EP1561915A2 - Electromagnetic valve actuator in an internal combustion engine - Google Patents

Electromagnetic valve actuator in an internal combustion engine Download PDF

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Publication number
EP1561915A2
EP1561915A2 EP05300063A EP05300063A EP1561915A2 EP 1561915 A2 EP1561915 A2 EP 1561915A2 EP 05300063 A EP05300063 A EP 05300063A EP 05300063 A EP05300063 A EP 05300063A EP 1561915 A2 EP1561915 A2 EP 1561915A2
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EP
European Patent Office
Prior art keywords
valve
electromagnet
coil
closed position
current
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
EP05300063A
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German (de)
French (fr)
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EP1561915B1 (en
EP1561915A3 (en
Inventor
Cédric Morin
Emmanuel Sedda
Christophe Baldi
Christophe Fageon
Raphael Penet
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PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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Application filed by Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP1561915A2 publication Critical patent/EP1561915A2/en
Publication of EP1561915A3 publication Critical patent/EP1561915A3/en
Application granted granted Critical
Publication of EP1561915B1 publication Critical patent/EP1561915B1/en
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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 invention relates to a control device of the type electromechanical system for opening and closing intake valves and / or exhaust for a combustion engine, in particular a combustion engine internal.
  • valves In an internal combustion engine, the valves are open or closed at specific times in the operating cycle. In the most common motors, control of opening and closing is done mechanically depending on the position of the crankshaft. In recent years, electromechanical controls of valves have been developed which have the advantage of simplifying the implementation of the motor and to allow durations and moments of opening and closing valves that can be chosen at will to optimize engine performance.
  • Such electromechanical devices for controlling valves generally comprise a pallet, or magnetic plate cooperating with two electromagnets and two springs.
  • the pallet is generally secured to the end of a rod of which the other end cooperates with the tail of the valve.
  • the stem can also to be secured to the valve stem.
  • One of the electromagnets is planned to draw the pallet into a position such that the valve is in position closed. In this position, one spring is compressed and the other relaxed, the compressed spring being then used to push the pallet towards the other position, that for which the valve is in the open position.
  • the control from the closed position to the open position is performed by stopping the supply of the first electromagnet and by the subsequent feeding of the second electromagnet. In the open position, the first spring is relaxed and the second spring is compressed. This second spring pushes the pallet when ordering the position opening towards the closed position.
  • one and / or the other of the electromagnets is of the polarized type, that is to say that provides a permanent magnet in the magnetic circuit of one and / or the other electromagnets. In this case, maintaining the valve in an open and / or closed position requires no current.
  • the aim of the invention is to reduce the consumption of electrical energy and to improve the operational safety of such a control device of valve. It is also intended to increase the possibilities of order a valve actuator.
  • a valve actuator according to the invention is characterized in that the closing control electromagnet and the control electromagnet are of the polarized type and that the control of switching from one position to another is only defluxing current, that is to say a current which opposes the effect of blocking the pallet in the closed position or in the open position, following the movement of the pallet being then controlled solely by the springs.
  • the coil of the opening control electromagnet is faulty and if the pallet is in the closed position, the current is kept at zero in the coil of the closing control electromagnet so that the valve remains closed. If the coil of the control electromagnet opening is faulty and if the pallet is in the middle of its course, the coil of the closure control electromagnet is applied to current to position the valve in the closed position; then, the current in this last coil is reduced to zero.
  • the motor can be stopped with closed valve.
  • an engine stopped with closed valves provides braking or blocking when the vehicle is stopped.
  • the coils of the two electromagnets can be in series or in parallel or independent of each other.
  • the coils When the coils are in parallel, if one of the coils is in open circuit (because of a breakdown), it does not does not disturb the operation of the other coil.
  • the reels When the reels are in series, the short circuit of a coil does not prevent the operation of the other coil. It is preferred to mount the coils in parallel with the assembly coils in series because the disconnection of a coil is more likely than a short circuit.
  • the invention relates, in general, to a device for actuating valve for an internal combustion engine comprising a member of the type ferromagnetic connected to the valve and movable in a race for which at one end of this stroke the valve is in the closed position and at another end of the stroke, this valve is in position open, the control of the displacement being carried out using a first and second electromagnets and spring means (s) in such a way that the member is close to a first electromagnet for the closed position of the valve and near the second electromagnet for the position open of the valve, which is characterized in that, both electromagnets being of the polarized type with each a permanent magnet to hold the organ at the corresponding end of its stroke in the absence of current in the corresponding coil of this electromagnet, it comprises control means for passing the valve from its open position to its closed position or its closing position to its open position, comprising means to apply to the coil of the second electromagnet or to the coil of the first electromagnet, only a defluxing impulse opposing the
  • the device comprises a means for detecting the operation of the coils of electromagnets and a means of safety in case of failure of one of the coils, apply to the coil of the non-faulty electromagnet, a current allowing to position the valve in the closed position.
  • the security means may include means for, in case of coil failure of the second electromagnet, apply to the coil of the first electromagnet a current allowing the member to move towards this first electromagnet.
  • the invention also relates to an engine comprising a device actuating the type defined above.
  • FIG. 1 is a diagram of valve actuation device according to the invention.
  • Figures 2a and 2b are diagrams illustrating the operation of a valve actuator according to Figure 1.
  • FIG. 1 shows an embodiment of an actuator according to the invention in which there is provided, on the one hand, a control electromagnet of closure of the polarized type, with a magnet to block the valve in closed position in the absence of current in the coil electromagnet and, on the other hand, an electromagnet opening control, also of polarized type, whose magnet allows also, in the absence of current in the corresponding coil, keep the valve in the open position.
  • FIG. 1 there is shown a pallet or magnetic plate 10 integral with a rod 12 cooperating with a tail 14 of a valve 16.
  • the closure control electromagnet 18 comprises a circuit magnet 20, a permanent magnet 22 and a control coil 24.
  • the opening control electromagnet 26 has a circuit magnetic 28, a permanent magnet 30 and a control coil 32.
  • a spring 36 surrounds the valve stem 14. It is arranged in such a way it is compressed when the valve 16 is in the open position (towards the bottom in Figure 1) and relaxed in the case where the valve 16 is in position closing (upwards in the representation of Figure 1).
  • a spring 38 surrounds the rod 12 and is arranged in such a way that compressed when the valve is in the closed and relaxed position when the valve is in the open position.
  • the plate 10 When the actuator shown in FIG. 1 operates normally (without failure), the plate 10 is attracted to the magnetic circuit 20 thanks to the supply of the coil 24 and to the effect of the permanent magnet 22.
  • the current in the coil 24 is zero when the valve is in position closed because the magnet 22 is sufficient to hold the plate 10 against the circuit 20. In this position, the spring 36 is relaxed and the spring 38 is compressed.
  • the transition from the open position to the closed position is effected similarly by applying a defluxing current in the coil 32.
  • the valve can be maintained in closed position.
  • FIG. 2a shows the switching from the closed position to the open position of the valve.
  • Curve 50 represents the position of the valve. On part 52 of this curve 50, the valve is in the closed position and on the part 54, the valve is in the open position.
  • Curve 56 represents the variation of the speed valve or tray. On the bottom diagram, it is shown by the curve 58, the intensity of the current in the coil 24. This intensity is zero except for a pulse 60 during which the defluxing current. Moreover, the current in the coil 32 is kept at zero.
  • Figure 2b shows the switching from the open position to the position closed of the valve.
  • a current is applied to the coil 32 of defluxing which opposes the maintenance of the plate 10 against the circuit 28 and no current is applied to the coil 24.
  • the curve 62 represents the variation of the position of the valve from the open position 64 to the position closed 66.
  • Curve 68 represents the variation of the speed of the valve and on the bottom diagram of Figure 2b, the curve is represented 70, the variation of the current in the coil 32. The intensity of the current in this coil remains equal to zero except during the application of a pulse 72 of defluxing.
  • a current applied to the coil 32 allows to control the valve to the closed position.
  • the valve can be maintained in closed position.

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

Abstract

The actuator has two polarized electromagnets (18, 26), each with a permanent magnet to maintain a magnetic chuck of a valve when the valve is in closed position in the absence of current in a coil of the electromagnet. A defluxing current opposing the effect of the permanent magnet is applied to the coil of either of the electromagnets to move the valve from open to closed position or inversely. A spring permits switching of the valve. An independent claim is also included for an engine comprising a valve actuator.

Description

L'invention est relative à un dispositif de commande de type électromécanique pour l'ouverture et la fermeture de soupapes d'admission et/ou d'échappement pour un moteur thermique, notamment à combustion interne.The invention relates to a control device of the type electromechanical system for opening and closing intake valves and / or exhaust for a combustion engine, in particular a combustion engine internal.

Dans un moteur à combustion interne, les soupapes sont ouvertes ou fermées à des moments précis du cycle de fonctionnement. Dans les moteurs les plus courants, la commande de l'ouverture et de la fermeture s'effectue de façon mécanique en fonction de la position du vilebrequin. Ces dernières années, des commandes électromécaniques de soupapes ont été développées qui présentent l'avantage de simplifier la réalisation du moteur et de permettre des durées et des moments d'ouverture et de fermeture des soupapes qui peuvent être choisis à volonté afin d'optimiser les performances du moteur.In an internal combustion engine, the valves are open or closed at specific times in the operating cycle. In the most common motors, control of opening and closing is done mechanically depending on the position of the crankshaft. In recent years, electromechanical controls of valves have been developed which have the advantage of simplifying the implementation of the motor and to allow durations and moments of opening and closing valves that can be chosen at will to optimize engine performance.

De tels dispositifs électromécaniques de commande de soupapes comportent en général une palette, ou plateau, magnétique coopérant avec deux électroaimants et deux ressorts.Such electromechanical devices for controlling valves generally comprise a pallet, or magnetic plate cooperating with two electromagnets and two springs.

A cet effet, la palette est en général solidaire de l'extrémité d'une tige dont l'autre extrémité coopère avec la queue de la soupape. La tige peut aussi être solidaire de la queue de soupape. L'un des électroaimants est prévu pour attirer la palette dans une position telle que la soupape soit en position fermée. Dans cette position, un ressort est comprimé et l'autre détendu, le ressort comprimé étant ensuite utilisé pour repousser la palette vers l'autre position, celle pour laquelle la soupape est en position d'ouverture. La commande de la position de fermeture vers la position d'ouverture est effectuée grâce à l'arrêt de l'alimentation du premier électroaimant et par l'alimentation ultérieure du second électroaimant. En position d'ouverture, le premier ressort est détendu et le second ressort est comprimé. Ce second ressort repousse la palette lors de la commande de la position d'ouverture vers la position de fermeture.For this purpose, the pallet is generally secured to the end of a rod of which the other end cooperates with the tail of the valve. The stem can also to be secured to the valve stem. One of the electromagnets is planned to draw the pallet into a position such that the valve is in position closed. In this position, one spring is compressed and the other relaxed, the compressed spring being then used to push the pallet towards the other position, that for which the valve is in the open position. The control from the closed position to the open position is performed by stopping the supply of the first electromagnet and by the subsequent feeding of the second electromagnet. In the open position, the first spring is relaxed and the second spring is compressed. This second spring pushes the pallet when ordering the position opening towards the closed position.

Pour limiter la consommation de courant de l'actionneur de soupape, l'un et/ou l'autre des électroaimants est de type polarisé, c'est-à-dire qu'on prévoit un aimant permanent dans le circuit magnétique de l'un et/ou de l'autre des électroaimants. Dans ce cas, le maintien de la soupape dans une position d'ouverture et/ou de fermeture ne nécessite aucun courant.To limit the power consumption of the valve actuator, one and / or the other of the electromagnets is of the polarized type, that is to say that provides a permanent magnet in the magnetic circuit of one and / or the other electromagnets. In this case, maintaining the valve in an open and / or closed position requires no current.

L'invention vise à diminuer la consommation en énergie électrique et à améliorer la sécurité de fonctionnement d'un tel dispositif de commande de soupape. Elle a également pour but d'augmenter les possibilités de commander un actionneur de soupape.The aim of the invention is to reduce the consumption of electrical energy and to improve the operational safety of such a control device of valve. It is also intended to increase the possibilities of order a valve actuator.

Un actionneur de soupape selon l'invention est caractérisé en ce que l'électroaimant de commande de fermeture et l'électroaimant de commande d'ouverture sont du type polarisé et en ce que la commande de commutation d'une position à une autre s'effectue seulement par un courant de défluxage, c'est-à-dire un courant qui s'oppose à l'effet de blocage de la palette en position fermée ou en position ouverte, la suite du mouvement de la palette étant alors commandée uniquement par les ressorts.A valve actuator according to the invention is characterized in that the closing control electromagnet and the control electromagnet are of the polarized type and that the control of switching from one position to another is only defluxing current, that is to say a current which opposes the effect of blocking the pallet in the closed position or in the open position, following the movement of the pallet being then controlled solely by the springs.

Dans ces conditions, la consommation en énergie électrique pour la commutation est minimisée.Under these conditions, the consumption of electrical energy for the switching is minimized.

En outre, en cas de dysfonctionnement de la bobine de l'électroaimant de commande de fermeture, si la soupape est en position fermée, celle-ci reste dans cet état et, si la soupape est en position ouverte, la fermeture peut être commandée puisque, pour passer de la position ouverte à la position fermée, on agit sur la bobine de l'électroaimant de commande d'ouverture qui, par hypothèse, fonctionne correctement.In addition, in case of malfunction of the electromagnet coil of closing command, if the valve is in the closed position, the latter remains in this state and, if the valve is in the open position, the closure can be ordered since, to move from the open position to the closed position, we act on the coil of the control electromagnet opening which, by hypothesis, works correctly.

Si la bobine de l'électroaimant de commande d'ouverture est défaillante et si la palette se trouve en position fermée, on maintient à zéro le courant dans la bobine de l'électroaimant de commande de fermeture afin que la soupape reste fermée. Si la bobine de l'électroaimant de commande d'ouverture est défaillante et si la palette se trouve au milieu de sa course, on applique à la bobine de l'électroaimant de commande de fermeture un courant pour positionner la soupape en position fermée ; ensuite, le courant dans cette dernière bobine est ramené à zéro. If the coil of the opening control electromagnet is faulty and if the pallet is in the closed position, the current is kept at zero in the coil of the closing control electromagnet so that the valve remains closed. If the coil of the control electromagnet opening is faulty and if the pallet is in the middle of its course, the coil of the closure control electromagnet is applied to current to position the valve in the closed position; then, the current in this last coil is reduced to zero.

Ainsi, en cas de défaillance d'une bobine de l'un des électroaimants, le moteur peut être arrêté à soupape fermée. On sait en effet qu'un moteur arrêté à soupapes fermées assure un freinage ou blocage lorsque le véhicule est à l'arrêt.Thus, in case of failure of a coil of one of the electromagnets, the motor can be stopped with closed valve. We know that an engine stopped with closed valves provides braking or blocking when the vehicle is stopped.

Les bobines des deux électroaimants peuvent être en série ou en parallèle ou indépendantes l'une de l'autre. Quand les bobines sont en parallèle, si l'une des bobines est en circuit ouvert (du fait d'une panne), elle ne perturbe pas le fonctionnement de l'autre bobine. Quand les bobines sont en série, le court-circuit d'une bobine n'empêche pas le fonctionnement de l'autre bobine. On préfère le montage des bobines en parallèle au montage des bobines en série car la déconnexion d'une bobine est plus probable qu'un court-circuit.The coils of the two electromagnets can be in series or in parallel or independent of each other. When the coils are in parallel, if one of the coils is in open circuit (because of a breakdown), it does not does not disturb the operation of the other coil. When the reels are in series, the short circuit of a coil does not prevent the operation of the other coil. It is preferred to mount the coils in parallel with the assembly coils in series because the disconnection of a coil is more likely than a short circuit.

L'invention concerne, de façon générale, un dispositif d'actionnement de soupape pour moteur à combustion interne comprenant un organe de type ferromagnétique lié à la soupape et déplaçable selon une course pour laquelle à une extrémité de cette course la soupape est en position fermée et à une autre extrémité de la course , cette soupape est en position ouverte, la commande du déplacement s'effectuant à l'aide d' un premier et d'un second électroaimants et de moyens à ressort(s) de façon telle que l'organe soit à proximité d'un premier électroaimant pour la position fermée de la soupape et à proximité du second électroaimant pour la position ouverte de la soupape, qui est caractérisé en ce que, les deux électroaimants étant du type polarisé avec chacun un aimant permanent permettant de maintenir l'organe à l'extrémité correspondante de sa course en l'absence de courant dans la bobine correspondante de cet électroaimant, il comprend des moyens de commande pour faire passer la soupape de sa position d'ouverture à sa position de fermeture ou de sa position de fermeture à sa position d'ouverture, comportant des moyens pour appliquer à la bobine du second électroaimant ou à la bobine du premier électroaimant, seulement une impulsion de défluxage s'opposant à l'effet de l'aimant permanent de l'électroaimant correspondant, la commutation s'effectuant, suite à cette impulsion de défluxage, par la seule action des moyens à ressort.The invention relates, in general, to a device for actuating valve for an internal combustion engine comprising a member of the type ferromagnetic connected to the valve and movable in a race for which at one end of this stroke the valve is in the closed position and at another end of the stroke, this valve is in position open, the control of the displacement being carried out using a first and second electromagnets and spring means (s) in such a way that the member is close to a first electromagnet for the closed position of the valve and near the second electromagnet for the position open of the valve, which is characterized in that, both electromagnets being of the polarized type with each a permanent magnet to hold the organ at the corresponding end of its stroke in the absence of current in the corresponding coil of this electromagnet, it comprises control means for passing the valve from its open position to its closed position or its closing position to its open position, comprising means to apply to the coil of the second electromagnet or to the coil of the first electromagnet, only a defluxing impulse opposing the effect of the permanent magnet of the corresponding electromagnet, the switching is effected, following this defluxing pulse, by the only action of the spring means.

Dans une réalisation, le dispositif comporte un moyen de détection du fonctionnement des bobines des électroaimants et un moyen de sécurité pour, en cas de défaillance de l'une des bobines, appliquer à la bobine de l'électroaimant non défaillant, un courant permettant de positionner la soupape en position de fermeture. Dans ce cas, le moyen de sécurité peut comporter un moyen pour, en cas de défaillance de bobine du second électroaimant, appliquer à la bobine du premier électroaimant un courant permettant à l'organe de se déplacer vers ce premier électroaimant.In one embodiment, the device comprises a means for detecting the operation of the coils of electromagnets and a means of safety in case of failure of one of the coils, apply to the coil of the non-faulty electromagnet, a current allowing to position the valve in the closed position. In this case, the security means may include means for, in case of coil failure of the second electromagnet, apply to the coil of the first electromagnet a current allowing the member to move towards this first electromagnet.

L'invention concerne aussi un moteur comportant un dispositif d'actionnement du type défini ci-dessus.The invention also relates to an engine comprising a device actuating the type defined above.

D'autres caractéristiques et avantages de l'invention apparaítront avec la description de certains de ses modes de réalisation, celle-ci étant effectuée en se référant aux dessins annexés sur lesquels :Other features and advantages of the invention will appear with the description of some of its embodiments, this being done with reference to the accompanying drawings in which:

la figure 1 est un schéma de dispositif d'actionnement de soupape selon l'invention, etFIG. 1 is a diagram of valve actuation device according to the invention, and

les figures 2a et 2b sont des diagrammes illustrant le fonctionnement d'un actionneur de soupape selon la figure 1.Figures 2a and 2b are diagrams illustrating the operation of a valve actuator according to Figure 1.

Sur la figure 1, on a représenté une réalisation d'actionneur selon l'invention dans lequel on prévoit, d'une part, un électroaimant de commande de fermeture du type polarisé, avec un aimant permettant de bloquer la soupape en position fermée en l'absence de courant dans la bobine correspondante de l'électroaimant et, d'autre part, un électroaimant de commande d'ouverture, également de type polarisé, dont l'aimant permet aussi, en l'absence de courant dans la bobine correspondante, de maintenir la soupape en position d'ouverture.FIG. 1 shows an embodiment of an actuator according to the invention in which there is provided, on the one hand, a control electromagnet of closure of the polarized type, with a magnet to block the valve in closed position in the absence of current in the coil electromagnet and, on the other hand, an electromagnet opening control, also of polarized type, whose magnet allows also, in the absence of current in the corresponding coil, keep the valve in the open position.

Ainsi, sur cette figure 1, on a représenté une palette ou plateau magnétique 10 solidaire d'une tige 12 coopérant avec une queue 14 d'une soupape 16.Thus, in this figure 1, there is shown a pallet or magnetic plate 10 integral with a rod 12 cooperating with a tail 14 of a valve 16.

L'électroaimant 18 de commande de fermeture comporte un circuit magnétique 20, un aimant permanent 22 et une bobine de commande 24.The closure control electromagnet 18 comprises a circuit magnet 20, a permanent magnet 22 and a control coil 24.

L'électroaimant 26 de commande d'ouverture comporte un circuit magnétique 28, un aimant permanent 30 et une bobine de commande 32.The opening control electromagnet 26 has a circuit magnetic 28, a permanent magnet 30 and a control coil 32.

Un ressort 36 entoure la queue de soupape 14. Il est disposé de façon telle qu'il soit comprimé quand la soupape 16 est en position d'ouverture (vers le bas sur la figure 1) et détendu dans le cas où la soupape 16 est en position de fermeture (vers le haut dans la représentation de la figure 1).A spring 36 surrounds the valve stem 14. It is arranged in such a way it is compressed when the valve 16 is in the open position (towards the bottom in Figure 1) and relaxed in the case where the valve 16 is in position closing (upwards in the representation of Figure 1).

De même, un ressort 38 entoure la tige 12 et est disposé de façon telle qu'il soit comprimé quand la soupape est en position de fermeture et détendu quand la soupape est en position d'ouverture.Similarly, a spring 38 surrounds the rod 12 and is arranged in such a way that compressed when the valve is in the closed and relaxed position when the valve is in the open position.

Lorsque l'actionneur représenté sur la figure 1 fonctionne normalement (sans défaillance), le plateau 10 est attiré vers le circuit magnétique 20 grâce à l'alimentation de la bobine 24 et à l'effet de l'aimant permanent 22. Le courant dans la bobine 24 est nul quand la soupape est en position fermée car l'aimant 22 suffit à maintenir le plateau 10 contre le circuit magnétique 20. Dans cette position, le ressort 36 est détendu et le ressort 38 est comprimé.When the actuator shown in FIG. 1 operates normally (without failure), the plate 10 is attracted to the magnetic circuit 20 thanks to the supply of the coil 24 and to the effect of the permanent magnet 22. The current in the coil 24 is zero when the valve is in position closed because the magnet 22 is sufficient to hold the plate 10 against the circuit 20. In this position, the spring 36 is relaxed and the spring 38 is compressed.

Pour passer de la position de fermeture à la position d'ouverture, on prévoit un courant de défluxage dans la bobine 24 qui s'oppose à l'effet de l'aimant permanent 22, c'est-à-dire à un courant de sens contraire à celui qui est utilisé pour attirer le plateau 10 vers le circuit 20.To move from the closed position to the open position, provision is made a defluxing current in the coil 24 which opposes the effect of the magnet permanent 22, that is to say, a current of direction contrary to that which is used to draw the tray 10 to the circuit 20.

Grâce à l'effet de ce courant de défluxage et à l'effet du ressort 38, le plateau 10 se dirige vers le circuit 28. Ensuite, l'aimant permanent 30 attire le plateau 10 sans qu'il soit nécessaire d'alimenter la bobine 32.Thanks to the effect of this defluxing current and to the effect of the spring 38, the plate 10 goes to the circuit 28. Then the permanent magnet 30 attracts the plate 10 without it being necessary to feed the coil 32.

Le passage de la position d'ouverture à la position de fermeture s'effectue de manière analogue par application d'un courant de défluxage dans la bobine 32.The transition from the open position to the closed position is effected similarly by applying a defluxing current in the coil 32.

En cas de défaillance de la bobine 24, cette défaillance pouvant être également détectée par une absence de courant malgré une commande d'alimentation, on applique à la bobine 32 un courant dit de défluxage qui permet de repousser le plateau vers le circuit 20 et donc de commander la position de la soupape 16 en position fermée. La soupape 16 peut alors rester dans cette position grâce à l'effet de l'aimant permanent 22.In case of failure of the coil 24, this failure can be also detected by a lack of power despite a command supply, a coil of current 32 is applied to the coil 32 which allows the tray to be pushed back to the circuit 20 and thus to control the position of the valve 16 in the closed position. The valve 16 can then stay in this position thanks to the effect of the permanent magnet 22.

Ainsi, quelle que soit la bobine défaillante, la soupape peut être maintenue en position fermée.Thus, whatever the faulty coil, the valve can be maintained in closed position.

Sur la figure 2a, on a représenté la commutation de la position fermée à la position ouverte de la soupape. Sur les diagrammes de la figure 2a, on a porté le temps en abscisses et en ordonnées, sur le diagramme du haut, la position et la vitesse de la soupape ou du plateau, et sur le diagramme du bas, l'intensité du courant circulant dans la bobine 24.FIG. 2a shows the switching from the closed position to the open position of the valve. On the diagrams in Figure 2a, we have carried the time on the abscissa and on the ordinate, on the top diagram, the position and speed of the valve or tray, and on the diagram of the low, the intensity of the current flowing in the coil 24.

La courbe 50 représente la position de la soupape. Sur la partie 52 de cette courbe 50, la soupape est en position fermée et sur la partie 54, la soupape est en position ouverte. La courbe 56 représente la variation de la vitesse de la soupape ou du plateau. Sur le diagramme du bas, on a représenté par la courbe 58, l'intensité du courant dans la bobine 24. Cette intensité est nulle sauf pour une impulsion 60 pendant laquelle on applique le courant de défluxage. Par ailleurs, le courant dans la bobine 32 est maintenu à zéro.Curve 50 represents the position of the valve. On part 52 of this curve 50, the valve is in the closed position and on the part 54, the valve is in the open position. Curve 56 represents the variation of the speed valve or tray. On the bottom diagram, it is shown by the curve 58, the intensity of the current in the coil 24. This intensity is zero except for a pulse 60 during which the defluxing current. Moreover, the current in the coil 32 is kept at zero.

La figure 2b représente la commutation de la position ouverte à la position fermée de la soupape. Dans ce cas, on applique à la bobine 32, un courant de défluxage qui s'oppose au maintien du plateau 10 contre le circuit 28 et aucun courant n'est appliqué à la bobine 24.Figure 2b shows the switching from the open position to the position closed of the valve. In this case, a current is applied to the coil 32 of defluxing which opposes the maintenance of the plate 10 against the circuit 28 and no current is applied to the coil 24.

Sur les diagrammes de la figure 2b, la courbe 62 représente la variation de la position de la soupape depuis la position ouverte 64 vers la position fermée 66. La courbe 68 représente la variation de la vitesse de la soupape et sur le diagramme du bas de la figure 2b, on a représenté par la courbe 70, la variation du courant dans la bobine 32. L'intensité du courant dans cette bobine reste égale à zéro sauf pendant l'application d'une impulsion 72 de défluxage.In the diagrams of Figure 2b, the curve 62 represents the variation of the position of the valve from the open position 64 to the position closed 66. Curve 68 represents the variation of the speed of the valve and on the bottom diagram of Figure 2b, the curve is represented 70, the variation of the current in the coil 32. The intensity of the current in this coil remains equal to zero except during the application of a pulse 72 of defluxing.

Ainsi, la commutation d'une position à une autre ne nécessite qu'une faible consommation d'énergie électrique.Thus, switching from one position to another only requires a weak power consumption.

Par ailleurs, en cas de défaillance de la bobine 24, un courant appliqué à la bobine 32 permet de commander la soupape vers la position fermée.Moreover, in case of failure of the coil 24, a current applied to the coil 32 allows to control the valve to the closed position.

Quelle que soit la bobine défaillante, la soupape peut être maintenue en position fermée.Whatever the faulty coil, the valve can be maintained in closed position.

Claims (4)

Dispositif d'actionnement de soupape pour moteur à combustion interne comprenant un organe (10) de type ferromagnétique lié à la soupape et déplaçable selon une course pour laquelle à une extrémité de cette course la soupape est en position fermée et à une autre extrémité de la course , cette soupape est en position ouverte, la commande du déplacement s'effectuant à l'aide d'un premier (18) et d'un second (26) électroaimants et de moyens à ressort(s) (36, 38) de façon telle que l'organe (10) soit à proximité d'un premier électroaimant pour la position fermée de la soupape et à proximité du second électroaimant pour la position ouverte de la soupape, caractérisé en ce que, les deux électroaimants étant du type polarisé avec chacun un aimant permanent (22, 30) permettant de maintenir l'organe (10) à l'extrémité correspondante de sa course en l'absence de courant dans la bobine correspondante de cet électroaimant, pour faire passer la soupape de sa position d'ouverture à sa position de fermeture ou de sa position de fermeture à sa position d'ouverture, on applique à la bobine du second électroaimant ou à la bobine du premier électroaimant, seulement une impulsion de défluxage s'opposant à l'effet de l'aimant permanent de l'électroaimant correspondant, la commutation s'effectuant, suite à cette impulsion de défluxage, par la seule action des moyens à ressort. Valve actuating device for an internal combustion engine comprising a ferromagnetic type member (10) connected to the valve and displaceable in a stroke for which at one end of this stroke the valve is in the closed position and at another end of the this valve is in the open position, the displacement is controlled by means of a first (18) and a second (26) electromagnet and spring means (36, 38). such that the member (10) is close to a first electromagnet for the closed position of the valve and close to the second electromagnet for the open position of the valve, characterized in that the two electromagnets are of the polarized type each with a permanent magnet (22, 30) for holding the member (10) at the corresponding end of its stroke in the absence of current in the corresponding coil of this electromagnet, to pass the valve of its position opening ion to its closed position or its closed position to its open position, is applied to the coil of the second electromagnet or the coil of the first electromagnet, only a defluxing pulse opposing the effect of the permanent magnet of the corresponding electromagnet, switching being effected, following this defluxing pulse, by the sole action of the spring means. Dispositif selon la revendication 1 caractérisé en ce qu'il comporte un moyen de détection du fonctionnement des bobines des électroaimants et un moyen de sécurité pour, en cas de défaillance de l'une des bobines, appliquer à la bobine de l'électroaimant non défaillant un courant permettant de positionner la soupape en position de fermeture.Device according to claim 1 characterized in that it comprises a means for detecting the operation of the coils of the electromagnets and a safety means for, in the event of failure of one of the coils, to apply to the coil of the non-defective electromagnet a current for positioning the valve in the closed position. Dispositif selon la revendication 2, caractérisé en ce que le moyen de sécurité comporte un moyen pour, en cas de défaillance de bobine du second électroaimant, appliquer à la bobine du premier électroaimant un courant permettant à l'organe (10) de se déplacer vers ce premier électroaimant.Device according to claim 2, characterized in that the safety means comprises means for, in the event of a coil failure of the second electromagnet, applying to the coil of the first electromagnet a current allowing the member (10) to move towards this first electromagnet. Moteur comportant un dispositif selon l'une des revendications 1 à 3.Motor comprising a device according to one of claims 1 to 3.
EP05300063A 2004-02-03 2005-01-26 Electromagnetic valve actuator in an internal combustion engine Not-in-force EP1561915B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0450201A FR2865763B1 (en) 2004-02-03 2004-02-03 ELECTROMECHANICAL VALVE ACTUATOR FOR INTERNAL COMBUSTION ENGINE VALVE
FR0450201 2004-02-03

Publications (3)

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EP1561915A2 true EP1561915A2 (en) 2005-08-10
EP1561915A3 EP1561915A3 (en) 2008-09-03
EP1561915B1 EP1561915B1 (en) 2011-01-05

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EP05300063A Not-in-force EP1561915B1 (en) 2004-02-03 2005-01-26 Electromagnetic valve actuator in an internal combustion engine

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US (1) US7111596B2 (en)
EP (1) EP1561915B1 (en)
AT (1) ATE494459T1 (en)
DE (1) DE602005025706D1 (en)
ES (1) ES2359250T3 (en)
FR (1) FR2865763B1 (en)

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FR2895594B1 (en) * 2005-12-22 2008-03-07 Sagem Defense Securite DEVICE FOR LINEAR DISPLACEMENT OF A BODY BETWEEN TWO PREDETERMINED POSITIONS
US8662071B2 (en) * 2011-02-14 2014-03-04 Bsh Home Appliances Corporation Household gas appliance with a magnetically controlled gas supply system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1047028A (en) * 1996-07-31 1998-02-17 Suzuki Motor Corp Controller for solenoid valve type engine
EP1010866A2 (en) * 1998-12-07 2000-06-21 Toyota Jidosha Kabushiki Kaisha Electromagnetic valve actuator
EP1174595A1 (en) * 2000-07-18 2002-01-23 Peugeot Citroen Automobiles SA Valve actuator for internal combustion engine
US20030080306A1 (en) * 2001-10-26 2003-05-01 Toyota Jidosha Kabushiki Kaisha Method of controlling current applied to electromagnetically driven valve and control system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829947A (en) * 1987-08-12 1989-05-16 General Motors Corporation Variable lift operation of bistable electromechanical poppet valve actuator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1047028A (en) * 1996-07-31 1998-02-17 Suzuki Motor Corp Controller for solenoid valve type engine
EP1010866A2 (en) * 1998-12-07 2000-06-21 Toyota Jidosha Kabushiki Kaisha Electromagnetic valve actuator
EP1174595A1 (en) * 2000-07-18 2002-01-23 Peugeot Citroen Automobiles SA Valve actuator for internal combustion engine
US20030080306A1 (en) * 2001-10-26 2003-05-01 Toyota Jidosha Kabushiki Kaisha Method of controlling current applied to electromagnetically driven valve and control system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06, 30 avril 1998 (1998-04-30) & JP 10 047028 A (SUZUKI MOTOR CORP), 17 février 1998 (1998-02-17) *

Also Published As

Publication number Publication date
FR2865763B1 (en) 2010-08-20
FR2865763A1 (en) 2005-08-05
US7111596B2 (en) 2006-09-26
DE602005025706D1 (en) 2011-02-17
ATE494459T1 (en) 2011-01-15
ES2359250T3 (en) 2011-05-19
EP1561915B1 (en) 2011-01-05
US20050199198A1 (en) 2005-09-15
EP1561915A3 (en) 2008-09-03

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