A pyrotechnic gas generator for car safety

摘要

The generator comprises a tubular case (1) subdivided internally by a partition (5) separating a combustion chamber (30) containing a pyrotechnic charge (3) and an ignitor (2) from a plenum chamber (40) communicating with a discharge opening (9). A nozzle orifice (55) passes through the partition (5) to allow hot gas to flow in controlled manner from one combustion chamber (30) to the other (40). The generator is remarkable in that the partition (5) comprises a peripheral portion (50) of high mechanical strength that is secured to the case (1), and a central portion (51) of lower mechanical strength that receives said orifice (55), and that is suitable for deforming or even breaking under the effect of excess pressure inside the combustion chamber (30). The invention relates to safety equipment for motor vehicles, in particular for inflating an airbag.