WO2011130220A1 - Exhaust throttle valve system and method for diesel particulate filter regeneration - Google Patents
Exhaust throttle valve system and method for diesel particulate filter regeneration Download PDFInfo
- Publication number
- WO2011130220A1 WO2011130220A1 PCT/US2011/032047 US2011032047W WO2011130220A1 WO 2011130220 A1 WO2011130220 A1 WO 2011130220A1 US 2011032047 W US2011032047 W US 2011032047W WO 2011130220 A1 WO2011130220 A1 WO 2011130220A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- throttle valve
- exhaust throttle
- engine
- aftertreatment system
- exhaust
- Prior art date
Links
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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0235—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using exhaust gas throttling means
-
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
- F02D9/06—Exhaust brakes
-
- 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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/30—Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow
-
- 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
Definitions
- Embodiments described herein relate to a system and method for heating exhaust gas. More specifically, embodiments described herein relate to a system and method for heating exhaust gas to create a regeneration event at a diesel particulate filter.
- Exhaust gas aftertreatment systems in diesel vehicles are located downstream of the engine for treating exhaust gases emitted from the engine.
- the aftertreatment systems typically include a diesel oxidation catalyst, a diesel particulate filter, among other components. Particulate matter from the exhaust gas accumulates on the diesel particulate filter, and if left unchecked, can create a back pressure in the aftertreatment system.
- a regeneration event is the periodic oxidation of the collected particulate matter in the aftertreatment system during routine diesel engine operation.
- the diesel particulate filter of the exhaust system experiences a build-up of particulate matter, the particulate matter is oxidized to "regenerate" the filter.
- Regeneration is typically initiated by increasing engine load and activating a post- injection of diesel fuel into the exhaust stream. This post-injection provides sufficient heat to oxidize the trapped particulate matter within the diesel particulate filter.
- An exhaust gas aftertreatment system for a vehicle having an engine includes a fluid passageway extending from the engine to an ambient for fluidly communicating exhaust gas.
- a diesel particulate filter is disposed on the fluid passageway downstream of the engine.
- At least one exhaust throttle valve is located downstream of the engine on the fluid passageway. When the exhaust throttle valve is actuated, the valve obstructs the flow of exhaust gas and increases the temperature of the exhaust gas. The heated exhaust gas causes regeneration at the diesel particulate filter.
- a method of regenerating an exhaust aftertreatment system of an engine having a diesel particulate filter includes providing a fluid passageway from the engine to an ambient. The method also includes the step of providing an exhaust throttle valve downstream of the engine on the fluid passageway, and actuating the exhaust throttle valve to at least partially obstruct the flow of exhaust gas through the fluid passageway. Further, the method includes compressing and heating the exhaust gas upstream of the exhaust throttle valve, and delivering the heated exhaust gas to the diesel particulate filter to initiate regeneration.
- An exhaust gas aftertreatment system for a vehicle having an engine includes an engine control module associated with the engine, a fluid passageway extending from the engine to an ambient for fluidly communicating exhaust gas, and a diesel particulate filter disposed on the fluid passageway downstream of the engine.
- the system also includes at least one exhaust throttle valve located downstream of the diesel particulate filter on the fluid passageway, and an actuator for actuating the at least one exhaust throttle valve.
- At least a temperature sensor for sensing the temperature at the aftertreatment system, or a back pressure sensor for sensing the pressure at the aftertreatment system communicate the temperature or the back pressure, or both, to an engine control module on the engine.
- FIG. 1 is a schematic of an exhaust aftertreatment system having an exhaust throttle valve located upstream of the diesel particulate filter.
- FIG. 2 is a schematic of the exhaust aftertreatment system having the exhaust throttle valve located downstream of the diesel particulate filter.
- FIG. 3 is a schematic of the exhaust aftertreatment system having exhaust throttle valves located both upstream and downstream of the diesel particulate filter.
- an exhaust gas aftertreatment system for a vehicle is indicated generally at 10, and has an exhaust pipe assembly 12 extending from an engine 14 to an outlet 16, such as the outlet to an ambient 18.
- the exhaust pipe assembly 12 forms a fluid passageway 20 for the flow of exhaust gas F from the engine 14 to the ambient 18.
- the downstream direction of exhaust gas flow F is from engine 14 to outlet 16.
- a first portion 22 of the exhaust pipe assembly 12 extends from the engine 14 to a diesel particulate filter (DPF) 24.
- the DPF 24 is a filter constructed from a very high temperature resistant material. The DPF 24 catches and holds particulate matter entrained within the exhaust gases discharged into the exhaust aftertreatment system 10.
- the DPF 24 is periodically regenerated to limit increases in exhaust aftertreatment system 10 back pressure and to maintain engine 14 efficiency.
- a second portion 26 of the exhaust pipe assembly 12 extends from the DPF 24 to the outlet 16.
- An exhaust manifold 28 may be located upstream of the first portion 22 of the exhaust pipe assembly 12.
- Other components may be disposed on the aftertreatment system 10, such as a diesel oxidation catalyst (not shown) which may be located upstream of the DPF 24.
- At least one exhaust throttle valve 30A is disposed in fluid communication with and downstream from the engine 14 on the fluid passageway 20. When actuated, the exhaust throttle valve 30A obstructs the flow of exhaust gas F through the fluid passageway 20.
- the exhaust throttle valve 30A may be a butterfly valve 32A, however other types of valves are possible.
- the butterfly valve 32A regulates the flow F through the fluid passageway 20 with an actuator 34A, which rotates the butterfly valve 32A to be either parallel with the flow F, which is an open position, or perpendicular with the flow F, which is a closed position, or in any position therebetween.
- the butterfly valve 32A obstructs the flow of exhaust gas F through the exhaust passageway 20.
- the orifice at the butterfly valve 32A In the parallel-open position, the orifice at the butterfly valve 32A has a maximum orifice area with the least flow obstruction, and in the perpendicular-closed position, the orifice at the butterfly valve has a minimum orifice area with the most flow obstruction.
- the exhaust throttle valve 30A may sealingly prevent the fluid communication through the second portion 26 of the exhaust pipe assembly 12.
- the actuator 34A may be either hydraulically or electrically driven.
- An engine control module (ECM) 36 controls the exhaust throttle valve 30A through the actuator 34A depending on pressure and temperature conditions in the aftertreatment system 10.
- a pressure sensor communicates the pressure in the aftertreatment system 10, such as at the exhaust manifold 28 or the DPF 24, and communicates the back pressure to the ECM 36. It is possible that the back pressure can be a change in pressure between two locations on the aftertreatment system 10, such as upstream and downstream of the DPF 24.
- a temperature sensor 38 senses the temperature at the DPF 24, the exhaust manifold 28, or anywhere between cylinders 44 and the outlet 16, and communicates the temperature to the ECM 36. It is possible that the temperature can be a change in temperature between two locations on the aftertreatment system 10, such as upstream and downstream of the DPF 24.
- the ECM 36 also monitors fuel delivery and engine speed to maintain an optimized engine speed/loading and exhaust gas temperature.
- the DPF may be clogged with particulate matter.
- a predetermined amount of exhaust back pressure is sensed by an exhaust pressure sensor 40, or when a predetermined temperature is sensed at the DPF 24, at the exhaust manifold 28, or anywhere else on the aftertreatment system 10, it is communicated to the ECM 36, which actuates the exhaust throttle valve 30A.
- the pressure and temperature values are communicated to the ECM 36, and the ECM commands the actuation of the exhaust throttle valve 3 OA to partially or completely close.
- the butterfly valve 32A closes about 80 - 96% of the orifice in the fluid passageway 20.
- the exhaust throttle valve 30A is open until it is actuated by the actuator
- the exhaust throttle valve 30B is the same apparatus as described with respect to exhaust throttle valve 3 OA, operates in the same manner as exhaust throttle valve 3 OA, and is part of the same aftertreatment system 10 as the exhaust throttle valve 30A. The difference between the exhaust throttle valves 30A and 30B is the location on the aftertreatment system 10.
- the exhaust aftertreatment system 10 can include two exhaust throttle valves 30C, 30D having two actuators 34C, 34D.
- the exhaust throttle valves 30C, 30D are the same apparatuses as described with respect to exhaust throttle valves 30A and 30B, they operate in the same manner as exhaust throttle valves 30A and 30B, and they are part of the same aftertreatment system 10 as the exhaust throttle valves 3 OA and 30B.
- the difference between the exhaust throttle valves 30A-30D are the locations on the aftertreatment system 10.
- the first exhaust throttle valve 30C is disposed in upstream fluid communication from the DPF 24, and in downstream fluid communication from the engine 14 and exhaust manifold 28 on the fluid passageway 20.
- the second exhaust throttle valve 30D is disposed in downstream fluid communication from the DPF 24 on the fluid passageway 20. Similar to exhaust throttle valves 30A and 30B, the exhaust throttle valves 30C and 30D may be butterfly valves 32C, 32D, however other types of valves are possible.
- the exhaust throttle valves 30C, 30D can be actuated at the same time, or at different times, and with the same amount of passageway 20 obstruction, or with differing amounts of passageway obstruction.
- the exhaust throttle valves 30C, 30D are actuated with actuators 34C, 34D to optimize the pressure and the temperature between the valves and at the DPF 24 to effect regeneration of the DPF 24.
- the actuation of the exhaust throttle valve 30A-30D, resulting in the regulation of the amount of exhaust gas flow F through the exhaust throttle valve, can be optimized for desired temperatures, pressures and engine loading.
- the ECM 36 can monitor fuel delivery to the cylinders 44 and the engine speed/loading so that the engine speed/loading and exhaust gas temperature can be optimized for desired temperatures at the DPF 24 or anywhere on the aftertreatment system 10.
- the exhaust aftertreatment system 10 may include a variable geometry turbocharger (not shown) to restrict exhaust gas flow F.
- the aftertreatment system 10 having exhaust throttle valves 30A-30D can be used on a vehicle having an exhaust brake (not shown) on the engine 14.
- the aftertreatment system 10 having at least one exhaust throttle valve
- the vehicle can run on a "stop and drive" basis, where the engine 14 can be run at a lower speed and lower loading, while at the same time, providing exhaust gas flow F with a sufficiently high temperature to initiate the regeneration at the DPF 24.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11769410A EP2558692A1 (en) | 2010-04-14 | 2011-04-12 | Exhaust throttle valve system and method for diesel particulate filter regeneration |
CN2011800291552A CN102939443A (en) | 2010-04-14 | 2011-04-12 | Exhaust throttle valve system and method for diesel particulate filter regeneration |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/759,733 US20110252765A1 (en) | 2010-04-14 | 2010-04-14 | Exhaust throttle valve system and method for diesel particulate filter regeneration |
US12/759,733 | 2010-04-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011130220A1 true WO2011130220A1 (en) | 2011-10-20 |
Family
ID=44787068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2011/032047 WO2011130220A1 (en) | 2010-04-14 | 2011-04-12 | Exhaust throttle valve system and method for diesel particulate filter regeneration |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110252765A1 (en) |
EP (1) | EP2558692A1 (en) |
CN (1) | CN102939443A (en) |
WO (1) | WO2011130220A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110289902A1 (en) * | 2010-05-27 | 2011-12-01 | International Engine Intellectual Property Company , Llc | Method for operating an exhaust valve for diesel particulate filter regeneration |
CN103946507B (en) | 2011-10-26 | 2017-07-21 | 博夏特汽车测试服务有限公司 | Overheat/overpressure safety device for diesel particulate filter |
JP2013108444A (en) * | 2011-11-22 | 2013-06-06 | Ud Trucks Corp | Control system for dpf regeneration by exhaust pipe injection, and regeneration method |
DE102012204756A1 (en) * | 2012-03-26 | 2013-09-26 | Robert Bosch Gmbh | Method and device for fault monitoring in an exhaust gas recirculation |
WO2013162555A1 (en) * | 2012-04-26 | 2013-10-31 | International Engine Intellectual Property Company, Llc | Variable exhaust mixing device |
US9212587B2 (en) | 2014-02-25 | 2015-12-15 | Cummins Inc. | Exhaust throttle control for aftertreatment system thermal management |
US9074549B1 (en) * | 2014-03-24 | 2015-07-07 | Cummins Inc. | Aftertreatment thermal management strategies for internal combustion engines having multiple cylinder banks |
DE102018106588A1 (en) * | 2018-03-21 | 2019-09-26 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Exhaust system and method for operating an exhaust system |
EP3784884A1 (en) * | 2018-04-27 | 2021-03-03 | Carrier Corporation | Exhaust back pressure and temperature monitoring transport refrigeration unit |
US11867112B1 (en) | 2023-03-07 | 2024-01-09 | International Engine Intellectual Property Company, Llc | Logic for improved delta pressure based soot estimation on low restriction particulate filters |
US11994056B1 (en) | 2023-03-07 | 2024-05-28 | International Engine Intellectual Property Company, Llc | Logic for improved delta pressure based soot estimation on low restriction particulate filters |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4835963A (en) * | 1986-08-28 | 1989-06-06 | Allied-Signal Inc. | Diesel engine particulate trap regeneration system |
US4875336A (en) * | 1988-01-12 | 1989-10-24 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas emission control device for diesel engine |
US5050376A (en) * | 1990-02-08 | 1991-09-24 | Allied-Signal Inc. | Control system for diesel particulate trap regeneration system |
US20050217255A1 (en) * | 2004-03-30 | 2005-10-06 | Isuzu Motors Limited | Device for purifying the exhaust gases of diesel engines |
US7021047B2 (en) * | 2004-07-23 | 2006-04-04 | General Motors Corporation | Diesel exhaust aftertreatment device regeneration system |
US20090193790A1 (en) * | 2008-02-04 | 2009-08-06 | Man Nutzfahrzeuge Oesterreich Ag | Method For The Regeneration Of A Particle Filter Installed In The Exhaust Gas Train Of A Vehicular Diesel Engine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4453602B2 (en) * | 2005-05-18 | 2010-04-21 | トヨタ自動車株式会社 | Exhaust gas purification system for internal combustion engine |
US7877985B2 (en) * | 2005-05-18 | 2011-02-01 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification system for internal combustion engine |
EP2066880A1 (en) * | 2006-09-19 | 2009-06-10 | Industriell Plåtproduktion Ab | Exhaust gas system |
-
2010
- 2010-04-14 US US12/759,733 patent/US20110252765A1/en not_active Abandoned
-
2011
- 2011-04-12 WO PCT/US2011/032047 patent/WO2011130220A1/en active Application Filing
- 2011-04-12 EP EP11769410A patent/EP2558692A1/en not_active Withdrawn
- 2011-04-12 CN CN2011800291552A patent/CN102939443A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4835963A (en) * | 1986-08-28 | 1989-06-06 | Allied-Signal Inc. | Diesel engine particulate trap regeneration system |
US4875336A (en) * | 1988-01-12 | 1989-10-24 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas emission control device for diesel engine |
US5050376A (en) * | 1990-02-08 | 1991-09-24 | Allied-Signal Inc. | Control system for diesel particulate trap regeneration system |
US20050217255A1 (en) * | 2004-03-30 | 2005-10-06 | Isuzu Motors Limited | Device for purifying the exhaust gases of diesel engines |
US7021047B2 (en) * | 2004-07-23 | 2006-04-04 | General Motors Corporation | Diesel exhaust aftertreatment device regeneration system |
US20090193790A1 (en) * | 2008-02-04 | 2009-08-06 | Man Nutzfahrzeuge Oesterreich Ag | Method For The Regeneration Of A Particle Filter Installed In The Exhaust Gas Train Of A Vehicular Diesel Engine |
Also Published As
Publication number | Publication date |
---|---|
CN102939443A (en) | 2013-02-20 |
EP2558692A1 (en) | 2013-02-20 |
US20110252765A1 (en) | 2011-10-20 |
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