| 摘要 |
A fluid supply is provided for inflating an expandable confinement of a vehicle occupant restraint system of the type activated in response to a vehicle collision signal. The fluid supply includes a housing defining a fluid discharge port for directing fluid flow from the housing and a gas generating material disposed within the housing. The gas generating material includes a sustaining charge comprising a plurality of layers of granulated material, the layers being approximately equal by weight. Screens are disposed between each pair of adjacent layers of the sustaining charge. Each of the screens has a mesh substantially finer than the granules of material in the layer adjacent the screen and oppositely disposed from the fluid discharge port. The sustaining charge is activated in response to a collision signal. Preferably, a filter is included between the fluid discharge port and the layer of granulated material closest thereto and the screens act as intermediate filters to trap any particles of the combustion product which are approximately as large as the original granules, thus preventing too many of these particles from clogging the filter, which would restrict the fluid flow area and cause an undesirable pressure buildup within the housing.
|
