How Does An Airbag Restrain; What Makes An Airbag Inflate - Cadillac 2005 XLR Owner's Manual

Vehicles with dual stage airbags are also equipped with
seat position sensors which enable the sensing
system to monitor the position of the driver's and
passenger's seats. The seat position sensor provides
information which is used to determine if the airbags
should deploy at a reduced level or at full deployment.
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.
What Makes an Airbag Inflate?
In an impact of sufficient severity, the airbag sensing
system detects that the vehicle is in a crash. For both
frontal and side impact airbags, the sensing system
triggers a release of gas from the inflator, which inflates
the airbag. The inflator, the airbag and related hardware
are all part of the airbag modules inside the steering
wheel, the instrument panel, and the side of the front
seatbacks closest to the door.
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How Does an Airbag Restrain?

In moderate to severe frontal or near frontal collisions,
even belted occupants can contact the steering wheel or
the instrument panel. In moderate to severe side
collisions, even belted occupants can contact the inside
of the vehicle. The airbag supplements the protection
provided by safety belts. Airbags distribute the force of
the impact more evenly over the occupant's upper body,
stopping the occupant more gradually. But the frontal
airbags would not help you in many types of collisions,
including rollovers, rear impacts, and many side impacts,
primarily because an occupant's motion is not toward the
airbag. Side impact airbags would not help you in many
types of collisions, including frontal or near frontal
collisions, rollovers, and rear impacts, primarily because
an occupant's motion is not toward those airbags.
Airbags should never be regarded as anything more than
a supplement to safety belts, and then only in moderate
to severe frontal or near-frontal collisions for the driver's
and passenger's frontal airbags, and only in moderate to
severe side collisions for the driver's and passenger's
side impact airbag.