EP2496825A2 - Starting control device and method for a combustion engine - Google Patents

Starting control device and method for a combustion engine

Info

Publication number
EP2496825A2
EP2496825A2 EP10785486A EP10785486A EP2496825A2 EP 2496825 A2 EP2496825 A2 EP 2496825A2 EP 10785486 A EP10785486 A EP 10785486A EP 10785486 A EP10785486 A EP 10785486A EP 2496825 A2 EP2496825 A2 EP 2496825A2
Authority
EP
European Patent Office
Prior art keywords
engine
instantaneous
internal combustion
combustion engine
starting
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
EP10785486A
Other languages
German (de)
French (fr)
Other versions
EP2496825B1 (en
Inventor
Fabrice Grisi
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP2496825A2 publication Critical patent/EP2496825A2/en
Application granted granted Critical
Publication of EP2496825B1 publication Critical patent/EP2496825B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0848—Circuits or control means specially adapted for starting of engines with means for detecting successful engine start, e.g. to stop starter actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1012—Engine speed gradient
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
    • F02N2200/022—Engine speed

Definitions

  • the present invention relates to the starting of internal combustion engines.
  • the aim of the invention is to overcome the drawback of the state of the prior art by proposing a new method making it possible to reduce the energy consumption spent during the start-up operation and to reduce the demand on the electric machine used for the operation. start of the internal combustion engine.
  • the invention therefore relates to a method for starting an internal combustion engine in which the internal combustion engine is started to rotate with the aid of an electric machine, the drive is maintained to bring the said motor into a autonomous motor rotation state, characterized in that the training of the motor when the instantaneous engine speed exceeds a determined speed threshold and the instantaneous acceleration of said engine speed is greater than a predetermined acceleration threshold.
  • the crossing of the two conditions makes the detection of combustion more reliable.
  • the invention may include one or more of the following features:
  • the speed threshold is determined as a function of a duration of driving the motor by the electric machine from a predetermined reference curve.
  • the driving time has a time origin a start order of the internal combustion engine, so as to wedge the reference curve with respect to this start command.
  • the reference curve is an envelope curve of the instantaneous engine speed obtained for at least one start without combustion. This makes it possible to simply determine the speed threshold as a function of the training time.
  • the instantaneous acceleration threshold is between 10,000 and 20000 rpm / sec and preferably between 15000 and 20000 rpm / sec.
  • the invention also relates to a control apparatus for controlling a starting operation of an internal combustion engine by the implementation of a method according to the invention.
  • FIG. 1 illustrates in diagram form an internal combustion engine starting according to the method of the invention.
  • FIG. 2 shows an example with two successive starts, a first start without combustion and a second start with combustion
  • FIG. 3 shows the acceleration curve associated with the example illustrated in FIG. 2.
  • Figure 1 illustrates in the form of a diagram the time variation of the instantaneous engine speed N during an internal combustion engine start.
  • the invention is advantageously applied in the context of a restart of an internal combustion engine of motor vehicles equipped with an automatic on / off using an electric machine such as a starter. But it is also possible to use the invention for a first start.
  • the internal combustion engine comprises a crankshaft driven by an electric machine to drive the engine. Transmission of the forces of the electric machine to the crankshaft is preferably by a ring gear integral with the crankshaft and the starter engages in this ring. Next to the ring gear is positioned a speed sensor which thus provides information on the rotational speed or engine speed to an engine control member.
  • the electric machine has exclusively or function for particular purpose to start the internal combustion engine so that it can operate autonomously.
  • Such systems are sufficiently known to those skilled in the art according to the state of the art not to require a detailed description.
  • the detection of engine combustions is hampered by motor acyclisms. Indeed, the four-stroke cycle used in internal combustion engines for motor vehicles connects phases such as the compression phase where the instantaneous engine speed N decreases strongly and others such as relaxation phases where it increases rapidly. At the start of the start, the kinetic energy stored by the engine being low, instantaneous acceleration or deceleration are very important.
  • the reference 1 thus designates a curve of variation of the instantaneous engine speed N as a function of the driving time t
  • the reference 2 designates a reference curve or template defining a speed threshold S n determined as a function of the driving time t
  • the reference 3 designates a counter Ce for recording the total number of burns detected.
  • the jig 2 is an envelope curve of the instantaneous engine speed N obtained for at least one start without combustion.
  • envelope curve we mean a smoothed curve indicating the limit within which all or most of the instantaneous engine speeds N are measured during at least one drive by the electric machine, without combustion.
  • This reference curve 2 can be determined in advance by engine bench tests and stored in a control device such as an electronic control unit also called ECU, said ECU being able to control a start operation by setting implementation of the method of the invention.
  • the instant t 0 corresponds to the time origin of the driving time t of the motor by the electric machine.
  • the time origin t 0 of the driving time t corresponds to a starting order of the internal combustion engine.
  • the complete combustion counter C c is initialized to 0.
  • the template 2 is calibrated so as to have time origin time t 0 .
  • the electric machine or the starter starts to drive the engine in rotation and the instantaneous engine speed N increases.
  • the instantaneous engine speed N exceeds a threshold S n fixed by the jig 2, however the instantaneous acceleration A, in other words the derivative of the instantaneous engine speed N, not shown in this example illustrated in FIG. , is less than a predetermined acceleration threshold S a .
  • the second condition on the instantaneous acceleration A not being fulfilled, it is considered not to be in the presence of a complete combustion, the counter C c is not incremented and the motor drive by the starter is maintained.
  • the drive of the starter is stopped, by cutting for example its power supply from the first detected combustion, that is to say when the complete combustion counter Cc is equal to one.
  • the complete combustion counter Cc is equal to one.
  • Figures 2 and 3 show another example with two successive starts, a first start D em1 without combustion and a second start D em2 with combustion, so successful.
  • the curve 2 denotes the non-combustion speed gauge and the curve 1' designates the instantaneous engine speed.
  • the curve 4 presents the instantaneous acceleration A, corresponding.
  • the dashed circle zone 5 it is noted that, during the first combustions, the kinetic energy stored by the engine being low, the amplitude of the instantaneous acceleration A is important and an order of magnitude higher. at 10000 rpm / second.
  • the detection of the first combustion according to the method of the invention is made more reliable and the development is facilitated. Indeed, the detection threshold of instantaneous acceleration of the engine speed no longer needs to distinguish a real combustion of a simple detent and the template does not need to be determined with great precision, because if the regime instant engine is higher, it will be with low dynamics, so the condition on the instantaneous acceleration will not be met.
  • the method of the invention has the advantage of soliciting the electric starting machine as little as possible thus to preserve its life, and to reduce noise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention relates to a method for starting an internal combustion engine whereby: the internal combustion engine begins to be rotated using an electrical machine, and the rotation is maintained so as to move said engine into a self-contained drive rotation state. The method is characterized in that the rotation of the engine is stopped when the instantaneous engine speed (N) exceeds a predetermined speed threshold (Sn) and moreover in that the instantaneous acceleration (Ai) of said engine speed is greater than a predetermined acceleration threshold (Sa). The invention also relates to a control apparatus for implementing said method.

Description

Procédé de démarrage d'un moteur à combustion interne et appareil de commande mettant en œuvre ledit procédé  Method of starting an internal combustion engine and control apparatus implementing said method
Domaine technique de l'invention Technical field of the invention
La présente invention revendique la priorité de la demande française 0957788 déposée le 04 Novembre 2009 dont le contenu (texte, dessins et revendications) est ici incorporé par référence. The present invention claims the priority of the French application 0957788 filed on November 04, 2009 whose content (text, drawings and claims) is hereby incorporated by reference.
La présente invention concerne le démarrage des moteurs à combustion interne. The present invention relates to the starting of internal combustion engines.
Arrière-plan technologique Technological background
Il est connu, selon l'état de la technique, de mettre en mouvement les moteurs à combustion interne à l'aide d'une machine électrique, par exemple à l'aide d'un démarreur jusqu'à ce que les premières combustions se produisent d'elles-mêmes dans le moteur à combustion interne pour être accéléré jusqu'à la vitesse de rotation de ralenti.  It is known, according to the state of the art, to set the internal combustion engines in motion using an electric machine, for example using a starter until the first combustions occur. produce themselves in the internal combustion engine to be accelerated to idle speed.
Il est connu par exemple du document US20070245998 d'assister le démarrage jusqu'à ce que le moteur dépasse un seuil prédéterminé de vitesse de rotation, la désactivation du démarreur. Cependant ce type de démarrage a pour inconvénient de commander la désactivation du démarreur à un moment où les premières combustions se produisent déjà et entraine le démarreur. Le démarreur est donc activé plus que nécessaire, ce qui augmente ses sollicitations mécaniques et réduit sa durée de vie d'une part et dépense de l'énergie électrique inutilement d'autre part. Le problème est encore plus crucial pour les moteurs de véhicules automobiles équipés d'un automatisme marche/arrêt utilisant un démarreur. En effet le nombre de démarrage au cours de la vie du véhicule est augmenté. It is known, for example, from document US20070245998 to assist starting up until the motor exceeds a predetermined threshold of rotational speed, the deactivation of the starter. However, this type of start has the disadvantage of controlling the deactivation of the starter at a time when the first combustions already occur and drives the starter. The starter is therefore activated more than necessary, which increases its mechanical stresses and reduces its life on the one hand and spends unnecessary power on the other hand. The problem is even more crucial for motor vehicle engines equipped with an automatic start / stop using a starter. Indeed the number of starting during the life of the vehicle is increased.
L'invention a pour but de pallier l'inconvénient de l'état de l'art antérieur en proposant un nouveau procédé permettant de réduire la consommation d'énergie dépensée pendant l'opération de démarrage et de moins solliciter la machine électrique utilisée pour le démarrage du moteur à combustion interne. The aim of the invention is to overcome the drawback of the state of the prior art by proposing a new method making it possible to reduce the energy consumption spent during the start-up operation and to reduce the demand on the electric machine used for the operation. start of the internal combustion engine.
L'invention concerne donc un procédé de démarrage d'un moteur à combustion interne selon lequel on commence à entraîner le moteur à combustion interne en rotation à l'aide d'une machine électrique, on maintient l'entraînement pour amener ledit moteur dans un état de rotation moteur autonome, caractérisé en ce que l'on cesse l'entraînement du moteur quand le régime moteur instantané dépasse un seuil de régime déterminé et que l'accélération instantanée dudit régime moteur est supérieure à un seuil d'accélération prédéterminé. Le croisement des deux conditions rend la détection d'une combustion plus fiable. The invention therefore relates to a method for starting an internal combustion engine in which the internal combustion engine is started to rotate with the aid of an electric machine, the drive is maintained to bring the said motor into a autonomous motor rotation state, characterized in that the training of the motor when the instantaneous engine speed exceeds a determined speed threshold and the instantaneous acceleration of said engine speed is greater than a predetermined acceleration threshold. The crossing of the two conditions makes the detection of combustion more reliable.
Par ailleurs, l'invention peut comporter l'une ou plusieurs des caractéristiques suivantes : In addition, the invention may include one or more of the following features:
De préférence, le seuil de régime est déterminé en fonction d'une durée d'entraînement du moteur par la machine électrique à partir d'une courbe de référence prédéterminée. Preferably, the speed threshold is determined as a function of a duration of driving the motor by the electric machine from a predetermined reference curve.
Dans une variante, la durée d'entraînement a pour origine temporelle un ordre de démarrage du moteur à combustion interne, de façon à caler la courbe de référence par rapport à cet ordre de démarrage. De préférence, la courbe de référence est une courbe enveloppe du régime moteur instantané obtenue pour au moins un démarrage sans combustion. Ce qui permet de déterminer simplement le seuil de régime en fonction de la durée d'entraînement. In a variant, the driving time has a time origin a start order of the internal combustion engine, so as to wedge the reference curve with respect to this start command. Preferably, the reference curve is an envelope curve of the instantaneous engine speed obtained for at least one start without combustion. This makes it possible to simply determine the speed threshold as a function of the training time.
De préférence, le seuil d'accélération instantanée est compris entre 10000 et 20000 tr/min/sec et de préférence entre 15000 et 20000 tr/min/sec. Preferably, the instantaneous acceleration threshold is between 10,000 and 20000 rpm / sec and preferably between 15000 and 20000 rpm / sec.
Par ailleurs, l'invention a aussi pour objet un appareil de commande pour commander une opération de démarrage d'un moteur à combustion interne par la mise en œuvre d'un procédé selon l'invention. Furthermore, the invention also relates to a control apparatus for controlling a starting operation of an internal combustion engine by the implementation of a method according to the invention.
Brève description des dessins Brief description of the drawings
D'autres particularités et avantages apparaîtront à la lecture de la description ci-après d'un mode particulier de réalisation, non limitatif de l'invention, faite en référence aux figures dans lesquelles :  Other features and advantages will appear on reading the following description of a particular embodiment, not limiting of the invention, with reference to the figures in which:
-La figure 1 illustre sous forme de diagramme un démarrage moteur à combustion interne selon le procédé de l'invention. FIG. 1 illustrates in diagram form an internal combustion engine starting according to the method of the invention.
- La figure 2 présente un exemple avec deux démarrages successifs, un premier démarrage sans combustion et un second démarrage avec combustion,  FIG. 2 shows an example with two successive starts, a first start without combustion and a second start with combustion,
- La figure 3 présente la courbe d'accélération associée à l'exemple illustré en figure 2. Description détaillée FIG. 3 shows the acceleration curve associated with the example illustrated in FIG. 2. detailed description
La figure 1 illustre sous la forme d'un diagramme la variation temporelle du régime moteur instantané N lors d'un démarrage de moteur à combustion interne. L'invention s'applique avantageusement dans le cadre d'un redémarrage de moteur à combustion interne de véhicules automobiles équipés d'un automatisme marche/arrêt utilisant une machine électrique tel qu'un démarreur. Mais il est également possible d'utiliser l'invention pour un premier démarrage. Classiquement, le moteur à combustion interne comporte un vilebrequin entraîné par une machine électrique pour entraîner le moteur. La transmission des efforts de la machine électrique au vilebrequin se fait de préférence par une couronne dentée solidaire du vilebrequin et le démarreur engrène dans cette couronne. En regard de la couronne dentée est positionné un capteur de régime qui apporte ainsi une information sur la vitesse de rotation ou régime du moteur à un organe de contrôle moteur.  Figure 1 illustrates in the form of a diagram the time variation of the instantaneous engine speed N during an internal combustion engine start. The invention is advantageously applied in the context of a restart of an internal combustion engine of motor vehicles equipped with an automatic on / off using an electric machine such as a starter. But it is also possible to use the invention for a first start. Conventionally, the internal combustion engine comprises a crankshaft driven by an electric machine to drive the engine. Transmission of the forces of the electric machine to the crankshaft is preferably by a ring gear integral with the crankshaft and the starter engages in this ring. Next to the ring gear is positioned a speed sensor which thus provides information on the rotational speed or engine speed to an engine control member.
La machine électrique a exclusivement pour fonction ou notamment pour fonction de démarrer le moteur à combustion interne pour que celui-ci puisse fonctionner de manière autonome. De tels systèmes sont suffisamment connus de l'homme du métier selon l'état de la technique pour ne pas nécessiter une description détaillée. The electric machine has exclusively or function for particular purpose to start the internal combustion engine so that it can operate autonomously. Such systems are sufficiently known to those skilled in the art according to the state of the art not to require a detailed description.
La détection des combustions moteur est gênée par les acyclismes du moteur. En effet, le cycle à quatre temps utilisé dans les moteurs à combustion interne pour véhicules automobile enchaîne les phases telles que la phase de compression où le régime moteur instantané N diminue fortement et d'autres telles que des phases de détente où il augmente rapidement. Lors du début du démarrage, l'énergie cinétique emmagasinée par le moteur étant faible, les accélérations ou décélération instantanées sont très importantes. Sur la figure 1 , la référence 1 désigne donc une courbe de variation du régime moteur instantané N en fonction de la durée d'entraînement t, la référence 2 désigne une courbe de référence ou gabarit définissant un seuil de régime Sn déterminé en fonction de la durée d'entraînement t et la référence 3 désigne un compteur Ce pour enregistrer le nombre de combustion complète détectées. The detection of engine combustions is hampered by motor acyclisms. Indeed, the four-stroke cycle used in internal combustion engines for motor vehicles connects phases such as the compression phase where the instantaneous engine speed N decreases strongly and others such as relaxation phases where it increases rapidly. At the start of the start, the kinetic energy stored by the engine being low, instantaneous acceleration or deceleration are very important. In FIG. 1, the reference 1 thus designates a curve of variation of the instantaneous engine speed N as a function of the driving time t, the reference 2 designates a reference curve or template defining a speed threshold S n determined as a function of the driving time t and the reference 3 designates a counter Ce for recording the total number of burns detected.
De préférence, le gabarit 2 est une courbe enveloppe du régime moteur instantané N obtenue pour au moins un démarrage sans combustion. Par courbe enveloppe, on entend une courbe lissée indiquant la limite à l'intérieur de laquelle se placent la totalité ou la majorité des régimes moteur instantané N mesurés lors d'au moins un entraînement par la machine électrique, sans combustion. Cette courbe de référence 2 peut être déterminée au préalable par des essais sur banc moteur et mis en mémoire dans un appareil de commande tel qu'une unité de commande électronique encore nommée ECU, ledit ECU étant apte à commander une opération de démarrage par la mise en œuvre du procédé de l'invention. Preferably, the jig 2 is an envelope curve of the instantaneous engine speed N obtained for at least one start without combustion. By envelope curve, we mean a smoothed curve indicating the limit within which all or most of the instantaneous engine speeds N are measured during at least one drive by the electric machine, without combustion. This reference curve 2 can be determined in advance by engine bench tests and stored in a control device such as an electronic control unit also called ECU, said ECU being able to control a start operation by setting implementation of the method of the invention.
Sur la figure 1 , l'instant t0, correspond à l'origine temporelle de la durée d'entrainement t du moteur par la machine électrique. De préférence, l'origine temporelle t0 de la durée d'entrainement t correspond à un ordre de démarrage du moteur à combustion interne. A cet instant, le compteur de combustion complète Cc est initialisé à 0. Le gabarit 2 est calé de manière à avoir pour origine temporelle l'instant t0. A l'instant ti , la machine électrique ou le démarreur commence à entraîner le moteur en rotation et le régime moteur instantané N augmente. In FIG. 1, the instant t 0 corresponds to the time origin of the driving time t of the motor by the electric machine. Preferably, the time origin t 0 of the driving time t corresponds to a starting order of the internal combustion engine. At this time, the complete combustion counter C c is initialized to 0. The template 2 is calibrated so as to have time origin time t 0 . At the instant ti, the electric machine or the starter starts to drive the engine in rotation and the instantaneous engine speed N increases.
A l'instant t2, le régime moteur instantané N dépasse un seuil Sn fixé par le gabarit 2, cependant l'accélération instantanée A,, autrement dit la dérivée du régime moteur instantanée N, non représentée sur cet exemple illustré en figure 1 , est inférieure à un seuil d'accélération prédéterminé Sa. At the instant t 2 , the instantaneous engine speed N exceeds a threshold S n fixed by the jig 2, however the instantaneous acceleration A, in other words the derivative of the instantaneous engine speed N, not shown in this example illustrated in FIG. , is less than a predetermined acceleration threshold S a .
Conformément à l'invention, la seconde condition sur l'accélération instantanée A, n'étant pas remplie, on considère ne pas être en présence d'une combustion complète, le compteur Cc n'est pas incrémenté et l'entraînement du moteur par le démarreur est maintenu. According to the invention, the second condition on the instantaneous acceleration A, not being fulfilled, it is considered not to be in the presence of a complete combustion, the counter C c is not incremented and the motor drive by the starter is maintained.
Il en va de même, à l'instant t3, où, suite à une détente D, le régime instantané N dépasse le seuil Sn prédéterminé par le gabarit 2 sans que l'accélération instantanée A, soit supérieure au seuil d'accélération instantanée Sa. Ici encore, la seconde condition sur l'accélération instantanée A, n'étant pas remplie, on considère ne pas être en présence d'une combustion complète, le compteur Cc n'est pas incrémenté et l'entraînement du moteur par le démarreur est maintenu. A l'instant t4, en revanche les deux conditions sont remplies : le régime instantané N du moteur est supérieur au seuil de régime Sn déterminé par le gabarit 2 et l'accélération instantanée A, est supérieure au seuil d'accélération Sa prédéterminé. On considère donc être en présence d'une combustion complète et le compteur Cc est incrémenté comme le montre la courbe 3. It is the same at time t 3 , where, following an expansion D, the instantaneous speed N exceeds the threshold S n predetermined by the template 2 without the instantaneous acceleration A, being greater than the acceleration threshold. instant S a . Here again, the second condition on the instantaneous acceleration A, not being fulfilled, it is considered not to be in the presence of a complete combustion, the counter C c is not incremented and the motor drive by the starter is maintained. At the instant t 4 , however, the two conditions are fulfilled: the instantaneous speed N of the engine is greater than the speed threshold S n determined by the template 2 and the instantaneous acceleration A is greater than the acceleration threshold S a predetermined. We therefore consider be in the presence of complete combustion and the counter C c is incremented as shown in curve 3.
De préférence, on cesse l'entraînement du démarreur, en coupant par exemple son alimentation électrique dès la première combustion détectée, c'est-à-dire quand le compteur de combustion complète Cc est égal à un. En effet, on peut décider à ce moment de cesser l'entraînement du démarreur car à partir de cet instant t4 la rotation du moteur à combustion interne est désormais autonome, c'est-à-dire que le régime moteur est entretenu par les combustions. En procédant ainsi, on optimise la durée d'entraînement par le démarreur du moteur à combustion en coupant son entraînement au plus tôt, c'est-à-dire dans notre exemple dès la première combustion complète détectée soit pour une valeur de compteur Cc égale à 1 Preferably, the drive of the starter is stopped, by cutting for example its power supply from the first detected combustion, that is to say when the complete combustion counter Cc is equal to one. Indeed, one can decide at this time to stop the starter drive because from this time t 4 the rotation of the internal combustion engine is now autonomous, that is to say that the engine speed is maintained by the combustions. By doing so, it optimizes the drive time by the starter of the combustion engine by cutting off its drive at the earliest, that is to say in our example from the first complete combustion detected either for a counter value Cc equal at 1
Les figures 2 et 3 présentent un autre exemple avec deux démarrages successifs, un premier démarrage Dem1 sans combustion et un second démarrage Dem2 avec combustion, donc réussi. Sur la figure 2, la courbe 2' désigne le gabarit de régime sans combustion et la courbe 1 ' désigne le régime moteur instantané. Sur la figure 3, la courbe 4 présente l'accélération instantanée A, correspondante. Comme le souligne la zone cerclée en pointillé 5, on note que, lors des premières combustions, l'énergie cinétique emmagasinée par le moteur étant faible, l'amplitude de l'accélération instantanée A, est importante et d'un ordre de grandeur supérieur à 10000 tr/min/seconde. Figures 2 and 3 show another example with two successive starts, a first start D em1 without combustion and a second start D em2 with combustion, so successful. In FIG. 2, the curve 2 'denotes the non-combustion speed gauge and the curve 1' designates the instantaneous engine speed. In FIG. 3, the curve 4 presents the instantaneous acceleration A, corresponding. As highlighted by the dashed circle zone 5, it is noted that, during the first combustions, the kinetic energy stored by the engine being low, the amplitude of the instantaneous acceleration A is important and an order of magnitude higher. at 10000 rpm / second.
Ainsi, en choisissant avantageusement un seuil d'accélération instantané Sa compris entre 10000 et 20000 tr/min/s et de préférence entre 15000 et 20000 tr/min/s, on peut aisément discriminer les premières combustions. Thus, by advantageously choosing a S instantaneous acceleration threshold of between 10,000 and 20,000 rev / min / sec and preferably between 15,000 and 20,000 rev / min / sec, can be easily discriminate the first combustion.
La détection de la première combustion selon le procédé de l'invention est rendu plus fiable et la mise au point est facilitée. En effet, le seuil de détection d'accélération instantanée du régime moteur n'a plus besoin de distinguer une réelle combustion d'une simple détente et le gabarit n'a pas besoin d'être déterminé avec une grande précision, car si le régime moteur instantané est supérieur, ce sera avec une faible dynamique, donc la condition sur l'accélération instantanée ne sera pas remplie. The detection of the first combustion according to the method of the invention is made more reliable and the development is facilitated. Indeed, the detection threshold of instantaneous acceleration of the engine speed no longer needs to distinguish a real combustion of a simple detent and the template does not need to be determined with great precision, because if the regime instant engine is higher, it will be with low dynamics, so the condition on the instantaneous acceleration will not be met.
Le procédé de l'invention a pour avantage de solliciter la machine électrique de démarrage le moins possible donc de préserver sa durée de vie, et de diminuer les nuisances sonores. The method of the invention has the advantage of soliciting the electric starting machine as little as possible thus to preserve its life, and to reduce noise.

Claims

Revendications claims
1 . Procédé de démarrage d'un moteur à combustion interne selon lequel on commence à entraîner le moteur à combustion interne en rotation à l'aide d'une machine électrique, on maintient l'entraînement pour amener ledit moteur dans un état de rotation moteur autonome, caractérisé en ce que l'on cesse l'entraînement du moteur quand le régime moteur instantané (N) dépasse un seuil de régime (Sn) déterminé et que l'accélération instantanée (A,) dudit régime moteur est supérieure à un seuil d'accélération (Sa) prédéterminé. 1. A method of starting an internal combustion engine according to which the internal combustion engine is started to rotate with the aid of an electric machine, the drive is maintained to bring the said motor into a state of autonomous motor rotation, characterized in that the drive of the engine is stopped when the instantaneous engine speed (N) exceeds a determined speed threshold (S n ) and the instantaneous acceleration (A,) of said engine speed is greater than a threshold of predetermined acceleration (S a ).
2. Procédé de démarrage selon la revendication 1 , caractérisé en ce que le seuil de régime (Sn) est déterminé en fonction d'une durée d'entraînement (t) du moteur par la machine électrique à partir d'une courbe de référence (2 ; 2') prédéterminée. 2. Starting method according to claim 1, characterized in that the speed threshold (S n ) is determined as a function of a driving time (t) of the motor by the electric machine from a reference curve (2; 2 ') predetermined.
3. Procédé de démarrage selon la revendication 2, caractérisé en ce que la durée d'entraînement (t) a pour origine temporelle (t0) un ordre de démarrage du moteur à combustion interne. 3. Starting method according to claim 2, characterized in that the driving time (t) has for time origin (t 0 ) a starting order of the internal combustion engine.
4. Procédé de démarrage selon la revendication 2 ou la revendication 3, caractérisé en ce que la courbe de référence (2 ; 2') est une courbe enveloppe du régime moteur instantané (N) obtenue pour au moins un démarrage sans combustion. 4. Starting method according to claim 2 or claim 3, characterized in that the reference curve (2; 2 ') is an envelope curve of the instantaneous engine speed (N) obtained for at least one start without combustion.
5. Procédé de démarrage selon l'une quelconque des revendications précédentes, caractérisé en ce que le seuil d'accélération instantanée (Sa) est compris entre 10000 et 20000 tr/min/sec et de préférence entre 15000 et 20000 tr/min/sec. 5. Starting method according to any one of the preceding claims, characterized in that the instantaneous acceleration threshold (S a ) is between 10000 and 20000 rpm / sec and preferably between 15000 and 20000 rpm / dry.
6. Appareil de commande pour commander une opération de démarrage d'un moteur à combustion interne par la mise en œuvre d'un procédé selon l'une quelconque des revendications précédentes. A control apparatus for controlling a starting operation of an internal combustion engine by carrying out a method according to any one of the preceding claims.
EP10785486.1A 2009-11-04 2010-10-21 Starting control device and method for a combustion engine Active EP2496825B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0957788A FR2952129B1 (en) 2009-11-04 2009-11-04 METHOD FOR STARTING AN INTERNAL COMBUSTION ENGINE AND CONTROL APPARATUS USING THE SAME
PCT/FR2010/052250 WO2011055054A2 (en) 2009-11-04 2010-10-21 Internal combustion engine start method, and control apparatus implementing said method

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EP2496825A2 true EP2496825A2 (en) 2012-09-12
EP2496825B1 EP2496825B1 (en) 2018-09-05

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JP6610470B2 (en) * 2016-08-30 2019-11-27 株式会社デンソー Engine starter
CN111664035A (en) * 2020-06-22 2020-09-15 潍柴动力股份有限公司 Method and device for controlling starter to exit

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FR957788A (en) 1950-02-25
US6516253B2 (en) * 2000-12-05 2003-02-04 Ford Global Technologies, Inc. Engine ready detection using crankshaft speed feedback
US7350602B2 (en) * 2004-07-19 2008-04-01 Ford Global Technologies, Llc System and method for engine start detection for hybrid vehicles
JP4343059B2 (en) * 2004-08-26 2009-10-14 本田技研工業株式会社 Start control device for internal combustion engine
JP4121095B2 (en) 2006-04-19 2008-07-16 富士通テン株式会社 Power management device, control system, and control method
JP4907573B2 (en) * 2008-03-12 2012-03-28 富士重工業株式会社 Engine start control device

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EP2496825B1 (en) 2018-09-05
WO2011055054A3 (en) 2011-08-11
FR2952129B1 (en) 2012-07-13
WO2011055054A2 (en) 2011-05-12
FR2952129A1 (en) 2011-05-06

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