| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power steering device for front two-axle car, being constituted to enable steering control even when an engine driving type pump and the like stops, simplifying a device structure, making the device compact, and reducing cost. <P>SOLUTION: The power steering device comprises a main pump 10 driven by a vehicle engine, a sub pump 11 driven by a driving means except for the engine, and a control valve 15 switching a flow passage of hydraulic pressure from each pump by the steering operation of a steering handle. The power steering device also comprises a main actuator 50 controlling the rolling of steering wheels 2, 3by the hydraulic pressure switched by the control valve 15, a sub actuator 51 controlling the rolling of the steering wheel 3, and a pump switching means 30 controlling the switching of a state that the hydraulic pressure discharged from both pumps 10, 11 is fed to the control valve 15. An actuator switching means 40 is also provided, which selectively feeding the hydraulic pressure from the control valve 15 by switching the flow passage to both actuators 50, 51. <P>COPYRIGHT: (C)2009,JPO&INPIT |
