| 摘要 |
The present invention relates to a gas generator for a motor vehicle safety device, the generator comprising:. a first chamber (C) for combustion containing a pyrotechnic initiator (2) and a pyrotechnic charge (3) whose combustion is triggered by said initiator; and. a second chamber (D) for diffusion into which the gas that results from combustion of said charge (3) is transferred prior to being exhausted to the outside; these two chambers (C, D) being separated from each other by a "nozzle" partition (12) presenting at least one communication orifice (13). According to the invention, said diffusion chamber (D) is provided with a piston (5) suitable for closing or not closing said orifice (13) as a function of the gas pressure in the combustion chamber (C), said piston (5) being urged to its position for closing the orifice (13) by a mass (6) of elastically deformable material, said mass (6) presenting stiffness that varies as a function of temperature, said stiffness decreasing with increasing temperature.
|
