Traction control system responsive to wheel speed fluctuations
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United States of America Patent
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May 25, 1993
Grant Date -
N/A
app pub date -
Dec 19, 1991
filing date -
Dec 19, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A traction control system includes speed sensors (36, 38) associated with a pair of drive wheels (14, 16) for monitoring a vehicle drive train for a pronounced vibration indicative of wheel slip and other speed sensors (40, 42) associated with a pair of non-driving wheels (18, 20) for monitoring vehicle speed. An electronic control unit (52) compares a magnitude of the vibration to a threshold duration that varies with vehicle speed for detecting wheel slip and outputs two command signals for controlling restriction of a differential (24) and a position of engine throttle (32). Differential restriction is increased as a function of a duration of the vibration and decreased as a function of vehicle speed. Engine output power is decreased as a function of a difference between the duration of the vibration and a threshold duration that decreases with increases in vehicle speed.
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