Pump for servo steering

Details Pump for servo steering Pump for servo steering

1975-03-26

1976-11-02

Freeh, William L.

Pumps

With condition responsive pumped fluid control

Fluid flow rate responsive

60494, 137117, F04B 4900

Patent

active

039894142

ABSTRACT:
A motor vehicle servo steering system control for flow rate to the hydraulic steering cylinder mechanism utilizes a flow regulating bypass valve between the inlet and outlet of the system pump. A throttle bore device in the pump outlet is adjustable as to bore position to effect a variable operating pressure differential on the flow regulating valve bypass of the pump. The purpose of the arrangement is to effect as constant as possible a rate of flow to the steering servo cylinder mechanism at any given speed but with lowering of rate of flow when pump speed is increasing with engine speed. Accordingly, the invention provides a generally uniformly varying decrease in the amount of steering assist which a vehicle driver receives with increase in vehicle speed so as to convey a safer sense of road reaction at high speeds than would otherwise occur.

REFERENCES:
patent: 3207077 (1965-09-01), Zeigler et al.
patent: 3426785 (1969-02-01), Brady et al.
patent: 3547559 (1970-12-01), Tittmann
patent: 3645647 (1972-02-01), Ciampa et al.

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