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82 Body
9-5
Passenger airbag
The passenger airbag is standard on all Saab 9-5
models in all markets.
The passenger airbag is dual-stage type. This
means that it can be inflated in two stages at
different pressures depending on the force of the
impact and the position of the seat.
If the seat is in a forward position, i.e. less than
30% from its front position, stage 1 will be
inflated. This means that only 80% of the
maximum pressure in the airbag will be utilized.
This function is an adaptation of the personal
protection system, i.e. the protection will be
optimized according to the present circumstances
and the airbag will not be inflated to full pressure
if the seat occupant is sitting far forward.
With the seat in a rearward position, i.e. more
than 30% from its front position, stage 2 will be
inflated. This means that 100% of the maximum
pressure in the airbag will be utilized.
The passenger airbag consists of a gas
generator and an airbag. It has a volume of
approx. 120 l (4.2 cu.ft.). The airbag is screwed
to the dashboard and held in place with fabric foil.
The wiring harness is connected to a 4-pin
connector that branches off to two 2-pin
connectors on each igniter.
The gas generator comprises a steel housing
with two electric igniters with individual coding,
two pyrotechnical ignition charges of different
strengths for stage one and stage two,
pressurized gas, and a gas distributor for cooling
and distributing the gas pressure.
After an activation command, the control module
will apply a current to ignite the driver charges. In
stage 1, a projectile (1) is shot through a
diaphragm (2), which opens the pressure vessel
(3) containing the gas mixture. The projectile
continues on its path and ignites the 28g driver
charge for stage 1 (4). The compressed gas will
expand due to the heat release and pass the gas
distributor (6) before reaching the airbag.
When stage 2 is activated, a 6g charge (5) will be
ignited by an electric igniter and heat the
compressed gas even more.
The gas generator is divided into two stages.
These stages are a primary stage that provides
80% of the pressure and a secondary stage that
provides another 20%. Depending on the
information that the control module receives from
the different sensors, the two stages will ignite at
different times. See control module information
The gas composition is
• 70% argon
• 20% nitrogen
• 10% helium
Seat-belt tensioners
U.S. specification vehicles have a new type of
seat-belt tensioner with new internal tuning in the
torsion section.
This tensioner is not compatible with previous
model year vehicles.