Steering angle detecting system for automotive vehicles
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United States of America Patent
Stats
-
Feb 26, 1991
Grant Date -
N/A
app pub date -
Mar 15, 1989
filing date -
Mar 18, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A steering angle detecting system for a vehicle includes a sensor responsive to rotation of a steering wheel for generating angular pulses corresponding in number to the steering angle of the steering wheel. Another sensor generates a reference pulse at a predetermined angle of the steering wheel. The angular pulses are counted by a counter. The steering angle detecting system is determined to be abnormal if the counted value of the counter is not within a predetermined value range when the reference pulse is generated. Further, the rate of change of the counted value by the counter is detected, and the steering angle detecting system is determined to be abnormal if the detected rate of change of the counted value is greater than a predetermined value. Further, the steering angle detecting system is determined to be abnormal if the detected rate of change of the counted value has continued to be smaller than a predetermined value for a predetermined time period or longer.
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Family
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Cited Art Landscape
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