When the automobile collides with an obstacle, is called a collision, the occupant collides with the interior member, known as a secondary collision, the airbag in a collision, a cushion filled with gas quickly opened before the secondary collision, the occupant when moving by inertia “flutter in the air cushion” in order to ease the impact by the occupant and absorb impact energy, reduce the degree of harm occupants.
1. The front head airbags Glossary
Head called side curtain air bags, pop-up cover windows when a collision, the head directly hit the barrier near the front passenger rigid member , the inertia of the lateral displacement of the head cushion, cervical and head protection safety. The position of the front windshield head airbags typically steel beam sides (inside). Note that only the air bag and seat belt fit together so that passengers can get the best protection in a major accident.
curtain airbag (CAB) for protecting the head of the vehicle occupant when the vehicle side collision. CAB component assembly is composed of a bag, cloth bag, the gas generator, the composition of the gas generator stents and catheters. When the car in a side collision and reached the condition of the air bag should be deployed, CAB module is designed to multiplyMembers of the expanded head, the interior of the module with the gas to expand due to internal pressure, the gas to expand at a fixed position with inflated to protect a passenger’s head
2. Airbag Chemistry principle
there sodium azide (of NaN3) or ammonium nitrate (of NH4NO3) like in automobile airbag material. When subjected to crashing car at high speeds, these substances decomposition reaction occurs rapidly, a large amount of gas, the airbag is filled.
airbag as a passive safety devices, protective effect has been widely recognized that people first patent related to airbag began in 1958. In 1970 alone the manufacturers started to develop can reduce collisions in the degree of injury of a passenger airbag; in the 1980s, automobile manufacturers began fitted with airbags; into the 1990s, put the amount of airbags rose sharply; while entering the new century later, in general it is equipped with airbags on cars. Since airbags available, it has saved many lives. Studies have shown that frontal air bag device car crash, the driver of mortality, big cars reduced by 30 percentage midsize sedan by 11 percentage small cars reduced by 20 percentage.