Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Patent
1998-07-30
2000-11-28
Cuchlinski, Jr., William A.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
701 46, 180271, 180282, B60R 2200
Patent
active
061546984
ABSTRACT:
An improved deployment method for a vehicular supplemental restraint system, wherein the existence of a rough road condition is indicated if a measure of crash severity obtained from an acceleration sensor exceeds a rough road threshold and the crash event reset criteria are subsequently met with no intervening deployment of the restraint device. The rough road indication is maintained for a timed period, and normal deployment of the restraint device is inhibited during the timed period unless the acceleration signal exceeds a minimum threshold and the measure of crash severity exceeds an additional deployment threshold which is initially higher than the normal deployment threshold. When the rough road condition is detected, a counter is initialized to a predefined value, and then periodically indexed so long as no potential crash event is in progress. If the counter is indexed to another predefined value prior to another rough road detection, the rough road condition is reset. A severe rough road will produce multiple initializations of the counter, resulting in a prolonged rough road indication, whereas a single rough road impact will result in a much shorter rough road indication. Raising the crash severity threshold in the presence of a rough road condition increases immunity to rough road events and allows the use of relatively aggressive reset criteria, while retaining the ability to properly deploy the restraints in a concatenated crash event.
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Bubolz Gretchen Elizabeth
Dalum Joseph Thomas
Patterson Sheri Lynn
Reprogle Kristi Kay
Walden Michael K.
Cuchlinski Jr. William A.
Delco Electronics Corp.
Funke Jimmy L.
Marc-Coleman Marthe
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