Combustion driven ammonia generation strategies for passive ammonia SCR system

Title: Combustion driven ammonia generation strategies for passive ammonia SCR system

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Abstract

A method for controlling ammonia generation in an exhaust gas feedstream output from an internal combustion engine equipped with an exhaust aftertreatment system including a first aftertreatment device includes executing an ammonia generation cycle to generate ammonia on the first aftertreatment device. A desired air-fuel ratio output from the engine and entering the exhaust aftertreatment system conducive for generating ammonia on the first aftertreatment device is determined. Operation of a selected combination of a plurality of cylinders of the engine is selectively altered to achieve the desired air-fuel ratio entering the exhaust aftertreatment system.

Inventors:: Toner, Joel G.; Narayanaswamy, Kushal; Szekely, Jr., Gerald A.; Najt, Paul M.

Issue Date:: 2016-12-06

Research Org.:: GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1334661

Patent Number(s):: 9,512,793

Application Number:: 13/652,549

Assignee:: GM GLOBAL TECHNOLOGY OPERATIONS LLC (Detroit, MI)

DOE Contract Number:: EE0003379

Resource Type:: Patent

Resource Relation:: Patent File Date: 2012 Oct 16

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; 54 ENVIRONMENTAL SCIENCES

Citation Formats


                    Toner, Joel G., Narayanaswamy, Kushal, Szekely, Jr., Gerald A., and Najt, Paul M. Combustion driven ammonia generation strategies for passive ammonia SCR system.  United States: N. p., 2016. 
        Web.

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                    Toner, Joel G., Narayanaswamy, Kushal, Szekely, Jr., Gerald A., & Najt, Paul M. Combustion driven ammonia generation strategies for passive ammonia SCR system.  United States.

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                    Toner, Joel G., Narayanaswamy, Kushal, Szekely, Jr., Gerald A., and Najt, Paul M. Tue .  
        "Combustion driven ammonia generation strategies for passive ammonia SCR system".  United States.  https://www.osti.gov/servlets/purl/1334661.

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@article{osti_1334661,

  title        = {Combustion driven ammonia generation strategies for passive ammonia SCR system},

  author       = {Toner, Joel G. and Narayanaswamy, Kushal and Szekely, Jr., Gerald A. and Najt, Paul M.},

  abstractNote = {A method for controlling ammonia generation in an exhaust gas feedstream output from an internal combustion engine equipped with an exhaust aftertreatment system including a first aftertreatment device includes executing an ammonia generation cycle to generate ammonia on the first aftertreatment device. A desired air-fuel ratio output from the engine and entering the exhaust aftertreatment system conducive for generating ammonia on the first aftertreatment device is determined. Operation of a selected combination of a plurality of cylinders of the engine is selectively altered to achieve the desired air-fuel ratio entering the exhaust aftertreatment system.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2016},

  month        = {12}

}

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