Sistema de bolsa de ar para um veículo motor e processo de operação de um inflator de bolsa de ar de níveis múltiplos em um tal sistema

摘要

A vehicle air bag system including an inflator (10) having a first chamber (14) containing pressurized gas and a second chamber (30) containing an initiator (82), an oxidant and a fluid fuel in a container (61). First chamber exit openings (46, 48) are closed by a first rupturable disc (50) which can be ruptured by a projectile (88) from an opening device (45b). A second rupture disc (72) covers an opening leading from the second chamber (30) to the first chamber (14). The fuel may be gaseous, liquid or powdered. The system also includes one or more sensors for sensing: ambient temperature, occupant presence, seat belt usage or deceleration. Depending on output of the sensors, inflator actuation either results in delivery of gas from the first chamber (14) only or delivery of combustion products from the second chamber (30) in addition to gas from the first chamber (14).