System and method for sensing soil-and curb-tripped rollover events
First Claim
Patent Images
1. A method of controlling a restraint device in a vehicle during a crash, the method comprising:
- sensing a lateral condition;
classifying the crash based on the lateral condition;
sensing a roll value;
comparing the roll value with a plausibility region; and
activating the restraint device based on the classified crash and when the roll value falls within the plausibility region,wherein classifying the crash based on the lateral condition comprisesdetermining a processed lateral condition from the lateral condition, wherein the processed condition comprises at least one of a derivative of the lateral condition, a slope of the lateral condition, and a rate of change of the lateral condition,comparing the lateral condition and the processed lateral condition to a soil-trip threshold,comparing the lateral condition and the processed lateral condition to a curb-trip threshold,activating the restraining device based on a soil-trip rollover crash when the lateral condition and the processed lateral condition cross the soil-trip threshold, and a curb-trip rollover crash when the lateral condition and the processed lateral condition cross the curb-trip threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and a system of controlling a restraint device in a vehicle during a crash. The method includes sensing a lateral condition, classifying the crash, sensing a roll value, comparing the roll value with a plausibility region, and activating the restraint device based on the classified crash and when the roll value falls within the plausibility region.
34 Citations
22 Claims
-
1. A method of controlling a restraint device in a vehicle during a crash, the method comprising:
-
sensing a lateral condition; classifying the crash based on the lateral condition; sensing a roll value; comparing the roll value with a plausibility region; and activating the restraint device based on the classified crash and when the roll value falls within the plausibility region, wherein classifying the crash based on the lateral condition comprises determining a processed lateral condition from the lateral condition, wherein the processed condition comprises at least one of a derivative of the lateral condition, a slope of the lateral condition, and a rate of change of the lateral condition, comparing the lateral condition and the processed lateral condition to a soil-trip threshold, comparing the lateral condition and the processed lateral condition to a curb-trip threshold, activating the restraining device based on a soil-trip rollover crash when the lateral condition and the processed lateral condition cross the soil-trip threshold, and a curb-trip rollover crash when the lateral condition and the processed lateral condition cross the curb-trip threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of controlling a restraint device in a vehicle during a crash, the method comprising:
-
generating a first signal indicative of a lateral acceleration of the vehicle; determining a second signal from the first signal; retrieving a trip-rollover region representing lateral accelerations and changes in lateral accelerations based on the first and second signals; generating a third signal indicative of a roll rate of the vehicle; determining a fourth signal from the third signal; retrieving a plausibility region representing roll rates and changes in roll rates based on the third and fourth signals; comparing the first and second signals to a soil-trip threshold; comparing the first and second signals to a curb-trip threshold; activating the restraint device when the first and second signals are in the trip-rollover region, and when the third and fourth signals are in the plausibility region, wherein the restraining device is activated based on a soil-trip rollover crash when the first and second signals cross the soil-trip threshold, and is activated based on a curb-trip rollover crash when the first and second signals cross the curb-trip threshold. - View Dependent Claims (9, 10, 11)
-
-
12. A system for controlling a restraint device in a vehicle during a crash, the system comprising:
-
a lateral condition sensor configured to sense a lateral condition experienced by the vehicle; a classifier configured to classify the crash based on the lateral condition; a roll sensor configured to sense a roll condition experienced by the vehicle; a comparator configured to compare the sensed roll value with a plausibility region; a signal generator configured to activate the restraint device based on the classified crash and when the roll value falls within the plausibility region; a processor configured to determine a processed lateral condition from the lateral condition, wherein the processed condition comprises at least one of a derivative of the lateral condition, a slope of the lateral condition, and a rate of change of the lateral condition; and a memory operable to store a plurality of lateral condition regions derived from calibrating a set of lateral conditions and a set of processed lateral condition, wherein the comparator is further configured to compare the sensed lateral condition and the processed lateral condition with the lateral condition regions, and wherein the processor is further configured to indicate a trip-rollover type if the sensed lateral condition and the processed lateral condition fall in one of the lateral condition regions, wherein the trip-rollover type comprises a soil-trip rollover and a curb-trip rollover. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
-
19. A method of controlling a restraint device in a vehicle during a crash, the method comprising:
-
sensing a lateral condition; determining a processed lateral condition based on the lateral condition, the processed lateral condition including at least one of a derivative of the lateral condition, a slope of the lateral condition, and a rate of change of the lateral condition; classifying the type of crash based on the lateral condition and the processed lateral condition; comparing the lateral condition and the processed lateral condition to a soil-trip threshold; comparing the lateral condition and the processed lateral condition to a curb-trip threshold; activating a restraint device based on a soil-trip rollover crash when the lateral condition and the processed lateral condition cross the soil-trip threshold and based on a curb-trip rollover crash when the lateral condition and the processed lateral condition cross the curb-trip threshold. - View Dependent Claims (20)
-
-
21. A method of classifying a type of vehicle crash, the method comprising:
-
sensing a set of lateral conditions; determining a set of processed lateral conditions based on the set of lateral conditions, each processed later condition including at least one of a derivative of the lateral condition, a slope of the lateral condition, and a rate of change of the lateral condition; defining a plurality of lateral condition regions based on the set of lateral conditions and the set of processed lateral conditions; comparing each sensed lateral condition and each processed lateral condition with the lateral condition regions; and classifying the crash as a trip-rollover type crash if a sensed lateral condition and a processed lateral condition fall in one of the lateral condition regions, wherein the trip-rollover type crash includes a soil-trip rollover and a curb-trip rollover. - View Dependent Claims (22)
-
Specification