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1.26
METHODS OF RESTRAINT IN ADDITION TO THE FRONT SEAT BELTS (1/3)
Depending on the vehicle, they are
composed of:
– seat belt pretensioners;
– chest-level load limiters;
– air bags for driver and front pas-
senger.
These systems are designed to act in-
dependently or together when the vehi-
cle is subjected to a frontal impact.
Depending on the severity of the
impact, the system can trigger:
– seat belt locking;
– the seat belt seat belt pretensioner
to hold the occupant in the seat, and
the force limiter;
– the front air bag.
– Have the entire restraint
system checked following
an accident.
– No operation whatso-
ever is permitted on any part of
the system (pretensioners, air
bags, computers, wiring) and the
system components must not
be reused on any other vehicle,
even if identical.
– To avoid incorrect triggering of
the system which may cause
injury, only qualified personnel
from an approved dealer may
work on the pretensioner and air
bag system.
– The electric trigger system may
only be tested by a specially
trained technician using special
equipment.
– When the vehicle is scrapped,
contact an approved dealer for
disposal of the pretensioner and
air bag gas generators.
The passenger air bag protects the
front passenger(s) (depending on
whether there is a conventional seat
or a bench seat in the front).
Pretensioners
With the ignition switched on, if the
vehicle is subject to a significant fron-
tal impact the system may, depending
on the severity of the impact, trigger a
piston which instantly retracts the belt.
The pretensioners hold the seat belt
against the body, holding the occupant
more securely against the seat, thus in-
creasing the seat belt’s efficiency.
Load limiter
Above a certain level of impact force,
this mechanism is used to limit the force
of the belt against the body so that it is
at an acceptable level.
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