| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power steering device capable of surely detecting failure of a solenoid valve by monitoring an operation state of the fail-safe solenoid valve. <P>SOLUTION: This power steering device is provided with an electric motor for normally and reversely rotating a reversible type pump having a pair of outlets for supplying an oil pressure to both of pressure chambers of a hydraulic power cylinder through first and second passages, an electric motor controlling means for outputting a drive signal with respect to the electric motor based on necessary steering assist force in order to make the electric motor generate the required oil pressure, a communication passage for communicating the first and the second passages, the solenoid valve for switching communication and cutting-off of the communication passage, and an electric current detecting means for detecting an electric current between the solenoid valve and the ground on an electric current supply circuit of the solenoid valve. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
