Patent ID: 6826468
Filing Date: 2004-11-30
Classification: B60R

Abstract:
A method for detecting a rollover condition of a vehicle having x, y, and z-axes, a laterally oriented reference frame corresponding to the y-axis, and a vertically oriented reference frame corresponding to the z-axis, the method comprising:acquiring first lateral acceleration information representative of an acceleration of the vehicle in the direction of the y-axis; acquiring first vertical acceleration information representative of an acceleration of the vehicle in the direction of the z-axis; acquiring roll angle information based on an angle of the vehicle about the x-axis and relative to the y-axis; processing the roll angle information to provide second lateral acceleration information and second vertical acceleration information; determining compensated lateral acceleration information based on a combination of the first and second lateral acceleration information; determining compensated vertical acceleration information based on a combination of the first and second vertical acceleration information; changing a counter value based on a comparison of compensated acceleration information and a first threshold value; and comparing the counter value with a second threshold value to determine a type of vehicle condition.