Pyrotechnic gas generator for motor vehicle safety device e.g. airbag trigger, has combustion chamber with piston and hollow rod for increasing and reducing volume of chamber when temperature increases and reduces, respectively

摘要

The generator has a combustion chamber (C) provided with a piston (5) and a hollow rod (6) for increasing and reducing the volume of the chamber when temperature increases and reduces, respectively, without modifying the overall volume of the generator. The piston is connected to the rod mounted movable through a communication orifice (120) of a partition (12). An elastomer mass (7) presenting a variable stiffness is intercalated between the piston and the partition.