EP2212527A2 - Actionneur électromagnétique à butée élastique de fin de course - Google Patents
Actionneur électromagnétique à butée élastique de fin de courseInfo
- Publication number
- EP2212527A2 EP2212527A2 EP08872126A EP08872126A EP2212527A2 EP 2212527 A2 EP2212527 A2 EP 2212527A2 EP 08872126 A EP08872126 A EP 08872126A EP 08872126 A EP08872126 A EP 08872126A EP 2212527 A2 EP2212527 A2 EP 2212527A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- movable member
- extreme
- actuator
- valve
- nominal
- 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
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
- Electromagnetic actuator with end-stop elastic stop is Electromagnetic actuator with end-stop elastic stop
- the present invention relates to an electromagnetic actuator, for example, that can be used for actuating valves of thermal motors of motor vehicles.
- electromagnetic actuators comprising a frame on which are mounted, firstly, 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 to overcome this disadvantage.
- an electromagnetic actuator comprising a movable member and coils for moving the movable member in an alternating movement between a first position and a second position of a race. nominal.
- 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.
- FIG. 1 is a schematic sectional view of a linear actuator according to the invention
- FIG. 2 is a diagram showing the evolution of the restoring force as a function of the position of the movable member
- FIG. 3 is a diagram showing the evolution of the restoring force as a function of the position of the movable member in a variant of the invention.
- the actuating device comprises an electromagnetic actuator generally designated at 1.
- the electromagnetic actuator 1 comprises a frame comprising a frame 2 having two opposite sides from which extend, projecting towards 1 inside 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.
- the core 6 is connected to a valve stem 9 by a rod 10 in such a way that a displacement of the core 6 is maintained. in its sliding direction 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 an abutment 12 to abut the buffer 11.
- the buffer 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 X1 of the valve and a nominal opening position X 2 of the valve (shown in FIG. 1). .
- control unit 13 drives the coils 4 to move the core 6 between the position closing valve Xi and an extreme opening position X 3 of the valve.
- the extreme open position of the valve is 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 in 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)
Abstract
Description
Claims
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 true EP2212527A2 (fr) | 2010-08-04 |
EP2212527B1 EP2212527B1 (fr) | 2012-06-06 |
Family
ID=39596311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08872126A Not-in-force EP2212527B1 (fr) | 2007-11-22 | 2008-11-20 | Actionneur électromagnétique à butée élastique de fin de course |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2212527B1 (fr) |
FR (1) | FR2924264B1 (fr) |
WO (1) | WO2009098383A2 (fr) |
Families Citing this family (2)
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)
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 |
-
2007
- 2007-11-22 FR FR0708198A patent/FR2924264B1/fr not_active Expired - Fee Related
-
2008
- 2008-11-20 WO PCT/FR2008/001621 patent/WO2009098383A2/fr active Application Filing
- 2008-11-20 EP EP08872126A patent/EP2212527B1/fr not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2009098383A2 * |
Also Published As
Publication number | Publication date |
---|---|
FR2924264A1 (fr) | 2009-05-29 |
WO2009098383A2 (fr) | 2009-08-13 |
EP2212527B1 (fr) | 2012-06-06 |
FR2924264B1 (fr) | 2012-12-14 |
WO2009098383A3 (fr) | 2009-10-15 |
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