Systems and methods to reduce reductant consumption in exhaust aftertreatment systems

Gupta, Aniket; Cunningham, Michael J.

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Title: Systems and methods to reduce reductant consumption in exhaust aftertreatment systems

Abstract

Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust after treatment system that includes a first SCR device and a downstream second SCR device, a first reductant injector upstream of the first SCR device, and a second reductant injector between the first and second SCR devices. NO_x conversion occurs with reductant injection by the first reductant injector to the first SCR device in a first temperature range and with reductant injection by the second reductant injector to the second SCR device when the temperature of the first SCR device is above a reductant oxidation conversion threshold.

Inventors:: Gupta, Aniket; Cunningham, Michael J.

Issue Date:: 2018-10-30

Research Org.:: Cummins Inc., Columbus, IN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1492045

Patent Number(s):: 10113465

Application Number:: 15/389,625

Assignee:: Cummins Inc. (Columbus, IN)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D46/0027 - {with additional separating or treating functions}
B01D53/9418 - {for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas}
B01D53/9431 - {Processes characterised by a specific device}
B01D53/9486 - {for storing hydrocarbons}
B01D53/9495 - {Controlling the catalytic process}

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N13/009 - {having two or more separate purifying devices arranged in series}
F01N13/0093 - {the purifying devices are of the same type}
F01N2560/06 - the means being a temperature sensor
F01N2560/08 - the means being a pressure sensor
F01N2560/14 - having more than one sensor of one kind
F01N2610/02 - the substance being ammonia or urea
F01N2610/1453 - Sprayers or atomisers
F01N2610/146 - Control thereof, e.g. control of injectors or injection valves
F01N2900/0416 - using the state of a sensor, e.g. of an exhaust gas sensor
F01N2900/1602 - Temperature of exhaust gas apparatus
F01N2900/1621 - Catalyst conversion efficiency
F01N2900/1622 - Catalyst reducing agent absorption capacity or consumption amount
F01N3/02 - for cooling, or for removing solid constituents of, exhaust
F01N3/0205 - {using heat exchangers}
F01N3/023 - using means for regenerating the filters, e.g. by burning trapped particles
F01N3/035 - with catalytic reactors {, e.g. catalysed diesel particulate filters}
F01N3/0807 - {by using absorbents or adsorbents}
F01N3/0814 - {combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts}
F01N3/0821 - {combined with particulate filters
F01N3/0835 - {Hydrocarbons}
F01N3/0842 - {Nitrogen oxides}
F01N3/103 - {Oxidation catalysts for HC and CO only}
F01N3/208 - {Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
Y02T10/12 - Technologies for the improvement of indicated efficiency of a conventional ICE

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DOE Contract Number:: EE0004125

Resource Type:: Patent

Resource Relation:: Patent File Date: 2016 Dec 23

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Gupta, Aniket, and Cunningham, Michael J. Systems and methods to reduce reductant consumption in exhaust aftertreatment systems.  United States: N. p., 2018. 
        Web.

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                    Gupta, Aniket, & Cunningham, Michael J. Systems and methods to reduce reductant consumption in exhaust aftertreatment systems.  United States.

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                    Gupta, Aniket, and Cunningham, Michael J. Tue .  
        "Systems and methods to reduce reductant consumption in exhaust aftertreatment systems".  United States.  https://www.osti.gov/servlets/purl/1492045.

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@article{osti_1492045,

  title        = {Systems and methods to reduce reductant consumption in exhaust aftertreatment systems},

  author       = {Gupta, Aniket and Cunningham, Michael J.},

  abstractNote = {Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust after treatment system that includes a first SCR device and a downstream second SCR device, a first reductant injector upstream of the first SCR device, and a second reductant injector between the first and second SCR devices. NOx conversion occurs with reductant injection by the first reductant injector to the first SCR device in a first temperature range and with reductant injection by the second reductant injector to the second SCR device when the temperature of the first SCR device is above a reductant oxidation conversion threshold.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {10}

}

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Works referenced in this record:

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patent, October 2000

Patchett, Joseph A.
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Valveless dual leg exhaust aftertreatment system
patent, February 2008

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Similar Records

Title: Systems and methods to reduce reductant consumption in exhaust aftertreatment systems

Abstract

Citation Formats

Staged reductant injection for improved NO.sub.x reduction patent, October 2000

Method for converting exhaust gases from a diesel engine using nitrogen oxide absorbent patent, February 2001

Emission control system patent, February 2001

Emission control system patent, August 2001

Particulate control patent, April 2005

Diesel engine system comprising a soot filter and low temperature NOx trap patent, July 2005

Multistage reductant injection strategy for slipless, high efficiency selective catalytic reduction patent, February 2006

Integrated NOx and PM reduction devices for the treatment of emissions from internal combustion engines patent, June 2006

Exhaust system and methods of reducing contaminants in an exhaust stream patent, March 2007

Catalyzed SCR filter and emission treatment system patent, June 2007

Selective catalytic reduction patent, September 2007

Valveless dual leg exhaust aftertreatment system patent, February 2008

Plasma fuel converter NOx adsorber system for exhaust aftertreatment patent, May 2008

Multi-stage system for selective catalytic reduction patent, February 2009

Procedure for controlling the reducing agent in an exhaust gas post-processing system patent, November 2009

Catalyst system for the reduction of NOx and NH3 emissions patent, March 2010

LNT regeneration strategy over normal truck driving cycle patent, March 2010

Selective catalytic reduction system patent, October 2010

Catalyzed SCR filter and emission treatment system patent, March 2011

SCR on low thermal mass filter substrates patent, August 2011

System and method of NOx abatement patent, October 2011

NOx reduction device for diesel vehicles patent, April 2012

System and method for injecting ammonia into an exhaust gas stream patent, October 2013

Aftertreatment system having two SCR catalysts patent, April 2015

Staged reductant injection for improved NO.sub.x reduction
patent, October 2000

Method for converting exhaust gases from a diesel engine using nitrogen oxide absorbent
patent, February 2001

Emission control system
patent, February 2001

Emission control system
patent, August 2001

Particulate control
patent, April 2005

Diesel engine system comprising a soot filter and low temperature NOx trap
patent, July 2005

Multistage reductant injection strategy for slipless, high efficiency selective catalytic reduction
patent, February 2006

Integrated NOx and PM reduction devices for the treatment of emissions from internal combustion engines
patent, June 2006

Exhaust system and methods of reducing contaminants in an exhaust stream
patent, March 2007

Catalyzed SCR filter and emission treatment system
patent, June 2007

Selective catalytic reduction
patent, September 2007

Valveless dual leg exhaust aftertreatment system
patent, February 2008

Plasma fuel converter NOx adsorber system for exhaust aftertreatment
patent, May 2008

Multi-stage system for selective catalytic reduction
patent, February 2009

Procedure for controlling the reducing agent in an exhaust gas post-processing system
patent, November 2009

Catalyst system for the reduction of NOx and NH3 emissions
patent, March 2010

LNT regeneration strategy over normal truck driving cycle
patent, March 2010

Selective catalytic reduction system
patent, October 2010

Catalyzed SCR filter and emission treatment system
patent, March 2011

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patent, August 2011

System and method of NOx abatement
patent, October 2011

NOx reduction device for diesel vehicles
patent, April 2012

System and method for injecting ammonia into an exhaust gas stream
patent, October 2013

Aftertreatment system having two SCR catalysts
patent, April 2015