US Patent No: 7,155,331

Number of patents in Portfolio can not be more than 2000

Method of prediction of NOx mass flow in exhaust

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Abstract

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Methods for estimating the mass flow rate of NOx in an exhaust stream by correlating the level of NOx to an engine parameter. The level of NOx can be estimated as a function of engine power, of intake pressure, of exhaust temperature, as a function of the percentage of O.sub.2 in the exhaust stream, or as a combination of any of these. Once the level of NOx is approximately known, the exhaust system of the engine system can be modified to improve the removal efficiency of NOx and exhaust particulate matter from the exhaust stream. These methods for estimating the NOx mass flow rate can be used for an exhaust configuration that includes a lean NOx catalyst (LNC), a selective catalytic reduction (SCR) catalyst, or a lean NOx trap (LNT). A particulate filter can be present in the exhaust configuration.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
DONALDSON COMPANY, INC.MINNEAPOLIS, MN799

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Angelo, Theodore G West St. Paul, MN 11 83
Zhang, Wenzhong Savage, MN 118 1348

Cited Art Landscape

Patent Info (Count) # Cites Year
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (4)
5,577,382 Exhaust purification device of internal combustion engine 89 1995
6,205,773 Exhaust gas purification device for an internal combustion engine 42 1999
6,634,345 Internal combustion engine and method for controlling the internal combustion engine 8 2001
6,619,035 Exhaust emission control device of internal combustion engine 11 2002
 
Donaldson Company, Inc. (2)
4,851,015 Muffler apparatus with filter trap and method of use 80 1987
5,355,973 Muffler with catalytic converter arrangement; and method 38 1992
 
FORD GLOBAL TECHNOLOGIES, INC. (2)
6,499,293 Method and system for reducing NOx tailpipe emissions of a lean-burn internal combustion engine 9 2000
6,470,675 System and method controlling engine based on predicated engine operating conditions 4 2001
 
HITACHI, LTD. (2)
2002/0050,135 Apparatus for purifying and controlling exhaust gases 3 2001
2002/0184,877 Engine exhaust purifying apparatus 6 2002
 
BARRACK TECHNOLOGY LIMITED (1)
5,219,227 Method and apparatus for determining burned gas temperature, trapped mass and NO.sub.x emissions in an internal combustion engine 10 1990
 
ENGELHARD CORPORATION (1)
6,125,629 Staged reductant injection for improved NO.sub.x reduction 110 1998
 
FORD GLOBAL TECHNOLOGIES, LLC (1)
6,679,051 Diesel engine system for use with emission control device 16 2002
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (1)
5,946,906 Exhaust gas purification system of internal combustion engine 45 1997
 
JOHNSON MATTHEY PUBLIC LIMITED COMPANY (1)
6,948,308 Combatting air pollution 7 2003
 
KAWASAKI JUKOGYO KABUSHIKI KAISHA (1)
6,718,772 Method of thermal NOx reduction in catalytic combustion systems 14 2001
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
6,345,498 Exhaust gas purifier for internal combustion engine 20 1999
 
ROBERT BOSCH GMBH (1)
5,606,856 Arrangement for an after treatment of exhaust gases from an internal combustion engine 30 1995
 
TELEDYNE MONITOR LABS, INC. (1)
5,486,336 NOX sensor assembly 23 1993
 
TNO Automotive (1)
6,415,602 Control system for mobile NOx SCR applications 80 2000
 
Other [Check patent profile for assignment information] (1)
6,164,063 Apparatus and method for emissions containment and reduction 56 1999

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
CATERPILLAR INC. (3)
8,209,956 SCR emissions control system 1 2007
8,001,769 Control of SCR system having a filtering device 2 2007
7,992,380 Emission control system implementing reduction agent injection 0 2008
 
GENERAL ELECTRIC COMPANY (2)
7,987,663 Methods for reducing emissions from diesel engines 2 2007
8,056,322 System and method for supplying oxygenate reductants to an emission treatment system 1 2008
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (2)
7,926,263 Regeneration system and method for exhaust aftertreatment devices 3 2007
8,108,154 emission estimation systems and methods 0 2008
 
Donaldson Company, Inc. (1)
8,783,022 Retrofit aftertreatment system for treating diesel exhaust 0 2010
 
HONDA MOTOR CO., LTD. (1)
8,620,561 Control for internal combustion engine provided with cylinder halting mechanism 0 2008

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