Crash pulse energy algorithm for an inflatable restraint system
First Claim
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1. A method of sensitizing an air bag deployment threshold comprising the steps of:
- (1) measuring a first acceleration;
(2) measuring a second acceleration in a direction generally opposite the first acceleration;
(3) measuring a third acceleration;
(4) determining if the first acceleration exceeds a predetermined acceleration;
(5) comparing the third acceleration to a reference value, the reference value having a magnitude origin biased in the direction of, and defined in part as a percentage of the second acceleration; and
(6) increasing a crash-pulse energy term in response to the third acceleration increasing above the predetermined acceleration relative to the magnitude origin of said step (5).
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Abstract
An air bag system (12) includes a controller (14), a remote satellite sensor (16), and a deployable air bag (18). Controller logic for deployment discrimination of an impact event sensitizes an airbag deployment command in response to signals from the satellite sensor. The logic determines a crash-pulse energy term (CPE) which discriminates impact signals which are particularly useful for identifying side impact events.
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Citations
17 Claims
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1. A method of sensitizing an air bag deployment threshold comprising the steps of:
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(1) measuring a first acceleration; (2) measuring a second acceleration in a direction generally opposite the first acceleration; (3) measuring a third acceleration; (4) determining if the first acceleration exceeds a predetermined acceleration; (5) comparing the third acceleration to a reference value, the reference value having a magnitude origin biased in the direction of, and defined in part as a percentage of the second acceleration; and (6) increasing a crash-pulse energy term in response to the third acceleration increasing above the predetermined acceleration relative to the magnitude origin of said step (5). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of sensitizing an air bag deployment threshold comprising the steps of:
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(1) measuring a first acceleration; (2) determining whether the first acceleration exceeds a predetermined acceleration; (3) measuring a second acceleration, the second acceleration in a direction generally opposite the first acceleration; (4) measuring a third acceleration, the third acceleration in a direction generally the same as the first acceleration; (5) comparing the third acceleration to a reference value, the reference value having a magnitude origin biased in the direction of, and defined in part as a percentage of the second acceleration; and (6) increasing a crash-pulse energy term in response to the third acceleration increasing above the predetermined acceleration relative to the magnitude origin of said step (5). - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification