Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature
Reexamination Certificate
2006-05-15
2009-10-06
Lorengo, Jerry (Department: 1793)
Chemistry: electrical current producing apparatus, product, and
Having magnetic field feature
C429S006000, C429S006000, C429S006000, C429S006000, C700S286000, C236S04400R
Reexamination Certificate
active
07597975
ABSTRACT:
A fuel cell system that includes an over-arching algorithm for providing a strategy that reduces relative humidity cycling of the cathode outlet gas between wet and dry operation to extend the useful life of the membrane. The algorithm receives sensor signals indicative of operating parameters of the fuel cell system. The algorithm maintains a cathode exhaust gas relative humidity in a wet operating mode if the operating parameters of the fuel cell system are able to sustain the cathode gas relative humidity above a first predetermined value, and maintains the cathode exhaust gas relative humidity in a dry operating mode if the operating parameters of the fuel cell system are able to sustain the cathode gas relative humidity below a second predetermined value.
REFERENCES:
patent: 2006/0263653 (2006-11-01), Sinha et al.
Fagley John C.
Goebel Steven G.
Pettit William H.
Salvador John P.
GM Global Technology Operations Inc.
Johnson Kevin M
Lorengo Jerry
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