Cummins Emission Solutions Inc.

Alain Ngoy Tschimwang

Jinqian Gong

James C Clerc

Premjee Sasidharan

Todd A Corbet

Bryon D Staebler

Santosh Kumar Ratan

David C Hall

Marc Alexander Greca

Rohil Daya

Karthik Venkata Rama Krishna Dadi

Bradley V Jones

A controller for controlling operation of an aftertreatment system that is configured to treat constituents of an exhaust gas produced by an engine, the aftertreatment system including a selective catalytic reduction (SCR) catalyst, the controller configured to: generate a short-term cumulative degradation estimate of the SCR catalyst corresponding to reversible degradation of the SCR catalyst due to sulfur and/or hydrocarbons based on a SCR catalyst temperature parameter; generate a long-term cumulative degradation estimate of the SCR catalyst corresponding to thermal aging of the SCR catalyst based on the SCR catalyst temperature parameter; generate a combined degradation estimate of the SCR catalyst based on the short-term cumulative degradation estimate and the long-term cumulative degradation estimate; and adjust an amount of reductant and/or an amount of hydrocarbons inserted into the aftertreatment system based on the combined degradation estimate of the SCR catalyst.

Controller and method for controlling operation of an aftertreatment system based on short-term and long-term cumulative degradation estimates

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Indianapolis, IN, United States of America

Alain Ngoy Tschimwang