Method and system for controlling electric power steering

Details Method and system for controlling electric power steering Method and system for controlling electric power steering

1990-07-20

1992-02-11

Hill, Mitchell J.

Motor vehicles

Compensating devices

180142, 318434, B62D 504

Patent

active

050868594

ABSTRACT:
An electric power steering device in which current supplied to an electric motor is controlled in dependence on the torsional torque transmitted through the steering wheel shaft. And power steering is assisted by the rotation of the motor. The method comprises the steps of presetting a steering angle which is in the vicinity of the maximum steering angle and is less by a specific angle than the maximum steering angle; establishing the motor current value determined in dependence on the torsional torque at the time when the actual steering angle reaches the steering angle which is preset as the motor current limiting value at that time; and controlling the power steering device to assist steering by the motor current limiting value even though the torsional torque increases.

REFERENCES:
patent: 4591014 (1986-05-01), Yasuda
patent: 4727950 (1988-03-01), Shimizu et al.
patent: 4756375 (1988-07-01), Ishikura et al.

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