[go: up one dir, main page]

WO2008042048A1 - Gestion de la temperature dans un systeme de traitement d'echappement - Google Patents

Gestion de la temperature dans un systeme de traitement d'echappement Download PDF

Info

Publication number
WO2008042048A1
WO2008042048A1 PCT/US2007/017761 US2007017761W WO2008042048A1 WO 2008042048 A1 WO2008042048 A1 WO 2008042048A1 US 2007017761 W US2007017761 W US 2007017761W WO 2008042048 A1 WO2008042048 A1 WO 2008042048A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
exhaust
treatment system
exhaust treatment
power source
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.)
Ceased
Application number
PCT/US2007/017761
Other languages
English (en)
Inventor
Christopher R. Gehrke
Justin W. Mcmenamy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Inc
Original Assignee
Caterpillar Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Caterpillar Inc filed Critical Caterpillar Inc
Priority to DE112007002202T priority Critical patent/DE112007002202T5/de
Publication of WO2008042048A1 publication Critical patent/WO2008042048A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F01N3/025—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 fuel burner or by adding fuel to exhaust
    • F01N3/0253—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 fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F01N3/0256—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 fuel burner or by adding fuel to exhaust adding fuel to exhaust gases the fuel being ignited by electrical 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
    • F01N3/02—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
    • 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
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration
    • 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
    • F02B37/004—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust drives arranged in series
    • 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
    • F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
    • 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

Definitions

  • the present disclosure relates generally to an exhaust treatment system and, more particularly, to managing the temperature of one or more components of an exhaust treatment system with a regeneration device.
  • the pollutants may be composed of gaseous compounds, which may include nitrous oxides (NOx), and solid particulate matter.
  • Particulate matter may include soluble organic fraction, soot (unburned carbon), and/or unburned hydrocarbons.
  • EGR exhaust gas recirculation
  • the exhaust gas is passed through a particulate filter configured to capture and/or otherwise extract a portion of the soot, soluble organic fraction, and/or unbumed hydrocarbons contained carried by the exhaust.
  • the particulate filter may become saturated and may require cleaning through a regeneration process wherein the particulate matter is purged from the filter.
  • the particulate filter may include one or more catalyst materials configured to oxidize a portion of the soot, soluble organic fraction, and/or unburned hydrocarbons contained within the exhaust gas. The catalyst materials may also assist in reducing NOx and/or carbon monoxide present in the exhaust.
  • the catalyst materials may be most effective at temperatures in excess of their passive regeneration or "light-off temperature (the temperature at which the catalyst materials are capable of spontaneously oxidizing particulate matter).
  • the catalyst materials are said to have a relatively high conversion efficiency above their light-off temperatures, and peak conversion efficiency of the materials may occur in the range of approximately 300 degrees Celsius to approximately 450 degrees Celsius.
  • the catalyst materials may not be capable of oxidizing the particulate matter.
  • the amount of pollutants emitted by the system may exceed the maximum emissions limits set forth by the Environmental Protection Agency when the catalyst materials are at relatively low temperatures.
  • Such operating conditions may be characterized by an increase in the amount of whitesmoke exiting the system as well as an increase in the intensity and amount of unpleasant odors given off.
  • a filter system can be used to remove particulate matter from a flow of engine exhaust gas before a portion of the gas is fed back to an intake air stream of the engine.
  • the '436 patent discloses an engine exhaust filter containing a catalyst and a filter element. A portion of the filtered exhaust is extracted downstream of the filter and is directed to an intake of the engine through a recirculation loop.
  • the filter system of the '436 patent may protect the engine from harmful particulate matter, the system may not be configured to improve the effectiveness of catalyst materials located in the system by actively increasing the temperature of the catalyst materials to a predetermined temperature within their peak conversion efficiency range.
  • the disclosed exhaust treatment system is directed to overcoming one or more of the problems set forth above.
  • a method of controlling an exhaust treatment system includes sensing a temperature representative of a catalyst material temperature at start-up of a power source and comparing the sensed temperature to a threshold temperature. The method also includes igniting a regeneration device of the exhaust treatment system in response to the comparing. The regeneration device is disposed upstream of the catalyst material. The method further includes operating the regeneration device at a target temperature.
  • a method of reducing the emissions of an internal combustion engine includes igniting a regeneration device fluidly connected to the internal combustion engine and increasing the temperature of a catalyst material to a target temperature during a low exhaust temperature operation of the internal combustion engine. The method also includes maintaining the temperature of the catalyst material at the target temperature for a predetermined period of time.
  • an exhaust treatment system of a power source includes a catalyst material and a regeneration device disposed upstream of the catalyst material.
  • the regeneration device is configured to increase a temperature of the catalyst material to a target temperature at start-up of the power source and in response to a sensed parameter of the exhaust treatment system.
  • the system further includes a particulate filter configured to extract components from an exhaust flow of the power source.
  • Fig. 1 is a diagrammatic illustration of an engine having an exhaust treatment system according to an exemplary embodiment of the present disclosure.
  • Fig. 2 is a diagrammatic illustration of an engine having an exhaust treatment system according to another exemplary embodiment of the present disclosure.
  • Fig. 3 is a flow chart of a control strategy according to an exemplary embodiment of the present disclosure.
  • Fig. 1 illustrates a power source 12 having an exemplary exhaust treatment system 10.
  • the power source 12 may include an engine, such as, for example, a diesel engine, a gasoline engine, a natural gas engine, or any other engine apparent to one skilled in the art.
  • the power source 12 may, alternately, include another source of power, such as a furnace or any other source of power known in the art.
  • the exhaust treatment system 10 may be configured to direct exhaust gases out of the power source 12, treat the gases, and introduce a portion of the treated gases into an inlet 21 of the power source 12.
  • the exhaust treatment system 10 may include an energy extraction assembly 22 and a treatment element 19.
  • the treatment element 19 may include, for example, a regeneration device 20, a filter 16, and/or a catalyst 18.
  • the exhaust treatment system 10 may further include a recirculation line 24 fluidly connected between the filter 16 and the catalyst 18, and a flow cooler 26.
  • the exhaust treatment system 10 may still further include a flow sensor 28, a mixing valve 30, a compression assembly 32, and an aftercooler 34.
  • a flow of exhaust produced by the power source 12 may be directed from the power source 12 to components of the exhaust treatment system 10 by flow lines 15.
  • the power source 12 may include one or more combustion chambers (not shown) fluidly connected to an exhaust manifold.
  • the flow lines 15 may be configured to transmit a flow of exhaust from the combustion chambers to the components of the exhaust treatment system 10 via the exhaust manifold.
  • the flow lines 15 may include pipes, tubing, and/or other exhaust flow carrying means known in the art.
  • the flow lines 15 may be made of alloys of steel, aluminum, and/or other materials known in the art.
  • the flow lines 15 may be rigid or flexible, and may be capable of safely carrying high temperature exhaust flows, such as flows having temperatures in excess of 700 degrees Celsius (approximately 1,292 degrees Fahrenheit).
  • the energy extraction assembly 22 may be configured to extract energy from, and reduce the pressure of, the exhaust gases produced by the power source 12.
  • the energy extraction assembly 22 may be fluidly connected to the power source 12 by one or more flow lines 15 and may reduce the pressure of the exhaust gases to any desired pressure.
  • the energy extraction assembly 22 may include one or more turbines 14, diffusers, or other energy extraction devices known in the art. In an exemplary embodiment wherein the energy extraction assembly 22 includes more than one turbine 14, the multiple turbines 14 may be disposed in parallel or in series relationship. It is also understood that in an embodiment of the present disclosure, the energy extraction assembly 22 may, alternately, be omitted.
  • the power source 12 may include, for example, a naturally aspirated engine.
  • a component of the energy extraction assembly 22 may be configured in certain embodiments to drive a component of the compression assembly 32.
  • the regeneration device 20 of the treatment element 19 may be fluidly connected to the energy extraction assembly 22 via flow line 15 and may be configured to increase the temperature of an entire flow of exhaust produced by the power source 12 to a desired temperature.
  • the desired temperature may be, for example, a regeneration temperature of the filter 16. Accordingly, the regeneration device 20 may be configured to assist in actively regenerating the filter 16.
  • the desired temperature may be, for example, a threshold temperature corresponding to the minimum passive regeneration or light-off temperature of catalyst materials disposed downstream of the regeneration device 20.
  • the desired temperature may also be a target temperature corresponding to, for example, a peak conversion efficiency range of the catalyst materials.
  • This peak conversion efficiency range of the materials may occur in the range of approximately 300 degrees Celsius to approximately 450 degrees Celsius, and in an exemplary embodiment, the target temperature may be between approximately 300 degrees Celsius and approximately 350 degrees Celsius.
  • the target temperature may also correspond to a minimum temperature setting of the regeneration device 20.
  • such catalyst materials may be disposed within a catalyst 18 of the exhaust treatment system 10.
  • such catalyst materials may be disposed within a filter 36 (FIG. 2) of the present disclosure.
  • the regeneration device 20 may be configured to increase the temperature of only a portion of the entire flow of exhaust produced by the power source 12.
  • the regeneration device 20 may include, for example, a fuel injector and an ignitor (not shown), heat coils (not shown), and/or other heat sources known in the art. Such heat sources may be disposed within the regeneration device 20 and may be configured to assist in increasing the temperature of the flow of exhaust through convection, combustion, and/or other methods.
  • the regeneration device 20 includes a fuel injector and an ignitor, it is understood that the regeneration device 20 may receive a supply of a combustible substance and a supply of oxygen to facilitate combustion within the regeneration device 20.
  • the combustible substance may be, for example, gasoline, diesel fuel, reformate, and/or any other combustible substance known in the art.
  • the supply of oxygen may be provided in addition to the relatively low pressure flow of exhaust gas directed to the regeneration device 20 through flow line 15.
  • the supply of oxygen may be carried by a flow of gas directed to the regeneration device 20 from downstream of the compression assembly 32 via a supply line 40.
  • the flow of gas may include, for example, recirculated exhaust gas and ambient air.
  • the supply line 40 may be fluidly connected to an outlet of the compression assembly 32.
  • the regeneration device 20 may be dimensioned and/or otherwise configured to be housed within an engine compartment or other compartment of a work machine (not shown) to which the power source 12 is attached.
  • the regeneration device 20 may be desirably calibrated in conjunction with, for example, the filter 16, the energy extraction assembly 22, the catalyst 18, and/or the power source 12.
  • Calibration of the regeneration device 20 may include, for example, among other things, adjusting the rate, angle, and/or atomization at which fuel is injected into the regeneration device 20, adjusting the flow rate of the oxygen supplied, adjusting the intensity and/or firing pattern of the ignitor, and adjusting the length, diameter, mounting angle, and/or other configurations of a housing of the regeneration device 20.
  • Such calibration may reduce the time required to regenerate the filter 16 and the amount of fuel or other combustible substances needed for regeneration. Either of these results may improve the overall efficiency of the exhaust treatment system 10. It is understood that the efficiency of the exhaust treatment systems 10, 100 described herein may be measured by a variety of factors, including, among other things, the amount of fuel used for regeneration, the length of the regeneration period, and the amount (parts per million) of pollutants released to the atmosphere.
  • the filter 16 of the treatment element 19 may be connected downstream of the regeneration device 20.
  • the filter 16 may have a housing 25 including an inlet 23 and an outlet 31.
  • the regeneration device 20 may be disposed outside of the housing 25 and may be fluidly connected to the inlet 23 of the housing 25.
  • the regeneration device 20 may be disposed within the housing 25 of the filter 16.
  • the filter 16 may be any type of filter known in the art capable of extracting matter from a flow of gas.
  • the filter 16 may be, for example, a particulate matter filter positioned to extract particulate matter from an exhaust flow of the power source 12.
  • the filter 16 may include, for example, a ceramic substrate, a metallic mesh, foam, or any other porous material known in the art. These materials may form, for example, a honeycomb structure within the housing 25 of the filter 16 to facilitate the removal of particulate matter.
  • the particulate matter may include, for example, soluble organic fraction, unburned hydrocarbons, and/or soot.
  • a portion of the exhaust produced by the combustion process may leak past piston seal rings within a crankcase (not shown) of the power source 12.
  • This portion of the exhaust often called “blow-by gases” or simply “blow-by,” may contain one or more of the exhaust gas components discussed above.
  • the blow-by gases may also contain oil droplets and oil vapor. The blow-by gases may build up within the crankcase over time, thereby increasing the pressure within the crankcase.
  • a ventilation line 42 may be fluidly connected to the crankcase of the power source 12.
  • the ventilation line 42 may also be fluidly connected to, for example, a port 46 disposed upstream of the filter 16 and/or the regeneration device 20.
  • the ventilation line 42 may comprise piping, tubing, and/or other exhaust flow carrying means known in the art and may be structurally similar to the flow lines 15 described above.
  • the ventilation line 42 may include, for example, a check valve 44 and/or any other valve assembly known in the art.
  • the check valve 44 may be configured to assist in controllably regulating a flow of fluid through the ventilation line 42. In an exemplary embodiment, the check valve 44 may be configured to assist in releasing built-up blow-by gases from the crankcase.
  • the catalyst 18 of the exhaust treatment system 10 may be disposed downstream of the filter 16.
  • the catalyst 18 may contain catalyst materials useful in collecting, absorbing, adsorbing, and/or storing hydrocarbons, oxides of sulfur, and/or oxides of nitrogen contained in a flow.
  • Such catalyst materials may include, for example, aluminum, platinum, palladium, rhodium, barium, cerium, and/or alkali metals, alkaline-earth metals, rare-earth metals, or combinations thereof.
  • the catalyst materials may be situated within the catalyst 18 so as to maximize the surface area available for the collection of, for example, hydrocarbons.
  • the catalyst 18 may include, for example, a ceramic substrate, a metallic mesh, foam, or any other porous material known in the art, and the catalyst materials may be located on, for example, a substrate of the catalyst 18.
  • the filter 36 of the exhaust treatment system 100 may include catalyst materials useful in collecting, absorbing, adsorbing, and/or storing hydrocarbons, oxides of sulfur, and/or oxides of nitrogen contained in a flow.
  • the catalyst 18 (FIG. 1) may be omitted.
  • the catalyst materials may include, for example, any of the catalyst materials discussed above with respect to the catalyst 18 (FIG. 1).
  • the catalyst materials may be situated within the filter 36 so as to maximize the surface area available for absorption, adsorption, and or storage.
  • the catalyst materials may be located on a substrate of the filter 36.
  • the catalyst materials may be added to the filter 36 by any conventional means, such as, for example, coating or spraying, and the substrate of the filter 36 may be partially or completely coated with the materials. It is understood that the presence of catalyst materials, such as, for example, platinum and/or palladium, upstream of the recirculation line 24 may result in the formation of sulfate in the exhaust treatment system 100. Accordingly, to minimize the amount of sulfate formed in the exemplary embodiment of FIG. 2, only minimal amounts of catalyst materials may be incorporated into the filter 36.
  • the catalyst materials described above with respect to FIGS. 1 and 2 may be capable of oxidizing one or more components of an exhaust flow, such as, for example, particulate matter, hydrocarbons, and/or carbon monoxide.
  • an exhaust flow such as, for example, particulate matter, hydrocarbons, and/or carbon monoxide.
  • a portion of the particulate matter, hydrocarbons, and/or carbon monoxide contained within the exhaust flow may be permitted to travel back to the power source 12 without being oxidized by the catalyst materials.
  • the catalyst materials discussed above may assist in the formation of sulfate, the presence of these catalyst materials, either on a substrate of the filter 36 (FIG. 2) or in the catalyst 18 (FIG. 1), may improve the overall emissions characteristics of the exhaust treatment systems 10, 100 by, for example, removing hydrocarbons from the treated exhaust flow.
  • the catalyst materials disposed on the substrate of the filter 36 may assist in passively regenerating the filter 36 during power source operation.
  • the exhaust flow may reach temperatures in excess of, for example, 250 degrees Celsius during normal operation of the power source 12 (i.e., without operating the power source 12 in a manner so as to increase the temperature of the exhaust by, for example, wastegating or other conventional methods), and the exhaust gas may increase the temperature of at least a portion of the filter substrate through convective heat transfer.
  • the components of the power source exhaust trapped by the substrate of the filter 36 may begin to react with the catalyst material located on the substrate.
  • the catalyst material may passively regenerate a portion of the filter 36 by oxidizing particulate matter trapped by the filter substrate as well as carbon monoxide and/or hydrocarbons contained in the exhaust flow. Oxidation may occur at the passive regeneration or light-off temperature of the filter 36 in which the catalyst material is hot enough to react with the components of the exhaust flow without additional heat being provided by, for example, the regeneration device 20. Such light-off temperatures may be below the regeneration temperature of the filter 36. In an exemplary embodiment, a light-off temperature of the filter 36 may be between approximately 250 degrees Celsius and approximately 350 degrees Celsius.
  • an exemplary exhaust treatment system 100 of the present disclosure may, nonetheless, include a regeneration device 20. Utilizing a catalyzed filter 36 in conjunction with a regeneration device 20 may assist in increasing the interval between active regenerations. Increasing this interval may reduce the amount of, for example, fuel burned during operation of the power source 12 and may, thus, reduce the cost of operating the machine to which the power source 12 is connected.
  • An exhaust treatment system 100 including both a catalyzed filter 36 and a regeneration device 20 may also enable filter manufacturers to include less catalyst material (such as, for example, precious metals) in the filter 36, thereby reducing the cost of the filter 36 and the overall cost of the system 100.
  • the exhaust treatment system 10 may further include a recirculation line 24 fluidly connected downstream of the filter 16.
  • the recirculation line 24 may be disposed between the filter 16 and the catalyst 18, and may be configured to assist in directing a portion of the exhaust flow from the filter 16 to the inlet 21 of the power source 12.
  • the recirculation line 24 may comprise piping, tubing, and/or other exhaust flow carrying means known in the art, and may be structurally similar to the flow lines 15 described above.
  • the exhaust treatment system 100 (FIG. 2) includes a filter 36 containing catalyst materials
  • the recirculation line 24 may be disposed downstream of the filter 36 and upstream of an exhaust system outlet 17.
  • the flow cooler 26 may be fluidly connected to the filter 16 via the recirculation line 24 and may be configured to cool the portion of the exhaust flow passing through the recirculation line 24.
  • the flow cooler 26 may include a liquid-to-air heat exchanger, an air-to-air heat exchanger, or any other type of heat exchanger known in the art for cooling an exhaust flow. In an alternative exemplary embodiment of the present disclosure, the flow cooler 26 may be omitted.
  • the mixing valve 30 may be fluidly connected to the flow cooler 26 via the recirculation line 24 and may be configured to assist in regulating the flow of exhaust through the recirculation line 24. It is understood that in an exemplary embodiment, a check valve (not shown) may be fluidly connected upstream of the flow cooler 26 to further assist in regulating the flow of exhaust through the recirculation line 24.
  • the mixing valve 30 may be a spool valve, a shutter valve, a butterfly valve, a check valve, a diaphragm valve, a gate valve, a shuttle valve, a ball valve, a globe valve, or any other valve known in the art.
  • the mixing valve 30 may be actuated manually, electrically, hydraulically, pneumatically, or in any other manner known in the art.
  • the mixing valve 30 may be in communication with a controller (not shown) and may be selectively actuated in response to one or more predetermined conditions.
  • the mixing valve 30 may also be fluidly connected to an ambient air intake 29 of the exhaust treatment system 10.
  • the mixing valve 30 may be configured to control the amount of exhaust flow entering a flow line 27 relative to the amount of ambient air flow entering the flow line 27. For example, as the amount of exhaust flow passing through the mixing valve 30 is desirably increased, the amount of ambient air flow passing through the mixing valve 30 may be proportionally decreased and vice versa.
  • the flow sensor 28 may be fluidly connected to the recirculation line 24 downstream of the flow cooler 26.
  • the flow sensor 28 may be any type of mass air flow sensor, such as, for example, a hot wire anemometer or a venturi-type sensor.
  • the flow sensor 28 may be configured to sense the amount of exhaust flow passing through the recirculation line 24. It is understood that the flow cooler 26 may assist in reducing fluctuations in the temperature of the portion of the exhaust flow passing through the recirculation line 24. Reducing temperature fluctuations may also assist in reducing fluctuations in the volume occupied by a flow of exhaust gas since a high temperature mass of gas occupies a greater volume than the same mass of gas at a low temperature. Thus, sensing the amount of exhaust flow through the recirculation line 24 at positions downstream of the flow cooler 26 (i.e., at a relatively controlled temperature) may result in more accurate flow measurements than measurements taken upstream of the flow cooler 26. It is further understood that the flow sensor 28 may also include, for example, a thermocouple (not shown) or other device configured to sense the temperature of the exhaust flow.
  • the flow line 27 downstream of the mixing valve 30 may direct the ambient air/exhaust flow mixture to the compression assembly 32.
  • the compression assembly 32 may include a compressor 13 configured to increase the pressure of a flow of gas at a desired pressure.
  • the compressor 13 may include a fixed geometry-type compressor, a variable geometry-type compressor, or any other type of compressor known in the art.
  • the compression assembly 32 may include more than one compressor 13, and the multiple compressors 13 may be disposed in parallel or in series relationship.
  • a compressor 13 of the compression assembly 32 may be connected to a turbine 14 of the energy extraction assembly 22, and the turbine 14 may be configured to drive the compressor 13.
  • the compressor 13 may be driven by, for example, the power source 12, or by any other drive known in the art. It is also understood that in a nonpressurized air induction system, the compression assembly 32 may be omitted.
  • the aftercooler 34 may be fluidly connected to the power source 12 via the flow line 27 and may be configured to cool a flow of gas passing through the flow line 27. In an exemplary embodiment, this flow of gas may be the ambient air/exhaust flow mixture discussed above.
  • the aftercooler 34 may include a liquid-to-air heat exchanger, an air-to-air heat exchanger, or any other type of flow cooler or heat exchanger known in the art. In an exemplary embodiment of the present disclosure, the aftercooler 34 may be omitted, if desired.
  • the exhaust treatment system 10 may further include a condensate drain 38 fluidly connected to the aftercooler 34.
  • the condensate drain 38 may be configured to collect a fluid, such as, for example, water or other condensate formed at the aftercooler 34. It is understood that such fluids may consist of, for example, condensed water vapor contained in recycled exhaust gas and/or ambient air.
  • the condensate drain 38 may include a removably attachable fluid tank (not shown) capable of safely storing the condensed fluid. The fluid tank may be configured to be removed, safely emptied, and reconnected to the condensate drain 38.
  • the condensate drain 38 may be configured to direct the condensed fluid to a fluid container (not shown) and/or other component or location on the work machine.
  • the condensate drain 38 may be configured to direct the fluid to the atmosphere or to the surface by which the work machine is supported.
  • the exhaust treatment systems 10, 100 of the present disclosure may be used with any combustion-type device, such as, for example, an engine, a furnace, or any other device known in the art where the recirculation of reduced- particulate exhaust into an inlet of the device is desired.
  • the exhaust treatment systems 10, 100 may be useful in reducing the amount of harmful exhaust emissions discharged to the environment.
  • the exhaust treatment systems 10, 100 may also be capable of purging the portions of the exhaust gas captured by components of the system through a regeneration process.
  • the combustion process may produce a complex mixture of air pollutants.
  • pollutants may exist in solid, liquid, and/or gaseous form.
  • the solid and liquid pollutants may fall into the three categories of soot, soluble organic fraction, and unburned hydrocarbons.
  • the soot produced during combustion may include carbonaceous materials, and the soluble organic fraction may include unburned hydrocarbons that are deposited on or otherwise chemically combined with the soot.
  • the Environmental Protection Agency Due to increasing concerns about the health of the environment, the Environmental Protection Agency has mandated that, for 2007, hydrocarbon emissions for on-highway vehicles must be less than or equal to 0.14 grams/horsepower hour.
  • Various exhaust treatment strategies are required in order to meet these stringent emissions requirements at substantially all power source operating conditions.
  • components of the exhaust treatment systems 10, 100 such as, for example, the catalyst materials, may be heated when the vehicle is operated at low exhaust temperature conditions.
  • Such conditions may exist, for example, upon start-up of the power source 12 and during a prolonged period of time in which the power source 12 operates at or near idle.
  • the catalyst materials may be below their light-off temperature, and heating the catalyst materials may assist in increasing their conversion efficiency.
  • the operation of the exhaust treatment systems 10, 100 will now be explained in detail. Unless otherwise noted, the exhaust treatment system 100 of FIG. 2 and the control strategy 50 illustrated in FIG. 3 will be referred to for the duration of the disclosure.
  • sensors of the exhaust treatment system 100 may sense parameters of the power source 12 and/or the exhaust treatment system 100. Such parameters may include, for example, engine speed, engine temperature, exhaust flow temperature, exhaust flow pressure, and/or particulate matter content.
  • the sensors may also be electrically connected to a controller (not shown) and may be configured to send signals containing sensed information to the controller.
  • a temperature sensor 48 may be disposed proximate the outlet 31 of the filter 36 and may be configured to sense the temperature of the exhaust flow exiting the filter 36.
  • the temperature sensor 48 may be disposed proximate an outlet of the catalyst 18 (FIG. 1).
  • the temperature sensor 48 may be configured to sense a temperature representative of catalyst material temperature (step 54) and may also be configured to send signals indicative of the sensed temperature to the controller on a substantially continuous basis.
  • the sensed temperature may be representative of the temperature of the catalyst materials at start-up of the power source 12 and/or during a prolonged low exhaust temperature operation of the power source 12.
  • the controller may store the information for further use.
  • the controller may also manipulate the information in any conventional mathematical and/or statistical way, such as, for example, by entering the information into one or more preset algorithms used to control one or more components of the exhaust treatment system 100. For example, the controller may compare the sensed temperature to a predetermined threshold temperature (step 56).
  • the threshold temperature may correspond, for example, to the light- off temperature of the catalyst materials disposed within the filter 36, and in an exemplary embodiment, the threshold temperature may be approximately 250 degrees Celsius. If the sensed temperature is above the predetermined threshold temperature, the exhaust treatment system 100 may continue to operate according to a steady state control strategy (step 58) stored within the controller. The steady state control strategy may apply to situations where, for example, the temperature of the catalyst materials within the filter 36 is above the light-off temperature of the catalyst materials. If, on the other hand, the sensed temperature is below the predetermined threshold temperature, the controller may ignite the regeneration device 20 (step 60).
  • Igniting the regeneration device 20 may include a number of system verification processes, such as, for example, sensing the pressure and/or flow rate of the combustible substance and supply of oxygen being directed to the regeneration device 20 for combustion, and substantially blocking a flow of recirculated exhaust gas from entering the mixing valve 30 (and, thus, from entering the inlet 21 of the power source 12). Igniting the regeneration device 20 may also include, for example, energizing the ignitor, injecting the combustible substance, and regulating the supply of oxygen passing to the regeneration device 20.
  • the regeneration device 20 may be controlled to operate at a target temperature (step 62).
  • the target temperature may correspond to the minimum temperature setting of the regeneration device 20 and may be within a peak conversion efficiency range of the catalyst materials.
  • the target temperature may be between approximately 300 degrees Celsius and approximately 350 degrees Celsius.
  • Operating the regeneration device 20 in this way may heat the exhaust gas flowing therethrough to the target temperature and may begin to increase the temperature of the catalyst materials of the filter 36 through convection and/or conduction. Accordingly, a temperature of the exhaust flow measured by a temperature sensor 49 disposed upstream of the catalyst materials should be equal to the target temperature.
  • the controller may also modify one or more control parameters of the exhaust treatment system 100 (step 64), and such modifications may approximate the control parameters utilized during regeneration of the filter 36.
  • the controller may modify the position and/or other settings of the mixing valve 30. Such modified settings may allow a flow of recirculated exhaust gas to once again enter the mixing valve 30, but may result in a relative decrease in the amount of recirculated exhaust gas being supplied to the inlet 21 of the power source 12 compared to the steady state control strategy discussed above. In an exemplary embodiment, the amount of recirculated exhaust gas being supplied to the inlet 21 may be reduced by as much as approximately 50 percent under these modified settings.
  • the controller may also modify the timing of one or more intake valves (not shown) associated with the inlet 21 and may alter the boost level of the energy extraction assembly 22.
  • the temperature sensors 48, 49 may then be used to sense a temperature upstream and downstream of the catalyst materials (step 66). As discussed above, the temperature of the exhaust flow upstream of the catalyst materials may be raised to the target temperature by way of the regeneration device 20. Thus, the temperature sensed by temperature sensor 49 may be approximately equal to the target temperature. The temperature sensed by temperature sensor 48, on the other hand, may approximate the temperature of the catalyst materials and/or the filter 36, and may initially be less than a temperature sensed upstream thereof. The temperature sensors 48, 49 may send signals containing this sensed temperature information to the controller, and the controller may determine whether the temperature sensed downstream of the catalyst materials is greater than or equal to the target temperature (step 68).
  • the regeneration device 20 may be controlled to continue heating the exhaust gas to the target temperature, and the temperature sensors 48, 49 may continue to sense temperatures upstream and downstream of the catalyst materials (step 66). If, on the other hand, the temperature sensed downstream of the catalyst materials is greater than or equal to the target temperature, the controller may command the regeneration device 20 to continue burning at the target temperature for a predetermined period of time (step 70).
  • the predetermined period of time may be any desirable length of time useful in ensuring that the entire substrate, mesh, and/or other structure on which the catalyst materials are disposed has substantially uniformly reached the target temperature. Holding the regeneration device 20 at the target temperature for the predetermined period of time may also substantially mitigate any errors in the sensed temperature values.
  • the predetermined period of time may be 90 seconds.
  • the regeneration device 20 may be turned off (step 72) and the control parameters of the exhaust treatment system 100 that were modified in step 62 may be reset to the values, positions, and/or settings that were operative at start-up (step 74).
  • the values, positions, and/or settings of the control parameters selected in step 74 may be substantially the same as those utilized by the steady state control strategy of step 58.
  • Controlling the components of the exhaust treatment system 100 in this way may assist in reducing, for example, the particulate matter emissions of the power source 12.
  • rapidly increasing the temperature of the catalyst materials disposed within the exhaust treatment system 100 to at least their light-off temperature may assist in reducing hydrocarbon emissions of the power source 12 at start-up.
  • the catalyst materials may oxidize substantially all of the hydrocarbon present in an exhaust flow of the power source 12, thereby reducing the amount of harmful pollutants released to the environment and minimizing the levels of whitesmoke and undesirable odors emitted by the exhaust treatment system 100.
  • Other embodiments of the disclosed exhaust treatment systems 10 are examples of the disclosed exhaust treatment systems 10,
  • the systems 10, 100 may include additional filters, such as, for example, a sulfur trap disposed upstream of the filter 36.
  • the sulfur trap may be useful in capturing sulfur molecules carried by the exhaust flow. It is intended that the specification and examples be considered as exemplary only, with the true scope of the invention being indicated by the following claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

L'invention concerne un procédé de régulation de système de traitement d'échappement (10, 100), consistant à détecter une température représentant la température d'un matériau catalyseur au démarrage d'une source d'alimentation (12), et à comparer la température détectée avec une température seuil. Ce procédé consiste également à allumer un dispositif de régénération (20) du système de traitement d'échappement (10, 100) en réponse à la comparaison. Le dispositif de régénération (20) est disposé en amont du matériau catalyseur. Le procédé selon l'invention consiste également à faire fonctionner le dispositif de régénération (20) à une température cible.
PCT/US2007/017761 2006-09-29 2007-08-10 Gestion de la temperature dans un systeme de traitement d'echappement Ceased WO2008042048A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112007002202T DE112007002202T5 (de) 2006-09-29 2007-08-10 Temperaturmanagement in einem Abgasbehandlungssystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/529,473 US20080078170A1 (en) 2006-09-29 2006-09-29 Managing temperature in an exhaust treatment system
US11/529,473 2006-09-29

Publications (1)

Publication Number Publication Date
WO2008042048A1 true WO2008042048A1 (fr) 2008-04-10

Family

ID=38896026

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/017761 Ceased WO2008042048A1 (fr) 2006-09-29 2007-08-10 Gestion de la temperature dans un systeme de traitement d'echappement

Country Status (4)

Country Link
US (1) US20080078170A1 (fr)
CN (1) CN101535607A (fr)
DE (1) DE112007002202T5 (fr)
WO (1) WO2008042048A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10704437B2 (en) 2017-05-04 2020-07-07 Volkswagen Aktiengesellschaft Exhaust system for an internal combustion engine and method for operating such an exhaust system

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110000193A1 (en) * 2009-07-02 2011-01-06 Woodward Governor Company System and method for detecting diesel particulate filter conditions based on thermal response thereof
SE536026C2 (sv) * 2010-08-31 2013-04-09 Scania Cv Ab Förfarande och system för avgasrening
DE102010050406A1 (de) * 2010-11-04 2012-05-10 Daimler Ag Kraftfahrzeug-Brennkraftmaschine und Betriebsverfahren für eine Kraftfahrzeug-Brennkraftmaschine
ES2737849T3 (es) * 2012-02-22 2020-01-16 Watlow Electric Mfg Procedimiento de calentamiento de un gas de escape en un sistema de post-tratamiento del escape
US20150020503A1 (en) * 2013-07-18 2015-01-22 International Engine Intellectual Property Company, Llc Control of passive soot oxidation
US10145343B2 (en) * 2015-05-13 2018-12-04 Cummins Emission Solutions, Inc. Systems and methods for regeneration of a diesel oxidation catalyst in a dual-fuel engine
GB2546488B (en) * 2016-01-19 2020-05-13 Ford Global Tech Llc An engine exhaust gas recirculation system with at least one exhaust recirculation treatment device
CN107023366A (zh) * 2017-05-26 2017-08-08 凯龙高科技股份有限公司 一种用于非道路农机的燃烧器dpf再生控制与诊断系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6568173B1 (en) * 2000-08-02 2003-05-27 Ford Global Technologies, Inc. Control method for turbocharged diesel engine aftertreatment system
EP1344909A2 (fr) * 2002-03-12 2003-09-17 Adam Opel Ag Procédé de fonctionnement d'un filtre à particules d'un moteur diesel et dispositif pour la réalisation du procédé
WO2004027228A1 (fr) * 2002-09-12 2004-04-01 Robert Bosch Gmbh Systeme et procede d'epuration de gaz d'echappement
DE102005013707A1 (de) * 2005-03-24 2006-09-28 Daimlerchrysler Ag Kraftfahrzeug mit Brennkraftmaschine und Verfahren zum Betreiben einer Brennkraftmaschine

Family Cites Families (93)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765386A (en) * 1971-06-16 1973-10-16 F Ottofy Anti-pollution device for and method of removing oil from air vented from the crankcase of an internal combustion engine and returning the oil to the crankcase
US3769798A (en) * 1972-03-22 1973-11-06 H Whittaker Anti-pollution exhaust system for an internal combustion engine
US3864980A (en) * 1972-07-24 1975-02-11 Cecil R Barnes Apparatus for balancing tire and wheel assemblies
US3844260A (en) * 1972-11-01 1974-10-29 Stp Corp Exhaust gas recirculating valve
US3903858A (en) * 1973-04-23 1975-09-09 Stearns C Wayne Crankcase fumes treatment
US4092962A (en) * 1974-09-23 1978-06-06 Steven P. Corrigan Precarburetor ignition system
US4011846A (en) * 1975-03-24 1977-03-15 Did-Mor Engineering And Manufacturing Co. Anti-pollution device
US4136650A (en) * 1977-03-02 1979-01-30 Manookian Jr Arman Crankcase oil vapor recovery system
US4211075A (en) * 1978-10-19 1980-07-08 General Motors Corporation Diesel engine exhaust particulate filter with intake throttling incineration control
US4535588A (en) * 1979-06-12 1985-08-20 Nippon Soken, Inc. Carbon particulates cleaning device for diesel engine
US4270508A (en) * 1979-10-12 1981-06-02 U.S.A. 161 Developments Ltd. Combustion control system
US4363310A (en) * 1980-07-03 1982-12-14 General Motors Corporation Diesel engine with blowby scavenging
DE3331095A1 (de) * 1982-08-31 1984-03-01 Honda Giken Kogyo K.K., Tokyo Ansaugkruemmer fuer einem mehrzylindrigen motor
US4608640A (en) * 1983-01-10 1986-08-26 Nissan Motor Company, Limited Trap regenerative device control apparatus
US4570603A (en) * 1983-09-01 1986-02-18 Roberto Piedrafita Apparatus for improving gasoline consumption, power and reducing emission pollutants of internal combustion engines
CH664798A5 (de) * 1983-11-14 1988-03-31 Bbc Brown Boveri & Cie Vorrichtung zur rueckfuehrung der abblasemenge aus dem kurbelgehaeuse.
US4616620A (en) * 1983-11-14 1986-10-14 Paoluccio John A Contamination control apparatus
US4512325A (en) * 1984-03-12 1985-04-23 Depakh Stephan Emission control device
US4558681A (en) * 1984-05-17 1985-12-17 Caterpillar Tractor Co. Exhaust gas and blow-by recirculation system for an internal combustion engine
JPS6270653A (ja) * 1985-09-24 1987-04-01 Yamaha Motor Co Ltd Ｖ形エンジンの排気浄化装置
US5251564A (en) * 1990-04-26 1993-10-12 Rim Julius J Combustion box exhaust filtration system and method
US5085049A (en) * 1990-07-09 1992-02-04 Rim Julius J Diesel engine exhaust filtration system and method
US5027783A (en) * 1990-10-17 1991-07-02 Von Riesen Clark W Carburetor for an internal combustion engine
JP3025332B2 (ja) * 1991-03-28 2000-03-27 マツダ株式会社 エンジンの排気ガス還流装置
US5277154A (en) * 1992-09-21 1994-01-11 Mcdowell Alex R Oil/air separator and method thereof
US5444976A (en) * 1994-06-27 1995-08-29 General Motors Corporation Catalytic converter heating
US5494020A (en) * 1994-11-25 1996-02-27 Meng; Frank Apparatus for recycling the exhaust gas of an engine crankcase
DE19504183A1 (de) * 1995-02-09 1996-08-14 Eberspaecher J Brenner zur thermischen Regeneration eines Partikelfilters in einem Abgasnachbehandlungssystem eines Verbrennungsmotors, insbesondere Dieselmotors
JPH08303238A (ja) * 1995-05-11 1996-11-19 Ishikawajima Shibaura Mach Co Ltd ４サイクルエンジン
US5941219A (en) * 1996-08-15 1999-08-24 Takebe; Masayuki Method and apparatus for cleaning exhaust gas by alpha-decay
US5803025A (en) * 1996-12-13 1998-09-08 Caterpillar Inc. Blowby disposal system
US5927075A (en) * 1997-06-06 1999-07-27 Turbodyne Systems, Inc. Method and apparatus for exhaust gas recirculation control and power augmentation in an internal combustion engine
US5806308A (en) * 1997-07-07 1998-09-15 Southwest Research Institute Exhaust gas recirculation system for simultaneously reducing NOx and particulate matter
GB9717034D0 (en) * 1997-08-13 1997-10-15 Johnson Matthey Plc Improvements in emissions control
US6129058A (en) * 1997-09-11 2000-10-10 Muth; George R. Engine blow-by oil reservoir
US5860396A (en) * 1997-09-11 1999-01-19 Muth; George R. Engine blow-by oil reservoir
US6155213A (en) * 1998-08-24 2000-12-05 Tanis; Peter G. Internal combustion engine ventilation apparatus and method
US6221136B1 (en) * 1998-11-25 2001-04-24 Msp Corporation Compact electrostatic precipitator for droplet aerosol collection
SE519922C2 (sv) * 1998-12-07 2003-04-29 Stt Emtec Ab Anordning och förfarande för avgasrening samt användning av anordningen
JP3225957B2 (ja) * 1999-02-02 2001-11-05 トヨタ自動車株式会社 内燃機関
FR2792036B1 (fr) * 1999-04-06 2002-06-07 Peugeot Citroen Automobiles Sa Systeme d'aide a la regeneration d'un filtre a particules integre dans une ligne d'echappement d'un moteur diesel notamment de vehicule automobile
US6615580B1 (en) * 1999-06-23 2003-09-09 Southwest Research Institute Integrated system for controlling diesel engine emissions
US6247463B1 (en) * 1999-09-01 2001-06-19 Nelson Industries, Inc. Diesel engine crankcase ventilation filter
US6478019B2 (en) * 1999-09-01 2002-11-12 Nelson Industries, Inc. Flat low profile diesel engine crankcase ventilation filter
JP3549779B2 (ja) * 1999-09-17 2004-08-04 日野自動車株式会社 内燃機関
US6314722B1 (en) * 1999-10-06 2001-11-13 Matros Technologies, Inc. Method and apparatus for emission control
SE522391C2 (sv) * 2000-01-26 2004-02-03 Volvo Personvagnar Ab Vevhus- och emissionsventilation i en överladdad förbränningsmotor
US6304815B1 (en) * 2000-03-29 2001-10-16 Ford Global Technologies, Inc. Method for controlling an exhaust gas temperature of an engine for improved performance of exhaust aftertreatment systems
SE520863C2 (sv) * 2000-05-05 2003-09-09 Volvo Personvagnar Ab Metod och anordning för ventilering av gaser i en förbränningsmotor
JP4390980B2 (ja) * 2000-06-30 2009-12-24 本田技研工業株式会社 内燃機関における大気汚染防止装置
US6588201B2 (en) * 2000-07-05 2003-07-08 Gillespie Gavin Mckinley Crankcase ventilation system
DE20013534U1 (de) * 2000-08-07 2000-10-12 Mann & Hummel Filter Vorrichtung zur Rückführung von Gas an einem Verbrennungsmotor
US6826906B2 (en) * 2000-08-15 2004-12-07 Engelhard Corporation Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines
US6354283B1 (en) * 2000-08-29 2002-03-12 Fleetguard, Inc. Diesel engine modular crankcase ventilation filter
DE50000400D1 (de) * 2000-11-03 2002-09-26 Ford Global Tech Inc Regelungsanordnung und Verfahren zur Unterbrechung der Regeneration eines Partikelfilters eines Dieselmotors
US6345614B1 (en) * 2000-12-27 2002-02-12 Detroit Diesel Corporation Separator and oil trap for closed crankcase ventilator systems
US6439174B1 (en) * 2001-02-02 2002-08-27 General Electric Company Crankcase ventilation system
US6851415B2 (en) * 2001-07-16 2005-02-08 Budhadeb Mahakul System for exhaust/crankcase gas recirculation
CH695110A5 (de) * 2001-08-06 2005-12-15 Menag Holding Ag Verfahren zur Regelung eines Verbrennungsmotors mit Abgasrückführung sowie Einrichtung zur Durchführung des Verfahrens.
US6928359B2 (en) * 2001-08-09 2005-08-09 Ford Global Technologies, Llc High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature
DE50110758D1 (de) * 2001-09-25 2006-09-28 Ford Global Tech Llc Vorrichtung und Verfahren zur Regeneration einer Abgasbehandlungseinrichtung
US6718755B2 (en) * 2001-11-02 2004-04-13 Ford Global Technologies, Llc Method to increase temperature in an exhaust aftertreatment device coupled to a camless engine
US6598396B2 (en) * 2001-11-16 2003-07-29 Caterpillar Inc Internal combustion engine EGR system utilizing stationary regenerators in a piston pumped boost cooled arrangement
US7021048B2 (en) * 2002-01-25 2006-04-04 Arvin Technologies, Inc. Combination emission abatement assembly and method of operating the same
US6915629B2 (en) * 2002-03-07 2005-07-12 General Motors Corporation After-treatment system and method for reducing emissions in diesel engine exhaust
JP2003293796A (ja) * 2002-03-29 2003-10-15 Nissan Motor Co Ltd 内燃機関の吸気制御装置
US6694957B2 (en) * 2002-05-15 2004-02-24 General Motors Corporation Multi-orifice nozzle air evacuator assembly for a ventilation system of a diesel engine
EP2216368B8 (fr) * 2002-05-20 2012-05-16 Mitsui Chemicals, Inc. Composition de résine et film laminé, film de scellement et récipient obtenus de celle-ci
US6647973B1 (en) * 2002-06-11 2003-11-18 General Motors Corporation Two-stage filtration assembly for a diesel engine crankcase ventilation system
US6857263B2 (en) * 2002-08-08 2005-02-22 The United States Of America As Represented By The Administrator Of The Environmental Protection Agency Low emission diesel combustion system with low charge-air oxygen concentration levels and high fuel injection pressures
JP3824979B2 (ja) * 2002-08-09 2006-09-20 ボッシュ株式会社 フィルタ制御方法及び装置
US6899090B2 (en) * 2002-08-21 2005-05-31 Honeywell International, Inc. Dual path EGR system and methods
US7278259B2 (en) * 2002-08-23 2007-10-09 Donaldson Company, Inc. Apparatus for emissions control, system, and methods
US6738702B2 (en) * 2002-08-29 2004-05-18 Ford Global Technologies, Llc Method for particulate filter regeneration in vehicles having an automatically controlled transmission
US6729316B1 (en) * 2002-10-12 2004-05-04 Vortex Automotive Corporation Method and apparatus for treating crankcase emissions
US6981370B2 (en) * 2002-12-03 2006-01-03 Caterpillar Inc Method and apparatus for PM filter regeneration
US6691687B1 (en) * 2002-12-19 2004-02-17 Caterpillar Inc Crankcase blow-by filtration system
JP4135495B2 (ja) * 2002-12-20 2008-08-20 いすゞ自動車株式会社 燃料噴射制御装置
JP3823923B2 (ja) * 2003-01-16 2006-09-20 日産自動車株式会社 排気浄化装置
US6907869B2 (en) * 2003-01-17 2005-06-21 Parker-Hannifin Corporation Filter element and assembly with continuous drain
JP3894125B2 (ja) * 2003-01-28 2007-03-14 日産自動車株式会社 内燃機関の排気浄化装置
US6804952B2 (en) * 2003-02-21 2004-10-19 Toyota Jidosha Kabushiki Kaisha Catalyst warm up control for diesel engine
US7031827B2 (en) * 2003-04-11 2006-04-18 Ford Global Technologies, Llc Computer algorithm to estimate particulate filter regeneration rates
US6925994B2 (en) * 2003-06-03 2005-08-09 Richard G. Michel Regulated engine crankcase gas filter
JP4207695B2 (ja) * 2003-07-02 2009-01-14 マツダ株式会社 エンジンのｅｇｒ制御装置
JP2005048678A (ja) * 2003-07-30 2005-02-24 Nissan Motor Co Ltd 内燃機関の燃焼制御装置
US6981375B2 (en) * 2003-09-16 2006-01-03 Detroit Diesel Corporation Turbocharged internal combustion engine with EGR flow
JP4325367B2 (ja) * 2003-11-10 2009-09-02 株式会社デンソー 排気温度センサの故障検出装置
EP1531250B1 (fr) * 2003-11-12 2008-01-02 Toyota Jidosha Kabushiki Kaisha Dispositif et méthode de commande de l'injection de carburant dans un moteur à combustion interne
GB2408470B (en) * 2003-11-25 2007-06-13 Arvin Internat An internal combustion engine exhaust system
EP1541837B1 (fr) * 2003-12-08 2012-09-05 Nissan Motor Co., Ltd. Méthode et commande de génération d'un filtre à particules diesel
MXPA06007493A (es) * 2004-01-28 2007-04-17 New Condensator Inc Aparato para remover contaminantes de emisiones del carter.
US7159386B2 (en) * 2004-09-29 2007-01-09 Caterpillar Inc Crankcase ventilation system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6568173B1 (en) * 2000-08-02 2003-05-27 Ford Global Technologies, Inc. Control method for turbocharged diesel engine aftertreatment system
EP1344909A2 (fr) * 2002-03-12 2003-09-17 Adam Opel Ag Procédé de fonctionnement d'un filtre à particules d'un moteur diesel et dispositif pour la réalisation du procédé
WO2004027228A1 (fr) * 2002-09-12 2004-04-01 Robert Bosch Gmbh Systeme et procede d'epuration de gaz d'echappement
DE102005013707A1 (de) * 2005-03-24 2006-09-28 Daimlerchrysler Ag Kraftfahrzeug mit Brennkraftmaschine und Verfahren zum Betreiben einer Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10704437B2 (en) 2017-05-04 2020-07-07 Volkswagen Aktiengesellschaft Exhaust system for an internal combustion engine and method for operating such an exhaust system

Also Published As

Publication number Publication date
US20080078170A1 (en) 2008-04-03
DE112007002202T5 (de) 2009-07-09
CN101535607A (zh) 2009-09-16

Similar Documents

Publication Publication Date Title
US20080202101A1 (en) Exhaust treatment system
WO2008082467A1 (fr) Système de traitement de gaz d'échappement
RU2481478C2 (ru) Способ и устройство для холодного пуска двигателя внутреннего сгорания
WO2008042048A1 (fr) Gestion de la temperature dans un systeme de traitement d'echappement
US7107764B1 (en) Exhaust treatment system
WO2008027112A1 (fr) Système de traitement d'échappement
US20110041483A1 (en) Method of controlling fuel in an exhaust treatment system implementing temporary engine control
US20060021335A1 (en) Exhaust treatment system having particulate filters
WO2007081342A1 (fr) Méthode de commande de température d'un gaz d'échappement et d'un gaz d'admission
US20120073270A1 (en) Exhaust system and retrofitting method
CN103590881B (zh) 用于内燃发动机的管道系统
WO2008082465A1 (fr) Système de commande de moteur basé sur la charge en particules de suie
US7654079B2 (en) Diesel oxidation catalyst filter heating system
WO2002046586A1 (fr) Dispositif de regulation des gaz d'echappement pour moteurs a combustion interne
CN109804145A (zh) 用于再生颗粒过滤器的方法以及具有颗粒过滤器的汽车
US7278411B1 (en) Flow sensor
US7513108B2 (en) Regeneration strategy
JP4485400B2 (ja) 内燃機関の排気浄化装置
WO2008082464A1 (fr) Régénération de filtre utilisant une énergie ultrasonore
JP5033869B2 (ja) エミッション低減システム動作方法および装置
US20080295486A1 (en) Exhaust treatment system implementing temporary engine control
JP2004176636A (ja) 内燃機関の排気浄化装置
EP3692250B1 (fr) Procédé consistant à refroidir un composant, tel qu'un capteur, disposé à l'intérieur d'un compartiment d'un système de post-traitement des gaz d'échappement d'un véhicule
US20110047992A1 (en) Partial coating of platinum group metals on filter for increased soot mass limit and reduced costs

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200780040909.8

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07811238

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 1120070022027

Country of ref document: DE

RET De translation (de og part 6b)

Ref document number: 112007002202

Country of ref document: DE

Date of ref document: 20090709

Kind code of ref document: P

122 Ep: pct application non-entry in european phase

Ref document number: 07811238

Country of ref document: EP

Kind code of ref document: A1