Combustion driven ammonia generation strategies for passive ammonia SCR system

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

Full Record
Other Related Research

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):: 9512793

Application Number:: 13/652,549

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

Patent Classifications (CPCs):: Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

Show more

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 F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F02D41/0235 - {in relation with the state of the 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}
F01N3/2066 - {Selective catalytic reduction [SCR]}
F01N2240/25 - an ammonia generator
F01N3/101 - {Three-way catalysts}
F01N2610/02 - the substance being ammonia or urea

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F02D41/008 - {Controlling each cylinder individually}

Show less

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.

Copy to clipboard


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

Copy to clipboard


                    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.

Copy to clipboard


                    
@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}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

System and method for determining an ammonia generation rate in a three-way catalyst

Patent Sun, Min; Perry, Kevin L; Kim, Chang H

A system according to the principles of the present disclosure includes a rate determination module, a storage level determination module, and an air/fuel ratio control module. The rate determination module determines an ammonia generation rate in a three-way catalyst based on a reaction efficiency and a reactant level. The storage level determination module determines an ammonia storage level in a selective catalytic reduction (SCR) catalyst positioned downstream from the three-way catalyst based on the ammonia generation rate. The air/fuel ratio control module controls an air/fuel ratio of an engine based on the ammonia storage level.
Full Text Available
On-board ammonia generation and exhaust after treatment system using same

Patent Driscoll, Josh [Dunlap, IL]; Robel, Wade J [Peoria, IL]; Brown, Cory A [Pekin, IL]; ...

Often NOx selective catalysts that use ammonia to reduce NOx within exhaust to a harmless gas require on-board storage of ammonia which can be hazardous and inconvenient. In order to generate ammonia in exhaust, the present disclosure increases a NOx concentration in exhaust from at least one combustion chamber, at least in part, by injecting fuel in a predetermined increased NOx generation sequence that includes a first injection during non-auto ignition conditions and a second injection during auto ignition conditions. At least a portion of the NOx is converted to ammonia by passing at least a portion of the exhaustmore »« less
Full Text Available
Mitigation of steam generator tube rupture in a pressurized water reactor with passive safety systems

Patent McDermott, Daniel J [Export, PA]; Schrader, Kenneth J [Penn Hills, PA]; Schulz, Terry L [Murrysville Boro, PA]

The effects of steam generator tube ruptures in a pressurized water reactor are mitigated by reducing the pressure in the primary loop by diverting reactor coolant through the heat exchanger of a passive heat removal system immersed in the in containment refueling water storage tank in response to a high feed water level in the steam generator. Reactor coolant inventory is maintained by also in response to high steam generator level introducing coolant into the primary loop from core make-up tanks at the pressure in the reactor coolant system pressurizer. The high steam generator level is also used to isolatemore »« less
Full Text Available
System and method for generation of event driven, tuple-space based programs

Patent Baskaran, Muthu M.; Henretty, Thomas; Langston, M. H.; ...

In a system for automatic generation of event-driven, tuple-space based programs from a sequential specification, a hierarchical mapping solution can target different runtimes relying on event-driven tasks (EDTs). The solution uses loop types to encode short, transitive relations among EDTs that can be evaluated efficiently at runtime. Specifically, permutable loops translate immediately into conservative point-to-point synchronizations of distance one. A runtime-agnostic which can be used to target the transformed code to different runtimes.
Full Text Available
Oxy-fuel combustion and power generation system

Patent Alekseev, Alexander; Jovanovic, Stevan

Integration of an oxyfuel combustion boiler at elevated pressures and a heat exchanger is achieved to produce carbon dioxide by feeding flue gas comprising carbon dioxide and water from the oxyfuel combustion boiler to a direct contact cooler column wherein water is condensed at a temperature of 0 to 10° C. lower than its dew point; feeding a portion of the condensed water from the direct contact cooler column to the oxyfuel combustion boiler; feeding a portion of the carbon dioxide from the direct contact cooler column to the oxyfuel combustion boiler; and recovering a portion of the carbon dioxidemore » from the direct contact cooler column.« less
Full Text Available

Similar Records