Power steering apparatus

Details Power steering apparatus Power steering apparatus

1995-05-30

1997-07-29

Johnson, Brian L.

Motor vehicles

Steering gear

No mechanical connection between steering shaft and steering...

180442, B62D 5087

Patent

active

056514239

ABSTRACT:
A hydraulic power steering apparatus includes a motor-driven pump which discharges pressurized working fluid at a flow rate proportional to the rotational speed. A load-pressure responsive valve is connected to a discharge passage to which the pressurized fluid is discharged from the pump. The load-pressure responsive valve bypasses the pressurized fluid to a reservoir when the control valve is in a neutral state, thereby reducing the amount of the pressurized fluid supplied to the control valve, and increases the amount of the pressurized fluid supplied to the control valve when the load pressure of the pump increases upon operation of the control valve. With this control, the energy consumed by the pump can be reduced.

REFERENCES:
patent: 4434866 (1984-03-01), Duffy
patent: 4601358 (1986-07-01), Kozuka et al.
patent: 5135068 (1992-08-01), Emori et al.
patent: 5439070 (1995-08-01), Haga et al.
patent: 5471838 (1995-12-01), Suzuki et al.

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