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During a collision, crash sensors are sending signals to a micro processor in an electronic control unit (ECU), which determines the crash severity. If the crash severity exceeds a predetermined limit, an electrical impuls is sent to the inflator within the airbag module. An igniter in the inflator starts a chemical reaction that produces gas that fully inflates the airbag within 50 thousands of a second, twice the speed of a blink of an eye.
Advanced Autoliv airbag systems are able to adjust the deployment depending on crash severity, passenger size and seating position.
The airbag automatically deflates within a few tenth of a second as the gas escapes through vents. |