Windowbag, component description - GF91.60-P-4041GZ
MODEL 164
When folded up, the corresponding air hose is located in the side roof frame and extends from the A-pillar to the C-pillar.
The windowbag unit consists of a hybrid-type gas generator with the left windowbag squib (R12/16) or right windowbag squib (R12/17) and an air hose. The air hose is divided into multiple air chambers.
The gas generator with the left windowbag squib and the gas generator with the right windowbag squib are located in the left and right A-pillars.
The windowbag supplements the effect of the sidebag in the event of a side-impact collision. It protects the head area of front and rear passengers in the event of a side impact collision or an angled collision.
In inflated state, the windowbag on the driver or passenger side fills up the area between the side windows and occupants.
It prevents the head from oscillating wildly immediately after an impact and thus reduces any acceleration forces that act on the body.
In addition, the air cushion holds back glass splinters and other objects that could penetrate into the passenger compartment in the event of a side impact or a subsequent rollover.
Function
The restraint systems control unit (N2/7) sends an ignition pulse to the squib in the hybrid gas generator. The solid fuel in the fuel chamber is ignited by the squib, which is burning off.
A pressure builds up in the fuel chamber. This pressure causes a bursting disk to be destroyed.
The compressed inert gas mixture can escape from the pressure reservoir through the discharge holes. The gas flowing out is guided at a high pressure in the air hose folded and stored in the roof frame.
The air hose, which is now inflating, tears open the inner paneling at the side roof frame and penetrates into the passenger compartment.
The air hose reaches its full volume within approximately 25 ms This volume remains for approx. 3 to 5 s, ensuring that the protective effect is retained for a sufficiently long period also in the event of subsequent rollovers.
The pressure now begins to drop. The gas escapes from the airbag through a filter and the airbag collapses.