EP0966598B1 - Process for regulating the throttle valve of an internal combustion engine for a motor vehicle - Google Patents

Process for regulating the throttle valve of an internal combustion engine for a motor vehicle Download PDF

Info

Publication number
EP0966598B1
EP0966598B1 EP98912561A EP98912561A EP0966598B1 EP 0966598 B1 EP0966598 B1 EP 0966598B1 EP 98912561 A EP98912561 A EP 98912561A EP 98912561 A EP98912561 A EP 98912561A EP 0966598 B1 EP0966598 B1 EP 0966598B1
Authority
EP
European Patent Office
Prior art keywords
engine
pedal
depression
throttle valve
opening
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
EP98912561A
Other languages
German (de)
French (fr)
Other versions
EP0966598A1 (en
Inventor
Gérard Bubel
Rémi Paillisse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP0966598A1 publication Critical patent/EP0966598A1/en
Application granted granted Critical
Publication of EP0966598B1 publication Critical patent/EP0966598B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02D11/105—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 function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting

Definitions

  • the invention relates to a butterfly control method.
  • a heat engine for a motor vehicle equipped a motorized throttle body with a electronically controlled injection, this control being carried out in particular during the start-up phase.
  • the objective of the invention is to ensure a start vehicle engine immediately, without stalling or flooding, by a correct supply of air-fuel mixture, regardless of depressing the pedal accelerator by the driver.
  • this pedal from which is controlled electronically the throttle body, it causes the opening of the throttle of the air intake circuit, which results in an increase in the admitted air flow in the engine.
  • the invention proposes to prevent the opening of the throttle body whatever the position of the accelerator pedal, during the start-up phase of the engine.
  • the object of the invention is a method of control of the throttle of a heat engine for motor vehicle, injection controlled by a electronic computer, equipped with a throttle body motorized, placed in the air intake circuit of the motor and whose opening is controlled by the electronic computer as a function of sinking of the pedal by the driver of the vehicle, characterized in that it consists in inhibiting the opening of the case butterfly, regardless of depressing the pedal, during the defined engine start-up phase jointly by stopping the vehicle, training of the engine by the starter and driving in the pedal below a predefined dewatering threshold.
  • the invention makes it possible to protect the engine from the revs high on cold start, caused by severe depressing of the accelerator pedal.
  • the invention therefore proposes to inhibit the opening of the Motorized throttle body whose opening is controlled by the electronic engine control computer, opening caused by the driver's action vehicle on the accelerator pedal.
  • the driver does not act directly on the butterfly by modifying the depressing of the pedal, but the position of this pedal, marked with a potentiometer placed under the pedal, delivers a pedal angle information, in degrees, at calculator, which then calculates and applies a setpoint butterfly opening.
  • Figure 1 is a schematic section of a butterfly housing 2, placed in the air intake duct of a heat engine, in which the butterfly 1 can rotate about a central axis ⁇ so as to pass a variable amount of air.
  • the throttle valve is opened by an absolute angle ⁇ , defined from an initial position ⁇ 0 perpendicular to the axis of the intake duct, this angle ⁇ varying between two mechanical stops which make an angle ⁇ min and ⁇ max respectively. with ⁇ 0 .
  • the throttle opening setpoint must be fixed at a determined C RR value, to ensure idle speed regulation around a stable setpoint value.
  • Figure 2 is the variation curve of the opening setpoint C BP of the throttle body due to the depressing of the accelerator pedal by the driver as a function of the angle ⁇ P of the pedal in degrees, reflecting this depressing .
  • the engine control method according to the invention consists in maintaining the valve BP opening setpoint C BP at zero, whatever the action of the driver on the pedal, until the engine starts.
  • the solid line curve which is, according to the invention, the curve for variation of the opening setpoint C BP of the throttle valve has a zero value from the initial instant t 0 until the engine starts at l 'instant t d .
  • the accelerator pedal which is depressed at an angle ⁇ pd , regains its authority over the throttle and the curve of C BP becomes a straight line reflecting the gradual recovery of the angle ⁇ p of the pedal.
  • the curve goes up to a maximum value of the opening ⁇ max for maximum depressing of the pedal, "foot to the bottom".
  • Engine start-up is considered to have been reached at time t d when its speed is above a threshold set by calibration and when it actually turns in autorotation for a duration also greater than a calibratable threshold.
  • the accelerator pedal regains its authority over the opening of the throttle valve.
  • the return to full authority of the pedal is gradual to give the driver time to raise the foot, if he had depressed the pedal, and avoid too great a speed boost corresponding to the depressing of the pedal causing a high flow air in the manifold.
  • This progressiveness is ensured by a percentage applied to the angle ⁇ P of the pedal which increases from 0 to 100% as soon as one of the conditions for applying the opening ban is no longer satisfied.
  • FIG. 3 is the curve for variation of the opening setpoint C BP of the butterfly valve during the start-up phase, according to the control method of the invention.
  • the opening setpoint C BP of the butterfly valve is zero whatever the value of the angle ⁇ P of the pedal sent to the computer as a function of the depressing of the pedal by the driver, except in the case of stepping on the pedal to the floor to dewater the engine.
  • the opening setpoint C BP gradually increases, in a linear fashion until reaching the value corresponding to the depressing of the accelerator pedal which then regains all of its authority over the throttle .
  • the instant t r corresponds to a reading of the driver's foot, which causes the pedal to rise to its neutral position.
  • the curve in solid lines is the curve for variation of the engine speed N and the curve in dashed lines is the curve for variation of the depressing E p of the pedal.
  • the invention has the advantage of maintaining zero the throttle opening caused by the driver until the engine has started, precisely so as not to disturb it, and to give however, the driver can open the butterfly on strong pedal depressions, in the goal of reaching the dewatering area associated with the injection cut-off.

Landscapes

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

Description

L'invention concerne un procédé de contrôle du papillon d'un moteur thermique pour véhicule automobile, équipé d'un boítier papillon des gaz motorisé et possédant une injection commandée électroniquement, ce contrôle étant effectué en particulier lors de la phase de démarrage.The invention relates to a butterfly control method. a heat engine for a motor vehicle, equipped a motorized throttle body with a electronically controlled injection, this control being carried out in particular during the start-up phase.

L'objectif de l'invention est d'assurer un démarrage immédiat du moteur d'un véhicule, sans calage ni noyage, par une alimentation correcte en mélange air-essence, indépendamment de l'enfoncement de la pédale d'accélérateur par le conducteur. Lorsque ce dernier enfonce cette pédale, à partir de laquelle est commandé électroniquement le boítier papillon, il provoque l'ouverture du papillon du circuit d'admission d'air, ce qui entraíne une augmentation du débit d'air admis dans le moteur.The objective of the invention is to ensure a start vehicle engine immediately, without stalling or flooding, by a correct supply of air-fuel mixture, regardless of depressing the pedal accelerator by the driver. When the latter depress this pedal, from which is controlled electronically the throttle body, it causes the opening of the throttle of the air intake circuit, which results in an increase in the admitted air flow in the engine.

Dans le cas d'une injection commandée par un calculateur électronique, selon une loi de commande établie par cartographie à partir du régime du moteur et de la pression dans le collecteur, l'ouverture du papillon génère une augmentation du débit d'air, qui désadapte la richesse du mélange air-essence pendant la phase de démarrage. Cette désadaptation de la richesse peut provoquer entre autres des calages du moteur.In the case of an injection ordered by a electronic calculator, according to a control law established by mapping from engine speed and pressure in the manifold, opening the butterfly generates an increase in air flow, which mismatch the richness of the air-fuel mixture during the Beginning phase. This mismatch of wealth can cause engine stalls, among other things.

Actuellement, la solution à ce problème est la préconisation du constructeur, sur le manuel d'utilisation du véhicule, invitant le client à démarrer sans toucher la pédale d'accélérateur. Par expérience, cette solution n'est pas fiable.Currently, the solution to this problem is manufacturer's recommendation, in the manual of vehicle use, inviting the customer to start without touching the accelerator pedal. Through experience, this solution is not reliable.

Pour résoudre ce problème de manière parfaitement fiable, l'invention propose d'empêcher l'ouverture du boítier papillon quelle que soit la position de la pédale d'accélérateur, pendant la phase de démarrage du moteur.To solve this problem perfectly reliable, the invention proposes to prevent the opening of the throttle body whatever the position of the accelerator pedal, during the start-up phase of the engine.

Pour cela, l'objet de l'invention est un procédé de contrôle du papillon d'un moteur thermique pour véhicule automobile, à injection commandée par un calculateur électronique, équipé d'un boítier papillon motorisé, placé dans le circuit d'admission d'air du moteur et dont l'ouverture est pilotée par le calculateur électronique en fonction de l'enfoncement de la pédale par le conducteur du véhicule, caractérisé en ce qu'il consiste à inhiber l'ouverture du boítier papillon, quel que soit l'enfoncement de la pédale, pendant la phase de démarrage du moteur définie conjointement par l'arrêt du véhicule, l'entraínement du moteur par le démarreur et l'enfoncement de la pédale au-dessous d'un seuil de dénoyage prédéfini.For this, the object of the invention is a method of control of the throttle of a heat engine for motor vehicle, injection controlled by a electronic computer, equipped with a throttle body motorized, placed in the air intake circuit of the motor and whose opening is controlled by the electronic computer as a function of sinking of the pedal by the driver of the vehicle, characterized in that it consists in inhibiting the opening of the case butterfly, regardless of depressing the pedal, during the defined engine start-up phase jointly by stopping the vehicle, training of the engine by the starter and driving in the pedal below a predefined dewatering threshold.

En plus de la protection contre les calages, l'invention permet de protéger le moteur des régimes élevés en départ à froid, occasionnés par un enfoncement important de la pédale d'accélérateur.In addition to stall protection, the invention makes it possible to protect the engine from the revs high on cold start, caused by severe depressing of the accelerator pedal.

D'autres caractéristiques et avantages de l'invention apparaítront à la lecture de la description du procédé, faite en relation avec les dessins joints dans lesquels :

  • la figure 1 est une coupe schématique d'un boítier papillon motorisé placé dans un circuit d'admission d'air d'un moteur ;
  • la figure 2 est la courbe de variation de la consigne d'ouverture du papillon en fonction de l'information délivrée par la pédale d'accélérateur ;
  • la figure 3 est la courbe de variation de la consigne d'ouverture du papillon pendant le démarrage, selon l'invention.
Other characteristics and advantages of the invention will appear on reading the description of the process, made in relation to the accompanying drawings in which:
  • Figure 1 is a schematic section of a motorized throttle body placed in an air intake circuit of an engine;
  • FIG. 2 is the curve for varying the throttle opening setpoint as a function of the information delivered by the accelerator pedal;
  • Figure 3 is the variation curve of the throttle opening setpoint during startup, according to the invention.

Dans le cas d'un moteur à combustion interne dont l'injection d'essence est pilotée par un calculateur électronique, en fonction de calibrations du régime moteur N et de la pression dans le collecteur, il est recommandé de ne pas toucher la pédale d'accélérateur pendant la phase de démarrage pour ne pas ouvrir le papillon. En effet, son ouverture engendre une augmentation du débit d'air provoquant une désadaptation de la richesse du mélange élaborée par le calculateur électronique.In the case of an internal combustion engine of which fuel injection is controlled by a computer electronic, depending on speed calibrations motor N and the pressure in the manifold it is recommended not to touch the accelerator pedal during the start-up phase so as not to open the butterfly. Indeed, its opening generates a increased air flow causing mismatch of the richness of the mixture produced by the electronic calculator.

L'invention propose donc d'inhiber l'ouverture du boítier papillon motorisé dont l'ouverture est pilotée par le calculateur électronique de contrôle du moteur, ouverture provoquée par l'action du conducteur du véhicule sur la pédale d'accélérateur. Avec un tel boítier, le conducteur n'agit pas directement sur le papillon en modifiant l'enfoncement de la pédale, mais la position de cette pédale, repérée par un potentiomètre placé sous la pédale, délivre une information d'angle de la pédale, en degrés, au calculateur, qui calcule et applique alors une consigne d'ouverture du papillon. The invention therefore proposes to inhibit the opening of the Motorized throttle body whose opening is controlled by the electronic engine control computer, opening caused by the driver's action vehicle on the accelerator pedal. With such the driver does not act directly on the butterfly by modifying the depressing of the pedal, but the position of this pedal, marked with a potentiometer placed under the pedal, delivers a pedal angle information, in degrees, at calculator, which then calculates and applies a setpoint butterfly opening.

La figure 1 est une coupe schématique d'un boítier papillon 2, placé dans le conduit d'admission d'air d'un moteur thermique, dans lequel le papillon 1 peut tourner autour d'un axe central δ de façon à laisser passer une quantité variable d'air. Le papillon est ouvert d'un angle absolu α, défini à partir d'une position initiale α0 perpendiculaire à l'axe du conduit d'admission, cet angle α variant entre deux butées mécaniques qui font un angle αmin et αmax respectivement avec α0.Figure 1 is a schematic section of a butterfly housing 2, placed in the air intake duct of a heat engine, in which the butterfly 1 can rotate about a central axis δ so as to pass a variable amount of air. The throttle valve is opened by an absolute angle α, defined from an initial position α 0 perpendicular to the axis of the intake duct, this angle α varying between two mechanical stops which make an angle α min and α max respectively. with α 0 .

En phase de régulation de ralenti du moteur, la consigne d'ouverture du papillon doit être fixée à une valeur CRR déterminée, pour assurer la régulation du régime au ralenti autour d'une valeur de consigne stable. Ainsi, le conducteur ouvre le boítier papillon d'un angle correspondant à la consigne d'ouverture CBP, qui varie dans la plage des valeurs allant de l'angle CRR pour la régulation du ralenti à l'angle maximum αmax, de sorte que la consigne absolue C d'ouverture du boítier papillon est égale à la somme des consignes CRR et CBP : C = CRR + CBP During the engine idling control phase, the throttle opening setpoint must be fixed at a determined C RR value, to ensure idle speed regulation around a stable setpoint value. Thus, the driver opens the throttle body by an angle corresponding to the opening setpoint C BP , which varies in the range of values from the angle C RR for regulating the idle to the maximum angle α max , from so that the absolute setpoint C for opening the throttle body is equal to the sum of the setpoints C RR and C BP : C = C RR + C BP

La figure 2 est la courbe de variation de la consigne d'ouverture CBP du boítier papillon due à l'enfoncement de la pédale d'accélérateur par le conducteur en fonction de l'angle αP de la pédale en degrés, traduisant cet enfoncement. En l'absence du procédé de contrôle selon l'invention, c'est une droite, dessinée en traits pointillés, traduisant la proportionnalité entre l'ouverture du boítier papillon et l'enfoncement de la pédale se traduisant par la consigne obtenue. Le procédé de contrôle du moteur selon l'invention consiste à maintenir à une valeur nulle la consigne d'ouverture CBP du papillon, quelle que soit l'action du conducteur sur la pédale, jusqu'au démarrage du moteur.Figure 2 is the variation curve of the opening setpoint C BP of the throttle body due to the depressing of the accelerator pedal by the driver as a function of the angle α P of the pedal in degrees, reflecting this depressing . In the absence of the control method according to the invention, it is a straight line, drawn in dotted lines, reflecting the proportionality between the opening of the throttle body and the depressing of the pedal resulting in the setpoint obtained. The engine control method according to the invention consists in maintaining the valve BP opening setpoint C BP at zero, whatever the action of the driver on the pedal, until the engine starts.

Cette inhibition de la consigne d'ouverture CBP, par le client, du boítier papillon est rendue possible grâce au boítier papillon motorisé, qui permet de désolidariser totalement la pédale d'accélérateur du papillon des gaz.This inhibition of the opening instruction C BP , by the customer, of the throttle body is made possible thanks to the motorized throttle body, which makes it possible to completely separate the accelerator pedal from the throttle valve.

C'est pourquoi la courbe en trait plein qui est, selon l'invention, la courbe de variation de la consigne d'ouverture CBP du papillon a une valeur nulle de l'instant initial t0 jusqu'au démarrage du moteur à l'instant td. A partir du démarrage, la pédale d'accélérateur, qui est enfoncée alors d'un angle αpd, retrouve son autorité sur le papillon et la courbe de CBP devient une droite traduisant la reprise en compte progressive de l'angle αp de la pédale. Dans le cas particulier décrit sur cette figure, la courbe va jusqu'à une valeur maximale de l'ouverture αmax pour un enfoncement maximum de la pédale, "pied à fond".This is why the solid line curve which is, according to the invention, the curve for variation of the opening setpoint C BP of the throttle valve has a zero value from the initial instant t 0 until the engine starts at l 'instant t d . From start-up, the accelerator pedal, which is depressed at an angle α pd , regains its authority over the throttle and the curve of C BP becomes a straight line reflecting the gradual recovery of the angle α p of the pedal. In the particular case described in this figure, the curve goes up to a maximum value of the opening α max for maximum depressing of the pedal, "foot to the bottom".

Le démarrage du moteur est considéré comme atteint à l'instant td quand son régime est supérieur à un seuil fixé par calibration et qu'il tourne effectivement en autorotation depuis une durée supérieure aussi à un seuil calibrable.Engine start-up is considered to have been reached at time t d when its speed is above a threshold set by calibration and when it actually turns in autorotation for a duration also greater than a calibratable threshold.

Les conditions d'inhibition de l'ouverture du papillon par l'action du conducteur sont les suivantes :

  • le véhicule doit être arrêté ;
  • le moteur est entraíné par le démarreur et lui seul après la mise sous contact ;
  • la consigne pédale délivrée au calculateur électronique, en fonction de l'enfoncement réel de la pédale d'accélérateur par le conducteur, doit être inférieure à un seuil dit de dénoyage.
The conditions for inhibiting the opening of the throttle valve by the driver's action are as follows:
  • the vehicle must be stopped;
  • the engine is driven by the starter and only after ignition;
  • the pedal setpoint delivered to the electronic computer, as a function of the actual depressing of the accelerator pedal by the driver, must be less than a so-called dewatering threshold.

Cette dernière condition signifie, qu'en cas de noyage du moteur, le conducteur est informé qu'il est nécessaire, pour dénoyer le moteur, d'enfoncer à fond la pédale d'accélérateur, ce qui entraíne la coupure de l'injection électronique du carburant.
Cette possibilité de dénoyage doit être maintenue pour le conducteur, de sorte que le papillon doit pouvoir être ouvert en cas d'enfoncement maximum de la pédale d'accélérateur.This last condition means that in case of drowning of the engine, the driver is informed that it is necessary, to drown the engine, to depress the accelerator pedal fully, which causes the cut of the electronic injection fuel.
This possibility of dewatering must be maintained for the driver, so that the throttle must be able to be opened in the event of maximum depressing of the accelerator pedal.

Le moteur est considéré comme entraíné par le démarreur si les deux observations suivantes sont vraies simultanément :

  • le régime moteur est inférieur à un seuil calibrable, de l'ordre de 300 tours/minute par exemple. Au delà de ce seuil, il est en autorotation ;
  • le moteur est en autorotation depuis une durée inférieure à un seuil calibrable, de l'ordre de quelques secondes.
The engine is considered to be driven by the starter if the following two observations are true simultaneously:
  • the engine speed is below a calibratable threshold, of the order of 300 revolutions / minute for example. Beyond this threshold, it is in autorotation;
  • the engine has been in autorotation for a duration below a calibratable threshold, of the order of a few seconds.

Dès qu'une des conditions citées auparavant n'est plus remplie, la pédale d'accélérateur retrouve son autorité sur l'ouverture du papillon des gaz. Le retour à la pleine autorité de la pédale est progressif pour laisser au conducteur le temps de relever le pied, s'il avait enfoncé la pédale, et éviter une trop forte envolée de régime correspondant à l'enfoncement de la pédale provoquant un fort débit d'air dans le collecteur. Cette progressivité est assurée par un pourcentage appliqué à l'angle αP de la pédale qui croít de 0 à 100 % dès qu'une des conditions d'application de l'interdiction d'ouverture n'est plus satisfaite. Dans ce cas, la consigne d'ouverture CBP du papillon peut être égale au produit de l'angle αP de la pédale, transmis au calculateur électronique à partir de l'enfoncement de la pédale voulu par le conducteur, multiplié par un pourcentage x% variant de 0 à 100 % selon l'équation CBP = α*x%. Selon une variante de calcul, la consigne d'ouverture peut être égale au produit précédent divisé par la valeur maximale αmax de l'ouverture du papillon, dans le but de formater cet angle, selon l'équation suivante : CBP = [αP * x %]/αmax. As soon as one of the conditions mentioned above is no longer met, the accelerator pedal regains its authority over the opening of the throttle valve. The return to full authority of the pedal is gradual to give the driver time to raise the foot, if he had depressed the pedal, and avoid too great a speed boost corresponding to the depressing of the pedal causing a high flow air in the manifold. This progressiveness is ensured by a percentage applied to the angle α P of the pedal which increases from 0 to 100% as soon as one of the conditions for applying the opening ban is no longer satisfied. In this case, the opening instruction C BP of the butterfly valve can be equal to the product of the angle α P of the pedal, transmitted to the electronic computer from the depressing of the pedal desired by the driver, multiplied by a percentage x% varying from 0 to 100% according to the equation C BP = α * x%. According to a variant of calculation, the opening setpoint can be equal to the previous product divided by the maximum value α max of the opening of the butterfly, in order to format this angle, according to the following equation: VS BP = [α P * x%] / α max .

La figure 3 est la courbe de variation de la consigne d'ouverture CBP du papillon pendant la phase de démarrage, selon le procédé de contrôle de l'invention. Entre l'instant initial t0 et l'instant td où le moteur est considéré comme étant en autorotation, la consigne d'ouverture CBP du papillon est nulle quelle que soit la valeur de l'angle αP de la pédale envoyée au calculateur en fonction de l'enfoncement de la pédale par le conducteur, sauf en cas de pied à fond sur la pédale pour dénoyer le moteur.FIG. 3 is the curve for variation of the opening setpoint C BP of the butterfly valve during the start-up phase, according to the control method of the invention. Between the initial instant t 0 and the instant t d when the engine is considered to be in autorotation, the opening setpoint C BP of the butterfly valve is zero whatever the value of the angle α P of the pedal sent to the computer as a function of the depressing of the pedal by the driver, except in the case of stepping on the pedal to the floor to dewater the engine.

Au delà de l'instant td, la consigne d'ouverture CBP progressivement augmente, de façon linéaire jusqu'à atteindre la valeur correspondant à l'enfoncement de la pédale d'accélérateur qui retrouve alors la totalité de son autorité sur le papillon. L'instant tr correspond à un relevé du pied du conducteur, qui entraíne une remontée de la pédale à sa position neutre. La courbe en trait plein est la courbe de variation du régime N du moteur et la courbe en traits interrompus est la courbe de variation de l'enfoncement Ep de la pédale.Beyond the instant t d , the opening setpoint C BP gradually increases, in a linear fashion until reaching the value corresponding to the depressing of the accelerator pedal which then regains all of its authority over the throttle . The instant t r corresponds to a reading of the driver's foot, which causes the pedal to rise to its neutral position. The curve in solid lines is the curve for variation of the engine speed N and the curve in dashed lines is the curve for variation of the depressing E p of the pedal.

Ainsi, l'invention a pour avantage de maintenir nulle l'ouverture du papillon provoquée par le conducteur tant que le démarrage du moteur ne s'est pas produit, afin précisément de ne pas le perturber, et de donner cependant au conducteur la possibilité d'ouvrir le papillon sur des forts enfoncements de pédale, dans le but d'atteindre la zone de dénoyage associée à la coupure d'injection.Thus, the invention has the advantage of maintaining zero the throttle opening caused by the driver until the engine has started, precisely so as not to disturb it, and to give however, the driver can open the butterfly on strong pedal depressions, in the goal of reaching the dewatering area associated with the injection cut-off.

Claims (5)

  1. A method for the control of the throttle valve of a thermal engine for a motor vehicle, with injection controlled by an electronic computer, equipped with a motor-driven throttle valve housing (2) disposed in the air intake circuit, whose opening is driven by the electronic computer as a function of the depression of the accelerator pedal by the vehicle driver, characterised in that it consists in inhibiting the opening command (CBP) of the throttle valve housing as a result of the depression of the pedal, whatever this depression, during the starting phase of the engine defined jointly by the stoppage of the vehicle, the actuation of the engine by the starter and the depression of the pedal below a predetermined depression threshold, such that the absolute command (C ) for the opening of the throttle valve housing supplied by the electronic computer, which is the sum of the opening command (CRR) during regulation of the engine idling speed and the command (CBP) due to the depression of the pedal, is equal to the command (CRR) during regulation of idling up to the starting of the engine.
  2. A control method as claimed in claim 1, characterised in that the condition of actuation of the engine by the starter is satisfied if the following two events are verified:
    the engine speed (N) is lower than a threshold which can be calibrated, beyond which the engine is in auto-rotation;
    the engine is in auto-rotation for a period lower than a threshold that can be calibrated.
  3. A control method as claimed in claim 2, characterised in that the maximum depression of the accelerator pedal cancels out the inhibition of the opening of the throttle valve housing, enabling the intake of air into the manifold before the instant (td) of starting of the engine.
  4. A control method as claimed in claim 3, characterised in that the throttle valve opening command (CBP) due to the depression (Ep) of the accelerator pedal by the driver is equal to the product of the angle (αp) of the pedal, transmitted to the electronic computer from the depression (Ep) of the pedal, multiplied by a percentage (x%) varying from 0 to 100, according to the equation: CBP = αp * x%.
  5. A control method as claimed in claim 3, characterised in that the throttle valve opening command (CBP) due to the depression (Ep) of the accelerator pedal by the driver is equal to the product of the angle (αp) of the pedal, transmitted to the electronic computer from the depression (Ep) of the pedal, multiplied by a percentage (x%) varying from 0 to 100, divided by the maximum value (αmax) of the opening of the throttle valve: CBP = (αp * x%)/ αmax.
EP98912561A 1997-03-07 1998-02-27 Process for regulating the throttle valve of an internal combustion engine for a motor vehicle Expired - Lifetime EP0966598B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9702768 1997-03-07
FR9702768A FR2760488B1 (en) 1997-03-07 1997-03-07 METHOD FOR CONTROLLING THE BUTTERFLY OF A HEAT ENGINE FOR A MOTOR VEHICLE
PCT/FR1998/000385 WO1998040616A1 (en) 1997-03-07 1998-02-27 Process for regulating the throttle valve of an internal combustion engine for a motor vehicle

Publications (2)

Publication Number Publication Date
EP0966598A1 EP0966598A1 (en) 1999-12-29
EP0966598B1 true EP0966598B1 (en) 2002-05-15

Family

ID=9504537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98912561A Expired - Lifetime EP0966598B1 (en) 1997-03-07 1998-02-27 Process for regulating the throttle valve of an internal combustion engine for a motor vehicle

Country Status (4)

Country Link
EP (1) EP0966598B1 (en)
DE (1) DE69805400T2 (en)
FR (1) FR2760488B1 (en)
WO (1) WO1998040616A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63150445A (en) * 1986-12-12 1988-06-23 Nippon Denso Co Ltd Throttle valve control device for internal combustion engine
JPH0633726B2 (en) * 1986-12-16 1994-05-02 いすゞ自動車株式会社 Composite piston and method of manufacturing the same
DE3924582C2 (en) * 1988-07-25 1995-02-09 Nissan Motor Throttle valve control device for wheel slip suppression in motor vehicles
JP3044914B2 (en) * 1992-05-07 2000-05-22 国産電機株式会社 Internal combustion engine control device
DE4411531B4 (en) * 1994-04-02 2004-08-19 Robert Bosch Gmbh Method and device for controlling an actuator of a drive unit in a vehicle
JPH08193531A (en) * 1995-01-17 1996-07-30 Nippondenso Co Ltd Control system of hybrid vehicle
DE19510747B4 (en) * 1995-03-24 2008-06-19 Robert Bosch Gmbh System and adjusting device for controlling the power of an internal combustion engine
JP3561065B2 (en) * 1995-12-01 2004-09-02 日立建機株式会社 Motor control unit

Also Published As

Publication number Publication date
FR2760488A1 (en) 1998-09-11
FR2760488B1 (en) 1999-06-04
WO1998040616A1 (en) 1998-09-17
DE69805400T2 (en) 2002-12-12
DE69805400D1 (en) 2002-06-20
EP0966598A1 (en) 1999-12-29

Similar Documents

Publication Publication Date Title
US7458915B2 (en) Leisure vehicle
JPS6153544B2 (en)
BRPI1100818A2 (en) general purpose engine air / fuel ratio control apparatus
US5507265A (en) Compensation method and apparatus for fuel injection amount during engine warm-up
JPS6342106B2 (en)
EP0170595B1 (en) Carbureter with an automatic choking device
US20090271097A1 (en) Control apparatus for general-purpose engine
FR2551798A1 (en) METHOD FOR CONTROLLING THE FUEL SUPPLY OF AN INTERNAL COMBUSTION ENGINE IMMEDIATELY AFTER STARTING
JPH0236774B2 (en)
FR2826405A1 (en) Fuel quality evaluation method, for internal combustion engine, uses evaluation of temperature drop at temperature sensor in path of injected fuel
JPS6328221B2 (en)
FR2541728A1 (en) METHOD FOR ADJUSTING IDLE REACTION IN AN INTERNAL COMBUSTION ENGINE
EP0966598B1 (en) Process for regulating the throttle valve of an internal combustion engine for a motor vehicle
FR2553829A1 (en) METHOD FOR ADJUSTING A QUANTITY INVOLVED IN THE OPERATION OF AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR THE FUEL QUANTITY
EP1835154B1 (en) Electronic control, system for carburettor-supplied, controlled-ignition, internal-combustion engines
EP0694121B1 (en) Method for controlling an internal combustion engine as it switches to idling speed
FR2903737A1 (en) Internal combustion engine managing method for motor vehicle, involves determining torque delivered to output of clutch, comparing torque with threshold value, and activating starting regulator to start vehicle, when torque reaches value
FR2541727A1 (en) METHOD AND DEVICE FOR CONTROLLING THE VACUUM ROTATION SPEED OF A COMMAND-IGNITION ENGINE WITH INTERMITTENT OPERATING ACCESSORIES
JP2014013015A (en) Engine system
EP0156670B1 (en) Carburation system for an engine
JP2003027992A (en) Intake control system for internal combustion engine
JP3772921B2 (en) Idle speed control device for internal combustion engine
FR2713718A1 (en) Multipoint injectors with air and electronic control valve
FR2670533A1 (en) METHOD AND DEVICE FOR ADJUSTING IDLING AIR REGULATOR
JP3425757B2 (en) Engine speed control device for internal combustion engine

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990809

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES GB IT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20010704

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES GB IT

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20020515

Ref country code: GB

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

Effective date: 20020515

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 69805400

Country of ref document: DE

Date of ref document: 20020620

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: RENAULT S.A.S.

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20020515

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

Ref country code: ES

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

Effective date: 20021128

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed

Effective date: 20030218

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

Ref country code: DE

Payment date: 20160218

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69805400

Country of ref document: DE

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

Ref country code: DE

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

Effective date: 20170901