Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Reexamination Certificate
2007-03-27
2008-12-30
Wolfe, Jr., Willis R. (Department: 3747)
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
C123S679000, C701S109000
Reexamination Certificate
active
07469693
ABSTRACT:
A method and system controls engine-out exhaust species of a combustion engine having a plurality of cylinders. The method typically includes various combinations of steps such as controlling combustion parameters in individual cylinders, grouping the individual cylinders into a lean set and a rich set of one or more cylinders, combusting the lean set in a lean combustion parameter condition having a lean air:fuel equivalence ratio, combusting the rich set in a rich combustion parameter condition having a rich air:fuel equivalence ratio, and adjusting the lean set and the rich set of one or more cylinders to generate net-lean combustion. The exhaust species may have elevated concentrations of hydrogen and oxygen.
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Graves Ronald L.
Huff Shean P.
Parks, II James E.
West Brian H.
Hoang Johnny H.
Luedeka Neely & Graham P.C.
UT-Battelle LLC
Wolfe, Jr. Willis R.
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