Method for controlling actuation of a vehicle safety device usin

Details Method for controlling actuation of a vehicle safety device usin Method for controlling actuation of a vehicle safety device usin

1994-12-08

1996-05-28

Teska, Kevin J.

Boots, shoes, and leggings

340669, 307 101, 280735, 180282, B60R 2132

Patent

active

055218229

ABSTRACT:
The present invention is directed to a filtering technique for improving the capability of crash sensing systems in distinguishing between severe and minor crash events. The onset of a crash event is detected when a sensed vehicle deceleration exceeds a deceleration threshold value. Following the onset of the crash event, a crash severity parameter is calculated at predetermined intervals as a function of vehicle deceleration. At the conclusion of a predetermined time period, a value of the crash severity parameter less than or equal to a parameter threshold value corresponds to a minor crash incident. A value greater than the parameter threshold value corresponds to a potential severe crash event requiring airbag deployment, thereby necessitating further crash severity discrimination. Before continuing, crash severity parameters having specific signal trace characteristics discard deceleration data generated during the initial stages of the crash event, preventing potentially misleading deceleration data from influencing airbag deployment. A severe crash event is characterized by the values of multiple crash severity parameters simultaneously exceeding their respective deployment threshold levels. A value of at least one of the crash severity parameters less than a predetermined reset threshold value corresponds to a minor crash incident.

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