Power steering system

Details Power steering system Power steering system

2005-12-27

2005-12-27

Hurley, Kevin (Department: 3611)

Motor vehicles

Steering gear

With alternate emergency power means

C180S421000

Reexamination Certificate

active

06978859

ABSTRACT:
A power steering system includes a reversible pump for supplying hydraulic fluid to pressure chambers of a power cylinder through first and second passages, an assisting-force detector for detecting a steering assisting force to be provided to a steering wheel, a motor control circuit outputting a drive signal to an electric motor in accordance with the detected steering assisting force so as to obtain a desired hydraulic pressure, a communication passage for providing fluid communication between the first and second passages, a solenoid valve for switching between communication and interruption of the communication passage, and a current detector for detecting a current passing through an energization circuit of the solenoid valve and between the solenoid valve and a ground.

REFERENCES:
patent: 4771749 (1988-09-01), Kiuchi et al.
patent: 4787469 (1988-11-01), Yoshida et al.
patent: 2004/0238261 (2004-12-01), Kodama et al.
patent: 2002-145087 (2002-05-01), None

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