How does the airbag deploy?

[DiJosie]

When a certain level of collision occurs at the front of the vehicle, the airbag will deploy. Upon collision, the airbag controller identifies and assesses the intensity of the impact based on acceleration signals from sensors. If the collision intensity meets the designed conditions, the sensor triggers the igniter to rapidly inflate the nitrogen solid particles, forming an expanding air cushion that opens the airbag. Below are the conditions for airbag deployment: 1. Vehicle speed: Generally above 50 km/h, but the key factor is the acceleration during the collision (in national certification tests, the instantaneous acceleration is approximately -40g). 2. Frontal impact. 3. Collision object: Rigid walls or obstacles. 4. Deployment time: Within tens of milliseconds after the collision. 5. Rigidity of the collision object: A vehicle hitting a wall at 50 km/h differs significantly from hitting a sand pile, so 50 km/h is only a relative speed. The airbag will only deploy automatically if the actual collision meets the required conditions.