Fuel efficient hydraulic power steering

Details Fuel efficient hydraulic power steering Fuel efficient hydraulic power steering

2007-11-30

2010-06-29

Lazo, Thomas E (Department: 3745)

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

C180S421000

Reexamination Certificate

active

07743610

ABSTRACT:
A hydraulic power steering system that maintains proportional pressure control between an input side of a gear and assist pressures internal to the steering gear by relying upon a control valve. A pressure differential is maintained between the input side of a gear and assist pressures internal to the steering gear throughout certain events. Those events include running the pump to fully charge the accumulator, idling the pump after fully charging the accumulator, discharging pressure from the fully charged accumulator at an onset of a steering event having a demand for steering load, recovering the discharged pressure of the accumulator by running the pump after turning on the pump at the onset of the steering event, and opening the relief valve in the valve manifold during the steering event.

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