What is the sequence of events in a vehicle when the air bag inflates due to impact?

Question

by events I mean:
brakes applied,ignition off, etc.

Answer 1

SRS (airbags) deploy when a vehicle reaches set negative acceleration parameters programmed into the computer, meaning the moment the vehicle comes into contact with another object the sensor/arming and control module calculates vehicle speed, point of impact and loss of speed all in a few milliseconds. If all of these factors meet certain criteria programmed into the computer then the airbag deploys. This is why the airbag does not deploy when being driven slowly, a rear collision, a rollover or dropping off a curb. Most if not all modern SRS have to be 'armed', (the ignition must be on) unlike the early days when Ford systems were armed at all times.

Answer 2

Ignition on bag will deploy at set amount of gforce sent thru center line of car or truck. Will not deploy if gforce is more than 15% off center of car or truck.By saying 15% off center thats total front of the car or truck. If the gforce comes in not center mass its a good chance air bag will not deploy.The arming sensors can tell the differance between front and not front to deploy air bag.Also system has its own battery back up in case the main battery is damaged in crash.

Answer 3

The airbags go off and the inertia switch kills the electric fuel pump. Then you call the insurance company and hope it wasnt your fault....