Passenger side air bag with controlled deployment

Abstract

A passenger side air bag exhibits controlled deployment of a vertically elongated frontal surface prior to full inflation. The air bag includes a depending lobe extending downwardly from the inlet opening secured to an inflator module mounted in a dashboard. A portion of the front panel of the air bag is releasably secured, such as by breakaway stitching, to a portion of the rear of the depending lobe, below the inlet opening. Outward deployment of the air bag in an elongated column is prevented by the stitching, and a broad front surface develops early in the deployment and inflation process. The breakaway stitching releases part way through the deployment and inflation process, and the front surface then fills out to full inflation. Higher stitch density in the area of stitching which first releases contributes to controlled deployment.