| abstract |
The present invention provides a gas generator in which the entire size of a container is small, the generator can be produced easily with a simple structure, the output of a gas generator is equalized so that an occupant can be safely restrained, and the combustion performance can be stably adjusted. n A gas generator for an air bag comprises a housing forming an outer shell container and accommodating two or more ignition means to ignite on an impact and two or more gas generating means which are to be independently ignited and burnt by the ignition means so as to generate a combustion gas for inflating an air bag, and a plurality of gas discharge ports which are formed in the housing, wherein the gas discharge ports are closed by sealing means for maintaining an internal pressure of the housing to the given pressure, a breaking pressure for breaking the sealing means is adjusted at multiple stages by controlling gas discharge ports and/or sealing means, and a difference of the maximum internal pressures in the housing at activation of the respective igniters is suppressed. |