Southwest Research Institute

Cummins Inc.

Cummins Emission Solutions Inc.

Cummins Ip, Inc.

Cary A Henry

Michael J Ruth

Aleksey Yezerets

Neal W Currier

Robert Henderson

Scott T Eakle

Ryan Christian Hartley

Krishna Kamasamudram

Hongbin Ma

Cynthia Chaffin Webb

Steven J Kolhouse

Tamas Szailer

Xu Chen

Junhui Li

Roger Fox

Jess Witman Gingrich

Charles Edward Roberts, Jr

Michael J Cunningham

Andrew W Osburn

Terrence Francis Alger, Ii

Graham Thomas Conway

Thomas Z Moore

Phillip Anthony Weber

Matt Reeves

Nicholas Kaylor

Grant Seuser

Nolan Wright

Bryan Zavala

This invention relates to exhaust replication systems and methods, such as systems for testing automotive exhaust aftertreatment devices. More particularly, methods for steady state and transient generation and flow of NOand/or NO from a fluid such as nitric acid for introduction into the burner-based exhaust replication system.

Method and apparatus for steady state and transient generation of NOand no for use with burner-based exhaust replication systems

A method, apparatus and/or system for measuring engine oil consumption using laser induced breakdown spectroscopy.

Method and apparatus for measuring engine oil consumption using laser induced breakdown spectroscopy

A method of using a burner-based exhaust replication system to generate exhaust that contains nitrogen dioxide (NO). An example of such as system is a system used to test automotive exhaust aftertreatment devices. A fluid that decomposes to generate NOas one of its decomposition products is selected. The fluid is heated thereby generating NO, with the amount and duration of heating is controlled to result in a desired decomposition extent of NOfrom the fluid. The fluid is then delivered to an exhaust stream of the system.

Generation of nitrogen dioxide for use with burner-based exhaust replication system

An improved SCRoF (selective catalytic reduction on filter) device for treating exhaust from an internal combustion engine. The filter has numerous entry and exit channels. Exhaust enters the entry channels and flows through side walls into the exit channels. Relative to the exhaust flow path, these side walls are coated on the downstream side with a ceria-based catalyst and on the upstream side with a Cu-zeolite catalyst. This allows the filter to optimally achieve both particulate matter oxidation and NOx reduction, respectively.

Enhanced soot oxidation on particulate filter using ceria-based catalyst and zone coating strategy

A burner-based exhaust replication system that includes mechanisms for rapidly exchanging exhaust aftertreatment devices for testing. The exhaust replication system has a test leg for delivering exhaust to an exhaust aftertreatment device and a bypass leg for bypassing exhaust around the test leg. The test leg is equipped with a rotating drum that holds a number of exhaust aftertreatment devices. The drum is rotatable to selectively align the aftertreatment devices with the test leg and is moveable laterally in a direction parallel to the test leg to aid in sealing the test leg to the aftertreatment device.

Burner-based exhaust replication system with rapid exchange of exhaust aftertreatment devices

Technologies for producing an exhaust gas stream with controlled hydrocarbon species are disclosed. In some embodiments the technologies include an apparatus for producing an exhaust gas stream. The apparatus may include a burner for combusting primary fuel and produce an exhaust gas stream, and an exhaust pipe coupled to the burner to receive the exhaust gas stream. One or more supplemental fuel inlets may be coupled to the exhaust gas pipe for the addition of supplemental fuel to the exhaust gas stream. In embodiments, the speciation and total concentration of hydrocarbon compounds in the exhaust gas stream may be adjusted by controlling the relative amount of supplemental fuel added to the exhaust gas stream. Methods for producing an exhaust gas stream are also disclosed.

Technologies for producing exhaust gas with controlled hydrocarbon speciation

A method of providing electrical power to on-board electrical devices of a vehicle. The engine has an EGR (exhaust gas recirculation loop) which may be a high pressure loop, a low pressure loop, or a dedicated cylinder loop. A catalyzed heat exchanger on the EGR loop has a steam reformation catalyst and a heat exchanger. The heat exchanger uses hot exhaust gas from the main exhaust line to heat the catalyst. A methane fuel source adds methane to the recirculated exhaust stream before it enters the catalyst, and the catalytic reaction increases the amount of hydrogen in the recirculated exhaust. The hydrogen is then delivered to a PEM fuel cell.

Internal combustion engine having catalyzed heat exchanger for steam reformation and delivery of hydrogen to a fuel cell

The present invention is directed at stabilization of aqueous urea solutions containing organometallic catalyst precursors. Stabilization can be achieved by monitoring and controlling the solution pH.

Stabilization of aqueous urea solutions containing organometallic catalyst precursors

The systems and methods described herein beneficially provide an exit gas having a third, relatively low, NO/NOratio that closely approximates the NO/NOratio found in the exhaust of various internal combustion engines. The systems and methods described herein receive a feed gas having a first, relatively high NO/NOratio. The feed gas is apportioned into a first feed gas portion that is passed through a non-thermal plasma generation system to provide an intermediate gas having a second, relatively very low, NO/NOratio and a second feed gas portion having the first NO/NOratio. The intermediate gas and the second feed gas portion are combined to provide the exist gas having the third, relatively low, NO/NOratio. The systems and methods described herein beneficially provide an exit gas having a variable NO/NOratio to simulate exhaust from a variety of internal combustion engines.

NO/NOratio adjustment using non-thermal plasma

The present disclosure is directed at a dosing method and apparatus for treatment of reductant urea solutions with water soluble organometallic catalyst precursors which convert to active catalyst compounds in diesel exhaust gas systems. The active catalysts then promote hydrolysis of isocyanic acid into ammonia and/or decomposition of relatively high molecular weight deposits which deposits may otherwise reduce selective catalytic reduction efficiency.

Dosing method and apparatus for reductant urea solutions with catalyst precursors to assist selective catalytic reduction

A method to process exhaust gas expelled from at least one cylinder of a plurality of cylinders of an internal combustion engine, the method comprising providing an internal combustion engine, wherein the engine comprises a steam hydrocarbon reformer including a steam reformation catalyst, treating exhaust gas of the engine containing hydrocarbon and water by reacting the hydrocarbon and water in the presence of the steam reformation catalyst in the steam hydrocarbon reformer to provide treated exhaust gas. The treated exhaust gas includes carbon monoxide gas and hydrogen gas produced from the reaction, and mixing the treated exhaust gas, including the carbon monoxide gas and hydrogen gas produced in the steam hydrocarbon reformer with air to provide the mixture of air and treated exhaust gas introduced into the cylinders of the engine.

Apparatus and methods for exhaust gas recirculation for an internal combustion engine powered by a hydrocarbon fuel

A method of providing internal EGR to an engine having at least one dedicated EGR cylinder. The main (non dedicated) cylinders are operated with internal EGR, in addition to external EGR from the dedicated EGR cylinder. The dedicated EGR cylinder has separate valve control so that it need not be operated with internal EGR, thereby allowing it to be operated at a richer air-to-fuel ratio.

Method of operating internal combustion engine having increased rich limit for dedicated EGR cylinder

A method of detecting urea-derived deposits in the exhaust line of an internal combustion engine having an SCR (selective catalyst reduction) aftertreatment system. A radio frequency (RF) transmitter is placed upstream of the SCR system's urea injector, and an RF receiver is placed downstream of the mixer. The transmitter and receiver are used to acquire baseline RF data representing a clean condition exhaust line without deposits. During subsequent operation of the engine, the transmitter and receiver are used to acquire subsequent RF data, which is compared to the baseline data after being corrected for temperature differences. If the comparison indicates the presence of one or more deposits, an alert signal is generated.

Urea deposit detection for use with SCR emissions control system

A method of operating an internal combustion engine having a plurality of cylinders, the method comprising: operating the engine with at least one of the cylinders of the engine as a dedicated exhaust gas recirculation (EGR) cylinder; mixing exhaust gas expelled from the dedicate EGR cylinder with air in an intake system to provide a mixture of exhaust gas and air; providing a first hydrocarbon fuel and a second hydrocarbon fuel; introducing a charge comprising the first hydrocarbon fuel, the second hydrocarbon fuel and the mixture of exhaust gas and air to the dedicated EGR cylinder; igniting the charge in the dedicated EGR cylinder; expelling exhaust gas from the dedicated EGR cylinder; and recirculating the exhaust gas to the intake system of the engine.

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Helotes, TX, United States of America

Cary A Henry