| 摘要 |
PURPOSE:To improve the steering feeling in the steering at a low steering speed by setting the speed width in each steering speed region on the low steering speed side to a relatively small value, in each steering speed region in which a control map which prescribes the relation between the car speed and the electric power supplied into an electric motor is set. CONSTITUTION:The discharged oil of a hydraulic pump 9 driven by an electric motor 11 is supplied into a power cylinder 4 through a selector valve 13 which is selected in interlocking with the operation of a steering wheel 2, and a steered wheel 7 is steered by the power, and the electric motor 11 is controlled by a control means 16 on the basis of the output signals of a steering speed sensor 17 and a car speed sensor 16. In the control means 16, the steering speed region is divided into four high and low stages, and a memory means which memorizes a steering speed division map in which the speed width of each steering speed region on the low steering speed side is set smaller in comparison with the speed width of the steering region on the high steering speed side is memorized is provided, and the electric power supplied to the electric motor 11 is controlled according to the car speed in conformity with the map. |
