Cummins Emission Solutions Inc.

Cummins Filtration Ip, Inc.

Todd A Corbet

Jinqian Gong

Yinghuan Lei

Marc Alexander Greca

Vijay Ramchandra Kadam

Ryan M Johnson

Andrew W Osburn

Colin L Norris

Daniel D Wilhelm

James C Clerc

Daniel R Harshbarger

Premjee Sasidharan

Ross C Berryhill

Joseph M Brault

Vikram Sundararajan

Sergio Manuel Hernandez-Gonzalez

Bryon D Staebler

Lindsey R Henry

Santosh Kumar Ratan

Kerang Wang

Robert Edward Cochran

Baseer Faalzada

Uma Vajapeyazula

David C Hall

Kyle Robert Fath

Bradley V Jones

Weichao Wang

Rohil Daya

Karthik Venkata Rama Krishna Dadi

Alain Ngoy Tschimwang

A system and method include determining, by a controller associated with an aftertreatment system, satisfaction of an enabling condition and in response to the satisfaction of the enabling condition pausing, by the controller, hydrocarbon dosing in a regeneration cycle of the aftertreatment system. The system and method also include upon pausing of the hydrocarbon dosing, monitoring, by the controller, an oxidation catalyst of the aftertreatment system for a light-off shift condition.

System and method for mitigating high sulfur fuel impact for DOC/DPF system

A controller for controlling regeneration in an aftertreatment system comprising a first leg and a second leg is configured to: determine whether regeneration is permitted by the engine based on engine operating parameters; in response to regeneration being permitted, determine whether regeneration is required in at least one of the first leg or the second leg based on operating parameters of the first leg and the second leg, and whether regeneration is inhibited in either the first leg or the second leg; and in response to determining that (i) regeneration is required in at least one of the first or second leg, and (ii) regeneration is not inhibited in either the first or the second leg, cause insertion of hydrocarbons into the engine to thereby increase the temperature of the exhaust gas to a target temperature and cause regeneration in each of the first and second leg.

Systems and methods for controlling regeneration of aftertreatment systems including multiple legs

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 system for treating constituents of an exhaust gas produced by an engine includes a heater configured to selectively heat the exhaust gas entering the aftertreatment system. An aftertreatment component is disposed downstream of the heater. A gas sensor is disposed downstream of the heater and upstream of the aftertreatment component. The gas sensor comprises a sensing element, and a heating element configured to selectively heat the sensing element to an operating temperature of the sensing element.

Aftertreatment system with gas sensor downstream of a heater

Systems, methods, and apparatuses for adaptive regeneration of aftertreatment system components. The system may include an aftertreatment system and a controller. The controller is configured to access one or more parameters indicative of an ambient condition, determine a regeneration type of a regeneration process for a component of the aftertreatment system, determine an application in condition, and modify a parameter for the regeneration process for the component of the aftertreatment system. In some instances, the controller initiates the regeneration process. In some instances, the one or more parameters include an ambient air temperature, a reductant tank temperature, or a particulate matter sensor temperature. In some instances, the modified parameter includes a target regeneration temperature, a regeneration duration, a dwell time between regeneration process, a threshold value for the regeneration process, or a minimum regeneration temperature.

System for adaptive regeneration of aftertreatment system components

A sensor diagnostic method, such as to determine rationality of one of three temperature sensors used in an exhaust aftertreatment system, includes determining the temperature difference between the first and second sensor, determining the temperature difference between the second and third sensor, determining whether the temperature differences are within an acceptable threshold range and comparing the two temperature differences to determine which sensor is in error, if any.

Sensor rationality diagnostic

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Franklin, IN, United States of America

Todd A Corbet