Fail-safe system for vehicular driving characteristics control s

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Details

180141, 180142, B62D 500

Patent

active

049396544

ABSTRACT:
A steering behavior dependent control system for controlling vehicular driving characteristics performs one or more control operations, such as anti-rolling suspension control, power assist control in a power steering system, rear wheel steering angle control in a four wheel steering system and so forth. The control system includes a steering angle sensor for monitoring steering angular displacement and produces a steering angle indicative signal. The control system is also provided a steering neutral position detector which detects steering at approximately a neutral position to produce an assumed steering neutral position indicative signal. A center value of a steering neutral range is projected on the basis of the steering angle indicative signal and the assumed steering neutral position indicative signal. Steering angle dependent control is thus performed by comparing the steering angle indicative signal value with the aforementioned center value to derive a magnitude of steering angular displacement. The control system further monitors an operating condition of the steering neutral position detector to detect a faulty condition thereof. When failure of the steering neutral position detector is detected, predetermined fail-safe operation takes place. In the fail-safe operation, the assumed center value of the steering neutral range is derived without utilizing the assumed steering neutral position indicative signal.

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