Vehicle roll sensing using load shift estimation
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United States of America Patent
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Jan 16, 2007
Grant Date -
Mar 3, 2005
app pub date -
Jul 21, 2004
filing date -
Jul 22, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In vehicle roll sensing of the present invention, a self-aligning torque (SAT) estimator estimates a composite value of SATs generated on tire contact patch of right and left wheels. A slip angle computer detects a vehicle speed and a steering angle and computes a slip angle of the wheel from the measured vehicle speed and steering angle. An SAT model value computer estimates an SAT model value as a composite value of SATs of the right and left wheels when no load shifts between the right and left wheels on the basis of the slip angle. A load shift ratio estimator estimates a load shift state of the right and left wheels on the basis of the composite value of the SATs of the wheels and the SAT model value. A vehicle rollover estimator estimates a rollover of the vehicle on the basis of the estimated load-shift state.
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