Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature

Title: Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature

Abstract

An aftertreatment system includes a first oxidation catalyst, a second oxidation catalyst, and a turbocharger. The first oxidation catalyst is upstream of the turbocharger and includes a first oxidation catalyst formulation. The second oxidation catalyst is downstream of the turbocharger and includes a second oxidation catalyst formulation different than the first oxidation catalyst formulation. The second oxidation catalyst formulation is configured to promote conversion of nitric oxide (NO) to nitrogen dioxide (NO ₂).

Inventors:: Zha, Yuhui; Heichelbech, John K.; Cunningham, Michael J.

Issue Date:: 2018-07-17

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1467418

Patent Number(s):: 10,022,667

Application Number:: 15/663,457

Assignee:: Cummins Inc. (Columbus, IN)

DOE Contract Number:: EE0006795

Resource Type:: Patent

Resource Relation:: Patent File Date: 2017 Jul 28

Country of Publication:: United States

Language:: English

Citation Formats


                    Zha, Yuhui, Heichelbech, John K., and Cunningham, Michael J. Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature.  United States: N. p., 2018. 
        Web.

Copy to clipboard


                    Zha, Yuhui, Heichelbech, John K., & Cunningham, Michael J. Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature.  United States.

Copy to clipboard


                    Zha, Yuhui, Heichelbech, John K., and Cunningham, Michael J. Tue .  
        "Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature".  United States.  https://www.osti.gov/servlets/purl/1467418.

Copy to clipboard


                    
@article{osti_1467418,

  title        = {Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature},

  author       = {Zha, Yuhui and Heichelbech, John K. and Cunningham, Michael J.},

  abstractNote = {An aftertreatment system includes a first oxidation catalyst, a second oxidation catalyst, and a turbocharger. The first oxidation catalyst is upstream of the turbocharger and includes a first oxidation catalyst formulation. The second oxidation catalyst is downstream of the turbocharger and includes a second oxidation catalyst formulation different than the first oxidation catalyst formulation. The second oxidation catalyst formulation is configured to promote conversion of nitric oxide (NO) to nitrogen dioxide (NO2).},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {7}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Methods and systems for emission system control
patent, January 2012

Hepburn, Jeffrey; Ruona, William; Fulton, Brien
US Patent Document 8,096,125
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8096125

EGR extraction immediately downstream pre-turbo catalyst
patent, August 2012

Styles, Daniel; Oberski, Christopher; Cowland, Christopher
US Patent Document 8,250,866
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8250866

Exhaust purification device and exhaust purification method for diesel engine
patent, January 2014

Osumi, Kazuo
US Patent Document 8,636,970
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8636970

Nitrogen dioxide generation diagnostic for a diesel after-treatment system
patent, March 2015

Anilovich, Igor; Coppola, John; Kowalkowski, Janean
US Patent Document 8,984,867
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F8984867

Pre-turbocharger catalyst
patent, April 2015

Murphy, Patrick
US Patent Document 9,003,781
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F9003781

Similar records in DOE Patents and OSTI.GOV collections:

Dedicated exhaust gas recirculation control systems and methods

Patent Sczomak, David P.; Narayanaswamy, Kushal; Keating, Edward J.

An engine control system of a vehicle includes a fuel control module that controls fuel injection of a first cylinder of an engine based on a first target air/fuel ratio that is fuel lean relative to a stoichiometric air/fuel ratio and that controls fuel injection of a second cylinder of the engine based on a second target air/fuel ratio that is fuel rich relative to stoichiometry. The first cylinder outputs exhaust to a first three way catalyst (TWC), and the second cylinder outputs exhaust to an exhaust gas recirculation (EGR) valve. An EGR control module controls opening of the EGRmore »« less
Full Text Available
Catalysts, systems and methods to reduce NOX in an exhaust gas stream

Patent Castellano, Christopher R [Ringoes, NJ]; Moini, Ahmad [Princeton, NJ]; Koermer, Gerald S [Basking Ridge, NJ]; ...

Catalysts, systems and methods are described to reduce NO.sub.x emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having an SCR catalyst comprising silver tungstate on an alumina support. The emissions treatment system may be used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines. An emissions treatment system may further comprise an injection device operative to dispense a hydrocarbon reducing agent upstream of the catalyst.
Full Text Available
Optical sensing elements for nitrogen dioxide (NO.sub.2) gas detection, a sol-gel method for making the sensing elements and fiber optic sensors incorporating nitrogen dioxide gas optical sensing elements

Patent Mechery, Shelly John [Mississippi State, MS]; Singh, Jagdish P [Starkville, MS]

A sensing element, a method of making a sensing element, and a fiber optic sensor incorporating the sensing element are described. The sensor can be used for the quantitative detection of NO.sub.2 in a mixture of gases. The sensing element can be made by incorporating a diazotizing reagent which reacts with nitrous ions to produce a diazo compound and a coupling reagent which couples with the diazo compound to produce an azo dye into a sol and allowing the sol to form an optically transparent gel. The sensing element changes color in the presence of NO.sub.2 gas. The temporal responsemore »« less
Full Text Available
Systems and methods for reducing current and increasing voltage in thermoelectric systems

Patent LaGrandeur, John; Poliquin, Eric; Kossakovski, Dmitri; ...

A thermoelectric assembly and method are provided. The thermoelectric assembly can extend at least partially around a perimeter of a first fluid conduit. The thermoelectric assembly can include a plurality of thermoelectric sub-assemblies aligned with one another along the perimeter of the first fluid conduit. Each thermoelectric sub-assembly can include a plurality of thermoelectric elements in parallel electrical communication with one another, and at least one shunt a plurality of electrically insulating elements to prevent current flow in a plane perpendicular to the first direction between adjacent thermoelectric sub-assemblies.
Full Text Available
Systems and methods to reduce reductant consumption in exhaust aftertreament systems

Patent Gupta, Aniket; Cunningham, Michael J.

Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust aftertreatment 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.
Full Text Available

Similar Records

Title: Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature

Abstract

Citation Formats

Methods and systems for emission system control patent, January 2012

EGR extraction immediately downstream pre-turbo catalyst patent, August 2012

Exhaust purification device and exhaust purification method for diesel engine patent, January 2014

Nitrogen dioxide generation diagnostic for a diesel after-treatment system patent, March 2015

Pre-turbocharger catalyst patent, April 2015

Methods and systems for emission system control
patent, January 2012

EGR extraction immediately downstream pre-turbo catalyst
patent, August 2012

Exhaust purification device and exhaust purification method for diesel engine
patent, January 2014

Nitrogen dioxide generation diagnostic for a diesel after-treatment system
patent, March 2015

Pre-turbocharger catalyst
patent, April 2015