| 摘要 |
PURPOSE: A power steering system of a vehicle is provided to vary steering force according to a speed by changing the steering force based on the transformed amount of a mounting portion in an operating cylinder according to the difference of grounding force between a road surface and a tire. CONSTITUTION: A traffic line(29) to be connected with a pressure chamber is installed in an operating cylinder(17). A movable area of the traffic line is adjusted by a movable valve body(33) to be moved according to the difference of grounding force between a road surface and a tire. Thereby, the steering force is varied according to a speed.
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