EP1561914A2 - Perfectionnements apportés à un actionneur électromécanique de soupape de moteur à combustion interne - Google Patents
Perfectionnements apportés à un actionneur électromécanique de soupape de moteur à combustion interne Download PDFInfo
- Publication number
- EP1561914A2 EP1561914A2 EP05300062A EP05300062A EP1561914A2 EP 1561914 A2 EP1561914 A2 EP 1561914A2 EP 05300062 A EP05300062 A EP 05300062A EP 05300062 A EP05300062 A EP 05300062A EP 1561914 A2 EP1561914 A2 EP 1561914A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- electromagnet
- valve
- coil
- current
- permanent magnet
- 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
-
- 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 invention aims to improve the operational safety of such a device valve control. It is also intended to increase the possibilities to control a valve actuator.
- the valve actuator according to the invention is characterized in that the electromagnet for controlling the closure of the valve is polarized type and is such that the valve is held in the closed position by the sole effect of the magnet (or magnets) of the magnetic circuit, without power supply of the corresponding coil, and in that the electromagnet intended to control the opening is such that it requires a supply current of the corresponding coil to maintain the valve in full open position.
- the pallet under the effect of the spring associated with the opening position, is positioned between the two electromagnets and the valve can be closed thanks to the control electromagnet of closing.
- the motor can be stopped with closed valve.
- an engine stopped with closed valves provides braking or blocking when the vehicle is stationary.
- the engine can continue to run with degraded operation, since the valve can not stay in the fully open position.
- the opening control electromagnet is of the type non-polarized, that is to say devoid of permanent magnet.
- this aperture control electromagnet is of the polarized type, i.e. with a permanent magnet; however, in this case, the permanent magnet must be such that it does not allow the pallet to be locked in position completely open when the current of the corresponding coil is no matter, whatever the temperature.
- the coils of the two electromagnets can be in series or in parallel or independent of each other.
- 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 invention relates, in general, to a device for actuating valve for an internal combustion engine comprising an organ connected to the valve and movable according to a stroke 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 the open position, the control of the moving using first and second electromagnets and spring means (s) in such a way that the organ is near a first electromagnet for the closed position of the valve and near the second electromagnet for the open position of the valve, the device being such that the first electromagnet is of the type polarized with a permanent magnet to maintain the organ in the position corresponding to the closing of the valve in the absence current in the coil of this first electromagnet, and that the second electromagnet is such that the open position is maintained for a non-zero current in the coil of this second electromagnet.
- This device is characterized in that it comprises a detection means the operation of the coils of electromagnets and a means of in case of failure of one of the coils, apply to the coil of the non-faulty electromagnet, a current allowing position the valve in the closed position.
- the security means includes means for, in In case of failure of the coil of the first electromagnet, apply to the coil of the second electromagnet a current such that the organ is pushed back towards the first electromagnet.
- the second electromagnet is of the polarized type, the permanent magnet of this second electromagnet having a magnetic field of insufficient value to oppose the opposite effect of spring means when the organ is in the open position of the valve.
- the second electromagnet is devoid of permanent magnet.
- the device comprises a means for passing the valve from the closed position to the open position, which includes means for applying to the coil of the first electromagnet a defluxing pulse opposing the effect of the permanent magnet of this first electromagnet.
- the coil of the first electromagnet and the coil of the second electromagnet are in parallel.
- the invention also relates to an engine comprising a device as defined above.
- 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 polarized type, but the magnet does not does not, alone, to maintain 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 magnet 30 has been shown with a thickness less than that of the magnet 22 of the electromagnet 18 to show that the attraction effect it exerted is substantially lower than that of this magnet 22.
- 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 plate 10 goes to the circuit 28. Then the coil 32 is powered to draw the tray 10 to the circuit 28.
- the permanent magnet 30 presents insufficient characteristics for the plate 10 to be applied against the circuit 28 in case of zero current in the coil 32. However, the presence of this magnet 30 minimizes the current flowing in this coil 32.
- the plate 10 In case of failure of the coil 32, for example detected by an absence permanent current in this coil, the plate 10 is pushed into intermediate position between the two circuits 20 and 28 by the effect of the spring 38. The valve may then be closed to maintain the engine safety position, temporarily feeding the coil 24 so that the plateau 10 remains applied against the circuit 20.
- the valve can be maintained in closed position.
- FIG. 3a is a diagram on which efforts are shown (EF) on the ordinates and air gap values (E) on the abscissa, the zero air gap corresponding to the plate 10 applied against the magnetic circuit 20.
- Curve 40 represents the force exerted by the electromagnet 18 when the intensity of the electric current in the coil 24 is zero, that is to say the force exerted mainly by the magnet 22.
- the curve 42 represents the efforts of the springs acting in the opposite direction on the plateau 10. On sees as low air gap, the force of the magnet 22 exceeds that of springs, which keeps the board 10 against the circuit magnetic 20.
- the diagram in Figure 3b corresponds to the operation of the electromagnet 26 when the intensity of the current in the coil 32 is zero.
- the zero air gap corresponds to the position for which the plate 10 is applied against the magnetic circuit 28.
- the curve 44 represents the force exerted by the magnet 30 and the curve 46 represents the effort antagonist of the springs. So we see that the effort 46 of the springs is always greater than the force 44 exerted by the permanent magnet 30, in case of nullity of the intensity of the current in the coil 32.
- the embodiment shown in Figure 2 is distinguished only from the one shown in FIG. 1 in that the electromagnet 26 is devoid of permanent magnet.
Landscapes
- 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
Description
Claims (8)
- Dispositif d'actionnement de soupape pour moteur à combustion interne comprenant un organe (10) 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 le premier électroaimant est du type polarisé avec un aimant permanent (22) permettant de maintenir l'organe (10) dans la position correspondant à la fermeture de la soupape en l'absence de courant dans la bobine de ce premier électroaimant, et en ce que le second électroaimant est tel que cette position est maintenue pour un courant non nul dans la bobine (32) de ce second électroaimant.
- Dispositif selon la revendication 1 caractérisé en ce que le second électroaimant est du type polarisé, l'aimant permanent de ce second électroaimant présentant un champ magnétique d'une valeur insuffisante pour s'opposer à l'effet inverse des moyens à ressort quand l'organe (10) se trouve dans la position ouverte de la soupape.
- Dispositif selon la revendication 1 caractérisé en ce que le second électroaimant est dépourvu d'aimant permanent.
- Dispositif selon l'une des revendications 1 à 3 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.
- Dispositif selon la revendication 4 caractérisé en ce que le moyen de sécurité comporte un moyen pour, en cas de défaillance de la bobine du premier électroaimant, appliquer à la bobine du second électroaimant un courant tel que l'organe (10) soit repoussé vers le premier électroaimant.
- 6. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comporte un moyen pour faire passer la soupape de la position de fermeture à la position d'ouverture, qui comprend un moyen pour appliquer à la bobine du premier électroaimant une impulsion de défluxage s'opposant à l'effet de l'aimant permanent de ce premier électroaimant.
- 7. Moteur comportant un dispositif selon l'une des revendications 1 à 6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0450202A FR2865764B1 (fr) | 2004-02-03 | 2004-02-03 | Perfectionnements apportes a un actionneur electromecanique de soupape de moteur a combustion interne |
| FR0450202 | 2004-02-03 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1561914A2 true EP1561914A2 (fr) | 2005-08-10 |
| EP1561914A3 EP1561914A3 (fr) | 2008-09-03 |
| EP1561914B1 EP1561914B1 (fr) | 2010-08-25 |
Family
ID=34673945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05300062A Expired - Lifetime EP1561914B1 (fr) | 2004-02-03 | 2005-01-26 | Perfectionnements apportés à un actionneur électromécanique de soupape de moteur à combustion interne |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7047919B2 (fr) |
| EP (1) | EP1561914B1 (fr) |
| AT (1) | ATE479014T1 (fr) |
| DE (1) | DE602005023085D1 (fr) |
| ES (1) | ES2350186T3 (fr) |
| FR (1) | FR2865764B1 (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2894377B1 (fr) * | 2005-12-02 | 2008-05-16 | Valeo Sys Controle Moteur Sas | Actionneur electromagnetique avec deux electroaimants comportant des aimants de forces differentes, et procede de gestion d'une soupape de moteur a combustion interne faisant application. |
| TWI426195B (zh) * | 2011-09-14 | 2014-02-11 | Univ Nat Taipei Technology | 電子氣閥機構 |
| US10385797B2 (en) | 2011-11-07 | 2019-08-20 | Sentimetal Journey Llc | Linear motor valve actuator system and method for controlling valve operation |
| US9109714B2 (en) | 2011-11-07 | 2015-08-18 | Sentimetal Journey Llc | Linear valve actuator system and method for controlling valve operation |
| US10774696B2 (en) | 2018-02-23 | 2020-09-15 | SentiMetal Journey, LLC | Highly efficient linear motor |
| US10601293B2 (en) | 2018-02-23 | 2020-03-24 | SentiMetal Journey, LLC | Highly efficient linear motor |
| CN113556065A (zh) * | 2021-07-02 | 2021-10-26 | 中国科学院长春光学精密机械与物理研究所 | 一种大口径望远镜安全防护系统 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3920978A1 (de) * | 1989-06-27 | 1991-01-10 | Fev Motorentech Gmbh & Co Kg | Elektromagnetisch arbeitende stelleinrichtung |
| DE3928066A1 (de) * | 1989-08-25 | 1991-02-28 | Binder Magnete | Vorrichtung zur elektromagnetischen steuerung eines gaswechsel-ventils einer hubkolben-brennkraftmaschine |
| JP4126787B2 (ja) * | 1998-12-07 | 2008-07-30 | トヨタ自動車株式会社 | 電磁駆動装置 |
| FR2812024B1 (fr) * | 2000-07-18 | 2003-04-04 | Peugeot Citroen Automobiles Sa | Actionneur de soupapes de moteurs a combustion interne |
| JP3820960B2 (ja) * | 2001-10-26 | 2006-09-13 | トヨタ自動車株式会社 | 電磁駆動弁の脱調検出を伴う通電制御方法 |
-
2004
- 2004-02-03 FR FR0450202A patent/FR2865764B1/fr not_active Expired - Fee Related
-
2005
- 2005-01-26 AT AT05300062T patent/ATE479014T1/de not_active IP Right Cessation
- 2005-01-26 DE DE602005023085T patent/DE602005023085D1/de not_active Expired - Lifetime
- 2005-01-26 ES ES05300062T patent/ES2350186T3/es not_active Expired - Lifetime
- 2005-01-26 EP EP05300062A patent/EP1561914B1/fr not_active Expired - Lifetime
- 2005-01-27 US US11/046,254 patent/US7047919B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1561914A3 (fr) | 2008-09-03 |
| FR2865764B1 (fr) | 2008-01-11 |
| DE602005023085D1 (de) | 2010-10-07 |
| US20050166873A1 (en) | 2005-08-04 |
| US7047919B2 (en) | 2006-05-23 |
| ATE479014T1 (de) | 2010-09-15 |
| FR2865764A1 (fr) | 2005-08-05 |
| ES2350186T3 (es) | 2011-01-19 |
| EP1561914B1 (fr) | 2010-08-25 |
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