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
Stats
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Dec 26, 2006
Issued date -
Dec 14, 2004
filing date -
11/012,075
serial no -
In Force
status
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Abstract
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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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 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 | 6 | 2001 | |
| 6,619,035 Exhaust emission control device of internal combustion engine | 11 | 2002 | |
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| 4,851,015 Muffler apparatus with filter trap and method of use | 72 | 1987 | |
| 5,355,973 Muffler with catalytic converter arrangement; and method | 34 | 1992 | |
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| 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 | 3 | 2001 | |
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| 2002/0050,135 Apparatus for purifying and controlling exhaust gases | 1 | 2001 | |
| 2002/0184,877 Engine exhaust purifying apparatus | 4 | 2002 | |
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| 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 | |
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| 6,125,629 Staged reductant injection for improved NO.sub.x reduction | 97 | 1998 | |
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| 6,679,051 Diesel engine system for use with emission control device | 14 | 2002 | |
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| 5,946,906 Exhaust gas purification system of internal combustion engine | 39 | 1997 | |
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| 6,948,308 Combatting air pollution | 4 | 2003 | |
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| 6,718,772 Method of thermal NOx reduction in catalytic combustion systems | 8 | 2001 | |
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| 6,345,498 Exhaust gas purifier for internal combustion engine | 20 | 1999 | |
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| 5,606,856 Arrangement for an after treatment of exhaust gases from an internal combustion engine | 28 | 1995 | |
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| 5,486,336 NOX sensor assembly | 22 | 1993 | |
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| 6,415,602 Control system for mobile NOx SCR applications | 64 | 2000 | |
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| 6,164,063 Apparatus and method for emissions containment and reduction | 42 | 1999 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
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| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jun 26, 2014 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 26, 2018 |
| Fee | Large entity fee | small entity fee | micro entity fee |
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| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
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