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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 a
frontal airbag 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 a frontal airbag. A side impact airbag
would not help you in many types of collisions,
including many frontal or near frontal collisions, and rear
impacts, primarily because an occupant’s motion is
not toward a side airbag. 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 frontal airbags, and only
in moderate to severe side collisions for side impact
airbags.
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