The side airbag is installed on the outside of the seat. Many manufacturers' models will be equipped with side airbags in the front two seats as standard, but few models are equipped with rear side airbags. In the event of a collision, especially after a side collision, it can alleviate the physical injuries such as fractures caused by the direct collision between the arms and ribs of the rear passengers near the door and the door panel.
The rear airbag is arranged on the side of the rear seat near the window. There are usually seven sensors in the car. When the sensor detects that the vehicle is hit from the side, it will automatically open to protect the safety of the driver or co-pilot. The airbag is mainly composed of sensor, microprocessor, gas generator and airbag. The sensor and the microprocessor are used for judging the collision degree and sending signals; The gas generator generates an ignition action according to the signal indication, ignites the solid fuel and generates gas to inflate the airbag, so that the airbag expands rapidly, and the volume of the airbag is about (50-90) L.
As a passive safety device, the protective function of airbag has been widely recognized. The first patent on airbags began in 1958. 1970, some manufacturers began to develop airbags that can reduce the degree of occupant injury in collision accidents; In 1980s, automobile manufacturers began to install airbags step by step. In 1990s, the number of airbags increased sharply. After entering the new century, cars are generally equipped with airbags. Many people's lives have been saved since the appearance of airbags. The research shows that when a car with airbag device collides head-on, the driver's death rate of large cars is reduced by 30%, that of medium-sized cars by 1 1%, and that of small cars by 20%.