US20110072805A1 - Electrically heated diesel oxidation catalyst - Google Patents
Electrically heated diesel oxidation catalyst Download PDFInfo
- Publication number
- US20110072805A1 US20110072805A1 US12/643,374 US64337409A US2011072805A1 US 20110072805 A1 US20110072805 A1 US 20110072805A1 US 64337409 A US64337409 A US 64337409A US 2011072805 A1 US2011072805 A1 US 2011072805A1
- Authority
- US
- United States
- Prior art keywords
- electrode
- substrate
- engine
- oxidation catalyst
- diesel oxidation
- 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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Classifications
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- 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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
-
- 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
- F01N3/027—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 electric or magnetic heating 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
- 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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
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- 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
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
- F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
-
- 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
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
Definitions
- Embodiments described herein relate to a system, method and device for heating exhaust gas. More specifically, embodiments described herein relate to a system, method and device 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, and a diesel particulate filter. 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.
- Exhaust gas is a relatively poor conductor of heat. As such, the loading of the engine must be increased to provide a sufficiently heated exhaust gas to initiate the regeneration downstream at the diesel particulate filter. During low speed and low load operation of the engine, the resulting exhaust gas may not have a sufficiently high temperature to initiate the regeneration.
- 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.
- Disposed downstream of the engine and upstream of the diesel particulate filter is an electric diesel oxidation catalyst having a substrate.
- a first electrode and a second electrode are attached to the electric diesel oxidation catalyst. The first electrode selectively delivers current through the catalyst substrate to the second electrode to generate heat at the catalyst substrate.
- a method of regenerating an exhaust aftertreatment system of an engine having a diesel particulate filter includes the steps of providing a fluid passageway from the engine to an ambient, providing a substrate upstream of the diesel particulate filter, and heating the substrate electrically.
- the method of regeneration also includes the steps of heating the exhaust gas flowing through the heated substrate, and delivering the heated exhaust gas to the diesel particulate filter to initiate regeneration.
- An electric diesel oxidation catalyst for an exhaust aftertreatment system of an engine includes a housing that substantially encloses a substrate.
- the housing has an inlet and an outlet configured for permitting a flow of exhaust gas through the housing.
- a first electrode extends through the housing and is configured for providing an electric current to the substrate.
- a second electrode extends from the housing and is configured for receiving the electric current from the substrate.
- FIG. 1 is a schematic of an exhaust aftertreatment system having an electric diesel oxidation catalyst located downstream of an engine.
- FIG. 2 is a schematic indicating the direction of flow of exhaust gas through the electric diesel oxidation catalyst.
- FIG. 3 is a section view of the electric diesel oxidation catalyst taken along line A-A of FIG. 2 .
- an exhaust gas aftertreatment system 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 .
- a first portion 22 of the exhaust pipe assembly 12 extends from the engine 14 to an electric diesel oxidation catalyst (EDOC) 24 .
- a second portion 26 of the exhaust pipe assembly 12 extends from the EDOC 24 to a diesel oxidation catalyst (DOC) 28 , which is upstream of diesel particulate filter (DPF) 30 .
- a third portion 27 of the exhaust pipe 12 assembly extends from the DPF 30 to the outlet 16 .
- Other portions of the exhaust pipe may be disposed between various components on the aftertreatment system 10 , such as between the engine 14 and an exhaust brake 29 , between the exhaust brake and the EDOC 24 , or between the DOC 28 and the DPF 30 .
- the DPF 30 is a filter constructed from a very high temperature resistant material.
- the DPF 30 catches and holds particulate matter entrained within the exhaust gases discharged into the exhaust aftertreatment system 10 .
- the DPF 30 is periodically regenerated to limit increases in exhaust aftertreatment system 10 back pressure and to maintain engine 14 efficiency.
- the DOC 28 is a flow-through device that includes a substrate, typically a ceramic or a metal covered with a catalyst. As the exhaust gases F flow through the DOC 28 , carbon monoxide, gaseous hydrocarbons and liquid hydrocarbon particles (unburned fuel and oil) are oxidized, thereby reducing emissions.
- the EDOC 24 Upstream of the DPF 30 and the DOC 28 is the EDOC 24 .
- the EDOC 24 has a housing 32 that substantially encloses a substrate 34 having a structure that permits the flow of exhaust gas F through the substrate and that is distributed within the cross-section of the EDOC, for example a grid-shape, a swirl-shape, a honeycomb-shape, a circuitous-shape, a mesh-shape, or any other shape.
- the substrate 34 is made of metal, however other highly conductive materials are possible.
- the housing 32 may be generally cylindrical or have any other shape that permits the flow of exhaust gas F from an inlet 36 to an outlet 38 and through the substrate 34 .
- the first portion 22 of the pipe assembly 12 provides the fluid passageway 20 for the flow of exhaust gas F into the EDOC 24 at the inlet 36
- the second portion 26 of the pipe assembly provides the fluid passageway for the flow of exhaust gas F out of the EDOC at the outlet 38 .
- the housing 32 of the EDOC 24 may be metal, however other materials are possible.
- a first electrode 40 is electrically connected to a power source on the vehicle, such as the engine 14 , with a first transmission wire 42 .
- the first electrode 40 extends through the housing of the EDOC 24 , and may extend generally the radius or generally half the width of the EDOC, however other lengths of extension into the EDOC are possible.
- the first electrode 40 contacts the substrate 34 generally at the cross-sectional center C of the EDOC 24 and the substrate.
- An isolator sleeve 44 is disposed about the first electrode 40 to prevent the contact of the first electrode with the housing 32 of the EDOC 24 .
- the isolator sleeve 44 co-extends with the first electrode 40 less than the entire length of the first electrode 40 so that a portion of the first electrode is exposed.
- a second electrode 46 extends from the housing 32 of the EDOC 24 and is also electrically connected to the engine 14 with a second transmission wire 48 . While the second electrode 46 extends from the housing, it is also possible that the second electrode 46 may contact the substrate 34 .
- the first electrode 40 does not contact the second electrode 46 , but instead the electrodes are spaced from each other and separated by the substrate 34 within the EDOC 24 .
- the electrodes 40 , 46 may also be spaced from each other a distance D along the length of the EDOC 24 .
- the first electrode 40 delivers current from the engine 14 through the substrate 34 to the second electrode 48 . It is possible that the selective introduction of current into the EDOC 24 can be at the activation of a user or an automatic activation, such as by an engine control module.
- the aftertreatment system 10 of FIG. 1 has the EDOC 24 located upstream of the DOC 28 , it is possible that if the EDOC 24 achieves a sufficient exhaust gas temperature, that the aftertreatment system may include only the EDOC with no downstream DOC. Further, it is possible that more than one EDOC 24 can be used to increase the exhaust gas temperature.
- the DPF 30 on the aftertreatment system 10 can be regenerated without having to increase the loading on the engine 14 , which allows regeneration at low engine speed and low engine loading.
Abstract
Description
- Embodiments described herein relate to a system, method and device for heating exhaust gas. More specifically, embodiments described herein relate to a system, method and device 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, and a diesel particulate filter. 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. When 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.
- Exhaust gas is a relatively poor conductor of heat. As such, the loading of the engine must be increased to provide a sufficiently heated exhaust gas to initiate the regeneration downstream at the diesel particulate filter. During low speed and low load operation of the engine, the resulting exhaust gas may not have a sufficiently high temperature to initiate the regeneration.
- 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. Disposed downstream of the engine and upstream of the diesel particulate filter is an electric diesel oxidation catalyst having a substrate. A first electrode and a second electrode are attached to the electric diesel oxidation catalyst. The first electrode selectively delivers current through the catalyst substrate to the second electrode to generate heat at the catalyst substrate.
- A method of regenerating an exhaust aftertreatment system of an engine having a diesel particulate filter includes the steps of providing a fluid passageway from the engine to an ambient, providing a substrate upstream of the diesel particulate filter, and heating the substrate electrically. The method of regeneration also includes the steps of heating the exhaust gas flowing through the heated substrate, and delivering the heated exhaust gas to the diesel particulate filter to initiate regeneration.
- An electric diesel oxidation catalyst for an exhaust aftertreatment system of an engine includes a housing that substantially encloses a substrate. The housing has an inlet and an outlet configured for permitting a flow of exhaust gas through the housing. A first electrode extends through the housing and is configured for providing an electric current to the substrate. A second electrode extends from the housing and is configured for receiving the electric current from the substrate.
-
FIG. 1 is a schematic of an exhaust aftertreatment system having an electric diesel oxidation catalyst located downstream of an engine. -
FIG. 2 is a schematic indicating the direction of flow of exhaust gas through the electric diesel oxidation catalyst. -
FIG. 3 is a section view of the electric diesel oxidation catalyst taken along line A-A ofFIG. 2 . - Referring to
FIGS. 1-3 , an exhaust gas aftertreatment system is indicated generally at 10, and has anexhaust pipe assembly 12 extending from anengine 14 to anoutlet 16, such as the outlet to anambient 18. Theexhaust pipe assembly 12 forms afluid passageway 20 for the flow of exhaust gas F from theengine 14 to theambient 18. - A
first portion 22 of theexhaust pipe assembly 12 extends from theengine 14 to an electric diesel oxidation catalyst (EDOC) 24. Asecond portion 26 of theexhaust pipe assembly 12 extends from the EDOC 24 to a diesel oxidation catalyst (DOC) 28, which is upstream of diesel particulate filter (DPF) 30. Athird portion 27 of theexhaust pipe 12 assembly extends from theDPF 30 to theoutlet 16. Other portions of the exhaust pipe may be disposed between various components on theaftertreatment system 10, such as between theengine 14 and anexhaust brake 29, between the exhaust brake and the EDOC 24, or between theDOC 28 and theDPF 30. - The
DPF 30 is a filter constructed from a very high temperature resistant material. TheDPF 30 catches and holds particulate matter entrained within the exhaust gases discharged into theexhaust aftertreatment system 10. TheDPF 30 is periodically regenerated to limit increases inexhaust aftertreatment system 10 back pressure and to maintainengine 14 efficiency. - The
DOC 28 is a flow-through device that includes a substrate, typically a ceramic or a metal covered with a catalyst. As the exhaust gases F flow through theDOC 28, carbon monoxide, gaseous hydrocarbons and liquid hydrocarbon particles (unburned fuel and oil) are oxidized, thereby reducing emissions. - Upstream of the
DPF 30 and theDOC 28 is the EDOC 24. The EDOC 24 has ahousing 32 that substantially encloses asubstrate 34 having a structure that permits the flow of exhaust gas F through the substrate and that is distributed within the cross-section of the EDOC, for example a grid-shape, a swirl-shape, a honeycomb-shape, a circuitous-shape, a mesh-shape, or any other shape. Thesubstrate 34 is made of metal, however other highly conductive materials are possible. - The
housing 32 may be generally cylindrical or have any other shape that permits the flow of exhaust gas F from aninlet 36 to anoutlet 38 and through thesubstrate 34. Thefirst portion 22 of thepipe assembly 12 provides thefluid passageway 20 for the flow of exhaust gas F into the EDOC 24 at theinlet 36, and thesecond portion 26 of the pipe assembly provides the fluid passageway for the flow of exhaust gas F out of the EDOC at theoutlet 38. Thehousing 32 of the EDOC 24 may be metal, however other materials are possible. - A
first electrode 40 is electrically connected to a power source on the vehicle, such as theengine 14, with afirst transmission wire 42. Thefirst electrode 40 extends through the housing of theEDOC 24, and may extend generally the radius or generally half the width of the EDOC, however other lengths of extension into the EDOC are possible. Thefirst electrode 40 contacts thesubstrate 34 generally at the cross-sectional center C of the EDOC 24 and the substrate. Anisolator sleeve 44 is disposed about thefirst electrode 40 to prevent the contact of the first electrode with thehousing 32 of the EDOC 24. The isolator sleeve 44 co-extends with thefirst electrode 40 less than the entire length of thefirst electrode 40 so that a portion of the first electrode is exposed. When current is run to thefirst electrode 40, the current is isolated from thehousing 32 and the current is directed to the general cross-sectional center C of the EDOC 24. - A
second electrode 46 extends from thehousing 32 of the EDOC 24 and is also electrically connected to theengine 14 with asecond transmission wire 48. While thesecond electrode 46 extends from the housing, it is also possible that thesecond electrode 46 may contact thesubstrate 34. - The
first electrode 40 does not contact thesecond electrode 46, but instead the electrodes are spaced from each other and separated by thesubstrate 34 within the EDOC 24. Theelectrodes first electrode 40 delivers current from theengine 14 through thesubstrate 34 to thesecond electrode 48. It is possible that the selective introduction of current into the EDOC 24 can be at the activation of a user or an automatic activation, such as by an engine control module. - When the current flows from the
first electrode 40, through thesubstrate 34, and to thesecond electrode 48, heat is created at the substrate. When current is delivered to the general cross-sectional center C of thesubstrate 34, the heat created is generally uniform across thesubstrate 34. The exhaust gases F that flow through the EDOC 24 are heated by thesubstrate 34 and thehousing 32, and the heated exhaust gases flow to theDOC 28 and to theDPF 30. At theDPF 30, the heated exhaust gases F provide sufficient heat to initiate regeneration of the DPF. - While the
aftertreatment system 10 ofFIG. 1 has the EDOC 24 located upstream of theDOC 28, it is possible that if the EDOC 24 achieves a sufficient exhaust gas temperature, that the aftertreatment system may include only the EDOC with no downstream DOC. Further, it is possible that more than one EDOC 24 can be used to increase the exhaust gas temperature. - By electrically heating the
EDOC 24, theDPF 30 on theaftertreatment system 10 can be regenerated without having to increase the loading on theengine 14, which allows regeneration at low engine speed and low engine loading.
Claims (20)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/643,374 US20110072805A1 (en) | 2009-09-25 | 2009-12-21 | Electrically heated diesel oxidation catalyst |
PCT/US2010/050183 WO2011038218A1 (en) | 2009-09-25 | 2010-09-24 | Electrically heated diesel oxidation catalyst |
EP10819526.4A EP2480764A4 (en) | 2009-09-25 | 2010-09-24 | Electrically heated diesel oxidation catalyst |
CN201080053906XA CN102639827A (en) | 2009-09-25 | 2010-09-24 | Electrically heated diesel oxidation catalyst |
BR112012007435A BR112012007435A2 (en) | 2009-09-25 | 2010-09-24 | electrically heated diesel oxidation catalyst |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24601209P | 2009-09-25 | 2009-09-25 | |
US12/643,374 US20110072805A1 (en) | 2009-09-25 | 2009-12-21 | Electrically heated diesel oxidation catalyst |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110072805A1 true US20110072805A1 (en) | 2011-03-31 |
Family
ID=43778766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/643,374 Abandoned US20110072805A1 (en) | 2009-09-25 | 2009-12-21 | Electrically heated diesel oxidation catalyst |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110072805A1 (en) |
EP (1) | EP2480764A4 (en) |
CN (1) | CN102639827A (en) |
BR (1) | BR112012007435A2 (en) |
WO (1) | WO2011038218A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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US4485621A (en) * | 1983-01-07 | 1984-12-04 | Cummins Engine Company, Inc. | System and method for reducing particulate emissions from internal combustion engines |
US4686827A (en) * | 1983-02-03 | 1987-08-18 | Ford Motor Company | Filtration system for diesel engine exhaust-II |
US5319929A (en) * | 1988-05-20 | 1994-06-14 | W. R. Grace & Co.-Conn. | Catalytic converter system |
US5582805A (en) * | 1992-12-21 | 1996-12-10 | Toyota Jidosha Kabushiki Kaisha | Electrically heated catalytic apparatus |
US5711149A (en) * | 1995-05-18 | 1998-01-27 | Toyota Jidosha Kabushiki Kaisha | Device for purifying the exhaust gas of a diesel engine |
US5746989A (en) * | 1995-08-14 | 1998-05-05 | Toyota Jidosha Kabushiki Kaisha | Method for purifying exhaust gas of a diesel engine |
US5800789A (en) * | 1995-04-18 | 1998-09-01 | Toyota Jidosha Kabushiki Kaisha | Electrically heated catalyst achieving smaller power consumption |
US5800790A (en) * | 1995-09-25 | 1998-09-01 | Sintokogio, Ltd. | Filter for treatment of carbon-based particles in exhaust gas and a device for said treatment using said filter |
US5902557A (en) * | 1995-05-30 | 1999-05-11 | Nippon Steel Corporation | Device for purifying exhaust gas of internal combustion engine |
US5966931A (en) * | 1996-09-18 | 1999-10-19 | Toyota Jidosha Kabushiki Kaisha | Power supply control system for an electrically heated catalytic converter |
US6060699A (en) * | 1996-05-14 | 2000-05-09 | Toyota Jidosha Kabushiki Kaisha | Electrode structure for high temperature heated body |
US20010023589A1 (en) * | 2000-01-27 | 2001-09-27 | Yasuki Tamura | Plasma type exhaust gas cleaning apparatus |
US6381955B1 (en) * | 2001-02-07 | 2002-05-07 | Visteon Global Technologies, Inc. | Method and system for providing electricity from an integrated starter-alternator to an electrically heated catalyst |
US20050142507A1 (en) * | 2000-08-09 | 2005-06-30 | Calsonic Kansei Corporation | Hydrogen combustion heater |
US7104051B2 (en) * | 2002-11-28 | 2006-09-12 | Honda Motor Co., Ltd. | Exhaust gas purification device |
US20100313547A1 (en) * | 2009-06-11 | 2010-12-16 | Gm Global Technology Operations, Inc. | Apparatus and method for regenerating an exhaust filter |
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US5715677A (en) * | 1996-11-13 | 1998-02-10 | The Regents Of The University Of California | Diesel NOx reduction by plasma-regenerated absorbend beds |
JPH11324652A (en) * | 1998-04-09 | 1999-11-26 | Fev Motorentechnik Gmbh & Co Kg | Method for reducing emission of harmful matter from automobile |
DE10130163B4 (en) * | 2000-11-21 | 2012-01-12 | Siemens Ag | Arrangement for reducing carbonaceous particulate emissions from diesel engines |
DE20117659U1 (en) * | 2001-10-29 | 2002-01-10 | Emitec Emissionstechnologie | Open particle filter with heating element |
AU2003273113A1 (en) * | 2003-01-27 | 2004-08-23 | Iljin Electronic Co., Ltd | Fumes reducing device for diesel engines and method of manufacturing the same |
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US7762062B2 (en) * | 2005-01-31 | 2010-07-27 | Caterpillar Inc | Adaptive regeneration system |
-
2009
- 2009-12-21 US US12/643,374 patent/US20110072805A1/en not_active Abandoned
-
2010
- 2010-09-24 BR BR112012007435A patent/BR112012007435A2/en not_active IP Right Cessation
- 2010-09-24 EP EP10819526.4A patent/EP2480764A4/en not_active Withdrawn
- 2010-09-24 CN CN201080053906XA patent/CN102639827A/en active Pending
- 2010-09-24 WO PCT/US2010/050183 patent/WO2011038218A1/en active Application Filing
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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 |
Also Published As
Publication number | Publication date |
---|---|
BR112012007435A2 (en) | 2016-12-13 |
EP2480764A1 (en) | 2012-08-01 |
EP2480764A4 (en) | 2015-06-10 |
WO2011038218A1 (en) | 2011-03-31 |
CN102639827A (en) | 2012-08-15 |
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