US20110185710A1 - Exhaust gas purifying device for internal combustion engine, and swirl generating device - Google Patents
Exhaust gas purifying device for internal combustion engine, and swirl generating device Download PDFInfo
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- US20110185710A1 US20110185710A1 US13/063,039 US200913063039A US2011185710A1 US 20110185710 A1 US20110185710 A1 US 20110185710A1 US 200913063039 A US200913063039 A US 200913063039A US 2011185710 A1 US2011185710 A1 US 2011185710A1
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- swirl generating
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 34
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- 238000011144 upstream manufacturing Methods 0.000 claims description 34
- 238000005206 flow analysis Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 5
- 238000012790 confirmation Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 235000006716 Broussonetia kazinoki Nutrition 0.000 description 2
- 240000006248 Broussonetia kazinoki Species 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000126 substance Substances 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
- B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
- B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
- B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4315—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
- B01F25/43162—Assembled flat elements
-
- 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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/086—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling having means to impart whirling motion to the gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
- B01F25/431974—Support members, e.g. tubular collars, with projecting baffles fitted inside the mixing tube or adjacent to the inner wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
- B04C2003/006—Construction of elements by which the vortex flow is generated or degenerated
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
Definitions
- the present invention relates to an exhaust gas purifying device for an internal combustion engine and a swirl generating device.
- An exhaust gas purifying device for an internal combustion engine is a device for purifying exhaust gas exhausted from the internal combustion engine.
- a known device of this type includes an exhaust pipe through which exhaust gas exhausted from the internal combustion engine flows, a reduction catalyst provided in the exhaust pipe and reducing and purifying oxynitride contained in the exhaust gas, reducing agent supply means for supplying a reducing agent by injecting it into the exhaust gas flowing upstream of the reduction catalyst, and swirl generating means provided upstream of the reduction catalyst in the exhaust pipe and generating a swirl in the exhaust gas (see Japanese Patent Laid-Open No. 2006-29233, for example).
- FIG. 8 shows an exemplary exhaust gas purifying device for an internal combustion engine according to the related art.
- FIG. 8( a ) is a schematic view of the exhaust gas purifying device
- FIG. 8( b ) is an enlarged perspective view of a key portion V shown in FIG. 8( a ).
- an exhaust gas purifying device 10 for an internal combustion engine includes an exhaust pipe 1 , a reduction catalyst 2 , a reducing agent injection nozzle 3 that supplies a reducing agent (such as urea solution) by injecting it into exhaust gas flowing upstream of the reduction catalyst 2 , and swirl generating means 4 for generating a swirl in the exhaust gas and provided upstream of the reduction catalyst 2 in the exhaust pipe 1 (specifically, upstream of a location where the reducing agent is sprayed into the exhaust gas through the reducing agent injection nozzle 3 (see “reducing agent sprayed portion” in FIG. 8( a )).
- the swirl generating means 4 is a finned structure including columns 41 and blades 42 and generating turbulence or swirl in the exhaust gas to facilitate diffusion of the reducing agent in the exhaust gas.
- the swirl generating means 4 generates turbulence or swirl in the exhaust gas to facilitate diffusion of the reducing agent in the exhaust gas.
- the reducing agent can be uniformly supplied to the reduction catalyst 2 , whereby exhaust gas purifying performance can be ensured at a certain level or higher.
- a swirl force created by the swirl generating means 4 can be increased, the reducing agent can be more uniformly supplied to the reduction catalyst, whereby the exhaust gas purifying performance can be improved.
- the swirl force created by the swirl generating means 4 is therefore desirably improved.
- the swirl generating means 4 therefore needs to have a certain magnitude of strength. If the resistance produced by the swirl generating means 4 can be reduced, not only can the strength required for the swirl generating means 4 be reduced, but also the fuel consumption of the internal combustion engine can be improved. The resistance produced by the swirl generating means 4 is therefore desirably reduced.
- the present invention provides an exhaust gas purifying device for an internal combustion engine including an exhaust pipe through which exhaust gas exhausted from the internal combustion engine flows, a reduction catalyst provided in the exhaust pipe and reducing and purifying an oxynitride contained in the exhaust gas, reducing agent supply means for supplying a reducing agent by injecting the reducing agent into the exhaust gas flowing upstream of the reduction catalyst, and swirl generating means provided upstream of the reduction catalyst in the exhaust pipe and generating a swirl in the exhaust gas.
- the swirl generating means has two blades formed by halving a substantially elliptic plate along the direction of a major axis thereof.
- the two blades are so integrated together that the blades are rotated relative to each other about a minor axis of the plate so as to cross each other.
- Let ⁇ be a crossing angle between the two blades integrated as described above, and an angle expressed by 90- ⁇ 1/2 is called a fin angle.
- the two blades are so mounted that the direction of the major axis is parallel to the direction in which the exhaust gas flows.
- the present invention further provides swirl generating means provided in an exhaust pipe having two blades formed by halving a substantially elliptic plate along the direction of a major axis thereof.
- the two blades are so integrated together that the blades are rotated relative to each other about a minor axis of the plate so as to cross each other, and the two blades are so mounted that the direction of the major axis is parallel to the direction in which the exhaust gas flows.
- At least one of the two blades described above is desirably so configured that an arcuate portion of an outer edge of the blade is in contact with an inner wall of the exhaust pipe.
- both the two blades are more desirably so configured that the arcuate portions of the outer edges of the blades are in contact with the inner wall of the exhaust pipe.
- At least one of the two blades is desirably so configured that both ends thereof in the direction of the major axis are cut in the direction parallel to the minor axis.
- both the two blades are desirably so configured that both ends thereof in the direction of the major axis are cut in the direction parallel to the minor axis.
- the two blades are so configured that both ends thereof in the direction of the major axis are integrated together by connecting portions, and that one of the connecting portions, the connecting portion disposed on the upstream side in the exhaust pipe, is configured to connect upstream ends of the two blades with each other.
- FIG. 1 shows a key portion of an exhaust gas purifying device for an internal combustion engine according to an embodiment of the present invention.
- FIG. 2 shows swirl generating means viewed from several directions (A to D) shown in FIG. 1 .
- FIG. 3 is a table showing comparison between the swirl generating means of the present invention and swirl generating means of related art in terms of the magnitudes of swirl force and resistance for fin specifications (I to III).
- FIG. 4 shows a flow analysis result (flow line) for the fin specifications.
- FIG. 5 shows a flow analysis result (swirl force) for the fin specifications.
- FIG. 6 shows a flow analysis result (resistance) for the fin specifications.
- FIG. 7 shows a flow analysis result (flow speed) for the fin specifications.
- FIG. 8 shows an exemplary exhaust gas purifying device for internal combustion engine according to related art.
- FIGS. 9( a ) and 9 ( b ) show swirl generating means 50 disposed in an exhaust pipe 1 and viewed from various angles.
- FIGS. 10( a ) to 10 ( c ) show the swirl generating means 50 viewed from directions E to G shown in FIG. 9 .
- FIG. 11 shows exhaust gas flowing through the exhaust pipe 1 in which the swirl generating means 50 is disposed, the exhaust gas monitored with “EFD V5”.
- FIGS. 12( a ) and 12 ( b ) show swirl generating means 60 disposed in the exhaust pipe 1 and viewed from various angles.
- FIGS. 13( a ) to 13 ( c ) show the swirl generating means 60 viewed from directions H to J shown in FIG. 12 .
- FIG. 14 shows exhaust gas flowing through the exhaust pipe 1 in which the swirl generating means 60 is disposed, the exhaust gas monitored with “EFD V5”.
- FIG. 15 shows the relationship between a fin angle and a swirl force.
- FIG. 16 shows the relationship between the fin angle and pressure loss.
- FIG. 1 shows a key portion of an exhaust gas purifying device for an internal combustion engine according to an embodiment of the present invention.
- FIG. 2 shows swirl generating means 40 viewed from several directions (A to D) shown in FIG. 1 .
- FIGS. 2(A) to 2(D) correspond to those of the swirl generating means 40 viewed from the directions A to D shown in FIG. 1 , respectively.
- the same portions as those in FIG. 8 have the same reference characters.
- an exhaust gas purifying device 100 for an internal combustion engine includes the swirl generating means 40 in an exhaust pipe 1 .
- the swirl generating means 40 has two blades 410 and 420 formed by halving a substantially elliptic plate along the direction of the major axis thereof.
- the two blades 410 and 420 are so integrated together via connecting portions 431 and 432 that the two blades are rotated relative to each other about the minor axis (hereinafter also referred to as a central axis) of the plate so as to cross each other, and the two blades 410 and 420 are so mounted that the direction of the major axis is parallel to the direction in which the exhaust gas flows.
- the blades 410 and 420 are so configured that arcuate portions 410 a and 420 a of outer edges of the blades are in contact with the inner wall of the exhaust pipe 1 .
- the two blades 410 and 420 which form the swirl generating means 40 , produce a double spiral swirl in the exhaust gas flowing through the exhaust pipe 1 .
- the exhaust gas purifying device 100 for an internal combustion engine can create a strong swirl force.
- the blades 410 and 420 have a structure to which the exhaust gas applies less resistance, the double spiral swirl flows smoothly along the wall surfaces of the blades 410 and 420 . As a result, the resistance produced in the exhaust gas purifying device 100 for an internal combustion engine decreases.
- the swirl generating means 40 is disposed upstream of a reducing agent sprayed portion (see FIG. 8 ).
- the present invention is, however, not limited to the embodiment shown in FIG. 1 , and the swirl generating means 40 may be disposed downstream of the reducing agent sprayed portion as long as being disposed upstream of the reduction catalyst 2 .
- FIG. 3 is a table showing comparison between the swirl generating means of the present invention (see “inventive proposal” in FIG. 3 ) and the swirl generating means of the related art (see “related art structures 1 and 2 ” in FIG. 3 ) in terms of the magnitudes of the swirl force and the resistance for fin specifications (I to III).
- FIGS. 4 to 7 show flow analysis results for the fin specifications shown in FIG. 3 .
- FIG. 4 shows flow lines.
- FIG. 5 shows the swirl force.
- FIG. 6 shows the resistance.
- FIG. 7 shows the flow speed. It is noted that FIG. 6 shows flow analysis results (resistance) only for the fin specifications I and II out of the fin specifications I to III shown in FIG. 3 but does not shows a flow analysis result (resistance) for the fin specification III.
- the inventive proposal shows a large swirl force of 2.2 revolutions and a low resistance of 3.2 kPa.
- the related art structure 1 shows a large swirl force of 2.1 revolutions, which is similar to the magnitude of the swirl force provided in the inventive proposal, but a significantly high resistance of 65.1 kPa.
- the related art structure 2 shows a low resistance of 3.2 kPa, which is the same as the magnitude of the resistance provided in the inventive proposal, but a significantly small swirl force of 0.5 revolutions.
- the flow analysis results shown in FIGS. 4 to 7 indicate that the inventive proposal achieves a large swirl force and low resistance at the same time unlike the related art structures 1 and 2 .
- the exhaust gas purifying device 100 for an internal combustion engine advantageously provides a stronger swirl force and lower resistance than the exhaust gas purifying device 10 for an internal combustion engine of the related art (see FIG. 8 ).
- swirl generating means 40 as the swirl generating means, but instead of or in addition to the swirl generating means 40 , swirl generating means 50 shown in FIGS. 9 to 11 or swirl generating means 60 shown in FIGS. 12 to 14 may be used.
- the swirl generating means 50 and the swirl generating means 60 will be described below.
- FIG. 11 shows the exhaust gas flowing through the exhaust pipe 1 in which the swirl generating means 50 is disposed, the exhaust gas monitored with “EFD V5” (manufactured by “KOZO KEIKAKU ENGINEERING Inc.”).
- the swirl generating means 50 has two blades 510 and 520 formed by halving a substantially elliptic plate along the direction of the major axis thereof.
- the two blades 510 and 520 are so integrated together that they are rotated relative to each other about the minor axis (hereinafter also referred to as a central axis) of the plate so as to cross each other, and the two blades 510 and 520 are so mounted in the exhaust pipe 1 that the direction of the major axis is parallel to the direction in which the exhaust gas flows.
- the blades 510 and 520 are so configured that arcuate portions 510 a and 520 a of outer edges of the blades are in contact with the inner wall of the exhaust pipe 1 .
- the two blades 510 and 520 are also so configured that both ends thereof in the direction of the major axis (specifically, an upstream end 510 b of the blade 510 , a downstream end 510 c of the blade 510 , an upstream end 520 b of the blade 520 , and a downstream end 520 c of the blade 520 ) are cut in the direction parallel to the minor axis.
- the two blades 510 and 520 are so integrated together on both sides thereof in the direction of the major axis by connecting portions 531 and 532 .
- One of the connecting portions 531 and 532 is configured to connect downstream portions of the two blades 510 and 520 . More specifically, the connecting portion 531 is configured to connect downstream portions of the two blades 510 and 520 with each other in a region upstream of the downstream ends 510 c and 520 c of the two blades 510 and 520 (that is, a region between the downstream ends 510 c, 520 c and the central axis described above).
- the connecting portion 532 disposed on the upstream side in the exhaust pipe 1 is configured to connect upstream portions of the two blades 510 and 520 .
- the connecting portion 532 is configured to connect the upstream ends 510 b and 520 b of the two blades 510 and 520 with each other.
- the connecting portion 532 has a larger width in the direction in which the exhaust gas flows than that of the connecting portion 531 .
- the swirl generating means 50 when the swirl generating means 50 is disposed in the exhaust pipe 1 , the swirl force of the exhaust gas becomes strong.
- the flow rate of the exhaust gas was 1200 kg/h; the temperature of the exhaust gas was 520° C.; and the fin angle was 52.5°.
- the pressure loss under these conditions was 12.998 kPa.
- the resistance applied to the exhaust gas also decreases.
- FIG. 14 shows the exhaust gas flowing through the exhaust pipe 1 in which the swirl generating means 60 is disposed, the exhaust gas monitored with “EFD V5” (manufactured by “KOZO KEIKAKU ENGINEERING Inc.”).
- the swirl generating means 60 has substantially the same configuration as that of the swirl generating means 50 .
- the swirl generating means 60 has two blades 610 and 620 formed by halving a substantially elliptic plate along the direction of the major axis thereof.
- the two blades 610 and 620 are so integrated together that the they are rotated relative to each other about the minor axis (hereinafter also referred to as a central axis) of the plate so as to cross each other, and the two blades are so mounted in the exhaust pipe 1 that the direction of the major axis is parallel to the direction in which the exhaust gas flows.
- the two blades 610 and 620 are so configured that arcuate portions 610 a and 620 a of outer edges of the blades are in contact with the inner wall of the exhaust pipe 1 , as in the case of the two blades 510 and 520 .
- the swirl generating means 60 is, as in substantially the same manner as the swirl generating means 50 , further so configured that both ends thereof in the direction of the major axis (specifically, an upstream end 610 b of the blade 610 , a downstream end 610 c of the blade 610 , an upstream end 620 b of the blade 620 , and a downstream end 620 c of the blade 620 ) are cut in the direction parallel to the minor axis.
- the two blades 610 and 620 are so integrated together on both sides thereof in the direction of the major axis by connecting portions 631 and 632 .
- the swirl generating means 60 has a configuration different from that of the swirl generating means 50 . Specifically, both ends of the swirl generating means 60 are cut by a greater amount than the amount by which both ends of the swirl generating means 50 are cut.
- the swirl generating means 60 when the swirl generating means 60 is disposed in the exhaust pipe 1 , the swirl force of the exhaust gas becomes strong, as in the case where the swirl generating means 50 is disposed in the exhaust pipe 1 .
- the flow rate of the exhaust gas was 1200 kg/h; the temperature of the exhaust gas was 520° C.; and the fin angle was 52.5°.
- the pressure loss under these conditions was, however, 10.209 kPa.
- the resistance applied to the exhaust gas decreases as well.
- both ends of the swirl generating means 60 are cut by a greater amount than the amount by which both ends of the swirl generating means 50 are cut. Therefore, when the swirl generating means 60 is disposed in the exhaust pipe 1 , the gap (that is, exhaust gas flow path) formed between the inner wall of the exhaust pipe 1 and both ends of the swirl generating means 60 is larger than that in the case where the swirl generating means 50 is disposed in the exhaust pipe 1 . As a result, the resistance applied to the exhaust gas decreases. Since the swirl generating means 60 is smaller than the swirl generating means 50 , the structure in which the swirl generating means 60 is disposed in the exhaust pipe 1 can be lighter and more compact than the structure in which the swirl generating means 50 is disposed in the exhaust pipe 1 .
- the following confirmation test was conducted. That is, the relationship between the fin angle and the swirl force (see the flow line diagram of FIG. 15 ) and the relationship between the fin angle and the pressure loss (see the graph in FIG. 16 ) were studied in the confirmation test by using two types of fin shown in FIG. 15 , specifically, a new fin (an example of the swirl generating means of the present invention) and a conventional fin (an example of the swirl generating means of the related art).
- the swirl force created when the fin angle of the new fin is 65° is substantially equal to or as strong as the swirl force created when the fin angle of the conventional fin is 45°.
- the pressure loss was approximately 27 kPa when the fin angle of the new fin is 65°, whereas the pressure loss was approximately 44 kPa when the fin angle of the conventional fin is 45°.
- the present invention can provide an exhaust gas purifying device for an internal combustion engine including swirl generating means that creates a strong swirl force and applies reduced resistance.
- the present invention can further provide a swirl generating device that creates a strong swirl force and applies reduced resistance.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
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- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
An exhaust gas purifying device for an internal combustion engine, provided with a swirl generating means for generating a swirl which has a strong swirl force and applying reduced resistance to the swirl. A swirl generating device for generating a swirl which has a strong swirl force and applying reduced resistance to the swirl is also provided. An exhaust gas purifying device (100) for an internal combustion engine is provided with an exhaust pipe (1), a reduction catalyst (2), a reducing agent supply means (3), and a swirl generating means (40). The swirl generating means (40) has two blades (410, 420) formed by dividing a substantially elliptic plate into two in the direction of the major axis thereof. The two blades (410, 420) are integrated together such that the two blades are rotated relative to each other about the minor axis of the plate so as to cross each other, and the two blades are mounted such that the direction of the major axis is parallel to the direction of flow of exhaust gas.
Description
- The present invention relates to an exhaust gas purifying device for an internal combustion engine and a swirl generating device.
- An exhaust gas purifying device for an internal combustion engine is a device for purifying exhaust gas exhausted from the internal combustion engine. A known device of this type includes an exhaust pipe through which exhaust gas exhausted from the internal combustion engine flows, a reduction catalyst provided in the exhaust pipe and reducing and purifying oxynitride contained in the exhaust gas, reducing agent supply means for supplying a reducing agent by injecting it into the exhaust gas flowing upstream of the reduction catalyst, and swirl generating means provided upstream of the reduction catalyst in the exhaust pipe and generating a swirl in the exhaust gas (see Japanese Patent Laid-Open No. 2006-29233, for example).
-
FIG. 8 shows an exemplary exhaust gas purifying device for an internal combustion engine according to the related art.FIG. 8( a) is a schematic view of the exhaust gas purifying device, andFIG. 8( b) is an enlarged perspective view of a key portion V shown inFIG. 8( a). - As shown in
FIG. 8( a), an exhaust gas purifyingdevice 10 for an internal combustion engine includes anexhaust pipe 1, areduction catalyst 2, a reducing agent injection nozzle 3 that supplies a reducing agent (such as urea solution) by injecting it into exhaust gas flowing upstream of thereduction catalyst 2, and swirl generating means 4 for generating a swirl in the exhaust gas and provided upstream of thereduction catalyst 2 in the exhaust pipe 1 (specifically, upstream of a location where the reducing agent is sprayed into the exhaust gas through the reducing agent injection nozzle 3 (see “reducing agent sprayed portion” inFIG. 8( a)). As shown inFIG. 8( b), the swirl generating means 4 is a finned structure including columns 41 and blades 42 and generating turbulence or swirl in the exhaust gas to facilitate diffusion of the reducing agent in the exhaust gas. - In the thus configured exhaust gas purifying
device 10 for an internal combustion engine, the swirl generating means 4 generates turbulence or swirl in the exhaust gas to facilitate diffusion of the reducing agent in the exhaust gas. As a result, the reducing agent can be uniformly supplied to thereduction catalyst 2, whereby exhaust gas purifying performance can be ensured at a certain level or higher. - If a swirl force created by the swirl generating means 4 can be increased, the reducing agent can be more uniformly supplied to the reduction catalyst, whereby the exhaust gas purifying performance can be improved. The swirl force created by the
swirl generating means 4 is therefore desirably improved. - On the other hand, when the exhaust gas passes through the swirl generating means 4, it produces large resistance. The swirl generating means 4 therefore needs to have a certain magnitude of strength. If the resistance produced by the swirl generating means 4 can be reduced, not only can the strength required for the swirl generating means 4 be reduced, but also the fuel consumption of the internal combustion engine can be improved. The resistance produced by the swirl generating means 4 is therefore desirably reduced.
- If the swirl force created by the
swirl generating means 4 is attempted to be increased, however, the resistance produced by the swirl generating means 4 tends to increase, whereas if the resistance produced by theswirl generating means 4 is attempted to be reduced, the swirl force created by the swirl generating means 4 tends to decrease. This is a reason why in related art increase in the swirl force created by the swirl generating means 4 and reduction in the resistance produced by the swirl generating means 4 cannot be simultaneously achieved. - It has therefore been desired to develop an exhaust gas purifying device for an internal combustion engine including swirl generating means that creates a strong swirl force and applies reduced resistance. In addition to the development of such an exhaust gas purifying device for an internal combustion engine, it has also been desired to develop swirl generating means itself that can be disposed in a typical exhaust pipe, produce a strong swirl force, and apply reduced resistance.
- An object of the present invention is to provide an exhaust gas purifying device for an internal combustion engine including swirl generating means that creates a strong swirl force and applies reduced resistance. Another object of the present invention is to provide swirl generating means that creates a strong swirl force and applies reduced resistance.
- To achieve the objects described above, the present invention provides an exhaust gas purifying device for an internal combustion engine including an exhaust pipe through which exhaust gas exhausted from the internal combustion engine flows, a reduction catalyst provided in the exhaust pipe and reducing and purifying an oxynitride contained in the exhaust gas, reducing agent supply means for supplying a reducing agent by injecting the reducing agent into the exhaust gas flowing upstream of the reduction catalyst, and swirl generating means provided upstream of the reduction catalyst in the exhaust pipe and generating a swirl in the exhaust gas. The swirl generating means has two blades formed by halving a substantially elliptic plate along the direction of a major axis thereof. The two blades are so integrated together that the blades are rotated relative to each other about a minor axis of the plate so as to cross each other. (Let θ be a crossing angle between the two blades integrated as described above, and an angle expressed by 90-θ×1/2 is called a fin angle.) The two blades are so mounted that the direction of the major axis is parallel to the direction in which the exhaust gas flows.
- The present invention further provides swirl generating means provided in an exhaust pipe having two blades formed by halving a substantially elliptic plate along the direction of a major axis thereof. The two blades are so integrated together that the blades are rotated relative to each other about a minor axis of the plate so as to cross each other, and the two blades are so mounted that the direction of the major axis is parallel to the direction in which the exhaust gas flows.
- At least one of the two blades described above is desirably so configured that an arcuate portion of an outer edge of the blade is in contact with an inner wall of the exhaust pipe. In particular, both the two blades are more desirably so configured that the arcuate portions of the outer edges of the blades are in contact with the inner wall of the exhaust pipe.
- At least one of the two blades is desirably so configured that both ends thereof in the direction of the major axis are cut in the direction parallel to the minor axis. In particular, both the two blades are desirably so configured that both ends thereof in the direction of the major axis are cut in the direction parallel to the minor axis.
- It is desirable that the two blades are so configured that both ends thereof in the direction of the major axis are integrated together by connecting portions, and that one of the connecting portions, the connecting portion disposed on the upstream side in the exhaust pipe, is configured to connect upstream ends of the two blades with each other.
- The present application claims the priority of Japanese Patent Application No. 2008-241382 filed on Sep. 19, 2008, and the disclosure of which is incorporated herein by reference.
- [
FIG. 1 ]FIG. 1 shows a key portion of an exhaust gas purifying device for an internal combustion engine according to an embodiment of the present invention. - [
FIG. 2 ]FIG. 2 shows swirl generating means viewed from several directions (A to D) shown inFIG. 1 . - [
FIG. 3 ]FIG. 3 is a table showing comparison between the swirl generating means of the present invention and swirl generating means of related art in terms of the magnitudes of swirl force and resistance for fin specifications (I to III). - [
FIG. 4 ]FIG. 4 shows a flow analysis result (flow line) for the fin specifications. - [
FIG. 5 ]FIG. 5 shows a flow analysis result (swirl force) for the fin specifications. - [
FIG. 6 ]FIG. 6 shows a flow analysis result (resistance) for the fin specifications. - [
FIG. 7 ]FIG. 7 shows a flow analysis result (flow speed) for the fin specifications. - [
FIG. 8 ]FIG. 8 shows an exemplary exhaust gas purifying device for internal combustion engine according to related art. - [
FIG. 9 ]FIGS. 9( a) and 9(b) show swirl generating means 50 disposed in anexhaust pipe 1 and viewed from various angles. - [
FIG. 10 ]FIGS. 10( a) to 10(c) show the swirl generating means 50 viewed from directions E to G shown inFIG. 9 . - [
FIG. 11 ]FIG. 11 shows exhaust gas flowing through theexhaust pipe 1 in which the swirl generating means 50 is disposed, the exhaust gas monitored with “EFD V5”. - [
FIG. 12 ]FIGS. 12( a) and 12(b) show swirl generating means 60 disposed in theexhaust pipe 1 and viewed from various angles. - [
FIG. 13 ]FIGS. 13( a) to 13(c) show the swirl generating means 60 viewed from directions H to J shown inFIG. 12 . - [
FIG. 14 ]FIG. 14 shows exhaust gas flowing through theexhaust pipe 1 in which the swirl generating means 60 is disposed, the exhaust gas monitored with “EFD V5”. - [
FIG. 15 ]FIG. 15 shows the relationship between a fin angle and a swirl force. - [
FIG. 16 ]FIG. 16 shows the relationship between the fin angle and pressure loss. - The best mode for carrying out the present invention will be described below.
-
FIG. 1 shows a key portion of an exhaust gas purifying device for an internal combustion engine according to an embodiment of the present invention.FIG. 2 shows swirl generating means 40 viewed from several directions (A to D) shown inFIG. 1 .FIGS. 2(A) to 2(D) correspond to those of the swirl generating means 40 viewed from the directions A to D shown inFIG. 1 , respectively. InFIGS. 1 and 2 , the same portions as those inFIG. 8 have the same reference characters. - As shown in
FIG. 1 , an exhaust gas purifyingdevice 100 for an internal combustion engine includes the swirl generating means 40 in anexhaust pipe 1. As shown inFIG. 2 , the swirl generating means 40 has twoblades blades portions blades blades arcuate portions exhaust pipe 1. - In the thus configured exhaust
gas purifying device 100 for an internal combustion engine, the twoblades exhaust pipe 1. As a result, the exhaustgas purifying device 100 for an internal combustion engine can create a strong swirl force. Further, since theblades blades gas purifying device 100 for an internal combustion engine decreases. - In
FIG. 1 , the swirl generating means 40 is disposed upstream of a reducing agent sprayed portion (seeFIG. 8 ). The present invention is, however, not limited to the embodiment shown inFIG. 1 , and the swirl generating means 40 may be disposed downstream of the reducing agent sprayed portion as long as being disposed upstream of thereduction catalyst 2. - Differences between the swirl generating means of the present invention and the swirl generating means of the related art will next be described with reference to
FIGS. 3 to 7 . -
FIG. 3 is a table showing comparison between the swirl generating means of the present invention (see “inventive proposal” inFIG. 3 ) and the swirl generating means of the related art (see “related art structures FIG. 3 ) in terms of the magnitudes of the swirl force and the resistance for fin specifications (I to III).FIGS. 4 to 7 show flow analysis results for the fin specifications shown inFIG. 3 .FIG. 4 shows flow lines.FIG. 5 shows the swirl force.FIG. 6 shows the resistance.FIG. 7 shows the flow speed. It is noted thatFIG. 6 shows flow analysis results (resistance) only for the fin specifications I and II out of the fin specifications I to III shown inFIG. 3 but does not shows a flow analysis result (resistance) for the fin specification III. - First, as shown in
FIG. 3 , the inventive proposal shows a large swirl force of 2.2 revolutions and a low resistance of 3.2 kPa. In contrast, therelated art structure 1 shows a large swirl force of 2.1 revolutions, which is similar to the magnitude of the swirl force provided in the inventive proposal, but a significantly high resistance of 65.1 kPa. On the other hand, therelated art structure 2 shows a low resistance of 3.2 kPa, which is the same as the magnitude of the resistance provided in the inventive proposal, but a significantly small swirl force of 0.5 revolutions. Further, the flow analysis results shown inFIGS. 4 to 7 indicate that the inventive proposal achieves a large swirl force and low resistance at the same time unlike therelated art structures - As described above, the exhaust
gas purifying device 100 for an internal combustion engine according to the embodiment of the present invention (seeFIG. 1 ) advantageously provides a stronger swirl force and lower resistance than the exhaustgas purifying device 10 for an internal combustion engine of the related art (seeFIG. 8 ). - The above description is provided by way of example for easier understanding of the present invention but does not intend to limit the present invention. The present invention can, of course, be changed or improved without departing from the substance and purpose thereof and encompasses equivalents thereof.
- For example, the above description has been made with reference to the swirl generating means 40 as the swirl generating means, but instead of or in addition to the swirl generating means 40, swirl generating means 50 shown in
FIGS. 9 to 11 or swirl generating means 60 shown inFIGS. 12 to 14 may be used. - The swirl generating means 50 and the swirl generating means 60 will be described below.
- <Swirl generating means 50>
- The swirl generating means 50 will first be described in detail with reference to
FIGS. 9 to 11 .FIG. 11 shows the exhaust gas flowing through theexhaust pipe 1 in which the swirl generating means 50 is disposed, the exhaust gas monitored with “EFD V5” (manufactured by “KOZO KEIKAKU ENGINEERING Inc.”). - As shown in
FIGS. 9 and 10 , the swirl generating means 50 has twoblades 510 and 520 formed by halving a substantially elliptic plate along the direction of the major axis thereof. The twoblades 510 and 520 are so integrated together that they are rotated relative to each other about the minor axis (hereinafter also referred to as a central axis) of the plate so as to cross each other, and the twoblades 510 and 520 are so mounted in theexhaust pipe 1 that the direction of the major axis is parallel to the direction in which the exhaust gas flows. - The
blades 510 and 520 are so configured thatarcuate portions 510 a and 520 a of outer edges of the blades are in contact with the inner wall of theexhaust pipe 1. The twoblades 510 and 520 are also so configured that both ends thereof in the direction of the major axis (specifically, an upstream end 510 b of theblade 510, a downstream end 510 c of theblade 510, an upstream end 520 b of the blade 520, and a downstream end 520 c of the blade 520) are cut in the direction parallel to the minor axis. The twoblades 510 and 520 are so integrated together on both sides thereof in the direction of the major axis by connectingportions - One of the connecting
portions portion 531 disposed on the downstream side in theexhaust pipe 1, is configured to connect downstream portions of the twoblades 510 and 520. More specifically, the connectingportion 531 is configured to connect downstream portions of the twoblades 510 and 520 with each other in a region upstream of the downstream ends 510 c and 520 c of the twoblades 510 and 520 (that is, a region between the downstream ends 510 c, 520 c and the central axis described above). On the other hand, the connectingportion 532 disposed on the upstream side in theexhaust pipe 1 is configured to connect upstream portions of the twoblades 510 and 520. More specifically, the connectingportion 532 is configured to connect the upstream ends 510 b and 520 b of the twoblades 510 and 520 with each other. The connectingportion 532 has a larger width in the direction in which the exhaust gas flows than that of the connectingportion 531. - As shown in
FIG. 11 , when the swirl generating means 50 is disposed in theexhaust pipe 1, the swirl force of the exhaust gas becomes strong. InFIG. 11 , the flow rate of the exhaust gas was 1200 kg/h; the temperature of the exhaust gas was 520° C.; and the fin angle was 52.5°. The pressure loss under these conditions was 12.998 kPa. As described above, when the swirl generating means 50 is disposed in theexhaust pipe 1, the resistance applied to the exhaust gas also decreases. - <Swirl generating means 60>
- The swirl generating means 60 will next be described in detail with reference to
FIGS. 12 to 14 .FIG. 14 shows the exhaust gas flowing through theexhaust pipe 1 in which the swirl generating means 60 is disposed, the exhaust gas monitored with “EFD V5” (manufactured by “KOZO KEIKAKU ENGINEERING Inc.”). - As shown in
FIGS. 12 and 13 , the swirl generating means 60 has substantially the same configuration as that of the swirl generating means 50. Specifically, the swirl generating means 60 has twoblades blades exhaust pipe 1 that the direction of the major axis is parallel to the direction in which the exhaust gas flows. The twoblades arcuate portions exhaust pipe 1, as in the case of the twoblades 510 and 520. The swirl generating means 60 is, as in substantially the same manner as the swirl generating means 50, further so configured that both ends thereof in the direction of the major axis (specifically, anupstream end 610 b of theblade 610, adownstream end 610 c of theblade 610, an upstream end 620 b of theblade 620, and adownstream end 620 c of the blade 620) are cut in the direction parallel to the minor axis. The twoblades portions - The swirl generating means 60, however, has a configuration different from that of the swirl generating means 50. Specifically, both ends of the swirl generating means 60 are cut by a greater amount than the amount by which both ends of the swirl generating means 50 are cut.
- As shown in
FIG. 14 , when the swirl generating means 60 is disposed in theexhaust pipe 1, the swirl force of the exhaust gas becomes strong, as in the case where the swirl generating means 50 is disposed in theexhaust pipe 1. InFIG. 14 as well, the flow rate of the exhaust gas was 1200 kg/h; the temperature of the exhaust gas was 520° C.; and the fin angle was 52.5°. The pressure loss under these conditions was, however, 10.209 kPa. As described above, when the swirl generating means 60 is disposed in theexhaust pipe 1, the resistance applied to the exhaust gas decreases as well. - In particular, both ends of the swirl generating means 60 are cut by a greater amount than the amount by which both ends of the swirl generating means 50 are cut. Therefore, when the swirl generating means 60 is disposed in the
exhaust pipe 1, the gap (that is, exhaust gas flow path) formed between the inner wall of theexhaust pipe 1 and both ends of the swirl generating means 60 is larger than that in the case where the swirl generating means 50 is disposed in theexhaust pipe 1. As a result, the resistance applied to the exhaust gas decreases. Since the swirl generating means 60 is smaller than the swirl generating means 50, the structure in which the swirl generating means 60 is disposed in theexhaust pipe 1 can be lighter and more compact than the structure in which the swirl generating means 50 is disposed in theexhaust pipe 1. - To confirm the advantageous effect of the present invention (that is, the advantageous effect of a stronger swirl force of the exhaust gas and lower resistance applied thereto provided when any of the swirl generating means of the present invention is used), the following confirmation test was conducted. That is, the relationship between the fin angle and the swirl force (see the flow line diagram of
FIG. 15 ) and the relationship between the fin angle and the pressure loss (see the graph inFIG. 16 ) were studied in the confirmation test by using two types of fin shown inFIG. 15 , specifically, a new fin (an example of the swirl generating means of the present invention) and a conventional fin (an example of the swirl generating means of the related art). - As shown in
FIG. 15 , the swirl force created when the fin angle of the new fin is 65° is substantially equal to or as strong as the swirl force created when the fin angle of the conventional fin is 45°. On the other hand, as shown inFIG. 16 , the pressure loss was approximately 27 kPa when the fin angle of the new fin is 65°, whereas the pressure loss was approximately 44 kPa when the fin angle of the conventional fin is 45°. - The findings described above indicate that using the new fin and adjusting the fin angle as appropriate not only allow substantially the same magnitude of swirl force as that created when the conventional fin is used to be obtained but also allow the resistance applied to the exhaust gas to be reduced and hence the pressure loss to be lowered as compared to the case where the conventional fin is used.
- The present invention can provide an exhaust gas purifying device for an internal combustion engine including swirl generating means that creates a strong swirl force and applies reduced resistance. The present invention can further provide a swirl generating device that creates a strong swirl force and applies reduced resistance.
-
- 1 exhaust pipe
- 2 reduction catalyst
- 3 reducing agent injection nozzle
- 40, 50, 60 swirl generating means
- 410, 420, 510, 520, 610, 620 blade
- 410 a, 420 a, 510 a, 520 a, 610 a, 620 a arcuate portion
- 510 b, 520 b, 610 b, 620 b upstream end
- 510 c, 520 c, 610 c, 620 c downstream end
- 431, 432, 531, 532, 631, 632 connecting portion
Claims (14)
1. An exhaust gas purifying device for an internal combustion engine, the exhaust gas purifying device comprising:
an exhaust pipe through which exhaust gas exhausted from the internal combustion engine flows;
a reduction catalyst provided in the exhaust pipe and reducing and purifying an oxynitride contained in the exhaust gas;
reducing agent supply means for supplying a reducing agent by injecting the reducing agent into the exhaust gas flowing upstream of the reduction catalyst; and
swirl generating means provided upstream of the reduction catalyst in the exhaust pipe and generating a swirl in the exhaust gas,
wherein the swirl generating means has two blades formed by halving a substantially elliptic plate along the direction of a major axis thereof, the two blades so integrated together that the blades are rotated relative to each other about a minor axis of the plate so as to cross each other, the two blades so mounted that the direction of the major axis is parallel to the direction in which the exhaust gas flows.
2. The exhaust gas purifying device for an internal combustion engine according to claim 1 ,
wherein the two blades are so configured that arcuate portions of outer edges of the blades are in contact with an inner wall of the exhaust pipe.
3. The exhaust gas purifying device for an internal combustion engine according to claim 1 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are cut in the direction parallel to the minor axis.
4. The exhaust gas purifying device for an internal combustion engine according to claim 1 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are integrated together by connecting portions, and
one of the connecting portions, the connecting portion disposed on the upstream side in the exhaust pipe, is configured to connect upstream ends of the two blades with each other.
5. Swirl generating means provided in an exhaust pipe, the swirl generating means comprising:
two blades formed by halving a substantially elliptic plate along the direction of a major axis thereof, the two blades so integrated together that the blades are rotated relative to each other about a minor axis of the plate so as to cross each other, the two blades so mounted that the direction of the major axis is parallel to the direction in which the exhaust gas flows.
6. The swirl generating means according to claim 5 ,
wherein the two blades are so configured that arcuate portions of outer edges of the blades are in contact with an inner wall of the exhaust pipe.
7. The swirl generating means according to claim 5 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are cut in the direction parallel to the minor axis.
8. The swirl generating means according to claim 5 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are integrated together by connecting portions, and
one of the connecting portions, the connecting portion disposed on the upstream side in the exhaust pipe, is configured to connect upstream ends of the two blades with each other.
9. The exhaust gas purifying device for an internal combustion engine according to claim 2 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are cut in the direction parallel to the minor axis.
10. The exhaust gas purifying device for an internal combustion engine according to claim 2 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are integrated together by connecting portions, and
one of the connecting portions, the connecting portion disposed on the upstream side in the exhaust pipe, is configured to connect upstream ends of the two blades with each other.
11. The exhaust gas purifying device for an internal combustion engine according to claim 3 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are integrated together by connecting portions, and
one of the connecting portions, the connecting portion disposed on the upstream side in the exhaust pipe, is configured to connect upstream ends of the two blades with each other.
12. The swirl generating means according to claim 6 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are cut in the direction parallel to the minor axis.
13. The swirl generating means according to claim 6 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are integrated together by connecting portions, and
one of the connecting portions, the connecting portion disposed on the upstream side in the exhaust pipe, is configured to connect upstream ends of the two blades with each other.
14. The swirl generating means according to claim 7 ,
wherein the two blades are so configured that both ends thereof in the direction of the major axis are integrated together by connecting portions, and
one of the connecting portions, the connecting portion disposed on the upstream side in the exhaust pipe, is configured to connect upstream ends of the two blades with each other.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-241382 | 2008-09-19 | ||
JP2008241382A JP2010071240A (en) | 2008-09-19 | 2008-09-19 | Exhaust gas purifying device for internal combustion engine, and swirl flow generating device |
PCT/JP2009/065168 WO2010032604A1 (en) | 2008-09-19 | 2009-08-31 | Exhaust gas purifying device for internal combustion engine, and swirl generating device |
Publications (1)
Publication Number | Publication Date |
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US20110185710A1 true US20110185710A1 (en) | 2011-08-04 |
Family
ID=42039438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/063,039 Abandoned US20110185710A1 (en) | 2008-09-19 | 2009-08-31 | Exhaust gas purifying device for internal combustion engine, and swirl generating device |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110185710A1 (en) |
EP (1) | EP2325451A4 (en) |
JP (1) | JP2010071240A (en) |
CN (1) | CN102137991A (en) |
WO (1) | WO2010032604A1 (en) |
Cited By (3)
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US20220203314A1 (en) * | 2020-12-25 | 2022-06-30 | Kubota Corporation | Exhaust gas diffusing device |
CN115217591A (en) * | 2022-07-27 | 2022-10-21 | 无锡威孚力达催化净化器有限责任公司 | Urea mixing device with multiple crushing and controllable rotational flow |
US11624305B2 (en) * | 2020-03-02 | 2023-04-11 | Cummins Emission Solutions Inc. | Vortex generators and virtual mixers for aftertreatment systems |
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ITBO20110533A1 (en) * | 2011-09-16 | 2013-03-17 | Magneti Marelli Spa | DISCHARGE SYSTEM OF AN INTERNAL COMBUSTION ENGINE PROVIDED WITH AN ADDITIVE INJECTION DEVICE |
CN102927443B (en) * | 2012-11-12 | 2014-03-05 | 常州大学 | Circular cone type spiral flow generator |
JP6076841B2 (en) * | 2013-06-05 | 2017-02-08 | 本田技研工業株式会社 | Exhaust gas purification device for internal combustion engine |
CN105642145B (en) * | 2016-01-06 | 2018-12-28 | 广州市八通混合器有限公司 | A kind of large size static mixer |
JP6846155B2 (en) * | 2016-10-12 | 2021-03-24 | 東京濾器株式会社 | Swirling flow generator |
JP7382595B2 (en) * | 2019-11-12 | 2023-11-17 | 日立造船株式会社 | Rectifier, hydrolysis equipment, and denitrification equipment |
CN112973485B (en) * | 2021-03-18 | 2021-12-07 | 同济大学 | Quick tubular static mixer |
WO2023228495A1 (en) * | 2022-05-26 | 2023-11-30 | 三菱重工業株式会社 | Denitration device |
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JPS57204305A (en) * | 1981-06-10 | 1982-12-15 | Toshiba Corp | Water flow swirling valve |
JPS62269733A (en) * | 1986-05-15 | 1987-11-24 | Sanko Seisakusho:Kk | Mixing element and mixer containing said element |
JP2004267868A (en) * | 2003-03-06 | 2004-09-30 | Kosuke Chiba | System for dissolving/storing/supplying gas with line atomizer |
JP3892452B2 (en) * | 2004-07-16 | 2007-03-14 | 日産ディーゼル工業株式会社 | Engine exhaust purification system |
JP2008144644A (en) * | 2006-12-08 | 2008-06-26 | Mitsubishi Fuso Truck & Bus Corp | Exhaust emission control device for internal combustion engine |
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- 2009-08-31 EP EP09814449A patent/EP2325451A4/en not_active Withdrawn
- 2009-08-31 WO PCT/JP2009/065168 patent/WO2010032604A1/en active Application Filing
- 2009-08-31 CN CN2009801339829A patent/CN102137991A/en active Pending
- 2009-08-31 US US13/063,039 patent/US20110185710A1/en not_active Abandoned
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US3643927A (en) * | 1970-10-15 | 1972-02-22 | Phillips Petroleum Co | Stationary mixture and method for mixing material |
US3751009A (en) * | 1972-03-02 | 1973-08-07 | Mc Hugh J | Motionless mixing device |
US20090266064A1 (en) * | 2008-04-25 | 2009-10-29 | Tenneco Automotive Operating Company Inc. | Exhaust gas additive/treatment system and mixer for use therein |
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US11624305B2 (en) * | 2020-03-02 | 2023-04-11 | Cummins Emission Solutions Inc. | Vortex generators and virtual mixers for aftertreatment systems |
US20220203314A1 (en) * | 2020-12-25 | 2022-06-30 | Kubota Corporation | Exhaust gas diffusing device |
CN115217591A (en) * | 2022-07-27 | 2022-10-21 | 无锡威孚力达催化净化器有限责任公司 | Urea mixing device with multiple crushing and controllable rotational flow |
Also Published As
Publication number | Publication date |
---|---|
CN102137991A (en) | 2011-07-27 |
WO2010032604A1 (en) | 2010-03-25 |
JP2010071240A (en) | 2010-04-02 |
EP2325451A1 (en) | 2011-05-25 |
EP2325451A4 (en) | 2013-02-20 |
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