| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic power steering device which can remove an air surely when an oil is filled up at the state mounted on a vehicle and in which the delay of the response caused by a residual air is not generated. SOLUTION: The air staying in a second oil chamber 14 positioned on the opposite side of a control valve while holding a piston formed on a ball nut is escaped from a second port opened on the most upper part of the second oil chamber to the control valve side through a first port staying on the more upper part than this. When the device is driven, the air in the control valve is escaped to the air sump of the upper part in an oil tank in response to the circulation of the oil in the device. |
