Adaptive output passenger disk inflator

A passenger side vehicular inflatable restraint system inflator device comprising:

• a housing, the housing having a disk form and defining a first chamber having a cylindrical outer wall, the first chamber in a static state containing a quantity of a first gas generant material ignitable to produce first combustion products including a first inflation gas, the housing including a plurality of rows of spaced apart gas exit ports in the cylindrical outer wall, the gas exit ports adapted to permit passage of the first inflation gas from the inflator device into an associated inflatable airbag cushion;
• the first chamber containing at least one inflation gas-permeable treatment element disposed between the quantity of the first gas generant material and the spaced apart gas exit ports, wherein passage of gas through the treatment element results in treatment thereof;
• the first chamber also containing a second chamber, the second chamber in a static state having an enclosed volume containing a quantity of a second gas generant material ignitable to produce second combustion products, the second chamber having a lid closure adapted to permit fluid communication of the second combustion products with the contents of the first chamber;
• a first igniter assembly operatively associated with the first chamber, the first igniter assembly comprising a first initiator device and a supply of igniter material housed in a first igniter assembly housing, wherein actuation of the first initiator produces a discharge in reaction initiating communication with at least a portion of the supply of the igniter material housed within the first igniter assembly housing and wherein the first igniter assembly housing includes a plurality of openings to permit passage of igniter material reaction products therethrough and into reaction initiating communication with at least a portion of the quantity of the first gas generant material contained in the first chamber;
• and
• a second initiator device operatively associated with the second chamber;
• the inflator device discharging sufficient inflation gas to inflate a passenger inflatable airbag cushion, wherein the inflator device discharges at least 2 moles of inflation gas.