WO2005083242A1 - 内燃機関の排気浄化装置及び排気浄化方法 - Google Patents
内燃機関の排気浄化装置及び排気浄化方法 Download PDFInfo
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- WO2005083242A1 WO2005083242A1 PCT/JP2005/003144 JP2005003144W WO2005083242A1 WO 2005083242 A1 WO2005083242 A1 WO 2005083242A1 JP 2005003144 W JP2005003144 W JP 2005003144W WO 2005083242 A1 WO2005083242 A1 WO 2005083242A1
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- exhaust gas
- exhaust
- passage
- particulate filter
- temperature
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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
- F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
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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
- 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
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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
- 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
- F01N13/0093—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 the purifying devices are of the same type
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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
- 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
- F01N13/0097—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 the purifying devices are arranged in a single housing
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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
- F01N3/103—Oxidation catalysts for HC and CO only
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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
- F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
- F01N2410/04—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device during regeneration period, e.g. of particle filter
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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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/08—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by modifying ignition or injection timing
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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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/08—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by modifying ignition or injection timing
- F01N2430/085—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by modifying ignition or injection timing at least a part of the injection taking place during expansion or exhaust stroke
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- F01N3/023—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
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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
- F01N3/023—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
- F01N3/0231—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 special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
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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
- F01N3/023—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
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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
- F01N3/023—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
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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
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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
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
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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
- F01N3/2066—Selective catalytic reduction [SCR]
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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
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- 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
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
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- 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
Definitions
- the present invention relates to an exhaust gas purification device and an exhaust gas purification method for an internal combustion engine. Specifically, a particulate filter for removing particulate matter (PM) in exhaust gas and a reduction filter for purifying nitrogen oxides (NOx) in exhaust gas.
- the present invention relates to a technology for avoiding permanent thermal degradation of a reduction catalyst due to exhaust gas having passed through a particulate filter in an exhaust gas purification device including a catalyst.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-184542
- the thermal deterioration of the reduction catalyst is irreversible permanent deterioration.
- the fuel injection timing is adjusted to reduce exhaust gas. It is known that the deposited particulate matter is periodically incinerated by raising the temperature or heating with an electric heater or a parner to regenerate the particulate filter.
- the deterioration of the reduction catalyst due to the inflow of high-temperature exhaust gas is not limited to spontaneous combustion, but can also occur when the particulate matter force S on the particulate filter is burned by regeneration. [0004] It is an object of the present invention to avoid deterioration of a reduction catalyst due to inflow of high-temperature exhaust gas that has passed through a particulate filter.
- the present invention provides an exhaust gas purification device and an exhaust gas purification method for an internal combustion engine.
- the device according to the present invention is provided in an exhaust passage, a particulate filter for collecting particulate matter in exhaust gas, and in the exhaust passage, provided downstream of the particulate filter.
- a reduction catalyst that promotes the reduction of nitrogen oxides
- a bypass passage that branches the exhaust passage force downstream of the particulate filter, bypasses the reduction catalyst, and joins the exhaust passage downstream of the reduction catalyst;
- a flow path switching valve that switches a flow path of exhaust gas that has passed through the filter between the exhaust path and the bypass path, and a controller that controls the flow path switching valve in association with the temperature of exhaust gas that has passed through the particulate filter. It consists of.
- the method according to the present invention includes, in the exhaust passage of an internal combustion engine, installing a particulate filter and a reduction catalyst in order from the upstream, and exhausting the exhaust gas by binocing the reduction catalyst downstream of the particulate filter.
- the first operation in which the temperature of the exhaust gas passing through the particulate filter is relatively low, the exhaust gas passing through the particulate filter is caused to flow into the reduction catalyst, and the particulate matter in the exhaust gas is discharged. Is removed by the particulate filter and nitrogen oxides in the exhaust gas are purified by the reduction catalyst, while the temperature of the exhaust gas that has passed through the particulate filter increases in the second operation, which is higher than in the first operation.
- the exhaust gas that has passed through the particulate filter is caused to flow into the bypass passage to bypass the reduction catalyst.
- the flow path switching valve is controlled in association with the temperature of the exhaust gas passing through the particulate filter, and the flow path of the exhaust gas is switched between the exhaust passage and the bypass passage.
- the high-temperature exhaust gas that has passed through the particulate filter is bypassed by the binos passage, and deterioration of the reduction catalyst can be avoided.
- FIG. 1 shows a configuration of an exhaust gas purifying apparatus for an internal combustion engine according to a first embodiment of the present invention.
- FIG. 2 is a flowchart of an exhaust bypass routine according to the embodiment.
- FIG. 3 An explanation of the operation of the exhaust bypass controller according to the embodiment.
- FIG. 4 is a flowchart of an exhaust bypass routine according to a second embodiment of the present invention.
- FIG. 5 is a flowchart of an exhaust bypass routine according to a third embodiment of the present invention.
- FIG. 1 shows a configuration of an internal combustion engine 1 according to a first embodiment of the present invention.
- a diesel engine hereinafter, referred to as “engine”
- turbocharger 2 is employed as the internal combustion engine 1.
- an air cleaner 4 is attached to an introduction portion of the intake passage 3, and dust in the air taken in by the air cleaner 4 is removed. Downstream of the air cleaner 4, a compressor 2a of the turbocharger 2 is installed, and the compressor 2a compresses and sends out the air. The sent-out air is cooled by an intercooler 5 installed downstream, and then distributed to each cylinder by a mar-holder 3a.
- the engine 1 is a direct injection type diesel engine, and an injector 6 for supplying fuel is provided for each cylinder. Fuel is directly injected into the cylinder by the injector 6.
- the turbocharger 2 A turbine 2b is provided, and the turbine 2b is driven by exhaust gas discharged from the cylinder, and operates a compressor 2a coaxially coupled to the turbine 2b.
- a diesel particulate filter 8 Downstream of the turbine 2b, a diesel particulate filter 8 is installed as a ⁇ particulate filter '' that traps particulate matter in the exhaust gas.Further downstream, it promotes the reduction of NOx in the exhaust gas A reduction catalyst 9 is installed.
- a diesel particulate filter having a continuous regeneration function hereinafter referred to as “continuous regeneration DPF”) is employed as the diesel particulate filter 8.
- the continuous regeneration DPF 8 is configured to include a filter element 82 for trapping particulate matter, and an oxidation catalyst 81 arranged upstream of the filter element 82. Nitrogen monoxide in the exhaust gas is oxidized by the oxidation catalyst 81 to generate nitrogen dioxide, and the particulate matter on the filter element 82 is converted into carbon dioxide by the generated nitrogen oxide. . That is, the continuous regeneration DPF 8 can remove the particulate matter from the exhaust gas while continuously burning the accumulated particulate matter to regenerate the continuous regeneration DPF 8. In addition, a filter regeneration device is provided for regeneration when the exhaust gas has a low temperature, for example, in a traffic jam.
- This filter regeneration device increases the amount of nitrogen dioxide by increasing the exhaust gas temperature by delaying the fuel injection timing by the injector 6 and activating the oxidation catalyst 81, thereby increasing the amount of generated nitrogen dioxide. Forcibly burn the particulate matter.
- the function as a “filter regeneration device” is provided to the engine controller 101! /.
- a reducing agent addition device 10 Downstream of the continuous regeneration DPF 8, a reducing agent addition device 10 is provided.
- the reducing agent-added caro unit 10 adds urea water as a NOx reducing agent to exhaust gas flowing into the reduction catalyst 9, and includes an injection nozzle 10a.
- the injection nozzle 10a is inserted into the exhaust passage 7 through the pipe wall of the exhaust passage 7.
- the reducing agent adding device 10 has a built-in pump, draws in urea water from a storage tank 11, and adds it to exhaust gas by an injection nozzle 10a.
- the built-in pump of the reducing agent addition device 10 is controlled by a signal from the reducing agent addition controller 201 to add a predetermined amount of urea water.
- the reducing agent addition controller 201 inputs the operating state of the engine 1 from the engine controller 101, and controls the amount of urea water addition based on the input operating state.
- the added urea water is hydrolyzed by the heat of the exhaust gas to generate ammonia, and the generated ammonia and NOx in the exhaust gas are returned. It reacts on the main catalyst 9 to purify NOx.
- a bypass passage 12 that bypasses the reduction catalyst 9 is provided downstream of the continuous regeneration DPF 8.
- the bypass passage 12 is connected to the exhaust passage 7 upstream and downstream of the reduction catalyst 9, branches off from the exhaust passage 7 upstream of the reduction catalyst 9 and the injection nozzle 10 a, bypasses the reduction catalyst 9, An exhaust passage that joins the exhaust passage 7 downstream of the reduction catalyst 9 is formed.
- a first switching valve 13 as a "flow path switching valve” is installed at a branch point between the exhaust passage 7 and the bypass passage 12, and a "flow path shut-off valve” at the junction of the exhaust passage 7 and the binos passage 12.
- the second switching valve 14 is provided.
- the first and second switching valves 13, 14 switch the flow path of the exhaust gas that has passed through the continuous regeneration DPF 8 between the exhaust passage 7 and the bypass passage 12.
- the first and second switching valves 13 and 14 are activated by a signal from the exhaust bypass controller 301. That is, the first and second switching valves 13 and 14 allow the exhaust gas to flow into the reduction catalyst 9 according to the off signal from the exhaust bypass controller 301, and switch the exhaust flow path to the bypass passage 12 according to the on signal.
- the reduction catalyst 9 is bypassed.
- the exhaust bypass controller 301 outputs a signal to the reducing agent addition controller 201 to stop the addition of urea water.
- the “flow path cutoff valve” blocks the flow of exhaust gas
- the second switching valve 14 for selectively setting the flow path of exhaust gas has this function.
- a temperature sensor 15 for detecting the temperature of the exhaust gas that has passed through the continuous regeneration DPF 8 is provided in the exhaust passage 7, upstream of the reduction catalyst 9, a temperature sensor 15 for detecting the temperature of the exhaust gas that has passed through the continuous regeneration DPF 8 is provided.
- the temperature sensor 15 is installed in the housing of the filter element 82 (and the oxidation catalyst 81) of the continuous regeneration DPF 8.
- the detection signal of the temperature sensor 15 is input to the exhaust bypass controller 301, and is reflected in the control of the first and second switching valves 13, 14.
- FIG. 2 is a flowchart of an exhaust bypass routine.
- the exhaust bypass controller 301 is activated by turning on a power switch such as a key switch, and starts control.
- the exhaust nopath controller 301 repeatedly executes this routine at predetermined time intervals.
- S101 the exhaust temperature Texh detected by the temperature sensor 15 is read.
- S102 it is determined whether or not the value of the state determination flag FLG1 is 0. When it is 0, the process proceeds to S103, and when it is not 0, the process proceeds to S107.
- the state determination flag FLG1 is set to 0 or 1 in this routine, is set to 0 when the exhaust passage 7 is selected as the exhaust passage, and when the bypass passage 12 is selected. Is set to 1.
- the read exhaust temperature Texh is equal to or higher than a first temperature T1 set as a relatively high temperature. If it is not less than T1, the process proceeds to S104, and if it is less than T1, this routine ends.
- the first temperature T1 is set as high as possible as an exhaust temperature within a range that does not cause deterioration of the reduction catalyst 9. This is to minimize the emission of NOx by bypassing the reduction catalyst 9.
- an ON signal is output to the first and second switching valves 13 and 14, and the flow path of the exhaust gas that has passed through the continuous regeneration DPF 8 is switched to the bypass passage 12, and the reduction catalyst 9 is bypassed.
- an off signal is output to the first and second switching valves 13 and 14 to return the flow path of the exhaust gas that has passed the continuous regeneration DPF 8 to the exhaust passage 7, and the exhaust gas flows into the reduction catalyst 9. Let it.
- the exhaust gas passes through the continuous regeneration DPF 8 and then flows into the reduction catalyst 9 via the exhaust passage 7.
- the continuous regeneration DPF 8 the particulate matter is removed from the exhaust gas by the filter element 82, and the particulate matter on the filter element 82 is continuously treated based on the function of the oxidation catalyst 81.
- Exhaust bypass The controller 301 reads the temperature Texh of the exhaust gas that has passed through the continuous regeneration DPF 8 and keeps the first and second switching valves 13 and 14 in the off state until the temperature reaches the first temperature T1.
- the exhaust gas that has passed through is made to flow into the reduction catalyst 9.
- NOx in the exhaust gas is efficiently converted on the reduction catalyst 9. It is reduced and purified.
- the exhaust temperature Texh increases under the same operation request for the engine 1 (for example, determined as a required load for each rotation speed). Then, when the temperature reaches the first temperature T1 (time tl), the exhaust no-path controller 301 outputs an ON signal to the first and second switching valves 13 and 14 to output the exhaust gas passing through the continuous regeneration DPF 8. Into the bypass passage 12 to bypass the reduction catalyst 9.
- the first temperature T1 as high as possible within a range that does not cause the deterioration of the reduction catalyst 9
- the exhaust bypass controller 301 is provided with a reducing agent. A signal is output to the addition controller 201 to stop the addition of urea water.
- the exhaust bypass controller 301 When the exhaust gas temperature Texh drops and reaches the second temperature T2 (time t2), the exhaust bypass controller 301 outputs an off signal to the first and second switching valves 13, 14, and outputs The flow path is set in the exhaust passage 7, and the exhaust gas that has passed through the continuous regeneration DPF 8 flows into the reduction catalyst 9 again, and a signal is output to the reducing agent addition device 10 to restart the addition of the urea water.
- a bypass passage 12 is provided downstream of the continuous regeneration DPF 8, and when the temperature Texh of the exhaust gas passing through the continuous regeneration DPF 8 rises and reaches the first temperature T1, the exhaust gas flow path is bypassed. To the exhaust passage 12, and the reduction catalyst 9 is bypassed. Therefore, deterioration of the reduction catalyst 9 due to the inflow of high-temperature exhaust gas can be avoided.
- a second switching valve 14 is installed at a junction of the bypass passage 12 and the exhaust passage 7, and the first and second switching valves 13 and 14 are operated in synchronization with each other, so that the exhaust gas flows. The road was changed. For this reason, at the time of exhaust binos, backflow of the exhaust gas that has passed through the binos passage 12 to the reduction catalyst 9 can be prevented.
- FIG. 4 is a flowchart of an exhaust bypass routine according to the second embodiment of the present invention. This routine is executed when the power switch is turned on, as in the first embodiment. It is repeated every predetermined time.
- the configuration of the internal combustion engine according to the present embodiment and a third embodiment described later is the same as that of the first embodiment, except that the continuous regeneration DPF 8 and the reduction catalyst 9 are installed in the exhaust passage 7. It uses an injection type diesel engine1.
- the operation determination flag FLG2 is read.
- the operation determination flag FLG2 indicates whether or not there is a certain power during the forced regeneration of the continuous regeneration DPF8 performed by delaying the fuel injection timing, and is set to 0 or 1 by the engine controller 101, and is set to the exhaust bypass controller 301. Is output.
- the operation determination flag FLG2 is set to 1 during forced regeneration, and is set to 0 during normal times other than during forced regeneration.
- an ON signal is output to the first and second switching valves 13 and 14 to switch the flow path of the exhaust gas that has passed through the continuous regeneration DPF 8 to the bypass passage 12.
- the process proceeds to S117, and if it is higher than T2, this routine ends. That is, when the forced regeneration performed by delaying the fuel injection timing is completed and the exhaust gas temperature Texh is sufficiently reduced, the processing in steps S117 and thereafter is performed. is there.
- the predetermined temperature T3 corresponds to the “third temperature”, and may be set as the upper limit temperature of the range without causing deterioration of the reduction catalyst 9, or may be set to a value higher than the predetermined temperature. Set as low and temperature.
- the flow path of the exhaust gas is switched to the bypass passage 12, and the reduction catalyst 12 is bypassed. For this reason, it is possible to prevent the high-temperature exhaust gas from flowing into the reduction catalyst 9 from the continuous regeneration DPF 8 by the forced regeneration performed by delaying the fuel injection timing, thereby preventing the reduction catalyst 9 from deteriorating.
- the exhaust gas flow path is returned after waiting for the exhaust temperature Texh to decrease. This can prevent the reduction catalyst 9 from deteriorating.
- FIG. 5 is a flowchart of an exhaust bypass routine according to the third embodiment of the present invention. This routine is also executed when the power switch is turned on, and is repeated every predetermined time.
- the exhaust bypass controller 301 according to the present embodiment is provided with a timer, and the timer measures the elapsed time TIM after the end of the regeneration.
- the value of the timer is held at 0 (S121).
- the process proceeds to S122, and the processing in the following steps is executed.
- the timer value TIM is read as the elapsed time after the end of the reproduction.
- the continuous regeneration DPF8 is forcibly regenerated by raising the temperature of the exhaust gas at the time of discharge from the cylinder, or by heating the filter element 82 or the exhaust gas flowing into the filter element 82 by an electric heater or a parner. It may be possible to depend on things.
- the particulate filter is not limited to the continuous regeneration type, and the amount of accumulated particulates is estimated based on the traveling distance and the like, and the estimated amount of accumulated particulates reaches a predetermined amount. At times, a type in which regeneration is performed by adjusting fuel injection timing or the like may be adopted.
- the present invention can also be applied to an exhaust purification device for a diesel engine other than the direct injection type.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Biomedical Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05719545.5A EP1722078B1 (en) | 2004-03-02 | 2005-02-25 | Exhaust emission purifying apparatus and method for an internal combustion engine |
US11/512,379 US7614218B2 (en) | 2004-03-02 | 2006-08-30 | Exhaust emission purifying apparatus for and exhaust emission purifying method of internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-058066 | 2004-03-02 | ||
JP2004058066A JP4290037B2 (ja) | 2004-03-02 | 2004-03-02 | エンジンの排気浄化装置 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/512,379 Continuation US7614218B2 (en) | 2004-03-02 | 2006-08-30 | Exhaust emission purifying apparatus for and exhaust emission purifying method of internal combustion engine |
Publications (1)
Publication Number | Publication Date |
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WO2005083242A1 true WO2005083242A1 (ja) | 2005-09-09 |
Family
ID=34909092
Family Applications (1)
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PCT/JP2005/003144 WO2005083242A1 (ja) | 2004-03-02 | 2005-02-25 | 内燃機関の排気浄化装置及び排気浄化方法 |
Country Status (4)
Country | Link |
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US (1) | US7614218B2 (ja) |
EP (1) | EP1722078B1 (ja) |
JP (1) | JP4290037B2 (ja) |
WO (1) | WO2005083242A1 (ja) |
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JP2006342734A (ja) * | 2005-06-09 | 2006-12-21 | Mitsubishi Fuso Truck & Bus Corp | 排気浄化装置 |
JP4592504B2 (ja) * | 2005-06-09 | 2010-12-01 | 三菱ふそうトラック・バス株式会社 | 排気浄化装置 |
GB2570507A (en) * | 2018-01-30 | 2019-07-31 | Jaguar Land Rover Ltd | Fluid flow network for a vehicle |
GB2570507B (en) * | 2018-01-30 | 2020-05-06 | Jaguar Land Rover Ltd | Fluid flow network for a vehicle |
US10920643B2 (en) | 2018-01-30 | 2021-02-16 | Jaguar Land Rover Limited | Fluid flow network for a vehicle including flow members that respond to a flow imbalance |
Also Published As
Publication number | Publication date |
---|---|
EP1722078A1 (en) | 2006-11-15 |
US7614218B2 (en) | 2009-11-10 |
EP1722078B1 (en) | 2013-05-22 |
JP2005248765A (ja) | 2005-09-15 |
JP4290037B2 (ja) | 2009-07-01 |
EP1722078A4 (en) | 2010-12-08 |
US20060283178A1 (en) | 2006-12-21 |
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