Supplemental inflatable restraint system having a rear impact al

Details Supplemental inflatable restraint system having a rear impact al Supplemental inflatable restraint system having a rear impact al

1994-03-04

1995-10-24

Teska, Kevin J.

Boots, shoes, and leggings

307 101, 340669, 280735, 180282, B60R 2116, B60R 2118, B60R 22343

Patent

active

054615674

ABSTRACT:
A system having an accelerometer and a micro-controller responsive to acceleration signals for deploying an air bag as well as activating a pretensioner upon frontal impact includes an algorithm for activating the pretensioner upon rear impact. A frontal crash algorithm is executed when the acceleration exceeds a negative threshold and a rear impact algorithm is enabled when the acceleration exceeds a positive threshold. Rear impact severity is tested by integrating positive acceleration samples and issuing an activation command when the integrated value attains a severity threshold value. Noise immunity results from the positive threshold and from resetting the integrated value to zero whenever a negative acceleration sample intervenes in the severity test.

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