How much impact does the airbag of a car usually have to explode?

The airbag can only be deployed when the vehicle hits a fixed object about 60 straight ahead and the vehicle speed is higher than 30 km/h.. The speed mentioned here is not the speed we usually understand, but the speed at which the vehicle collides with a relatively rigid fixed obstacle in the laboratory. In the actual collision, the speed of the vehicle is higher than the test speed before the airbag can be opened.

principle

When a car collides during driving, the airbag sensor first receives the collision signal, and as long as it reaches the specified strength, the sensor will act and send a signal to the electronic controller. After receiving the signal, the electronic controller compares it with the original stored signal, and if the airbag deployment condition is met, the driving circuit sends a start signal to the gas generator in the airbag module.

After receiving the signal, the gas generator ignites the gas generant to generate a large amount of gas, which enters the airbag after filtering and cooling, so that the airbag can break through the buffer pad and expand rapidly in a very short time, form an elastic air cushion in front of the driver or passenger, and leak and contract in time to absorb the impact energy, thus effectively protecting the head and chest of the human body from injury or reducing the degree of injury.

Modern cars not only add side anti-collision airbags, but also make continuous progress in airbag fabric materials, igniter and sensor technology.

Extended data:

Proper use of airbags

Airbags must be used with seat belts. If the seat belt is not fastened properly, even if there is an airbag, it may cause serious injury or even death in the collision.

Keep a proper distance from the airbag when riding.

Do not place items in front of, above or near the airbag. Be careful not to place items in front of, above or near the airbag, because these items may prevent the airbag from expanding or being thrown out in an emergency, causing greater danger.

In order to ensure the safety of airbags, drivers and passengers must develop good driving habits and keep their chests at a certain distance from the steering wheel.

The components of the airbag device to avoid high temperature should be properly kept and should not be placed in a high temperature environment above 85 degrees for a long time.

Do not change the airbag system and its surrounding layout without authorization, do not change the wiring and components of the system, and do not change the bumper and front structure of the vehicle without authorization.

Airbags are disposable products, and each airbag can only be used once. After detonation, it must be returned to the factory for a new airbag.

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