Gas generator for activating airbag of motor vehicle, has storage chambers for storing respective gases or gas mixtures, and igniter activated to cause liberation of gases, their mixtures and their ignition and activation of safety device

摘要

The generator (1) has a storage chamber (2) for storing gas or reactive gas mixture at specific initial pressure. Another storage chamber (3) stores another gas or reactive gas mixture that reacts with the former gas or gas mixture, at another initial pressure. An igniter (5) is activated to cause simultaneous or quasi-simultaneous rupture of storage caps (21, 31), when pressure at the interior of a cylindrical diffusion chamber (4) is less than a threshold, liberation of the gases, their mixtures and their ignition and activation of a safety device i.e. airbag. The gas or reactive gas mixture in the storage chamber (3) is selected from hydrogen, methane and a mixture of hydrogen or methane with helium, nitrogen, carbon dioxide or argon. The gas or reactive gas mixture in the storage chamber (2) is selected from oxygen, air and a mixture of oxygen or air with helium, nitrogen, carbon dioxide or argon.