GB2452613A - Exhaust Treatment System with Catalyzed Coating on the Inner Wall of the Exhaust Pipe - Google Patents
Exhaust Treatment System with Catalyzed Coating on the Inner Wall of the Exhaust Pipe Download PDFInfo
- Publication number
- GB2452613A GB2452613A GB0816066A GB0816066A GB2452613A GB 2452613 A GB2452613 A GB 2452613A GB 0816066 A GB0816066 A GB 0816066A GB 0816066 A GB0816066 A GB 0816066A GB 2452613 A GB2452613 A GB 2452613A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exhaust
- wall
- housing
- aftertreatment
- injector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000011248 coating agent Substances 0.000 title abstract description 6
- 238000000576 coating method Methods 0.000 title abstract description 6
- 239000003054 catalyst Substances 0.000 claims abstract description 23
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 20
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004202 carbamide Substances 0.000 claims abstract description 20
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 14
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 10
- 239000013626 chemical specie Substances 0.000 claims abstract description 10
- 230000007062 hydrolysis Effects 0.000 claims abstract description 8
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000006722 reduction reaction Methods 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/40—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a hydrolysis catalyst
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Toxicology (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
An exhaust treatment system 10 for an internal combustion engine 16 comprising an exhaust tube 12, an injector 26 for injecting chemical species into an exhaust stream 18 and a catalyst 24, wherein the inner wall of the exhaust tube is coated with a catalytic coating 30. The coating 30 extends along the inner wall, along an outward taper 27 to the catalyst 24. The catalyst 24 could be an SCR (selective catalytic reduction) catalyst and/or a DOC (diesel oxidation catalyst) with a DPF (diesel particulate filter). The injector 26 injects chemical species such as urea into the exhaust stream. In the preferred embodiment the catalytic coating on the inner wall reacts with the injected urea in the exhaust stream prior to the stream reaching the SCR catalyst and accelerates the rate of urea hydrolysis to ammonia and reduces the urea crystalline formation on the inner walls of the exhaust tube 12. The exhaust tube may also comprise a mixer 28 which may be positioned either upstream or downstream of the injector 26.
Description
EXHAUST AFTER11EATMENT SYSTEM
WITH PRE-CATALYSIS
BACKGROUND AND SUMMARY
[00011 The invention relates to aftertreatment systems for internal combustion engine exhaust, and more particularly to chemical species injection, and catalysis.
100021 To address engine emission concerns, new standards continue to be proposed for substantial reduction of various emissions, including NO and particulate emissions. Increasingly stringent standards will require installation of aftertreatment devices in engine exhaust systems. Some of the afiertreatment technologies require certain chemical species to be injected into the exhaust system. For example, HC or fuel is injected in some active lean NO systems, and additives such as cerium and iron are injected for diesel particulate filter regeneration, and urea solution is injected in selective catalytic reduction (SCR) systems for NO reduction. These injected chemical species mix with exhaust gas before reaching downstream catalysts or filters.
BRIEF DESCRIPTION OF THE DRAWING
[00031 Sole Fig. 1 is a side schematic view of an exhaust aftertreatment system in accordance with the invention.
DETAILED DESCRIPTION
[00041 Fig. 1 shows an exhaust aftertreatment system 10 including an exhaust tube or housing 12 having an upstream inlet 14 for receiving engine exhaust from an internal combustion engine 16 as shown at arrow 18, and having a downstream outlet 20 for discharging the exhaust as shown at arrow 22. The exhaust tube carries exhaust to an aftertreatment element 24 in housing section 25 for treating the exhaust, for -1-.
example an SCR (selective catalytic reduction) catalyst andlor a DOC (diesel oxidation catalyst) or other oxidation catalysts and/or a DPF (diesel particulate filter) or other particulate filter. An injector 26 injects chemical species into the exhaust tube and mixing with the exhaust prior to reaching aftertreatment element 24. For example, in one embodiment, aqueous urea solution is injected at injector or doser 26. The injected urea decomposes and hydrolyzes to ammonia to react with and reduce NO in the exhaust.
For further description regarding exhaust aftertreatment systems, reference is made to the following U.S. Patents, incorporated herein by reference, namely U.S. Patents: 6,449,947; 6,601,385; 6,604,604; 6,712,869; 6,722,123; 7,211,226. In the preferred embodiment, a mixer 28 is provided in the exhaust tube upstream of aftertreatment element 24 and mixing the exhaust and the injected chemical species, as is known, for example in the noted incorporated patents, for example a turbulator, impactor, flow deflector, flow diffuser, etc. It is desired that the injected chemical species be well mixed with exhaust gas before reaching aftertreatment element 24.
[00051 Exhaust tube 12 has a catalyzed inner wall 30, e.g. provided by a catalytic coating, catalytically reacting with the exhaust prior to reaching aftertreatment element 24. Such catalyzed inner wall is upstream of aftertreatment element 24 and downstream of injector 26. Aftertreatment element 24 is supported in housing section 25. It is preferred that inner wall 30 extend to and along housing section 25 at outward taper 27 to aftertreatment element 24. Exhaust flows axially along an axial flow direction 32 to aftertreatrnent element 24. Inner wall 30 extends axially and parallel to exhaust flow along axial direction 32 and then is tapered outwardly at taper 27 along housing section 25 to aftertreatment element 24. Aftertreatment element 24 extends across and spans housing section 25 transversely to axial direction 32. In one embodiment, mixer 28 is downstream of injector 26. In another embodiment, as shown in dashed line, mixer 28a is upstream of injector 26. In a further embodiment, the mixer is catalyzed, e.g. with a catalytic coating, and catalytically reacts with the exhaust, for I I r example as in commonly owned co-pending U.S. Patent Application No. 11/360,941, filed February 23, 2006.
100061 In the preferred embodiment, exhaust aftertreatment system 10 is an SCR, selective catalytic reduction, system for engine exhaust, including an exhaust tube or housing 12 having the noted upstream inlet 14 for receiving engine exhaust at 18, and the noted downstream outlet at 20 for discharging the exhaust at 22, an injector 26 for injecting urea reductant into the housing to hydrolyze to ammonia to react with and reduce NO in the exhaust, an SCR catalyst 24 in the housing catalytically reacting with the exhaust, and wherein housing 12 has a catalyzed inner wall 30 catalytically reacting with the exhaust prior to reaching SCR catalyst 24 and accelerating the rate of urea hydrolysis to ammonia and reducing urea ciystalline formation on inner wall 30.
100071 The system further enables and provides a desirable method for reducing housing length in an SCR system, namely by providing housing 12 with a catalyzed inner wall 30 catalytically reacting with engine exhaust prior to reaching SCR catalyst 24 and accelerating the rate of urea hydrolysis to ammonia and reducing the length of inner wall 30 otherwise required between injector 26 and SCR catalyst 24. The urea reductant is injected in the exhaust flow upstream of the SCR catalyst, and the urea decomposes and hydrolyzes to ammonia on or upstream of SCR catalyst 24. The decomposition and hydrolysis typically takes place over a sufficiently long exhaust tube upstream of SCR catalyst 24. The length of such exhaust tube upstream of the SCR catalyst to enable sufficient decomposition and hydrolysis may be objectionable in vehicles with limited space and packaging constraints. The present system provides a simple and effective way of reducing such length.
[0008J Current production SCR systems used on low temperature duty cycle applications may experience issues with crystallization of the urea, which builds up on the inner surface of the exhaust tube and can cause blockage or restriction of exhaust gas flow. The present system reduces the occurrence of urea crystalline formation on inner wall 30 due to the catalytic reaction thereat. The present system thus both: a) reduces the length required of the decomposition or hydrolysis exhaust tube; and b) reduces the occurrence of ciystalline formation on the inner tube wall.
[00091 In the foregoing description, certain terms have been used for brevity, clearness, and understanding. No unnecessary limitations are to be implied therefrom beyond the requirement of the prior art because such terms are used for descriptive purposes and are intended to be broadly construed. The different configurations, systems, and method steps described herein may be used alone or in combination with other configurations, systems and method steps. It is to be expected that various equivalents, alternatives and modifications are possible within the scope of the appended claims.
Claims (13)
- What is claimed is: 1. An exhaust aftertreatment system comprising an exhaust tube carrying exhaust to an aftertreatment element treating said exhaust, an injector injecting chemical species into said exhaust tube and mixing with said exhaust prior to reaching said aftertreatment element, said exhaust tube having a catalyzed inner wall catalytically reacting with said exhaust prior to reaching said aftertreatment element.
- 2. The exhaust aftertreatment system according to claim 1 wherein said inner wall is upstream of said afiertreatment element and downstream of said injector.
- 3. The exhaust system according to claim 2 wherein said aftertreatment element is supported in a housing section, and said catalyzed inner wall extends to and along said housing section to said aftertreatment element.
- 4. The exhaust aftertreatment system according to claim 3 wherein said exhaust flows axially along an axial direction to said aftertreatment element, and wherein said inner wall extends axially and parallel to exhaust flow along said axial direction.
- 5. The exhaust aftertreatment system according to claim 4 wherein said aftertreatment element extends across and spans said housing section transversely to said axial direction.
- 6. The exhaust afiertreatment system according to claim 2 wherein said inner wall extends along said housing section at an outward taper to said aftertreatment element.
- 7. The exhaust aftertreatment system according to claim 6 wherein said exhaust flows axially along an axial flow direction to said aftertreatment element, and wherein said inner wall extends axial and parallel to exhaust flow along said axial direction and then is tapered outwardly at said taper along said housing section to said aftertreatment element.
- 8. The exhaust aftertreatment system according to claim 2 comprising a mixer in said exhaust tube mixing said exhaust and said chemical species.
- 9. The exhaust afiertreatment system according to claim 8 wherein said mixer is downstream of said injector.
- 10. The exhaust aftertreatment system according to claim 8 wherein said mixer is upstream of said injector.
- 11. The exhaust aftertreatment system according to claim 8 wherein said mixer is catalyzed and catalytically reacts with said exhaust.
- 12. An SCR, selective catalytic reduction, system for engine exhaust, comprising: a housing having an upstream inlet for receiving said exhaust, and a downstream outlet for discharging said exhaust; an injector injecting urea into said housing to hydrolyze to ammonia to react with and reduce NO in said exhaust; an SCR catalyst in said housing catalytically treating said exhaust; said housing having a catalyzed inner wall catalytically reacting with said exhaust prior to reaching said SCR catalyst and accelerating the rate of urea hydrolysis to ammonia and reducing urea crystalline formation on said inner wall.
- 13. A method for reducing housing length in an SCR, selective cataEytic reduction, system for engine exhaust having a housing having an upstream inlet for receiving said exhaust, and a downstream outlet for discharging said exhaust, an injector injecting urea into said housing to hydrolyze to ammonia to react with and reduce NO in said exhaust, and an SCR catalyst in said housing catalytically treating said exhaust, said method comprising providing said housing with a catalyzed inner wall catalytically reacting with said exhaust prior to reaching said SCR catalyst and accelerating the rate of urea hydrolysis to ammonia and reducing the length of said inner wall otherwise required between said injector and said SCR catalyst.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/849,488 US20090056319A1 (en) | 2007-09-04 | 2007-09-04 | Exhaust Aftertreatment System with Pre-Catalysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0816066D0 GB0816066D0 (en) | 2008-10-08 |
| GB2452613A true GB2452613A (en) | 2009-03-11 |
Family
ID=39866210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0816066A Withdrawn GB2452613A (en) | 2007-09-04 | 2008-09-03 | Exhaust Treatment System with Catalyzed Coating on the Inner Wall of the Exhaust Pipe |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20090056319A1 (en) |
| GB (1) | GB2452613A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2539239C2 (en) * | 2010-01-18 | 2015-01-20 | Сканиа Св Аб | Device and method to improve vehicle performance |
| US11033858B2 (en) * | 2017-06-16 | 2021-06-15 | Umicore Ag & Co. Kg | Combined soot filter and urea hydrolysis |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK3300791T3 (en) * | 2007-04-26 | 2019-06-11 | Johnson Matthey Plc | The transition metal / zeolite SCR catalyst |
| US20110239631A1 (en) * | 2010-04-05 | 2011-10-06 | Caterpillar Inc. | Ring Reductant Mixer |
| US20120222651A1 (en) * | 2010-04-13 | 2012-09-06 | Francis Xavier Gentile | Backwards Injected Engine |
| US8967115B2 (en) | 2010-04-13 | 2015-03-03 | Francis Xavier Gentile | Francis cycle backwards injected engine |
| JP2013524061A (en) * | 2010-04-13 | 2013-06-17 | ジェンティル，フランシス，ザビア | Reverse fuel injection engine |
| DE102010056314A1 (en) * | 2010-12-27 | 2012-06-28 | Friedrich Boysen Gmbh & Co. Kg | Device for distributing fluids in exhaust systems |
| US20130152555A1 (en) * | 2011-12-15 | 2013-06-20 | Caterpillar Inc. | Fluid injection lance with balanced flow distribution |
| CN103573358B (en) * | 2012-08-01 | 2015-11-18 | 北汽福田汽车股份有限公司 | The urea crystals of the SCR exhaust treatment system of motor inspects method |
| CN103406023B (en) * | 2013-08-16 | 2015-06-24 | 中持新兴环境技术中心（北京）有限公司 | POPs (Persistent Organic Pollutants) catalytic degradation device |
| JP2016094845A (en) * | 2014-11-12 | 2016-05-26 | いすゞ自動車株式会社 | Internal combustion engine and particular substance removal method of internal combustion engine |
| CN111894709B (en) | 2015-03-24 | 2022-09-06 | 康明斯排放处理公司 | Integrated aftertreatment system |
| FR3068730B1 (en) * | 2017-07-04 | 2020-02-14 | Faurecia Systemes D'echappement | INJECTION DEVICE FOR A VEHICLE EXHAUST LINE AND CORRESPONDING EXHAUST LINE |
| CN107559081A (en) * | 2017-10-10 | 2018-01-09 | 广西玉柴机器股份有限公司 | Diesel engine after treatment device |
| TWM611993U (en) * | 2020-08-27 | 2021-05-21 | 台灣福興工業股份有限公司 | Lock |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353208A (en) * | 1977-07-28 | 1982-10-12 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Exhaust gas purification apparatus for an internal combustion engine of motor vehicles |
| EP1676986A1 (en) * | 2003-09-30 | 2006-07-05 | Nissan Diesel Motor Co., Ltd. | Exhaust gas purification device and exhaust gas purification method for engine |
| WO2006108566A1 (en) * | 2005-04-15 | 2006-10-19 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method and device for the dosed provision of a reducing agent, especially a solid reducing agent, for exhaust gas systems |
| US20070051097A1 (en) * | 2005-09-02 | 2007-03-08 | Emitec Gesellschaft Fur Emissionstechnologie Mbh | Method and apparatus for adding a reactant to an exhaust gas from an internal combustion engine |
| US20070193252A1 (en) * | 2006-02-23 | 2007-08-23 | Mckinley Thomas L | Exhaust aftertreatment device with star-plugged turbulator |
| WO2008089956A2 (en) * | 2007-01-22 | 2008-07-31 | Süd-Chemie AG | Device for selective catalytic reduction of nox- in waste gases |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19731865C2 (en) * | 1997-07-24 | 1999-05-06 | Siemens Ag | Exhaust gas purification system for the exhaust gas of a diesel engine |
| US7052532B1 (en) * | 2000-03-09 | 2006-05-30 | 3M Innovative Properties Company | High temperature nanofilter, system and method |
| US6776814B2 (en) * | 2000-03-09 | 2004-08-17 | Fleetguard, Inc. | Dual section exhaust aftertreatment filter and method |
| US6669913B1 (en) * | 2000-03-09 | 2003-12-30 | Fleetguard, Inc. | Combination catalytic converter and filter |
| US7211226B2 (en) * | 2000-03-09 | 2007-05-01 | Fleetgaurd, Inc. | Catalyst and filter combination |
| US6604604B1 (en) * | 2000-09-20 | 2003-08-12 | Fleetguard, Inc. | Catalytic muffler and method |
| US6722123B2 (en) * | 2001-10-17 | 2004-04-20 | Fleetguard, Inc. | Exhaust aftertreatment device, including chemical mixing and acoustic effects |
| US6601385B2 (en) * | 2001-10-17 | 2003-08-05 | Fleetguard, Inc. | Impactor for selective catalytic reduction system |
| US6449947B1 (en) * | 2001-10-17 | 2002-09-17 | Fleetguard, Inc. | Low pressure injection and turbulent mixing in selective catalytic reduction system |
| US6712869B2 (en) * | 2002-02-27 | 2004-03-30 | Fleetguard, Inc. | Exhaust aftertreatment device with flow diffuser |
-
2007
- 2007-09-04 US US11/849,488 patent/US20090056319A1/en not_active Abandoned
-
2008
- 2008-09-03 GB GB0816066A patent/GB2452613A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353208A (en) * | 1977-07-28 | 1982-10-12 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Exhaust gas purification apparatus for an internal combustion engine of motor vehicles |
| EP1676986A1 (en) * | 2003-09-30 | 2006-07-05 | Nissan Diesel Motor Co., Ltd. | Exhaust gas purification device and exhaust gas purification method for engine |
| WO2006108566A1 (en) * | 2005-04-15 | 2006-10-19 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method and device for the dosed provision of a reducing agent, especially a solid reducing agent, for exhaust gas systems |
| US20070051097A1 (en) * | 2005-09-02 | 2007-03-08 | Emitec Gesellschaft Fur Emissionstechnologie Mbh | Method and apparatus for adding a reactant to an exhaust gas from an internal combustion engine |
| US20070193252A1 (en) * | 2006-02-23 | 2007-08-23 | Mckinley Thomas L | Exhaust aftertreatment device with star-plugged turbulator |
| WO2008089956A2 (en) * | 2007-01-22 | 2008-07-31 | Süd-Chemie AG | Device for selective catalytic reduction of nox- in waste gases |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2539239C2 (en) * | 2010-01-18 | 2015-01-20 | Сканиа Св Аб | Device and method to improve vehicle performance |
| US11033858B2 (en) * | 2017-06-16 | 2021-06-15 | Umicore Ag & Co. Kg | Combined soot filter and urea hydrolysis |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0816066D0 (en) | 2008-10-08 |
| US20090056319A1 (en) | 2009-03-05 |
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