Vehicle rollover detection method
First Claim
1. A method of detecting an impending rollover event of a vehicle, comprising the steps of:
- determining a roll rate and a lateral acceleration of the vehicle;
selecting a first deployment threshold if the roll rate and the lateral acceleration are opposite in polarity, and a second deployment threshold if the roll rate and the lateral acceleration are of like polarity, said first deployment threshold being more sensitive than said second deployment threshold;
determining an operating point of the vehicle; and
detecting an impending rollover event of the vehicle when the determined operating point crosses the selected deployment threshold.
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Accused Products
Abstract
Impending rollover events are detected based on vehicle roll rate, roll angle and lateral acceleration, and an assessment of the relative polarities of vehicle roll rate and lateral acceleration. When the vehicle roll rate and lateral acceleration are opposite in polarity, the roll rate vs. roll angle thresholds used to distinguish between rollover events and non-rollover events are more sensitive than for conditions for which the vehicle roll rate and lateral acceleration are of the same polarity. Additionally, the roll rate vs. roll angle thresholds are adaptively modified based on roll angle and lateral acceleration to provide increased detection sensitivity under conditions that typically precede a rollover event, and reduced detection sensitivity under conditions for which a rollover event is unlikely.
19 Citations
6 Claims
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1. A method of detecting an impending rollover event of a vehicle, comprising the steps of:
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determining a roll rate and a lateral acceleration of the vehicle;
selecting a first deployment threshold if the roll rate and the lateral acceleration are opposite in polarity, and a second deployment threshold if the roll rate and the lateral acceleration are of like polarity, said first deployment threshold being more sensitive than said second deployment threshold;
determining an operating point of the vehicle; and
detecting an impending rollover event of the vehicle when the determined operating point crosses the selected deployment threshold. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification