Patent attributes
A rollover judgment apparatus includes a threshold change functional unit 5 for changing a determination threshold on the basis of a roll angular velocity ω, a tilt angle θv of a vehicle which is acquired by integrating the roll angular velocity ω, a lateral direction acceleration Gy, and a steering wheel angle θs, an ω×θ map judging unit 6 for judging whether or not the vehicle will roll over on the basis of the determination threshold changed by the threshold change functional unit 5, and the tilt angle of the vehicle, a safing functional unit 7 for detecting a tip-up of the vehicle in relation to a motion of the vehicle, and a curtain air bag deploying unit 9 for controlling expansion of a curtain air bag on the basis of an output of the ω×θ map judging unit 6 and an output of the safing functional unit 7.
