EP1519012A2 - Dispositif de commande de soupape pour moteur à combustion interne et moteur à combustion interne comprenant un tel dispositif - Google Patents
Dispositif de commande de soupape pour moteur à combustion interne et moteur à combustion interne comprenant un tel dispositif Download PDFInfo
- Publication number
- EP1519012A2 EP1519012A2 EP04300611A EP04300611A EP1519012A2 EP 1519012 A2 EP1519012 A2 EP 1519012A2 EP 04300611 A EP04300611 A EP 04300611A EP 04300611 A EP04300611 A EP 04300611A EP 1519012 A2 EP1519012 A2 EP 1519012A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- opening
- current
- defluxing
- engine
- 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 present invention relates to a device for valve control for internal combustion engine and at a internal combustion engine comprising such a device, in particular for controlling a valve by means of an actuator electromechanical with a magnet.
- a device 100 provided with an actuator 102 electromechanical valve 110 generally has springs 102 and 103 and electromagnets 106 and 108 for control the position of the valve 110 by means of signals Electrical controlled by a processor 101.
- these electrical signals include currents for generating magnetic fields to move or hold the valve 110 in a given position.
- the tail of the valve 110 is applied against the rod 112 of a magnetic plate 114 movable between the two electromagnets 106 and 108 so that, depending on the fields the plateau, the latter is move or hold in a position such that the valve 110 is open ( Figure 1a), allowing gas admission in cylinder 117, or closed (FIG. 1b), blocking the admission of gas into this cylinder 117.
- the displacement of the valve 110 in an open position is obtained by controlling a current I and of attraction in the coil 107 of the electromagnet 106 which then attracts the plate 114 by means of a magnetic field H at , the shaft 112 of the plate moving the valve 110 in the open position.
- the actuator 102 can be provided magnets 118 (electromagnet 108) and 116 (electromagnet 106), this last being represented in FIG. 1b, intended to optimize the operation of the device, in particular by reducing the noise actuator operation and the energy required to attracting and maintaining the tray 114 in a position switched.
- each magnet is located on an electromagnet so that its magnetic field H ai maintains the movable plate against this electromagnet, as shown in Figure 1a.
- the magnetic field H ai of the magnet participates in the attraction of the plate and, subsequently, this magnetic field H ai makes it possible to hold the plate 114 against an electromagnet with a reduced or even zero holding current.
- the current I die defluxing has an opposite direction in the coils of an electromagnet in the direction of the current I at attraction.
- a processor control strategy should therefore be set to determine the current I die weakening providing the control required valve.
- the energy required by the defluxing current influences the electrical consumption of the actuator (ordinate axis 304) so that an optimum energy 306 can be obtained for a switching delay ⁇ t1 ( Figure 4, the y-axis 400 representing switching times) greater than the delay ⁇ t o minimum switch, this delay ⁇ t o minimum requiring greater electrical energy.
- the power consumption of the low engine speed device while the lengthening of the switching time of the valve can correspond to the cycle longer engine of a low speed engine.
- the present invention results from the observation that control of the defluxing current according to the only regime motor has the disadvantage of not allowing a good optimization of the operation of an electromagnet actuator.
- an actuator electromagnet makes it possible to control a valve according to many parameters other than the engine speed, as example the pressure of the gases at the inlet of a cylinder, the rate of exhaust gases recycled in the intake gases, the quantity of gas to be admitted to the cylinder and / or the number of active valves.
- the deceleration of a vehicle from a rpm raised by a driver's foot lift vis-à-vis the accelerator pedal reduces the load to the lowest achievable according to the speed up to a return to engine speed slow motion.
- the invention results from the finding that, as detailed later, a variation of the speed opening and / or closing of a valve has an influence even lower than the duration during which the valve is open and / or closed is large.
- the present invention relates to a control device of a combustion engine valve internal, this device comprising an electromechanical actuator equipped with a magnet and a processor controlling a current of defluxing generating a magnetic field opposite to the field magnet, characterized in that it comprises means for controlling this defluxing current according to the valve opening time and means for determining a speed of opening and / or closing of the valve to from its opening time, the controlled defluxing current ensuring the speed of opening and / or closure determined.
- Such a device has the advantage of controlling the current of defluxing of the actuator according to the duration opening of the valve without prejudging the way it is determined, and not according to the state of the engine, described for example by the engine speed, as disclosed by the prior art, thus optimizing the operation of the actuator.
- the duration opening of a valve is not descriptive of the condition of the engine, including his diet.
- the determining a speed of opening and / or closing minimizes the energy consumption of the actuator while corresponding to the energy requirement of the engine.
- the device comprises means to determine a speed of opening and / or closing of the valve from its opening time, the controlled defluxing current ensuring quick opening and / or determined closure.
- the device comprises means to control the defluxing current by modifying its intensity and / or duration.
- the device comprises means for determining the opening time of the valve at from engine parameters such as the engine speed, the amount of air admitted into the cylinder concerned, the pressure of the gas at the intake, the exhaust gas recirculation rate in intake gas and the number of active intake valves cylinder.
- the magnet located on a electromagnet of the actuator, ensures the maintenance of the valve in an open or closed position without requiring a current of maintenance.
- the actuator comprises two electromagnets, each electromagnet being provided with a magnet, by example to ensure the maintenance of the valve in a position open or closed without requiring a holding current.
- the invention also relates to a combustion engine internally provided with a device for controlling a valve, this device comprising an electromechanical actuator provided with a magnet and a processor controlling a defluxing current generating a magnetic field opposite to the magnetic field of the magnet, characterized in that it comprises means for order this flow of defluxing according to the duration opening of the valve and means for determining a speed of opening and / or closing of the valve from its opening time, the defluxing current ordered ensuring the speed of opening and / or closure determined.
- the engine comprises means to determine a speed of opening and / or closing of the valve from its opening time, the current of controlled inflighting ensuring the speed of opening and / or determined closure.
- the engine comprises means to control the defluxing current by modifying its intensity and / or duration.
- the engine comprises means to determine the opening time of the valve from engine parameters such as engine speed, quantity of air admitted into the cylinder concerned, the pressure of the gases admission, the rate of recycling of the exhaust gases intake and the number of active intake valves cylinder.
- the example of device 500 (FIG. the invention described below uses a processor 501 controlling the defluxing current flowing in the coil 507 of the electromagnet 506 of a valve actuator 502 510.
- This processor 501 receives, from another processor (not shown) or internally, that is to say, the same processor 501, an opening instruction of the valve 510 determining the time and duration of this opening.
- the processor 501 determines how quickly the opening and / or closing of a valve must be carried out considering that, as detailed below using Figures 6a and 6b, the speed required to open a valve is a function of the duration of its opening.
- the durations dt are represented by considering a first defluxing current Idé1 (dashed curve) and a second defluxing current Idé2 (continuous curve) of intensity and duration inferior to those of the first current Ide1.
- the processor 501 includes means for determining a speed of opening minimum according to the duration of opening determined for the valve, this minimum opening speed allowing minimize the energy consumption of the actuator while corresponding to the need for engine operation.
- the 501 processor can determine the defluxing current required to obtain this rapidity of opening, for example by means of a mapping.
- the present invention is susceptible of many variants. Thus, it is possible to implement the invention in different actuators comprising one or two electromagnets.
- the invention may apply to a actuator of which a single electromagnet is provided with a magnet, the magnet allowing, for example, the maintenance of the valve in closed position.
- the invention can be implemented in considering a magnet generating a sufficient magnetic field important to maintain the valve in a fixed position, or switched, regardless of the number of electromagnets provided with lack of magnet (s).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
- Les figures 1a et 1b, déjà décrites, sont des schémas d'un actionneur électromécanique connu,
- Les figures 2a et 2b, déjà décrites, représentent des différences de rapidité de commutation d'une soupape commandée selon des courants de défluxage distincts,
- La figure 3, déjà décrite, est une courbe relative à l'énergie consommée par un actionneur utilisant un courant de défluxage,
- La figure 4, déjà décrite, est une courbe relative au délai de commutation d'une soupape commandée par un actionneur utilisant un courant de défluxage,
- La figure 5 est un schéma d'un dispositif conforme à l'invention, et
- Les figures 6a et 6b représentent la mise en oeuvre d'une commande de courant de défluxage conforme à l'invention.
Claims (8)
- Dispositif (500) de commande d'une soupape (510) de moteur à combustion interne, ce dispositif comprenant un actionneur électromécanique (502) muni d'un aimant et un processeur (501) commandant un courant (Idé) de défluxage générant un champ magnétique opposé au champ magnétique de l'aimant, caractérisé en ce qu'il comprend des moyens (501) pour commander ce courant (Idé) de défluxage en fonction de la durée (dt) d'ouverture de la soupape (510) et des moyens pour déterminer une rapidité d'ouverture et/ou de fermeture de la soupape (510) à partir de cette durée (dt) d'ouverture, le courant (Idé) de défluxage commandé assurant la rapidité d'ouverture et/ou de fermeture déterminée.
- Dispositif selon la revendication 1 caractérisé en ce qu'il comprend des moyens pour contrôler le courant (Idé) de défluxage en modifiant son intensité et/ou sa durée.
- Dispositif selon la revendication 1 ou 2 caractérisé en ce qu'il comprend des moyens pour déterminer la durée (dt) d'ouverture de la soupape à partir de paramètres moteurs tels que le régime (R) du moteur, la quantité (Q) d'air admise dans le cylindre concerné, la pression (P) des gaz à l'admission, le taux (T) de recyclage des gaz d'échappement en gaz d'admission et le nombre (N) de soupapes d'admission actives par cylindre.
- Dispositif selon la revendication 1, 2 ou 3 caractérisé en ce que l'aimant, situé sur un électroaimant (506, 508) de l'actionneur (502), assure le maintien de la soupape (510) dans une position ouverte ou fermée sans requérir un courant de maintien.
- Dispositif selon l'une des revendications précédentes caractérisé en ce que, l'actionneur (502) comprenant deux électroaimants (506, 508), chaque électroaimant (506, 508) est muni d'un aimant, par exemple pour assurer le maintien de la soupape (510) dans une position ouverte ou fermée sans requérir un courant de maintien.
- Moteur à combustion interne muni d'un dispositif de commande d'une soupape (510), ce dispositif comprenant un actionneur électromécanique (502) muni d'un aimant et un processeur (501) commandant un courant (Idé) de défluxage générant un champ magnétique opposé au champ magnétique de l'aimant, caractérisé en ce qu'il comprend des moyens pour commander ce courant de défluxage en fonction de la durée (dt) d'ouverture de la soupape et des moyens pour déterminer une rapidité d'ouverture et/ou de fermeture de la soupape à partir de sa durée d'ouverture, le courant de défluxage commandé assurant la rapidité d'ouverture et/ou de fermeture déterminée.
- Moteur selon la revendication 6 caractérisé en ce qu'il comprend des moyens pour contrôler le courant de défluxage en modifiant son intensité et/ou sa durée.
- Moteur selon la revendication 6 ou 7 caractérisé en ce qu'il comprend des moyens pour déterminer la durée d'ouverture de la soupape à partir de paramètres moteurs tels que le régime (R) du moteur, la quantité (Q) d'air admise dans le cylindre concerné, la pression (P) des gaz à l'admission, le taux (T) de recyclage des gaz d'échappement en gaz d'admission et le nombre (N) de soupapes d'admission actives par cylindre.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0350605A FR2860032B1 (fr) | 2003-09-24 | 2003-09-24 | Dispositif de commande de soupape pour moteur a combustion interne et moteur a combustion interne comprenant un tel dispositif |
| FR0350605 | 2003-09-24 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1519012A2 true EP1519012A2 (fr) | 2005-03-30 |
| EP1519012A3 EP1519012A3 (fr) | 2008-09-03 |
| EP1519012B1 EP1519012B1 (fr) | 2016-11-16 |
Family
ID=34179012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04300611.3A Expired - Lifetime EP1519012B1 (fr) | 2003-09-24 | 2004-09-17 | Dispositif de commande de soupape pour moteur à combustion interne et moteur à combustion interne comprenant un tel dispositif |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7069886B2 (fr) |
| EP (1) | EP1519012B1 (fr) |
| FR (1) | FR2860032B1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2875264A1 (fr) * | 2004-09-14 | 2006-03-17 | Yterium Entpr Unipersonnelle A | Pilotage du courant de commande d'un actionneur de soupape avec aimant permanent pour moteur a combustion interne et moteur a combustion interne comprenant un tel dispositif et pilote de telle facon |
| ITGE20080036A1 (it) * | 2008-04-30 | 2009-11-01 | Dott Ing Mario Cozzani Srl | Metodo per il controllo della posizione di un attuatore elettromeccanico per valvole di compressori alternativi. |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2707127B2 (ja) * | 1988-12-28 | 1998-01-28 | 株式会社いすゞセラミックス研究所 | 電磁力バルブ駆動装置 |
| DE3920931A1 (de) * | 1989-06-27 | 1991-01-03 | Fev Motorentech Gmbh & Co Kg | Elektromagnetisch arbeitende stelleinrichtung |
| FR2784497B1 (fr) * | 1998-10-07 | 2000-12-15 | Sagem | Actionneur electromagnetique a palette aimantee |
| JP3846070B2 (ja) * | 1998-10-29 | 2006-11-15 | トヨタ自動車株式会社 | 電磁駆動弁の制御装置 |
| JP4126787B2 (ja) * | 1998-12-07 | 2008-07-30 | トヨタ自動車株式会社 | 電磁駆動装置 |
| JP3508636B2 (ja) * | 1999-08-19 | 2004-03-22 | 日産自動車株式会社 | 電磁駆動吸排気弁の制御装置 |
| US6532919B2 (en) * | 2000-12-08 | 2003-03-18 | Ford Global Technologies, Inc. | Permanent magnet enhanced electromagnetic valve actuator |
| JP2002364391A (ja) * | 2001-06-08 | 2002-12-18 | Toyota Motor Corp | 電磁駆動弁の中立位置変化検出装置 |
-
2003
- 2003-09-24 FR FR0350605A patent/FR2860032B1/fr not_active Expired - Fee Related
-
2004
- 2004-09-17 EP EP04300611.3A patent/EP1519012B1/fr not_active Expired - Lifetime
- 2004-09-23 US US10/947,685 patent/US7069886B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2860032A1 (fr) | 2005-03-25 |
| US20050081806A1 (en) | 2005-04-21 |
| FR2860032B1 (fr) | 2007-07-20 |
| US7069886B2 (en) | 2006-07-04 |
| EP1519012B1 (fr) | 2016-11-16 |
| EP1519012A3 (fr) | 2008-09-03 |
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