Belt Tensioners And Belt Force Limiters - SMART forfour Operating Instructions Manual

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Belt tensioners and belt force limiters

Belt tensioners and belt force
limiters
The front seat belts have:
belt tensioners,
belt force limiters.
Belt tensioners
tension the seat belts when activated,
so that they lie tightly across the body.
are only triggered off in collisions
with high vehicle deceleration/accel
eration in the longitudinal direction,
e.g. a head on collision.
> If the airbag indicator light comes
on, your belt tensioner has been ac
tivated.
1 26 Getting acquainted
Belt force limiters
reduce the force exerted by the belt on
the occupants when activated in the
event of an accident.
>Note!
Belt tensioners cannot compensate for:
incorrect seated positions,
seat belts worn incorrectly.
Belt tensioners do not actively pull the
occupants back against the seat back
rests.
The belt force limiter is designed to op
erate in unison with the front airbag,
which absorbs a portion of the seat belt's
decelerating forces, distributing the
load over a larger area.
If the ignition is switched on, the belt
tensioner is activated:
if the restraint systems are operation
al.
in the event of a head on or rear end
collision if the vehicle is decelerated
or accelerated sufficiently in the lon
gitudinal direction at the start of im
pact.