PROCEDE DE REGLAGE A REACTION DE LA VITESSE DE RALENTI POUR MOTEURS A COMBUSTION INTERNE, NOTAMMENT DE VEHICULES AUTOMOBILES

CE PROCEDE UTILISE UN PASSAGE D'AIR 8 QUI DEBOUCHE DANS LA TUYAUTERIE D'ADMISSION 3 D'UN MOTEUR A COMBUSTION INTERNE 1 D'UN VEHICULE POUR ALIMENTER CE MOTEUR EN AIR SUPPLEMENTAIRE LORS DE LA DECELERATION JUSQUE SOUS UNE VITESSE DETERMINEE ET AU RALENTI, AFIN D'EVITER LE CALAGE DU MOTEUR, NOTAMMENT EN ALTITUDE. LE REGLAGE DU DEBIT D'AIR SUPPLEMENTAIRE S'EFFECTUE AU MOYEN D'UNE SOUPAPE 6 COMMANDEE PAR UN APPAREIL ELECTRONIQUE 5 QUI RECOIT LES SIGNAUX DE DIFFERENTS CAPTEURS 17, 12, 13, 14, 16, 18 POUR DETERMINER LES PARAMETRES DE FONCTIONNEMENT DU MOTEUR ET NOTAMMENT AUSSI LA PRESSION ATMOSPHERIQUE AMBIANTE PA ET QUI COMMANDE EGALEMENT LES INJECTEURS DE CARBURANT 10 DU MOTEUR. A method of controlling a control valve that regulates the quantity of supplementary air being supplied to an internal combustion engine, in a feedback manner responsive to the difference between actual engine rpm and desired idling rpm at idling of the engine. During deceleration of the engine, the control valve is controlled so as to supply the engine with supplementary air at a volumetric flow rate dependent upon a detected value of ambient atmospheric pressure, after the engine has been determined to be in a predetermined operating condition and until the above feedback control is initiated. Preferably, the volumetric flow rate of the supplementary air quantity is set to larger values as the detected value of the atmospheric pressure decreases. The engine is determined to be in the above predetermined operating condition when at least one of conditions is satisfied that the actual engine rpm is smaller than a predetermined value larger than the desired idling rpm, and that the output shaft of the engine is not in engagement with a driven shaft driven by the engine.