Land vehicles – Wheeled – Attachment
Patent
1997-12-19
2000-03-14
Mai, Lanna
Land vehicles
Wheeled
Attachment
280742, 280741, B60R 2126
Patent
active
06036226&
ABSTRACT:
In an occupant restraint apparatus for installation in a vehicle, a smart airbag inflator is provided with a piston for regeneratively pumping liquid propellant from a reservoir into a combustion chamber for ignition and combustion to generate airbag inflation gases. To control the airbag inflation rate, the piston includes a piston head slidingly received in a damping chamber filled with a magneto-rheological fluid that is pumped through an orifice during the regenerative pumping stroke of the piston. An electromagnet is selectively energized to produce a varying magnetic field to adjust the viscosity of the magneto-rheological fluid flowing through the orifice and thus vary a damping force exerted on the piston stroke, thereby modulating the rate of liquid propellant combustion. Electromagnet current excitation is controlled in response to a particular accident scenario.
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Article entitled faults and failures, IEEE Spectrum Magazine, p. 17, May 1997.
Brown Steven Joseph
Ingram Larry Stefan
Messina Neale Arthur
Tarczynski Marek
General Dynamics Armament Systems, Inc.
Mai Lanna
Ririe Andrew J.
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