Cummins Emission Solutions Inc.

Cummins Inc.

Bryon D Staebler

Jinqian Gong

Jeffrey Diwakar Abraham

Michael Haas

Krishna Kamasamudram

Edmund P Hodzen

Colin L Norris

Changsheng C Su

Hoseinali Borhan

James C Clerc

Adam W Kidd

Premjee Sasidharan

Thomas R Nelson

Farshad Farid

Shirish S Punde

Todd A Corbet

Bibin N Pattel

Gautam Sharma

Rayomand Dabhoiwala

Santosh Kumar Ratan

Rohan A Siddhanthi

Abhijeet Nande

David C Hall

Marc Alexander Greca

James Zokoe, Jr

Deepak Joy Frank

James Hyungsuk Kang

Bradley V Jones

Rohil Daya

Karthik Venkata Rama Krishna Dadi

Alain Ngoy Tschimwang

Santhosh Kumar Pettem

Dylan Lawrence Schneider

An aftertreatment system includes a particulate filter configured to receive exhaust gas from an engine and a controller that measures an actual pressure drop across the particulate filter, determines an expected total ash accumulation rate in the particulate filter based on a current duty cycle of the engine, determines an expected pressure drop across the particulate filter based on the expected total ash accumulation rate, compares the expected pressure drop with the actual pressure drop, and determines whether an oil consumption rate in the engine is abnormal based on the comparison.

Engine health and oil consumption rate diagnostic using back pressure

An aftertreatment system includes a selective catalytic reduction (SCR) system, a heater, and a controller that determines a rise in temperature of exhaust gas at an outlet of the heater for a plurality of power levels, predicts a first temperature of the exhaust gas at the outlet of the heater based on the rise in temperature, predicts a second temperature of the exhaust gas at a location of the SCR system based on the first temperature, compares the second temperature for each of the plurality of power levels with a target temperature of the exhaust gas at the inlet of the SCR system, selects one of the plurality of power levels based on the comparison, and adjusts operation of the heater based on the selected one of the plurality of power levels to achieve the target temperature of the exhaust gas at the inlet of the SCR system.

System and method for controlling temperature of exhaust gas at inlet of selective catalytic reduction system

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

A vehicle system () includes a conversion catalyst (), a temperature sensor (), an indication device (), and an exhaust gas aftertreatment system controller (). The conversion catalyst () is configured to receive exhaust gas. The temperature sensor () is configured to sense a conversion catalyst temperature of the conversion catalyst (). The indication device () is operable between a static state and an impure fuel alarm state. The exhaust gas aftertreatment system controller () is configured to receive the conversion catalyst temperature from the temperature sensor (). The exhaust gas aftertreatment system controller () is also configured to compare the conversion catalyst temperature to a conversion catalyst temperature lower threshold. The exhaust gas aftertreatment system controller () is also configured to compare the conversion catalyst temperature to a conversion catalyst temperature upper threshold.

Fuel analysis systems and methods

One exemplary embodiment is a method of operating a system comprising an internal combustion engine system, and an exhaust aftertreatment system comprising an SCR catalyst, and an electronic control system. The method comprises operating the electronic control system to perform the acts of determining a predicted temperature value indicative of a predicted future temperature of the SCR catalyst, determining a temperature profile value using the predicted temperature value and a current temperature value indicative of a current temperature of the SCR catalyst, operating a controller to provide an output indicating a difference between the temperature profile value and a temperature target, determining a heat request using the output of the controller, filtering the heat request using a prediction horizon, and controlling operation of the engine system using the filtered heat request to increase a temperature of the SCR catalyst.

Exhaust aftertreatment thermal management controls

An exhaust aftertreatment system configured to reduce nitrous oxide (NO) formation includes a first selective catalytic reduction (SCR) catalyst. The first SCR catalyst is configured for low NO formation and low ammonia (NH) storage capacity. A second SCR catalyst is positioned downstream of the first SCR catalyst. The second SCR catalyst is configured for high NHstorage capacity.

Advanced exhaust aftertreatment system architecture

Growing community of inventors

Columbus, IN, United States of America

Bryon D Staebler