PROCEDE ET CIRCUIT POUR FORMER UN SIGNAL DE VITESSE DE REFERENCE POUR UN SYSTEME ANTIBLOCAGE DE FREINS DE VEHICULE

• Main Author: HANS WILHELM BLECKMANN ET HEINZ LORECK
• Format: Patent
• Language: French
• Published: 26.06.1981
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL

L'INVENTION CONCERNE UN PROCEDE ET UN CIRCUIT POUR FORMER UN SIGNAL DE VITESSE DE REFERENCE POUR UN SYSTEME ANTIBLOCAGE DE FREINS DE VEHICULE.CE CIRCUIT PERMET UNE COMPARAISON D'UN SIGNAL DE VITESSE DE REFERENCE CONTENU DANS UNE MEMOIRE 8 AVEC LES SIGNAUX DE VITESSE INSTANTANEE DE CHAQUE ROUE APPLIQUES A UN MULTIPLEXEUR 2 ET UNE PONDERATION DES RESULTATS DE COMPARAISON SUIVANT QUE LA ROUE CONSIDEREE EST MOTRICE OU NON. LES SIGNAUX DE VITESSE INSTANTANEE SONT APPLIQUES PAR LE MULTIPLEXEUR 2 A UN COMPARATEUR 6 SUIVI D'UN CIRCUIT DE PONDERATION 10 ET D'UN CIRCUIT CORRECTEUR 13 QUI COMMANDE LA MODIFICATION CORRESPONDANTE DU SIGNAL DE VITESSE DE REFERENCE DANS LA MEMOIRE 8.L'INVENTION S'APPLIQUE AUX SYSTEMES ANTIBLOCAGE POUR FREINS DE VEHICULES AUTOMOBILES. It is known that a vehicle speed reference signal suitable for slip control can be obtained by fully releasing the braking force at one or more vehicle wheels intermittently and to obtain the true vehicle speed from the signal provided by the free-rotating wheels. However, this technique results in the stopping distance of the vehicle being longer than desired since the braking effectiveness is considerably reduced. To avoid this disadvantage, the present invention compares a speed reference signal cyclically with the instantaneous velocity signals of the wheels and to weight the comparison result dependent on whether the instantaneous velocity signal comes from a driven wheel or a non-driven wheel. The weighted comparison result provides a correcting factor for the speed reference signal.