Systems and methods for measuring exhaust gas species and SCR catalyst NOx storage for SCR-related controls and diagnostics

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United States of America Patent

PATENT NO 11828218
SERIAL NO

17592770

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Abstract

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Systems, apparatuses, and methods include a controller for an exhaust aftertreatment system including a SCR catalyst in exhaust gas-receiving communication with an engine and at least one reductant dosing system structured to provide reductant to the exhaust gas. The controller is structured to determine a concentration of one or more of NO and NO2 at or proximate an inlet of the exhaust aftertreatment system and based on a dynamic model of the SCR catalyst, information indicative of a concentration of NOx at or proximate an outlet of the exhaust aftertreatment system, and information indicative of an amount of stored reductant in the SCR catalyst. The controller is further structured to command the at least one reductant doser to increase, decrease, or maintain an amount of reductant provided to the exhaust gas based on the determined concentration of one or more of NO and NO2 in the exhaust gas.

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Patent Owner(s)

  • CUMMINS INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cunningham, Michael J Greenwood, US 37 484
Currier, Neal W Columbus, US 49 519
Joshi, Saurabh Yashwant Columbus, US 2 1
Nusawardhana, Antonius Padua Columbus, US 2 1
Yezerets, Aleksey Columbus, US 60 547

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