Supplemental restraint deployment method using dynamic crash classification
First Claim
1. A method of deploying a supplemental restraint based on multiple distributed measures of vehicle acceleration, the method comprising the steps of:
- defining a plurality of crash types characterized by different relationships among the distributed measures of vehicle acceleration;
establishing calibrated severity thresholds for each of said crash types;
developing a measure of crash severity from the measures of vehicle acceleration; and
enabling deployment of said restraint when the measure of crash severity exceeds the selected severity threshold;
said method further comprising, for a crash event;
determining a first crash type based upon the distributed measures of vehicle acceleration and the definitions of crash type,setting a first severity threshold based upon the first crash type;
continuously monitoring said measures of acceleration during the course of the crash event, anddynamically reclassifying the crash event to a second crash type based upon changes in the distributed measures; and
setting a second severity threshold based upon the second crash type.
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Accused Products
Abstract
A deployment method for a supplemental restraint system having multiple distributed acceleration sensors dynamically classifies each crash event based on relationships among the acceleration signals. A severity threshold is selected based on the instant crash classification, and a measure of crash severity is compared to the selected severity threshold to determine if the restraints should be deployed. The measure of crash severity is determined by computing individual measures of crash severity for the various frontal acceleration sensors and selecting the highest of the individual measures.
12 Citations
7 Claims
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1. A method of deploying a supplemental restraint based on multiple distributed measures of vehicle acceleration, the method comprising the steps of:
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defining a plurality of crash types characterized by different relationships among the distributed measures of vehicle acceleration; establishing calibrated severity thresholds for each of said crash types; developing a measure of crash severity from the measures of vehicle acceleration; and enabling deployment of said restraint when the measure of crash severity exceeds the selected severity threshold; said method further comprising, for a crash event; determining a first crash type based upon the distributed measures of vehicle acceleration and the definitions of crash type, setting a first severity threshold based upon the first crash type; continuously monitoring said measures of acceleration during the course of the crash event, and dynamically reclassifying the crash event to a second crash type based upon changes in the distributed measures; and setting a second severity threshold based upon the second crash type. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification