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DOE OSTI · 1483376

Engine control systems and methods for nitrogen oxide reduction

Sczomak, David P.·Gallon, Robert J.·McAlpine, Robert S.·Solomon, Arun S.
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Abstract

A fuel control module controls fuel injection of an engine based on a predetermined lean air/fuel ratio. The predetermined lean air/fuel ratio is fuel lean relative to a stoichiometric air/fuel ratio for the fuel. A cylinder control module selectively deactivates opening of intake and exhaust valves of M cylinders of the engine to increase removal of nitrogen oxide (NOx) from exhaust. M is an integer greater than 0 and less than a total number of cylinders of the engine. The fuel control module further: disables fueling of the M cylinders while opening of the intake and exhaust valves of the M cylinders is deactivated; and, while fueling of the M cylinders is disabled and opening of the intake and exhaust valves of the M cylinders is deactivated, controls fuel injection of other cylinders based on a predetermined rich air/fuel ratio that is fuel rich relative to the stoichiometric air/fuel ratio.

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BibTeXRIS

Sczomak, David P., Gallon, Robert J., McAlpine, Robert S., Solomon, Arun S.. 2018-09-18. Engine control systems and methods for nitrogen oxide reduction. https://www.osti.gov/biblio/1483376

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