Power steering system

Details Power steering system Power steering system

B - Operations, Transporting

62

D

180/55

B62D 5/08 (2006.01) B62D 5/06 (2006.01)

Patent

CA 1041438

POWER STEERING SYSTEM Abstract of the Disclosure A vehicle steering system wherein a manual steering gear output controls actuation of a linear hydraulic motor. A control valve, which distributes fluid to and from the boost cylinder, is disposed between the pitman shaft and pitman arm of the manual steering gear. Rotation of the pitman shaft, in response to operator input, causes rotation of the control valve which directs fluid pressure to the hydraulic motor to provide steering assist. The fluid pressure is also directed, through the control valve, to selectively operate on hydraulic reaction members so that a force proportional to steering effort is transmitted back to the operator. A mechanical "overcenter feel" is also provided and has incorporated therewith a mechanical override to provide full manual steering when there is not sufficient fluid pressure to provide hydraulic assist for steering.

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