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What Makes an Airbag Inflate?
In an impact of sufficient severity, the airbag
sensing system detects that the vehicle is in a
crash. The sensing system triggers a release of
gas from the inflator, which inflates the airbag. The
inflator, airbag and related hardware are all part of
the airbag modules. Frontal airbag modules are
located inside the steering wheel and the
instrument panel. For vehicles with seat-mounted
side impact airbags, there are also airbag modules
in the side of the front seatbacks closest to the
door. For vehicles with roof-mounted side impact
airbags, there are also airbag modules in the ceiling
of the vehicle, near the side window.
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. Airbags
supplement 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
many frontal or near frontal collisions, rollovers, and
rear impacts.
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 right front passenger’s
frontal airbags, and only in moderate to severe side
collisions for vehicles with side impact airbags.
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