US20150108384A1 - Variable exhaust mixing device - Google Patents
Variable exhaust mixing device Download PDFInfo
- Publication number
- US20150108384A1 US20150108384A1 US14/396,164 US201214396164A US2015108384A1 US 20150108384 A1 US20150108384 A1 US 20150108384A1 US 201214396164 A US201214396164 A US 201214396164A US 2015108384 A1 US2015108384 A1 US 2015108384A1
- Authority
- US
- United States
- Prior art keywords
- exhaust
- mixing
- mixing device
- variable
- variable exhaust
- 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.)
- Abandoned
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Images
Classifications
-
- 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
- F01N3/103—Oxidation catalysts for HC and CO only
-
- 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
-
- 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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- 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
- F01N2240/36—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 an exhaust flap
-
- 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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
-
- 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
-
- 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
- Y02T10/40—Engine management systems
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
- Y10T137/0402—Cleaning, repairing, or assembling
- Y10T137/0491—Valve or valve element assembling, disassembling, or replacing
- Y10T137/0525—Butterfly valve
Definitions
- a Diesel Oxidation Catalyst uses a chemical process to break down pollutants from diesel engines in the exhaust stream, turning them into less harmful components.
- the DOC is normally a honeycomb shaped configuration coated in a catalyst designed to trigger a chemical reaction to reduce particulate matter.
- a DOC is an exhaust aftertreatment device for diesel engines and contains palladium and platinum which serve as catalysts to oxidize hydrocarbons and carbon monoxide into carbon dioxide and water.
- dosed fuel may be provided to the DOC to improve DOC performance.
- DOC DOC
- a variable exhaust mixing system includes a butterfly valve positioned in an exhaust stream.
- the butterfly valve is opened more to decrease mixing and closed more to increase mixing.
- the increased mixing provided by the variable exhaust mixing device allows the injection of dosed fuel into the exhaust stream at a lower exhaust flow rate.
- FIG. 1 illustrates a variable exhaust mixing system
- FIG. 2 illustrates the DOC inlet temperature, the Pre-DOC out temperature, the Pre-DOC in temperature, and the engine speed in rpm.
- FIG. 1 illustrates a variable exhaust mixing system 100 .
- FIG. 1 includes a turbocharger 110 , an exhaust stream 120 , a variable exhaust mixing device 130 , a device controller 140 , a dosing valve 150 , dosed fuel 160 , and a Diesel Oxidation Catalyst (DOC) 170 .
- DOC Diesel Oxidation Catalyst
- the exhaust stream 120 downstream of the turbocharger 110 passes through a variable exhaust mixing device 130 that is controlled by a device control 140 .
- the exhaust stream 120 continues to a dosing valve 150 where dosed fuel 160 is provided to the exhaust stream 120 before the exhaust stream 120 enters the DOC 170 .
- variable exhaust mixing device 130 provides better mixing of the dosed fuel into the exhaust flow, which allows significantly improved conversion in the DOC 170 .
- the variable exhaust mixing device is a piece of hardware placed in the exhaust system, downstream of the turbocharger and upstream of the dosing valve, which creates swirl in the exhaust.
- variable exhaust mixing device 130 is a butterfly valve placed in the exhaust stream, which may be commanded to open and close to different positions. This valve improves the mixing of the fuel into the exhaust stream and provides a wider range of engine operation where fuel may be injected. Additionally, the valve is controlled in an embodiment by software provided by the device controller 140 .
- variable exhaust mixing device allows the injection of fuel at low flow.
- FIG. 2 illustrates the DOC inlet temperature 210 , the Pre-DOC out temperature 220 , the Pre-DOC in temperature 230 , and the engine speed in rpm 240 .
- the improved conversion due to the variable exhaust mixing device is shown in FIG. 2 . More specifically, an approximately 90 C additional temperature out of the DOC was achieved under the same conditions when using a mixing device.
- the valve changes orientation based on engine operation. For example, low exhaust flow is provided with more aggressive mixing (the butterfly valve is closed more) which may not be possible at higher flows due to backpressure, for example. Consequently, based on exhaust flow, the valve is controlled to change its orientation to produce greater or lesser mixing.
- the ability to produce variable mixing increases the exhaust flow range in which fuel may be injected.
- the fuel may now be injected over the entire exhaust flow operating range as opposed to not being able to be injected at flows below about 300 kg/hr, for example.
- valves may be employed such as a gate valve or disc valve. Additionally, multiple types of valves may be employed.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
- A Diesel Oxidation Catalyst (DOC) uses a chemical process to break down pollutants from diesel engines in the exhaust stream, turning them into less harmful components. The DOC is normally a honeycomb shaped configuration coated in a catalyst designed to trigger a chemical reaction to reduce particulate matter. More specifically, a DOC is an exhaust aftertreatment device for diesel engines and contains palladium and platinum which serve as catalysts to oxidize hydrocarbons and carbon monoxide into carbon dioxide and water.
- Additionally, dosed fuel may be provided to the DOC to improve DOC performance. However, there are limitations on how much fuel can be dosed depending on exhaust flow and temperature
- A variable exhaust mixing system is provided that includes a butterfly valve positioned in an exhaust stream. The butterfly valve is opened more to decrease mixing and closed more to increase mixing. The increased mixing provided by the variable exhaust mixing device allows the injection of dosed fuel into the exhaust stream at a lower exhaust flow rate.
-
FIG. 1 illustrates a variable exhaust mixing system. -
FIG. 2 illustrates the DOC inlet temperature, the Pre-DOC out temperature, the Pre-DOC in temperature, and the engine speed in rpm. -
FIG. 1 illustrates a variableexhaust mixing system 100.FIG. 1 includes aturbocharger 110, anexhaust stream 120, a variableexhaust mixing device 130, adevice controller 140, adosing valve 150, dosedfuel 160, and a Diesel Oxidation Catalyst (DOC) 170. - In operation, the
exhaust stream 120 downstream of theturbocharger 110 passes through a variableexhaust mixing device 130 that is controlled by adevice control 140. Theexhaust stream 120 continues to adosing valve 150 where dosedfuel 160 is provided to theexhaust stream 120 before theexhaust stream 120 enters theDOC 170. - During operation, the variable
exhaust mixing device 130 provides better mixing of the dosed fuel into the exhaust flow, which allows significantly improved conversion in theDOC 170. As shown inFIG. 1 , the variable exhaust mixing device is a piece of hardware placed in the exhaust system, downstream of the turbocharger and upstream of the dosing valve, which creates swirl in the exhaust. - In one embodiment, the variable
exhaust mixing device 130 is a butterfly valve placed in the exhaust stream, which may be commanded to open and close to different positions. This valve improves the mixing of the fuel into the exhaust stream and provides a wider range of engine operation where fuel may be injected. Additionally, the valve is controlled in an embodiment by software provided by thedevice controller 140. - Additionally, the variable exhaust mixing device allows the injection of fuel at low flow.
-
FIG. 2 illustrates theDOC inlet temperature 210, the Pre-DOC outtemperature 220, the Pre-DOC intemperature 230, and the engine speed inrpm 240. The improved conversion due to the variable exhaust mixing device is shown inFIG. 2 . More specifically, an approximately 90 C additional temperature out of the DOC was achieved under the same conditions when using a mixing device. - With regard to the software control of the valve, in an embodiment, the valve changes orientation based on engine operation. For example, low exhaust flow is provided with more aggressive mixing (the butterfly valve is closed more) which may not be possible at higher flows due to backpressure, for example. Consequently, based on exhaust flow, the valve is controlled to change its orientation to produce greater or lesser mixing.
- Additionally, the ability to produce variable mixing increases the exhaust flow range in which fuel may be injected. For example, the fuel may now be injected over the entire exhaust flow operating range as opposed to not being able to be injected at flows below about 300 kg/hr, for example.
- Additionally, although a butterfly valve has been discussed above, other types of valves may be employed such as a gate valve or disc valve. Additionally, multiple types of valves may be employed.
Claims (12)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2012/035076 WO2013162555A1 (en) | 2012-04-26 | 2012-04-26 | Variable exhaust mixing device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150108384A1 true US20150108384A1 (en) | 2015-04-23 |
Family
ID=49483659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/396,164 Abandoned US20150108384A1 (en) | 2012-04-26 | 2012-04-26 | Variable exhaust mixing device |
Country Status (2)
Country | Link |
---|---|
US (1) | US20150108384A1 (en) |
WO (1) | WO2013162555A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10876482B2 (en) * | 2015-09-04 | 2020-12-29 | Innio Jenbacher Gmbh & Co Og | Internal combustion engine |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6109027A (en) * | 1998-02-17 | 2000-08-29 | Diesel Engine Retarders, Inc. | Exhaust restriction device |
US20050045407A1 (en) * | 2003-08-28 | 2005-03-03 | Bulicz Tytus R. | Clean, low-pressure EGR in a turbocharged engine by back-pressure control |
US20060130459A1 (en) * | 2004-12-21 | 2006-06-22 | Detroit Diesel Corporation | Method and system for controlling temperatures of exhaust gases emitted from internal combustion engine to facilitate regeneration of a particulate filter |
US20100269489A1 (en) * | 2009-04-22 | 2010-10-28 | Gm Global Technology Operations, Inc. | Oxidation catalyst outlet temperature correction systems and methods |
US20110061372A1 (en) * | 2009-09-14 | 2011-03-17 | Gm Global Technology Operations, Inc. | Intrusive scr efficency testing systems and methods for vehicles with low temperature exhaust gas |
US20110252765A1 (en) * | 2010-04-14 | 2011-10-20 | International Engine Intellectual Property Company , Llc | Exhaust throttle valve system and method for diesel particulate filter regeneration |
US20110289914A1 (en) * | 2010-05-28 | 2011-12-01 | Caterpillar Inc. | Upstream egr restriction |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008036884A1 (en) * | 2008-08-07 | 2010-02-11 | Daimler Ag | Method for operating an emission control system with an SCR catalytic converter |
-
2012
- 2012-04-26 US US14/396,164 patent/US20150108384A1/en not_active Abandoned
- 2012-04-26 WO PCT/US2012/035076 patent/WO2013162555A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6109027A (en) * | 1998-02-17 | 2000-08-29 | Diesel Engine Retarders, Inc. | Exhaust restriction device |
US20050045407A1 (en) * | 2003-08-28 | 2005-03-03 | Bulicz Tytus R. | Clean, low-pressure EGR in a turbocharged engine by back-pressure control |
US20060130459A1 (en) * | 2004-12-21 | 2006-06-22 | Detroit Diesel Corporation | Method and system for controlling temperatures of exhaust gases emitted from internal combustion engine to facilitate regeneration of a particulate filter |
US20100269489A1 (en) * | 2009-04-22 | 2010-10-28 | Gm Global Technology Operations, Inc. | Oxidation catalyst outlet temperature correction systems and methods |
US20110061372A1 (en) * | 2009-09-14 | 2011-03-17 | Gm Global Technology Operations, Inc. | Intrusive scr efficency testing systems and methods for vehicles with low temperature exhaust gas |
US20110252765A1 (en) * | 2010-04-14 | 2011-10-20 | International Engine Intellectual Property Company , Llc | Exhaust throttle valve system and method for diesel particulate filter regeneration |
US20110289914A1 (en) * | 2010-05-28 | 2011-12-01 | Caterpillar Inc. | Upstream egr restriction |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10876482B2 (en) * | 2015-09-04 | 2020-12-29 | Innio Jenbacher Gmbh & Co Og | Internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
WO2013162555A1 (en) | 2013-10-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTERNATIONAL ENGINE INTELLECTUAL COMPANY, LLC., I Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:REEVES, CRAIG ALAN;REEL/FRAME:034005/0057 Effective date: 20120320 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK N.A., AS COLLATERAL AGENT, NEW Free format text: SECURITY AGREEMENT;ASSIGNORS:NAVISTAR INTERNATIONAL CORPORATION;INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, LLC;INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC;REEL/FRAME:036616/0243 Effective date: 20150807 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044780/0456 Effective date: 20171106 Owner name: INTERNATIONAL TRUCK INTELLECTUAL PROPERTY COMPANY, Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044780/0456 Effective date: 20171106 Owner name: NAVISTAR INTERNATIONAL CORPORATION, ILLINOIS Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:044780/0456 Effective date: 20171106 |