EP2250366A1 - Optimisation of the excitation frequency of a radiofrequency plug - Google Patents

Optimisation of the excitation frequency of a radiofrequency plug

Info

Publication number
EP2250366A1
EP2250366A1 EP09720587A EP09720587A EP2250366A1 EP 2250366 A1 EP2250366 A1 EP 2250366A1 EP 09720587 A EP09720587 A EP 09720587A EP 09720587 A EP09720587 A EP 09720587A EP 2250366 A1 EP2250366 A1 EP 2250366A1
Authority
EP
European Patent Office
Prior art keywords
frequency
resonator
spark
module
value
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
EP09720587A
Other languages
German (de)
French (fr)
Other versions
EP2250366B1 (en
Inventor
Maxime Makarov
Frederic Auzas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP2250366A1 publication Critical patent/EP2250366A1/en
Application granted granted Critical
Publication of EP2250366B1 publication Critical patent/EP2250366B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
    • F02P9/007—Control of spark intensity, intensifying, lengthening, suppression by supplementary electrical discharge in the pre-ionised electrode interspace of the sparking plug, e.g. plasma jet ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P23/00—Other ignition
    • F02P23/04—Other physical ignition means, e.g. using laser rays

Definitions

  • the present invention generally relates to radiofrequency plasma spark plugs, intended to equip the combustion chambers of an internal combustion engine, for application to automotive ignition.
  • the invention relates more particularly to the operation of the radiofrequency high-voltage power supply of such a candle, based on the resonance phenomenon in an RLC circuit, the resonance frequency of which is determined by intrinsic parameter values of the candle.
  • FIG. 1 illustrates a plasma generating device.
  • This device is provided with a plasma generation resonator 30, representing a first subsystem of the radiofrequency candle, and comprising in series a resistor Ro, an inductance L 0 and a capacitance Co whose values are fixed during the realization by the geometry and the nature of the materials used, so that the resonator has a resonance frequency greater than 1 MHz.
  • a plasma generation resonator 30 representing a first subsystem of the radiofrequency candle, and comprising in series a resistor Ro, an inductance L 0 and a capacitance Co whose values are fixed during the realization by the geometry and the nature of the materials used, so that the resonator has a resonance frequency greater than 1 MHz.
  • the device is also provided with a radiofrequency power supply module 20, applying an excitation signal U in the form of a voltage at a reference frequency Fc on an output interface to which the plasma generation resonator 30 is connected. .
  • a control module 10 supplies the setpoint frequency Fc to the power supply module 20.
  • the excitation of a radiofrequency candle is not stationary, as shown in FIG. 2. Indeed, at the instant t 0, the module command sends a plasma generation command (ignition command) to the power supply module, adapted to trigger the excitation of the resonator. The excitation frequency is then close to the resonance frequency of the resonator. At the end of a transient period, at time t_d, the voltage at the output of the resonator becomes high enough for a spark to form.
  • the formation of the spark at the output of the resonator, occurring substantially at time t_d of the plasma generation control, represents a second subsystem 40 of the radiofrequency candle, the parameters of which modify the resonance conditions of the system as a whole.
  • a spark in a gas like any electrical conductor, is characterized by a capacitance C d , modeled in FIG. 1 at the output of the radiofrequency resonator 30.
  • the resonance frequency, specific to the sparkless resonator with a quality coefficient greater than 100 is greater than 1 MHz
  • the frequency of resonance of the system decreases by several tens of kHz given the additional capacity related to the presence of the spark at the output of the resonator, which is sufficient to cause a drop in the quality coefficient of the order of 25% and therefore , a significant decrease in the effectiveness of the radiofrequency candle.
  • a memory module in which are stored relations between the measurement signals of the operating parameters of the motor, the measurement signals of the operating parameters of the radio frequency supply and the optimum excitation frequency of the resonator.
  • Such an embodiment is however quite complex and, consequently, expensive to implement. Moreover, it does not make it possible to optimize the real-time radiofrequency power supply regime, since the measurements of operating parameters of a combustion engine are slow and provide only average information over several cycles and all the cylinders.
  • the reception of this request is made during a phase of optimizing the excitation frequency of the resonator during which the radiofrequency power supply is configured to apply on its output interface a voltage at a set frequency, which is unfit. to allow the generation of plasma of the resonator.
  • the radiofrequency power supply is configured to apply on its output interface a voltage at a set frequency, which is unfit. to allow the generation of plasma of the resonator.
  • such a system allows to perfectly preset the power supply to the resonance frequency specific to the spark-free spark plug, but on the other hand, does not allow to take into account the triggering of the spark, which, as we saw , modifies the resonance conditions to the detriment of the efficiency of the candle.
  • This solution therefore involves modifying the voltage at the output of the resonator. Indeed, when receiving a request for determining an optimum excitation frequency, the power supply module applies on the output interface a voltage that does not allow the resonator to generate a plasma. Then, once this optimal frequency is determined, the power module applies on its output interface a voltage at this optimum frequency, during an operating phase of the plasma generating device, during which a plasma must be generated. Also, this embodiment requires the implantation of a probe HT at the output of the resonator, which poses a serious technical problem in the case of a car candle.
  • the invention aims to solve one or more of these disadvantages.
  • the invention thus proposes a radiofrequency plasma generation device, comprising a power supply module applying on an output interface an excitation signal at a reference frequency, adapted to allow the formation of a spark at the output of a resonator.
  • plasma generator connected to the output interface of the power supply module, and a control module supplying the reference frequency to the power supply module during a radio frequency plasma generation control, said device being characterized in that the control module comprises means for determining an optimum excitation frequency, suitable for adapting the reference frequency to the resonance conditions of the device after formation of the spark.
  • the determination means are adapted to set the reference frequency to a value lower than the resonance frequency of the sparkless resonator.
  • the difference between said fixed value and the resonant frequency of the spark-free resonator is in a range between 0 and 100 kHz.
  • the determination means are adapted to modulate the reference frequency during the duration of the plasma generation control.
  • the determination means are adapted to successively set the reference frequency to a first value of the order of magnitude of the resonance frequency of the sparkless resonator, at the moment of the triggering of the plasma generation control and to a second value decreased by a predetermined frequency step with respect to said first value, substantially at the moment of spark formation.
  • the determination means are adapted to control a decrease in the reference frequency from a first fixed value, according to a frequency step adjustable in real time, from the moment of the formation of the spark.
  • the first fixed value is of the order of magnitude of the resonance frequency of the sparkless resonator.
  • the device comprises an electrical measurement module of the supply of the resonator connected to the control module, the means of determination determining the value of the frequency step according to received electrical measurements.
  • the electrical measurement module of the resonator supply is adapted to measure the relative amplitude of the current at the input of the resonator.
  • FIG. 1 schematically illustrates a device for generating known radio frequency plasma
  • FIG. 2 illustrates the current response of the plasma generation resonator as a function of time during a plasma generation control
  • FIG. 3 illustrates an embodiment of a plasma generating device according to the invention.
  • the invention proposes to adapt in real time the frequency of the excitation signal supplied by the power supply module to the radiofrequency resonator during a plasma generation control, in order to maintain the maximum quality factor of the resonator, including after the triggering the spark.
  • control module of the plasma generating device integrates means for determining an optimum excitation frequency, adapted to adapt the reference frequency Fc the resonance conditions of the device after formation of the spark.
  • the reference frequency is set to a value lower than the resonance frequency of the sparkless resonator.
  • the radiofrequency supply module of the resonator is set beforehand at a frequency lower than the resonance frequency of the sparkless resonator in order to excite the resonator. Knowing that during the formation of the spark, the natural frequency of the device as a whole typically decreases by several tens of kHz, the control module fixes for example the reference frequency to a value in a range between 0 and 100 kHz below the resonance frequency specific to the spark-free resonator.
  • the device is naturally in optimal operating conditions taking into account the formation of the spark and the quality factor reaches its maximum.
  • this solution is a passive solution, which requires no additional means of measurement or specific control device to integrate.
  • this solution does not guarantee a perfect optimization of the resonant frequency of the device.
  • another embodiment is not to set once and for all the set frequency before sending the plasma generation command to a value optimized to take into account the resonance conditions after formation of the spark as it has just been seen, but on the contrary, to modulate the reference frequency during the duration of the control of plasma generation.
  • the means for determining the control module are adapted to successively set the reference frequency Fc to a first value of the order of magnitude of the resonance frequency of the spark-free resonator, at the moment t_0 of the triggering of the control of plasma generation, and at a second value decreased by the predetermined frequency step with respect to this first value, substantially at the instant td of the formation of the spark.
  • the reference frequency of a value of 50 kHz is reduced with respect to an initial value corresponding to the value of the resonance frequency of the sparkless resonator, at the instant t_d of the plasma generation control.
  • a variant provides for optimizing in real time the adaptation of the excitation frequency during the plasma generation control, taking into account the random variation of the parameters of the real spark. More precisely, the means for determining the control module are then adapted to control the decrease of the reference frequency at the time of the formation of the spark, according to a frequency step that is not previously fixed, but on the contrary adjustable in real time. depending on the parameters of the actual spark.
  • the device comprises, with reference to FIG. 3, a module 50 for electrical measurement of the resonator power supply, connected to the control module 10.
  • the control module detects an electrical measurement representative of the formation of the spark (via a reception interface not shown) and determines then an optimal excitation frequency according to these electrical measurements, adapted to the current resonance conditions with a spark formed.
  • the electrical measurements make it possible, for example, to determine the adjustable frequency step of which it is necessary to reduce the reference frequency used as the frequency of control for the power supply module to optimize in real time the resonant system as a whole.
  • the electrical measurement module of the resonator supply is for example adapted to measure the relative amplitude of the current at the input of the resonator.
  • the amplitude of the current at the input of the resonator is checked and compared with the amplitude of the preceding alternation. If, at the end of the transient phase t_d where the spark is formed, there is a drop in the current (due to the formation of the spark), then the set frequency supplied to the power supply module of a no frequency determined in real time according to the measured current drop, so that the radio frequency supply of the resonator adapts in real time to the current resonant conditions of the device as a whole.
  • the device according to the invention therefore makes it possible to maintain the maximum quality factor of the radiofrequency candle, whatever the operating regime of its operation.
  • the proposed solution is easy to implement, inexpensive and allows to control the supplies of radio frequency candles in real time and cylinder by cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Plasma Technology (AREA)

Abstract

The invention relates to a device for generating a radiofrequency plasma, which comprises a supply module (20) applying, on an output interface, an excitation signal (U) at a setpoint frequency (Fc), adapted for generating a spark (40) at the output of a plasma-generation resonator (30) connected to the output interface of the power module, and a control module (10) supplying the setpoint frequency to the power module upon a command for generating the radiofrequency plasma, wherein said device is characterised in that the control module includes a means for determining an optimal excitation frequency, capable of adapting the setpoint frequency (Fc) to the resonance conditions of the device after formation of the spark.

Description

OPTIMISATION DE LA FREQUENCE D'EXCITATION D'UNE BOUGIE OPTIMIZATION OF THE FREQUENCY OF EXCITATION OF A CANDLE
RADIOFREQUENCERADIO FREQUENCY
La présente invention concerne, de façon générale, les bougies à plasma radiofréquence, destinées à équiper les chambres de combustion d'un moteur à combustion interne, pour une application à un allumage automobile. L' invention concerne plus particulièrement le fonctionnement de l'alimentation haute tension radiofréquence d'une telle bougie, basé sur le phénomène de résonance dans un circuit RLC, dont la fréquence de résonance est déterminée par des valeurs de paramètres intrinsèques de la bougie.The present invention generally relates to radiofrequency plasma spark plugs, intended to equip the combustion chambers of an internal combustion engine, for application to automotive ignition. The invention relates more particularly to the operation of the radiofrequency high-voltage power supply of such a candle, based on the resonance phenomenon in an RLC circuit, the resonance frequency of which is determined by intrinsic parameter values of the candle.
La figure 1 illustre un dispositif de génération de plasma. Ce dispositif est muni d'un résonateur 30 de génération de plasma, représentant un premier sous- système de la bougie radiofréquence, et comprenant en série une résistance Ro, une inductance L0 et une capacité Co, dont les valeurs sont figées lors de la réalisation par la géométrie et la nature des matériaux utilisés, de manière à ce que le résonateur présente une fréquence de résonance supérieure à 1 MHz.Figure 1 illustrates a plasma generating device. This device is provided with a plasma generation resonator 30, representing a first subsystem of the radiofrequency candle, and comprising in series a resistor Ro, an inductance L 0 and a capacitance Co whose values are fixed during the realization by the geometry and the nature of the materials used, so that the resonator has a resonance frequency greater than 1 MHz.
Le dispositif est également muni d'un module d'alimentation radiofréquence 20, appliquant un signal d'excitation U sous forme d'une tension à une fréquence de consigne Fc sur une interface de sortie à laquelle est connecté le résonateur 30 de génération de plasma. Un module de commande 10 fournit la fréquence de consigne Fc au module d'alimentation 20. En réalité, l'excitation d'une bougie radiofréquence n'est pas stationnaire, comme illustré à la figure 2. En effet, à l'instant t 0, le module de commande envoie une commande de génération de plasma (commande d'allumage) au module d'alimentation, adaptée à déclencher l'excitation du résonateur. La fréquence d'excitation est alors proche de la fréquence de résonance du résonateur. A la fin d'une période transitoire, à l'instant t_d, la tension à la sortie du résonateur devient suffisamment haute pour qu'une étincelle se forme.The device is also provided with a radiofrequency power supply module 20, applying an excitation signal U in the form of a voltage at a reference frequency Fc on an output interface to which the plasma generation resonator 30 is connected. . A control module 10 supplies the setpoint frequency Fc to the power supply module 20. In reality, the excitation of a radiofrequency candle is not stationary, as shown in FIG. 2. Indeed, at the instant t 0, the module command sends a plasma generation command (ignition command) to the power supply module, adapted to trigger the excitation of the resonator. The excitation frequency is then close to the resonance frequency of the resonator. At the end of a transient period, at time t_d, the voltage at the output of the resonator becomes high enough for a spark to form.
Or, la formation de l'étincelle à la sortie du résonateur, se produisant sensiblement au moment t_d de la commande de génération de plasma, représente un deuxième sous-système 40 de la bougie radiofréquence, dont les paramètres viennent modifier les conditions de résonance du système dans son entier. En effet, une étincelle dans un gaz, comme tout conducteur électrique, est caractérisée par une capacité Cd, modélisée à la figure 1 en sortie du résonateur radiofréquence 30. Ainsi, si sans étincelle, ce sont les seuls paramètres Ro, L0 et Co, propres au résonateur, qui déterminent la fréquence de résonance du système, ce n'est plus le cas lors de la formation d'une étincelle, les caractéristiques propres à cette dernière venant en effet modifier cette fréquence de résonance.However, the formation of the spark at the output of the resonator, occurring substantially at time t_d of the plasma generation control, represents a second subsystem 40 of the radiofrequency candle, the parameters of which modify the resonance conditions of the system as a whole. Indeed, a spark in a gas, like any electrical conductor, is characterized by a capacitance C d , modeled in FIG. 1 at the output of the radiofrequency resonator 30. Thus, if without spark, they are the only parameters Ro, L 0 and Co, specific to the resonator, which determine the resonant frequency of the system, this is no longer the case during the formation of a spark, the characteristics of the latter indeed changing this resonance frequency.
Cette différence entre la fréquence de résonance effective du résonateur avec une étincelle formée et la fréquence d'excitation du résonateur fixée par le module d'alimentation et réglée pour un système sans étincelle, entraîne alors une dégradation du facteur de qualité du résonateur (ou facteur de surtension, définissant le rapport entre l'amplitude de sa tension de sortie et sa tension d'entrée) . Ainsi, à titre d'exemple, dans un cas de figure où la fréquence de résonance, propre au résonateur sans étincelle de coefficient de qualité supérieur à 100, est supérieure à 1 MHz, lors de la production de l'étincelle, la fréquence de résonance du système diminue de plusieurs dizaines de kHz compte tenu de la capacité additionnelle liée à la présence de l'étincelle à la sortie du résonateur, ce qui est suffisant pour provoquer une chute du coefficient de qualité de l'ordre de 25% et donc, une baisse significative de l'efficacité de la bougie radiofréquence .This difference between the effective resonance frequency of the resonator with a spark formed and the excitation frequency of the resonator fixed by the power module and set for a sparkless system, then leads to a deterioration of the quality factor of the resonator (or factor overvoltage, defining the ratio between the amplitude of its output voltage and its input voltage). Thus, by way of example, in a case where the resonance frequency, specific to the sparkless resonator with a quality coefficient greater than 100, is greater than 1 MHz, during spark generation, the frequency of resonance of the system decreases by several tens of kHz given the additional capacity related to the presence of the spark at the output of the resonator, which is sufficient to cause a drop in the quality coefficient of the order of 25% and therefore , a significant decrease in the effectiveness of the radiofrequency candle.
Aussi, cette application à l'allumage automobile nécessite l'utilisation de résonateurs présentant un facteur de qualité élevé, dont la fréquence d'excitation reste toujours proche de la fréquence de résonance du système entier. Ainsi, il est important de maintenir un facteur de qualité maximal du résonateur bougie tout au long de son excitation, jusqu'à l'instant t_ext (figure 2), où le module de commande envoie une commande d'arrêt de l'alimentation radiofréquence du résonateur.Also, this application to automotive ignition requires the use of resonators with a high quality factor, whose excitation frequency is always close to the resonance frequency of the entire system. Thus, it is important to maintain a maximum quality factor of the candle resonator throughout its excitation, until time t_ext (Figure 2), where the control module sends a stop command of the radio frequency power supply. of the resonator.
Il est connu de la demande de brevet FR2895169, déposée au nom de la demanderesse, des moyens permettant d'optimiser la fréquence d'excitation du résonateur. Ces moyens consistent à intégrer à l'alimentation radiofréquence du résonateur : une interface de réception d'une requête en détermination d'une fréquence d'excitation optimale, c'est-à-dire sensiblement égale à la fréquence de résonance du résonateur, - une interface de réception de signaux de mesures de paramètres de fonctionnement d'un moteur à combustion, tels que la température d'huile moteur, le couple moteur, le régime moteur, l'angle d'allumage, etc.It is known from the patent application FR2895169, filed in the name of the applicant, means for optimizing the excitation frequency of the resonator. These means consist in integrating into the radio frequency supply of the resonator: an interface for receiving a request for determining an optimum excitation frequency, that is to say substantially equal to the resonance frequency of the resonator, an interface for receiving signals for measuring operating parameters of a combustion engine, such as engine oil temperature, engine torque, engine speed, ignition angle, etc.
- une interface de réception de signaux de mesure de paramètres de fonctionnement de l'alimentation radiofréquence, par exemple la tension à la sortie du résonateur, etan interface for receiving signals for measuring operating parameters of the radiofrequency power supply, for example the voltage at the output of the resonator, and
- un module mémoire dans lequel sont stockées des relations entre les signaux de mesure de paramètres de fonctionnement du moteur, les signaux de mesure de paramètres de fonctionnement de l'alimentation radiofréquence et la fréquence optimale d'excitation du résonateur .a memory module in which are stored relations between the measurement signals of the operating parameters of the motor, the measurement signals of the operating parameters of the radio frequency supply and the optimum excitation frequency of the resonator.
Une telle réalisation est cependant assez complexe et, en conséquence, onéreuse à mettre en œuvre. De plus, elle ne permet pas d'optimiser le régime d'alimentation radiofréquence en temps réel, dans la mesure où les mesures de paramètres de fonctionnement d'un moteur à combustion sont lentes et ne fournissent que des informations moyennes sur plusieurs cycles et tous les cylindres.Such an embodiment is however quite complex and, consequently, expensive to implement. Moreover, it does not make it possible to optimize the real-time radiofrequency power supply regime, since the measurements of operating parameters of a combustion engine are slow and provide only average information over several cycles and all the cylinders.
En outre, la réception de cette requête est effectuée durant une phase d'optimisation de la fréquence d'excitation du résonateur au cours de laquelle l'alimentation radiofréquence est configurée pour appliquer sur son interface de sortie une tension à une fréquence de consigne, inapte à permettre la génération de plasma du résonateur. Autrement dit, un tel système permet de prérégler parfaitement l'alimentation à la fréquence de résonance propre à la bougie sans étincelle, mais en revanche, ne permet pas de tenir compte du déclenchement de l'étincelle, qui, comme on l'a vu, modifie les conditions de résonance au détriment de l'efficacité de la bougie.In addition, the reception of this request is made during a phase of optimizing the excitation frequency of the resonator during which the radiofrequency power supply is configured to apply on its output interface a voltage at a set frequency, which is unfit. to allow the generation of plasma of the resonator. In other words, such a system allows to perfectly preset the power supply to the resonance frequency specific to the spark-free spark plug, but on the other hand, does not allow to take into account the triggering of the spark, which, as we saw , modifies the resonance conditions to the detriment of the efficiency of the candle.
Cette solution implique donc de modifier la tension à la sortie du résonateur. En effet, lors de la réception d'une requête de détermination d'une fréquence d'excitation optimale, le module d'alimentation applique sur l'interface de sortie une tension qui ne permet pas au résonateur de générer un plasma. Puis, une fois cette fréquence optimale déterminée, le module d'alimentation applique sur son interface de sortie une tension à cette fréquence optimale, lors d'une phase de fonctionnement du dispositif de génération de plasma, durant laquelle un plasma doit être généré. Aussi, ce mode de réalisation nécessite l'implantation d'une sonde HT à la sortie du résonateur, ce qui pose un sérieux problème technique dans le cas d'une bougie automobile.This solution therefore involves modifying the voltage at the output of the resonator. Indeed, when receiving a request for determining an optimum excitation frequency, the power supply module applies on the output interface a voltage that does not allow the resonator to generate a plasma. Then, once this optimal frequency is determined, the power module applies on its output interface a voltage at this optimum frequency, during an operating phase of the plasma generating device, during which a plasma must be generated. Also, this embodiment requires the implantation of a probe HT at the output of the resonator, which poses a serious technical problem in the case of a car candle.
L' invention vise à résoudre un ou plusieurs de ces inconvénients. L'invention propose ainsi dispositif de génération de plasma radiofréquence, comprenant un module d'alimentation appliquant sur une interface de sortie un signal d'excitation à une fréquence de consigne, adapté à permettre la formation d'une étincelle en sortie d'un résonateur de génération de plasma connecté à l'interface de sortie du module d'alimentation, et un module de commande, fournissant la fréquence de consigne au module d'alimentation lors d'une commande de génération de plasma radiofréquence, ledit dispositif étant caractérisé en ce que le module de commande comprend des moyens de détermination d'une fréquence d'excitation optimale, propres à adapter la fréquence de consigne aux conditions de résonance du dispositif après formation de 1' étincelle . Selon un mode de réalisation, les moyens de détermination sont adaptés à fixer la fréquence de consigne à une valeur inférieure à la fréquence de résonance du résonateur sans étincelle. De préférence, l'écart entre ladite valeur fixée et la fréquence de résonance du résonateur sans étincelle est situé dans une plage comprise entre 0 et 100 kHz.The invention aims to solve one or more of these disadvantages. The invention thus proposes a radiofrequency plasma generation device, comprising a power supply module applying on an output interface an excitation signal at a reference frequency, adapted to allow the formation of a spark at the output of a resonator. plasma generator connected to the output interface of the power supply module, and a control module supplying the reference frequency to the power supply module during a radio frequency plasma generation control, said device being characterized in that the control module comprises means for determining an optimum excitation frequency, suitable for adapting the reference frequency to the resonance conditions of the device after formation of the spark. According to one embodiment, the determination means are adapted to set the reference frequency to a value lower than the resonance frequency of the sparkless resonator. Preferably, the difference between said fixed value and the resonant frequency of the spark-free resonator is in a range between 0 and 100 kHz.
Selon un autre mode de réalisation, les moyens de détermination sont adaptés à moduler la fréquence de consigne pendant la durée de la commande de génération de plasma .According to another embodiment, the determination means are adapted to modulate the reference frequency during the duration of the plasma generation control.
Par exemple, les moyens de détermination sont adaptés à fixer successivement la fréquence de consigne à une première valeur de l'ordre de grandeur de la fréquence de résonance du résonateur sans étincelle, au moment du déclenchement de la commande de génération de plasma et à une seconde valeur diminuée d'un pas de fréquence prédéterminée par rapport à ladite première valeur, sensiblement au moment de la formation de l'étincelle.For example, the determination means are adapted to successively set the reference frequency to a first value of the order of magnitude of the resonance frequency of the sparkless resonator, at the moment of the triggering of the plasma generation control and to a second value decreased by a predetermined frequency step with respect to said first value, substantially at the moment of spark formation.
Selon une variante, les moyens de détermination sont adaptés à commander une diminution de la fréquence de consigne depuis une première valeur fixée, selon un pas de fréquence réglable en temps réel, à partir du moment de la formation de l'étincelle.According to a variant, the determination means are adapted to control a decrease in the reference frequency from a first fixed value, according to a frequency step adjustable in real time, from the moment of the formation of the spark.
Avantageusement, la première valeur fixée est de l'ordre de grandeur de la fréquence de résonance du résonateur sans étincelle.Advantageously, the first fixed value is of the order of magnitude of the resonance frequency of the sparkless resonator.
Avantageusement, le dispositif comprend un module de mesure électrique de l'alimentation du résonateur connecté au module de commande, les moyens de détermination déterminant la valeur du pas de fréquence en fonction de mesures électriques reçues.Advantageously, the device comprises an electrical measurement module of the supply of the resonator connected to the control module, the means of determination determining the value of the frequency step according to received electrical measurements.
De préférence, le module de mesure électrique de l'alimentation du résonateur est adapté à mesure l'amplitude relative du courant à l'entrée du résonateur.Preferably, the electrical measurement module of the resonator supply is adapted to measure the relative amplitude of the current at the input of the resonator.
L' invention concerne également un système d'allumage d'un moteur à combustion interne, caractérisé en ce qu' il comprend au moins un dispositif de génération de plasma tel qu'il vient d'être décrit. D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels : - la figure 1 illustre schématiquement un dispositif de génération de plasma radiofréquence connu ; - la figure 2 illustre la réponse en courant du résonateur de génération de plasma en fonction du temps lors d'une commande de génération de plasma ; - la figure 3 illustre un mode de réalisation d'un dispositif de génération de plasma selon l'invention.The invention also relates to an ignition system of an internal combustion engine, characterized in that it comprises at least one plasma generating device as just described. Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limiting, with reference to the appended drawings, in which: FIG. 1 schematically illustrates a device for generating known radio frequency plasma; FIG. 2 illustrates the current response of the plasma generation resonator as a function of time during a plasma generation control; FIG. 3 illustrates an embodiment of a plasma generating device according to the invention.
L'invention propose d'adapter en temps réel la fréquence du signal d'excitation fourni par le module d'alimentation au résonateur radiofréquence pendant une commande de génération de plasma, afin de maintenir le facteur de qualité maximal du résonateur, y compris après le déclenchement de l'étincelle.The invention proposes to adapt in real time the frequency of the excitation signal supplied by the power supply module to the radiofrequency resonator during a plasma generation control, in order to maintain the maximum quality factor of the resonator, including after the triggering the spark.
Pour ce faire, le module de commande du dispositif de génération de plasma selon l'invention intègre des moyens de détermination d'une fréquence d'excitation optimale, propres à adapter la fréquence de consigne Fc aux conditions de résonance du dispositif après formation de l'étincelle.To do this, the control module of the plasma generating device according to the invention integrates means for determining an optimum excitation frequency, adapted to adapt the reference frequency Fc the resonance conditions of the device after formation of the spark.
Selon un premier mode de réalisation, afin de maintenir le facteur de qualité maximal après le déclenchement de l'étincelle, la fréquence de consigne est fixée à une valeur inférieure à la fréquence de résonance du résonateur sans étincelle. On choisit donc, selon ce mode de réalisation, de régler préalablement le module d'alimentation radiofréquence du résonateur à une fréquence plus faible que la fréquence de résonance du résonateur sans étincelle pour exciter ce dernier. Sachant que lors de la formation de l'étincelle, la fréquence propre du dispositif dans son ensemble diminue typiquement de plusieurs dizaines de kHz, le module de commande fixe par exemple la fréquence de consigne à une valeur située dans une plage comprise entre 0 et 100 kHz sous la fréquence de résonance propre au résonateur sans étincelle .According to a first embodiment, in order to maintain the maximum quality factor after the spark has been triggered, the reference frequency is set to a value lower than the resonance frequency of the sparkless resonator. Thus, according to this embodiment, the radiofrequency supply module of the resonator is set beforehand at a frequency lower than the resonance frequency of the sparkless resonator in order to excite the resonator. Knowing that during the formation of the spark, the natural frequency of the device as a whole typically decreases by several tens of kHz, the control module fixes for example the reference frequency to a value in a range between 0 and 100 kHz below the resonance frequency specific to the spark-free resonator.
Ainsi, une fois que l'étincelle est formée, le dispositif se trouve naturellement dans les conditions optimales de fonctionnement tenant compte de la formation de l'étincelle et le facteur de qualité atteint son maximum.Thus, once the spark is formed, the device is naturally in optimal operating conditions taking into account the formation of the spark and the quality factor reaches its maximum.
Il s'agit là cependant d'une solution passive, qui ne nécessite aucun moyen de mesure supplémentaire, ni dispositif de contrôle spécifique à intégrer. En revanche, compte tenu la variation aléatoire des paramètres de l'étincelle réelle, qui influent directement sur les conditions de résonance du dispositif après formation de l'étincelle, cette solution ne garantit pas une optimisation parfaite de la fréquence de résonance du dispositif. Aussi, un autre mode de réalisation consiste non pas à fixer une fois pour toute la fréquence de consigne préalablement à l'envoi de la commande de génération de plasma à une valeur optimisée pour tenir compte des conditions de résonance après formation de l'étincelle comme il vient d'être vu, mais au contraire, à moduler la fréquence de consigne pendant la durée de la commande de génération de plasma.However, this is a passive solution, which requires no additional means of measurement or specific control device to integrate. On the other hand, given the random variation of the parameters of the actual spark, which directly affect the resonance conditions of the device after formation of the spark, this solution does not guarantee a perfect optimization of the resonant frequency of the device. Also, another embodiment is not to set once and for all the set frequency before sending the plasma generation command to a value optimized to take into account the resonance conditions after formation of the spark as it has just been seen, but on the contrary, to modulate the reference frequency during the duration of the control of plasma generation.
Selon ce mode de réalisation, on prévoit de commander le module d'alimentation, de manière à ce qu'il envoie un train d'excitation au résonateur radiofréquence dont la fréquence est prévue pour diminuer automatiquement avec le temps selon un pas de fréquence préalablement fixé. Plus précisément, les moyens de détermination du module de commande sont adaptés à fixer successivement la fréquence de consigne Fc à une première valeur de l'ordre de grandeur de la fréquence de résonance du résonateur sans étincelle, au moment t_0 du déclenchement de la commande de génération de plasma, et à une seconde valeur diminuée du pas de fréquence prédéterminée par rapport à cette première valeur, sensiblement au moment t d de la formation de l'étincelle.According to this embodiment, provision is made to control the power supply module, so that it sends an excitation train to the radio frequency resonator whose frequency is designed to decrease automatically with time according to a predetermined frequency step. . More specifically, the means for determining the control module are adapted to successively set the reference frequency Fc to a first value of the order of magnitude of the resonance frequency of the spark-free resonator, at the moment t_0 of the triggering of the control of plasma generation, and at a second value decreased by the predetermined frequency step with respect to this first value, substantially at the instant td of the formation of the spark.
On diminue par exemple la fréquence de consigne d'une valeur de 50 kHz par rapport à une valeur initiale correspondant à la valeur de la fréquence de résonance du résonateur sans étincelle, à l'instant t_d de la commande de génération de plasma.For example, the reference frequency of a value of 50 kHz is reduced with respect to an initial value corresponding to the value of the resonance frequency of the sparkless resonator, at the instant t_d of the plasma generation control.
Ainsi, on passe d'un système parfaitement accordé lors du déclenchement de la commande de génération de plasma, à un système "pas tout à fait" désaccordé au moment de la formation de l'étincelle, dans la mesure où on provoque une diminution de la fréquence d'excitation permettant de tenir compte de la formation de l'étincelle pour adapter la commande du résonateur aux nouvelles conditions de résonance, sans toutefois que cette diminution, dont la valeur est préalablement fixée, soit mise en corrélation avec les paramètres de l'étincelle réelle .Thus, we go from a perfectly tuned system when triggering the plasma generation control, to a system "not quite" detuned at the time of the formation of the spark, to the extent that a reduction in the excitation frequency is made to take into account the formation of the spark to adapt the resonator control to the new resonance conditions, without this reduction, the value of which is fixed beforehand, being correlated with the parameters of the actual spark.
Aussi, une variante prévoit d'optimiser en temps réel l'adaptation de la fréquence d'excitation pendant la commande de génération de plasma, compte tenu de la variation aléatoire des paramètres de l'étincelle réelle. Plus précisément, les moyens de détermination du module de commande sont alors adaptés à commander la diminution de la fréquence de consigne au moment de la formation de l'étincelle, selon un pas de fréquence non plus préalablement fixé, mais au contraire réglable en temps réel en fonction des paramètres de l'étincelle réelle.Also, a variant provides for optimizing in real time the adaptation of the excitation frequency during the plasma generation control, taking into account the random variation of the parameters of the real spark. More precisely, the means for determining the control module are then adapted to control the decrease of the reference frequency at the time of the formation of the spark, according to a frequency step that is not previously fixed, but on the contrary adjustable in real time. depending on the parameters of the actual spark.
Pour ce faire, le dispositif selon l'invention comprend, en référence à la figure 3, un module 50 de mesure électrique de l'alimentation du résonateur, connecté au module de commande 10.To do this, the device according to the invention comprises, with reference to FIG. 3, a module 50 for electrical measurement of the resonator power supply, connected to the control module 10.
Ainsi, pour une fréquence de consigne fournie, à la fin de la période transitoire t_d, le module de commande relève une mesure électrique représentative de la formation de l'étincelle (par l'intermédiaire d'une interface de réception non représentée) et détermine alors une fréquence d'excitation optimale en fonction de ces mesures électriques, adaptée aux conditions de résonance courantes avec une étincelle formée. Les mesures électriques permettent par exemple de déterminer le pas de fréquence réglable dont il convient de diminuer la fréquence de consigne utilisée comme fréquence de commande pour le module d'alimentation pour optimiser en temps réel le système résonant dans son entier.Thus, for a given setpoint frequency, at the end of the transient period t_d, the control module detects an electrical measurement representative of the formation of the spark (via a reception interface not shown) and determines then an optimal excitation frequency according to these electrical measurements, adapted to the current resonance conditions with a spark formed. The electrical measurements make it possible, for example, to determine the adjustable frequency step of which it is necessary to reduce the reference frequency used as the frequency of control for the power supply module to optimize in real time the resonant system as a whole.
Le module de mesure électrique de l'alimentation du résonateur est par exemple adapté à mesurer l'amplitude relative du courant à l'entrée du résonateur. Ainsi, à chaque alternance, on vérifie l'amplitude du courant à l'entrée du résonateur et on la compare avec l'amplitude de l'alternance précédente. Si, à la fin de la phase transitoire t_d où se forme l'étincelle, on constate une chute du courant (due à la formation de l'étincelle), on diminue alors la fréquence de consigne fournie au module d'alimentation d'un pas de fréquence déterminée en temps réel en fonction de la chute de courant mesurée, de manière que l'alimentation radiofréquence du résonateur s'adapte en temps réel aux conditions de résonance courantes du dispositif dans son entier .The electrical measurement module of the resonator supply is for example adapted to measure the relative amplitude of the current at the input of the resonator. Thus, at each alternation, the amplitude of the current at the input of the resonator is checked and compared with the amplitude of the preceding alternation. If, at the end of the transient phase t_d where the spark is formed, there is a drop in the current (due to the formation of the spark), then the set frequency supplied to the power supply module of a no frequency determined in real time according to the measured current drop, so that the radio frequency supply of the resonator adapts in real time to the current resonant conditions of the device as a whole.
Plusieurs algorithmes mathématiques d'optimisation des systèmes résonants existent et peuvent être utilisés à cet effet.Several mathematical algorithms for the optimization of resonant systems exist and can be used for this purpose.
Le dispositif selon l'invention permet donc de maintenir le facteur de qualité maximale de la bougie radiofréquence, quel que soit le régime de son fonctionnement. La solution proposée est facile à réaliser, peu coûteuse et permet de contrôler les alimentations des bougies radiofréquence en temps réel et cylindre par cylindre. The device according to the invention therefore makes it possible to maintain the maximum quality factor of the radiofrequency candle, whatever the operating regime of its operation. The proposed solution is easy to implement, inexpensive and allows to control the supplies of radio frequency candles in real time and cylinder by cylinder.

Claims

REVENDICATIONS
1. Dispositif de génération de plasma radiofréquence, comprenant un module d'alimentation (20) appliquant sur une interface de sortie un signal d'excitation (U) à une fréquence de consigne (Fc), adapté à permettre la formation d'une étincelle (40) en sortie d'un résonateur (30) de génération de plasma connecté à l'interface de sortie du module d'alimentation, et un module de commande (10), fournissant la fréquence de consigne au module d'alimentation lors d'une commande de génération de plasma radiofréquence, dans lequel le module de commande comprend des moyens propres à adapter la fréquence de consigne (Fc) aux conditions de résonance du dispositif après formation de l'étincelle, et adaptés à fixer la fréquence de consigne (Fc) à une valeur inférieure à la fréquence de résonance du résonateur sans étincelle, caractérisé en ce que le module de commande (10) est configuré pour commander le module d' alimentation, de manière à ce qu' il envoie un train d'excitation au résonateur radiofréquence dont la fréquence est prévue pour diminuer automatiquement avec le temps selon un pas de fréquence préalablement fixé. A radio frequency plasma generating device, comprising a power supply module (20) applying on an output interface an excitation signal (U) at a set frequency (Fc) adapted to allow the formation of a spark (40) at the output of a plasma generation resonator (30) connected to the output interface of the power supply module, and a control module (10) supplying the reference frequency to the power supply module when a radiofrequency plasma generation control, in which the control module comprises means suitable for adapting the reference frequency (Fc) to the resonance conditions of the device after formation of the spark, and adapted to set the reference frequency ( Fc) at a value lower than the resonant frequency of the sparkless resonator, characterized in that the control module (10) is configured to control the power supply module, so that it sends a signal. excitation of the radio frequency resonator whose frequency is expected to decrease automatically over time according to a previously fixed frequency step.
2. Dispositif selon la revendication 1, caractérisé en ce que l'écart entre ladite valeur fixée et la fréquence de résonance du résonateur sans étincelle est situé dans une plage comprise entre 0 et 100 kHz.2. Device according to claim 1, characterized in that the difference between said fixed value and the resonance frequency of the sparkless resonator is in a range between 0 and 100 kHz.
3. Dispositif selon la revendication 1, caractérisé en ce que les moyens propres à adapter la fréquence de consigne (Fc) sont adaptés à moduler la fréquence de consigne pendant la durée de la commande de génération de plasma.3. Device according to claim 1, characterized in that the means adapted to adjust the reference frequency (Fc) are adapted to modulate the setpoint frequency for the duration of the plasma generation command.
4. Dispositif selon la revendication 3, caractérisé en ce que les moyens propres à adapter la fréquence de consigne (Fc) sont adaptés à fixer successivement la fréquence de consigne (Fc) à une première valeur de l'ordre de grandeur de la fréquence de résonance du résonateur sans étincelle, au moment (t_0) du déclenchement de la commande de génération de plasma et à une seconde valeur diminuée d'un pas de fréquence prédéterminée par rapport à ladite première valeur, sensiblement au moment (t d) de la formation de 1' étincelle .4. Device according to claim 3, characterized in that the means adapted to adjust the reference frequency (Fc) are adapted to successively set the reference frequency (Fc) to a first value of the order of magnitude of the frequency of resonator resonance without spark, at the moment (t_0) of the triggering of the plasma generation control and at a second value decreased by a predetermined frequency step relative to said first value, substantially at the moment (td) of the formation of 1 spark.
5. Dispositif selon la revendication 3, caractérisé en ce que les moyens propres à adapter la fréquence de consigne (Fc) sont adaptés à commander une diminution de la fréquence de consigne depuis une première valeur fixée, selon un pas de fréquence réglable en temps réel, à partir du moment (t_d) de la formation de l'étincelle.5. Device according to claim 3, characterized in that the means adapted to adjust the reference frequency (Fc) are adapted to control a decrease in the set frequency from a first fixed value, according to a frequency step adjustable in real time. , from the moment (t_d) of the formation of the spark.
6. Dispositif selon la revendication 5, caractérisé en ce que la première valeur fixée est de l'ordre de grandeur de la fréquence de résonance du résonateur sans étincelle. 6. Device according to claim 5, characterized in that the first fixed value is of the order of magnitude of the resonance frequency of the sparkless resonator.
7. Dispositif selon la revendication 5 ou 6, caractérisé en ce qu'il comprend un module (50) de mesure électrique de l'alimentation du résonateur connecté au module de commande, les moyens de détermination déterminant la valeur du pas de fréquence en fonction de mesures électriques reçues.7. Device according to claim 5 or 6, characterized in that it comprises a module (50) for electrical measurement of the supply of the resonator connected to the control module, the determining means determining the value of the frequency step according to of electrical measurements received.
8. Dispositif selon la revendication 7, caractérisé en ce que le module de mesure électrique de l'alimentation du résonateur est adapté à mesurer l'amplitude relative du courant à l'entrée du résonateur. 8. Device according to claim 7, characterized in that the electrical measurement module of the power supply of the resonator is adapted to measure the relative amplitude of the current at the input of the resonator.
9. Système d'allumage d'un moteur à combustion interne, caractérisé en ce qu'il comprend au moins un dispositif de génération de plasma selon l'une quelconque des revendications 1 à 8. 9. Ignition system of an internal combustion engine, characterized in that it comprises at least one plasma generating device according to any one of claims 1 to 8.
EP09720587.6A 2008-02-28 2009-02-19 Optimisation of the excitation frequency of a radiofrequency plug Not-in-force EP2250366B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0851276A FR2928240B1 (en) 2008-02-28 2008-02-28 OPTIMIZATION OF THE FREQUENCY OF EXCITATION OF A RADIOFREQUENCY CANDLE.
PCT/FR2009/050264 WO2009112731A1 (en) 2008-02-28 2009-02-19 Optimisation of the excitation frequency of a radiofrequency plug

Publications (2)

Publication Number Publication Date
EP2250366A1 true EP2250366A1 (en) 2010-11-17
EP2250366B1 EP2250366B1 (en) 2013-07-10

Family

ID=39855029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09720587.6A Not-in-force EP2250366B1 (en) 2008-02-28 2009-02-19 Optimisation of the excitation frequency of a radiofrequency plug

Country Status (10)

Country Link
US (1) US8656880B2 (en)
EP (1) EP2250366B1 (en)
JP (1) JP2011513625A (en)
KR (1) KR101580223B1 (en)
CN (1) CN101981305B (en)
BR (1) BRPI0907782A2 (en)
FR (1) FR2928240B1 (en)
MX (1) MX2010009442A (en)
RU (1) RU2516295C2 (en)
WO (1) WO2009112731A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2934942B1 (en) * 2008-08-05 2010-09-10 Renault Sas CONTROL OF THE FREQUENCY OF EXCITATION OF A RADIOFREQUENCY CANDLE.
KR101922545B1 (en) * 2011-01-13 2018-11-27 페더럴-모굴 이그니션 컴퍼니 Corona ignition system having selective enhanced arc formation
JP5658729B2 (en) * 2012-11-29 2015-01-28 日本特殊陶業株式会社 Ignition system
US20140218005A1 (en) * 2013-02-06 2014-08-07 General Electric Company Anode depletion sensor hardware circuit
DE102013111062B4 (en) * 2013-10-07 2017-03-16 Borgwarner Ludwigsburg Gmbh Method for setting an excitation frequency of a resonant circuit of a corona ignition device
AU2015338676B2 (en) * 2014-10-30 2020-08-27 North-West University Ignition system for an internal combustion engine and a control method thereof
CN105003376B (en) * 2015-07-20 2017-04-26 英国Sunimex有限公司 Engine radio frequency ignition control method and device
US10424467B2 (en) * 2017-03-13 2019-09-24 Applied Materials, Inc. Smart RF pulsing tuning using variable frequency generators
WO2019092907A1 (en) * 2017-11-09 2019-05-16 三菱電機株式会社 Ignition device
CN109768702B (en) * 2018-12-27 2020-12-25 金国卫 A mould accuse circuit for looking for disinfection power supply resonant circuit resonant frequency point

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61210270A (en) * 1985-03-15 1986-09-18 Nippon Soken Inc Piezoelectric element driving device
FR2649759B1 (en) * 1989-07-13 1994-06-10 Siemens Bendix Automotive Elec IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE
RU2094646C1 (en) * 1994-02-10 1997-10-27 Научно-исследовательский институт машиностроения Главного управления ракетно-космической техники Комитета РФ по оборонным отраслям промышленности High-frequency electrically discharging ignition system
US5568801A (en) * 1994-05-20 1996-10-29 Ortech Corporation Plasma arc ignition system
US6334302B1 (en) * 1999-06-28 2002-01-01 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Variable specific impulse magnetoplasma rocket engine
CA2383209A1 (en) * 1999-09-15 2001-03-22 Matthias Wagner Ignition system for stratified fuel mixtures
DE102004058925A1 (en) * 2004-12-07 2006-06-08 Siemens Ag High-frequency plasma ignition device for internal combustion engines, in particular for directly injecting gasoline engines
CN1693699A (en) * 2005-06-16 2005-11-09 王刚毅 Microwave ignition system for improving combustion efficiency of internal combustion engine
DE102005036968A1 (en) * 2005-08-05 2007-02-15 Siemens Ag Plasma ignition system and method of operation
FR2895169B1 (en) * 2005-12-15 2008-08-01 Renault Sas OPTIMIZING THE EXCITATION FREQUENCY OF A RESONATOR
FR2895170B1 (en) 2005-12-15 2008-03-07 Renault Sas OPTIMIZING THE EXCITATION FREQUENCY OF A RESONATOR
FR2913297B1 (en) * 2007-03-01 2014-06-20 Renault Sas OPTIMIZING THE GENERATION OF A RADIO FREQUENCY IGNITION SPARK
JP5117202B2 (en) * 2008-01-24 2013-01-16 本田技研工業株式会社 engine
FR2934942B1 (en) 2008-08-05 2010-09-10 Renault Sas CONTROL OF THE FREQUENCY OF EXCITATION OF A RADIOFREQUENCY CANDLE.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009112731A1 *

Also Published As

Publication number Publication date
CN101981305B (en) 2013-03-27
RU2010139661A (en) 2012-04-10
WO2009112731A1 (en) 2009-09-17
KR101580223B1 (en) 2015-12-24
JP2011513625A (en) 2011-04-28
US8656880B2 (en) 2014-02-25
KR20110000642A (en) 2011-01-04
US20110048355A1 (en) 2011-03-03
EP2250366B1 (en) 2013-07-10
MX2010009442A (en) 2010-11-30
RU2516295C2 (en) 2014-05-20
CN101981305A (en) 2011-02-23
BRPI0907782A2 (en) 2016-06-07
FR2928240A1 (en) 2009-09-04
FR2928240B1 (en) 2016-10-28

Similar Documents

Publication Publication Date Title
EP2250366B1 (en) Optimisation of the excitation frequency of a radiofrequency plug
EP1961279B1 (en) Optimization of the excitation frequency of a resonator
EP2134959B1 (en) Optimum control of the resonant frequency of a resonator in a radio frequency ignition system
EP2315932B1 (en) Monitoring of the excitation frequency of a radiofrequency spark plug
EP2126341B1 (en) Optimised generation of a radio frequency ignition spark
EP2153056B1 (en) Measuring device in a radiofrequency ignition system for internal combustion engine
EP2115296B1 (en) Control of a plurality of plug coils via a single power stage
EP1019744B1 (en) Method for detecting a motor vehicle battery failure
EP2156160B1 (en) Diagnosis of the fouling condition of sparkplugs in a radiofrequency ignition system
FR2860301A1 (en) APPARATUS FOR MONITORING THE CONDITION OF AN AUTOMOTIVE BATTERY
EP2002117B1 (en) Method for measuring an ionization current of a spark plug of the type with resonant structure, and corresponding device
EP2321524B1 (en) Device for measuring the ionization current in a radiofrequency ignition system for an internal combustion engine
FR2467396A1 (en) CLICK SENSOR FOR AN INTERNAL COMBUSTION ENGINE
FR2736398A1 (en) IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
EP2173999B1 (en) Device for generating radiofrequency plasma
WO2006058970A1 (en) Method for assessing the state of charge of an electric battery
EP2240676A1 (en) Method for detecting electric power blips and managing the operation of a motor
FR2931206A1 (en) CONTROL METHOD FOR INJECTION ENGINE AND DEVICE FOR CARRYING OUT SAID METHOD
FR2904050A1 (en) PROCESS FOR THE AUTOMATIC DETERMINATION OF THE QUALITY OF A TRANSIENT COMPENSATION

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100825

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA RS

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20110803

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 621130

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130715

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602009017024

Country of ref document: DE

Effective date: 20130905

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 621130

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130710

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20130710

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131111

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130911

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131110

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131010

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131021

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131011

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20140411

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602009017024

Country of ref document: DE

Effective date: 20140411

BERE Be: lapsed

Owner name: RENAULT S.A.S.

Effective date: 20140228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140219

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140228

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140228

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140219

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20090219

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20180216

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130710

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190219

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20220217

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20220218

Year of fee payment: 14

Ref country code: FR

Payment date: 20220216

Year of fee payment: 14

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602009017024

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230219

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230228

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230901