EP1469197A1 - Procédé de contrôle du courant primaire d'allumage d'un moteur à combustion interne à allumage commandé - Google Patents
Procédé de contrôle du courant primaire d'allumage d'un moteur à combustion interne à allumage commandé Download PDFInfo
- Publication number
- EP1469197A1 EP1469197A1 EP04008309A EP04008309A EP1469197A1 EP 1469197 A1 EP1469197 A1 EP 1469197A1 EP 04008309 A EP04008309 A EP 04008309A EP 04008309 A EP04008309 A EP 04008309A EP 1469197 A1 EP1469197 A1 EP 1469197A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intensity
- current
- conduction time
- measurement
- ignition
- 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
- 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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/045—Layout of circuits for control of the dwell or anti dwell time
- F02P3/0453—Opening or closing the primary coil circuit with semiconductor devices
- F02P3/0456—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
-
- 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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
- F02P3/051—Opening or closing the primary coil circuit with semiconductor devices
-
- 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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/055—Layout of circuits with protective means to prevent damage to the circuit, e.g. semiconductor devices or the ignition coil
- F02P3/0552—Opening or closing the primary coil circuit with semiconductor devices
- F02P3/0554—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
Definitions
- the present invention relates to a method for controlling the primary current ignition in an internal combustion engine with positive ignition.
- a fuel / oxidizer mixture is ignited using a spark to cause a motor explosion.
- the spark is produced by a candle.
- the latter has two electrodes between which an electric arc is caused to achieve the spark. There is a potential difference between the electrodes large enough to be able to create an arc but a current must also flow between the electrodes to bring enough energy to the fuel / oxidizer mixture and the fire.
- the large potential difference across the spark plug electrodes is obtained by creating a current break in a circuit comprising a primary winding, and by amplifying the resulting overvoltage in a secondary winding.
- a current is circulated in the primary circuit for a determined time, called dwell time and also conduction time.
- dwell time a determined time
- conduction time a determined time
- a length classic is around 3 to 4 milliseconds.
- the intensity of the current in the circuit primary gradually increases throughout the dwell time. It's important to perfectly master the value of the current at the time of the circuit break. Indeed, if this intensity is too low, the energy delivered to the candle is not sufficient to ignite the fuel / oxidizer mixture. If on the contrary this intensity is too important, thermal problems appear at the level of the coil.
- the object of the present invention is therefore to provide a method making it possible to control the intensity in the primary circuit at least as reliable but without requiring the setting up of a calibration as is the case for the process described in the document supra.
- the implementation of the method according to the invention does not require additional cost in the ignition circuit.
- Conduction time correction can be performed for the cycle ignition during which the last intensity measurement was made but it can also be performed in a subsequent cycle.
- the conduction time predetermined is obtained for example from tables stored in a device for management and control of the ignition coil according to parameters such as in particular the potential difference applied to the terminals of the primary circuit.
- estimating the current at the end of the predetermined conduction time is obtained from an extrapolation measurement linear.
- Such an extrapolation is easily achievable and in the present case gives very good results.
- the control method according to the invention proposes that the estimation of the current at the end of the conduction time predetermined is carried out by linear extrapolation of the measurement carried out by carrying out an average with previous measurements. In this case, an average sliding of the estimated final current intensity is for example performed.
- the correction of the time of conduction is preferably carried out linearly as a function of the intensity of the current final, averaged or not.
- the control method according to the invention makes it possible to provide that the intensity of the desired final current is determined according to the engine speed corresponding.
- the predetermined conduction time when calculated at from tables, then also depends on the speed of the corresponding engine.
- FIG. 1 schematically shows an ignition device for a internal combustion engine with positive ignition.
- This coil has a primary winding 2 called also commonly “primary” and a secondary winding 4 commonly called “secondary”. These two windings cooperate with each other so as to form a transformer 6 voltage booster.
- the primary winding 2 is supplied by a voltage source 8 which is usually the corresponding vehicle battery.
- a switch 10 which presents itself here in the form of a transistor controls the power supply of the winding primary 2.
- the secondary winding 4 has a common terminal with the primary winding 2.
- the other terminal of the secondary winding 4 is connected to a electrode of a spark plug 12, the other electrode of this spark plug being connected to the mass 14.
- This management and control device 16 is connected to a central unit managing the engine and from which it can receive information such as for example the speed N of the corresponding engine.
- This command and management device 16 receives also information on the primary circuit of the ignition coil. So, he knows the potential difference V provided by the voltage source 8 and the intensity I of the current flowing in this primary circuit.
- An analog / digital converter 18 (or CAN) makes it possible to measure the intensity of the current I.
- This converter 18 actually measures a potential difference across a known resistor 20.
- a microcontroller integrated into the converter 18 manages the acquisitions made by the latter. So when a measurement is performed, we know precisely the date on which this measurement is performed. We can thus locate this measurement in relation to the closing of the switch 10 that is to say with respect to the start of the establishment of a current in the primary circuit.
- FIG. 2 presents a curve 22 showing the evolution of the intensity of the current I in the primary circuit as a function of time t.
- This curve 22 corresponds to a current curve generally observed in the primary circuit of an ignition coil.
- I i ,> I ref where I ref corresponds to the minimum value allowing ignition of the fuel / oxidizer mixture.
- the value I i should not exceed the value I ref too much so as not to risk damaging the coil.
- the value td i which corresponds to the dwell time for the ith ignition cycle, one acts directly on the value I i.
- the dwell time, or conduction time, of the ith cycle By increasing the dwell time, or conduction time, of the ith cycle, the value of the intensity is increased
- the present invention proposes to carry out a measurement of the intensity using the converter 18 at a date t i very close to td i .
- t i > 0.9 td i .
- the value td i is for example calculated by the command and management device 16 using a table stored therein and giving for each cycle a dwell time as a function of the voltage V at the terminals of the source voltage 8.
- the invention therefore proposes to calculate td cor i not only as a function of the measurement carried out during the ith cycle but also as a function of the measurements carried out during the (n-1) preceding cycles.
- the final intensity of the current is then estimated as a function of the final intensity estimated during the previous cycle and the value of the final intensity estimated during the current cycle.
- td cor i we can use the formula indicated above but we can also, alternatively, proceed as follows.
- a correction coefficient k i is calculated as a function of the same correction coefficient k i-1 calculated during the previous cycle.
- k i k i-1 + [filter. (I aim i - If av i ) / I aim i ] where filter is a fixed coefficient stored in the command and management device 16.
- the method as described above therefore makes it simple and reliable. to obtain, at the time of opening of the primary circuit, a current whose characteristics allow to have sufficient energy at the level of the corresponding candle 12 without create a thermal problem with the ignition coil.
- the invention proposes to vary the intensity I targeted as a function of the engine speed.
- the value of the dwell time predetermined by the command and management device is also varied. This value, predetermined by the command and management device 16, then depends both on the voltage V across the terminals of the voltage source 8 and on the engine speed N.
- the method according to the invention has the advantage of being very simple while being very precise.
- the only calibrations to be envisaged during the implementation of this process are the establishment of tables giving the value of the intensity I targeted as a function of the voltage prevailing at the terminals of the voltage source supplying the primary circuit and possibly also of the engine speed. It therefore suffices to produce a dwell table like that which is usually produced for any electronic ignition system.
- the measurement (s) is (are) used to modify the conduction time of the ignition cycle during which the measurement is carried out.
- the corrected measured value for the determination of the conduction time of the next cycle.
- a converter measuring the intensity of the current as close as possible to the end of the dwell time.
- the measurement then carried out is compared to the intensity I targeted and the dwell time of the following cycle is calculated as a function of the measurement carried out.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
- prédétermination du temps de conduction,
- réalisation d'au moins une mesure de l'intensité du courant dans le circuit primaire à une date comprise dans le dernier dixième du temps de conduction prédéterminé,
- estimation de l'intensité du courant à la fin du temps de conduction prédéterminé en fonction de la (des) mesure(s) réalisée(s),
- correction éventuelle du temps de conduction pour le cycle d'allumage au cours duquel la dernière mesure d'intensité a été réalisée en fonction de l'estimation précédente et de l'intensité de courant souhaitée en fin de temps de conduction.
Ifmoy i-1 est la valeur de l'intensité du courant estimée en fin de cycle lors du cycle précédent.
Claims (7)
- Procédé de commande d'un courant primaire dans une bobine d'allumage d'un moteur à combustion interne à allumage commandé, dans lequel le courant est établi dans un circuit primaire inductif pendant une durée donnée, appelée temps de conduction, et déterminée par le calcul et/ou en fonction de mesures réalisées dans le circuit primaire,
caractérisé en ce que le temps de conduction est calculé selon les étapes suivantes :prédétermination du temps de conduction (td i) prédéterminé,réalisation d'au moins une mesure de l'intensité (Ic i) du courant dans le circuit primaire à une date (t ,) comprise dans le dernier dixième du temps de conduction prédéterminé (td i),estimation de l'intensité du courant (If i ) à la fin du temps de conduction (td i) prédéterminé en fonction de la (des) mesure(s) réalisée(s),correction éventuelle du temps de conduction (td i) pour le cycle d'allumage au cours duquel la dernière mesure d'intensité a été réalisée en fonction de l'estimation précédente et de l'intensité de courant souhaitée (Ivisée i) en fin de temps de conduction. - Procédé de commande selon la revendication 1, caractérisé en ce que le temps de conduction prédéterminé (td i) est obtenu à partir de tables mémorisées dans un dispositif de gestion et de commande (16) de la bobine d'allumage en fonction de paramètres tels notamment la différence de potentiel (V) appliquée aux bornes du circuit primaire.
- Procédé de commande selon l'une des revendications 1 ou 2, caractérisé en ce que l'estimation du courant (If i) à la fin du temps de conduction prédéterminé (td i) est réalisée à partir d'une mesure par extrapolation linéaire.
- Procédé de commande selon l'une des revendications 1 à 3, caractérisé en ce que l'estimation du courant (If i) à la fin du temps de conduction prédéterminé (td i) est réalisée par extrapolation linéaire de la mesure réalisée en réalisant une moyenne avec des mesures précédemment effectuées.
- Procédé de commande selon la revendication 4, caractérisé en ce qu'une moyenne glissante de l'intensité du courant final estimé est réalisée.
- Procédé de commande selon l'une des revendications 1 à 5, caractérisé en ce que la correction du temps de conduction est réalisée linéairement en fonction de l'intensité du courant final, moyennée ou non.
- Procédé de commande selon l'une des revendications 1 à 6, caractérisé en ce que l'intensité du courant final souhaitée (Ivisée i) est déterminée en fonction du régime (N) du moteur correspondant.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0304834 | 2003-04-17 | ||
FR0304834A FR2853941B1 (fr) | 2003-04-17 | 2003-04-17 | Procede de controle du courant primaire d'allumage d'un moteur a combustion interne a allumage commande |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1469197A1 true EP1469197A1 (fr) | 2004-10-20 |
EP1469197A8 EP1469197A8 (fr) | 2004-12-22 |
EP1469197B1 EP1469197B1 (fr) | 2007-01-24 |
Family
ID=32893384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04008309A Expired - Lifetime EP1469197B1 (fr) | 2003-04-17 | 2004-04-06 | Procédé de contrôle du courant primaire d'allumage d'un moteur à combustion interne à allumage commandé |
Country Status (4)
Country | Link |
---|---|
US (1) | US6883508B2 (fr) |
EP (1) | EP1469197B1 (fr) |
DE (1) | DE602004004433T2 (fr) |
FR (1) | FR2853941B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2885651A1 (fr) * | 2005-09-15 | 2006-11-17 | Siemens Vdo Automotive Sas | Procede de commande d'un courant primaire dans un circuit inductif |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2827916B1 (fr) * | 2001-07-25 | 2003-10-31 | Inst Francais Du Petrole | Procede pour controler les parametres d'allumage d'une bougie d'allumage pour moteur a combustion interne et dispositif d'allumage utilisant un tel procede |
EP1929150A1 (fr) * | 2005-09-21 | 2008-06-11 | Freescale Semiconductor, Inc. | Appareil de commande et procede de commande d'une bobine d'allumage |
DE102007044859A1 (de) | 2007-09-20 | 2009-04-09 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben einer Zündspule und Verfahren zum Herstellen einer solchen Vorrichtung |
US10995726B2 (en) | 2018-03-29 | 2021-05-04 | Woodward, Inc. | Current profile optimization |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0559540A1 (fr) * | 1992-03-03 | 1993-09-08 | Marelli Autronica | Dispositif d'allumage électronique à bobine pour moteur à allumage commandé |
EP0590181A1 (fr) * | 1992-09-29 | 1994-04-06 | Siemens Aktiengesellschaft | Méthode de détermination du temps de fermeture d'un circuit primaire d'un système d'allumage d'un moteur à combustion interne |
FR2820465A1 (fr) * | 2001-02-05 | 2002-08-09 | Siemens Automotive Sa | Procede et dispositif de commande d'une bobine d'allumage d'un melange air/carburant dans un moteur a combustion interne |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51114534A (en) * | 1975-04-02 | 1976-10-08 | Hitachi Ltd | Contactless ignition device |
JPS6053795B2 (ja) * | 1978-03-14 | 1985-11-27 | 株式会社デンソー | 内燃機関点火装置 |
EP0740073B1 (fr) * | 1995-04-28 | 2004-08-18 | Co.Ri.M.Me. Consorzio Per La Ricerca Sulla Microelettronica Nel Mezzogiorno | Circuit pour détecter une surtension dans un charge électrique |
DE19713981A1 (de) * | 1997-04-04 | 1998-10-15 | Siemens Ag | Vorrichtung zum Zuführen eines analogen und eines digitalen Signals zu einer Recheneinheit und Vorrichtung zur Regelung des Stromflusses durch einen Verbraucher |
AT409406B (de) * | 2000-10-16 | 2002-08-26 | Jenbacher Ag | Zündsystem mit einer zündspule |
-
2003
- 2003-04-17 FR FR0304834A patent/FR2853941B1/fr not_active Expired - Lifetime
-
2004
- 2004-03-25 US US10/808,290 patent/US6883508B2/en not_active Expired - Lifetime
- 2004-04-06 DE DE602004004433T patent/DE602004004433T2/de not_active Expired - Fee Related
- 2004-04-06 EP EP04008309A patent/EP1469197B1/fr not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0559540A1 (fr) * | 1992-03-03 | 1993-09-08 | Marelli Autronica | Dispositif d'allumage électronique à bobine pour moteur à allumage commandé |
EP0590181A1 (fr) * | 1992-09-29 | 1994-04-06 | Siemens Aktiengesellschaft | Méthode de détermination du temps de fermeture d'un circuit primaire d'un système d'allumage d'un moteur à combustion interne |
FR2820465A1 (fr) * | 2001-02-05 | 2002-08-09 | Siemens Automotive Sa | Procede et dispositif de commande d'une bobine d'allumage d'un melange air/carburant dans un moteur a combustion interne |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2885651A1 (fr) * | 2005-09-15 | 2006-11-17 | Siemens Vdo Automotive Sas | Procede de commande d'un courant primaire dans un circuit inductif |
Also Published As
Publication number | Publication date |
---|---|
EP1469197A8 (fr) | 2004-12-22 |
DE602004004433T2 (de) | 2007-06-06 |
US6883508B2 (en) | 2005-04-26 |
DE602004004433D1 (de) | 2007-03-15 |
FR2853941A1 (fr) | 2004-10-22 |
EP1469197B1 (fr) | 2007-01-24 |
US20040206344A1 (en) | 2004-10-21 |
FR2853941B1 (fr) | 2007-02-09 |
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