UNITED CONTROL METHOD FOR AGCS AND ESP OF VEHICLE, FOR DECIDING FRICTION FORCE OF ROAD SURFACE BY LOW/HIGH FRICTION JUDGING UNIT

摘要

PURPOSE: A united control method for an AGCS(Active Geometry Control Suspension) and an ESP(Electric Stability Program) of a vehicle is provided to regulate optimally a driving condition according to the road surface by driving the AGCS on the road with high friction and operating the ESP on the road with low friction. CONSTITUTION: A united control method for an AGCS and an ESP of a vehicle is composed of steps for deciding low/high frictional force by an acceleration signal generated as the vehicle inclines toward the side and supplied from a transverse sensor of the vehicle and a vehicle speed signal supplied from a wheel sensor(201); estimating a lateral acceleration value by the vehicle speed and a steering angle signal provided from a steering angle speed sensor by driving an AGCS toe control unit if for high frictional force(202¯205); determining the steering direction of an actuator by the estimated lateral acceleration signal and a steering angle signal supplied from the steering angle sensor and then supplying a stroke control value by deciding the roughness of a road surface(206); and controlling accurately stroke according to the stroke control value(207).