Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1987-07-06
1988-09-06
Love, John J.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
74388PS, 9175A, 91426, 91437, 13762524, 180148, 251297, B62D 508
Patent
active
047686049
ABSTRACT:
A variable effort power steering system for an automobile includes a rotary valve power steering gear, a detent type variable effort detent system whereby a fluid detent pressure proportional to vehicle speed operates on a detent between an input member of the steering gear and an output member of the steering gear to prevent relative angular displacement therebetween until steering handwheel effort exceeds a threshold magnitude increasing with increasing detent pressure, and a shunt system between the two working chambers of the steering assist fluid motor. The shunt system includes a shunt valve in a shunt passage between the working chambers which is closed at zero or low vehicle speed and is progressively opened by detent pressure as vehicle speed increases whereby progressively more fluid is shunted from the active working chamber to the reservoir at higher vehicle speeds. By shunting fluid to the reservoir, the increase in steering assist boost pressure is rendered more linear relative to handwheel effort.
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patent: 4601358 (1986-07-01), Kozuka et al.
patent: 4621704 (1986-11-01), Kozuka
General Motors Corporation
Hill Mitchell J.
Love John J.
Schwartz Saul
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