When a car crashes while driving, the airbag sensor first receives the impact signal. As long as the specified intensity is reached, the sensor will act and send a signal to the electronic controller. After the electronic controller receives the signal, it compares it with the original stored signal, and if the airbag deployment condition is reached, the driving circuit sends a start signal to the gas generator in the airbag assembly. After the gas generator receives the signal, the gas generating agent is ignited, and a large amount of gas is generated. After filtering and cooling, it enters the airbag, so that the airbag can break through the cushion and expand rapidly in a very short time, forming an elastic air cushion in front of the driver or occupant. , and leak, shrink and absorb impact energy in time, so as to effectively protect the head and chest of the human body from injury or reduce the degree of injury.
Modern cars have not only added side-impact airbags, but also continued to develop and improve airbag fabric materials, igniters, and sensor technology.