Power steering system

Details Power steering system Power steering system

2007-05-08

2007-05-08

Morris, Lesley D. (Department: 3611)

Motor vehicles

Steering gear

With fluid power assist

C180S421000, C180S422000, C180S405000, C180S403000

Reexamination Certificate

active

11073528

ABSTRACT:
In a power steering system employing a power cylinder for steering assistance, hydraulic pressure is supplied through a pair of fluid lines to respective hydraulic chambers of the power cylinder. Check valves are provided to charge a hydraulic pressure in a communicating circuit intercommunicating the two fluid lines. Also provided is a solenoid-actuated directional control valve for relieving the hydraulic pressure charged in presence of a power steering system failure. An opening of the directional control valve varies depending on a solenoid attracting force and a pressure differential between the hydraulic pressure in the communicating circuit and hydraulic pressure in a reservoir. A relatively low exciting current is applied to the solenoid when the hydraulic pressure charged exceeds a predetermined pressure value. A relatively high exciting current is applied to the solenoid when the hydraulic pressure charged is less than or equal to the predetermined pressure value.

REFERENCES:
patent: 5497692 (1996-03-01), Marcott
patent: 6520520 (2003-02-01), Howard
patent: 6611415 (2003-08-01), Hagidaira et al.
patent: 6981568 (2006-01-01), Kang
patent: 2003/0070863 (2003-04-01), Carlstedt et al.
patent: 2002-145087 (2002-05-01), None
patent: 2002145087 (2002-05-01), None

Affiliated with

Also associated with

Rating

Power steering system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power steering system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power steering system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3775963