Electric power steering apparatus

Details Electric power steering apparatus Electric power steering apparatus

1998-09-15

2000-07-18

Sircus, Brian

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Slipping and/or racing control for electric motors

318587, 318433, 180443, B61C 1508, B62D 504

Patent

active

060912146

ABSTRACT:
An electric power steering apparatus comprises a control unit for drive-controlling a motor to apply an assist torque to a steering system based on signals from various sensors. The control unit comprises a slip angle difference predicting section for predicting a difference between a slip angle of front wheels and a slip angle of rear wheels, and a correcting section for correcting, based on an angle difference signal outputted from the slip angle difference predicting section, a target torque signal supplied to the motor. Behavior of a vehicle is predicted from the angle difference signal and the target torque signal is corrected by a correction amount corresponding to the angle difference signal so that the motor can be drives controlled with the influence of a change in a road surface reaction force taken into consideration.

REFERENCES:
patent: 3687242 (1972-08-01), Green
patent: 3707312 (1972-12-01), Drutchas et al.
patent: 4751978 (1988-06-01), Drutchas et al.
patent: 4830127 (1989-05-01), Ito et al.
patent: 5116254 (1992-05-01), Sano et al.
patent: 5473231 (1995-12-01), McLaughlin et al.
patent: 5475289 (1995-12-01), McLaughlin et al.
patent: 5504403 (1996-04-01), McLaughlin
patent: 5762157 (1998-06-01), Uehara

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