CN101124391A - Diverter for catalytic converter - Google Patents
Diverter for catalytic converter Download PDFInfo
- Publication number
- CN101124391A CN101124391A CNA2004800428536A CN200480042853A CN101124391A CN 101124391 A CN101124391 A CN 101124391A CN A2004800428536 A CNA2004800428536 A CN A2004800428536A CN 200480042853 A CN200480042853 A CN 200480042853A CN 101124391 A CN101124391 A CN 101124391A
- Authority
- CN
- China
- Prior art keywords
- diverter
- shunt
- diverter element
- conical
- pipeline portions
- 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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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
- F01N3/08—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
Abstract
A diverter is provided in the present invention, which is of low cost and which is effective in more evenly distributing exhaust gasses passing from a small diameter upstream exhaust gas pipe section (42) into a much larger diameter catalytic converter assembly (20). The diverter includes a diverter element (70) and mounting brackets (72). The diverter element has a central hole (82) and has conical walls with an included angle (G) of at least 70 DEG, the conical walls having a plurality of holes (90). The large conical angle (G) of the diverter effectively directs exhaust gases to the periphery of the large diameter catalytic converter but blocks a radially intermediate portion of the catalyst, while the holes in the conical diverter walls allow sufficient exhaust gases to reach the radially intermediate portion of the catalyst.
Description
Background technique
Vehicle exhaust system generally includes the minor diameter gas exhaust piping part that extends to larger-diameter catalytic converter from gas exhaust manifold, and the conical transition pipeline portions is connected to the downstream of minor diameter pipeline the upstream extremity of catalytic converter.In order better waste gas to be distributed on the larger diameter catalytic converter, in the conical transition pipeline portions, can place shunt.Proposed multiple different diverter designs, but they are usually above least cost and can not waste gas be evenly distributed on the entire cross section of catalyzer effectively.The low-cost shunt that will be evenly distributed in the larger-diameter catalytic converter from the waste gas of small diameter upstream part is valuable.
Summary of the invention
According to one embodiment of present invention, provide motor and the shunt that is used for this engine exhaust pipeline assembly, can utilize the shunt of very low cost that waste gas more is evenly distributed on the cross section of catalytic converter.This shunt is arranged in conical outer transition pipeline portions, and described outside transition pipeline portions partly is connected to larger-diameter catalytic converter with small diameter upstream and keeps pipeline portions.This shunt has the conical diverter walls that angle is at least 70 degree, considerable waste gas is guided into the periphery of catalytic converter.This shunt has center hole flows to catalytic converter with the part in the permission waste gas core.This conical diverter walls has the considerable exhaust flow of permission to the hole of converter intermediate portion, and described intermediate portion is between core and periphery.
Novel feature of the present invention will utilize the feature in the appended claims to be described.On the basis of reading in conjunction with the accompanying drawings hereinafter, will understand the present invention more thoroughly.
Description of drawings
Fig. 1 is the isometric view of engine exhaust pipeline assembly, and upstream portion and downstream part are represented by dotted lines.
Fig. 2 is the lateral elevational view of partly cut-away of the catalytic converter assembly of exhaust duct assembly shown in Figure 1.
Fig. 3 is the isometric view of the shunt of catalytic converter assembly shown in Figure 2.
Fig. 4 is the sectional view of the upstream transition assembly of catalytic converter assembly shown in Figure 2, and has shown the part of upstream part and catalytic converter.
Fig. 5 is the view of cutting open along Fig. 4 cathetus 5-5.
Embodiment
Fig. 1 has shown the exhaust duct assembly 12 of motor 10, and it leads to atmosphere with gas exhaust manifold 14 through baffler 16.There is catalytic converter assembly 20 to be discharged into pollutant in the final waste gas in the atmosphere along the exhaust duct arrangement of components with minimizing.This conduit assembly comprises upstream part 22, and it has the minor diameter of for example 2 inches (5.1 centimetres) and does not get clogged, and waste gas is sent to converter assembly 20.This converter assembly comprises catalytic converter 30, and it comprises that diameter keeps pipeline portions 32 much larger than the catalytic converter of the general cylindrical of upstream part 22.As shown in Figure 2, this converter keeps pipeline portions 32 to hold the converter material 34 with many apertures.The about 2-3 that typically has a diameter from upstream part 42 of this converter material 34 times, so that about 4-9 to be provided cross-section area doubly.This causes the resistance force diminishes by air-flow and causes slowing down by air-flow.Upstream transition assembly 40 is connected to converter with the upstream part 42 of converter assembly and keeps pipeline portions 32, and the upstream of described converter assembly partly has the diameter identical with upstream part 22.
This transition assembly 40 comprises the truncated conical outer transition pipeline portions 50 with minor diameter upstream extremity 52 and downstream 54, described minor diameter upstream extremity has the diameter identical with upstream part 42, and described downstream has with converter and keeps the identical diameter of pipeline portions 32.Shunt 60 is positioned at outside transition pipeline portions 50 inside.
Catalytic converter material piece 34 can have core A, ring-type periphery C, and the intermediate portion B radially of the ring-type between described core and periphery.Do not having under the situation of shunt, the part of waste gas will arrive each catalytic converter part A, B, C.Yet because exhaust-gas flow is rapid, the waste gas that their momentum will cause arriving the upstream extremity of core A has higher concentration than the waste gas of the upstream extremity that arrives periphery C.This will reduce the efficient of catalytic converter converter, and described catalytic converter is most effective when waste gas is evenly distributed on the cross-section area of converter material upstream extremity.
Although used shunt in the past, they can not be evenly distributed on waste gas on the cross section of catalytic converter material 34 upstream extremities usually effectively.And shunt of the prior art has complicated structure usually, causes very high cost.Because a large amount of motors uses, the small reduction of diversion structure cost also is considerable.
Fig. 3 demonstrates shunt and comprises diverter element 70 and a plurality of diverter element 70 is supported on support 72 on conical outer transition pipeline portions 50 inwalls.Described support roughly tilts equably around axis 84, and the zone around the diverter element is divided into a plurality of passages 78 (Fig. 5).Each support preferably has the inner 74 (Fig. 3) on diverter element of being welded to 70 and is welded to outer end 76 on the inwall of outside transition pipeline portions 50.This shunt is a truncated cone shape.It has the upstream extremity 80 of band macropore 82, and described macropore is the center and is positioned on the conical outer transition pipeline portions with the axis 84 of shunt.The conical inner surface 86 with big downstream 88 is led in this hole.This diverter element has a plurality of holes 90, and it helps the even distribution of waste gas.
As shown in Figure 4, diverter element 70 has big diversion angle, wherein angle G be at least 70 the degree, and shown in specific shunt have 85 the degree diversion angle G.Should be noted that this included diversion angle is slightly larger than the included diversion angle H of outside transition pipeline portions 50, the included diversion angle H of described outside transition pipeline portions is 70 degree.The large shunt angle G of shunt helps to make the periphery C of considerable waste gas deflection to catalyst material 34.Big diversion angle G also makes around the passage downstream of shunt and narrows down, and it guides more gas by described hole.Center hole 82 allows the core A of considerable exhaust flow to catalyzer.Hole 90 allows the radially intermediate portion B of a large amount of exhaust flows to catalyst material.
The claimant has designed a kind of exhaust duct assembly (Fig. 2) with shunt 60, described diverter configuration is evenly distributed in the catalysis material 34 for making waste gas, the upstream extremity of wherein outside transition pipeline portions 50 has the diameter 100 of 2 inches (5.1 centimetres), catalytic converter maintenance pipeline portions 32 has the diameter 102 of 6.25 inches (15.9 centimetres), and the length 104 of external transmission pipeline portions is 2.7 inches (6.9 centimetres).The claimant has constructed diverter element 70 as shown in Figure 4, and length 106 is 0.7 inch (1.8 centimetres), and path 10 7 has the upstream diameter 108 of 1 inch (2.5 centimetres) and the downstream diameter 110 of 2.38 inches (6.0 centimetres), and diversion angle G is 85 degree.The claimant is provided with six holes 90, and each hole is that circle and diameter are 0.42 inch (1.07 centimetres).The area of conical diverter element 70 is 5.3 square inches (181 square centimeters), and the area in described six holes is 0.83 square inch (4.4 square centimeters), or is 16% of described conical diverter element area.Porose area (0.83 square inch or 4.4 square centimeters) approximate the area (0.79 square inch (4.0 square centimeters)) of diverter central hole 82 upstream extremities greatly.Converter as shown in Figure 5, the claimant has used three mounting brackets 72 and six holes 90, and between every pair of adjacent stent 72 two holes is arranged.What wish is to provide at least one hole between every pair of support so that waste gas is evenly distributed in around the ring center part of catalysis material more.Described vent diverter and support can be made by the stainless steel material that waste gas is had high corrosion resistance, and have the thickness of for example 0.05 inch (1.3 millimeters).
Therefore, the invention provides a kind of engine exhaust pipeline assembly with conical transition pipeline portions, described conical transition pipeline portions partly is connected to larger-diameter catalyzer with small diameter upstream and keeps pipeline portions, and a kind ofly is arranged in the shunt of transition pipeline portions so that waste gas is evenly distributed to the catalysis material of catalyzer maintenance pipeline portions.Shunt has big angle of flare, and this angle of flare is at least 70 degree and is preferably at least 80 degree, and aforesaid particular diverter has the angle of flare of 85 degree.This angle of flare is preferably more than the angle of flare of outside transition pipeline portions.This big diverter expansion angle causes a large amount of waste gas radially outwards to flow to the periphery of major diameter catalyst material piece and blocks the radially intermediate portion of catalyst material.Center hole in the shunt allows abundant waste gas to pass and flow to the core of catalysis material.Have in the described diverter walls and allow hole that abundant waste gas passes with the exhaust gas flow of balanced flow to the radially intermediate portion of catalysis material.This hole preferably occupies at least 10% of diverter element area, is preferably at least 15%.
Although described here and illustrated specific embodiment of the present invention, will be appreciated that, improve and change and expect easily that to one skilled in the art therefore, claim should be interpreted as comprising this improvement and equivalent.
Claims (9)
1. improvement in motor (10), this motor comprises the exhaust duct assembly (12) that has catalytic converter maintenance pipeline portions (32), described catalytic converter keeps pipeline portions to be used for the catalytic converter material piece (34) that maintenance has the general cylindrical of axis (84), described catalytic converter material piece has the axial component (A) near described axis, with described axial line distance periphery (C) farthest, the radially intermediate portion (B) between described axial component and periphery radially, described exhaust duct assembly comprises than the little upstream part (42) of described converter maintenance pipeline section diameter, with the upstream transition assembly (40) that described upstream partly is connected on the described converter maintenance pipeline portions, wherein said transition assembly comprises conical outer transition pipeline portions (50) that enlarges along downstream direction and the shunt (60) that is positioned at described transition portion, described shunt is used for the waste gas of the catalytic converter material piece that flows into described general cylindrical is distributed more equably, described shunt has conical diverter walls (70), described diverter walls separates along downstream direction expansion and with described conical outer transition pipeline portions, described shunt also has center hole (82), wherein:
Described conical diverter walls forms the angle (G) of at least 70 degree and has a plurality of holes (90), thereby waste gas is distributed on the radially intermediate portion (B) of catalytic converter material more equably.
2. improvement as claimed in claim 1 is characterized in that:
The described hole (90) that is arranged in described conical diverter walls occupy described diverter walls do not have under the situation in described hole area at least 10%.
3. improvement as claimed in claim 2 is characterized in that:
The described angle (G) of the described cone-shaped wall of described shunt is at least 80 degree, and described hole (90) occupy at least 15% of described diverter walls area.
4. improvement as claimed in claim 1, wherein said shunt is made by sheet metal, and have conical diverter element (70) and at least three supports (72) that substantially radially extend, described support separates angledly and the position on the described element is connected to described outside transition pipeline portions around described axis, wherein:
Described support is divided into a plurality of external channel parts (78) with the part of described outside transition pipeline length;
The described a plurality of holes (90) that are arranged in described diverter walls comprise at least one hole of angled layout between every pair of adjacent stent, flow into each described external channel part from described diverter element is inner to allow waste gas.
5. improvement as claimed in claim 1 is characterized in that:
The area of described center hole (82) of described shunt that is arranged in the described upstream extremity place of described shunt is substantially equal to the area in all described holes of described conical diverter walls.
6. a shunt (60), it is placed on minor diameter pipeline part (42) is connected in the upstream conical outer transition pipeline portions (50) that larger diameter catalytic converter keeps pipeline portions (32), comprising:
Substantially conical sheet metal diverter element (70), described diverter element have upstream extremity (80) and downstream (88), in the diameter minimum of described upstream extremity diverter element, in the diameter maximum of described downstream diverter element;
At least three supports (72), each support all has the radial inner end (74) that is fixed on the described diverter element and is fixed to the radial outer end (76) of described upstream conical outer transition pipeline, therefore, described support is divided into channel part (78) with the zone between described diverter element and the described outside transition pipeline portions;
Described diverter element has center hole (82) and wherein has the cone-shaped wall of a plurality of holes (90), and has at least one hole between every pair of adjacent described support, flows into described each channel part from described diverter element is inner to allow waste gas.
7. shunt as claimed in claim 6 is characterized in that:
Described conical diverter element is with the angle shunting of at least 70 degree, and the described hole in the described cone-shaped wall occupies at least 10% of described diverter element inner surface area.
8. the combination of a upstream conical outer transition pipeline portions (50) and shunt (60), described upstream conical outer transition pipeline portions has axis (84) and leads to the large-diameter end (54) that catalytic converter keeps the catalysis material (34) in the pipeline portions (32), described shunt is positioned at described transition pipeline portions, described outside transition pipeline portions is with first angle of flare (H) expansion, wherein:
Described shunt comprises truncated cone shape sheet metal diverter element (70), described diverter element has upstream extremity (80) and downstream (88), diameter minimum in described upstream extremity diverter element, in the diameter maximum of described downstream diverter element, described conical diverter element is shunted with second angle of flare (G);
At least three supports (72), each support all have the radial inner end (74) that is fixed on the described shunt and are fixed to radial outer end (76) on the described transition pipeline portions;
Described second angle of flare (G) is than the big several years of described first angle of flare (H).
9. combination as claimed in claim 8, it is characterized in that: described second angle (G) is at least 70 degree, and comprise a plurality of holes (90) that are arranged in described diverter element, described hole is positioned at the downstream of described diverter element upstream extremity (80), and the gross area in all described holes is at least 10% of a described diverter element surface area.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2004/008095 WO2005094253A2 (en) | 2004-03-17 | 2004-03-17 | Diverter for catalytic converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101124391A true CN101124391A (en) | 2008-02-13 |
Family
ID=35064237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800428536A Pending CN101124391A (en) | 2004-03-17 | 2004-03-17 | Diverter for catalytic converter |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1743090A2 (en) |
| CN (1) | CN101124391A (en) |
| WO (1) | WO2005094253A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736092A (en) * | 2016-04-21 | 2016-07-06 | 杭州携蓝环保科技有限公司 | Gas flow uniformizing device for purification of engine exhaust, and engine exhaust purifying device |
| CN106481413A (en) * | 2016-12-14 | 2017-03-08 | 姜学杰 | A kind of new tail gas catalyzing unit |
| CN111517286A (en) * | 2019-02-01 | 2020-08-11 | 华贸中经环保科技(天津)有限公司 | Ozone generator and fluid distribution system thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4787817B2 (en) * | 2007-12-27 | 2011-10-05 | 三菱ふそうトラック・バス株式会社 | Engine exhaust purification system |
| DE102008031136B4 (en) * | 2008-07-01 | 2023-03-23 | Purem GmbH | exhaust gas treatment device |
| FR2945576A1 (en) * | 2009-05-14 | 2010-11-19 | Peugeot Citroen Automobiles Sa | Mixer for mixing fuel e.g. diesel, injected into exhaust line with exhaust gas produced by internal combustion of car, has deflector whose length along path is greater or equal to half of large transverse dimension of inner periphery |
| EP2713023A1 (en) * | 2012-09-28 | 2014-04-02 | Katcon Global S.A. | Exhaust assembly |
| FR3012519A3 (en) * | 2013-10-25 | 2015-05-01 | Renault Sa | CATALYST FOR AN EXHAUST LINE OF A GAS STREAM |
| GB2524258A (en) * | 2014-03-17 | 2015-09-23 | Gm Global Tech Operations Inc | Aftertreatment device having an improved inlet cone |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3852042A (en) * | 1973-01-29 | 1974-12-03 | Universal Oil Prod Co | Catalytic converter with exhaust gas modulating chamber for preventing damage to catalyst substrate |
| US3958950A (en) * | 1974-03-20 | 1976-05-25 | Universal Oil Products Company | Compact exhaust gas converter with pulse dampening means |
| JP3794960B2 (en) * | 2001-03-15 | 2006-07-12 | ナブテスコ株式会社 | Fluid motor drive circuit |
| US6712869B2 (en) * | 2002-02-27 | 2004-03-30 | Fleetguard, Inc. | Exhaust aftertreatment device with flow diffuser |
-
2004
- 2004-03-17 EP EP04821851A patent/EP1743090A2/en not_active Withdrawn
- 2004-03-17 CN CNA2004800428536A patent/CN101124391A/en active Pending
- 2004-03-17 WO PCT/US2004/008095 patent/WO2005094253A2/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736092A (en) * | 2016-04-21 | 2016-07-06 | 杭州携蓝环保科技有限公司 | Gas flow uniformizing device for purification of engine exhaust, and engine exhaust purifying device |
| CN105736092B (en) * | 2016-04-21 | 2018-06-29 | 杭州携蓝环保科技有限公司 | Air-flow uniform device, the purifier of engine tail gas purification |
| CN106481413A (en) * | 2016-12-14 | 2017-03-08 | 姜学杰 | A kind of new tail gas catalyzing unit |
| CN111517286A (en) * | 2019-02-01 | 2020-08-11 | 华贸中经环保科技(天津)有限公司 | Ozone generator and fluid distribution system thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1743090A2 (en) | 2007-01-17 |
| WO2005094253A2 (en) | 2005-10-13 |
| WO2005094253A3 (en) | 2007-03-08 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |