Apparatus for detecting step-out of suspension control system

摘要

The presence or absence of any step-out of an actuator which is used to adjust a damping factor is made always detectable without additional provision of any special sensor such as a position encoder. Based on an equation of motion of a suspension, an estimated acceleration Gp derived from a detected vehicle height Sh and its differential Vr, and an actual acceleration Sg detected by an acceleration sensor, a deviation DELTA G is derived and compared against a threshold A. If the magnitude of the deviation is high, the occurrence of the step-out is declared after a given time interval T0. Upon detecting the occurrence of the step-out, the actuator position is returned to its home position, and the value in the position register is initialized. A skyhook control of the suspension is performed.