WO2009150884A1 - 集塵フィルタの再生方法及びシステム - Google Patents
集塵フィルタの再生方法及びシステム Download PDFInfo
- Publication number
- WO2009150884A1 WO2009150884A1 PCT/JP2009/055987 JP2009055987W WO2009150884A1 WO 2009150884 A1 WO2009150884 A1 WO 2009150884A1 JP 2009055987 W JP2009055987 W JP 2009055987W WO 2009150884 A1 WO2009150884 A1 WO 2009150884A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dust collection
- collection filter
- turbine
- exhaust gas
- flow rate
- Prior art date
Links
- 239000000428 dust Substances 0.000 title claims abstract description 97
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims description 10
- 238000011069 regeneration method Methods 0.000 claims abstract description 41
- 230000008929 regeneration Effects 0.000 claims abstract description 38
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims description 23
- 230000001105 regulatory effect Effects 0.000 abstract 4
- 230000001276 controlling effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 70
- 239000000446 fuel Substances 0.000 description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 238000010586 diagram Methods 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 239000013618 particulate matter Substances 0.000 description 12
- 239000003054 catalyst Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
- B01D46/84—Chemical processes for the removal of the retained particles, e.g. by burning by heating only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—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
- F01N3/029—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 by adding non-fuel substances to exhaust
- F01N3/0293—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 by adding non-fuel substances to exhaust injecting substances in exhaust stream
- F01N3/0296—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 by adding non-fuel substances to exhaust injecting substances in exhaust stream having means for preheating additional substances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
- F01N3/32—Arrangements for supply of additional air using air pump
-
- 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
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/04—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
-
- 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
-
- 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
- F02B37/12—Control of the pumps
- F02B37/16—Control of the pumps by bypassing charging air
- F02B37/168—Control of the pumps by bypassing charging air into the exhaust conduit
-
- 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
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
-
- 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
- F02B37/12—Control of the pumps
- F02B37/24—Control of the pumps by using pumps or turbines with adjustable guide vanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2277/00—Filters specially adapted for separating dispersed particles from gases or vapours characterised by the position of the filter in relation to the gas stream
- B01D2277/20—Inclined, i.e. forming an angle of between 0° and 90°
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
-
- 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
- F01N2270/00—Mixing air with exhaust gases
-
- 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
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
-
- 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
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
- F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
-
- 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 invention relates to a method and system for regenerating a dust collection filter that removes particulate matter contained in exhaust gas, and more particularly, a method for regenerating a dust collection filter that regenerates a dust collection filter by burning the dust collection filter. And the system.
- Particulate Filter particulate filter
- PM particulate matter
- DPF Diesel Particulate Filter
- the temperature of the exhaust gas must be increased.
- a dust collection filter Particulate Filter
- the fuel supply amount to the engine is controlled so as to satisfy a predetermined air-fuel ratio for efficient operation of the engine. Therefore, it is difficult to increase the amount of heat of the exhaust gas at an arbitrary timing, and in general, the DPF is regenerated during high-load operation of the automobile.
- the method for regenerating a dust collection filter described in Patent Document 1 determines the fuel injection amount based on the target exhaust temperature, and adjusts the actual expansion ratio by the expansion ratio variable means to increase the temperature of the exhaust gas. Yes. By such an operation, the dust collection filter can be regenerated not only during high load operation of the automobile but also in a wide range of operation conditions.
- the method for regenerating a dust collection filter described in Patent Document 1 requires expansion ratio variable means for adjusting the actual expansion ratio of the engine, which complicates the apparatus and is difficult to control. .
- a supercharger is arranged on the upstream side of the dust collection filter, there is a problem that the exhaust gas is deprived of heat because work is carried out by the supercharger, resulting in poor efficiency.
- DPF combustion requires oxygen, if the fuel supply amount is increased without increasing the intake air amount supplied to the engine, the oxygen in the intake air is used for the combustion of the fuel. There is a problem that the amount of oxygen necessary for the combustion of the gas is insufficient.
- the present invention was devised in view of the above-described problems, and is a dust collection filter that can efficiently supply oxygen to the dust collection filter and can efficiently raise the temperature of the exhaust gas with a simple structure. It is an object to provide a reproduction method and system.
- the present invention relates to a dust collection filter that raises the temperature of exhaust gas and burns the collected matter of the dust collection filter during regeneration of the dust collection filter disposed in the exhaust passage of the internal combustion engine equipped with a supercharger.
- a first step of increasing the flow rate of compressed air regardless of the flow rate of exhaust gas flowing through the turbine of the supercharger, and a part of the compressed air to an intake air flow upstream of the internal combustion engine And a second step of bypassing the exhaust passage to the upstream side of the dust collecting filter from the passage.
- the third step is, for example, a step of opening a variable nozzle of a variable displacement supercharger or a step of opening a wastegate valve.
- the present invention provides a collector that raises the temperature of the exhaust gas and burns the collected matter of the dust collection filter at the regeneration timing of the dust collection filter disposed in the exhaust passage of the internal combustion engine provided with the supercharger.
- a dust filter regeneration system an intake air amount adjusting means capable of increasing a flow rate of compressed air regardless of a flow rate of exhaust gas flowing through the turbine of the supercharger, an intake air flow path upstream of the internal combustion engine, A bypass flow path connecting the exhaust flow path upstream of the dust collection filter, a flow rate adjusting valve for adjusting the flow rate of the bypass flow path, a control means for controlling the intake air amount adjusting means and the flow rate adjusting valve; It is characterized by having.
- the intake air amount adjusting means is, for example, an electric motor connected to the supercharger or an electric booster arranged on the upstream side of the supercharger. Moreover, it is preferable that the said bypass flow path is connected to the exhaust flow path immediately after the said internal combustion engine or just before the said dust collection filter.
- the supercharger has turbine flow adjusting means for adjusting a flow rate of exhaust gas flowing into the turbine, and the control means is configured to adjust the turbine flow adjusting means so that an energy loss of exhaust gas flowing through the turbine is reduced. May be adjusted.
- the turbine flow adjusting means is, for example, a variable nozzle or a waste gate valve, and the control means opens the variable nozzle or the waste gate valve.
- the flow rate of the compressed air is increased regardless of the flow rate of the exhaust gas flowing through the turbine of the supercharger, and a part of the compressed air is bypassed to the internal combustion engine.
- the oxygen supply amount to the dust collection filter can be increased, and the collected matter of the dust collection filter can be burned effectively.
- the unburned fuel can be burned and the amount of heat can be increased.
- the amount of work that the exhaust gas does in the turbine can be reduced, the loss of heat can be reduced, and the temperature of the exhaust gas can be increased efficiently. Can be made.
- the schematic block diagram which shows 1st embodiment of the regeneration system of the dust collection filter which concerns on this invention The schematic block diagram which shows 2nd embodiment of the regeneration system of the dust collection filter which concerns on this invention, The schematic block diagram which shows 3rd embodiment of the regeneration system of the dust collection filter which concerns on this invention, An enlarged view of the turbine flow adjusting means in the third embodiment, The schematic block diagram which shows 4th embodiment of the regeneration system of the dust collection filter which concerns on this invention, An enlarged view of the turbine flow adjusting means in the fourth embodiment, The schematic block diagram which shows 5th embodiment of the regeneration system of the dust collection filter which concerns on this invention, It is a schematic block diagram which shows 6th embodiment of the regeneration system of the dust collection filter which concerns on this invention.
- FIG. 1 is a schematic configuration diagram showing a first embodiment of a dust collection filter regeneration system according to the present invention.
- the regeneration system for the dust collection filter of the present invention shown in FIG. 1 is at the regeneration time of the dust collection filter (Particulate Filter) 4 arranged in the exhaust passage 3 of the engine (internal combustion engine) 2 provided with the supercharger 1.
- a regeneration system of the dust collection filter 4 that raises the temperature of the exhaust gas and burns the collected matter of the dust collection filter 4, and the flow rate of the compressed air regardless of the flow rate of the exhaust gas flowing through the turbine 1t of the supercharger 1
- Bypass flow connecting the electric motor 5 which is an intake air amount adjusting means capable of increasing the amount of intake gas, the intake passage on the upstream side of the engine 2 (engine intake passage 6e) and the exhaust passage 3 on the upstream side of the dust collecting filter 4 It has a flow path 7, a flow rate adjusting valve 8 that adjusts the flow rate of the bypass flow path 7, and a control means 9 that controls the electric motor 5 and the flow rate adjusting valve 8.
- the supercharger 1 is a device that recovers the energy of exhaust gas by the turbine 1t, operates the compressor 1c, and supplies compressed air to the engine 2 to increase the output.
- the compressor 1 c has an inlet side connected to an intake passage 6 that takes in external air, and an outlet side connected to an engine intake passage 6 e that supplies compressed air to the engine 2.
- An intercooler for cooling the compressed air may be disposed in the engine intake passage 6e.
- the turbine 1t has an inlet side connected to an engine exhaust passage 3e that supplies exhaust gas of the engine 2 and an outlet side connected to an exhaust passage 3 that discharges exhaust gas to the outside.
- the engine intake flow path 6 e is a part of the intake flow path 6, and the engine exhaust flow path 3 e is a part of the exhaust flow path 3.
- the supercharger 1 shown in FIG. 1 has an electric motor 5 that forcibly rotates the turbine 1t and the compressor 1c so that the supercharger 1 can be operated regardless of the flow rate of the exhaust gas flowing through the turbine 1t. It is configured. Therefore, when the supercharger 1 is forcibly driven by the electric motor 5, the flow rate of the compressed air can be increased by the action of the compressor 1c. Further, since the turbine 1t is forcibly rotated by the electric motor 5, the exhaust gas flowing through the turbine 1t does not work, so that loss of heat (exhaust gas energy) can be minimized.
- the engine 2 is, for example, a diesel engine or a gasoline engine mounted on an automobile or the like.
- the supply amount of compressed air and fuel is controlled in the engine 2 in accordance with the operation status. Such control is performed by an on-board electronic control unit (ECU).
- ECU electronice control unit
- the engine 2 is controlled by the air-fuel ratio (air mass / fuel mass). For example, during normal operation, the turbine 1t is driven by exhaust gas to drive the compressor 1c, the compressed air is supplied to the engine 2, and the fuel is supplied to the engine 2 so as to satisfy the output required value of the engine 2.
- the air-fuel ratio is controlled so that the air-fuel ratio is close to the stoichiometric air-fuel ratio (a state in which oxygen and fuel in the air react without excess or deficiency) in order to make the exhaust gas purification catalyst act effectively, In order to reduce harmful substances in the exhaust gas, the air-fuel ratio is controlled to be lower than the stoichiometric air-fuel ratio (economic air-fuel ratio).
- This electronic control unit also serves as the control means 9 in the reproduction system of the present invention.
- the dust collection filter 4 is, for example, a DPF used for a diesel engine vehicle.
- the dust collection filter 4 is a filter composed of ceramic or the like, and collects particulate matter (PM) in the exhaust gas.
- PM particulate matter
- the amount of fuel supplied to the engine 2 may be increased.
- oxygen is required for PM combustion, oxygen in the air is consumed by the combustion of the engine 2, so the oxygen concentration in the exhaust gas is lower than the oxygen concentration in the air. ineffective.
- the bypass flow path 7 is connected so that fresh air can be supplied to the dust collection filter 4.
- the pressure sensor 4s is arrange
- the bypass flow path 7 connects the engine intake flow path 6e and the exhaust flow path 3 and extracts the compressed air taken in by the compressor 1c before the engine 2 and bypasses it before the dust collection filter 4. Therefore, fresh air that is not burned by the engine 2 can be supplied to the dust collection filter 4.
- the amount of air to be bypassed is controlled by the flow rate adjustment valve 8.
- the flow rate adjusting valve 8 may be disposed in the middle of the bypass flow path 7, or may be disposed at a branch point with the engine intake flow path 6 e or a merge point with the exhaust flow path 3.
- an exhaust gas purification catalyst that removes harmful substances (mainly hydrocarbons, carbon monoxide, nitrogen oxides) contained in the exhaust gas may be disposed in the exhaust flow path 3.
- Such an exhaust gas purification catalyst is often arranged on the upstream side of the dust collection filter 4, and the junction of the bypass flow path 7 and the exhaust flow path 3 may be upstream of the exhaust gas purification catalyst. It may be downstream.
- control means 9 is the electronic control unit (ECU) described above.
- the control means 9 is electrically connected to the fuel supply means of the engine 2 and is configured to supply fuel to the engine 2 so that the engine 2 has a desired air-fuel ratio.
- the control means 9 is electrically connected to the electric motor 5 and is configured to be able to drive / stop / rotate the electric motor 5.
- the control means 9 is electrically connected to the flow rate adjusting valve 8 and is configured to control the opening / closing and the opening degree of the flow rate adjusting valve 8.
- the control means 9 is electrically connected to the pressure sensor 4 s of the dust collection filter 4 so that the regeneration timing and regeneration time of the dust collection filter 4 can be controlled by monitoring the back pressure of the dust collection filter 4. It is configured.
- the method for regenerating the dust collection filter 4 according to the present invention increases the temperature of the exhaust gas at the regeneration timing of the dust collection filter 4 disposed in the exhaust flow path 3 of the engine 2 provided with the supercharger 1.
- 4 is a regeneration method of the dust collection filter 4 for combusting the collected matter, the first step of increasing the flow rate of the compressed air regardless of the flow rate of the exhaust gas flowing through the turbine 1t of the supercharger 1, And a second step of bypassing the part from the intake passage on the upstream side of the engine 2 (engine intake passage 6e) to the exhaust passage 3 on the upstream side of the dust collection filter 4.
- the regeneration means of the dust collection filter 4 is determined by the control means 9 based on the output of the pressure sensor 4s arranged in the dust collection filter 4. Specifically, the control means 9 determines the regeneration timing of the dust collection filter 4 by comparing the pressure (back pressure) on the downstream side of the dust collection filter 4 with a predetermined threshold value.
- the pressure sensor 4s may be disposed in the exhaust flow path 3 on the downstream side of the dust collection filter 4, and the regeneration timing of the dust collection filter 4 may be determined based on the pressure on the downstream side of the dust collection filter 4. When the sensor 4s is not arranged, the regeneration timing of the dust collection filter 4 may be determined based on the usage time of the dust collection filter 4.
- the first step is a step of operating the electric motor 5 based on a command from the control means 9.
- the drive motor 5 is controlled so that the compressed air necessary for combustion of the engine 2 and the amount of compressed air that can secure oxygen necessary for combustion of the PM collected by the dust collection filter 4 can be sucked.
- the air-fuel ratio is controlled from the economic air-fuel ratio to the stoichiometric air-fuel ratio or fuel rich in order to increase the heat quantity of the exhaust gas. What is necessary is just to raise the upper limit of the fuel which can be supplied by switching to a different air fuel ratio or increasing the intake amount of the engine 2.
- the second step is a step for opening the flow rate adjusting valve 8 based on a command from the control means 9.
- a part of the compressed air can be bypassed from the engine intake passage 6e to the exhaust passage 3 upstream of the dust collection filter 4.
- the opening degree of the flow rate adjusting valve 8 is controlled so as to extract a quantity of compressed air that can secure oxygen necessary for combustion of PM collected by the dust collection filter 4. Since the pressure of the engine intake passage 6e is generally higher than the pressure of the exhaust passage 3, there is no need to arrange an intake device such as a pump. An intake device may be arranged to actively bypass the compressed air.
- FIG. 2 is a schematic configuration diagram showing a second embodiment of the regeneration system for the dust collection filter according to the present invention.
- FIG. 3 is a schematic configuration diagram showing a third embodiment of the dust collection filter regeneration system according to the present invention
- FIG. 4 is an enlarged view of the turbine flow adjusting means in the third embodiment
- FIG. 5 is a schematic configuration diagram showing a fourth embodiment of the dust collection filter regeneration system according to the present invention
- FIG. 6 is an enlarged view of the turbine flow adjusting means in the fourth embodiment.
- FIG. 7 is a schematic configuration diagram showing a fifth embodiment of the dust collection filter regeneration system according to the present invention
- FIG. 8 is a schematic configuration diagram showing the sixth embodiment.
- symbol is attached
- the outlet of the bypass passage 7 is connected to the engine exhaust passage 3e.
- the outlet portion of the bypass flow path 7 is preferably connected to the engine exhaust flow path 3e immediately after the engine 2.
- the unburned fuel in the engine exhaust flow path 3e can be burned, and the heat amount (exhaust gas energy) of the exhaust gas can be increased.
- the opening degree of the flow rate adjusting valve 8 is controlled in consideration of the consumed amount.
- the turbocharger 1 has a turbine flow adjusting means for adjusting the flow rate of the exhaust gas flowing into the turbine 1t, and the control means 9 controls the exhaust gas flowing through the turbine 1t.
- the turbine flow adjusting means is adjusted so that the energy loss is reduced.
- positioned as a turbine flow adjustment means is shown in figure. That is, the supercharger 1 constitutes a so-called variable capacity supercharger.
- the flow rate or flow rate of the exhaust gas supplied to the turbine 1t can be controlled by opening and closing the variable nozzle 1n, thereby controlling the flow rate of the compressed air supplied to the engine 2.
- variable nozzle 1n is meant to include all of the mechanisms that allow the supercharger 1 to be of a variable displacement type. For example, a flap type or a vane type exists. In FIG. 1, the open state of the variable nozzle 1n is shown.
- variable nozzle 1n is disposed between the turbine 1t and the engine exhaust passage 3e, and is disposed immediately before the inlet side of the turbine 1t.
- the variable nozzle 1n includes a vane 31 that is rotatably installed in the turbine housing.
- the vane 31 is closed as shown by a one-dot chain line in FIG.
- the vane 31 is opened as shown by the solid line in FIG.
- the vane 31 of the variable nozzle 1 n is actually in a state where the back side or the abdomen side of the vane 31 can be seen, but here, for convenience of explanation, the direction is changed so that the airfoil can be seen. ing.
- the turbocharger 1 has turbine flow adjusting means for adjusting the flow rate of the exhaust gas flowing into the turbine 1t, and the control means 9 controls the exhaust gas flowing through the turbine 1t.
- the turbine flow adjusting means is adjusted so that the energy loss is reduced.
- positioned as a turbine flow adjustment means is shown in figure.
- the wastegate valve 1w has a branch flow path 41 connected to the engine intake flow path 6e, and a bypass flow path 42 connected to the exhaust flow path 3 on the downstream side of the turbine 1t.
- the wastegate valve 1w opens the wastegate valve 1w when the pressure of the compressed air flowing through the engine intake passage 6e becomes too high, and sends the exhaust gas to bypass the turbine 1t.
- This is a device that reduces the pressure of the compressed air by reducing the intake flow rate of the compressor 1c.
- the waste gate valve 1w is opened and the exhaust gas is supplied so as to bypass the turbine 1t, the work amount of the turbine 1t is reduced. That is, even if the turbine 1t is forcibly driven at an arbitrary rotational speed by the electric motor 5 in this state, the driving of the turbine 1t does not cause any loss of exhaust gas energy.
- the wastegate valve 1w is electrically connected to an electronic control unit (ECU) that is the control means 9, and is configured to be able to control the opening and closing of the wastegate valve 1w.
- ECU electronice control unit
- the wastegate valve 1 w has an actuator 43 connected to the branch channel 41 and a valve body 44 that is opened and closed by the actuator 43.
- the actuator 43 causes the valve body 44 to be pressed against the engine exhaust flow path 3e, as shown by a one-dot chain line in FIG.
- the bypass channel 42 is closed.
- the actuator 43 is separated from the engine exhaust passage 3e in the actuator 43 as shown by a solid line in FIG. To switch to a state in which the bypass passage 42 is opened.
- the exhaust gas flowing through the engine exhaust flow path 3e can flow through the downstream exhaust flow path 3 by bypassing the turbine 1t, and the flow rate of the exhaust gas flowing through the turbine 1t can be reduced. It is possible to reduce the energy loss of the exhaust gas at. Therefore, when the wastegate valve 1w is opened, even if the turbine 1t is driven at an arbitrary rotational speed by the electric motor 5, there is little influence on the energy loss of the exhaust gas.
- an electric booster 51 disposed on the upstream side of the supercharger 1 is disposed as intake air amount adjusting means.
- the drive motor 5 shown in FIG. 1 is unnecessary, and the normal supercharger 1 that does not have the drive motor 5 as shown in FIG. 7 is used.
- the electric booster 51 includes a compressor 51c disposed in the intake passage 6 and an electric motor 51m connected to the compressor 51c.
- the electric motor 51m is electrically connected to the control means 9, and is configured to be able to drive / stop / rotate the electric motor 51m.
- the flow rate of the compressed air can be increased regardless of the flow rate of the exhaust gas flowing through the turbine 1t. Further, when the electric booster 51 is driven, the compressor 1c of the supercharger 1 can be forcibly driven by the compressed air taken in, and the turbine 1t can also be forcibly driven in conjunction with it. Therefore, the amount of work performed by the exhaust gas in the turbine 1t can be reduced, and loss of heat can be suppressed.
- the turbine 1t and the compressor 1c of the supercharger 1 are separated, the generator 1g is connected to the turbine 1t, and the electric motor 1m is connected to the compressor 1c. is there.
- the generator 1g and the electric motor 1m are connected to the storage battery 61, and are configured to store the electricity generated by the generator 1g in the storage battery 61 and supply the electricity of the storage battery 61 to the electric motor 1m. According to such a configuration, the flow rate of the compressed air can be increased by driving the compressor 1c by the electric motor 1m regardless of the flow rate of the exhaust gas flowing through the turbine 1t.
- connection position on the outlet side of the bypass flow path 7 may be changed as in the second embodiment.
- connection position on the outlet side of the bypass flow path 7 may be changed, or the embodiments may be appropriately combined. Of course, it is possible.
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Abstract
Description
Particulate Filter)と称する。かかるDPFにPMが一定量蓄積すると目詰まりを生じるため、排気ガスの温度を上昇させてPMを燃焼させることにより、DPFを再生している(例えば、特許文献1参照)。
特許文献1に記載された集塵フィルタの再生方法は、目標排気温度に基づいて燃料噴射量を決定し、膨張比可変手段によって実膨張比を調整することにより、排気ガスの温度を上昇させている。かかる操作により、自動車の高負荷運転時に限らず、広範囲の運転条件で集塵フィルタを再生できるようにしている。
本発明は上述した問題点に鑑み創案されたものであり、集塵フィルタに酸素を効率よく供給することができ、簡便な構造で効率よく排気ガスの温度を上昇させることができる集塵フィルタの再生方法及びシステムを提供することを目的とする。
さらに、前記タービンを流れる排気ガスのエネルギー損失が少なくなるように調整する第三ステップを追加してもよい。前記第三ステップは、例えば、可変容量式過給機の可変ノズルを開状態にするステップ又はウエストゲート弁を開状態にするステップである。
前記吸気量調整手段は、例えば、前記過給機に接続された電動モータ又は前記過給機の上流側に配置された電動ブースターである。また、前記バイパス流路は、前記内燃機関の直後又は前記集塵フィルタの直前の排気流路に接続されていることが好ましい。
また、タービンを流れる排気ガスのエネルギー損失が少なくなるように調整することにより、排気ガスがタービンで行なう仕事量を低減し、熱量の損失を低減することができ、効率よく排気ガスの温度を上昇させることができる。
図1に示した本発明の集塵フィルタの再生システムは、過給機1を備えたエンジン(内燃機関)2の排気流路3に配置された集塵フィルタ(Particulate Filter)4の再生時期に、排気ガスの温度を上昇させて集塵フィルタ4の捕集物を燃焼させる集塵フィルタ4の再生システムであり、過給機1のタービン1tを流れる排気ガスの流量に関係なく圧縮空気の流量を増大可能な吸気量調整手段である電動モータ5と、エンジン2の上流側の吸気流路(エンジン吸気流路6e)と集塵フィルタ4の上流側の排気流路3とを接続するバイパス流路7と、バイパス流路7の流量を調整する流量調整弁8と、電動モータ5及び流量調整弁8を制御する制御手段9と、を有する。
また、図1に示した過給機1は、タービン1t及びコンプレッサ1cを強制的に回転させる電動モータ5を有し、タービン1tを流れる排気ガスの流量に関係なく過給機1を作動できるように構成されている。したがって、電動モータ5により強制的に過給機1を駆動させると、コンプレッサ1cの作用により圧縮空気の流量を増大させることができる。また、タービン1tは、電気モータ5により強制的に回転されているため、タービン1tを流れる排気ガスは仕事をしないため、熱量(排気ガスエネルギー)の損失を最小限に抑制することができる。
集塵フィルタ4の再生時期は、集塵フィルタ4に配置された圧力センサ4sの出力に基づいて制御手段9が判断する。具体的には、制御手段9は、集塵フィルタ4の下流側の圧力(背圧)と所定の閾値とを比較して集塵フィルタ4の再生時期を判断する。なお、圧力センサ4sを集塵フィルタ4の下流側の排気流路3に配置して集塵フィルタ4の下流側の圧力に基づいて集塵フィルタ4の再生時期を判断してもよいし、圧力センサ4sが配置されていない場合には集塵フィルタ4の使用時間に基づいて集塵フィルタ4の再生時期を判断してもよい。
続いて、本発明に係る集塵フィルタ4の再生システムにおける他の実施形態について説明する。ここで、図2は本発明に係る集塵フィルタの再生システムの第二実施形態を示す概略構成図である。図3は本発明に係る集塵フィルタの再生システムの第三実施形態を示す概略構成図、図4は第三実施形態におけるタービン流調整手段の拡大図である。図5は本発明に係る集塵フィルタの再生システムの第四実施形態を示す概略構成図、図6は第四実施形態におけるタービン流調整手段の拡大図である。また、図7は本発明に係る集塵フィルタの再生システムの第五実施形態を示す概略構成図、図8は第六実施形態を示す概略構成図である。なお、各図において、第一実施形態と同じ構成部品については同じ符号を付し、重複した説明を省略する。
本発明は上述した実施形態に限定されず、例えば、第四実施形態及び第五実施形態において第二実施形態のようにバイパス流路7の出口側の接続位置を変更してもよい、第六実施形態において第一実施形態のようにバイパス流路7の出口側の接続位置を変更してもよい、各実施形態を適宜組み合わせてもよい等、本発明の趣旨を逸脱しない範囲で種々変更が可能であることは勿論である。
1t タービン
1c コンプレッサ
1m 電動モータ
1n 可変ノズル
1w ウエストゲート弁
1g 発電機
2 エンジン
3 排気流路
3e エンジン排気流路
4 集塵フィルタ
4s 圧力センサ
5 電動モータ
6 吸気流路
6e エンジン吸気流路
7 バイパス流路
8 流量調整弁
9 制御手段
31 ベーン
41 分流路
42 バイパス流路
43 アクチュエータ
44 弁体
51 電動ブースター
51c コンプレッサ
51m 電動モータ
61 蓄電池
Claims (8)
- 過給機を備えた内燃機関の排気流路に配置された集塵フィルタ(Particulate Filter)の再生時期に、排気ガスの温度を上昇させて前記集塵フィルタの捕集物を燃焼させる集塵フィルタの再生方法であって、
前記過給機のタービンを流れる排気ガスの流量に関係なく圧縮空気の流量を増大させる第一ステップと、前記圧縮空気の一部を前記内燃機関の上流側の吸気流路から前記集塵フィルタの上流側の前記排気流路にバイパスさせる第二ステップと、を有することを特徴とする。 - 請求項1に記載の集塵フィルタの再生方法であって、
前記タービンを流れる排気ガスのエネルギー損失が少なくなるように調整する第三ステップを有することを特徴とする。 - 請求項2に記載の集塵フィルタの再生方法であって、
前記第三ステップは、可変容量式過給機の可変ノズルを開状態にするステップ又はウエストゲート弁を開状態にするステップであることを特徴とする。 - 過給機を備えた内燃機関の排気流路に配置された集塵フィルタ(Particulate Filter)の再生時期に、排気ガスの温度を上昇させて前記集塵フィルタの捕集物を燃焼させる集塵フィルタの再生システムであって、
前記過給機のタービンを流れる排気ガスの流量に関係なく圧縮空気の流量を増大可能な吸気量調整手段と、前記内燃機関の上流側の吸気流路と前記集塵フィルタの上流側の前記排気流路とを接続するバイパス流路と、該バイパス流路の流量を調整する流量調整弁と、前記吸気量調整手段及び前記流量調整弁を制御する制御手段と、を有することを特徴とする。 - 請求項4に記載の集塵フィルタの再生システムであって、
前記吸気量調整手段は、前記過給機に接続された電動モータ又は前記過給機の上流側に配置された電動ブースターであることを特徴とする。 - 請求項4に記載の集塵フィルタの再生システムであって、
前記バイパス流路は、前記内燃機関の直後又は前記集塵フィルタの直前の排気流路に接続されていることを特徴とする。 - 請求項4に記載の集塵フィルタの再生システムであって、
前記過給機は、前記タービンに流入する排気ガスの流量を調整するタービン流調整手段を有し、前記制御手段は、前記タービンを流れる排気ガスのエネルギー損失が少なくなるように前記タービン流調整手段を調整することを特徴とする。 - 請求項7に記載の集塵フィルタの再生システムであって、
前記タービン流調整手段は可変ノズル又はウエストゲート弁であり、前記制御手段は可変ノズル又はウエストゲート弁を開状態にすることを特徴とする。
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- 2008-06-11 JP JP2008152872A patent/JP5293941B2/ja not_active Expired - Fee Related
-
2009
- 2009-03-25 WO PCT/JP2009/055987 patent/WO2009150884A1/ja active Application Filing
- 2009-03-25 EP EP09762315A patent/EP2309102A4/en not_active Withdrawn
- 2009-03-25 CN CN200980121300.2A patent/CN102057138B/zh not_active Expired - Fee Related
- 2009-03-25 US US12/993,902 patent/US20110146274A1/en not_active Abandoned
- 2009-03-25 KR KR1020107027359A patent/KR101293431B1/ko not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005220889A (ja) * | 2004-02-09 | 2005-08-18 | Toyota Motor Corp | 内燃機関用過給システム |
JP2006233803A (ja) * | 2005-02-23 | 2006-09-07 | Toyota Motor Corp | 電動機付き過給機を有する内燃機関 |
JP2006307811A (ja) * | 2005-05-02 | 2006-11-09 | Toyota Motor Corp | 内燃機関の二次空気供給装置 |
JP2008106687A (ja) | 2006-10-26 | 2008-05-08 | Nissan Motor Co Ltd | フィルタ再生装置 |
Non-Patent Citations (1)
Title |
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See also references of EP2309102A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10985608B2 (en) | 2016-12-13 | 2021-04-20 | General Electric Company | Back-up power system for a component and method of assembling same |
Also Published As
Publication number | Publication date |
---|---|
CN102057138A (zh) | 2011-05-11 |
JP5293941B2 (ja) | 2013-09-18 |
CN102057138B (zh) | 2014-05-21 |
KR20110004473A (ko) | 2011-01-13 |
JP2009299522A (ja) | 2009-12-24 |
EP2309102A4 (en) | 2012-05-02 |
US20110146274A1 (en) | 2011-06-23 |
KR101293431B1 (ko) | 2013-08-05 |
EP2309102A1 (en) | 2011-04-13 |
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