EP0748416A1 - Regulateur a commande electromagnetique - Google Patents

Regulateur a commande electromagnetique

Info

Publication number
EP0748416A1
EP0748416A1 EP95942673A EP95942673A EP0748416A1 EP 0748416 A1 EP0748416 A1 EP 0748416A1 EP 95942673 A EP95942673 A EP 95942673A EP 95942673 A EP95942673 A EP 95942673A EP 0748416 A1 EP0748416 A1 EP 0748416A1
Authority
EP
European Patent Office
Prior art keywords
armature
actuator
spring element
spring
adjusting device
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.)
Granted
Application number
EP95942673A
Other languages
German (de)
English (en)
Other versions
EP0748416B1 (fr
Inventor
Thomas Esch
Martin Pischinger
Michael Schebitz
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.)
FEV Europe GmbH
Original Assignee
FEV Motorentechnik GmbH and Co KG
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 FEV Motorentechnik GmbH and Co KG filed Critical FEV Motorentechnik GmbH and Co KG
Priority to EP00123025A priority Critical patent/EP1069285B1/fr
Publication of EP0748416A1 publication Critical patent/EP0748416A1/fr
Application granted granted Critical
Publication of EP0748416B1 publication Critical patent/EP0748416B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

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

Definitions

  • Electromagnetically actuated actuating devices in particular actuating devices of this type for actuating gas exchange valves on internal combustion engines, are known, for example from EP-A-0 043 426 and EP-A-0 197 357.
  • the designs known from these publications have a specific power-to-weight ratio and require a large amount of space , so that they in the applicational as adjusting devices for 'gas-exchange valves of internal combustion engines of modern design, particularly those with multi-valve operation, can not be used.
  • the invention has for its object to simplify the structure of the known electromagnetic actuating devices and thus to achieve a more compact, space-saving design.
  • an electromagnetic actuating device which has at least one push rod, which acts on the actuating member to be actuated and which is connected to an armature which can be moved back and forth between the pole faces of two electromagnets arranged at an axial distance from one another is guided and which is held in an intermediate position between the pole faces by at least two spring elements acting against one another when the electromagnet is de-energized and the spring elements are arranged separately outside the electromagnets.
  • a spring element acts directly on the armature and the counteracting other spring element acts on the armature in the manner of a return spring via the actuator. This design enables effective use of the pole faces, which results in a more compact form of the overall facility leads.
  • the gas exchange valve forming the actuator as before can be provided with a valve spring acting in the closing direction, which at the same time acts as one of the spring elements serves the actuator, which acts on the armature of the actuator. It is therefore expedient in an embodiment of the invention if the spring elements are arranged on the end face of at least one of the electromagnets.
  • the push rod is of divided design, one part being fixedly connected to the armature and the other, the part facing away from the actuating element, being connected to the associated spring element and being connected to the armature in a force-fitting manner.
  • the subdivision of the push rod enables the armature ⁇ ⁇ it to carry out a purely axial movement of the firmly connected part of the push rod, while the part of the push rod connected to the spring element / for example when using a helical spring as spring element without influencing the armature during movement occurring spring rotation can perform.
  • the push rod can be firmly connected to the actuator.
  • the spring element facing the actuator is connected to an extension on the actuator which is held in a force-locking manner by the spring in connection with the push rod.
  • the two spring elements acting against each other are arranged on the side of the electromagnet facing the actuator, one spring element acting on the push rod and the other spring element acting on a shoulder on the actuator and that the push rod and the approach are positively connected.
  • This arrangement makes it possible to provide the two spring elements on only one side of the electromagnet arrangement, it still being possible to reduce the overall height if the one spring element extends around the other spring element in a telescopic manner.
  • the magnet coil in the electromagnets is connected to a laminated yoke body, so that the formation of eddy currents is reduced.
  • one of the two electromagnets is mounted displaceably in the direction of movement of the armature and is connected to an actuating device by means of which the distance between the facing pole faces of the two electromagnets can be changed.
  • the actuating device is formed by an additional electromagnet, by means of which the displaceably mounted electromagnet, in cooperation with a spring-acting spring element can be held in two different end positions.
  • FIG. 1 shows an actuating device for actuating a gas exchange valve on an internal combustion engine
  • Fig. 3 an actuator with adjustable
  • the actuating device shown in FIG. 1 for actuating a gas exchange valve has two actuating magnets 1 and 2 arranged at a distance from one another, the yoke bodies of which are provided with magnetic coils 3 and 4.
  • the arrangement is such that the respective pole faces 5 and 6 lie opposite one another.
  • An armature 7 is arranged between the two pole faces 5 and 6 and is connected to a two-part push rod 8, one push rod part 8.1 being firmly connected to the armature, while the other push rod part 8.2 is seated on the armature 7.
  • the push rod 8 is each guided in a bore 9 of the electromagnet 1 and a bore 10 of the electromagnetic 2.
  • the electromagnet 1 is provided at its end facing away from the armature 7 with a cover-shaped housing 11 which serves as an abutment for a spring 12 which is supported at its other end on a plate 13 which is fixedly connected to the push rod 8.2.
  • the end face 14 of the electromagnet 2 facing away from the armature 7 faces an actuator 15 to be actuated, here a gas exchange valve on an internal combustion engine.
  • the valve stem 16 of the gas exchange valve 15 is guided in the cylinder head 17 in the usual way.
  • the free end of the valve stem 16 is in this case firmly connected to a plate-shaped extension 18, which serves as an abutment of a spring element 19 which is supported on the cylinder head 17 with its other end.
  • the spring element 19, like the spring element 12, is designed as a helical compression spring so that both spring elements act against one another, the spring element 19 also serving as a closing spring for the gas exchange valve.
  • the spring element 12 on one side and the Federele ⁇ element 19 on the other side of the armature 7 are now designed so that the equilibrium position of the armature 7 approximately in the middle between the two opposite pole faces 5 and 6 of the electromagnets 1 and 2 lies.
  • one of the two spring elements for example the spring element 12, can be designed with a progressive characteristic curve, so that the equilibrium position shifts from the central position in the direction of the electromagnet 1, thus making starting easier.
  • the armature 7 comes to rest on the pole face 5, the spring element 12 being compressed and the spring element 19 being substantially relieved.
  • the gas exchange valve is closed in this position.
  • the current supply to the electromagnet 1 is now switched off and the current supply to the electromagnet 2 is switched on after a certain point in time.
  • the armature 7 is no longer held on the pole face of the electromagnet 1, so that the spring 12 can move the armature in the direction of the central position between the two pole faces of the magnets 1 and 2.
  • the spring element 19 is loaded.
  • FIG. 2 shows an embodiment in which, starting from a magnet arrangement, as described with reference to FIG. 1, both spring elements 12 and 19 are arranged on the end face of the magnet 2 located below, which faces the actuator 15. In the Dar ⁇ position, the magnet 2 is only indicated.
  • the armature 7, which is only indicated here, is provided via its push rod 8 with a bell-shaped abutment element 13.1.
  • the spring element 12 is supported at one end on the free edge 13.2 of the abutment 13.1 and at the other end on the end face 14 of the magnet 2.
  • the plate-shaped extension 18 connected to the valve stem 16 is located inside the bell-shaped abutment 13.1 and is here, as described with reference to FIG. 1, supported on the surface of the cylinder head 17 via the spring element 19.
  • This nesting of the two spring elements 12 and 19 can, according to the embodiment. Fig. 1, the height can be reduced without giving up the compact design of the electromagnet.
  • the mode of operation corresponds to that described with reference to FIG. 1
  • the two spring elements 12 and 19 have the same spring stiffness despite the different geometric dimensions.
  • the spring element 12, as described above can have a progressive characteristic.
  • FIG. 3 shows an embodiment of an electromagnetic actuating device for actuating a gas exchange valve, which is provided with a spring arrangement, as was described with reference to FIG. 2.
  • the arrangement shown in FIG. 3 in turn has an upper electromagnet 1 and a lower electromagnet 2, which are arranged at a distance from one another and between which an armature 7 is axially movably guided, which can act on the valve stem 16 of the gas exchange valve 15 via its push rod 8.
  • the electromagnet 2 is now mounted in the direction of the double arrow 20 and with an adjusting device
  • the electromagnet 21 connected which in the exemplary embodiment shown here is essentially formed by an additional magnet 22 of an armature plate 23 and a coupling element 24 connected to the electromagnet 2 to be displaced.
  • the electromagnet 1 and the additional magnet 22 are rigidly connected to the cylinder head 17 via a schematically indicated carrier 26.
  • the displaceably mounted electromagnet 2 is pressed under the action of a corresponding return spring against a spacer 27 which specifies the clear distance between the two pole faces 5 and 6 and thus the possible stroke of the armature 7.
  • the anchor plate 23 of the adjusting device is located at the level of the position line 28 shown in broken lines.
  • the spring elements 12 and 19 also form the return spring.
  • the "working direction" of the additional magnet should be such that the position of the displaceable magnet corresponds to the normal operating mode when the additional magnet is de-energized. If the mode of operation with a short stroke of the armature 7 represents "normal operation”, then the armature plate 23 is in the dashed position according to FIG. Fig. 3. If the operation with a long stroke represents "normal operation", the armature plate 23 must be arranged on the other side of the additional magnet 22. There is an energy saving if the additional magnet is only energized during the respective "special operating phase". Instead of a magnetically actuatable actuating device 21, a mechanical, hydraulic or pneumatic adjustment of the stroke length of the armature 7 can also be provided by moving the magnet 2.
  • torsion springs or bending springs for example leaf springs, can also be used.
  • the magnets can have a circular cross section, but also a rectangular or square cross section. The latter is favorable for the sheet metal yoke body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Switches With Compound Operations (AREA)

Abstract

Un régulateur électromagnétique sert à actionner un organe de régulation (15), notamment d'une soupape d'échange de gaz dans un moteur à combustion interne. Le régulateur électromagnétique comprend au moins une bielle (8) qui agit sur l'organe de régulation (15) à actionner et qui est reliée à un induit (7) animé d'un mouvement alternatif entre les surfaces polaires (5, 6) de deux électro-aimants (1, 2) axialement espacés l'un par rapport à l'autre. Lorsque les électro-aimants (1, 2) ne sont pas excités, l'induit (7) est maintenu par au moins deux éléments antagonistes à ressort (12, 19) dans une position intermédiaire entre les surfaces polaires (5, 6). Les éléments à ressort (12, 19) sont montés séparément à l'extérieur des électro-aimants (1, 2).
EP95942673A 1994-12-21 1995-12-15 Commande électromagnétique d'une soupape dans un moteur a combustion interne Expired - Lifetime EP0748416B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00123025A EP1069285B1 (fr) 1994-12-21 1995-12-15 Dispositif électromagnétique pour actionner une soupape de gaz avec des ressorts concentriquement emboítés

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9420463U DE9420463U1 (de) 1994-12-21 1994-12-21 Elektromagnetisch betätigbare Stellvorrichtung
DE9420463U 1994-12-21
PCT/EP1995/004970 WO1996019643A1 (fr) 1994-12-21 1995-12-15 Regulateur a commande electromagnetique

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP00123025A Division EP1069285B1 (fr) 1994-12-21 1995-12-15 Dispositif électromagnétique pour actionner une soupape de gaz avec des ressorts concentriquement emboítés

Publications (2)

Publication Number Publication Date
EP0748416A1 true EP0748416A1 (fr) 1996-12-18
EP0748416B1 EP0748416B1 (fr) 2002-04-17

Family

ID=6917724

Family Applications (2)

Application Number Title Priority Date Filing Date
EP95942673A Expired - Lifetime EP0748416B1 (fr) 1994-12-21 1995-12-15 Commande électromagnétique d'une soupape dans un moteur a combustion interne
EP00123025A Expired - Lifetime EP1069285B1 (fr) 1994-12-21 1995-12-15 Dispositif électromagnétique pour actionner une soupape de gaz avec des ressorts concentriquement emboítés

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP00123025A Expired - Lifetime EP1069285B1 (fr) 1994-12-21 1995-12-15 Dispositif électromagnétique pour actionner une soupape de gaz avec des ressorts concentriquement emboítés

Country Status (4)

Country Link
US (1) US5813653A (fr)
EP (2) EP0748416B1 (fr)
DE (4) DE9420463U1 (fr)
WO (1) WO1996019643A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19518056B4 (de) * 1995-05-17 2005-04-07 Fev Motorentechnik Gmbh Einrichtung zur Steuerung der Ankerbewegung einer elektromagnetischen Schaltanordnung und Verfahren zur Ansteuerung
DE19747009C2 (de) * 1997-10-24 2000-11-16 Daimler Chrysler Ag Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils
DE19822907B4 (de) * 1998-05-22 2006-07-27 Fev Motorentechnik Gmbh Elektromagnetischer Aktuator mit gelenkig abgestützter Rückstellfeder
US6091314A (en) * 1998-06-05 2000-07-18 Siemens Automotive Corporation Piezoelectric booster for an electromagnetic actuator
FR2783033B1 (fr) 1998-09-04 2006-06-02 Renault Agencement pour la commande electromagnetique d'une soupape
FR2790137B1 (fr) * 1999-02-19 2001-07-27 Sagem Module de rappel elastique et procede de fabrication d'un tel module
DE19919734A1 (de) * 1999-04-30 2000-11-02 Mahle Ventiltrieb Gmbh Verfahren und Vorrichtung zum Öffnen und Schließen eines Ventils eines Verbrennungsmotors
FR2817292B1 (fr) 2000-11-24 2003-01-24 Renault Procede de commande d'un moteur a combustion en vue d'optimiser le demarrage
JP2002188417A (ja) * 2000-12-21 2002-07-05 Honda Motor Co Ltd 内燃機関の電磁式動弁装置
FR2838864B1 (fr) 2002-04-18 2004-06-11 Renault Sa Actionneur lineaire electromagnetique de soupape comportant un dispositif de rappel a raideur variable
US20040079306A1 (en) * 2002-10-23 2004-04-29 Norton John D. Variable lift electromechanical valve actuator

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1471861A (en) * 1921-09-07 1923-10-23 Perrault Oscar Louis Valve-actuating mechanism for internal-combustion engines
GB1391955A (en) * 1972-07-12 1975-04-23 British Leyland Austin Morris Actuating internal combustion engine poppet valves
DE2630512A1 (de) * 1976-07-07 1978-01-12 Daimler Benz Ag Ventilsteuerung, insbesondere fuer brennkraftmaschinen
DE3024109A1 (de) 1980-06-27 1982-01-21 Pischinger, Franz, Prof. Dipl.-Ing. Dr.Techn., 5100 Aachen Elektromagnetisch arbeitende stelleinrichtung
DE3025537A1 (de) * 1980-07-05 1982-06-03 Arthur Böhm Kunststoffverarbeitung, 8676 Schwarzenbach, Saale Einrichtung, insbesondere zur halterung von rohren von rohrpostsystemen in schutzrohren
US4649803A (en) * 1984-08-15 1987-03-17 The Garrett Corporation Servo system method and apparatus, servo valve apparatus therefor and method of making same
DE3513107A1 (de) 1985-04-12 1986-10-16 Fleck, Andreas, 2000 Hamburg Elektromagnetisch arbeitende stelleinrichtung
DE3708373C1 (de) * 1987-03-14 1988-07-14 Fleck Andreas Verfahren zum Betreiben eines Einlassventiles einer Brennkraftmaschine
US4831973A (en) 1988-02-08 1989-05-23 Magnavox Government And Industrial Electronics Company Repulsion actuated potential energy driven valve mechanism
DE3920976A1 (de) * 1989-06-27 1991-01-03 Fev Motorentech Gmbh & Co Kg Elektromagnetisch arbeitende stelleinrichtung
DE4004876A1 (de) * 1990-02-16 1991-09-26 Ulrich Karrer Elektrisch betaetigte ventilsteuerung fuer periodisch betriebene ventile fuer kraftmaschinen
US5548263A (en) * 1992-10-05 1996-08-20 Aura Systems, Inc. Electromagnetically actuated valve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9619643A1 *

Also Published As

Publication number Publication date
DE9420463U1 (de) 1996-04-25
EP1069285B1 (fr) 2003-02-19
US5813653A (en) 1998-09-29
EP1069285A3 (fr) 2001-05-02
DE59510563D1 (de) 2003-03-27
EP0748416B1 (fr) 2002-04-17
DE19581518D2 (de) 1997-02-27
WO1996019643A1 (fr) 1996-06-27
DE59510173D1 (de) 2002-05-23
EP1069285A2 (fr) 2001-01-17

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