SYSTEM AND METHOD FOR CONTROLLING VEHICLE SPEED

• Main Authors: FONKALSRUD, ANDREW, O, STRASHNY, IGOR
• Format: Patent
• Language: English; French
• Published: 06.03.2008
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; VEHICLES IN GENERAL

A system (24) is provided for controlling the speed of a vehicle (10) having a power plant (12) and a transmission (14). A control unit (26) is configured to receive a signal indicative of the speed of the vehicle. The control unit is further configured to determine a desired output speed of the power plant based on the signal indicative of the speed of the vehicle, a signal indicative of the gear ratio of the transmission, and a desired vehicle speed associated with the gear ratio. The control unit is also configured to send a signal to the power plant, such that power plant operates at an output speed that substantially maintains the desired vehicle speed in a manner substantially independent of a magnitude of load on the power plant. L'invention concerne un système (24) permettant de réguler la vitesse d'un véhicule (10) comprenant un groupe motopropulseur (12) et une transmission (14). Ce système (24) comprend une unité de régulation (26) conçue pour recevoir un signal indiquant la vitesse du véhicule. Cette unité de régulation est également conçue pour déterminer le régime désiré pour le groupe motopropulseur sur la base du signal indiquant la vitesse du véhicule, d'un signal indiquant le rapport de la transmission, et d'une vitesse désirée pour le véhicule associée au rapport. L'unité de régulation est également conçue pour envoyer un signal au groupe motopropulseur, afin que ce dernier fonctionne à un régime permettant au véhicule de maintenir une vitesse sensiblement constante indépendamment de la charge du groupe motopropulseur.