Rollover judgment apparatus
First Claim
1. A rollover judgment apparatus for judging whether or not a vehicle will roll over by comparing an output of a roll angular velocity sensor with a threshold, said device comprising:
- a threshold change functional unit forjudging whether or not to change the determination threshold on a basis of a roll angular velocity, a tilt angle of the vehicle which is acquired by integrating the roll angular velocity, and at least one of;
a lateral direction acceleration obtained from a lateral direction acceleration sensor, and a steering wheel angle obtained from a steering wheel angle sensor, andchanging the determination threshold in response to the judgment being made by the threshold change functional unit to change the determination threshold;
a rollover judging unit for judging whether or not the vehicle will roll over on a basis of the determination threshold, and said tilt angle of the vehicle;
a safing functional unit for detecting a tip-up of the vehicle in relation to a motion of the vehicle; and
a curtain air bag deploying unit for controlling expansion of a curtain air bag on a basis of an output of said rollover judging unit and an output of said safing functional unit,wherein the rollover judging unit judges whether or not the vehicle will rollover by comparing the tilt angle to the unchanged determination threshold when the judgment is made by the threshold change functional unit not to change the determination threshold, and by comparing the tilt angle to the changed determination threshold when the judgment is made by the threshold change functional unit to change the determination threshold.
2 Assignments
0 Petitions
Accused Products
Abstract
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.
-
Citations
11 Claims
-
1. A rollover judgment apparatus for judging whether or not a vehicle will roll over by comparing an output of a roll angular velocity sensor with a threshold, said device comprising:
-
a threshold change functional unit for judging whether or not to change the determination threshold on a basis of a roll angular velocity, a tilt angle of the vehicle which is acquired by integrating the roll angular velocity, and at least one of;
a lateral direction acceleration obtained from a lateral direction acceleration sensor, and a steering wheel angle obtained from a steering wheel angle sensor, andchanging the determination threshold in response to the judgment being made by the threshold change functional unit to change the determination threshold; a rollover judging unit for judging whether or not the vehicle will roll over on a basis of the determination threshold, and said tilt angle of the vehicle; a safing functional unit for detecting a tip-up of the vehicle in relation to a motion of the vehicle; and a curtain air bag deploying unit for controlling expansion of a curtain air bag on a basis of an output of said rollover judging unit and an output of said safing functional unit, wherein the rollover judging unit judges whether or not the vehicle will rollover by comparing the tilt angle to the unchanged determination threshold when the judgment is made by the threshold change functional unit not to change the determination threshold, and by comparing the tilt angle to the changed determination threshold when the judgment is made by the threshold change functional unit to change the determination threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A rollover judgment apparatus for judging whether or not a vehicle will roll over by comparing an output of a roll angular velocity sensor with a threshold, said device comprising:
-
a threshold change functional unit for judging whether or not to change the determination threshold on a basis of a roll angular velocity, a tilt angle of the vehicle which is acquired by integrating the roll angular velocity, and at least one of;
a lateral direction acceleration obtained from a lateral direction acceleration sensor, and a steering acceleration which is acquired from a steering wheel angle sensed by a steering wheel angle sensor, andchanging the determination threshold in response to a judgment being made by the threshold change functional unit to change the determination threshold; a rollover judging unit for judging whether or not the vehicle will roll over on a basis of the determination threshold changed by said threshold change functional unit, and said tilt angle of the vehicle; a safing functional unit for detecting a tip-up of the vehicle in relation to a motion of the vehicle; and a curtain air bag deploying unit for controlling expansion of a curtain air bag on a basis of an output of said rollover judging unit and an output of said safing functional unit, wherein the rollover judging unit judges whether or not the vehicle will rollover by comparing the tilt angle to the unchanged determination threshold when the judgment is made by the threshold change functional unit to change the determination threshold, and by comparing the tilt angle to the changed determination threshold when the judgment is made by the threshold change functional unit to change the determination threshold.
-
-
11. A rollover judgment method for judging whether or not a vehicle will roll over, comprising:
-
utilizing a roll angular velocity sensor to obtain a roll angular velocity, utilizing at least one of a lateral direction acceleration sensor and a steering wheel angle sensor to obtain at least one of a lateral direction acceleration and a steering wheel angle; judging whether or not to change a determination threshold on the basis of the roll angular velocity, a tilt angle of the vehicle which is acquired by integrating the roll angular velocity, and at least one of;
the lateral direction acceleration sensed by the lateral direction acceleration sensor, the steering wheel angle sensed by the steering wheel angle sensor, and a steering wheel acceleration which is acquired from the steering wheel angle;changing the determination threshold in response to the judgment being made to change the determination threshold; judging whether or not the vehicle will roll over on a basis of the determination threshold, and said tilt angle of the vehicle; detecting a tip-up of the vehicle in relation to a motion of the vehicle; and controlling expansion of a curtain air bag on a basis of the judgment of whether or not the vehicle will rollover and the detection of the tip-up of the vehicle, wherein the judgment of whether or not the vehicle will rollover is made by comparing the tilt angle to the unchanged determination threshold when the judgment is made by the threshold change functional unit not to change the determination threshold, and by comparing the tilt angle to the changed determination threshold when the judgment is made by the threshold change functional unit to change the determination threshold.
-
Specification