Method and apparatus for learning neutral position of vehicle st

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180 79, 180 791, B62B 600, B62B 1500

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052531724

ABSTRACT:
A method and apparatus for learning the neutral position of vehicle steering angle, in which first neutral position decision means decides that the steering shaft is at a neutral position when a running speed detector detects that the vehicle speed is not less than a predetermined threshold level, that the difference in peripheral speed between the right and left drive wheels is smaller than a predetermined first straight-running threshold value and also when a steering shaft reference position sensor continues to detect a reference position of the steering shaft for at least a first count time. The vehicle steering angle is computed on the basis of the angular displacement from the neutral position thus learned.

REFERENCES:
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patent: 4640557 (1987-02-01), Panizza et al.
patent: 4685528 (1987-08-01), Suzuki et al.
patent: 4719981 (1988-01-01), Miyoshi
patent: 4779202 (1988-10-01), Leiber
patent: 4914366 (1990-04-01), Yuasa et al.
Patent Abstracts of Japan, unexamined application, M Field, vol. 7, No. 141, Jun. 21, 1983, pp. 130 M 223, Kokai No. 58-54 270.

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