Supplemental airbag venting for passenger side airbag
Publication Date: 2009-Mar-30
The IP.com Prior Art Database
A deployment flap includes a fabric or other flexible, foldable material; a plurality of securement tabs each having a weakened area; and a cover area defined in the fabric. The fabric is connectable to the inflatable cushion to cause the inflatable cushion to be biased in a selected direction upon inflation of the inflatable cushion. The cover area covers the inflatable cushion prior to inflation of the inflatable cushion. The securement tabs secure the fabric to a retainer. The weakened area releases the fabric from the retainer upon the inflation of the inflatable cushion.
Use of Supplemental venting for passenger airbags
Conventional passenger airbags use vents located in the side of the airbag to control the release of internal gas pressure to absorb occupant energy during a crash.
This document outlines a method for adding a supplemental vent that during normal deployment is closed, but in so called "out of position" deployments allows the gas to exhaust. This reduces the internal bag pressure and hence the loading to the OOP occupant.
Flap vent added to area on top panel which would only engage with the windshield when the cushion is compressed against the windshield due to normal in position occupant loading.
Left hand section shows the cushion shape where the OOP occupant has held the bag away from the windscreen allowing the vent to stay open and exhaust gas, whereas right hand section shows the bag against the windscreen with the supplemental vent closed
This method of supplemental venting may enhance the passenger airbag performance enabling reduced requirements for suppression systems.
Typical supplemental vent
Flap stitched along 2 sides
Gas flow when open