Function

Compressed Gas Generator, Front Passenger Seat, Design


Prerequisite
Both ignition squibs of the front passenger seat can be ignited when
- the front passenger seat has been recognized by the occupancy and child seat recognition (B48) has been recognized as occupied and/or
- the buckle latch is engaged on the front passenger seat side

Functional sequence
- Depending on the severity of the impact, the restraint systems control module (N2/7) sends an electrical ignition pulse to one or both ignition squibs (R12/4, R12/5). Again, depending on the type of accident, the ignition squibs can be ignited simultaneously or time-delayed.
- The ignition squib is ignited, creating a high pressure, which is transferred to the respective pressure chamber (1, 2).
- Due to the increased pressure in the pressure chamber, the bursting disk (4) is ruptured. The gas mixture stored in the pressure chamber can escape via the discharge channel (3). The airbag now inflates.
- Under pressure of the inflowing gas, the expanding airbag breaks open the airbag housing and airbag flap over the glove compartment and enters the interior space.
- The airbag reaches its max. volume of approx. 125 l after approx. 40 ms.
- After having reached its max. volume, the pressure in the airbag starts to reduce immediately. The gas escapes from the airbag via a filter and the airbag collapses.


NOTE:
Disposal
Since after actuation of the airbag it is not possible to recognize whether both stages have in fact been ignited, the airbag unit must be disposed of in the correct manner. In Germany the disposal is via the Mercedes-Benz recycling system "MeRSy".
Disposal in other countries must be i.a.w. the legal requirements!