Power steering system

Details Power steering system Power steering system

1988-04-29

1989-08-29

Hill, Mitchell J.

Motor vehicles

Compensating devices

B62D 504

Patent

active

048608440

ABSTRACT:
A power steering system suitable for large off-highway and other vehicles has no mechanical linkages or hydraulic connections entering into the driver's cab. Torque demand signals are produced in an electromechanical torque sensor that measures the deflections of a torsional spring. The system provides synchronization between steering and steered wheels upon starting, without initial corrective motion of either member. During operation, the direction of the steered wheels does not drift with respect to the position of the steering wheel. In the event of certain types of failures of its primary steering system the apparatus automatically changes over to an open-loop secondary steering system that is controllable by the same steering wheel, and that has components in common with the closed-loop primary system.

REFERENCES:
patent: 3011579 (1961-12-01), Milliken
patent: 3247431 (1966-04-01), Kase
patent: 4653601 (1987-03-01), Nakamura

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