Electric power steering apparatus

Details Electric power steering apparatus Electric power steering apparatus

1986-07-02

1988-06-28

Love, John J.

Motor vehicles

Compensating devices

B62D 504

Patent

active

047533099

ABSTRACT:
An electric power assistance steering apparatus provides a differential compensating circuit (54) in which a command current signal is added with a derivative of the command signal to provide a compensated current signal to a control circuit for varying the current to an electric motor (11) arranged to provide power assistance to a steering rack (6). The apparatus preferbly provides signals representative of torque and vehicle speed to a function generator to provide a first command signal which is added with a self-centering command current and the output is provided to give a second command current which is effectively the first command current limited in dependence upon the vehicle speed. The second command current is operated upon by the differential compensating circuit (54) to the compensated current signal.

REFERENCES:
patent: 4653601 (1987-03-01), Nakamura et al.
patent: 4664211 (1987-05-01), Oshita et al.

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