Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1987-08-03
1988-08-23
Love, John J.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180133, 180141, 91375A, B62D 508
Patent
active
047654279
ABSTRACT:
An auxiliary pump system for providing detent pressure in a detent-type variable effort power steering system. The auxiliary pump system includes a gerotor-type auxiliary pump mounted on the transmission of the vehicle and driven at a speed proportional to vehicle speed. The primary power steering pump supplies power steering fluid to the power steering gear and all of the power steering fluid exhausting from the steering gear is directed to the intake of the auxiliary pump. The auxiliary pump produces detent pressure when the vehicle is in motion proportional to vehicle speed and the overage of power steering fluid is directed back to the power steering pump reservoir. From a cold start, the power steering fluid consumed by the auxiliary pump heats faster due to passage through the power steering pump than if drawn directly from the reservoir thereby to minimize the duration during which detent pressure is susceptible to viscosity induced pressure instability.
REFERENCES:
patent: 3998131 (1976-12-01), Adams
patent: 4034825 (1977-07-01), Adams
patent: 4434866 (1984-03-01), Duffy
General Motors Corporation
Love John J.
McGiehan Donn
Schwartz Saul
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