Cummins Inc.

Cummins IP, Inc.

Other

Neal W Currier

Aleksey Yezerets

Krishna Kamasamudram

Ashok Kumar

Michael J Cunningham

Cary A Henry

Andrew W Osburn

Timothy R Frazier

Joan M Wills

Zheng Liu

Tamas Szailer

Michael A Smith

Morgan MacKenzie Andreae

J Stephen Wills

Mahesh Madurai Kumar

Yuetao Zhang

Z Gerald Liu

Michael Haas

Phanindra V Garimella

Hongbin Ma

Michael J Ruth

John N Chi

Sriram S Popuri

Abdul R Ofoli

Linsong Guo

Thomas M Yonushonis

Samuel C Geckler

Richard J Ancimer

Mert Geveci

Daniel D Wilhelm

Bradlee J Stroia

Xu Chen

Saurabh Yashwant Joshi

Junhui Li

Arvind Suresh

Di Wang

William Shelbourne Epling

Ryan Edgecomb

Yadan Tang

Robert Kern

Antonius Padua Nusawardhana

Roger Fox

Wayne Goodman

Cheryl Klepser

Lk Hwang

Leon A LaPointe

Lyle E Kocher

Daniel J Mohr

Paul James Millington

J Steve Wills

Jinyong Luo

Krishna Pradeep Chilumukuru

Ross C Berryhill

David S Lafyatis

Edward J Lyford-Pike

Weiwen Wang

Lisa Farrell

Ashish Shankar Gupta

Yujun Wang

Joe V Hill

Rafael Ernesto Vasquez Lombardo

Anand Srinivasan

Tyler A Rash

Andy Osburn

Pradeep Prasad

Stewart D Sullivan

S Arvind Suresh

Ben Wang

Carl Justin Kamp

Leigh Anne Rogoski

Waratt Rattasiri

Mathew L Allen

Bradlee J Strolia

James J Fier

Ashish Gupta

A system includes 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 ratio of NO to NOat or proximate an inlet of the SCR catalyst. The controller is further structured to command the at least one reductant dosing system to increase, decrease, or maintain an amount of reductant provided to the exhaust gas based on comparing the ratio of NO to NOto a previous NO to NOratio.

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

A computer system is structured to determine a density of particulate matter in a diesel particulate filter (DPF) sample. The computer system includes a processing circuit having a processor and a memory. The processing circuit is structured to generate a computed tomography (CT) scan-based image of the DPF sample; and, segment the CT scan-based image of the DPF sample into a plurality of regions. For at least one region from the plurality of regions, the processing circuit is structured to determine a density of a portion of the DPF sample corresponding to the at least one region of the CT scan-based image of the DPF sample and cause an electronic display of a user device to display the CT scan-based image including the at least one region and an indication of the density for the at least one region.

Systems and methods for evaluating part density, contamination and defects using computed tomography scanning

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 NOat 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 NOin the exhaust gas.

A diagnostic system () is provided and includes a sensor () disposed downstream from an exhaust gas aftertreatment system. Also included in the diagnostic system () is a central diagnostic unit () configured to diagnose a condensation condition associated with the sensor () for mitigating a sensor failure due to water condensation on the sensor (), the central diagnostic unit () performing the diagnosis on the condensation condition based on water storage and release information related to a component of the exhaust gas aftertreatment system. The sensor () is activated based on the water storage and release information.

System and method to mitigate sensor failures due to water condensation

A method of recovering selective catalytic reduction catalysts relates to metal-Zeolite based catalysts. A selective catalytic reduction catalyst service event where a metal-Zeolite based selective catalytic reduction catalyst of an exhaust aftertreatment system may perform below a threshold level of performance is determined. The selective catalytic reduction catalyst then exposed to a recovery fluid selected to facilitate movement of metal ions.

Recovering deactivated metal/zeolite catalysts

System and methods for reducing secondary emissions in an exhaust stream from an internal combustion engine are disclosed. The systems and methods include a filtration device positioned downstream from an SCR catalyst of an aftertreatment system disposed in the exhaust system. The filtration device can also be used for particulate filter diagnostics and for treatment of ammonia slip.

Systems and methods for reducing secondary emissions from catalyst components

A system includes an internal combustion engine producing exhaust gases as a byproduct of operation and an aftertreatment system that treats the exhaust gases. The system further includes a controller that is structured to functionally execute operations to enhance the temperature of the aftertreatment system. The controller includes an operating condition monitoring module that interprets a temperature value at a position upstream of a catalyst positioned in the aftertreatment system. The controller further includes an operating condition management module that interprets a threshold temperature value, and an engine management module that provides an engine operation command to continue engine operation in response to the temperature value being at least equal to the threshold temperature value.

Hybrid engine aftertreatment thermal management strategy

There is disclosed method and systems for charging a depleted or spent solid storage media with gaseous ammonia.

Solid storage media charging with ammonia for use in selective catalytic reduction

System, apparatus, and methods are disclosed for treating a reduction catalyst that has been exposed to an amount of sulfur. The treating of the reduction catalyst includes providing a fluid stream at a position upstream of the reduction catalyst. The fluid stream includes a temperature and a reductant amount, and the reductant amount includes an amount of urea, ammonia, or hydrocarbons.

System, method, and apparatus for sulfur recovery on an SCR catalyst

Systems, methods, and apparatuses are provided for determining an SCR component sulfur value, determining whether the SCR component sulfur value exceeds a sulfur regeneration threshold and increasing an engine NO amount incident to an SCR catalyst in response to the SCR component sulfur value exceeding the sulfur regeneration threshold.

System, method, and apparatus for improved desulfurization of aftertreatment components

Systems, apparatus and methods are disclosed for reducing the amount of nitrous oxide (NO) produced in a selective catalytic reductant (SCR) catalyst in an exhaust aftertreatment system. The SCR catalysts are arranged to reduce the amount of NO produced during NOreduction while not adversely affecting NOconversion.

[object Object]

Described herein is a selective catalytic reduction (SCR) catalyst treatment system that includes a vanadium-based SCR catalyst contaminated with a water-soluble contaminant. The SCR catalyst treatment system also includes a water delivery system that is configured to apply water to the vanadium-based SCR catalyst to remove the water-soluble contaminant from the vanadium-based SCR catalyst.

Diagnosis and treatment of selective catalytic reduction catalyst

An internal combustion engine system includes a spark-ignited internal combustion engine powered by a gaseous fuel. The engine system also includes an air intake in air providing communication with the internal combustion engine. Further, the engine system includes an exhaust system in exhaust gas receiving communication with the internal combustion engine. The exhaust system includes a methane oxidation catalyst through which at least a portion of the exhaust gas flows and an exhaust gas recirculation line in exhaust gas providing communication with the air intake.

Exhaust system for spark-ignited gaseous fuel internal combustion engine

Systems, methods and apparatus are disclosed for targeted regeneration of a catalyst device in an exhaust aftertreatment system of an internal combustion engine. The targeted regeneration can include interpreting, initiating, and/or completing a regeneration event for an SCR catalyst or other type of catalyst in response to a catalyst deactivation condition. A catalyst regeneration event includes at least one of exposing the catalyst to a sufficiently high temperature over a time period that removes contaminants from the catalyst and manipulation of the exhaust gas composition to initiate and/or accelerate removal of contaminants from the catalyst.

Targeted regeneration of a catalyst in an aftertreatment system

Growing community of inventors

Columbus, IN, United States of America

Neal W Currier