Oxygen correction for engine-out NOx estimates using a NOx sensor of an aftertreatment system

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United States of America

PATENT NO 10539058
APP PUB NO 20180216512A1
SERIAL NO

15747592

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Abstract

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An aftertreatment system comprises a SCR system including at least one catalyst. A NOx sensor is positioned downstream of the SCR system. A controller is configured to determine an estimated engine NOx amount in the exhaust gas produced by an engine fluidly coupled to the aftertreatment system. The controller interprets an output value indicative of a first amount of oxygen in the exhaust gas downstream of the SCR system. The controller determines an adjusted engine NOx amount in response to the output value. A NOx sensor is positioned downstream of the selective catalytic reduction system and communicatively coupled to the controller. The NOx sensor is structured to provide the output value.

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Patent Owner(s)

Patent OwnerAddress
CUMMINS EMISSION SOLUTIONS INC500 JACKSON STREET COLUMBUS IN 47201

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Khaled, Nassim Decatur, US 28 20
Naik, Priya San Diego, US 2 2
Srinivasan, Sriram Greenwood, US 89 989

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