Cummins Emission Solutions Inc.

Fleetguard, Inc.

Cummins Filtration Ip, Inc.

Nelson Industries, Inc.

Cummins Inc.

3m Innovative Properties Company

Fleetgaurd, Inc.

Cummins Ip, Inc.

Z Gerald Liu

Niklas M Schmidt

Achuth Munnannur

Barry Mark Verdegan

Nathan A Ottinger

William C Haberkamp

Apoorv Kalyankar

Mihai Chiruta

Robert K Miller

Jeffrey S Morgan

Stephen L Fallon

Tadeusz Jaroszczyk

Changsheng C Su

Murray R Schukar

Kent Jeffrey Kallsen

Michael J Connor

Scott P Heckel

A Caner Demirdogen

James C Clerc

C Raymond Cheng

Matthew P Henrichsen

Thomas Edward Wood

Thomas M Yonushonis

Aleksey Yezerets

Neal W Currier

Randolph G Zoran

Krishna Kamasamudram

Jerald J Moy

Jason Alan Drost

Bryan Ellis Blackwell

Jon S Wake

Elaine M Yorkgitis

A Carl McDonald, Jr

David M Sarcona

Christopher E Holm

Brian W Schwandt

Wassem Abdalla

Andrew W Osburn

Jinqian Gong

Eric A Janikowski

Kelly R Schmitz

Arvind V Harinath

Kurt M A Badeau

Michael T Zuroski

Larry T Gunderson

Tamas Szailer

Yuanzhou Xi

Ramakrishna Gopal Dontha

M Yusuf Khan

Shirish Ambadas Shimpi

Roy W Detra

James Goss

Yujun Wang

Zhongshu Tan

Jason E Dorgan

Duncan Engeham

David Lee Dunnuck

Debbie Davidson

David Elsey

Paul Smith

Ken Capel

Andrew Critchley

Krishna Pradeep Chilumukuru

Matthew L Anderson

Jim F Burke

Cary D Bremigan

Kenneth J Kicinski

Roger D England

James Alan Debilzen

Kenneth Pawson

Rafael Ernesto Vasquez Lombardo

Thaddeus Alan Swor

Brad Henke

Robert W Nowicki

Michael J Welp

Joseph Charles Lincoln

Denise Christine Ford

Shashidhar Srinivas

Pradeep Prasad

Rebecca A Veele

Douglas K Benham

Achuth Mannannur

Piotr Uban

Abhishek Manekar

Varjavan Dastoor

Piotr Urban

Ken Pawson

Jim Clerc

William L Simonton

Douglas A Mitchell

Michael Welp

Robert Nowicki

Bryan E Blackwell

An exhaust gas aftertreatment system includes an introduction gas conduit, a dosing module, a mixer, and an outlet flange. The introduction conduit is centered on a conduit center axis. The dosing module is coupled to the introduction conduit and includes an injector. The injector is configured to provide a treatment fluid into the introduction conduit and is defined by an injection axis. The mixer is disposed within the introduction conduit and includes a mixer body. The mixer body is configured to receive exhaust gas and the treatment fluid. The outlet flange includes an outlet flange body, an outlet flange opening, and a plurality of outlet flange perforations. The outlet flange body is centered on an outlet flange center axis. The outlet flange body includes an outlet flange body inner portion and an outlet flange body outer portion. The outlet flange body inner portion is coupled to the mixer body.

Exhaust gas aftertreatment system

An aftertreatment system comprises: a housing, a SCR system disposed in the housing. A mixer is disposed upstream of the SCR system and includes: a hub, a tubular member disposed circumferentially around the hub and defining a reductant entry port, and plurality of vanes extending from the hub to the tubular member such that openings are defined between adjacent vanes. The plurality of vanes swirl the exhaust gas in a circumferential direction. A reductant injector is disposed on the housing upstream of the SCR system along a transverse axis and configured to insert a reductant into the exhaust gas flowing through the housing through the reductant entry port. The reductant is inserted at a non-zero angle with respect to the transverse axis opposite the circumferential direction to achieve virtual interception. A mixer central axis is radially offset with respect to a housing central axis of the housing.

Mixers for use in aftertreatment systems

A method includes: providing a SCR system comprising a SCR catalyst; heating the SCR system to a temperature greater than 500 degrees Celsius for a predetermined time so as to increase sulfur resistance of the SCR catalyst; and installing the SCR system in an aftertreatment system.

Treated SCR catalysts with enhanced sulfur resistance

A multi-stage mixer includes a multi-stage mixer inlet, a multi-stage mixer outlet, a first flow device, and a second flow device. The multi-stage mixer inlet is configured to receive exhaust gas. The multi-stage mixer outlet is configured to provide the exhaust gas to a catalyst. The first flow device is configured to receive the exhaust gas from the multi-stage mixer inlet and to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device. The first flow device includes a plurality of main vanes and a plurality of main vane apertures. The plurality of main vane apertures is interspaced between the plurality of main vanes. The plurality of main vane apertures is configured to receive the exhaust gas and to cooperate with the plurality of main vanes to provide the exhaust gas from the first flow device with a swirl flow.

Systems and methods for mixing exhaust gases and reductant in an aftertreatment system

Various example embodiments relate to a system that includes a nozzle. A dosing line is connected to the nozzle and a fuel dosing module. The fuel dosing module is in fluid communication with the dosing line and includes an outlet in fluid communication with the dosing line. An air inlet is positioned upstream of the outlet and is configured to receive air. A fuel inlet is positioned upstream of the outlet and is configured to receive fuel. A fuel valve is positioned upstream of the outlet and downstream of the fuel inlet and is configured to control the flow of fuel. The fuel dosing module is configured to combine the fuel and the air upstream of the outlet and downstream of the fuel valve to generate an air-fuel fluid, wherein the air-fuel fluid removes particles from the nozzle.

Diesel fuel dosing module for regeneration of diesel particulate filters with continuous purging

An exhaust gas aftertreatment system includes: a first sensor configured to measure a parameter in the exhaust gas aftertreatment system; a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and at least one controller configured to alternately receive sensor values from the first sensor for a first target period of time, and receive sensor values from the second sensor for a second target period of time.

Systems and methods for controlling exhaust gas aftertreatment sensor systems

An exhaust gas aftertreatment system includes: a first sensor configured to measure a parameter in the exhaust gas aftertreatment system; a second sensor configured to measure the parameter in the exhaust gas aftertreatment system, the second sensor disposed proximate the first sensor; and at least one controller configured to simultaneously receive sensor values from the first sensor and receive sensor values from the second sensor.

Apparatus and method for mixing reductant in an exhaust gas flow using virtual interception. Embodiments include an exhaust gas and reductant mixer comprising a body, a first flow device, and a reductant entry port. The body defines an exhaust gas flow path having a central portion. The first flow device swirls the exhaust gas in a circumferential direction with respect to the gas flow path. The reductant entry port introduces the reductant into the gas flow path at a location downstream from the first flow device and in an introduction direction (1) offset from the central portion, and (2) opposite the circumferential direction.

Exhaust gas and reductant mixer for an aftertreatment system

An exhaust aftertreatment system for increasing fractional efficiency of diesel or gasoline particulate filters includes a particulate filter that includes a housing and a filter substrate positioned in the housing. The filter substrate is pre-conditioned with an aqueous solution or suspension configured to decompose or evaporate in response to exposure to heat so as to precondition the filter substrate.

Method and apparatus to enhance fractional efficiency of diesel and gasoline particulate filters

A liquid reductant injector nozzle includes a first portion defining a hollow cylindrical static chamber, in fluid communication with second portion defining a hollow frustoconical converging section, which is in turn in fluid communication with a sharp edged type discharge orifice. The hollow cylindrical static chamber is in reductant receiving communication with a reductant source, and has a first and second circular opening having equal diameters. The second circular opening is downstream of the first circular opening. The hollow frustoconical converging section is in reductant receiving communication with the hollow cylindrical static chamber via the second circular opening. Reductant received from the reductant source is discharged through the discharge orifice. A sidewall of the hollow cylindrical static chamber and a frustum side of the frustoconical converging section define an angle of convergence of the liquid reductant injector nozzle relative to a plane of the second circular opening.

Converging liquid reductant injector nozzle in selective catalytic reduction systems

An aftertreatment system configured to reduce constituents of an exhaust gas produced by an engine comprises an aftertreatment component and an optical assembly. The optical assembly comprises an optical emitter configured to emit light onto a face of the aftertreatment component, and an optical detector configured to detect light reflected from the face of the aftertreatment component. A controller is configured to determine at least one of an amount of NOx gases or an amount of ammonia on the face of the aftertreatment component based on an optical parameter of the detected light that has reflected from the face of the aftertreatment component.

Optical sensing of NOand ammonia in aftertreatment systems

An exhaust gas aftertreatment system includes a first sensor configured to measure a parameter and a second sensor disposed proximate the first sensor and configured to measure the parameter. The system includes a controller configured to initially utilize the first sensor as a primary sensor. At target intervals, the controller is configured to receive a first sensor value from the first sensor and receive a second sensor value from the second sensor. The controller is configured to calculate a difference between the first sensor value and the second sensor value and determine if the difference between the first sensor value and the second sensor value is greater than a threshold value. If the difference between the first and second sensor values is greater than the threshold value, the controller is configured to stop utilizing the first sensor as the primary sensor and utilize the second sensor as the primary sensor.

A sensing assembly comprises a sensor housing having a sensing end and a coupling end opposite the sensing end. A sensing element and a heating element are disposed within the sensor housing. A tip cover and coupling end cover removably coupled to the ends of the sensor housing. The tip cover and coupling end cover are configured to be uncoupled from the sensor housing to enable removal of at least one of the sensing element, the heating element, or an integrated sensing/heating element from the sensor housing, and replacement with at least one of a new sensing element or a new heating element, the tip cover and coupling end cover configured to be recoupled to the sensor housing after at least one of the new sensing element or the new heating element is disposed in the sensor housing.

Remanufacturable sensing assemblies and methods of remanufacture

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Madison, WI, United States of America

Z Gerald Liu