Cummins Emission Solutions Inc.

David C Hall

Jinqian Gong

Jason Alan Drost

James C Clerc

Premjee Sasidharan

James Goss

Scott Lubenow

Bryon D Staebler

Todd A Corbet

Santosh Kumar Ratan

Robert W Nowicki

Michael J Welp

Aashish Wadke

Marc Alexander Greca

Jamie Zenger

Jonathan Steele

Bradley V Jones

Rohil Daya

Karthik Venkata Rama Krishna Dadi

Alain Ngoy Tschimwang

Michael Lamps

Kyle Ebbe

Pat Klein

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

An aftertreatment subsystem includes first and second mounting interfaces, a fluid inlet and fluid outlet interface, and aftertreatment components, each having a central axis and axial extent. The central axes for the aftertreatment components are substantially parallel. End caps define fluid chambers that fluidly couple upstream aftertreatment component outlets with downstream aftertreatment components inlets. The end caps are positioned at a first or second end of the aftertreatment components. A first bracket joins the aftertreatment components at an axial position closer to the first end than to a center of the axial extent of any of the aftertreatment components and a second bracket joins the aftertreatment components at an axial position closer to the second end than to the center of the axial extent of any of the aftertreatment components. The first mounting interface is on the first bracket, and the second mounting interface is on the second bracket.

Aftertreatment manifold device

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Columbus, IN, United States of America

David C Hall