CURTAIN AIR BAG MODULE CONSTRUCTION/OPERATION


BHE081000171T02

Construction

• The curtain air bag modules are equipped along the roof edge between the A and B pillars.

• The curtain air bag module is composed of the inflator, pipe, bag cover, and air bag.

• When the curtain air bag deploys, the A-pillar trim and headliner is spread apart by argon gas generated from the inflator, inflating the air bag.

1
Curtain air bag module
2
Inflator
3
Pipe
4
Air bag cover
5
Air bag

Operation

Air bag module deployment operation

• Refer to SAS UNIT DESCRIPTION, Air Bag Module and Pre-tensioner Seat Belt Deployment Operation. (See SAS UNIT CONSTRUCTION/OPERATION.)

Inflator operation

1. The igniter built into the inflator begins to build up heat when the operation (deployment) signal is sent from the SAS unit. The inflation agent is ignited by the build up of heat in the igniter.

2. The argon gas expands due to the heat of the ignited inflation agent.

3. The expanding argon gas breaks the discharge barrier, is cooled and filtered by the filter, and then injected into the air bag.

1
Ignitor
2
inflation agent
3
Combustion of inflation agent
4
Argon gas
5
Argon gas expansion
6
Discharge barrier
7
To air bag