EP2212527B1 - Elektromagnetischer aktuator mit elastischem endanschlag - Google Patents

Elektromagnetischer aktuator mit elastischem endanschlag Download PDF

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Publication number
EP2212527B1
EP2212527B1 EP08872126A EP08872126A EP2212527B1 EP 2212527 B1 EP2212527 B1 EP 2212527B1 EP 08872126 A EP08872126 A EP 08872126A EP 08872126 A EP08872126 A EP 08872126A EP 2212527 B1 EP2212527 B1 EP 2212527B1
Authority
EP
European Patent Office
Prior art keywords
mobile member
movable member
extreme
actuator
valve
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.)
Not-in-force
Application number
EP08872126A
Other languages
English (en)
French (fr)
Other versions
EP2212527A2 (de
Inventor
Emmanuel Talon
Nicolas Gelez
Julien Hobraiche
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.)
Valeo Systemes de Controle Moteur SAS
Original Assignee
Valeo Systemes de Controle Moteur SAS
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 Valeo Systemes de Controle Moteur SAS filed Critical Valeo Systemes de Controle Moteur SAS
Publication of EP2212527A2 publication Critical patent/EP2212527A2/de
Application granted granted Critical
Publication of EP2212527B1 publication Critical patent/EP2212527B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the present invention relates to an electromagnetic actuator for example usable for the actuation of motor vehicle thermal engine valves.
  • electromagnetic actuators comprising a frame on which are mounted, on the one hand, a fixed member consisting of a frame provided with a plurality of coils and, secondly, a movable member or core provided with magnets permanent arranged next to the coils.
  • the coils are generally associated with a control unit arranged to feed the coils according to the desired displacement of the movable member.
  • the control unit is generally programmed to provide reciprocating movement of the movable member, reciprocating linear or circular movement according to the structure of the actuator, according to a stroke proper to the intended application.
  • the stroke corresponds to the necessary displacement of the movable member to move the valve between a closed position and an open position.
  • These actuators are generally devoid of elastic return element of the movable member, the structure of the actuator allowing the coils to move the movable member over its entire stroke and rendering unnecessary an elastic return of the movable member to the one or the other of these positions.
  • An object of the invention is to provide a means of remedying this disadvantage.
  • an electromagnetic actuator comprising a movable member and moving coils of the movable member in reciprocating motion between a first position and a second position of a nominal stroke.
  • the movable member is movable beyond the second position to an extreme position and the electromagnetic actuator comprises an elastic return element of the movable member to the first position, the return element being arranged to act on the mobile member essentially when it is in the vicinity of the extreme position.
  • the elastic return element accelerates the return of the movable member to the first position.
  • the elastic return element essentially acts on the movable member when it is moved beyond its second position.
  • the movable member comprises a stop for coming to bear against the return element and the return element is an elastically deformable element in a direction parallel to the reciprocating movement and is arranged to be in contact with the stop of the movable member as the movable member is between, on the one hand, the extreme position and, on the other hand, an intermediate position located between the second position and the extreme position.
  • This embodiment is furthermore particularly simple.
  • the actuator forming an electromagnetic valve actuator in which the first position is a closed position of the valve, the second position is a nominal valve opening position, and the extreme position is an extreme position opening beyond the nominal opening position.
  • the actuating device comprises an electromagnetic actuator generally designated 1.
  • the electromagnetic actuator 1 comprises an armature comprising a frame 2 having two opposite sides from which extend, protruding towards the inside of the frame 2, branches 3, namely a central branch and two external branches arranged on either side of the central branch.
  • Coils 4 extend around the outer branches 3.
  • the branches 3 of the two opposite sides have free ends facing each other in pairs and widened, defining between them a passage for a movable member namely a core generally designated 6.
  • the core 6 is formed of a plate incorporating magnets 7 which extend parallel to the free ends of the legs 3 and which are spaced by non-magnetic portions 8.
  • the core 6 is connected to a valve stem 9 by a rod 10 so that a displacement of the core 6 in its direction of sliding causes a corresponding displacement of the valve.
  • the rod 10 passes through a buffer 11 of elastomeric material attached to a fixed frame integral with the actuator.
  • the rod 10 comprises a stop 12 to abut the pad 11.
  • the pad 11 is elastically deformable in a direction parallel to the reciprocating movement of the movable member.
  • the coils 4 are connected to an electric power supply source controlled by a control unit 13 arranged to control the supply of the coils 4 in current and adjust the intensity delivered.
  • the control unit 13 may be the Valve Control Unit (VCU) or the Engine Control Unit (ECU).
  • control unit 13 drives the coils 4 to move the core 6 between a closed position X 1 of the valve and a nominal opening position X 2 of the valve (shown in FIG. figure 1 ).
  • control unit 13 drives the coils 4 to move the core 6 between the position closure valve X 1 of the valve and an extreme open position X 3 of the valve.
  • the extreme open position of the valve is located beyond the nominal opening position.
  • the buffer 11 forms a resilient return member of the movable member to the closed position and is arranged to act on the movable member substantially when it is in the vicinity of the extreme open position X 3 (see diagram 2 illustrating the force exerted on the movable member by the buffer 11 as a function of the position of the movable member).
  • the pad 11 is arranged to be in contact with the stop 12 of the movable member as long as the movable member is between, on the one hand, the extreme open position X 3 and, on the other hand, a intermediate position X 4 between the nominal opening position X 2 and the extreme open position X 3 .
  • the invention is applicable to actuators having a structure different from that described and for example to rotary rotary actuators.
  • a return element in permanent contact with the abutment 11, for example a spring having a negligible stiffness on the nominal stroke of the movable member, between the closed position and the nominal position of opening of the valve in the example described, and a stiffness increasing rapidly beyond the nominal stroke, that is to say between the nominal opening position and the extreme open position for the example described ( see it figure 3 illustrating the force exerted on the movable member by the spring as a function of the position of the movable member).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Claims (5)

  1. Elektromagnetischer Stellantrieb, der ein bewegliches Organ (6) und Spulen (4) zur Verschiebung des beweglichen Organs gemäß einer abwechselnden Bewegung zwischen einer ersten Stellung und einer zweiten Stellung eines Nennhubs aufweist, dadurch gekennzeichnet, dass das bewegliche Organ über die zweite Stellung hinaus in eine Endstellung verschoben werden kann, und dass der elektromagnetische Stellantrieb ein elastisches Rückstellelement (11) des beweglichen Organs in die erste Stellung enthält, wobei das Rückstellelement ausgebildet ist, um hauptsächlich dann auf das bewegliche Organ einzuwirken, wenn dieses sich in der Nähe der Endstellung befindet.
  2. Stellantrieb nach Anspruch 1, bei dem das bewegliche Organ (6) einen Anschlag (12) enthält, um auf dem Rückstellelement (11) in Auflage zu kommen, und das Rückstellelement ein in einer Richtung parallel zur abwechselnden Bewegung elastisch verformbares Element und angeordnet ist, um mit dem Anschlag des beweglichen Organs in Kontakt zu sein, solange das bewegliche Organ sich zwischen einerseits der Endstellung und andererseits einer Zwischenstellung befindet, die zwischen der zweiten Stellung und der Endstellung liegt.
  3. Stellantrieb nach Anspruch 2, bei dem das Rückstellelement ein Puffer (11) aus Elastomermaterial ist.
  4. Stellantrieb nach einem der vorhergehenden Ansprüche, bei dem das bewegliche Organ (6) mit Dauermagneten (7) versehen ist, die gegenüber den Spulen (4) angeordnet sind, wobei die Spulen und die Dauermagnete parallel zur Bewegung des beweglichen Organs angeordnet sind.
  5. Stellantrieb nach einem der vorhergehenden Ansprüche, der einen elektromagnetischen Stellantrieb eines Ventils (9) bildet, bei dem die erste Stellung eine Schließstellung des Ventils ist, die zweite Stellung eine Nennöffnungsstellung des Ventils ist, und die Endstellung eine Endöffnungsstellung ist, die sich jenseits der Nennöffnungsstellung befindet.
EP08872126A 2007-11-22 2008-11-20 Elektromagnetischer aktuator mit elastischem endanschlag Not-in-force EP2212527B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0708198A FR2924264B1 (fr) 2007-11-22 2007-11-22 Actionneur electromagnetique a butee elastique de fin de course.
PCT/FR2008/001621 WO2009098383A2 (fr) 2007-11-22 2008-11-20 Actionneur électromagnétique à butée élastique de fin de course

Publications (2)

Publication Number Publication Date
EP2212527A2 EP2212527A2 (de) 2010-08-04
EP2212527B1 true EP2212527B1 (de) 2012-06-06

Family

ID=39596311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08872126A Not-in-force EP2212527B1 (de) 2007-11-22 2008-11-20 Elektromagnetischer aktuator mit elastischem endanschlag

Country Status (3)

Country Link
EP (1) EP2212527B1 (de)
FR (1) FR2924264B1 (de)
WO (1) WO2009098383A2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2995129B1 (fr) * 2012-08-30 2017-10-20 Xap Dispositif d'entrainement lineaire electromagnetique comprenant un organe mobile pourvu d'une pluralite de masses aimantees.
CN106451990A (zh) * 2016-11-02 2017-02-22 深圳市兆业电子科技有限公司 一种永磁直线电机及直线振动器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2797297B1 (fr) * 1999-08-06 2002-08-23 Renault Dispositif d'actionnement de soupape electrodynamique
FR2818430B1 (fr) * 2000-12-15 2003-04-18 Renault Dispositif d'entrainement lineaire d'une soupape au moyen d'aimants mobiles
FR2849466B1 (fr) * 2002-12-27 2005-02-18 Renault Sa Ationneur lineaire de soupape comportant un aimant mobile dans un entrefer magnetique

Also Published As

Publication number Publication date
FR2924264A1 (fr) 2009-05-29
EP2212527A2 (de) 2010-08-04
WO2009098383A2 (fr) 2009-08-13
FR2924264B1 (fr) 2012-12-14
WO2009098383A3 (fr) 2009-10-15

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