Patent ID: 6718242
Filing Date: 2004-04-06
Classification: B62D

Abstract:
A vehicular steering device comprising:a variable transfer-ratio unit for changing a transfer ratio between a steering angle of a steering handle and a turning angle of a turning wheel; an electric motor for driving the variable transfer-ratio unit; and lock unit for making a shift between a locked state in which relative rotation of the electric motor is stopped and an unlocked state in which the electric motor is released, wherein the lock unit comprises a stopper member for stopping relative rotation of the electric motor, an urging member for urging the stopper member such that the stopper member stops the electric motor, a solenoid for releasing the electric motor by driving the stopper member against an urging force of the urging member, and a control unit for controlling a voltage applied to the solenoid, and wherein, after the electric motor has been released and has assumed the unlocked state, the control unit intermittently applies a voltage to the solenoid so as to maintain the electric motor in the unlocked state.