Process for assuring the progressive deployment of an airbag and pyrotechnic charge for use in such a process

摘要

The procedure for inflating an air bag (1) by means of a pyrotechnic gas generator (2) with a charge (9) and igniter (8) linked to a collision detector. The charge (9) is a solid dual-composition charge comprising a main pyrotechnic charge (23) with a linear combustion velocity of at least 25 mm/sec at a pressure of 20 MPa, and with its outer surface covered at least partially by a film of a pyrotechnic compound which adheres to the main charge by simple application. The charge is located in the gas generator so that the whole of the main charge's covered surface acts as a combustion initiation surface when the igniter is set off by the collision detector.