CN204552897U - After-treatment device and explosive motor - Google Patents
After-treatment device and explosive motor Download PDFInfo
- Publication number
- CN204552897U CN204552897U CN201520004186.8U CN201520004186U CN204552897U CN 204552897 U CN204552897 U CN 204552897U CN 201520004186 U CN201520004186 U CN 201520004186U CN 204552897 U CN204552897 U CN 204552897U
- Authority
- CN
- China
- Prior art keywords
- treatment device
- inlet cone
- exhaust gas
- baffle plate
- explosive motor
- 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.)
- Expired - Fee Related
Links
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Embodiment of the present utility model provides a kind of after-treatment device (281,282,283,284), it is for purifying the exhaust gas of the motor vehicle with explosive motor, described after-treatment device comprises catalyst converter substrate (286) and inlet cone (285), exhaust gas arrives catalyst converter substrate from this inlet cone, wherein inlet cone comprises baffle plate (320,330), and described baffle plate to be contained in described inlet cone and to be configured to realize higher than flow uniformity index threshold (UI
thr) flow uniformity index (UI), described flow uniformity index represents the percentage of the catalyst volume utilized.A kind of explosive motor with this after-treatment device is also provided.
Description
Technical field
The disclosure relates to a kind of after-treatment device, and it is for purifying the exhaust gas of the motor vehicle with explosive motor, and this after-treatment device has the inlet cone of improvement.Also relate to a kind of explosive motor comprising this after-treatment device.
Background technique
It is known that Modern Engine is provided with one or more exhaust after treatment system, it is also called catalytic converter.Usually, catalytic converter is made up of catalyst converter substrate or core, and it normally has the ceramic monomer (monolith) of honeycomb structure, bearing catalyst layer or coating.After-treatment system can be any device being configured to change exhaust gas composition.Their example is diesel oxidation catalyst (DOC), and it is positioned in exhaust line and is included in hydrocarbon residues (HC) in exhaust gas and carbon monoxide (CO) for degrading; Lean nitrogen oxide catcher (LNT), it is arranged for trapping the nitrogen oxide that comprises in exhaust gas and being positioned in exhaust line.
Example also comprises the exhaust gas after-treatment system for discharging minimizing, and particularly from particulate and the nitrogen oxide (NO of diesel engine exhaust gas
x).These Operation system setting have after-treatment device, and described device is installed along the exhaust line of motor and typically comprises the diesel particulate filter (DPF) controlled for particulate, and for NO
xselective catalytic reduction (SCR) system controlled.
Typically, after-treatment device comprises inlet cone (inlet cone), and exhaust gas is by described inlet cone inletting device.Catalytic converter is made up of catalyst converter substrate or core, and it normally has the ceramic monomer of cellular structure.The coated complex material having so-called carrier coating (washcoat) of described monomer.Carrier coating is bearing material for catalysis material and is used at the upper dispersion of high surface (highsurface area).Aluminium oxide, titanium dioxide, silica or silicon-aluminum mixture can be used.Catalysis material (precious metal, such as platinum, palladium and rhodium) is suspended in carrier coating before being in application to core.
One of after-treatment system task is obtain flow uniformity index high as far as possible.Evenness index means how air-flow is distributed in the canned bricked thing (canned brick) of device well.From the angle of mathematics, evenness index can be defined as follows:
Wherein:
UI=flow uniformity index
The surface area of the first layer of unit in the substrate of A=catalyst converter
V=exhaust gas speed
=exhaust gas mean velocity
The after-treatment device of good flow uniformity exponent pair close-coupled is even more important: these devices are received as near motor and therefore their shape is often by engine geometry effect of constraint value.
In fact, flow uniformity index is important parameter, and it shows have how many inner bricked thing to be used, in other words, i.e. and carrier coating and precious metal.The percentage that the bricked object that flow uniformity index (UI) instruction is used for emissions reduction amasss.
Unfortunately, above-mentioned all after-treatment devices for close-coupled, owing to affecting the package constraint of bricked thing shape, are approximately that the standard target of the evenness index of 0.9 is often difficult to realize.
Therefore, there is the newly-designed demand to the after-treatment device overcoming above-mentioned inconvenience.
The purpose of this utility model is to provide a kind of after-treatment device, and it has new feature, the intrabasement exhaust gas distribution of described new feature modifying device.
These objects are by a kind of after-treatment device and realized by a kind of explosive motor.
Dependent claims defines preferred and/or especially favourable aspect.
Model utility content
Embodiment of the present disclosure provides a kind of after-treatment device, it is for purifying the exhaust gas of the motor vehicle with explosive motor, after-treatment device comprises catalyst converter substrate and inlet cone, exhaust gas arrives catalyst converter substrate from described inlet cone, wherein inlet cone comprises baffle plate, described baffle plate to be contained in inlet cone and to be configured to realize the flow uniformity index higher than flow uniformity index threshold, and described flow uniformity index represents the percentage of the catalyst volume utilized.
The advantage of this embodiment comprises the flow uniformity index improved on bricked thing, in other words, increases the desired value that evenness index makes it higher than 0.9.This means the better use of precious metal in catalyzer and therefore cause the transformation efficiency of the improvement of after-treatment device.
According to another embodiment of the present utility model, baffle plate is profiled metal sheet.
The advantage of this embodiment is that profiled metal sheet allows exhaust airstream to be separated into two subvolumes, which improves evenness index.
According to another embodiment, baffle plate is interior tapering.
According to the aspect of this embodiment, interior tapering reduces relative to inlet cone.
The advantage of this embodiment is, the cross section formed by inlet cone and interior tapering is that annular circle is crown substantially, and gas can flow in a more uniform manner.
According to another embodiment, the disclosure provides a kind of explosive motor, its be equipped with according to preceding embodiment any one described in after-treatment device.
Accompanying drawing explanation
Below by example mode, with reference to the following drawings various embodiment is described, wherein said accompanying drawing is:
Fig. 1 is the schematic diagram of after-treatment device.
Fig. 2 is general after-treatment device.
Fig. 3 shows according to the exhaust gas distribution in the inlet cone of the after-treatment device of prior art.
Fig. 4 shows according to the exhaust gas distribution in the inlet cone of the after-treatment device of embodiment of the present utility model.
Fig. 5 is the inlet cone of the after-treatment device according to another embodiment of the present utility model.
Fig. 6 is the viewgraph of cross-section of the embodiment of Fig. 5.
Reference character
110 explosive motors
270 vent systems
275 outlet pipes
280 after-treatment systems
281 diesel oxidation catalyst (DOC)
282 lean nitrogen oxide catchers (LNT)
283 selective catalytic reduction (SCR) system
284 particulate filters (DPF)
The inlet cone of 285 after-treatment devices
286 catalyst converter substrates
300 flow directions
310 hyperpycnal flow volumes
320 profiled metal sheets
Tapering in 330
UI flow uniformity index
UI
thrflow uniformity index threshold
The volume of the first layer of unit in the substrate of A catalyst converter
V exhaust gas speed
exhaust gas mean velocity
Embodiment
Some embodiments can comprise explosive motor as shown in Figure 1 (ICE) 110, and it comprises vent systems 270.Vent systems 270 can comprise the outlet pipe 275 with one or more exhaust after treatment system 280.After-treatment system can be any device being configured to change exhaust gas composition.Some examples of after-treatment system 280 comprise, but be not limited to, the combination of catalytic converter (two logical and threeways), oxidation catalyzer (DOC) 281, lean nitrogen oxide catcher (LNT) 282, hydrocarbon adsorber, selective catalytic reduction (SCR) system 283, particulate filter (DPF) 284 or latter two device, namely comprises the selective catalytic reduction system operating (SCRF) of particulate filter.
Fig. 2 shows general after-treatment device 280, and it has inlet cone 285 and catalyst converter substrate 286.Fig. 3 shows the exhaust gas distribution in the inlet cone of the after-treatment device of the standard design according to inlet cone.As observed, air-flow 300 does not have and is uniformly distributed in inlet cone, but is more concentrated in designated volume 310, has hyperpycnal flow.This causes low evenness index.In fact, evenness index is relevant to the shape of the inlet cone of the after-treatment device of close-coupled consumingly.In order to limit the excellent in shape of inlet cone, direct airflow by rights, will need many spaces.Because explosive motor needs compact as much as possible, so this is impossible.Therefore, evenness index has to improve independently from the shape of inlet cone.
According to embodiment of the present utility model, idea is introduce the feature in inlet cone, to guide and to order about the air-flow from turbosupercharger region to bricked portion, bricked portion volume can be utilized as much as possible.A kind of baffle plate, it is positioned in inlet cone, is the solution improving evenness index.
Fig. 4 shows according to the exhaust gas distribution in the inlet cone of the after-treatment device of embodiment of the present utility model.In this case, baffle plate is made up of profiled metal sheet 320, and it is accommodated in inlet cone.As observed, air-flow 300 have in inlet cone evenly distribution and flow uniformity index UI can higher than the threshold value UI of hope
thr, described threshold value is 0.9.
Fig. 5 is the inlet cone according to another embodiment of the present utility model, and wherein baffle plate realizes as interior tapering 330.Preferably, interior tapering can be made up of metallic material and can be had the shape of inlet cone, in other words can be the inlet cone reduced.As what can observe from Fig. 5 and Fig. 6 (viewgraph of cross-section of the embodiment of Fig. 5), gas can flow in the volume between inlet cone 285 and interior tapering 330.Cross section between two tapered portion circumferentially has width identical substantially, and in other words, it is crown that cross section is substantially annular circle, and gas can flow in a more uniform manner.Also according to this embodiment, flow uniformity index UI can higher than the threshold value UI of hope
thr, described threshold value is 0.9.
Generally speaking, disclosed after-treatment system demonstrates significant advantage: the flow uniformity index on bricked thing is modified, and is namely increased to higher than desired value 0.9; This causes the transformation efficiency of the improvement for general after-treatment device (i.e. diesel oxidation catalyst or lean nitrogen oxide catcher); Finally, the free space for the catalysis device of close-coupled can use in a more effective manner.
Although illustrate at least one exemplary embodiment during general introduction above and details describe, should be realized that a large amount of changes exists.Also will be appreciated that one or more exemplary embodiment is only example, and be not intended to as limited field, application or configuration by any way.But, aforesaid general introduction and details describe and will be provided for the convenient road map figure implementing at least one exemplary embodiment for those skilled in the art, should understand function in the embodiments described and layout and can have various change but not deviate from the scope that appended claims and legal equivalents thereof state.
Claims (5)
1. an after-treatment device (281,282,283,284), for purifying the exhaust gas of the motor vehicle with explosive motor, it is characterized in that, described after-treatment device comprises catalyst converter substrate (286) and inlet cone (285), exhaust gas arrives described catalyst converter substrate from described inlet cone, wherein said inlet cone comprises baffle plate (320,330), and described baffle plate to be contained in described inlet cone and to be configured to realize higher than flow uniformity index threshold (UI
thr) flow uniformity index (UI), described flow uniformity index represents the percentage of the catalyst volume utilized.
2. after-treatment device according to claim 1, is characterized in that, described baffle plate is profiled metal sheet (320).
3. after-treatment device according to claim 1, is characterized in that, described baffle plate is interior tapering (330).
4. after-treatment device according to claim 3, is characterized in that, described interior tapering (330) is reduced relative to described inlet cone (285).
5. an explosive motor (110), is characterized in that, this explosive motor is equipped with the after-treatment device (281,282,283,284) according to any one of foregoing Claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1404786.4 | 2014-03-17 | ||
| GB1404786.4A GB2524258A (en) | 2014-03-17 | 2014-03-17 | Aftertreatment device having an improved inlet cone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204552897U true CN204552897U (en) | 2015-08-12 |
Family
ID=50634937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520004186.8U Expired - Fee Related CN204552897U (en) | 2014-03-17 | 2015-01-05 | After-treatment device and explosive motor |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20150260073A1 (en) |
| CN (1) | CN204552897U (en) |
| GB (1) | GB2524258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762050A (en) * | 2015-11-20 | 2017-05-31 | 罗伯特·博世有限公司 | Integrated form exhaust gas aftertreatment system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2260685A1 (en) * | 1972-12-12 | 1974-06-27 | August Paul Dipl Ing Dr H C | AFTERBURNER FOR COMBUSTION MACHINERY |
| EP0918146A1 (en) * | 1997-11-19 | 1999-05-26 | Sulzer Chemtech AG | Apparatus for decomposing pollutants of exhaust gases by means of catalytic converters |
| FR2829183B1 (en) * | 2001-09-05 | 2006-02-17 | Peugeot Citroen Automobiles Sa | EXHAUST LINE OF A MOTOR VEHICLE COMPRISING A THERMALLY ADJUSTING DEPOLLUTION DEVICE |
| GB0329095D0 (en) * | 2003-12-16 | 2004-01-14 | Johnson Matthey Plc | Exhaust system for lean burn IC engine including particulate filter |
| CN101124391A (en) * | 2004-03-17 | 2008-02-13 | 克林空气系统国际公共有限公司 | Diverter for catalytic converter |
| DE102010006829B4 (en) * | 2010-02-03 | 2013-08-14 | Benteler Automobiltechnik Gmbh | exhaust system |
-
2014
- 2014-03-17 GB GB1404786.4A patent/GB2524258A/en not_active Withdrawn
-
2015
- 2015-01-05 CN CN201520004186.8U patent/CN204552897U/en not_active Expired - Fee Related
- 2015-03-16 US US14/658,718 patent/US20150260073A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762050A (en) * | 2015-11-20 | 2017-05-31 | 罗伯特·博世有限公司 | Integrated form exhaust gas aftertreatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201404786D0 (en) | 2014-04-30 |
| US20150260073A1 (en) | 2015-09-17 |
| GB2524258A (en) | 2015-09-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20180105 |