Patent ID: 6244373
Filing Date: 2001-06-12
Classification: B62D

Abstract:
A steering control apparatus for a vehicle, comprising:(A) a transmission ratio varying mechanism capable of varying an amount of angular rotation of an output shaft relative to an amount of angular rotation of an input shaft connected to a steering handle, said transmission ratio varying mechanism connecting with and arranged between said input and output shafts, said transmission ratio varying mechanism including an actuator for varying the transmission ratio when said actuator is driven; and(B) a steering control device that controls the transmission ratio by driving said actuator of said transmission ratio varying mechanism, a real driving speed of said actuator of said transmission ratio varying mechanism being monitored, said steering control device driving said actuator of said transmission ratio varying mechanism so as to make a real driving speed of said transmission ratio varying mechanism a target driving speed, the target driving speed being based on a predetermined transmission ratio and actual rotational speed of said steering handle.