Engine control systems and methods for nitrogen oxide reduction

Title: Engine control systems and methods for nitrogen oxide reduction

Abstract

A fuel control module controls fuel injection of an engine based on a predetermined lean air/fuel ratio. The predetermined lean air/fuel ratio is fuel lean relative to a stoichiometric air/fuel ratio for the fuel. A cylinder control module selectively deactivates opening of intake and exhaust valves of M cylinders of the engine to increase removal of nitrogen oxide (NOx) from exhaust. M is an integer greater than 0 and less than a total number of cylinders of the engine. The fuel control module further: disables fueling of the M cylinders while opening of the intake and exhaust valves of the M cylinders is deactivated; and, while fueling of the M cylinders is disabled and opening of the intake and exhaust valves of the M cylinders is deactivated, controls fuel injection of other cylinders based on a predetermined rich air/fuel ratio that is fuel rich relative to the stoichiometric air/fuel ratio.

Inventors:: Sczomak, David P.; Gallon, Robert J.; McAlpine, Robert S.; Solomon, Arun S.

Issue Date:: 2018-09-18

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1483376

Patent Number(s):: 10,077,727

Application Number:: 14/994,531

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

DOE Contract Number:: EE00006853

Resource Type:: Patent

Resource Relation:: Patent File Date: 2016 Jan 13

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Sczomak, David P., Gallon, Robert J., McAlpine, Robert S., and Solomon, Arun S. Engine control systems and methods for nitrogen oxide reduction.  United States: N. p., 2018. 
        Web.

Copy to clipboard


                    Sczomak, David P., Gallon, Robert J., McAlpine, Robert S., & Solomon, Arun S. Engine control systems and methods for nitrogen oxide reduction.  United States.

Copy to clipboard


                    Sczomak, David P., Gallon, Robert J., McAlpine, Robert S., and Solomon, Arun S. Tue .  
        "Engine control systems and methods for nitrogen oxide reduction".  United States.  https://www.osti.gov/servlets/purl/1483376.

Copy to clipboard


                    
@article{osti_1483376,

  title        = {Engine control systems and methods for nitrogen oxide reduction},

  author       = {Sczomak, David P. and Gallon, Robert J. and McAlpine, Robert S. and Solomon, Arun S.},

  abstractNote = {A fuel control module controls fuel injection of an engine based on a predetermined lean air/fuel ratio. The predetermined lean air/fuel ratio is fuel lean relative to a stoichiometric air/fuel ratio for the fuel. A cylinder control module selectively deactivates opening of intake and exhaust valves of M cylinders of the engine to increase removal of nitrogen oxide (NOx) from exhaust. M is an integer greater than 0 and less than a total number of cylinders of the engine. The fuel control module further: disables fueling of the M cylinders while opening of the intake and exhaust valves of the M cylinders is deactivated; and, while fueling of the M cylinders is disabled and opening of the intake and exhaust valves of the M cylinders is deactivated, controls fuel injection of other cylinders based on a predetermined rich air/fuel ratio that is fuel rich relative to the stoichiometric air/fuel ratio.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {9}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Two-cycle engine with fuel injection
patent, December 1981

Staerzl, Richard
US Patent Document 4,305,351
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%2F4305351

Method of removing nitrogen oxides in exhaust gases from a diesel engine
patent, June 1991

Kobayashi, Motonobu; Kinoshita, Futoru; Hagi, Mitsuharu
US Patent Document 5,021,227
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%2F5021227

Controller for four-stroke cycle internal-combustion engine
patent, November 1996

Fukui, Wataru; Ohashi, Yutaka
US Patent Document 5,575,259
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%2F5575259

Method and a device for purifying combustion exhaust gas
patent, July 1998

Kinugasa, Yukio; Itou, Takaaki; Suzuki, Naoto
US Patent Document 5,778,667
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%2F5778667

Device for purifying exhaust gas of an engine
patent, July 1998

Kinugasa, Yukio; Igarashi, Kouhei; Itou, Takaaki
US Patent Document 5,782,087
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%2F5782087

Method and device for purifying exhaust gas of engine
patent, April 2000

Kinugasa, Yukio; Igarashi, Kouhei; Itou, Takaaki
US Patent Document 6,047,542
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%2F6047542

Mass fraction burned and pressure estimation through spark plug ion sensing
patent, July 2000

Daniels, Chao Fu
US Patent Document 6,089,077
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%2F6089077

Exhaust gas purification device for an internal combustion engine
patent, August 2000

Kinugasa, Yukio; Itou, Takaaki; Takeuchi, Koichi
US Patent Document 6,109,024
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%2F6109024

Insulator shield for spark plug
patent, May 2001

Miller, Kevin
US Patent Document 6,227,164
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%2F6227164

Method and device for purifying exhaust gas of an engine
patent, February 2002

Fuwa, Naohide; Tanaka, Hiroshi; Kinugasa, Yukio
US Patent Document 6,345,496
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%2F6345496

System and method for eliminating pocket sparking in an internal combustion engine
patent, March 2002

Bridge, Matthew; Binversie, Gregory
US Patent Document 6,357,408
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%2F6357408

Reducing no emissions from an engine by on-demand generation of ammonia for selective catalytic reduction
patent, March 2002

Peter-Hoblyn, Jeremy; Balles, Eric; Hofmann, John
US Patent Document 6,361,754
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%2F6361754

Method and system for controlling fuel injection for direct injection-spark ignition engine
patent, June 2002

Mamiya, Kiyotaka; Yamamoto, Hiroyuki; Araki, Keiji
US Patent Document 6,401,703
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%2F6401703

Engine control system for controlling in-cylinder fuel injection engine
patent, February 2003

Nogi, Toshiharu; Shiraishi, Takuya; Ohsuga, Minoru
US Patent Document 6,520,142
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%2F6520142

Directional microphone assembly
patent, May 2003

Killion, Mead; Stewart, Jonathan; Wilson, Don
US Patent Document 6,567,526
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%2F6567526

System and method for enhanced combustion control in an internal combustion engine
patent, August 2003

Yamaguchi, Koichi; Urushihara, Tomonori; Yoshizawa, Koudai
US Patent Document 6,609,493
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%2F6609493

Spark ignition direct injection engine with shaped multihole injectors
patent, December 2003

Lippert, Andreas; El Tahry, Sherif Hussein; Inoue, Hiroaki
US Patent Document 6,659,074
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%2F6659074

Exhaust-gas cleaning system and method with internal ammonia generation, for the reduction of nitrogen oxides
patent, December 2003

Gunther, Josef; Krutzsch, Bernd; Schoen, Christof
US Patent Document 6,662,552
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%2F6662552

Real-time nitrogen oxides (NOx) estimation process
patent, August 2004

Ali, Moataz; Gangopadhyay, Anupam
US Patent Document 6,775,623
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%2F6775623

Internal combustion engine with injection of gaseous fuel
patent, February 2005

Hilger, Ulrich; Bartunek, Bernd; Oversby, Kevin
US Patent Document 6,854,438
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%2F6854438

Engine cylinder deactivation to improve the performance of exhaust emission control systems
patent, June 2005

Foster, Michael; Foster, Matthew; Price, Kenneth
US Patent Document 6,904,752
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%2F6904752

Narrow speed range diesel-powered engine system w/ aftertreatment devices
patent, June 2006

Hu, Haoran; Stover, Thomas; McCarthy, James
US Patent Document 7,063,642
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%2F7063642

Method for operating an internal combustion engine
patent, December 2006

Abet, Oliver; Hertweck, Gernot; Muehleisen, Thomas
US Patent Document 7,152,573
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%2F7152573

Exhaust gas purifying apparatus and method for internal combustion engine, and engine control unit
patent, April 2007

Yasui, Yuji; Iwamoto, Jun; Ogihara, Hidemi
US Patent Document 7,204,081
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%2F7204081

Air-fuel ratio control apparatus for internal combustion engine
patent, May 2008

Miyashita, Shigeki
US Patent Document 7,377,273
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%2F7377273

Engine exhaust emission control system providing on-board ammonia generation
patent, January 2009

Hemingway, Mark; Christopher, Brian; Thornton, Michael
US Patent Document 7,472,545
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%2F7472545

Method and apparatus for operating a spark-ignited direct fuel injection engine
patent, November 2009

Lippert, Andreas; Otto, Ronald; Parrish, Scott
US Patent Document 7,610,900
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%2F7610900

Exhaust gas purification apparatus
patent, March 2010

Yano, Masakazu; Adachi, Takayuki
US Patent Document 7,673,444
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%2F7673444

Process for reducing agent control in an exhaust gas aftertreatment system
patent, June 2010

Gloeckle, Markus
US Patent Document 7,731,925
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%2F7731925

Exhaust gas aftertreatment installation and method
patent, October 2010

Bandl-Konrad, Brigitte; Hertzberg, Andreas; Krutzsch, Bernd
US Patent Document 7,814,747
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%2F7814747

Lean nitrogen oxide emission control system and method
patent, October 2011

Brown, David; Cleary, David; Li, Wei
US Patent Document 8,041,498
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%2F8041498

Technique for production of ammonia on demand in a three way catalyst for a passive selective catalytic reduction system
patent, January 2012

Perry, Kevin; Cleary, David; Narayanaswamy, Kushal
US Patent Document 8,091,342
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%2F8091342

Direct-injection spark-ignition system
patent, April 2012

Solomon, Arun; Otto, Ronald; Szymkowicz, Patrick
US Patent Document 8,146,555
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%2F8146555

Method and apparatus for controlling exhaust emissions in a spark-ignition direct-injection engine
patent, October 2012

Perry, Kevin; Sloane, Thompson; Lee, Jong
US Patent Document 8,291,695
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%2F8291695

Passive ammonia-selective catalytic reduction for NOx control in internal combustion engines
patent, February 2013

Brinkman, Norman; Najt, Paul; Narayanaswamy, Kushal
US Patent Document 8,381,512
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%2F8381512

Passive ammonia-selective catalytic reduction for NOx control in internal combustion engines
patent, March 2013

Perry, Kevin; Ramanathan, Karthik; Gopinath, Ashok
US Patent Document 8,393,140
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%2F8393140

Technique for production of ammonia on demand in a three way catalyst for a passive selective catalytic reduction system
patent, April 2013

Narayanaswamy, Kushal; Najt, Paul
US Patent Document 8,424,289
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%2F8424289

Method and apparatus for controlling operation of a spark-ignition direct-injection engine
patent, May 2013

Najt, Paul; Narayanaswamy, Kushal; Perry, Kevin
US Patent Document 8,448,423
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%2F8448423

Emission control apparatus of internal combustion engine
patent-application, June 2002

Irisawa, Yasuyuki; Tanaka, Hiroshi; Kako, Junichi
US Patent Application 09/998181; 20020069640
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220020069640%22.PGNR.&OS=DN/20020069640&RS=DN/20020069640

Selective catalytic reduction system
patent-application, June 2007

Driscoll, James
US Patent Application 11/312346; 20070137182
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220070137182%22.PGNR.&OS=DN/20070137182&RS=DN/20070137182

Cylinder Deactivation to Reduce Fuel Enrichment After Fuel Cutoff Modes
patent-application, April 2011

Gallon, Robert Jack; Hayman, Alan W.; McAlpine, Robert S.
US Patent Application 12/578843; 20110083639
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220110083639%22.PGNR.&OS=DN/20110083639&RS=DN/20110083639

Method For Operating A Spark-Ignition, Direct-Injection Internal Combustion Engine
patent-application, December 2012

Narayanaswamy, Kushal; Koch, Calvin; Najt, Paul
US Patent Application 13/156655; 20120316754
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220120316754%22.PGNR.&OS=DN/20120316754&RS=DN/20120316754

In-Situ NH3 Generation for SCR NOx Applications
conference, October 2002

Ogunwumi, S.; Fox, R.; Patil, M. D.
SAE Powertrain & Fluid Systems Conference & Exhibition
DOI: 10.4271/2002-01-2872

“Catalytic Engine” NOx Reduction of Diesel Engines with New Concept Onboard Ammonia Synthesis System
conference, February 1992

Nakahira, Toshio; Tsujimura, Kinji; Kakegawa, Toshiaki
International Congress & Exposition
DOI: 10.4271/920469

A NO_x reduction system using ammonia-storage selective catalytic reduction in rich/lean excursions
journal, November 2007

Nakatsuji, Tadao; Matsubara, Manabu; Rouistenmäki, Juhana
Applied Catalysis B: Environmental, Vol. 77, Issue 1-2, p. 190-201
DOI: 10.1016/j.apcatb.2007.07.018

Three-Way Catalyst Design for Urealess Passive Ammonia SCR: Lean-Burn SIDI Aftertreatment System
conference, April 2011

Kim, Chang Hwan; Perry, Kevin; Viola, Michael
SAE 2011 World Congress & Exhibition
DOI: 10.4271/2011-01-0306

Similar Records in DOE Patents and OSTI.GOV collections:

System and method for controlling ammonia levels in a selective catalytic reduction catalyst using a nitrogen oxide sensor

Patent

A system according to the principles of the present disclosure includes an air/fuel ratio determination module and an emission level determination module. The air/fuel ratio determination module determines an air/fuel ratio based on input from an air/fuel ratio sensor positioned downstream from a three-way catalyst that is positioned upstream from a selective catalytic reduction (SCR) catalyst. The emission level determination module selects one of a predetermined value and an input based on the air/fuel ratio. The input is received from a nitrogen oxide sensor positioned downstream from the three-way catalyst. The emission level determination module determines an ammonia level basedmore »« less
Full Text Available
System and method for selective catalytic reduction of nitrogen oxides in combustion exhaust gases

Patent Sobolevskiy, Anatoly; Rossin, Joseph A

A multi-stage selective catalytic reduction (SCR) unit (32) provides efficient reduction of NOx and other pollutants from about 50-550.degree. C. in a power plant (19). Hydrogen (24) and ammonia (29) are variably supplied to the SCR unit depending on temperature. An upstream portion (34) of the SCR unit catalyzes NOx+NH.sub.3 reactions above about 200.degree. C. A downstream portion (36) catalyzes NOx+H.sub.2 reactions below about 260.degree. C., and catalyzes oxidation of NH.sub.3, CO, and VOCs with oxygen in the exhaust above about 200.degree. C., efficiently removing NOx and other pollutants over a range of conditions with low slippage of NH.sub.3. Anmore »« less
Full Text Available
System and method for controlling an engine based on ammonia storage in multiple selective catalytic reduction catalysts

Patent Sun, MIn; Perry, Kevin L.

A system according to the principles of the present disclosure includes a storage estimation module and an air/fuel ratio control module. The storage estimation module estimates a first amount of ammonia stored in a first selective catalytic reduction (SCR) catalyst and estimates a second amount of ammonia stored in a second SCR catalyst. The air/fuel ratio control module controls an air/fuel ratio of an engine based on the first amount, the second amount, and a temperature of a substrate disposed in the second SCR catalyst.
Full Text Available
Method For Selective Catalytic Reduction Of Nitrogen Oxides

Patent Mowery-Evans, Deborah L [Broomfield, CO]; Gardner, Timothy J [Albuquerque, NM]; McLaughlin, Linda I [Albuquerque, NM]

A method for catalytically reducing nitrogen oxide compounds (NO.sub.x, defined as nitric oxide, NO, +nitrogen dioxide, NO.sub.2) in a gas by a material comprising a base metal consisting essentially of CuO and Mn, and oxides of Mn, on an activated metal hydrous metal oxide support, such as HMO:Si. A promoter, such as tungsten oxide or molybdenum oxide, can be added and has been shown to increase conversion efficiency. This method provides good conversion of NO.sub.x to N.sub.2, good selectivity, good durability, resistance to SO.sub.2 aging and low toxicity compared with methods utilizing vanadia-based catalysts.
Full Text Available
Catalyst and method for reduction of nitrogen oxides

Patent Ott, Kevin C [Los Alamos, NM]

A Selective Catalytic Reduction (SCR) catalyst was prepared by slurry coating ZSM-5 zeolite onto a cordierite monolith, then subliming an iron salt onto the zeolite, calcining the monolith, and then dipping the monolith either into an aqueous solution of manganese nitrate and cerium nitrate and then calcining, or by similar treatment with separate solutions of manganese nitrate and cerium nitrate. The supported catalyst containing iron, manganese, and cerium showed 80 percent conversion at 113 degrees Celsius of a feed gas containing nitrogen oxides having 4 parts NO to one part NO.sub.2, about one equivalent ammonia, and excess oxygen; conversion improvedmore »« less
Full Text Available

Similar Records

Title: Engine control systems and methods for nitrogen oxide reduction

Abstract

Citation Formats

Two-cycle engine with fuel injection patent, December 1981

Method of removing nitrogen oxides in exhaust gases from a diesel engine patent, June 1991

Controller for four-stroke cycle internal-combustion engine patent, November 1996

Method and a device for purifying combustion exhaust gas patent, July 1998

Device for purifying exhaust gas of an engine patent, July 1998

Method and device for purifying exhaust gas of engine patent, April 2000

Mass fraction burned and pressure estimation through spark plug ion sensing patent, July 2000

Exhaust gas purification device for an internal combustion engine patent, August 2000

Insulator shield for spark plug patent, May 2001

Method and device for purifying exhaust gas of an engine patent, February 2002

System and method for eliminating pocket sparking in an internal combustion engine patent, March 2002

Reducing no emissions from an engine by on-demand generation of ammonia for selective catalytic reduction patent, March 2002

Method and system for controlling fuel injection for direct injection-spark ignition engine patent, June 2002

Engine control system for controlling in-cylinder fuel injection engine patent, February 2003

Directional microphone assembly patent, May 2003

System and method for enhanced combustion control in an internal combustion engine patent, August 2003

Spark ignition direct injection engine with shaped multihole injectors patent, December 2003

Exhaust-gas cleaning system and method with internal ammonia generation, for the reduction of nitrogen oxides patent, December 2003

Real-time nitrogen oxides (NOx) estimation process patent, August 2004

Internal combustion engine with injection of gaseous fuel patent, February 2005

Engine cylinder deactivation to improve the performance of exhaust emission control systems patent, June 2005

Narrow speed range diesel-powered engine system w/ aftertreatment devices patent, June 2006

Method for operating an internal combustion engine patent, December 2006

Exhaust gas purifying apparatus and method for internal combustion engine, and engine control unit patent, April 2007

Air-fuel ratio control apparatus for internal combustion engine patent, May 2008

Engine exhaust emission control system providing on-board ammonia generation patent, January 2009

Method and apparatus for operating a spark-ignited direct fuel injection engine patent, November 2009

Exhaust gas purification apparatus patent, March 2010

Process for reducing agent control in an exhaust gas aftertreatment system patent, June 2010

Exhaust gas aftertreatment installation and method patent, October 2010

Lean nitrogen oxide emission control system and method patent, October 2011

Technique for production of ammonia on demand in a three way catalyst for a passive selective catalytic reduction system patent, January 2012

Direct-injection spark-ignition system patent, April 2012

Method and apparatus for controlling exhaust emissions in a spark-ignition direct-injection engine patent, October 2012

Passive ammonia-selective catalytic reduction for NOx control in internal combustion engines patent, February 2013

Passive ammonia-selective catalytic reduction for NOx control in internal combustion engines patent, March 2013

Technique for production of ammonia on demand in a three way catalyst for a passive selective catalytic reduction system patent, April 2013

Method and apparatus for controlling operation of a spark-ignition direct-injection engine patent, May 2013

Emission control apparatus of internal combustion engine patent-application, June 2002

Selective catalytic reduction system patent-application, June 2007

Cylinder Deactivation to Reduce Fuel Enrichment After Fuel Cutoff Modes patent-application, April 2011

Method For Operating A Spark-Ignition, Direct-Injection Internal Combustion Engine patent-application, December 2012

In-Situ NH3 Generation for SCR NOx Applications conference, October 2002

“Catalytic Engine” NOx Reduction of Diesel Engines with New Concept Onboard Ammonia Synthesis System conference, February 1992

A NOx reduction system using ammonia-storage selective catalytic reduction in rich/lean excursions journal, November 2007

Three-Way Catalyst Design for Urealess Passive Ammonia SCR: Lean-Burn SIDI Aftertreatment System conference, April 2011

Two-cycle engine with fuel injection
patent, December 1981

Method of removing nitrogen oxides in exhaust gases from a diesel engine
patent, June 1991

Controller for four-stroke cycle internal-combustion engine
patent, November 1996

Method and a device for purifying combustion exhaust gas
patent, July 1998

Device for purifying exhaust gas of an engine
patent, July 1998

Method and device for purifying exhaust gas of engine
patent, April 2000

Mass fraction burned and pressure estimation through spark plug ion sensing
patent, July 2000

Exhaust gas purification device for an internal combustion engine
patent, August 2000

Insulator shield for spark plug
patent, May 2001

Method and device for purifying exhaust gas of an engine
patent, February 2002

System and method for eliminating pocket sparking in an internal combustion engine
patent, March 2002

Reducing no emissions from an engine by on-demand generation of ammonia for selective catalytic reduction
patent, March 2002

Method and system for controlling fuel injection for direct injection-spark ignition engine
patent, June 2002

Engine control system for controlling in-cylinder fuel injection engine
patent, February 2003

Directional microphone assembly
patent, May 2003

System and method for enhanced combustion control in an internal combustion engine
patent, August 2003

Spark ignition direct injection engine with shaped multihole injectors
patent, December 2003

Exhaust-gas cleaning system and method with internal ammonia generation, for the reduction of nitrogen oxides
patent, December 2003

Real-time nitrogen oxides (NOx) estimation process
patent, August 2004

Internal combustion engine with injection of gaseous fuel
patent, February 2005

Engine cylinder deactivation to improve the performance of exhaust emission control systems
patent, June 2005

Narrow speed range diesel-powered engine system w/ aftertreatment devices
patent, June 2006

Method for operating an internal combustion engine
patent, December 2006

Exhaust gas purifying apparatus and method for internal combustion engine, and engine control unit
patent, April 2007

Air-fuel ratio control apparatus for internal combustion engine
patent, May 2008

Engine exhaust emission control system providing on-board ammonia generation
patent, January 2009

Method and apparatus for operating a spark-ignited direct fuel injection engine
patent, November 2009

Exhaust gas purification apparatus
patent, March 2010

Process for reducing agent control in an exhaust gas aftertreatment system
patent, June 2010

Exhaust gas aftertreatment installation and method
patent, October 2010

Lean nitrogen oxide emission control system and method
patent, October 2011

Technique for production of ammonia on demand in a three way catalyst for a passive selective catalytic reduction system
patent, January 2012

Direct-injection spark-ignition system
patent, April 2012

Method and apparatus for controlling exhaust emissions in a spark-ignition direct-injection engine
patent, October 2012

Passive ammonia-selective catalytic reduction for NOx control in internal combustion engines
patent, February 2013

Passive ammonia-selective catalytic reduction for NOx control in internal combustion engines
patent, March 2013

Technique for production of ammonia on demand in a three way catalyst for a passive selective catalytic reduction system
patent, April 2013

Method and apparatus for controlling operation of a spark-ignition direct-injection engine
patent, May 2013

Emission control apparatus of internal combustion engine
patent-application, June 2002

Selective catalytic reduction system
patent-application, June 2007

Cylinder Deactivation to Reduce Fuel Enrichment After Fuel Cutoff Modes
patent-application, April 2011

Method For Operating A Spark-Ignition, Direct-Injection Internal Combustion Engine
patent-application, December 2012

In-Situ NH3 Generation for SCR NOx Applications
conference, October 2002

“Catalytic Engine” NOx Reduction of Diesel Engines with New Concept Onboard Ammonia Synthesis System
conference, February 1992

A NO_x reduction system using ammonia-storage selective catalytic reduction in rich/lean excursions
journal, November 2007

Three-Way Catalyst Design for Urealess Passive Ammonia SCR: Lean-Burn SIDI Aftertreatment System
conference, April 2011