CN109322726A - Exhaust gas purification and noise elimination set composite - Google Patents
Exhaust gas purification and noise elimination set composite Download PDFInfo
- Publication number
- CN109322726A CN109322726A CN201811328318.7A CN201811328318A CN109322726A CN 109322726 A CN109322726 A CN 109322726A CN 201811328318 A CN201811328318 A CN 201811328318A CN 109322726 A CN109322726 A CN 109322726A
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- Prior art keywords
- exhaust gas
- silencer
- exhaust
- channel
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 230000008030 elimination Effects 0.000 title claims abstract description 17
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 17
- 238000000746 purification Methods 0.000 title claims abstract description 14
- 230000003584 silencer Effects 0.000 claims abstract description 48
- 238000005192 partition Methods 0.000 claims abstract description 21
- 230000004888 barrier function Effects 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000009977 dual effect Effects 0.000 abstract description 3
- 239000004071 soot Substances 0.000 abstract description 3
- 208000002925 dental caries Diseases 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 29
- 230000000694 effects Effects 0.000 description 5
- 239000008187 granular material Substances 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000009102 absorption Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
-
- 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
- F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
-
- 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
- F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
-
- 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a kind of exhaust gas purifications and noise elimination set composite, belong to exhaust gas aftertreatment techniques field, including exhaust gas intake port pipe, exhaust exit pipe, filter housings, filter core intake channel, filter cartridge outlet channel, porous barrier, right support partition, exhaust gas intake port pipe is connected on the left of silencer, exhaust gas intake port pipe is provided with aperture on the tube wall of pipeline section part in two cavitys respectively, silencer is internally connected with the filter housings as particle trapper, filter core is disposed in shell, filter core is made of several square airflow channels, is made of between channel filtering material.The present apparatus utilizes choke type perforated pipe noise elimination structure and two expansion chambers, low, mid-frequency noise can be effectively eliminated, soot emissions amount is greatly reduced using surface type particle trapper, the dual function of diesel engine vent gas purification and noise control is realized by integrated structure design, it can optimize and save exhaust after treatment system space structure, have many advantages, such as compact-sized, functional, stable.
Description
Technical field
The present invention relates to the devices of engine exhaust gas purification and noise elimination, and in particular to diesel engine row can be effectively reduced in one kind
Gas noise, the device that can be used for granular material discharged control in exhaust again belong to engine exhaust and post-process relevant technical field.
Background technique
Diesel engine is widely used in commercial vehicle, engineering machinery, ship etc. due to its superior dynamic property and economy
Power device.Exhaust noise is the most important noise source of diesel engine, and the compression ratio of diesel engine is high, maximum outbreak pressure is big, exhaust
Noise pollution is generally even more serious compared with gasoline engine, is the important sources of city noise pollution;The particulate matter of diesel engine discharge simultaneously
Very small, 0.1~0.2 μm of average out to, be the important sources for constituting city haze pollutant emission.Therefore, how to effectively control
The concentration of emission of diesel particulate reduces diesel exhaust noise, meets increasingly strict city emission regulation demands, be to work as
Preceding diesel engine needs urgent the technical issues of solving.
Country is increasingly stringent to the limitation of diesel engine pollutant emission and noise at present, after causing existing diesel to be vented
The exhaust silencer noise reduction effect of processing system installation is difficult to meet tightened up national standard noise limitation, and granular material discharged warp
Chang Chaobiao.In order to obtain the good noise elimination of internal combustion engine range from low to high under the premise of not increasing pressure at expulsion loss
Effect needs to optimize the internal structure and parameter of exhaust silencer, to obtain higher exhausting silencer effect simultaneously
Promote Muffler Performance and noise abatement;Meanwhile for the pollution of control diesel exhaust gas and exhaust noise is reduced, it needs in exhaust system
Clarifier and silencer are installed in system.It, can be by the emission of diesel particulate in order to save exhaust after treatment system space
Control device and exhaust noise controller organic assembling are designed to integral structure, realize diesel engine vent gas purification and exhaust
The dual function of noise control.Therefore, compact-sized, functional, stable exhaust purging muffler tool is designed and developed
There is important meaning.
Summary of the invention
The present invention be to provide it is a kind of can be optimized by internal structure to diesel exhaust aftertreatment system and parameter,
Realization can reduce diesel exhaust noise, can be effectively controlled granular material discharged Novel diesel engine exhaust purging muffler again.
A kind of exhaust gas purification provided according to the present invention and noise elimination set composite, the I. C. engine exhaust system for not showing that
In system, be mounted on exhaust gas flow through the corresponding tail pipe (not shown) of exhaust system including the opening between exhaust system and environment it
Before.Preferably, set composite is horizontally arranged setting under assembled state, including exhaust gas intake port pipe, exhaust exit pipe, filter head housings
Body, filter core intake channel, filter cartridge outlet channel, porous barrier, right support partition, left side cavity, middle chamber, right side cavity.
It is circular exhaust gas intake port pipe that cross section is connected on the left of set composite, exhaust gas intake port pipe sequentially pass through silencer left side wall panel,
Porous barrier, and be connected on right support partition;It is circular exhaust exit pipe, exhaust that cross section is connected on the right side of set composite
Outlet passes through silencer right side wall panel, communicates with cavity on the right side of silencer;Set composite is internally connected with as micro particle catching
The filter housings of device, the cross section of filter housings are circle, are disposed with filter core in filter head housings body, filter core is by several pros
Shape airflow channel composition.It is made of between channel the filtering material of certain wall thickness, the present embodiment filtering material uses porous ceramics;
It is filter core intake channel, filter cartridge outlet channel respectively, intake channel is on right side by intake channel per two adjacent airflow channels
Plug is blocked, and exit passageway is blocked in left side by exit passageway plug.
There are porous barrier, right support partition inside set composite;Siding, silencer downside siding, noise elimination on the upside of silencer
Device return panels and silencer rear side wall panel have collectively constituted the silencer barrel that section is rectangle.Porous barrier, right support every
Plate is separately fixed on the silencer barrel of rectangle.
The confined space formed between silencer left side wall panel, porous barrier and silencer barrel is left side cavity;It is porous
The confined space formed between partition, right support partition and silencer barrel is middle chamber;On the right side of right support partition, silencer
The confined space formed between siding and silencer barrel is right side cavity.
Exhaust gas intake port pipe is provided with inlet tube middle section aperture on the tube wall of the pipeline section part in middle chamber respectively, in left side
Left section of aperture of inlet tube is provided on the tube wall of pipeline section part in cavity, the inlet tube middle section aperture and inlet tube of the present embodiment are left
Duan little Kong is to be uniformly distributed, aperture 8mm.
It applies the technical scheme of the present invention, after the exhaust high speed of diesel engine flows into exhaust gas intake port pipe, due to exhaust gas intake port pipe
It is blocked by right support partition, portion discharge flows into left side cavity, part by left section of aperture of inlet tube of the exhaust gas intake port pipe
Exhaust flows into middle chamber by inlet tube middle section aperture, and the exhaust for flowing into middle chamber may pass through aperture on porous barrier and flow into
Left side cavity;Exhaust roundtrip flowing, energy attenuation in left side cavity and middle chamber, realize the purpose of noise elimination noise reduction.
The exhaust collected separately flows into spaced each filter core intake channel then from the filter inlet for being located at left side cavity, arranges
Gas is after the entrance of filter core intake channel, and since intake channel is blocked on right side by intake channel plug, exit passageway is in left side
It is blocked by exit passageway plug, so that exhaust can only be across the porous ceramics wall surface channel, from another adjacent channel
Namely filter cartridge outlet channel is flowed out, and in the process, the particulate matter (soot) in exhaust is deposited over as filtering material
On the porous ceramics wall surface of the intake channel, the trapping function of particulate matter in exhaust is realized.It realizes noise reduction and purifies dual function
After energy, exhaust is flowed to the right from filter outlet, is arranged again through tail pipe to atmosphere by exhaust exit pipe.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of exhaust gas purification provided in an embodiment of the present invention Yu noise elimination set composite.
Fig. 2 is that the cross section of the exhaust gas purification and noise elimination set composite that obtain after the position the A-A cutting shown in Fig. 1 shows
It is intended to.
Each label indicates in figure:
1 set composite, 2 exhaust gas intake port pipe, 3 filter core intake channel, 4 exit passageway plug
5 left side cavity, 6 porous ceramics, 7 middle chamber, 8 filter housings, 9 intake channel plug
10 right side cavity, 11 filter cartridge outlet channel, 12 exhaust exit pipe, 13 silencer right side wall panel
17 porous barrier of siding on the downside of 14 right support partition, 15 inlet tube middle section aperture, 16 silencer
20 silencer return panels of siding, 21 silencer rear side wall panel on the upside of left section of 19 silencer of aperture of 18 inlet tubes
22 filter inlet, 23 filter outlet, 24 silencer left side wall panel, 25 trap tube sheet
Specific embodiment
According to Fig. 1 and Fig. 2, in the internal combustion engine exhaust system that set composite 1 is used to not show that, it is mounted on waste gas stream
It crosses before the corresponding tail pipe (not shown) of the exhaust system including the opening between exhaust system and environment.Preferably, compound dress
Setting is horizontally arranged setting under assembled state, including exhaust gas intake port pipe 2, exhaust exit pipe 12, filter housings 8, filter core import
Channel 3, filter cartridge outlet channel 11, porous barrier 17, right support partition 14, left side cavity 5, middle chamber 7, right side cavity 10.
It is circular exhaust gas intake port pipe 2 that cross section is connected on the left of set composite, and exhaust gas intake port pipe sequentially passes through silencer left side wall panel
24, porous barrier 17, and be connected on right support partition 14, the right end of the exhaust gas intake port pipe is exported by 14 envelope of right support partition
It is stifled;It is circular exhaust exit pipe 12 that cross section is connected on the right side of the set composite, and the exhaust exit pipe passes through silencer
Right side wall panel 13 is communicated with cavity 10 on the right side of silencer.Set composite is internally connected with the filter head housings as particle trapper
The cross section of body 8, filter housings 8 is circle, and filter housings are fixedly attached on porous barrier 17 and right support partition 14;
Filter core is disposed in filter housings 8, the both ends of filter core are separately mounted on trap tube sheet 25, and the filter core is by several pros
Shape airflow channel composition.It is made of between channel the filtering material of certain wall thickness, the present embodiment filtering material uses porous ceramics
6;Every two adjacent airflow channels, are filter core intake channel 3 and filter cartridge outlet channel 11 respectively, intake channel is on right side
It is blocked by intake channel plug 9, exit passageway is blocked in left side by exit passageway plug 4.
There are porous barrier 17, right support partition 14 inside the set composite;Siding 19, silencer downside on the upside of silencer
Siding 16, silencer return panels 20 and silencer rear side wall panel 21 have collectively constituted the silencer barrel that section is rectangle.Institute
State porous barrier 17, right support partition 14 is separately fixed on the silencer barrel of rectangle.
The confined space formed between silencer left side wall panel 24, porous barrier 17 and silencer barrel is left side cavity 5;
The confined space formed between porous barrier 17, right support partition 14 and silencer barrel is middle chamber 7;Right support partition
14, the confined space formed between silencer right side wall panel 13 and silencer barrel is right side cavity 10.
Exhaust gas intake port pipe 2 be provided on the tube wall of the pipeline section part in middle chamber 7 respectively inlet tube middle section aperture 15,
Left section of aperture 18 of inlet tube, the inlet tube middle section aperture 15 of the present embodiment are provided on the tube wall of pipeline section part in left side cavity 5
It is to be uniformly distributed with left section of aperture 18 of inlet tube, aperture 8mm.
It is small from left section of inlet tube of the exhaust gas intake port pipe respectively after the exhaust high speed of diesel engine flows into exhaust gas intake port pipe 2
Hole 18 flows into left side cavity 5, flows into middle chamber 7 from inlet tube middle section aperture 15;Cavity collects in left side exhaust then from
Positioned at the filter inlet 22 of left side cavity, spaced each filter core intake channel 3 is separately flowed into, due to there is intake channel stifled
First 9 and exit passageway plug 4, exhaust can only be across the porous ceramics wall surface channel, from adjacent filter cartridge outlet channel 11
Outflow, flows to the right through filter outlet 23, is arranged again through tail pipe to atmosphere by exhaust exit pipe 12.
A kind of exhaust gas purification provided in this embodiment and noise elimination set composite, have the effect that
1. choke type perforated pipe noise elimination structure and left side cavity and middle chamber that the present invention utilizes exhaust gas intake port pipe to have
Two expansion chambers, low, mid-frequency noise can be effectively eliminated.
2. the exhaust gas particulate trapping that the present invention arranges is surface type particle trapper, pass through the machines such as absorption, deposition, shock
Reason, can finely ground particles effectively in traps diesel exhaust, and the concentration of emission of soot in diesel exhaust gas is greatly reduced, and right
Also there is certain effect in further decreasing exhaust noise.
3. the present invention realizes the integrated structure design of Diesel Engine Exhaust Purification and noise elimination, after capable of optimizing and saving exhaust
Processing system space structure has many advantages, such as compact-sized, functional, stable.
Claims (3)
1. a kind of exhaust gas purification and noise elimination set composite, including exhaust gas intake port pipe (2), exhaust exit pipe (12), filter housings
(8), filter core intake channel (3), filter cartridge outlet channel (11), porous barrier (17), right support partition (14), left side cavity (5),
Middle chamber (7), right side cavity (10);It is characterized in that being connected with cross section on the left of set composite is circular exhaust gas intake port pipe
(2), exhaust gas intake port pipe (2) sequentially passes through silencer left side wall panel (24), porous barrier (17), and is connected to right support partition
(14) on;It is circular exhaust exit pipe (12) that cross section is connected on the right side of the set composite, and the exhaust exit pipe passes through
Silencer right side wall panel (13) is communicated with cavity (10) on the right side of silencer;There are porous barrier (17), the right side inside the set composite
Supporting clapboard (14);Siding (19), silencer downside siding (16), silencer return panels (20) and silencer on the upside of silencer
Rear side wall panel (21) has collectively constituted the silencer barrel that section is rectangle;The porous barrier (17), right support partition (14)
It is separately fixed on the silencer barrel of rectangle.
2. a kind of exhaust gas purification according to claim 1 and noise elimination set composite, it is characterized in that the cross of filter housings (8)
Section is circle, and filter housings (8) are fixedly attached on porous barrier (17) and right support partition (14);Filter housings
(8) it is disposed with filter core in, the both ends of filter core are separately mounted on trap tube sheet (25), and the filter core is by several square air-flows
Channel composition;It is made of between channel the filtering material of certain wall thickness, filtering material uses porous ceramics (6);It is described every adjacent
Two airflow channels, be filter core intake channel (3) and filter cartridge outlet channel (11) respectively, the intake channel right side by into
Mouth channel plug (9) is blocked, and the exit passageway is blocked in left side by exit passageway plug (4).
3. a kind of exhaust gas purification according to claim 1 and noise elimination set composite, it is characterized in that exhaust gas intake port pipe (2) is respectively
Inlet tube middle section aperture (15), the pipeline section in left side cavity (5) are provided on the tube wall of the pipeline section part in middle chamber (7)
Left section of aperture (18) of inlet tube is provided on partial tube wall, left section of aperture (18) of inlet tube middle section aperture (15) and inlet tube is
It is uniformly distributed, aperture 8mm.
Priority Applications (1)
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CN201811328318.7A CN109322726A (en) | 2018-10-31 | 2018-10-31 | Exhaust gas purification and noise elimination set composite |
Applications Claiming Priority (1)
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CN201811328318.7A CN109322726A (en) | 2018-10-31 | 2018-10-31 | Exhaust gas purification and noise elimination set composite |
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CN109322726A true CN109322726A (en) | 2019-02-12 |
Family
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CN201811328318.7A Pending CN109322726A (en) | 2018-10-31 | 2018-10-31 | Exhaust gas purification and noise elimination set composite |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111412037A (en) * | 2020-04-22 | 2020-07-14 | 扬州工业职业技术学院 | Exhaust particle trapping device based on microwave heating regeneration |
CN112177711A (en) * | 2020-09-22 | 2021-01-05 | 徐工集团工程机械股份有限公司道路机械分公司 | Noise elimination filter and exhaust emission device |
CN113107724A (en) * | 2021-04-30 | 2021-07-13 | 东风汽车集团股份有限公司 | Air filter structure of air inlet system |
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US4961314A (en) * | 1988-08-15 | 1990-10-09 | Arvin Industries, Inc. | Tuned exhaust processor assembly |
US5279630A (en) * | 1992-01-03 | 1994-01-18 | Ernst-Apparatebau Gmbh & Co. | Soot filter for diesel engines |
JP2003097248A (en) * | 2001-09-26 | 2003-04-03 | Hino Motors Ltd | Exhaust gas purifier |
CN1464936A (en) * | 2001-08-08 | 2003-12-31 | 丰田自动车株式会社 | An exhaust gas purification device |
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CN201802458U (en) * | 2010-09-10 | 2011-04-20 | 吉林艾瑞环保技术有限公司 | Pressure-stabilizing mixed-flow type exhaust purification muffler |
CN204024776U (en) * | 2014-06-09 | 2014-12-17 | 陈庆东 | A kind of exhaust gas post-treatment device with waste gas ejecting |
CN209212343U (en) * | 2018-10-31 | 2019-08-06 | 扬州工业职业技术学院 | Particulate matter filtering and silencing apparatus |
-
2018
- 2018-10-31 CN CN201811328318.7A patent/CN109322726A/en active Pending
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US4961314A (en) * | 1988-08-15 | 1990-10-09 | Arvin Industries, Inc. | Tuned exhaust processor assembly |
US5279630A (en) * | 1992-01-03 | 1994-01-18 | Ernst-Apparatebau Gmbh & Co. | Soot filter for diesel engines |
CN1464936A (en) * | 2001-08-08 | 2003-12-31 | 丰田自动车株式会社 | An exhaust gas purification device |
JP2003097248A (en) * | 2001-09-26 | 2003-04-03 | Hino Motors Ltd | Exhaust gas purifier |
CN1914410A (en) * | 2003-12-12 | 2007-02-14 | 日野自动车株式会社 | Exhaust gas purifier |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111412037A (en) * | 2020-04-22 | 2020-07-14 | 扬州工业职业技术学院 | Exhaust particle trapping device based on microwave heating regeneration |
CN112177711A (en) * | 2020-09-22 | 2021-01-05 | 徐工集团工程机械股份有限公司道路机械分公司 | Noise elimination filter and exhaust emission device |
CN113107724A (en) * | 2021-04-30 | 2021-07-13 | 东风汽车集团股份有限公司 | Air filter structure of air inlet system |
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