| 摘要 |
A power-steering system for a vehicle includes a steering wheel which turns the front wheels, a power cylinder device which assists the steering wheel in turning the front wheels, a vehicle speed sensor which detects the vehicle speed, and a control unit which controls the power cylinder device so that the assisting force with which the power cylinder device assists the steering wheel is reduced with increase in the vehicle speed. The control unit has a reverse gear sensor which detects when the transmission of the vehicle is in reverse, and reduces the assisting force with increase in the vehicle speed at a higher rate when the vehicle runs rearward than when the vehicle runs forward.
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