How Does a Car's Airbag Deploy?
1 Answers
When an airbag is activated, it generates gas within an extremely short period to fill the internal space of the airbag, which then deploys through gaps in the steering wheel or dashboard to protect the driver. These gaps are typically only 0.05mm thick. Additional details are as follows: 1. Composition: Mainly consists of airbag sensors, collision safety airbags, and electronic control units. The driver-side collision airbag is installed in the steering wheel, while the passenger-side airbag is usually mounted on the dashboard. Airbag sensors are placed on the left, right, and center of the cabin partition; the central sensor and airbag system are integrated with the electronic control unit. The airbag module primarily includes the airbag itself, a gas generator, and an igniter. The electronic control unit is responsible for data collection and processing, diagnosing the airbag's reliability, ensuring timely ignition signals at preset thresholds, and providing sufficient current to drive the gas generator. 2. Activation Conditions: Airbag deployment requires appropriate speed and collision angle. Theoretically, the airbag may only deploy when the vehicle impacts a fixed object within approximately 60 degrees of its front center at speeds above 30 km/h. Note that this speed refers not to conventional vehicle speed but to the relative collision speed against rigid barriers in laboratory tests—actual collision speeds must exceed test speeds for deployment.
