Measuring and testing – Internal combustion engine or related engine system or... – Exhaust system
Reexamination Certificate
2011-07-12
2011-07-12
Kirkland, III, Freddie (Department: 2855)
Measuring and testing
Internal combustion engine or related engine system or...
Exhaust system
C073S023320
Reexamination Certificate
active
07975537
ABSTRACT:
Systems and methods for determining an NH3concentration in exhaust gases from an engine are provided. In one exemplary embodiment, a method includes generating a first signal from an NH3sensor fluidly communicating with the exhaust gases. The method further includes generating a second signal from an air humidity sensor disposed proximate to an air intake manifold of the engine indicating a humidity level. The method further includes determining an air/fuel ratio associated with the engine. The method further includes determining an NH3deviation value in a calibration table based on the second signal and the air/fuel ratio, utilizing a controller. The method further includes determining an NH3concentration value based on the first signal and the NH3deviation value, utilizing the controller. The NH3concentration value is indicative of the NH3concentration in the exhaust gases. The method further includes storing the NH3concentration value in a memory device, utilizing the controller.
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Wang Da Yu
Yao Sheng
Delphi Technologies Inc.
Kirkland, III Freddie
Twomey Thomas N.
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