Patent ID: 7222010

Claim:
A rollover determination apparatus for vehicles comprising: a roll angular velocity detecting means for detecting, as a roll angular velocity, a rotational angular velocity of a vehicle about a longitudinal axis extending lengthwise through the vehicle; an upward-or-downward-acceleration detecting means for detecting, as an upward or downward acceleration, an acceleration in an upward or downward direction of the vehicle; an arithmetic processing means for carrying out arithmetic processing on both the roll angular velocity detected by said roll angular velocity detecting means and the upward or downward acceleration detected by said upward-or-downward-acceleration detecting means; and a rollover occurrence determining means for determining whether the vehicle will roll over based on a processing result of said arithmetic processing means, wherein when a product of the roll angular velocity and the upward or downward acceleration, which is the processing result of said arithmetic processing means, exceeds a predetermined threshold, said rollover occurrence determining means determines that said vehicle will roll over.