CHEVROLET CORVETTE 2005 - Manual (Page 51)

When Should an Airbag Inflate?
The driver’s and 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.
If your vehicle goes straight into a wall that does not
move or deform, the threshold level is about 9 to 15 mph
(14 to 24 km/h). (The threshold level can vary,
however, with specific vehicle design, so that it can be
somewhat above or below this range.)
Airbags may inflate at different crash speeds.
For example:
• If the vehicle hits a stationary object, the airbag
could inflate at a different crash speed than if
the object were moving.
• If the object deforms, the airbag could inflate
at a different crash speed than if the object does
not deform.
• If the vehicle hits a narrow object (like a pole) the
airbag could inflate at a different crash speed
than if the vehicle hits a wide object (like a wall).
• If the vehicle goes into an object at an angle the
airbag could inflate at a different crash speed
than if the vehicle goes straight into the object.
The frontal airbags (driver and passenger) are not
intended to inflate during vehicle rollovers, rear impacts,
or in many side impacts because inflation would not
likely help the occupants.
Side impact airbags are designed to inflate in moderate
to severe side crashes. A side impact airbag will
inflate if the crash severity is above the system’s
designed “threshold level.” The threshold level can vary
with specific vehicle design. Side impact airbags are
not designed to inflate in frontal or near-frontal impacts,
rollovers or rear impacts, because inflation would not
likely help the occupant. A side impact airbag will
only deploy on the side of the vehicle that is struck.
In any particular crash, no one can say whether
an airbag should have inflated simply because of the
damage to a vehicle or because of what the repair costs
were. For frontal airbags, inflation is determined by
the angle of the impact and how quickly the vehicle
slows down in frontal and near-frontal impacts. For side
impact airbags, inflation is determined by the location
and severity of the impact.
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