Ilmapussien

Ilmapussien is Finnish for airbags, safety devices designed to inflate rapidly during a vehicle collision to cushion occupants. They are a common component in modern motor vehicles and are also used in some aircraft seating and other equipment to reduce injury.

How they work is based on rapid deployment. When sensors detect a crash, an airbag inflator ignites or releases gas, filling a fabric bag that unfolds between the occupant and the hard surfaces of the vehicle. The inflation occurs within milliseconds, creating a soft protective layer that helps limit contact forces on the head, chest, and limbs. After inflation, the airbag deflates quickly to allow visibility and movement.

Types of airbags include frontal, side, curtain (head) airbags, and knee or pelvis airbags. Frontal airbags are placed in the steering wheel and dashboard, while side airbags protect the torso in collisions. Curtain airbags deploy from the roof lining to shield the head in side impacts or rollovers. Some vehicles also include knee airbags to support proper seating position and reduce leg injuries.

Materials and construction typically involve a nylon or another strong fabric for the bag and a compact inflator unit. Inflation gas is usually nitrogen produced by a gas generator. Early airbags relied on toxic propellants such as sodium azide; modern systems use safer formulations with reduced toxic byproducts.

Overall, ilmapussien are integral to automotive safety, designed to work in concert with seat belts. They are not a substitute for belts, and correct seating, child restraints, and maintenance are essential for effectiveness.