| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electric power steering device capable of surely easing impact at end-abutting while restraining deterioration of steering feeling at a position near a maximum steering angle. <P>SOLUTION: A target electric current setting part 12 for setting a target value of the electric current to be supplied to a motor determines a basic assist electric current value Ia based on a steering torque detection value T and a vehicle speed detection value V, and multiplies the basic assist electric current value Ia by an assist gain Ga so as to calculate an electric current target value It. The assist grain Ga is calculated by Ga=1-GRv×GRi based on an electric current reduction gain GRi and a vehicle speed gain GRv, and the electric current reduction gain GRi is set as follows by an electric current reduction gain calculating part 127. That is, when a steering angle ¾θ¾ exceeds a reduction start steering angle set near the maximum steering angle, the steering torque detection value T to the direction approaching the maximum steering angle and a steering angle speedωare multiplied, and the electric current reduction gain GRi is set to be larger as the multiplied value SUM gets larger. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
