Electronically controlled power steering system

Details Electronically controlled power steering system Electronically controlled power steering system

1992-04-13

1994-05-03

Hill, Mitchell J.

Motor vehicles

Compensating devices

91375A, 180132, 180141, 180142, 180143, 36442405, B62D 504, B62D 506, B62D 508

Patent

active

053078926

ABSTRACT:
An electronically controlled power steering system for motor vehicles is disclosed for steering dirigible wheels in response to an input torque applied to a steering wheel. The power steering system includes a mechanical steering gear mechanism coupled to the steering wheel for generating a mechanically derived steering force in response to the input torque. A power cylinder is coupled to the mechanical steering gear mechanism for producing a hydraulically derived steering force which augments the mechanically derived steering force. A control valve is provided which is in fluid communication with the power cylinder for generating differential pressure applied to the power cylinder. A first signal is generated which is indicative of the input torque applied to the steering wheel. A signal processing unit generates an output signal in response to the first signal. The signal processing unit is operable to selectively actuate the control valve in response to the output signal for selectively regulating the hydraulically derived steering force generated by the power cylinder.

REFERENCES:
patent: 4875540 (1989-10-01), Oshita et al.

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