Reductant apportionment for multi-dosing architectures
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United States of America Patent
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Feb 27, 2018
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app pub date -
Dec 31, 2015
filing date -
Dec 31, 2015
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Abstract
A system for apportioning reductant dosing amounts in multi-doser architectures includes an engine, an aftertreatment system in fluid communication with the engine, and a controller. The aftertreatment system includes a first doser configured to dose reductant into a first decomposition reaction member and a second doser configured to dose reductant into a second decomposition reaction member. The controller receives engine operating conditions and determines a total reductant amount based on the engine operating conditions. The controller also apportions the total reductant amount into a first apportioned reductant amount based on a first maximum reductant dosing amount for the first doser and a second apportioned reductant amount based on a second maximum reductant dosing amount for the second doser. The controller outputs a first apportioned reductant dosing command to the first doser and a second apportioned reductant dosing command to the second doser.
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