Patent ID: 6412814
Filing Date: 2002-07-02
Classification: B60R

Abstract:
A gas generator for a safety system, in particular for a vehicle occupant restraint system, said gas generator comprising:a combustion chamber filled with propellant, in which a hot gas is generated after igniting and burning of said propellant, a fluid chamber containing a fluid, a mixing chamber in which fluid and hot gas are mixed in a mixture ratio, at least one control device which controls said mixture ratio of fluid and hot gas in said mixing chamber, a pressure chamber separated from said fluid chamber by an ejection piston, compressed gas being introduced into said pressure chamber for displacing said ejection piston, at least a portion of said hot gas forming said compressed gas and this portion arrives into said pressure chamber via at least one conduit, said control device controlling the quantity of compressed gas flowing into said pressure chamber, said conduit being constituted by a central gas conduit pipe through which, after ignition, at least a portion of said hot gas flows out of said combustion chamber to said control device.