Audi Q7 361 - Page 23

Fr ont passenger side airbag igniter I - N131
T h e airbag contr o l unit en er gizes the ign i ter I and the priming c h ar g e I is ig nited. T h is in tur n ig nites the
ac tu al pr ope l la nt c h ar g e I . T h e c o mb ustio n g a s ge ner a ted incr ea ses the pr e ssur e in the c o mpr e sse d ga s
cylinder until the burst disc br ea ks at a pr e determin e d pr essur e value . T h e ga s mixtur e r e ac hes the airbag via
the metal f i lter and it is deployed.
P r iming c h ar g e I P r opella nt c h arge I C oil spring Bu rst d i sc
Fil t e r
Ig niter I
361 _ 003
Fr ont passenger side airbag igniter II - N132
T h e oper ating principle of the second sta g e is identic a l t o that of the f i rst. An additional vo lume of ga s is
supplied t o the airbag thr ou gh co mbustion o f the s e co nd pr opella nt c h arge . T h er e is no fur t her in cr ea se in
pr essur e inside th e airbag durin g th e sec o nd stage.
Fil t e r
Ig niter II
P r i m i ng c h a r ge II P r o p el l a n t cha r ge II C o il sp r i ng Bu r s t d i sc
361 _ 004
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