Cummins Emission Solutions Inc.

Cummins Ip, Inc.

Cummins Inc.

Douglas Mitchell

Mihai Chiruta

Ryan M Johnson

Jason Alan Drost

Joseph M Brault

Lindsey R Henry

Andrew W Osburn

John G Buechler

Jim L Alonzo

Tamas Szailer

A Carl McDonald, Jr

Jim F Burke

James Goss

Alonzo Scott Cole

Newton Crenshaw

Daniel D Wilhelm

Achuth Munnannur

Xiao Lin

Mark N Bays

Mahendra Mittapalli

Vinay Kumar Joshi

Kartiki Jagtap

George Eugene Mavroudis

Lisa Farrell

Ian A Package

Randy G Zoran

Lauren A Lynch

Upendra Deshmukh

Kwadwo O Owusu

April Evans

Robert Kern

Various embodiments relate to a selective catalytic reduction system for treating exhaust gases of an internal combustion engine. The system includes an inlet section that receives exhaust gases from the engine. The system includes a tank storing diesel exhaust fluid ('DEF'), a pump, a valve, and an injector each in fluid communication with each other. The injector is coupled to the inlet exhaust pipe and configured to inject DEF into the exhaust gases flowing through the inlet exhaust pipe in a plurality of pulses. Each of the plurality of pulses injects a constant volume of DEF into the inlet exhaust pipe. The system further includes a controller configured to operate the pump and the valve such that a time interval between successive constant volume pulses of the plurality of pulses is varied based on a variable oxides of nitrogen content of the exhaust gases.

Integrative reductant system and method using constant volume injection

An exemplary exhaust test tog apparatus includes a housing defining an exhaust flow path extending from an inlet to an outlet. At least a portion of the housing is selectably rotatable relative to an exhaust aftertreatment system. An arm extends from the housing into the exhaust flow path. An exhaust probe configured to measure an exhaust constituent is coupled with the arm and positioned at a location in the exhaust flow path. An actuator is configured to extend and retract the arm to vary the location of the exhaust probe in the exhaust flow path. The exhaust probe is moveable to a plurality of locations within the exhaust flow path through a combination of rotation of the housing and extension and retraction of the arm.

Uniformity index performance evaluation in an SCR aftertreatment system

An aftertreatment system includes a filter configured to receive an exhaust gas and a selective catalytic reduction (SCR) system configured to treat the exhaust gas. A body mixer is disposed downstream of the filter and upstream of the SCR system. The body mixer includes a housing defining an internal volume and including at least a first passageway, a second passageway, and a third passageway. The first passageway receives a flow of the exhaust gas from the filter and directs the flow of the exhaust gas towards the second passageway. The second passageway redirects the flow in a second direction opposite the first direction towards the third passageway. The third passageway redirects the flow in a third direction opposite the second direction towards the SCR system. An injection port is disposed on a sidewall of the housing and configured to communicate an exhaust reductant into the internal volume.

Diesel exhaust fluid mixing body using variable cross-section switchback arrangement

An exemplary exhaust testing apparatus includes a housing defining an exhaust flow path extending from an inlet to an outlet. At least a portion of the housing is selectably rotatable relative to an exhaust aftertreatment system. An arm extends from the housing into the exhaust flow path. An exhaust probe configured to measure an exhaust constituent is coupled with the arm and positioned at a location in the exhaust flow path. An actuator is configured to extend and retract the arm to vary the location of the exhaust probe in the exhaust flow path. The exhaust probe is moveable to a plurality of locations within the exhaust flow path through a combination of rotation of the housing and extension and retraction of the arm.

Uniformity index performance evaluation in an SCR aftertreatement system

Exhaust aftertreatment assemblies and methods of manufacturing and operating exhaust aftertreatment assemblies. The exhaust aftertreatment assembly includes a reductant delivery device, a reductant source fluidly coupled to the reductant delivery device, a mixing chamber positioned between the reductant delivery device and the reductant source and thereby fluidly coupling the reductant source to the reductant delivery device, and a compressed air source fluidly coupled to the mixing chamber upstream of the mixing chamber with respect to the reductant delivery device. The compressed air source provides compressed air to mix with reductant in the mixing chamber.

Constant mass flow injection system

One form of the present application is an apparatus including an internal combustion engine structured to produce an exhaust flow, an exhaust system structured to receive the exhaust flow, and a reductant injector structured to inject reductant into a primary passage of the exhaust system upstream of a catalyst. The apparatus further includes an injector passage structured to receive a portion of exhaust upstream of the injector and further structured to flow the exhaust into the primary passage around the injector in a manner such that deposit formation is reduced.

Diesel exhaust fluid deposit mitigation

An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system that delivers reductant to an exhaust stream in an exhaust aftertreatment system. A temperature sensor may be positioned in or near the flow of reductant and exhaust to measure the temperature of the reductant and exhaust. A change in temperature over time, such as an increase, decrease, or change in variation amplitude, may indicate the presence of a reductant deposit in the system. Detection of the deposit may initiate a regeneration cycle in which the operating characteristics of the system change to eliminate the reductant deposit to prevent it from hindering the performance of the exhaust aftertreatment system.

Apparatus, method, and system for diagnosing reductant deposits in an exhaust aftertreatment system

An exhaust assisted pipe assembly including an outer portion having an opening for receiving dosed reductant from a dosing module and an inner portion disposed within the outer portion. The inner portion defines a main flow path for receiving a first portion of a fluid from an upstream source, and the inner portion and the outer portion cooperatively define a first flow path and a second flow path. The first flow path is configured to direct a second portion of the fluid from the upstream source past the opening for receiving dosed reductant and into the main flow path to increase momentum of the dosed reductant into the main flow path. The second flow path is configured to direct a third portion of the fluid from the upstream source toward the dosed reductant to decrease the momentum of the dosed reductant in the main flow path.

In-line decomposition reactor pipe with exhaust assist

A system for species concentration spatial reconstruction for an exhaust system includes an emitter, a detector, and a controller. The emitter is coupled to a first portion of the exhaust system and tuned to a specific wavelength of a species to be measured. The detector is coupled to a second portion of the exhaust system opposite to the first portion such that the detector is positioned to detect a beam attenuation of a beam from the emitter. The controller is configured to receive a plurality of beam attenuation measurements from the detector and to generate a cross-sectional species concentration map based on the plurality of beam attenuation measurements.

Species spatial reconstruction for exhaust system using spectroscopy and tomography

Systems and devices for delivering a fluid to an exhaust system. An inlet is configured for receiving the fluid, and a conduit includes openings for expelling the fluid into the exhaust system. A compact gaseous delivery system may include a first conduit in fluid communication with a fluid source, a second conduit in fluid communication with the first conduit, and a plurality of additional conduits in fluid communication with the second conduit and including a plurality of openings for expelling the fluid into the exhaust system. The first conduit, second conduit, and plurality of additional conduits may have axes that are substantially coplanar to form the compact gaseous delivery system that may be disposed within the exhaust system. Implementations may include openings with varying diameters. Other implementations may include a volute conduit with openings.

Gaseous reductant delivery devices and systems

Various embodiments provide for apparatuses and systems involving a reactor pipe configured to receive reductant from an injector into a flow of exhaust exiting an engine. The reactor pipe comprises an inlet portion, a plurality of louvers, an outlet portion, and a radial loop. The inlet portion is structured to receive the flow exiting the engine into the reactor pipe. The louvers are structured to alter a direction of the flow. Further, the radial loop is configured to extend between the inlet portion and the outlet portion and receives the flow of exhaust through the inlet portion. The radial loop also directs the flow of the exhaust toward the outlet portion and reduces the velocity of the flow of the exhaust such that the reductant has an increased amount of time to react with the exhaust.

Compact radial exterior exhaust assisted decomposition reactor pipe

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Indianapolis, IN, United States of America

Douglas Mitchell