An airbag is, as we all know it, a vehicle safety device. This fairly simple, but effective occupant restraint system consists of flexible fabric bag, widely-known as an airbag cushion.
This thing is designed to inflate quickly and rapidly deflate afterward, during an impact or a collision with another object. Its one and only purpose is to provide protection and restrain during a crash event.
The air bag in a vehicle is controlled by a central Airbag control unit (ACU). This until monitors several related sensors within the vehicle including wheel speed sensors, impact sensors, seat occupancy sensors and brake pressure sensors.
Once the “threshold” has been exceeded, the ACU triggers the ignition and the fabric bag rapidly inflates.