Audi Q7 361 - Page 21

Driv er side airba g ign i ter I - N95
T h e electric al igniter I, which is activated by the airbag contr o l unit, igni tes the priming c h ar g e I. T h i s ig nites the
actual pr opellant c h arge I via the bor es. When the ga s pr essur e gener a ted th r o ugh co mbustio n of the
pr opella nt c h arge I e x ceeds a specified thr e shold, the housing of the ga s g e ner a t o r becomes d e f ormed,
o p eni ng up a pa ssa ge t o the ai r b ag vi a the me tal f i l t er . T h e ai r b ag i s deplo y e d .
P r iming c h ar g e I Ho u s i ng
Metal f i lter
Pr o p e ll a n t
ch a r g e I
Bor e s
Metal f i lter
P r opella nt c h a r ge I
361 _ 015
Ig nit e r I
Driv er side airba g ign i ter II - N250
F o llowing a def i n e d delay , the airbag con t r o l unit ener gise s the seco nd electric a l ig niter , which dir e ctly igni tes the
second pr opellant c h ar ge. At a c e r t ain p r essur e , the gene r a ted ga s lif t s up th e c a p of the second stage
and f l ows int o the airb ag via the combustion c h amber o f the f i rst stage.
C a p P r opella nt c h arge II
Metal f i lter
Co mb u s t i o n
ch a mb e r
Pr o p e ll a n t c h a r g e I
Metal f i lte r
Co mb u s t i o n
ch a mb e r
P r opella nt
ch a r g e I
Igniter II
361 _ 013
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