EP0636775B1 - Combustion gas supply system for the internal combustion engine of a vehicle - Google Patents

Combustion gas supply system for the internal combustion engine of a vehicle Download PDF

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Publication number
EP0636775B1
EP0636775B1 EP94401676A EP94401676A EP0636775B1 EP 0636775 B1 EP0636775 B1 EP 0636775B1 EP 94401676 A EP94401676 A EP 94401676A EP 94401676 A EP94401676 A EP 94401676A EP 0636775 B1 EP0636775 B1 EP 0636775B1
Authority
EP
European Patent Office
Prior art keywords
motor
movement
supply system
shaft
butterfly
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.)
Expired - Lifetime
Application number
EP94401676A
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German (de)
French (fr)
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EP0636775A1 (en
Inventor
Jean-Pierre Ricouard
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.)
Sagem SA
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Sagem SA
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Filing date
Publication date
Application filed by Sagem SA filed Critical Sagem SA
Publication of EP0636775A1 publication Critical patent/EP0636775A1/en
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Publication of EP0636775B1 publication Critical patent/EP0636775B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
    • F02D2011/103—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being alternatively mechanically linked to the pedal or moved by an electric actuator

Definitions

  • the present invention relates to a combustion gas supply system of a vehicle internal combustion engine, comprising, in an intake manifold, an intake throttle integral with the displacement of a shaft of a regulation motor itself integral with the movement of a mechanical control member and means for determining the displacement of the motor, relative to a position of rest, under the action of mechanical control, the mechanical control member directly controlling the movement of the motor.
  • the speed of the engine is notably determined at from the accelerator pedal, which acts on the intake throttle.
  • the engine To operate in optimal conditions, so as not to stall or not polluting excessively, the engine must be powered by a mixture of air and gasoline desired flow rate and remaining in well defined proportions.
  • a speed control computer motor controls, by a stepping motor, a circuit adjustment needle additional and prevents stalling by the corresponding air supply.
  • Document FR-A-2 599 805 teaches a feeding system of the type mentioned above, in which the motor shaft is integral in rotation with the butterfly and the stator associated is rotatably mounted and driven by an accelerator pedal.
  • the present invention aims to solve this problem.
  • the supply system of the invention is characterized in that it is provided a microprocessor to cyclically compare the displacement of the motor to a threshold of movement of its tree and the butterfly in a given period of time and thus control the movement of the motor shaft and therefore of the throttle valve to limit the speed of movement of the shaft by controlling a complementary movement and progressive of the latter.
  • the power system shown in Figure 1 is here mounted on the motor internal combustion of a car and comprises a butterfly 1 mounted mobile, here in rotation, in an air intake manifold 2 of a carburetor not shown.
  • the butterfly 1 is integral, in rotation about an axis 3, with the shaft 4 of a motor 5, step by step in this example, housed in a housing 6 with a microprocessor 7 which controls it and with an angular displacement sensor 8.
  • the shaft 4 is respectively carried at its two ends by two bearings not shown integral with the tubing 2 and carries the housing 6 leaving it free to rotate around the tree 4.
  • the displacement sensor 8 cyclically determines the angular position of the box 6 relative to the pipe 2 and transmits a signal corresponding to the microprocessor 7.
  • a cable 11 connects an accelerator pedal 10 to one end of a link 12, the other end of which has a hollow spherical cap 13 adjusted on a spherical stud 14, eccentric with respect to the axis 3, of the housing 6.
  • a shaft 4 of the stepping motor 5 is attached a radial index 15 moving between two stops 16-17 of the housing 6 and thus limiting the range P ( Figure 3) of rotation angular of the shaft 4 relative to the housing 6.
  • the accelerator pedal 10 directly drives the housing 6.
  • the corresponding rotation by relative to the tubing 2 is measured by the sensor 8 and the series of signals corresponding measurement allows the microprocessor 7 to determine the amplitude and the speed of this rotation.
  • the microprocessor 7 has in memory a corresponding threshold value at a maximum admissible value DO (FIG. 3) of angular variation of the position of throttle 1 in a given time period TO, a fraction of a second, value which it compares cyclically to the measured angle of rotation of the housing 6.
  • the microprocessor 7 then controls the stepper motor 5 if the variation angular exceeds the threshold value DO in a time less than the duration TO, that is to say at a significant amplitude and excessive speed.
  • Curve 22 is always in this range P, even if it means following it temporarily an edge and not to optimally correct the deviation of the butterfly 1 if the correction to be made exceeds half of this range P.
  • absolute angular position sensor 8 could be replaced by a relative displacement detector, such as an accelerometer, from the measurements of which the microprocessor 7 would determine relative rotations.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Description

La présente invention concerne un système d'alimentation en gaz comburant d'un moteur à combustion interne de véhicule, comprenant, dans une tubulure d'admission, un papillon d'admission solidaire en déplacement d'un arbre d'un moteur de régulation lui-même solidaire en déplacement d'un organe de commande mécanique et des moyens de détermination du déplacement du moteur, par rapport à une position de repos, sous l'action de commande mécanique, l'organe de commande mécanique commandant directement le déplacement du moteur.The present invention relates to a combustion gas supply system of a vehicle internal combustion engine, comprising, in an intake manifold, an intake throttle integral with the displacement of a shaft of a regulation motor itself integral with the movement of a mechanical control member and means for determining the displacement of the motor, relative to a position of rest, under the action of mechanical control, the mechanical control member directly controlling the movement of the motor.

Dans le cas d'un moteur à essence, la vitesse du moteur est notamment déterminée à partir de la pédale d'accélération, qui agit sur le papillon d'admission.In the case of a petrol engine, the speed of the engine is notably determined at from the accelerator pedal, which acts on the intake throttle.

Pour fonctionner dans des conditions optimales, afin de ne pas caler ou de ne pas polluer exagérément, le moteur doit être alimenté par un mélange d'air et d'essence au débit voulu et restant dans des proportions bien définies.To operate in optimal conditions, so as not to stall or not polluting excessively, the engine must be powered by a mixture of air and gasoline desired flow rate and remaining in well defined proportions.

Or, au ralenti, la mise en route d'un appareil électrique, comme un climatiseur, charge brutalement le moteur, qui risque de caler. Pour y remédier, il est connu de prévoir un circuit supplémentaire d'arrivée d'air. Un calculateur de contrôle de la vitesse du moteur commande, par un moteur pas à pas, un pointeau de réglage du circuit supplémentaire et évite le calage par l'arrivée d'air correspondante.However, at idle, switching on an electrical device, such as an air conditioner, charges suddenly the engine, which could stall. To remedy this, it is known to provide a additional air supply circuit. A speed control computer motor controls, by a stepping motor, a circuit adjustment needle additional and prevents stalling by the corresponding air supply.

Le document FR-A-2 599 805 enseigne un système d'alimentation du type mentionné ci-dessus, dans lequel l'arbre du moteur est solidaire en rotation du papillon et le stator associé est monté rotatif et entraíné par une pédale d'accélération.Document FR-A-2 599 805 teaches a feeding system of the type mentioned above, in which the motor shaft is integral in rotation with the butterfly and the stator associated is rotatably mounted and driven by an accelerator pedal.

Cependant, en cas d'enfoncement ou de relâchement brusque de la pédale d'accélération, le moteur ne peut pas fonctionner dans des conditions optimales.However, if the pedal is suddenly depressed or released acceleration, the engine cannot operate under optimal conditions.

La présente invention vise à résoudre ce problème.The present invention aims to solve this problem.

A cet effet, le système d'alimentation de l'invention est caractérisé par le fait qu'il est prévu un microprocesseur pour comparer cycliquement le déplacement du moteur à un seuil de déplacement de son arbre et du papillon en un laps de temps donné et commander ainsi le déplacement de l'arbre du moteur et donc du papillon pour limiter la vitesse de déplacement de l'arbre en commandant un déplacement complémentaire et progressif de ce dernier. To this end, the supply system of the invention is characterized in that it is provided a microprocessor to cyclically compare the displacement of the motor to a threshold of movement of its tree and the butterfly in a given period of time and thus control the movement of the motor shaft and therefore of the throttle valve to limit the speed of movement of the shaft by controlling a complementary movement and progressive of the latter.

Ainsi, tout déplacement de l'organe de commande qui ferait sortir le moteur de sa plage optimale de fonctionnement est compensé par l'action du moteur de régulation et une commande mécanique d'accélération excessive est transmise au moteur de régulation sous une forme intégrée, c'est-à-dire étalée dans le temps.Thus, any movement of the control member which would bring the engine out of its range optimal functioning is compensated by the action of the regulation motor and a mechanical command of excessive acceleration is transmitted to the regulation motor in an integrated form, that is to say spread over time.

L'invention sera mieux comprise à l'aide de la description suivante de la forme de réalisation préférée du sytème d'alimentation de l'invention, en référence au dessin annexé, sur lequel :

  • la figure 1 est une vue éclatée en perspective du dispositif de l'invention,
  • la figure 2 est un diagramme fonctionnel en expliquant le fonctionnement et
  • la figure 3 illustre la loi de régulation de la déviation angulaire du papillon.
The invention will be better understood using the following description of the preferred embodiment of the supply system of the invention, with reference to the appended drawing, in which:
  • FIG. 1 is an exploded perspective view of the device of the invention,
  • Figure 2 is a functional diagram explaining the operation and
  • FIG. 3 illustrates the law for regulating the angular deviation of the butterfly.

Le système d'alimentation représenté sur la figure 1 est ici monté sur le moteur à combustion interne d'une voiture et comporte un papillon 1 monté mobile, ici en rotation, dans une tubulure 2 d'admission d'air d'un carburateur non représenté. Le papillon 1 est solidaire, en rotation selon un axe 3, de l'arbre 4 d'un moteur 5, pas à pas dans cet exemple, logé dans un boítier 6 avec un microprocesseur 7 qui le commande et avec un capteur de déplacement angulaire 8. The power system shown in Figure 1 is here mounted on the motor internal combustion of a car and comprises a butterfly 1 mounted mobile, here in rotation, in an air intake manifold 2 of a carburetor not shown. The butterfly 1 is integral, in rotation about an axis 3, with the shaft 4 of a motor 5, step by step in this example, housed in a housing 6 with a microprocessor 7 which controls it and with an angular displacement sensor 8.

L'arbre 4 est respectivement porté à ses deux extrémités par deux paliers non représentés solidaires de la tubulure 2 et porte le boítier 6 en le laissant libre de tourner autour de l'arbre 4.The shaft 4 is respectively carried at its two ends by two bearings not shown integral with the tubing 2 and carries the housing 6 leaving it free to rotate around the tree 4.

Le capteur de déplacement 8 détermine cycliquement la position angulaire du boítier 6 par rapport à la tubulure 2 et transmet un signal correspondant au microprocesseur 7.The displacement sensor 8 cyclically determines the angular position of the box 6 relative to the pipe 2 and transmits a signal corresponding to the microprocessor 7.

Un câble 11 relie une pédale d'accélération 10 à une extrémité d'une biellette 12 dont l'autre extrémité comporte une calotte sphérique creuse 13 ajustée sur un téton sphérique 14, excentrique par rapport à l'axe 3, du boítier 6.A cable 11 connects an accelerator pedal 10 to one end of a link 12, the other end of which has a hollow spherical cap 13 adjusted on a spherical stud 14, eccentric with respect to the axis 3, of the housing 6.

A l'arbre 4 du moteur pas à pas 5 est fixé un index radial 15 se déplaçant entre deux butées 16-17 du boítier 6 et limitant ainsi la plage P (figure 3) de rotation angulaire de l'arbre 4 par rapport au boítier 6.A shaft 4 of the stepping motor 5 is attached a radial index 15 moving between two stops 16-17 of the housing 6 and thus limiting the range P (Figure 3) of rotation angular of the shaft 4 relative to the housing 6.

Le fonctionnement du système d'alimentation de l'invention va maintenant être décrit.The operation of the power system of the invention will now be described.

Comme le montre le diagramme de la figure 2, la pédale d'accélération 10 entraíne directement en rotation le boítier 6. La rotation correspondante par rapport à la tubulure 2 est mesurée par le capteur 8 et la suite de signaux de mesure correspondants permet au microprocesseur 7 de déterminer l'amplitude et la vitesse de cette rotation.As the diagram in FIG. 2 shows, the accelerator pedal 10 directly drives the housing 6. The corresponding rotation by relative to the tubing 2 is measured by the sensor 8 and the series of signals corresponding measurement allows the microprocessor 7 to determine the amplitude and the speed of this rotation.

Le microprocesseur 7 comporte en mémoire une valeur de seuil correspondant à une valeur maximale admissible DO (figure 3) de variation angulaire de la position du papillon 1 en un laps de temps TO donné, une fraction de seconde, valeur qu'il compare cycliquement à l'angle de rotation mesuré du boítier 6. Le microprocesseur 7 commande alors le moteur pas à pas 5 si la variation angulaire dépasse la valeur de seuil DO en un temps inférieur à la durée TO, c'est-à-dire a une amplitude significative et une vitesse excessive.The microprocessor 7 has in memory a corresponding threshold value at a maximum admissible value DO (FIG. 3) of angular variation of the position of throttle 1 in a given time period TO, a fraction of a second, value which it compares cyclically to the measured angle of rotation of the housing 6. The microprocessor 7 then controls the stepper motor 5 if the variation angular exceeds the threshold value DO in a time less than the duration TO, that is to say at a significant amplitude and excessive speed.

Comme le montre la figure 3, dont la courbe 20 représente la déviation angulaire D du boítier 6 en fonction du temps t, avec une origine des angles arbitrairement fixée à zéro pour une position initiale de repos, la position angulaire 21 du papillon 1 est confondue avec la courbe 20 tant que la déviation angulaire 20 du boítier 6 est inférieure au seuil DO. Après le début de la variation de l'angle D pour la courbe 20, ce seuil est ici dépassé après une durée inférieure à la durée TO, si bien que le microprocesseur 7 commande ensuite le moteur pas à pas 5 pour faire tourner son arbre 4 en sens inverse de celui du boítier 6 (flèche F1), afin que la rotation du papillon 1 suive une courbe 22 présentant une pente moindre que celle de la courbe 20 dans sa partie variable, jusqu'à rejoindre plus tard la courbe 20.As shown in Figure 3, whose curve 20 represents the deviation angular D of the case 6 as a function of time t, with an origin of the angles arbitrarily set to zero for an initial rest position, the position angular 21 of butterfly 1 is confused with curve 20 as long as the angular deviation 20 of the housing 6 is less than the threshold DO. After the start of the variation of the angle D for curve 20, this threshold is exceeded here after a duration less than the duration TO, so that the microprocessor 7 commands then the stepper motor 5 to rotate its shaft 4 in the opposite direction from that of the housing 6 (arrow F1), so that the rotation of the butterfly 1 follows a curve 22 having a lesser slope than that of curve 20 in its variable part, until joining curve 20 later.

Les courbes 23 et 24, parallèles à la courbe 20 et ici à égale distance de celle-ci, délimitent la plage P de régulation du moteur 5, définie par les butées 16, 17. La courbe 22 est toujours dans cette plage P, quitte à en suivre temporairement un bord et à ne pas corriger de façon optimale la déviation du papillon 1 si la correction à apporter excède la moitié de cette plage P.The curves 23 and 24, parallel to the curve 20 and here at equal distance from the latter, delimit the regulation range P of the motor 5, defined by the stops 16, 17. Curve 22 is always in this range P, even if it means following it temporarily an edge and not to optimally correct the deviation of the butterfly 1 if the correction to be made exceeds half of this range P.

Connaissant la position absolue du papillon 1 dans la tubulure 2 et l'intensité de la commande mécanique provenant de la pédale 10, on comprendra qu'il est possible de mémoriser, dans le mircroprocesseur 7, des tables de valeurs ou des algorithmes permettant d'adapter au mieux la vitesse de rotation du papillon 1.Knowing the absolute position of the butterfly 1 in the pipe 2 and the intensity of the mechanical control coming from the pedal 10, it will be understood that it it is possible to store, in the mircroprocessor 7, tables of values or algorithms to best adapt the speed of rotation of the butterfly 1.

Entre autres, on peut prévoir de modifier la valeur du seuil angulaire DO, de la durée TO et de la pente de la courbe 22 en fonction de la position absolue initiale du papillon 1 et, par exemple, permettre une rotation plus rapide lorsque le papillon 1 est déjà en position de semi-ouverture de la tubulure 2, donc avec un moteur de voiture tournant à allure soutenue et ainsi mieux apte à accélérer.Among other things, provision can be made to modify the value of the angular threshold DO, of the duration TO and the slope of curve 22 as a function of the absolute position initial throttle 1 and, for example, allow faster rotation when the butterfly 1 is already in the semi-open position of the pipe 2, therefore with a car engine running at high speed and thus better able to accelerate.

Inversement, le capteur 8 de position angulaire absolue pourrait être remplacé par un détecteur de déplacement relatif, tel qu'un accéléromètre, à partir des mesures duquel le microprocesseur 7 déterminerait des rotations relatives.Conversely, the absolute angular position sensor 8 could be replaced by a relative displacement detector, such as an accelerometer, from the measurements of which the microprocessor 7 would determine relative rotations.

On comprendra que les éléments du système d'alimentation auraient pu avoir des déplacements autres que rotatifs.It will be understood that the elements of the supply system could have displacements other than rotary.

Claims (4)

  1. Combustion gas supply system for an internal combustion engine of a vehicle, comprising, in an inlet manifold (2), an inlet butterfly-valve (1) moving integrally with a shaft (4) of a regulating motor (5) in turn moving integrally with a mechanical control member (10-12) and means (8) for determining the movement of the motor (5), with respect to an inoperative position, under the action of the control member (10-12), the mechanical control member (10-12) directly controlling the movement of the motor (5), characterised by the fact that a microprocessor (7) is provided for cyclically comparing the movement of the motor (5) with a movement threshold (DO) of its shaft (4) and of the butterfly valve (1) in a given space of time (TO) and thus to control the movement of the shaft (4) of the motor (5) and thus of the butterfly valve (1) in order to limit the speed of movement of the shaft (4) by controlling a complementary and progressive movement of the latter.
  2. Supply system according to Claim 1, in which a travel-limitation indicator (15), integral with the shaft (4) of the regulating motor (5), is arranged to move between two stops (16-17) of the casing (6) of the regulating motor (5).
  3. Supply system according to one of Claims 1 and 2, in which the regulating motor (5) is rotary.
  4. Supply system according to one of Claims 1 to 3, in which the regulating motor (5) is a stepping motor.
EP94401676A 1993-07-22 1994-07-21 Combustion gas supply system for the internal combustion engine of a vehicle Expired - Lifetime EP0636775B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9309011 1993-07-22
FR9309011A FR2708045B1 (en) 1993-07-22 1993-07-22 Oxidant gas supply system for a vehicle internal combustion engine.

Publications (2)

Publication Number Publication Date
EP0636775A1 EP0636775A1 (en) 1995-02-01
EP0636775B1 true EP0636775B1 (en) 1999-01-27

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EP94401676A Expired - Lifetime EP0636775B1 (en) 1993-07-22 1994-07-21 Combustion gas supply system for the internal combustion engine of a vehicle

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US (1) US5513611A (en)
EP (1) EP0636775B1 (en)
JP (1) JPH0771275A (en)
DE (1) DE69416212T2 (en)
FR (1) FR2708045B1 (en)

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Publication number Publication date
US5513611A (en) 1996-05-07
FR2708045B1 (en) 1995-09-15
EP0636775A1 (en) 1995-02-01
DE69416212D1 (en) 1999-03-11
DE69416212T2 (en) 1999-08-05
FR2708045A1 (en) 1995-01-27
JPH0771275A (en) 1995-03-14

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