Exhaust Aftertreatment Control System And Method For Maximizing Fuel Efficiency While Reducing Emissions
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Mar 13, 2013
filing date -
Mar 13, 2013
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Abandoned
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Abstract
An engine exhaust treatment and fuel efficiency improvement system includes a NOx module that determines a quantity of NOx emitted from an engine. A selective catalytic reduction (SCR) efficiency module determines a SCR efficiency to reduce the determined NOx quantity below a predetermined threshold. A reagent dosing module determines a quantity of reagent required to reduce the NOx quantity below the predetermined threshold. An injection optimization module determines whether an increase in system operating efficiency may be obtained by changing an injected reagent quantity and an engine operating parameter in cooperation with each other while maintaining the NOx quantity below the threshold, the system being operable to change the reagent injection quantity and engine operating parameter to increase system efficiency.
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