US Patent No: 8,127,535
Number of patents in Portfolio can not be more than 2000
Method and system for purification of exhaust gas from diesel engines
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Mar 6, 2012
Issued date -
Dec 23, 2008
filing date -
12/342,924
serial no -
In Force
status
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Abstract
The invention provides a method and system for purification of a carbon monoxide, nitrogen oxides, incompletely combusted hydrocarbons and soot containing exhaust gas from a combustion engine comprising the steps of catalytically oxidizing the carbon monoxide in the exhaust gas, retaining soot and remaining amounts of hydrocarbons in the oxidised exhaust gas in a filter, addition of a reducing agent to gas and catalytically reducing nitrogen oxides, and obtaining a purified exhaust gas. The invention further comprises the steps of controlling a temperature in the oxidising catalyst by passing at least a part of the gas from the engine through a first side of a heat exchanger, and passing at least a part of the purified exhaust gas through a second side of the heat exchanger, and leading the remaining amount of the gas from the engine through a by-pass across the first side of the heat exchanger and leading the remaining amount of the purified exhaust gas through a by-pass across the second side of the heat exchanger.
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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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| 7,275,366 High thermal efficiency Selective Catalytic Reduction (SCR) system | 20 | 2004 | |
| 2006/0213,197 Air pollution control system for ocean-going vessels | 4 | 2005 | |
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| 2007/0125,072 LNT desulfation strategy with reformer temperature management | 6 | 2005 | |
| 2007/0089,717 OXIDATION CATALYST COATING IN A HEAT EXCHANGER | 6 | 2005 | |
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| 2007/0059,227 Nitrogen oxides purification device | 1 | 2006 | |
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| 5,303,771 Double cross counterflow plate type heat exchanger | 15 | 1992 | |
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| 2006/0236,680 Method for regenerating a diesel particulate filter | 6 | 2005 | |
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| 2007/0137,184 Catalyzed SCR Filter and Emission Treatment System | 15 | 2007 | |
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| 6,347,511 Exhaust gas purification system for lean burn engine | 14 | 1999 | |
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| 2007/0221,366 Heat Exchanger | 1 | 2004 | |
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| 2007/0084,591 Device for moisture exchange between gas flows | 1 | 2004 | |
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| 6,840,313 Plate fin type heat exchanger for high temperature | 4 | 2002 | |
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| 2006/0096,282 METHOD AND APPARATUS FOR PURIFYING EXHAUST GASES | 9 | 2004 | |
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| 6,709,640 Process and apparatus for interbed injection in plate reactor arrangement | 20 | 2000 | |
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| 2006/0196,176 APPARATUS FOR ADJUSTING THE TEMPERATURE OF EXHAUST GASES | 1 | 2005 | |
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| 5,823,247 Heat exchanger and method | 3 | 1996 | |
| 2005/0098,042 Filtering device at a controlled temperature | 1 | 2004 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Sep 6, 2015 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 6, 2019 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 6, 2023 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |