| 摘要 |
PURPOSE:To provide a power steering system controller which is simple in structure and inexpensive. CONSTITUTION:A detected value of a steering angular velocity sensor 3 is put into a CPU 6c through a steering angular velocity input circuit 6b. A current detecting circuit 6f detects a current supplied from a motor driving circuit 6d to a motor 7, and the detected value is supplied to the CPU 6c. As this current detected value is in proportion to steering input torque, the size of the steering input torque can be known from this current detected value. The CPU 6c executes unloader control when the current detected value becomes more than a predetermined current value and the steering angular velocity is less than a predetermined value. By this, a torque sensor provided at a conventional device is made unnecessary. |
