Autoliv Asp, Incorporated

Brian A Laubacher

Bradley W Smith

David J Green

Gregory J Lang

Robert E Lewis

Guy R Letendre

Christopher K Fischer

Elaine C Brewster, Legal Representative

An airbag assembly may include an airbag and an inflator in fluid communication with the airbag. The inflator may have a gas source chamber containing a gas source and a centrifugal flow chamber into which the gas flows from the gas source chamber through a centrifugal flow barrier. As the gas moves through the centrifugal flow barrier, it may be urged to move along a pathway that encircles at least a part of a longitudinal axis of the inflator. The gas may then move toward the longitudinal axis to flow through an orifice of an inward flow barrier. this inward flow may occur at a velocity that is generally too large for entrained particulates. Thus, such particulates may remain in the centrifugal flow chamber. The gas may flow from the orifice into a plenum chamber that releases the gas to the airbag via a plurality of apertures.

Airbag inflation systems and methods

A deployable inflator that includes a quantity of gas generant. The generant is designed to produce a supply of inflation gas during deployment of the inflator. The inflator includes a first burst disk and a second burst disk. The first and second burst disks are separated by a cavity. The inflator also includes an opening (or multiple openings). During deployment, the inflation gas flows into the cavity via the opening(s) and ruptures the first burst disk to allow inflation gas to escape the inflator. The second burst disk ruptures after the pressure in the cavity drops sufficiently below the pressure on the other side of the second burst disk. This inflator reduces the initial onset rate of deployment.

System for tuning initial onset

The present invention relates to an inflator for inflating a cushion of an airbag module. The inflator induces expansion of a gas by application of an electric voltage to the gas or to a plurality of filaments disposed within the gas. The voltage may be applied between a nozzle and a conductor in such a manner that an arc forms within the nozzle. Gas passing through the nozzle then forms an arc-jet that further heats adjacent gas. Multiple gases may be used, including gases designed to combust and/or dissociate to produce additional moles of inflation gas. The voltage may alternatively be applied within the housing in such a manner that a corona is formed in the gas, thereby at least partially ionizing the gas to heat the gas. As yet another alternative, the voltage may be applied to some of the filaments to provide gas expansion via filament combustion.

Electrically controlled airbag inflator apparatus and method

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Pleasant View, UT, United States of America

Brian A Laubacher