Electrically operated power steering apparatus

Details Electrically operated power steering apparatus Electrically operated power steering apparatus

1994-12-20

1995-10-24

Hill, Mitchell J.

Motor vehicles

Compensating devices

318434, 36442405, B62D 504

Patent

active

054602351

ABSTRACT:
An electrically operated power steering apparatus for applying an assistive steering force to a steering system has an electric motor for producing an assistive steering force to be applied to the steering system, a steering torque sensor for producing a steering torque signal indicative of a steering torque of the steering system, and a rotational speed sensor for producing a rotational speed signal indicative of a rotational speed of the electric motor. A controller produces a differential signal of the steering torque signal, calculates a steering rotational speed of the steering system based on the differential signal and the rotational speed signal, and controls the electric motor based on the steering torque signal and the steering rotational speed. The rotational speed signal may be calculated based on a motor current signal indicative of a motor current of the electric motor and a motor voltage signal indicative of a motor voltage of the electric motor.

REFERENCES:
patent: 4730686 (1988-03-01), Shimizu
patent: 5086859 (1992-02-01), Takahashi et al.
patent: 5238079 (1993-08-01), Gorim
patent: 5398953 (1995-03-01), Shimizu

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