All cars have airbags.
The electronic control of airbag system is a passive safety protection system (see automobile safety performance), which can provide effective collision protection for passengers when used in conjunction with seat belts. When a car collides, the car airbag can reduce the head injury rate by 25% and the face injury rate by about 80%.
The airbag was first proposed by Hetrick in August 1953, and obtained the patent of "automobile buffer safety device" in the United States. With the formulation of automobile safety standards in various countries, the deployment rate of airbags is getting higher and higher. The deployment rate of automobile airbags in Europe, America, Japan and other countries has reached nearly 100%.
It is mainly composed of airbag sensor, anti-collision airbag and electronic control device. The driver side anti-collision airbag device is arranged in the steering wheel; The passenger side anti-collision airbag device is generally installed on the instrument panel. Airbag sensors are respectively installed at the left, right and middle of the cab partition; The airbag sensor and airbag system in the middle are installed together with the electronic control device. The airbag module is mainly composed of airbag, gas generator and igniter. The electric control device is used to collect and process data, diagnose the reliability of the airbag, ensure that the ignition signal is sent out in time when the preset value is reached, and ignite at the appropriate time to ensure that the driving gas generator has enough driving current.