POWER STEERING DEVICE FOR VEHICLE

PROBLEM TO BE SOLVED: To provide a power steering device for a vehicle certainly reducing that reaction force torque by driving of a steering angle ratio variable electric motor is transmitted to a steering wheel without using an electric power steering device. SOLUTION: A reaction force reduction actuator 2 comprising an electric motor is provided between a steering angle ratio variable actuator 3 and the steering wheel 1. Further, the steering angle ratio variable actuator 3 calculates reaction force torque Tr generated by steering angle ratio variable driving. Then, torque (reaction force reduction torque) Td for reducing the reaction force torque Tr by the reaction force reduction actuator 2 is calculated based on the reaction force torque Tr. Then, it is controlled such that the reaction force reduction actuator 2 outputs the reaction force reduction torque Td. COPYRIGHT: (C)2006,JPO&NCIPI