CN1710263A - Return-floe type catalytic converter - Google Patents
Return-floe type catalytic converter Download PDFInfo
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- CN1710263A CN1710263A CN 200510078149 CN200510078149A CN1710263A CN 1710263 A CN1710263 A CN 1710263A CN 200510078149 CN200510078149 CN 200510078149 CN 200510078149 A CN200510078149 A CN 200510078149A CN 1710263 A CN1710263 A CN 1710263A
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- vent systems
- clean unit
- waste gas
- catalysis element
- catalysis
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- 239000002912 waste gas Substances 0.000 claims abstract description 74
- 238000010992 reflux Methods 0.000 claims abstract description 55
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 238000006555 catalytic reaction Methods 0.000 claims description 117
- 239000007789 gas Substances 0.000 claims description 28
- 238000004080 punching Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
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- 238000005476 soldering Methods 0.000 claims description 3
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 238000000746 purification Methods 0.000 abstract description 4
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
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- Exhaust Gas After Treatment (AREA)
Abstract
To provide a exhausting system (100) for internal combustion engine comprising a housing (10) with at least one waste gas inlet hole (11) and the other waste gas outlet hole (12), and the said exhausting system has a catalytic element, the said catalytic element is installed in the exhausting system (100) housing (10), in order to purify the waste gas in internal combustion engine, the said exhausting system can be made easily and cheaply, but still obtain the high conversion rate so as to meet the increasing circumstance requirement. To proposal that setting up at least one purification unit (13) in the housing (10) of the exhausting system (100), the said purification unit comprises at least the said catalytic element (14) and refluxing device (15), wherein some or entire waste gas get through the catalytic element (14) of purification unit (13) before they arrives at downstream refluxing device (15), the refluxing device (15) makes waste gas (22) through the catalytic element (14) again, this time is from another side.
Description
Technical field
The present invention relates to a kind of vent systems that is used for internal-combustion engine, wherein this internal-combustion engine can be four-stroke or two stroke gasoline engines.Yet the use of vent systems in two-cycle engine is convenient especially.Because the structure of its compactness, this vent systems also can be used in the manual instrument, as is used in chain saw, hedgeclipper or the similar device of gasoline driven.Vent systems comprises a housing, for exhaust gas inlet is provided with at least one hole, and is provided with the another one hole for waste gas outlet in this housing.In order to prevent that waste gas from not escaping in the atmosphere with not being cleaned, at least one catalysis element also is arranged in the housing, the catalysis element thereby some or all of waste gas was flowed through before escaping in the atmosphere through gas outlet hole.
Background technique
Know that from prior art the use catalysis element reduces the discharging from the pollutant of internal-combustion engine in vent systems.These catalysis elements can realize having the waste gas that is included in the composition in the gas with reprocessing.Use remaining oxygen to divide hydrocarbon is changed into carbon dioxide or carbon monoxide.For lower conversion ratio, promptly all be converted to carbon dioxide or carbon monoxide if not all hydrocarbon, then Tu Fu wire netting may be useful, rather than common honeycomb catalytic converter.Compare widely with the honeycomb catalytic converter, the production of binary catalyst element is simple and correspondingly more cheap especially.
Summary of the invention
In the present context, the object of the present invention is to provide a kind of vent systems with a catalysis element, this catalysis element can be easily and is made cheaply but can realize high conversion ratio by means of this catalysis element, to satisfy the environmental legislation of increasingly stringent.
This purpose realizes that by the feature of listing these features are owing to following reason is meaningful especially in claim 1.
The vent systems that is used for gasoline engine according to the present invention comprises a housing, provides at least one hole that is used for exhaust gas inlet and the another one hole that is used for waste gas outlet in this housing.A clean unit is provided in the housing of vent systems, and comprises at least one catalysis element and a reflux.Clean unit can be installed in the housing by welding, protrusion and/or non-protruding locking anchor clamps simply.Catalysis element is with respect to the layout of reflux and the principle equivalence of container, and the opening of this container is by screen portion or covering fully.Itself is arranged in clean unit in the housing in such a way, thereby the waste gas that flows into is at least partly or wholly guided by the catalysis element in the clean unit.In order to guarantee that the waste gas that these parts transform passes through same catalysis element once more, reflux is arranged in the catalysis element back.When waste gas passes through catalysis element, force waste gas bump reflux, by this reflux waste gas is turned back to their just derivative catalysis elements; And waste gas must pass through it once more, specifically from opposite side.Then, at least a portion that repeats the waste gas that transforms can escape into atmosphere or on every side by the hole that is used for waste gas outlet.The another part that has transformed waste gas mixes mutually with the waste gas of inflow, and is guided by the catalysis element in the clean unit once more.Cold, inflow exhaust gas and waste gas heat, that part transforms this mixes the thermal load that is reduced on the catalysis element.This has increased the operating life of catalysis element again.Owing to also force waste gas that part transforms repeatedly, so also improved conversion by the catalysis element in the clean unit.In addition, artificially increased the residence time of waste gas in vent systems.By this way, only just can realize best purifying effect by means of a catalysis element.Frequently mean that by catalysis element vent systems can be very little, also reduced the expense that is used for material thus.As a result, can in existing exhaust structure, be mounted or reequip with having no problem according to vent systems of the present invention.In a word, by means of above-mentioned measure, can significantly improve the conversion ratio of vent systems with simple structure and small size.In addition, the application of purification provides the noise attentuation effect that strengthens, and this effect depends on that the precision of waste gas refluxes.
The other facility of vent systems is configured in the dependent claims 2 to 18 and describes.
In order further to improve the conversion ratio according to vent systems of the present invention, waste gas can be directed to repeatedly from both sides through same catalysis element.For this purpose, clean unit must be arranged in the housing in such a way, thereby the major part of backflow waste gas is by housing or the shell body wall clean unit that leads back.By this way, waste gas they before exit orifice escapes in the atmosphere only the catalysis element with an especially flat just can almost completely be transformed.
In the another one embodiment of vent systems, reflux is configured to bowl-type or paraboloidal shape.Catalysis element is arranged in the front in the hole in the reflux then at least in part.The bowl-type of reflux or paraboloidal shape design reflux waste gas in a controlled manner, thereby can control the flow path by vent systems.By this device, the part of waste gas can be refluxed in the mode with limiting that can estimate, thereby flows through catalysis element several times from both sides.
The another one embodiment of vent systems is provided as, and the whole hole of reflux is covered by catalysis element, thereby all backflow waste gas all are conducted through catalysis element at least twice.Catalysis element can be flat, arc, ripple or certain other analogous shape.The surface area that increases catalysis element also is used for improving the chemical reversion process that takes place in waste gas.
In order to prevent the same point of all backflow exhaust flows in catalysis element, this can cause only realizing medium conversion ratio, the another kind of modification of suggestion vent systems, and wherein the bottom surface of reflux has the profile of ripple or fluctuating.Each protuberance in the bottom surface or singular point can be prevented the accumulation of backflow waste gas, thereby waste gas can be crossed the whole surface of catalysis element with stream with uniform distribution.
A kind of simple and cheap distortion according to vent systems of the present invention is provided as, and reflux constitutes the part of housing.In this case, whole reflux needn't be formed by housing, but for example the bottom surface of reflux can be replaced by a shell body wall.This measure is used for cutting down materials demand and weight.And, in clean unit, can cool off part conversion and therefore hot waste gas better, thus the operating life that prolongs catalysis element.For this reason, the corresponding shell wall also can be consistent with ripple or for rising and falling, with heat dissipation on large surface area.
In the concrete elastic design according to vent systems of the present invention, reflux is partly or entirely built by stainless steel.Stainless use is used for preventing the corrosion of reflux, and reflux is exposed to chemical erosion waste gas particularly.By this way, can prolong the whole operating life of vent systems.If reflux does not form an integral part (as the modification of describing in the past) with housing, then whole housing can be by a simple Steel Facing structure.Can certainly electroplate housing and other element of vent systems, to prolong their operating life.
In a certain embodiments, clean unit is arranged in the hole that is used for exhaust gas inlet relatively.By this way, might guarantee that all inflow exhaust gas enter in the clean unit as far as possible far, and therefore be guided to catalysis element at least twice by clean unit.This major part that also guarantees the waste gas that refluxed is mixed with the cold waste gas of inflow.Main flow and the influence of pressure condition under, the waste gas of mixing is just sent back to the clean unit facing to the hole that is used for exhaust gas inlet.Therefore, this vent systems presents high conversion.
In order further to improve this conversion ratio, a clean unit can comprise a plurality of catalysis elements.For example, by means of two or three catalysis elements that are arranged side by side, significantly improve the efficient of clean unit.In the same manner, it is contemplated that a clean unit also can comprise a plurality of refluxes, these refluxes are covered by one or more catalysis elements.In a kind of layout with a plurality of refluxes, the waste gas of inflow can be refluxed more accurate and more neatly, is promptly refluxed on a plurality of different directions.
In the another one embodiment of vent systems, at least two clean units are arranged in the housing.By this way, waste gas can be back to other clean unit from a clean unit, and vice versa.If second clean unit is arranged with respect to first clean unit, realize that then a kind of of two clean units especially simply arranges.By this way, can realize constant repetitive cycling or " table tennis " effect, wherein waste gas finally passed through identical clean unit repeatedly at them before vent systems is escaped.
If at least one auxiliary catalysis planning in the housing except that existing clean unit, and by at least some of this auxiliary catalysis element direct exhaust, then realizes a significant especially embodiment of vent systems.This auxiliary catalysis element preferably is arranged in the housing in such a way, this auxiliary catalysis element thereby the waste gas of all inflows and outflow must be flowed through.For this reason, the auxiliary catalysis element can surround the hole of the exhaust gas inlet of enclosure interior, thereby inflow exhaust gas must at first pass through the auxiliary catalysis element.Therefore, also will mention auxiliary, first catalysis element hereinafter.Position auxiliary, first catalysis element in the inlet hole back has such advantage: set up the necessary waste gas back-pressure of two-cycle engine.If first catalysis element has crooked shape, then the while exhaust flow is directed to the clean unit of existence best, because the speed and the inertia of the exhaust flow of setting up at this some place make this simple especially.Also it is contemplated that,, escaping into the shortcoming that is heated once more before the outside although this layout has outflow waste gas the front of auxiliary catalysis planning in the waste gas outlet hole.
In order to build vent systems as far as possible cheaply, can use the panel catalysis element of net type or punching, such element is available as cheap half-finished parts, in any case the catalysis element by clean unit is repeatedly at least because force waste gas.The use of binary catalyst element is for the catalysis element in the clean unit with for the practical solution of auxiliary catalysis element.Because according to the particular design of waste gas system of the present invention, can realize high conversion, such conversion ratio otherwise only just can realize by means of the honeycomb catalyst of costliness.Thereby, in the vent systems (describe as former part, also see Fig. 1 and 2) of description structure, record conversion ratio greater than 50% with net type or punching panel catalysis element.And binary, net type or punching panel catalysis element have such advantage: they can not be heated to comparable honeycomb catalytic converter many like that, and they have lower flow resistance.As a result, the binary catalyst element has long operating life.In addition, the performance of internal-combustion engine is influenced hardly.
In another embodiment of vent systems, catalysis element can be configured to self-supporting.By this way, can save and be used for being positioned in the housing to catalysis element or be used for they are fixed on the reflux or the supplemental support of its top or keep structure.In addition, expanded the possible purposes of catalysis element thus, because they almost allow unconfined change in shape.
In another embodiment, catalysis element at point of contact place that net forms element each other melting welding or soldering or otherwise for good and all engage, to improve mechanical strength.
And the catalysis element of part coating can be used among the cheap especially embodiment of vent systems.For example, needn't apply catalysis element and housing or the contacted position of reflux, in any case because do not have waste gas can cross these positions.
Description of drawings
Below, will explain the present invention in more detail with reference to accompanying drawing and each embodiment.In the accompanying drawings:
Fig. 1 represents the 3-D view according to a kind of vent systems of the present invention, and this vent systems has a clean unit and one first, arc catalysis element,
Fig. 2 represents the longitudinal cross-section according to vent systems of the present invention by Fig. 1,
Fig. 3 represents the similar longitudinal cross-section with Fig. 2, but by a different embodiment with a plurality of clean units according to the present invention,
Fig. 4 a represents to be used for a kind of schematic representation of catalysis net of catalysis element, and this catalysis net has simply, the line thigh of weaving,
Fig. 4 b represents to be used for a kind of schematic representation of catalysis net of catalysis element, and this catalysis net has the line thigh of paired braiding, and
The 3-D view of the catalysis net of Fig. 4 c presentation graphs 4a, this catalysis net has the line thigh of simple braiding.
Embodiment
Fig. 1 represents the 3-D view according to one first embodiment of vent systems 100 of the present invention.A housing 10 of this vent systems 100 has and is essentially cubical shape.In order also to represent the internal structure of vent systems 100, the layout of catalysis element 14,18 and reflux 15 particularly, vent systems 100 is represented in the mode of part excision.In this particularly advantageous embodiment, one first, arc catalysis element 18 are arranged in the front in the hole 11 that is used for exhaust gas inlet in the mode of surrounding or comprise.As a result, force the waste gas 21 of all inflows before the inside 19 that further flows into housing 10, to pass through first catalysis element.It is just relative with first catalysis element 18 and inlet hole 11 that clean unit 13 is positioned to.This clean unit 13 comprises a binary catalyst element 14 of punching panel 14 forms, arranges a bowl-type reflux in catalysis element 14 back.Clean unit 13 and catalysis element 18 can by be welded to connect, anchor clamps or protrude locking anchor clamps (not shown) and be fixed in a fixed manner in the housing 10.Under present case, the hole 16 of reflux 15 is not partly, but is all covered by catalysis element 14.For this reason, catalysis element 14 also can by be welded to connect, anchor clamps or protrude the locking anchor clamps and be fixed on the reflux 15.As previously indicated, the most of at least of inflow exhaust gas 21 is directed in the clean unit 13 through first catalysis element 18.Here, the gas catalysis element 14 in clean unit of flowing through for the first time then.The waste gas that part transforms is gone back to catalysis element 14 by reflux 15 then.Therefore, the waste gas 22 that turns back must pass through catalysis element 14 once more to arrive clean unit 13.Now, a part of waste gas 23 can the hole 12 through being used for waste gas outlet escape into the outside, and hole 12 is located in the housing 10 in the upper area of vent systems 100 and is relative with inlet hole 11.The remainder of waste gas mixes with cold inflow exhaust gas 21, and is sent clean unit 13 once more.This embodiment is specially adapted to two-cycle engine.
Fig. 2 provides according to more the clearly demonstrating of the operating principle of vent systems 100 of the present invention, because the waste gas that here flows into, refluxes and flow out 21,22 and 23 is expressed as arrow.This figure represents the longitudinal cross-section by the vent systems 100 in the zone of the import of Fig. 1 and exit orifice 11,12.Such as can be clearly seen, inflow exhaust gas 21 must be by catalysis element 18 to arrive the inside 19 of housing 10.The design of the arc of first catalysis element 18 makes the major component of waste gas be directed to auxiliary catalysis element 14 in clean unit 13.And, catalysis element 14 on the arc catalysis element and below extension.By this way, the major part that can guarantee inflow exhaust gas 21 also enters clean unit 13 really.Under present case, clean unit 13 is not designed to the integral part of housing 10.Therefore, bowl-type reflux 15 has its oneself bottom surface 17.This is consistent with shape at the housing 10 of its back basically.As a result, it does not have ripple or undulations, because it is flat.The waste gas that transforms by the part of catalysis element 14,18 for twice is led once more by catalysis element 14, but is from the inboard specifically.The part of these backflow waste gas 22 is mixed with fresh, inflow exhaust gas 21, another part is directed to the outside through the hole 12 that is used for waste gas outlet, and third part is once more by arc first catalysis element 18 and go back to clean unit 13 by shell body wall then.This constant backflow of waste gas also provides good noise attentuation in housing 10.If wish further noise attentuation, auxiliary reflux or sound arrester can be provided in the free time, upper area of inner space 19.The clean unit 13 because waste gas was generally flowed through before escaping through vent systems 100 several times is so promptly use binary catalyst element 14,18 also can realize high conversion ratio.
The embodiment of Fig. 3 shows according to a kind of vent systems 100 of the present invention, this vent systems 100 comprise altogether three clean units 13,13 '.In these unit, as in the configuration of Fig. 1 and 2 of former description, it is relative with the hole 11 that is used for exhaust gas inlet that clean unit 13 is arranged to.But clean unit 13 is built into the integral part of housing 10.In this case, housing 10 is as the bottom surface 17 of reflux 15.The bottom bend of bowl-type reflux 15 is also by crooked replace (the seeing the lower left corner of housing 10) of the existence of housing.Have only the top curved of reflux 15 in housing 10, must be provided as extra section.This extra section can for good and all be fixed on the shell body wall panel component as a bending.This set not only can reduce the quantity of material of use, and the means of the heat radiation of a kind of improvement on the whole cooling surface of housing are provided.For this reason, bottom surface 17 can be a ripple also, thereby increases this surface and relevant therewith heat radiation.In addition, the waste gas 22 of the bottom surface 17 anti-backflow of ripple or fluctuating shape is forced through catalysis element 14 with the volume that changes.
In addition, two other clean units 13 ' be arranged on the shell body wall, on the hole 11 that is used for exhaust gas inlet with following (relative) with clean unit 13.These other clean units 13 ' further increased are wished the number of times that refluxes in housing 10.By this way, also can improve conversion ratio.Two other clean units 13 ' each comprise a catalysis element 14 ' and reflux 15 '.Yet, also it is contemplated that, the catalysis element 14 in two holes of two clean units 13 ' include only complete extend through (reflux 15 ') '.The advantage of doing like this is that erect image is such in the embodiment of Fig. 1 and 2, in any case force inflow exhaust gas 21 all to pass through catalysis element at least once equally before leaving vent systems 100.Two other clean unit 13 ' each is designed to an integral part of housing 10.
As shown in Figure 3, represent a projection 20, clean unit 13,13 ' be held or be hooked in the housing 10 by projection 20.Yet these projections 20 also can be replaced by weld seam, catalysis element 14,14 ' and/or clean unit 13,13 ' itself for good and all be fixed on the housing by weld seam.
Various netted catalysis elements 14,14 ', 18 at length be illustrated among Fig. 4 a to 4c.Fig. 4 a and 4b represent from the incision cross section of top and the respective wire seen from the left side.These represent level and vertical cross-section by the correspondence net in Fig. 4 a and 4b respectively.Net 30 is made up of with vertical retention wire thigh 32 interlaced with each other or that interweave the line thigh 31 that level keeps itself.
In the embodiment's of Fig. 4 a net 30, two adjacent horizontal retention wire thighs 31 are knitted together simply by the vertical retention wire thigh 32 to its horizontal expansion.In this example, a horizontal retention wire thigh 31 is alternately up and down by vertical retention wire thigh 32, and line thigh 32 is direct to be arranged close to each otherly.This equally also is applicable to vertical retention wire thigh 32, and line thigh 32 is up and down by two adjacent horizontal retention wire thighs 31.As a result, this net 30 has very usual braiding structure, wherein for example horizontal retention wire thigh 31 picture woven monofilaments.
For increase netted catalysis element 14,14 ', 18 mechanical strength and elasticity, horizontal retention wire thigh 31 for good and all is connected with public point of contact 33 places of vertical retention wire thigh 32 at them.This can for example realize by melting welding, soldering or similar connection.These measures can be used for preventing being harmful to and noisy resonance in net 30.
In Fig. 4 c, the net 30 of Fig. 4 a is with three dimensional representation.By this way, single figure is used for clearly illustrating each root level and vertical retention wire thigh 31,32 path relative to each other.
In the modification of the net of representing in Fig. 4 b 30, every horizontal retention wire thigh 31 passes through above two adjacent vertical retention wire thighs 32, and then two that follow adjacent vertical retention wire thighs 32 below by.Two adjacent horizontal retention wire thighs 31 are walked around the opposite side of a vertical retention wire thigh 32, thereby improve the stability of net 30 widely.Even these vertical and horizontal retention wire thighs 31,32 also can for good and all be joined to one another at their point of contact 33 places.This also makes net 30 have braiding structure.
Certainly, in order to create net 30, be used for level woven each other with vertical retention wire thigh 31,32 and other layout of weave in be can imagine with feasible.The combination of punching panel and net 30 also can be used for catalysis element 14,14 ', 18.
Also should be noted that according to vent systems 100 of the present invention to be used as a complete vent systems, perhaps also can be as beginning, centre or the end facility of existing part vent systems.By this way, can use two or more catalysis elements 22 flat or plane simultaneously.Various embodiments' multiple combination is possible, unless they are because technical reason is incompatible.
At last, should be noted that according to vent systems 100 of the present invention also can be provided with, as long as these technical characteristicss are finished identical functions except that the technical characteristics those described herein.
The Reference numeral index
100 gas extraction system
10 housings
11 are used for the hole of exhaust gas inlet
12 are used for the hole of waste gas outlet
13 clean units
13 ' auxiliary clean unit
14 13 catalysis element
14 ' 13 ' catalysis element
15 13 reflux
15 ' 13 ' reflux
16 15 hole
17 15 bottom surface
18 auxiliary catalysis elements
The inside of 19 housings 10 or inner space
20 projections
The arrow of 21 indication inflow exhaust gas
The arrow of 22 indication backflow waste gas
The arrow of waste gas is flowed out in 23 indications
30 nets
31 vertical retention wire thighs
32 horizontal retention wire thighs
33 31 and 32 point of contact
Claims (18)
1. a vent systems (100) that is used for internal-combustion engine has a housing (10), in this housing, at least one hole that is used for exhaust gas inlet (11) is set and another is used for the hole (12) of waste gas outlet, and
This vent systems (100) has a catalysis element, and this catalysis element is arranged in the housing (10) of vent systems (100), is used for purifying the waste gas from internal-combustion engine,
It is characterized in that at least one clean unit (13) is arranged in the housing (10) of vent systems (100 '), and comprise described at least catalysis element (14) and reflux (15),
Wherein before by the catalysis element (14) of clean unit (13), reflux (15) makes waste gas (22) once more by catalysis element (14) to some or all of waste gas, is from opposite side specifically at the reflux (15) in their arrival downstreams.
2. vent systems according to claim 1,
It is characterized in that, the same catalysis element (14) that waste gas flows through clean unit (13) from alternate sides repeatedly, the waste gas of backflow (22) is guided to from clean unit (13), by housing (10) and get back to clean unit (13).
3. according to claim 1 or 2 each described vent systems,
It is characterized in that reflux (15) is bowl-type or paraboloidal shape, wherein the catalysis element (14) of clean unit (13) is pointed in a hole (16) of reflux (15).
4. according to each described vent systems of claim 1 to 3,
It is characterized in that the whole hole (16) of reflux (15) is covered by catalysis element (14), thereby from all waste gases (22) that clean unit (13) the refluxes catalysis element (14) of all flowing through.
5. according to each described vent systems of claim 1 to 4,
It is characterized in that the bottom surface (17) of reflux (15) has the profile of ripple or fluctuating, thereby the accumulation of backflow waste gas (22) is avertible.
6. according to each described vent systems of claim 1 to 5,
It is characterized in that reflux (15) forms the part of housing (10).
7. according to each described vent systems of claim 1 to 6,
It is characterized in that reflux (15) comprises stainless steel.
8. according to each described vent systems of claim 1 to 7,
It is characterized in that, relatively arrange clean unit (13) with the hole that is used for exhaust gas inlet (11).
9. according to each described vent systems of claim 1 to 8,
It is characterized in that a clean unit (13) comprises a plurality of catalysis elements (14) and/or a plurality of reflux (15).
10. according to each described vent systems of claim 1 to 9,
It is characterized in that at least one second clean unit (13 ') is arranged in the inside (19) of housing (10).
11. according to each described vent systems of claim 1 to 10,
It is characterized in that one second clean unit (13 ') is relatively arranged with first clean unit (13), thereby the waste gas (22) that refluxes is derived first clean unit (13) and is imported into second clean unit (13 ').
12. according to each described vent systems of claim 1 to 11,
It is characterized in that at least one auxiliary first catalysis element (18) is arranged in the housing (10), some or all of inflow exhaust gas (21) are guided to by this catalysis element (18).
13. vent systems according to claim 12,
It is characterized in that the hole in exhaust gas inlet (11) are surrounded by first catalysis element (18) in the inside (19) of housing (10) or comprise.
14. according to claim 12 or 13 each described vent systems,
It is characterized in that first catalysis element (18) is with the front of arc arranged in form in the hole that is used for exhaust gas inlet (11).
15. according to each described vent systems of claim 1 to 14,
It is characterized in that one or more auxiliary catalysis elements (18) and the one or more catalysis elements (14) that belong to clean unit (13) are designed to net or punching panel.
16. according to each described vent systems of claim 1 to 15,
It is characterized in that catalysis element (14,18) is designed to part structural support.
17. according to each described vent systems of claim 1 to 16,
It is characterized in that the point of contact (33) that catalysis element (14,18) forms element (31,32) at net is located perhaps for good and all to be connected by some other means by melting welding or soldering together.
18. according to each described vent systems of claim 1 to 17,
It is characterized in that, partly or wholly apply catalysis element (14,18).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202004009506.8 | 2004-06-17 | ||
| DE202004009506 | 2004-06-17 | ||
| DE202004019896.7 | 2004-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1710263A true CN1710263A (en) | 2005-12-21 |
| CN100439670C CN100439670C (en) | 2008-12-03 |
Family
ID=35706546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100781492A Expired - Fee Related CN100439670C (en) | 2004-06-17 | 2005-06-17 | Return-floe type catalytic converter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100439670C (en) |
| IT (1) | ITTO20050426A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926848A (en) * | 2012-10-31 | 2013-02-13 | 常州市凯宇工具有限公司 | Exhaust pipe |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611198A (en) * | 1994-08-16 | 1997-03-18 | Caterpillar Inc. | Series combination catalytic converter |
| JP2000051711A (en) * | 1998-08-07 | 2000-02-22 | Nippon Steel Corp | Catalyst carrier for purification of exhaust gas and its production |
| JP2002097929A (en) * | 2000-09-27 | 2002-04-05 | Isuzu Ceramics Res Inst Co Ltd | Diesel particulate filter |
| JP2002119868A (en) * | 2000-10-17 | 2002-04-23 | Babcock Hitachi Kk | Catalytic structural body for purifying waste gas |
| CN1262741C (en) * | 2003-05-18 | 2006-07-05 | 吉林大学 | Naturally preheating and exhaust-lowering engine cold starting device |
-
2005
- 2005-06-16 IT ITTO20050426 patent/ITTO20050426A1/en unknown
- 2005-06-17 CN CNB2005100781492A patent/CN100439670C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926848A (en) * | 2012-10-31 | 2013-02-13 | 常州市凯宇工具有限公司 | Exhaust pipe |
| CN102926848B (en) * | 2012-10-31 | 2016-01-13 | 常州市盛发灯泡厂 | Outlet pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| ITTO20050426A1 (en) | 2005-12-18 |
| CN100439670C (en) | 2008-12-03 |
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