Method and apparatus for predicting vehicle rollover during a trip-over event
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United States of America Patent
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-
Dec 6, 2011
Grant Date -
Oct 28, 2010
app pub date -
Apr 24, 2009
filing date -
Apr 24, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A vehicle includes wheels, force sensors adapted for a vertical force and lateral force of each wheel, an onboard device, and a controller. The controller calculates vehicle values using the vertical force and lateral force, compares the values to a corresponding threshold, and automatically deploys the device when each element value does not exceed a corresponding threshold. A method for determining when to deploy an airbag includes measuring a vertical and lateral force at each wheel, and measuring a yaw rate and roll angle. A lateral velocity is calculated using the lateral force, and a lift of each wheel is calculated using the vertical force. The roll angle, roll rate, and stopping time are processed to generate a point on a 3D rollover plane. A rollover energy rate is calculated, and the airbag deploys when the point, rollover energy rate, and lift do not exceed a threshold.
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