| 摘要 |
<p>PURPOSE:To make steering sensation ever so better, by controlling a motor current with the value made of multiplying a motor current multiplier, to be reduced by degrees according to a car speed, to the motor current conformed to steering torque, and performing it in a stopped state at the time of assist force cutoff at the specified car speed, in addition. CONSTITUTION:At a running state, usually a motor current IM is determined to the value made up of multiplying the motor current value conformed to steering torque and the motor current multiplier conformed to car speed. And, if the absolute valve of steering torque is within the steering stop judging torque judged by a steering stop judging device 9c unless the car speed is less than V2 (assist cutoff speed), a motor current determining device 9f determines motor current zero. And, current-energization to a DC motor 13 is made into zero by a motor current controlling device 9g, and that, an electromagnetic clutch controlling device 9h cuts off an electromagnetic clutch 16. Accordingly, in a steering state, linkage at the time of transition from car stoppage to running and from running to stoppage becomes smoothed, thus a sense or something incompatibility is in no case entailed there.</p> |
