Electric power steering system

Details Electric power steering system Electric power steering system

1988-06-29

1989-05-30

Pekar, John A.

Motor vehicles

Compensating devices

36442401, B62D 504

Patent

active

048342033

ABSTRACT:
An electric power steering system has a torsion torque sensor provided for detecting torsion torque generating in a steering system of a motor vehicle, for providing an assist signal for driving a motor to turn a steering wheel. A steering angle sensor is provided for detecting steering angle of the steering wheel and for producing a steering angle signal. In response to the steering angle signal, a return torque signal is produced for steering wheel. A vehicle speed sensor is provided for producing a vehicle speed signal dependent on speed of the vehicle, and a calculator is provided calculating lateral acceleration impared to the vehicle and for producing a lateral-acceleration-dependent-return torque signal. In accordance with the vehicle speed signal, the lateral-acceleration-dependent-return torque signal is corrected to produce return torque correcting signal, the absolute value of which reduces with increase of vehicle speed. The return torque correcting signal is added to the return torque signal for correcting the latter signal.

REFERENCES:
patent: 4664211 (1987-05-01), Oshita et al.
patent: 4735271 (1988-04-01), Shimizu

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