648
INTERIOR
-
Sutwlemental
Restraint System
(SRS)
Inflator
The inflator consists of a squib, igniter, gas
gener-
ants, diffuser screen, etc. contained in an aluminum
container. It is mounted in the air bag module hous-
ing.
The bottom of the inflator is provided with an electri-
cal connection to which an ignition current is sup-
plied. If current is supplied to the squib, a small
amount of explosive in the squib is burnt causing
the igniter to burn, and the resultant heat burns
the gas generants. Combustion of the generants
rapidly produces nitrogen gas which is forced
through the diffuser screen into the air bag. The
diffuser screen serves as a filter to remove cinders
d
and also helps cool down the gas temperature and
reduce the gas generation noise. A shorting pin
is provided in the connector portion of the squib.
Whenever the air bag module is removed, the short-
ing pin makes a short circuit across the terminals
to prevent flow of current caused by static electricity
to the squib.
Diffuser
Igniter
\
Gas
generant
I
To air bag
\
/
To air bag
/////////-
-
Connecto?lock
\
Sq\uib
B&e
Shorting clip
Diffuser screen
e
:
Nitrogen gas
c
:
Flame
19N0233
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