Tuesday, March 30, 2010

AIR BAG, como funciona

AIR BAG

Em uma colisão frontal, o motorista e os passageiros de um carro são arremessados para a frente e podem se ferir gravemente ao se chocarem com o volante, o painel ou o pára-brisa. Os air bags, ou almofadas infláveis, protegem as pessoas nos casos de acidente: ejetados do volante ou do painel, se enchem de nitrogênio instantaneamente. O sistema de air bag é formado por sensores eletrônicos, um inflator para produzir nitrogênio e a almofada em si. Os sensores são programados para ignorar as colisões a menos de 16 a 22 km/h. Em um choque forte, a almofada se infla por completo em 1/20 de segundo. Para as pessoas poderem sair, a almofada se esvazia assim que absorve o impacto. Os air bags podem salvar vidas, mas apenas em colisões frontais, sem substituir os cintos de segurança e as ombreiras.

Ao receber os sinais do sensor de colisão, um gerador e calor inflama substâncias químicas para produzir o nitrogênio, que infla o air bag.

Completamente cheio, o air bag absorve o impacto inicial do corpo do motorista, quando este é lançado para a frente.

Tendo protegido o corpo do motorista, o air bag se esvazia, suavizando o impacto. Dois orifícios na parte traseira da almofada deixam escapar o gás.

Fonte: br.geocities.com

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