Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device

Schmieg, Steven J; Viola, Michael B; Cheng, Shi-Wai S; Mulawa, Patricia A; Hilden, David L; Sloane, Thompson M; Lee, Jong H

Title: Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device

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Abstract

A method for monitoring a hydrocarbon-selective catalytic reactor device of an exhaust aftertreatment system of an internal combustion engine operating lean of stoichiometry includes injecting a reductant into an exhaust gas feedstream upstream of the hydrocarbon-selective catalytic reactor device at a predetermined mass flowrate of the reductant, and determining a space velocity associated with a predetermined forward portion of the hydrocarbon-selective catalytic reactor device. When the space velocity exceeds a predetermined threshold space velocity, a temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is determined, and a threshold temperature as a function of the space velocity and the mass flowrate of the reductant is determined. If the temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is below the threshold temperature, operation of the engine is controlled to regenerate the hydrocarbon-selective catalytic reactor device.

Inventors:: Schmieg, Steven J; Viola, Michael B; Cheng, Shi-Wai S; Mulawa, Patricia A; Hilden, David L; Sloane, Thompson M; Lee, Jong H

Issue Date:: 2014-05-06

Research Org.:: GM Global Technology Operations LLC, Detroit, MI (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1130964

Patent Number(s):: 8713914

Application Number:: 12/568,754

Assignee:: GM Global Technology Operations LLC (Detroit, MI)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

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F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N3/106 - {Auxiliary oxidation catalysts}
F01N2560/14 - having more than one sensor of one kind
F01N2610/03 - the substance being hydrocarbons, e.g. engine fuel

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

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N2560/026 - for measuring or detecting NOx
F01N3/035 - with catalytic reactors {, e.g. catalysed diesel particulate filters}

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F02D41/405 - {with post injections}

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N2900/1411 - Exhaust gas flow rate, e.g. mass flow rate or volumetric flow rate
F01N2560/06 - the means being a temperature sensor
F01N13/0097 - {the purifying devices are arranged in a single housing}

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F02D41/025 - {by changing the composition of the exhaust gas, e.g. for exothermic reaction on exhaust gas treating apparatus}

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N3/208 - {Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent}
F01N2900/1812 - Flow rate
F01N2900/1602 - Temperature of exhaust gas apparatus

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F02D2200/0802 - Temperature of the exhaust gas treatment apparatus

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N13/0093 - {the purifying devices are of the same type}
F01N2560/023 - for measuring or detecting HC

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F02D41/1445 - {the characteristics being related to the exhaust flow}
F02D41/027 - {to purge or regenerate the exhaust gas treating apparatus}

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DOE Contract Number:: FC26-02NT41218

Resource Type:: Patent

Resource Relation:: Patent File Date: 2009 Sep 29

Country of Publication:: United States

Language:: English

Subject:: 22 GENERAL STUDIES OF NUCLEAR REACTORS

Citation Formats


                    Schmieg, Steven J, Viola, Michael B, Cheng, Shi-Wai S, Mulawa, Patricia A, Hilden, David L, Sloane, Thompson M, and Lee, Jong H. Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device.  United States: N. p., 2014. 
        Web.

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                    Schmieg, Steven J, Viola, Michael B, Cheng, Shi-Wai S, Mulawa, Patricia A, Hilden, David L, Sloane, Thompson M, & Lee, Jong H. Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device.  United States.

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                    Schmieg, Steven J, Viola, Michael B, Cheng, Shi-Wai S, Mulawa, Patricia A, Hilden, David L, Sloane, Thompson M, and Lee, Jong H. Tue .  
        "Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device".  United States.  https://www.osti.gov/servlets/purl/1130964.

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@article{osti_1130964,

  title        = {Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device},

  author       = {Schmieg, Steven J and Viola, Michael B and Cheng, Shi-Wai S and Mulawa, Patricia A and Hilden, David L and Sloane, Thompson M and Lee, Jong H},

  abstractNote = {A method for monitoring a hydrocarbon-selective catalytic reactor device of an exhaust aftertreatment system of an internal combustion engine operating lean of stoichiometry includes injecting a reductant into an exhaust gas feedstream upstream of the hydrocarbon-selective catalytic reactor device at a predetermined mass flowrate of the reductant, and determining a space velocity associated with a predetermined forward portion of the hydrocarbon-selective catalytic reactor device. When the space velocity exceeds a predetermined threshold space velocity, a temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is determined, and a threshold temperature as a function of the space velocity and the mass flowrate of the reductant is determined. If the temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is below the threshold temperature, operation of the engine is controlled to regenerate the hydrocarbon-selective catalytic reactor device.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2014},

  month        = {5}

}

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