STEERING FORCE CONTROL DEVICE FOR POWER STEERING DEVICE

PURPOSE:To weaken a assist-force to enhance handle-returnability and perform handle operations by the assist-force to improve handle operability by forming a steering force control device so that it performs return control aggressively during acceleration and it does not perform the return control during deceleration. CONSTITUTION:A first calculation means 7 inputting signals from car speed- and steering angle sensors 40, 45 calculates a basic control current from a first storage means 3, and second and third calculation means 9, 10 calculate return factors for return control currents respectively corresponding to steering angle and steering angular speed from second and third storage means 5, 6. At this time, when detection signals of a handle-returned state detecting means 1 and an acceleration detecting means 2 are inputted to a fourth calculation means 11, the fourth calculation means calculates the control currents based on the basic control current and respective return factors calculated by the second and third calculation means 9, 10. An output means 12 then applies the control currents equivalent to the values calculated by the fourth calculation means 11 to an electromagnetic control valve 30 to open the valve up to a specified opening. Handle-returnability during acceleration in handle-returned state can thus be suitably controlled.