Electric power steering system

Details Electric power steering system Electric power steering system

1989-12-08

1990-09-18

Hill, Mitchell J.

Motor vehicles

Compensating devices

180142, 318434, 318448, 318489, 36442405, B62D 504

Patent

active

049571818

ABSTRACT:
A system having a motor operatively connected to a steering system for reducing the steering effort. The system is provided with a torsion torque sensor provided for detecting torsion torque generated in the steering system in a steering operation, and a steering angle sensor provided for detecting steering angle. In response to the output signal of the torsion torque sensor, an assist signal is produced, and in response to the output of the steering angle sensor, a damping signal dependent on the steering speed of a steering wheel is produced. The damping signal is increased with an increase of vehicle speed. A corrected damping signal is added to the assist signal, thereby damping movement of the steering wheel.

REFERENCES:
patent: 4664211 (1987-05-01), Oshita et al.
patent: 4674587 (1987-06-01), Suzuki et al.
patent: 4688655 (1987-08-01), Shimizu
patent: 4735271 (1988-04-01), Shimizu
patent: 4754829 (1988-07-01), Shimizu

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