d'une soupape d'echange de gaz

Country Status (4)

Country Link
US (1) US6274954B1 (fr)
EP (1) EP1029159A1 (fr)
DE (1) DE19744714C1 (fr)
WO (1) WO1999019609A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972912A1 (fr) * 1998-07-15 2000-01-19 Fuji Oozx Inc. Dispositif électrique de commande de soupape pour moteur a combustion interne
JP2000193408A (ja) * 1998-10-20 2000-07-14 Fuji Oozx Inc エンジンバルブの位置測定装置
DE19931052C2 (de) * 1999-07-06 2001-05-23 Siemens Ag Elektromagnetischer Stellantrieb
FR2797297B1 (fr) * 1999-08-06 2002-08-23 Renault Dispositif d'actionnement de soupape electrodynamique
JP2001352772A (ja) * 2000-06-06 2001-12-21 Honda Motor Co Ltd リニアアクチュエータ
DE10142670C1 (de) * 2001-08-31 2002-08-14 Bayerische Motoren Werke Ag Elektromechanischer Aktuator für Ventiltrieb
DE10207828B4 (de) * 2002-02-25 2004-10-07 Technische Universität Dresden Elektromagnetischer Hubmagnet
DE10231871A1 (de) * 2002-07-12 2004-01-22 G. Kromschröder AG Vorrichtung zum Regeln des Gasstromes zu einem Brenner
EP1388663B1 (fr) * 2002-08-05 2006-01-25 Isuzu Motors Limited Moteur Stirling
DE10322881A1 (de) * 2003-05-21 2004-12-16 Bayerische Motoren Werke Ag Elektrischer Ventiltrieb mit Elektro- und Permanentmagneten
FR2865238B1 (fr) * 2004-01-15 2006-06-30 Peugeot Citroen Automobiles Sa Actionneur electromecanique de commande de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
EP2064472B1 (fr) * 2006-09-07 2016-08-31 Fluid Automation Systems S.A. Soupape bistable
US10774696B2 (en) * 2018-02-23 2020-09-15 SentiMetal Journey, LLC Highly efficient linear motor
CN110656995B (zh) * 2019-11-08 2021-01-15 江苏科技大学 一种应用于内燃机的复合式电磁驱动全可变配气机构
CN110700916B (zh) * 2019-11-08 2021-02-05 江苏科技大学 复合式电磁驱动全可变配气机构的控制方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965377A (en) 1973-06-21 1976-06-22 Carbonneau Industries, Inc. Linear force generator
DE2458635A1 (de) 1974-12-11 1976-06-16 Wolf Klemm Vorrichtung zur steuerung von ventilen
DE3024109A1 (de) * 1980-06-27 1982-01-21 Pischinger, Franz, Prof. Dipl.-Ing. Dr.Techn., 5100 Aachen Elektromagnetisch arbeitende stelleinrichtung
JP2606740B2 (ja) 1989-05-01 1997-05-07 株式会社いすゞセラミックス研究所 バルブのステッピング駆動装置
DE19518056B4 (de) 1995-05-17 2005-04-07 Fev Motorentechnik Gmbh Einrichtung zur Steuerung der Ankerbewegung einer elektromagnetischen Schaltanordnung und Verfahren zur Ansteuerung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9919609A1 *

Also Published As

Publication number Publication date
DE19744714C1 (de) 1999-03-11
US6274954B1 (en) 2001-08-14
WO1999019609A1 (fr) 1999-04-22

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