Chemistry: electrical current producing apparatus – product – and – With measuring – testing – or indicating means
Reexamination Certificate
2005-01-11
2005-01-11
Bell, Bruce F. (Department: 1746)
Chemistry: electrical current producing apparatus, product, and
With measuring, testing, or indicating means
C205S335000, C205S343000, C205S787500, C204S424000, C204S433000
Reexamination Certificate
active
06841292
ABSTRACT:
A method and apparatus estimate hydrogen concentration in a reformate stream produced by a fuel processor of a fuel cell. A sensor measures carbon monoxide, carbon dioxide, and water in the reformate stream. A fuel meter controls fuel input to the fuel processor. An air meter controls air input to the fuel processor. A water meter controls water input to the fuel processor. A transport delay estimator recursively estimates transport delay of the fuel processor. A hydrogen estimator associated with the transport delay estimator, the air, water and fuel meters, and the sensor estimates hydrogen concentration in the reformate stream. The hydrogen estimator includes a fuel processor model that is adjusted using the estimated transport delay. The carbon monoxide, the carbon dioxide and the water are measured using a nondispersive infrared (NDIR) sensor.
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Nelson Patricia J.
Sinha Manish
Bell Bruce F.
Brooks, Esq. Cary W.
Deschere, Esq. Linda M.
General Motors Corporation
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