How does the airbag deploy?
2 Answers
Airbags deploy through sensing intensity. If the required intensity is reached, it is transmitted to the electronic controller, which then makes a comparison. Once the intensity meets the criteria, the drive circuit is activated, sending a signal to the gas generator in the airbag module. The gas generator ignites to produce gas, which is then filtered and cooled before breaking through the airbag membrane, causing the airbag to deploy. Generally, all cars are equipped with airbags, but higher-end models have more than lower-end ones. Mid-to-high-end models typically have 4 to 8 airbags, while lower-end models may only have two. Airbags must be used in conjunction with seat belts to be effective. If the seat belt is not fastened when the airbag deploys, the deploying airbag can cause injury to passengers in the car. Therefore, the first thing to do when getting into a car is to fasten the seat belt.
How does the airbag deploy? As an enthusiast who frequently tinkers with car design, I find this process quite ingenious. The vehicle is equipped with small sensors, including accelerometers, which continuously monitor the car's movement. In the event of a severe collision, such as a high-speed rear-end impact, the sensors detect sudden and intense deceleration or impact force, instantly sending a signal to the control unit. After processing the signal, the control unit immediately ignites the chemical substances in the gas generator, typically releasing a large volume of nitrogen or other inert gases within milliseconds. The airbag rapidly inflates and deploys, covering the steering wheel or dashboard, providing a cushioning effect before the occupant hits the surface. This requires precise electronic coordination to avoid false triggers. Airbags are designed for single-use only and must be replaced after deployment. When used in conjunction with seat belts, they are even more effective, collectively improving survival rates.
