Abstract: A wheel alignment control method for a motor vehicle and a control apparatus therefor in which every time a vehicle drive state, steering history, and high-speed steering-hold mode are discriminated by sensor outputs, a processor determines target values of a caster angle, camber angle, and toe angle in accordance with inference outputs computed by fuzzy inference based on fuzzy rules, corresponding individually to a plurality of vehicle drive modes, steering modes, and high-speed steering-hold mode, and discrimination results. Operating sections adjust the camber and the like by means of a driver circuit which responds to the processor outputs. Thus, a fine adjustment for alignment is made, and wheel alignment adaptable to the vehicle drive modes and the like is established.

Abstract: Operation amounts of actuators are controlled in response to a steering wheel angle .theta.h, a steering wheel angular velocity .theta.hs, and a road surface .mu., in addition to a vehicle speed Vel, to change a caster angle. The caster angle is increased to increase a righting moment of vehicle wheels during steering. The caster angle is increased according to the vehicle speed Vel in non-steering and initial steering conditions, to stabilize the vehicle. This thereby improves the vehicle stability in normal and transitional conditions.

Abstract: In an actuator structure of a vehicle suspension apparatus, an operation rod of an actuator is swingably connected to a vehicle body side end of a lower suspension arm through a rubber bushing, the operation rod is contained in a body and is slidable in a longitudinal direction of the lower suspension arm, and the body is mounted on a vehicle body through a rubber mount, thereby improving durability, environmental resistance, and mounting workability of the actuator structure.

Abstract: An alignment control unit and method for an automotive suspension are provided in which a basic control amount is determined in accordance with a detected steering angle, and the alignment is controlled in accordance with a product value obtained by multiplying the determined basic control amount by a control gain. The control gain may be set such that an actual control amount of an actuator is changed to be increased when the detected steering angle exceeds a specified value or may be set in accordance with a detected lateral acceleration such that it increases as the lateral acceleration increases. The toe angle or camber angle of a wheel may be controlled in accordance with the basic control amount.