System for controlling yaw moment based on an estimated coefficient of friction
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United States of America Patent
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-
Jan 20, 1998
Grant Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Nov 25, 1994
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Yaw moment control apparatus is provided for improving the driving behavior of an automotive vehicle tending to oversteering or understeering. The vehicle's velocity, steering angle, measured yaw rate, and lateral acceleration are determined. A yaw controller generates a value representing a desired yaw rate adjustment based on the steering angle, the velocity and the measured yaw rate. An estimated coefficient of friction is calculated based on the vehicle velocity, the lateral acceleration, the measured yaw rate and the steering angle. The estimated coefficent of friction is used by the yaw controller to determined the desired yaw rate adjustment. The mechanism for calculating the estimated coefficient of friction is only enabled while the vehicle is traveling through a curve.
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