Inflator capable of modulation air bag inflation rate in a vehicle occupant restraint apparatus
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United States of America Patent
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Mar 14, 2000
Grant Date -
N/A
app pub date -
Dec 19, 1997
filing date -
Feb 3, 1997
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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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Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- GENERAL DYNAMICS-OTS, INC.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Brown, Steven Joseph | Pittsfield, MA | 5 | 97 |
Ingram, Larry Stefan | Lawrenceville, NJ | 3 | 80 |
Messina, Neale Arthur | Philadelphia, PA | 4 | 91 |
Tarczynski, Marek | Princeton, NJ | 5 | 57 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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