EP0736688B1 - Engine phase detection device for an engine with simultaneous ignition in cylinder pairs, especially for automobiles - Google Patents
Engine phase detection device for an engine with simultaneous ignition in cylinder pairs, especially for automobiles Download PDFInfo
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- EP0736688B1 EP0736688B1 EP19960400705 EP96400705A EP0736688B1 EP 0736688 B1 EP0736688 B1 EP 0736688B1 EP 19960400705 EP19960400705 EP 19960400705 EP 96400705 A EP96400705 A EP 96400705A EP 0736688 B1 EP0736688 B1 EP 0736688B1
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- Prior art keywords
- engine
- phase
- ignition
- cylinders
- detection
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- 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
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/08—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders
Definitions
- the present invention relates to a device for detection of the operating phase of a simultaneous ignition in pairs of cylinders, especially for motor vehicle.
- This device requires in addition to the sensor, a target associated with this tree and comprising one or more indentations.
- the general principle of this analysis is to cause two synchronous cylinders to ignite simultaneously mechanically, i.e. for example the cylinders n ° 1 and 4 and n ° 2 and 3 in the case of a four engine cylinders, and observe the electrical characteristics resulting from the pressure difference in the two corresponding combustion chambers at the time of the spark.
- the object of the invention is therefore to resolve these problems.
- the invention relates to a device for detecting the operating phase of a engine with simultaneous ignition by pairs of cylinders, in particular for a motor vehicle, in which candles associated with the cylinders of each pair, are connected to the ends of a secondary winding of a ignition coil with the primary winding connected to an engine operation control computer through a power stage, the computer receiving a signal representative of the operating phase of the motor, characterized in that one of the windings secondary associated with one of the pairs of cylinders is a mid-point winding, and in that it includes means for detecting and shaping the signal voltage present at this midpoint of the winding, for deliver the signal representative of the engine operating phase.
- Document EP-A-602 803 which discloses a device according to the preamble of claim 1, proposes to place a capacitive sensor facing the middle of the secondary coil to deduce a signal therefrom. whose polarity indicates the motor operating phase.
- a detection device is suitable for detect the operating phase of an ignition engine simultaneous in pairs of cylinders, especially for vehicles automobile.
- spark plugs associated with the corresponding cylinders of each pair are connected to the ends of a secondary winding an ignition coil, the primary winding of which is connected to a computer controlling the operation of the engine, through a power stage.
- the candles are designated by references B1 and B4 for example and correspond to candles associated with cylinders 1 and 4, for example in the case of a four-cylinder engine.
- One of the electrodes of these candles is connected to ground while the other electrodes thereof are connected to the corresponding ends of a secondary winding 1, of an ignition coil 2, the primary winding 3 is associated with supply means controlled by the operating control computer of the motor, and comprising for example a transistor NPN 4.
- the secondary winding 1 is a mid-point winding PM and the detection device according to the invention takes advantage of the fact that the voltage Vpm measured at the midpoint of the secondary winding of the coil, is alternately positive then negative depending on the operating phase of the motor.
- This device is particularly suitable for ignition systems with ignition coils including the primary and secondary windings are distributed over two separate magnetic cores.
- Vpm V1-V4 / 2
- the voltages V1 and V4 are respectively proportional to pressures P1 and P4 in the chambers of combustion of cylinders n ° 1 and 4 of the pair considered.
- This detection and this formatting can for example be carried out through an organ semiconductor with unidirectional conduction.
- the device detection system has a serial circuit connected between the midpoint PM of the secondary winding 1 of the coil 2 and the mass and comprising for example a resistor 5 and a Zener diode 6 which clips the voltage signal Vz when Vpm is positive and limits the negative voltage of Vz when Vpm is negative.
- Resistor 5 limits the current in the Zener diode.
- the signal Vz at the terminals of this Zener diode 6 is a formatted signal which has a voltage pulse for each ignition of the corresponding cylinder as can be seen in the figure 4.
- the midpoint PM of this secondary winding 1 of the ignition coil is connected to a series circuit comprising a resistor 7 and an opto-electronic coupler designated by the general reference 8.
- the opto-electronic coupler comprises by example in a conventional way a light-emitting diode 9 associated with a photo-transistor 10, while a diode 11 is connected to the terminals of this coupler to limit the reverse voltage across its terminals.
- Resistor 7 limits the current in this coupler and sets the detection sensitivity of this one.
- this signal can be directly used by the computer control of engine operation and more particularly by a microcontroller thereof.
- FIG. 7 An example of realization of a system of engine operation control is illustrated on the FIG. 7, in which a computer 12 has been shown engine operation control, receiving input, output of a crankshaft position sensor, designated by the general reference 13, this sensor being associated with a target 14, itself associated with the crankshaft and with indentations.
- this sensor 13 is connected to a microcontroller 15 of the computer, this microcontroller having outputs connected to a power stage 16 ignition coil control as it has was previously described.
- this power stage can be connected at one of the terminals of the primary winding 3 of the coil ignition 2 whose secondary winding 1 is connected to spark plugs for example B1 and B4 from a pair of cylinders associated with the engine.
- the midpoint of the secondary winding 1 of the ignition coil 2 is connected to a circuit similar to that shown in FIG. 5, that is to say comprising a resistor 7, an opto-electronic coupler 8 and a protection diode.
- the output of this opto-electronic coupler 8 is connected to the microcontroller 15 of the computer 12 through an entrance floor designated by general reference 17 on this figure.
- the acquisition of the motor operating phase by the micro-controller, from the signal delivered by the opto-electronic coupler, is done after a time delay determined from from the instant of ignition.
- This time delay can be programmable and is implemented in the microcontroller.
- this timer can be contained in memory of it and calibrated in function of the different characteristics of the system ignition.
- the signal Vi delivered by the opto-electronic coupler alternatively must be in logical state 1 then at logical state 0.
- each engine time can be assigned to the corresponding cylinder of the engine according to the ignition order.
- the engine is started by injection grouped.
- the microcontroller 15 then detects the position angle of the crankshaft by means of sensor 13 and determines so which coil should be ordered and to which instant ignition must be caused.
- engine control can then switch from grouped injection mode to sequential injection.
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- 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)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
La présente invention concerne un dispositif de détection de la phase de fonctionnement d'un moteur à allumage simultané par paires de cylindres, notamment pour véhicule automobile.The present invention relates to a device for detection of the operating phase of a simultaneous ignition in pairs of cylinders, especially for motor vehicle.
On connaít déjà dans l'état de la technique, des dispositifs de ce type dans lesquels des bougies associées aux cylindres de chaque paire, sont raccordées aux extrémités d'un bobinage secondaire d'une bobine d'allumage dont le bobinage primaire est raccordé à un calculateur de contrôle du fonctionnement du moteur à travers un étage de puissance.We already know in the prior art, devices of this type in which associated candles to the cylinders of each pair, are connected to the ends a secondary winding of an ignition coil whose primary winding is connected to a computer motor operation control through a stage of power.
Ces dispositifs sont utilisés pour optimiser le contrôle de l'injection de carburant et de l'avance à l'allumage dans les moteurs à combustion interne et à allumage commandé.These devices are used to optimize the fuel injection and advance control ignition in internal combustion engines and controlled ignition.
Il est alors nécessaire de connaítre non seulement la position angulaire du vilebrequin, mais également la phase de travail du moteur et plus particulièrement de chacun des cylindres de celui-ci.It is then necessary to know not only the angular position of the crankshaft, but also the engine working phase and more particularly each of the cylinders thereof.
A cet effet, on utilise dans l'état de la technique un capteur détectant la position angulaire de l'arbre à cames.For this purpose, in the state of the technique a sensor detecting the angular position of the camshaft.
Ce dispositif nécessite outre le capteur, une cible associée à cet arbre et comportant une ou plusieurs indentations.This device requires in addition to the sensor, a target associated with this tree and comprising one or more indentations.
Il est également possible d'effectuer cette détection par analyse des signaux d'allumage des bougies associées aux cylindres.It is also possible to perform this detection by analysis of spark plug ignition signals associated with cylinders.
Le principe général de cette analyse consiste à provoquer l'allumage simultané de deux cylindres synchrones mécaniquement, c'est à dire par exemple les cylindres n° 1 et 4 et n° 2 et 3 dans le cas d'un moteur à quatre cylindres, et à observer les caractéristiques électriques résultant de la différence de pression dans les deux chambres de combustion correspondantes à l'instant de l'étincelle.The general principle of this analysis is to cause two synchronous cylinders to ignite simultaneously mechanically, i.e. for example the cylinders n ° 1 and 4 and n ° 2 and 3 in the case of a four engine cylinders, and observe the electrical characteristics resulting from the pressure difference in the two corresponding combustion chambers at the time of the spark.
Cette seconde possibilité de détection de la phase et plus économique que la première, car elle supprime un capteur spécifique et sa cible associée.This second possibility of detecting the phase and more economical than the first, because it removes a specific sensor and its associated target.
Cependant, l'analyse des signaux d'allumage nécessite des moyens de mesure de tension aux bornes des bougies, ainsi qu'un dispositif de filtrage et de comparaison de ces tensions.However, the analysis of the ignition signals requires voltage measurement means across the candles, as well as a filtering and comparison device of these tensions.
Dans le cas des systèmes d'allumage à une bobine d'allumage par paire de cylindres, l'information utile n'est pas présente au niveau du bobinage primaire de cette bobine et il est alors nécessaire d'effectuer une mesure au niveau du bobinage secondaire de celle-ci.In the case of single coil ignition systems ignition by pair of cylinders, useful information is not present at the primary winding of this coil and it is then necessary to perform a measurement at the secondary winding thereof.
Les documents EP-A-272 225 et 404 763 proposent des solutions qui consistent à placer un ou plusieurs capteurs capacitifs sur le ou les fils de haute tension assurant la connexion aux bougies.Documents EP-A-272 225 and 404 763 propose solutions which consist in placing one or several capacitive sensors on the high wire (s) voltage ensuring connection to the spark plugs.
Cependant dans les dispositifs décrits dans ces documents, il est nécessaire d'effectuer une comparaison analogique des tensions mesurées.However in the devices described in these documents it is necessary to perform a comparison analog of the measured voltages.
Ceci présente trois inconvénients, à savoir :
Le but de l'invention est donc de résoudre ces problèmes.The object of the invention is therefore to resolve these problems.
A cet effet, l'invention a pour objet un dispositif de détection de la phase de fonctionnement d'un moteur à allumage simultané par paires de cylindres, notamment pour véhicule automobile, dans lequel des bougies associées aux cylindres de chaque paire, sont raccordées aux extrémités d'un bobinage secondaire d'une bobine d'allumage dont le bobinage primaire est raccordé à un calculateur de contrôle du fonctionnement du moteur à travers un étage de puissance, le calculateur recevant un signal représentatif de la phase de fonctionnement du moteur, caractérisé en ce que l'un des bobinages secondaires associés à l'une des paires de cylindres est un bobinage à point milieu, et en ce qu'il comporte des moyens de détection et de mise en forme du signal de tension présente à ce point milieu du bobinage, pour délivrer au calculateur le signal représentatif de la phase de fonctionnement du moteur.To this end, the invention relates to a device for detecting the operating phase of a engine with simultaneous ignition by pairs of cylinders, in particular for a motor vehicle, in which candles associated with the cylinders of each pair, are connected to the ends of a secondary winding of a ignition coil with the primary winding connected to an engine operation control computer through a power stage, the computer receiving a signal representative of the operating phase of the motor, characterized in that one of the windings secondary associated with one of the pairs of cylinders is a mid-point winding, and in that it includes means for detecting and shaping the signal voltage present at this midpoint of the winding, for deliver the signal representative of the engine operating phase.
Le document EP-A-602 803 qui divulgue un dispositif selon le préambule de la revendication 1 présente, propose de placer un capteur capacitif face au milieu de la bobine secondaire pour en déduire un signal
dont la polarité indique la phase de fonctionnement du moteur.Document EP-A-602 803, which discloses a device according to the preamble of
L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :
- la Fig.1 représente un schéma synoptique illustrant un circuit de raccordement de bougies de cylindres associés dans une paire de cylindres d'un moteur à combustion interne et à allumage simultané notamment de véhicule automobile;
- la Fig.2 représente un exemple de signaux de tension en différents points du circuit représenté sur la figure 1 dans le cas où le cylindre n°1 est en phase de compression;
- la Fig.3 représente un premier mode de réalisation d'un dispositif de détection selon l'invention;
- la Fig.4 représente un exemple d'un signal représentatif de la phase de fonctionnement d'un moteur, issu du dispositif de détection représenté sur la figure 3;
- la Fig.5 représente un second exemple de réalisation d'un dispositif de détection selon l'invention;
- la Fig.6 représente des signaux obtenus en différents points du dispositif représenté sur la figure 5; et
- la Fig.7 représente un schéma synoptique illustrant la structure d'un système de contrôle du fonctionnement d'un moteur, comportant un dispositif de détection selon l'invention.
- Fig.1 shows a block diagram illustrating a circuit for connecting spark plugs of cylinders associated in a pair of cylinders of an internal combustion engine and simultaneous ignition in particular of a motor vehicle;
- Fig.2 shows an example of voltage signals at different points of the circuit shown in Figure 1 in the case where the cylinder n ° 1 is in compression phase;
- Fig.3 shows a first embodiment of a detection device according to the invention;
- Fig.4 shows an example of a signal representative of the operating phase of an engine, from the detection device shown in Figure 3;
- Fig.5 shows a second embodiment of a detection device according to the invention;
- Fig.6 shows signals obtained at different points of the device shown in Figure 5; and
- Fig.7 shows a block diagram illustrating the structure of a system for controlling the operation of an engine, comprising a detection device according to the invention.
Comme on peut le voir sur ces figures, un dispositif de détection selon l'invention est adapté pour détecter la phase de fonctionnement d'un moteur à allumage simultané par paires de cylindres, notamment pour véhicule automobile.As can be seen in these figures, a detection device according to the invention is suitable for detect the operating phase of an ignition engine simultaneous in pairs of cylinders, especially for vehicles automobile.
Dans un tel moteur, des bougies d'allumage associées aux cylindres correspondants de chaque paire, sont raccordées aux extrémités d'un bobinage secondaire d'une bobine d'allumage, dont le bobinage primaire est raccordé à un calculateur de contrôle du fonctionnement du moteur, à travers un étage de puissance.In such an engine, spark plugs associated with the corresponding cylinders of each pair, are connected to the ends of a secondary winding an ignition coil, the primary winding of which is connected to a computer controlling the operation of the engine, through a power stage.
Sur la figure 1, les bougies sont désignées par
les références B1 et B4 par exemple et correspondent aux
bougies associées aux cylindres n° 1 et 4, par exemple
dans le cas d'un moteur à quatre cylindres.In Figure 1, the candles are designated by
references B1 and B4 for example and correspond to
candles associated with
L'une des électrodes de ces bougies est raccordée
à la masse tandis que les autres électrodes de celles-ci
sont raccordées aux extrémités correspondantes d'un
bobinage secondaire 1, d'une bobine d'allumage 2, dont le
bobinage primaire 3 est associé à des moyens d'alimentation
pilotés par le calculateur de contrôle du fonctionnement
du moteur, et comprenant par exemple un transistor
NPN 4.One of the electrodes of these candles is connected
to ground while the other electrodes thereof
are connected to the corresponding ends of a
Dans l'exemple de réalisation représenté, le
bobinage secondaire 1 est un bobinage à point milieu PM et
le dispositif de détection selon l'invention met à profit
le fait que la tension Vpm mesurée au point milieu du
bobinage secondaire de la bobine, est alternativement
positive puis négative en fonction de la phase de fonctionnement
du moteur. In the embodiment shown, the
Ce dispositif est particulièrement adapté aux systèmes d'allumage comportant des bobines d'allumage dont les bobinages primaire et secondaire sont répartis sur deux noyaux magnétiques distincts.This device is particularly suitable for ignition systems with ignition coils including the primary and secondary windings are distributed over two separate magnetic cores.
On conçoit en effet comme on peut le voir sur la
figure 2, que pendant la phase d'étincelage, la tension
Vpm est liée aux tensions V1 et V4 aux bornes des bougies
B1 et B4 respectivement, par la relation :
Les tensions V1 et V4 sont respectivement proportionnelles aux pressions P1 et P4 dans les chambres de combustion des cylindres n° 1 et 4 de la paire considérée.The voltages V1 and V4 are respectively proportional to pressures P1 and P4 in the chambers of combustion of cylinders n ° 1 and 4 of the pair considered.
Si le cylindre n° 1 correspondant à la bougie B1
est en phase de compression, alors :
Par contre, si le cylindre n° 4 correspondant à
la bougie B4 est en phase de compression, alors :
On conçoit alors qu'en détectant et en mettant
en forme le signal de tension présente au point milieu PM
du bobinage secondaire 1 de la bobine d'allumage, on peut
établir un signal représentatif de la phase de fonctionnement
du moteur qui, une fois mis en forme est directement
utilisable par le calculateur de contrôle du fonctionnement
du moteur.We then understand that by detecting and putting
in form the voltage signal present at the midpoint PM
from the
Cette détection et cette mise en forme peuvent par exemple être réalisées par l'intermédiaire d'un organe à semi-conducteur à conduction unidirectionnelle.This detection and this formatting can for example be carried out through an organ semiconductor with unidirectional conduction.
Un exemple de réalisation d'un tel dispositif est représenté sur la figure 3, dans laquelle des numéros de référence identiques désignent des éléments identiques déjà décrits en regard de la figure 1.An example of embodiment of such a device is shown in Figure 3, in which numbers identical reference points designate identical elements already described with reference to FIG. 1.
On reconnaít en effet sur cette figure 3, le
transistor 4, la bobine d'allumage 2, le bobinage primaire
3 et le bobinage secondaire 1 de celle-ci, et les bougies
B1 et B4.We recognize indeed in this figure 3, the
transistor 4,
Dans cet exemple de réalisation, le dispositif
de détection comporte un circuit série connecté entre le
point milieu PM du bobinage secondaire 1 de la bobine 2 et
la masse et comprenant par exemple une résistance 5 et une
diode Zener 6 qui écrête le signal de tension Vz lorsque
Vpm est positive et limite la tension négative de Vz
lorsque Vpm est négative.In this exemplary embodiment, the device
detection system has a serial circuit connected between the
midpoint PM of the
La résistance 5 permet de limiter le courant dans la diode Zener.Resistor 5 limits the current in the Zener diode.
On conçoit alors que le signal Vz aux bornes de
cette diode Zener 6 est un signal mis en forme qui présente
une impulsion de tension pour chaque allumage du
cylindre correspondant comme on peut le voir sur la figure
4.It is therefore conceivable that the signal Vz at the terminals of
this
Sur la figure 5, on a représenté un autre exemple de réalisation d'un tel dispositif, dans laquelle des numéros de référence identiques désignent également des éléments déjà décrits en regard des figures 1 et 3.In Figure 5, there is shown another exemplary embodiment of such a device, in which identical reference numbers also designate elements already described with reference to FIGS. 1 and 3.
On reconnaít en effet sur cette figure 5, le
transistor 4, la bobine d'allumage 2, le bobinage primaire
3 et le bobinage secondaire 1 de celle-ci, la bougie B1 et
la bougie B4.We recognize indeed in this figure 5, the
transistor 4,
Dans l'exemple de réalisation représenté sur
cette figure, le point milieu PM de ce bobinage secondaire
1 de la bobine d'allumage est raccordé à un circuit série
comprenant une résistance 7 et à un coupleur opto-électronique
désigné par la référence générale 8.In the embodiment shown on
this figure, the midpoint PM of this
Le coupleur opto-électronique comporte par
exemple de manière classique une diode électroluminescente
9 associée à un photo-transistor 10, tandis qu'une diode
de protection 11 est connectée aux bornes de ce coupleur
pour limiter la tension inverse aux bornes de celui-ci. The opto-electronic coupler comprises by
example in a conventional way a light-
La résistance 7 permet de limiter le courant dans ce coupleur et fixe la sensibilité de détection de celui-ci.Resistor 7 limits the current in this coupler and sets the detection sensitivity of this one.
On conçoit que cette structure permet d'obtenir un isolement galvanique et donc une plus grande sécurité en cas de défaillance du dispositif d'allumage.We can see that this structure makes it possible to obtain galvanic isolation and therefore greater security in the event of failure of the ignition device.
On a illustré sur la figure 6, la tension Vi
obtenue sur le collecteur du photo-transistor 10 du coupleur
opto-électronique lorsque la tension Vpm est positive.
Ce signal Vi présente une impulsion négative lorsque
le cylindre n°1 est en phase de compression.Illustrated in Figure 6, the voltage Vi
obtained on the collector of the photo-transistor 10 of the coupler
opto-electronic when the voltage Vpm is positive.
This signal Vi has a negative pulse when
On conçoit alors que grâce au dispositif de détection selon l'invention, qui délivre, à partir du signal de tension présente au point milieu du bobinage par exemple secondaire de la bobine d'allumage, un signal représentatif de la phase de fonctionnement du moteur, ce signal peut être directement utilisé par le calculateur de contrôle du fonctionnement du moteur et plus particulièrement par un micro-contrôleur de celui-ci.We can then see that thanks to the detection according to the invention, which delivers, from the voltage signal present at the midpoint of the winding by secondary example of the ignition coil, a signal representative of the engine operating phase, this signal can be directly used by the computer control of engine operation and more particularly by a microcontroller thereof.
Un exemple de réalisation d'un système de
contrôle du fonctionnement d'un moteur est illustré sur la
figure 7, sur laquelle on a représenté un calculateur 12
de contrôle du fonctionnement du moteur, recevant en
entrée, la sortie d'un capteur de position du vilebrequin,
désigné par la référence générale 13, ce capteur étant
associé à une cible 14, elle-même associée au vilebrequin
et comportant des indentations.An example of realization of a system of
engine operation control is illustrated on the
FIG. 7, in which a
Plus particulièrement, ce capteur 13 est relié
à un micro-contrôleur 15 du calculateur, ce micro-contrôleur
présentant des sorties reliées à un étage de puissance
16 de commande des bobines d'allumage comme cela a
été décrit précédemment.More particularly, this
En effet, cet étage de puissance peut être relié
à l'une des bornes du bobinage primaire 3 de la bobine
d'allumage 2 dont le bobinage secondaire 1 est relié aux
bougies par exemple B1 et B4 d'une paire de cylindres
associés du moteur.Indeed, this power stage can be connected
at one of the terminals of the primary winding 3 of the
Le point milieu du bobinage secondaire 1 de la
bobine d'allumage 2 est relié à un circuit analogue à
celui représenté sur la figure 5, c'est à dire comportant
une résistance 7, un coupleur opto-électronique 8 et une
diode de protection.The midpoint of the secondary winding 1 of the
La sortie de ce coupleur opto-électronique 8 est
reliée au micro-contrôleur 15 du calculateur 12 à travers
un étage d'entrée désigné par la référence générale 17 sur
cette figure.The output of this opto-
Afin de masquer la phase d'établissement de l'arc, qui est généralement perturbée, l'acquisition de la phase de fonctionnement du moteur par le micro-contrôleur, à partir du signal délivré par le coupleur opto-électronique, se fait après une temporisation déterminée à partir de l'instant d'allumage.In order to hide the establishment phase of the arc, which is usually disturbed, the acquisition of the motor operating phase by the micro-controller, from the signal delivered by the opto-electronic coupler, is done after a time delay determined from from the instant of ignition.
Cette temporisation peut être programmable et est implémentée dans le micro-contrôleur.This time delay can be programmable and is implemented in the microcontroller.
Dans ce cas, la valeur de cette temporisation peut être contenue en mémoire de celui-ci et calibrée en fonction des différentes caractéristiques du système d'allumage.In this case, the value of this timer can be contained in memory of it and calibrated in function of the different characteristics of the system ignition.
On conçoit alors qu'à chaque instant d'acquisition,
le signal Vi délivré par le coupleur opto-électronique,
doit alternativement être à l'état logique 1 puis à
l'état logique 0.We then understand that at each acquisition instant,
the signal Vi delivered by the opto-electronic coupler,
alternatively must be in
Lorsque la séquence de fonctionnement est reconnue par détection d'une suite définie d'alternances, chaque temps moteur peut être affecté au cylindre correspondant du moteur en fonction de l'ordre d'allumage.When the operating sequence is recognized by detection of a defined sequence of alternations, each engine time can be assigned to the corresponding cylinder of the engine according to the ignition order.
Le démarrage du moteur est effectué en injection groupée.The engine is started by injection grouped.
Le micro-contrôleur 15 détecte alors la position
angulaire du vilebrequin au moyen du capteur 13 et détermine
ainsi quelle bobine doit être commandée et à quel
instant l'allumage doit être provoqué.The
Lorsque la bobine est commandée, l'allumage est provoqué sur une paire de cylindres déterminée, mais le 5 cylindre actif reste indéterminé.When the coil is ordered, ignition is caused on a determined pair of cylinders, but the 5 active cylinder remains undetermined.
Une fois la séquence reconnue par détection de la suite définie d'alternances, chaque temps moteur étant affecté au cylindre correspondant, le contrôle moteur peut alors passer du mode d'injection groupé, au mode d'injection séquentiel.Once the sequence recognized by detection of the defined sequence of alternations, each engine time being assigned to the corresponding cylinder, engine control can then switch from grouped injection mode to sequential injection.
Il va de soi bien entendu que différents modes de réalisation des moyens de détection et de mise en forme du signal de tension présente au point milieu du bobinage secondaire peuvent être envisagés.It goes without saying of course that different modes of realization of the detection and shaping means of the voltage signal present at the midpoint of the winding secondary can be considered.
Claims (5)
- Engine phase detection device for an engine with simultaneous ignition in pairs of cylinders, especially for automobiles, in which spark plugs (B1, B4) associated with the cylinders of each pair are connected to the ends of a secondary winding (1) of an ignition coil (2) whose primary winding (3) is connected to a computer (12) for controlling the functioning of the engine via a power stage (16), the computer receiving a signal representing the phase of the engine, characterised in that one of the secondary windings associated with one of the pairs of cylinders is a winding with a centre point, and in that it comprises means (5, 6); (7, 8, 9, 10, 11) of detection and of shaping the voltage signal present at this centre point PN of the winding, to deliver to the computer the signal representing the phase of the engine.
- Device according to claim 1, characterised in that the means of detection and of shaping comprise a series circuit connected between the centre point and the earth and fitted with a resistor (5) and a Zener diode (6), at the terminals of which is generated the signal representing the engine phase.
- Device according to claim 1, characterised in that the means of detection and of shaping comprise a series circuit fitted with a resistor (7) and an opto-electronic sensor (8) at the output of which is delivered the signal representing the engine phase.
- Device according to any one of the preceding claims, characterised in that the primary (3) and secondary (1) windings of the ignition coil (2) are arranged on separate magnetic cores.
- Device according to any one of the preceding claims, characterised in that the computer (12) is adapted to acquire the phase information on the signal representing the engine phase, with a delay determined from the moment of ignition of the corresponding spark plugs.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9504051A FR2732723B1 (en) | 1995-04-05 | 1995-04-05 | DEVICE FOR DETECTING THE OPERATING PHASE OF A MOTOR WITH SIMULTANEOUS IGNITION BY PAIRS OF CYLINDERS, PARTICULARLY FOR MOTOR VEHICLES |
| FR9504051 | 1995-04-05 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0736688A2 EP0736688A2 (en) | 1996-10-09 |
| EP0736688A3 EP0736688A3 (en) | 1996-10-16 |
| EP0736688B1 true EP0736688B1 (en) | 1999-06-23 |
Family
ID=9477786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19960400705 Expired - Lifetime EP0736688B1 (en) | 1995-04-05 | 1996-04-01 | Engine phase detection device for an engine with simultaneous ignition in cylinder pairs, especially for automobiles |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0736688B1 (en) |
| DE (1) | DE69602986T2 (en) |
| ES (1) | ES2135854T3 (en) |
| FR (1) | FR2732723B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111245427B (en) * | 2020-01-14 | 2021-03-30 | 武汉大数据产业发展有限公司 | Big data real-time monitoring system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4018895C2 (en) * | 1990-06-13 | 1997-10-09 | Bosch Gmbh Robert | Diagnostic device |
| DE4028554C2 (en) * | 1990-09-08 | 2000-02-17 | Bosch Gmbh Robert | Ignition system of an internal combustion engine with an arrangement for coupling the ignition signal on the secondary side |
| US5493496A (en) * | 1992-12-15 | 1996-02-20 | Ford Motor Company | Cylinder number identification on a distributorless ignition system engine lacking CID |
| US5410253A (en) * | 1993-04-08 | 1995-04-25 | Delco Electronics Corporation | Method of indicating combustion in an internal combustion engine |
-
1995
- 1995-04-05 FR FR9504051A patent/FR2732723B1/en not_active Expired - Fee Related
-
1996
- 1996-04-01 EP EP19960400705 patent/EP0736688B1/en not_active Expired - Lifetime
- 1996-04-01 DE DE1996602986 patent/DE69602986T2/en not_active Expired - Fee Related
- 1996-04-01 ES ES96400705T patent/ES2135854T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0736688A3 (en) | 1996-10-16 |
| DE69602986T2 (en) | 1999-12-02 |
| DE69602986D1 (en) | 1999-07-29 |
| EP0736688A2 (en) | 1996-10-09 |
| ES2135854T3 (en) | 1999-11-01 |
| FR2732723B1 (en) | 1997-06-20 |
| FR2732723A1 (en) | 1996-10-11 |
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