Chevrolet 2007 IMPALA Automobile User Manual


 
When Should an Airbag Inflate?
The driver’s and right front passenger’s frontal
airbags are designed to inflate in moderate
to severe frontal or near-frontal crashes. But
they are designed to inflate only if the impact
exceeds a predetermined deployment threshold.
Deployment thresholds take into account a variety
of desired deployment and non-deployment
events and are used to predict how severe a crash
is likely to be in time for the airbags to inflate
and help restrain the occupants. Whether
your frontal airbags will or should deploy is not
based on how fast your vehicle is traveling.
It depends largely on what you hit, the direction
of the impact, and how quickly your vehicle
slows down.
In addition, your vehicle has “dual-stage” frontal
airbags, which adjust the restraint according
to crash severity. Your vehicle has electronic
frontal sensors which help the sensing system
distinguish between a moderate frontal impact
and a more severe frontal impact. For moderate
frontal impacts, these airbags inflate at a level
less than full deployment. For more severe frontal
impacts, full deployment occurs. If the front of
your vehicle goes straight into a wall that does
not move or deform, the threshold level for
the reduced deployment is about 12 to 16 mph
(19 to 26 km/h), and the threshold level for
a full deployment is about 18 to 22 mph
(29 to 35.4 km/h). The threshold level can vary,
however, with specific vehicle design, so that it
can be somewhat above or below this range.
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