EP1091368A1 - Electric actuator in particular for a motor vehicle valve - Google Patents
Electric actuator in particular for a motor vehicle valve Download PDFInfo
- Publication number
- EP1091368A1 EP1091368A1 EP00402628A EP00402628A EP1091368A1 EP 1091368 A1 EP1091368 A1 EP 1091368A1 EP 00402628 A EP00402628 A EP 00402628A EP 00402628 A EP00402628 A EP 00402628A EP 1091368 A1 EP1091368 A1 EP 1091368A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electromagnets
- armature
- actuator according
- frame
- elastic members
- 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
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Classifications
-
- 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
-
- 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 electric actuator.
- the invention relates to an electric actuator with two stable active positions and a rest position, comprising a movable armature connected to a member to be actuated, such as a valve motor valve motor vehicle.
- actuators of this type in which the armature is arranged in the air gap separating a first and a second electromagnet placed opposite one another and is associated with two elastic members arranged on either side of this frame, to stress the latter in the rest position, the electromagnets being connected to means feeding them, in order, in cooperation with the elastic members, to move and alternately maintain this armature in active positions stable against the first and second electromagnets.
- the operating principle of such an actuator is based on the use of a harmonic oscillating system controlled by two independent electromagnets.
- Each engine valve is connected to an armature balanced between two compression springs.
- an initialization phase which consists, for example, in ordering alternately the electromagnets at the natural frequency of the armature-organ system to be actuated, the armature is glued against one of the electromagnets of the actuator depending on whether you want to keep the valve open or closed.
- Each electromagnet is controlled individually.
- the electromagnet connection wiring also degrades the reliability of the actuator.
- the object of the invention is therefore to solve these problems.
- the invention relates to an electric actuator with two stable active positions and a rest position, including a frame mobile connected to a member to be actuated, such as a vehicle engine valve automobile, the armature being arranged in the air gap separating a first and a second electromagnets placed opposite one another and being associated with two elastic members arranged on either side of this frame to stress this in the rest position, the electromagnets being connected to supply means of these, to, in cooperation with the elastic organs, move and alternately maintain this armature in stable active positions against the first and second electromagnets, characterized in that the means for supplying electromagnets are formed by a power source common of these controlling their food at the same time.
- This figure shows an electric actuator with two stable active positions and one rest position, this actuator being designated by the general reference 1.
- This actuator in fact comprises a movable armature designated by the general reference 2, which is connected to a member to be actuated such as for example a motor vehicle engine valve, designated by the general reference 3.
- the frame is then placed in the air gap separating a first and a second electromagnet, designated by the references 4 and 5 in this figure, placed opposite each other.
- the frame 2 is also associated with two designated elastic members by the general references 6 and 7 in this figure, and constituted for example by springs arranged on either side of this frame to stress this in the rest position.
- the electromagnets are connected to power supply means of these designated by the general reference 8, for, in cooperation with the elastic members, alternately move and hold the armature 2 in stable active positions against the first and second electromagnets.
- a position sensor designated by the general reference 9 is also associated with this frame, this position sensor being connected to the means supply 8 of the electromagnets to ensure correct control of the supply of these, that is to say cut or establish this supply when one wishes to pass the armature and therefore the valve between their stable positions.
- the means for supplying the electromagnets are formed by a common power source of these driving at the same time their power supply, these electromagnets then being connected in parallel or in series across the common power source 8.
- This structure allows a very significant reduction in the number of electronic power components and a simplification of the wiring used, with a very clear cost and reliability impact.
- the rest position of the armature 2 is offset from the plane of equilibrium of the magnetic forces opposites of attraction of this generated by the electromagnets when these are powered.
- the elastic organs constituted by the springs 6 and 7, can be symmetrical, while the electromagnets respectively 4 and 5, present an asymmetry so as to generate forces opposite magnetic attraction asymmetrical on the frame 2 to allow to this armature to move towards one of the electromagnets at the setting tension of these.
- the electromagnets 4,5 can also be symmetrical, while the elastic members constituted by the springs 6 and 7 may exhibit an asymmetry so as to define a rest position of the armature offset from the plane of symmetry of the electromagnets to allow the armature to move towards one of these.
- the armature is then closer to one of the electromagnets when energizing of the coils thereof, which allows its displacement towards this one.
- magnetic shielding means can be associated with these electromagnets.
- the initialization phase of this system then also consists of supply the electromagnets so as to bring the armature against one of them, either directly if the means of supply are capable of supplying strong currents to glue the reinforcement at once against the corresponding electromagnet, either indirectly by oscillation of the system by ordering it at its natural frequency.
- this actuator has a certain number advantages over those of the state of the art insofar as the unique power supply means of the two electromagnets can be used in association with unique wiring means of these to these means, this which reduces the number of components used and simplifies connection from these electromagnets to these supply means in order to reduce the cost of this function and increase its reliability.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
- Fluid-Driven Valves (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Hybrid Electric Vehicles (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
La présente invention concerne un actionneur électrique.The present invention relates to an electric actuator.
Plus particulièrement, l'invention se rapporte à un actionneur électrique à deux positions actives stables et une position de repos, comprenant une armature mobile reliée à un organe à actionner, tel qu'une soupape de moteur de véhicule automobile.More particularly, the invention relates to an electric actuator with two stable active positions and a rest position, comprising a movable armature connected to a member to be actuated, such as a valve motor valve motor vehicle.
On connaít déjà dans l'état de la technique, des actionneurs de ce type dans lesquels l'armature est disposée dans l'entrefer séparant un premier et un second électroaimants placés en regard l'un'de l'autre et est associée à deux organes élastiques disposés de part et d'autre de cette armature, pour solliciter celle-ci en position de repos, les électroaimants étant reliés à des moyens d'alimentation de ceux-ci, pour, en coopération avec les organes élastiques, déplacer et maintenir alternativement cette armature dans des positions actives stables contre le premier et le second électroaimants.Already known in the prior art, actuators of this type in which the armature is arranged in the air gap separating a first and a second electromagnet placed opposite one another and is associated with two elastic members arranged on either side of this frame, to stress the latter in the rest position, the electromagnets being connected to means feeding them, in order, in cooperation with the elastic members, to move and alternately maintain this armature in active positions stable against the first and second electromagnets.
On pourra par exemple se reporter aux documents EP-A-0 376 716 et EP-A-0 662 697.We can for example refer to documents EP-A-0 376 716 and EP-A-0 662 697.
On sait en effet que le pilotage électrique des soupapes des moteurs de véhicules automobiles permet de mieux gérer le remplissage de ceux-ci, ce qui se traduit notamment par des économies de carburant.We know that the electrical control of engine valves of motor vehicles makes it possible to better manage the filling thereof, this which results in particular in fuel savings.
Le principe de fonctionnement d'un tel actionneur est basé sur l'utilisation d'un système oscillant harmonique piloté par deux électroaimants indépendants.The operating principle of such an actuator is based on the use of a harmonic oscillating system controlled by two independent electromagnets.
Chaque soupape du moteur est reliée à une armature en équilibre entre deux ressorts de compression.Each engine valve is connected to an armature balanced between two compression springs.
Après une phase d'initialisation qui consiste par exemple à commander alternativement les électroaimants à la fréquence propre du système armature-organe à actionner, l'armature est collée contre l'un des électroaimants de l'actionneur selon que l'on souhaite maintenir la soupape ouverte ou fermée.After an initialization phase which consists, for example, in ordering alternately the electromagnets at the natural frequency of the armature-organ system to be actuated, the armature is glued against one of the electromagnets of the actuator depending on whether you want to keep the valve open or closed.
Bien entendu, si les moyens d'alimentation des électroaimants sont capables de fournir des courants importants, il est également possible de coller l'armature contre un électroaimant en une seule fois sans procéder à une mise en oscillation du système à sa fréquence propre. Of course, if the means of supplying the electromagnets are able to supply large currents, it is also possible to bond the armature against an electromagnet in one go without setting in oscillation of the system at its natural frequency.
L'énergie nécessaire au déplacement de l'armature et de la soupape est alors stockée dans le ressort en compression qui se détend dès que l'on coupe l'alimentation de l'électroaimant actif.The energy required to move the armature and the valve is then stored in the compression spring which relaxes as soon as cuts the power supply to the active electromagnet.
Chaque électroaimant est commandé individuellement.Each electromagnet is controlled individually.
Même si certains regroupements peuvent être trouvés, le nombre de composants électroniques nécessaires aux moyens d'alimentation de ces électroaimants reste très important et non compatible avec les exigences de fiabilité d'une fonction de distribution moteur.Although some groupings can be found, the number of electronic components necessary for the means of supplying these electromagnets remains very important and not compatible with reliability requirements an engine distribution function.
Le câblage de raccordement des électroaimants dégrade également la fiabilité de l'actionneur.The electromagnet connection wiring also degrades the reliability of the actuator.
Le but de l'invention est donc de résoudre ces problèmes.The object of the invention is therefore to solve these problems.
A cet effet, l'invention a pour objet un actionneur électrique à deux positions actives stables et une position de repos, comprenant une armature mobile reliée à un organe à actionner, tel qu'une soupape de moteur de véhicule automobile, l'armature étant disposée dans l'entrefer séparant un premier et un second électroaimants placés en regard l'un de l'autre et étant associée à deux organes élastiques disposés de part et d'autre de cette armature pour solliciter celte-ci en position de repos, les électroaimants étant reliés à des moyens d'alimentation de ceux-ci, pour, en coopération avec les organes élastiques, déplacer et maintenir alternativement cette armature dans des positions actives stables contre le premier et le second électroaimants, caractérisé en ce que les moyens d'alimentation des électroaimants sont formés par une source d'alimentation commune de ceux-ci pilotant en même temps leur alimentation.To this end, the invention relates to an electric actuator with two stable active positions and a rest position, including a frame mobile connected to a member to be actuated, such as a vehicle engine valve automobile, the armature being arranged in the air gap separating a first and a second electromagnets placed opposite one another and being associated with two elastic members arranged on either side of this frame to stress this in the rest position, the electromagnets being connected to supply means of these, to, in cooperation with the elastic organs, move and alternately maintain this armature in stable active positions against the first and second electromagnets, characterized in that the means for supplying electromagnets are formed by a power source common of these controlling their food at the same time.
L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant au dessin annexé qui représente un schéma synoptique illustrant la structure et le fonctionnement d'un actionneur selon l'invention.The invention will be better understood on reading the description which will follow, given only as an example and made with reference to the accompanying drawing which represents a synoptic diagram illustrating the structure and the functioning an actuator according to the invention.
On a en effet représenté sur cette figure, un actionneur électrique à deux positions actives stables et une position de repos, cet actionneur étant désigné par la référence générale 1.This figure shows an electric actuator with two stable active positions and one rest position, this actuator being designated by the general reference 1.
Cet actionneur comporte en fait une armature mobile désignée par la
référence générale 2, qui est reliée à un organe à actionner tel que par exemple
une soupape de moteur de véhicule automobile, désignée par la référence générale
3.This actuator in fact comprises a movable armature designated by the
L'armature est alors disposée dans l'entrefer séparant un premier et un second électroaimants, désignés par les références 4 et 5 sur cette figure, placés en regard l'un de l'autre.The frame is then placed in the air gap separating a first and a second electromagnet, designated by the references 4 and 5 in this figure, placed opposite each other.
L'armature 2 est également associée à deux organes élastiques désignés
par les références générales 6 et 7 sur cette figure, et constitués par exemple
par des ressorts disposés de part et d'autre de cette armature pour solliciter
celle-ci en position de repos.The
Les électroaimants sont reliés à des moyens d'alimentation électrique
de ceux-ci désignés par la référence générale 8, pour, en coopération avec les
organes élastiques, déplacer et maintenir alternativement l'armature 2 dans des
positions actives stables contre le premier et le second électroaimants.The electromagnets are connected to power supply means
of these designated by the
Un capteur de position désigné par la référence générale 9 est également
associé à cette armature, ce capteur de position étant relié aux moyens
d'alimentation 8 des électroaimants pour assurer un pilotage correct de
l'alimentation de ceux-ci, c'est-à-dire couper ou établir cette alimentation lorsque
l'on souhaite faire passer l'armature et donc la soupape entre leurs positions stables.A position sensor designated by the
Selon l'invention, les moyens d'alimentation des électroaimants sont
formés par une source d'alimentation commune de ceux-ci pilotant en même
temps leur alimentation, ces électroaimants étant alors raccordés en parallèle ou
en série aux bornes de la source d'alimentation commune 8.According to the invention, the means for supplying the electromagnets are
formed by a common power source of these driving at the same
time their power supply, these electromagnets then being connected in parallel or
in series across the
On a en effet représenté sur cette figure, un raccordement en série de
bobines 10 et 11 respectivement des électroaimants 4 et 5.In this figure, a series connection of
On conçoit alors que ces électroaimants sont alimentés en même temps et qu'il est possible d'utiliser des moyens communs d'alimentation et de raccordement de ceux-ci.We can then see that these electromagnets are powered at the same time and that it is possible to use common means of feeding and connection of these.
Cette structure permet une diminution très importante du nombre de composants électroniques de puissance et une simplification du câblage utilisé, avec un impact coût et fiabilité très net.This structure allows a very significant reduction in the number of electronic power components and a simplification of the wiring used, with a very clear cost and reliability impact.
De plus, dans l'actionneur selon l'invention, la position de repos de
l'armature 2 est décalée par rapport au plan d'équilibre des forces magnétiques
opposées d'attraction de celle-ci engendrées par les électroaimants lorsque
ceux-ci sont alimentés.In addition, in the actuator according to the invention, the rest position of
the
C'est ainsi par exemple que les organes élastiques constitués par les
ressorts 6 et 7, peuvent être symétriques, tandis que les électroaimants respectivement
4 et 5, présentent une dissymétrie de manière à engendrer des forces
magnétiques opposées d'attraction dissymétriques sur l'armature 2 pour permettre
à cette armature de se déplacer vers l'un des électroaimants à la mise sous
tension de ceux-ci.Thus, for example, the elastic organs constituted by the
Un exemple de réalisation de cette dissymétrie des électroaimants
consiste à utiliser dans ceux-ci, des bobines 10 et 11 présentant des nombres de
spires différents.An example of this dissymmetry of electromagnets
consists in using in them,
On conçoit alors que lors de la mise sous tension des bobines, l'armature est attirée vers l'un des électroaimants, les forces d'attraction exercées par cet électroaimant sur l'armature étant plus importantes que celles engendrées par l'autre électroaimant en raison des nombres de spires différents des bobines de ceux-ci.It can therefore be seen that when the coils are energized, the armature is attracted towards one of the electromagnets, the forces of attraction exerted by this electromagnet on the armature being more important than those generated by the other electromagnet due to the different numbers of turns coils of these.
Bien entendu, d'autres modes de réalisation de cette dissymétrie peuvent être envisagés.Of course, other embodiments of this asymmetry can be considered.
Ainsi par exemple, les électroaimants 4,5 peuvent également être symétriques,
tandis que les organes élastiques constitués par les ressorts 6 et 7
peuvent présenter une dissymétrie de manière à définir une position de repos de
l'armature décalée par rapport au plan de symétrie des électroaimants pour permettre
à l'armature de se déplacer vers l'un de ceux-ci.So for example, the electromagnets 4,5 can also be symmetrical,
while the elastic members constituted by the
L'armature est alors plus proche de l'un des électroaimants lors de la mise sous tension des bobines de ceux-ci, ce qui permet son déplacement vers celui-ci.The armature is then closer to one of the electromagnets when energizing of the coils thereof, which allows its displacement towards this one.
Bien entendu également, des moyens de blindage magnétique peuvent être associés à ces électroaimants.Of course also, magnetic shielding means can be associated with these electromagnets.
La phase d'initialisation de ce système consiste alors également à alimenter les électroaimants de manière à amener l'armature contre l'un de ceux-ci, soit directement si les moyens d'alimentation sont capables de fournir des courants importants pour coller l'armature en une seule fois contre l'électroaimant correspondant, soit indirectement par mise en oscillation du système en le commandant à sa fréquence propre.The initialization phase of this system then also consists of supply the electromagnets so as to bring the armature against one of them, either directly if the means of supply are capable of supplying strong currents to glue the reinforcement at once against the corresponding electromagnet, either indirectly by oscillation of the system by ordering it at its natural frequency.
On conçoit alors que cet actionneur présente un certain nombre d'avantages par rapport à ceux de l'état de la technique dans la mesure où les moyens d'alimentation uniques des deux électroaimants peuvent être utilisés en association avec des moyens de câblage uniques de ceux-ci à ces moyens, ce qui permet de réduire le nombre de composants utilisés et de simplifier le raccordement de ces électroaimants à ces moyens d'alimentation afin de réduire le coût de cette fonction et d'en augmenter la fiabilité.It can therefore be seen that this actuator has a certain number advantages over those of the state of the art insofar as the unique power supply means of the two electromagnets can be used in association with unique wiring means of these to these means, this which reduces the number of components used and simplifies connection from these electromagnets to these supply means in order to reduce the cost of this function and increase its reliability.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9912365 | 1999-10-04 | ||
| FR9912365A FR2799302B1 (en) | 1999-10-04 | 1999-10-04 | ELECTRIC ACTUATOR IN PARTICULAR FOR A MOTOR VEHICLE ENGINE VALVE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1091368A1 true EP1091368A1 (en) | 2001-04-11 |
| EP1091368B1 EP1091368B1 (en) | 2008-05-14 |
Family
ID=9550556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00402628A Expired - Lifetime EP1091368B1 (en) | 1999-10-04 | 2000-09-21 | Electric actuator in particular for a motor vehicle valve |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1091368B1 (en) |
| AT (1) | ATE395707T1 (en) |
| DE (1) | DE60038857D1 (en) |
| ES (1) | ES2304935T3 (en) |
| FR (1) | FR2799302B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1752692A1 (en) * | 2005-08-08 | 2007-02-14 | Toyota Jidosha Kabushiki Kaisha | Electromagnetically driven valve |
| US7353787B2 (en) | 2005-08-08 | 2008-04-08 | Toyota Jidosha Kabushiki Kaisha | Electromagnetically driven valve |
| US7387094B2 (en) | 2005-08-08 | 2008-06-17 | Toyota Jidosha Kabushiki Kaisha | Electromagnetically driven valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1613101A1 (en) * | 1967-04-14 | 1970-05-21 | Kernforschung Gmbh Ges Fuer | Electromagnetic drive |
| EP0024995A1 (en) * | 1979-09-04 | 1981-03-11 | The Bendix Corporation | Improved electromagnetic solenoid actuator |
| US4504198A (en) * | 1980-09-08 | 1985-03-12 | Taisan Industrial Co., Ltd. | Electromagnetic pump |
| US4533890A (en) * | 1984-12-24 | 1985-08-06 | General Motors Corporation | Permanent magnet bistable solenoid actuator |
| EP0376716A1 (en) * | 1988-12-28 | 1990-07-04 | Isuzu Motors Limited | Control apparatus for valve driven by electromagnetic force |
| EP0384663A1 (en) * | 1989-02-20 | 1990-08-29 | Isuzu Ceramics Research Institute Co., Ltd. | Electromagnetic force valve driving apparatus |
| EP0662697A1 (en) * | 1994-01-07 | 1995-07-12 | Automobiles Peugeot | Method for controlling a bistable electromagnetic actuator and device to carry out such method |
-
1999
- 1999-10-04 FR FR9912365A patent/FR2799302B1/en not_active Expired - Fee Related
-
2000
- 2000-09-21 AT AT00402628T patent/ATE395707T1/en not_active IP Right Cessation
- 2000-09-21 ES ES00402628T patent/ES2304935T3/en not_active Expired - Lifetime
- 2000-09-21 EP EP00402628A patent/EP1091368B1/en not_active Expired - Lifetime
- 2000-09-21 DE DE60038857T patent/DE60038857D1/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1613101A1 (en) * | 1967-04-14 | 1970-05-21 | Kernforschung Gmbh Ges Fuer | Electromagnetic drive |
| EP0024995A1 (en) * | 1979-09-04 | 1981-03-11 | The Bendix Corporation | Improved electromagnetic solenoid actuator |
| US4504198A (en) * | 1980-09-08 | 1985-03-12 | Taisan Industrial Co., Ltd. | Electromagnetic pump |
| US4533890A (en) * | 1984-12-24 | 1985-08-06 | General Motors Corporation | Permanent magnet bistable solenoid actuator |
| EP0376716A1 (en) * | 1988-12-28 | 1990-07-04 | Isuzu Motors Limited | Control apparatus for valve driven by electromagnetic force |
| EP0384663A1 (en) * | 1989-02-20 | 1990-08-29 | Isuzu Ceramics Research Institute Co., Ltd. | Electromagnetic force valve driving apparatus |
| EP0662697A1 (en) * | 1994-01-07 | 1995-07-12 | Automobiles Peugeot | Method for controlling a bistable electromagnetic actuator and device to carry out such method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1752692A1 (en) * | 2005-08-08 | 2007-02-14 | Toyota Jidosha Kabushiki Kaisha | Electromagnetically driven valve |
| US7353787B2 (en) | 2005-08-08 | 2008-04-08 | Toyota Jidosha Kabushiki Kaisha | Electromagnetically driven valve |
| US7387094B2 (en) | 2005-08-08 | 2008-06-17 | Toyota Jidosha Kabushiki Kaisha | Electromagnetically driven valve |
| CN100427727C (en) * | 2005-08-08 | 2008-10-22 | 丰田自动车株式会社 | Electromagnetically driven valve |
Also Published As
| Publication number | Publication date |
|---|---|
| DE60038857D1 (en) | 2008-06-26 |
| ES2304935T3 (en) | 2008-11-01 |
| EP1091368B1 (en) | 2008-05-14 |
| FR2799302A1 (en) | 2001-04-06 |
| FR2799302B1 (en) | 2002-01-18 |
| ATE395707T1 (en) | 2008-05-15 |
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