Apparatus and method for detecting vehicle rollover having roll-rate switched threshold
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United States of America Patent
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Aug 13, 2002
Grant Date -
Jun 20, 2002
app pub date -
Jan 24, 2001
filing date -
Dec 20, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A vehicle rollover event detector (10) includes an accelerometer (80) that senses vehicle acceleration in a direction offset from a front-to-rear axis of the vehicle (12) and provides an acceleration signal (101) indicative thereof. A rollover sensor (14) senses vehicle roll and provides a roll signal (32) indicative of vehicle roll about the front-to-rear axis of the vehicle. A controller (26) compares the roll signal (32) against a first rollover threshold (42) when the acceleration signal (101) is less than an acceleration threshold (113) and compares the roll signal (32) against a second rollover threshold (116) when the acceleration signal (101) is equal to or greater than the acceleration threshold (113) and for indicating a vehicle rollover condition when the roll signal is greater than the threshold (42, 116) it is compared against.
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