| 摘要 |
PURPOSE: A power steering system of a vehicle is provided to make a drive control a feeling of steering of a power steering system at the driver's choice. CONSTITUTION: A power steering system of a vehicle includes a mode selection key(100) to select the steering mode, a control unit(110), and a pressure control valve. The control unit controls flow rate of hydraulic oil supplied to a power cylinder(80) from a hydraulic pump according to the steering mode by the mode selection key. The pressure control valve installed to the passage between the hydraulic pump and power cylinder varies opening and shutting according to the control signal output from the control unit, and controls the flow rate of the hydraulic oil. At a driver's choice, the control of the feeling of steering is performed by controlling the flow rate of the hydraulic oil and varying the feeling of steering.
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