CN109322730A - Light-duty six diesel vehicle after-treatment system of state - Google Patents
Light-duty six diesel vehicle after-treatment system of state Download PDFInfo
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- CN109322730A CN109322730A CN201811504232.5A CN201811504232A CN109322730A CN 109322730 A CN109322730 A CN 109322730A CN 201811504232 A CN201811504232 A CN 201811504232A CN 109322730 A CN109322730 A CN 109322730A
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- Prior art keywords
- laid
- duty
- light
- downstream
- preprocessor
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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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
-
- 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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- 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
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention discloses a kind of light-duty six diesel vehicle after-treatment systems of state.The light-duty six diesel vehicle after-treatment system of state includes: first choice catalysis reductor, is laid in the downstream of booster, SCR temperature sensor before being provided therebetween；Diesel oil oxidation type catalyst converter is laid in the downstream of the first choice catalysis reductor；Catalytic type grain catcher is laid in the downstream of the diesel oil oxidation type catalyst converter；4th preprocessor, is the second selective catalytic reduction device or the escaping of ammonia catalyst converter, and the 4th preprocessor is laid in the downstream of the catalytic type grain catcher；And urea injector, there are two urea nozzles for tool, are laid in front of the first choice catalysis reductor and before the 4th preprocessor respectively.The exhaust turbulent flow that engine body is preferably utilized in the light-duty six diesel vehicle after-treatment system of state carrys out mixing urea solution, simplifies the design of mixer, reduces costs.
Description
Technical field
The present invention relates to engine arts, especially with regard to a kind of light-duty six diesel vehicle after-treatment system of state.
Background technique
Current light-duty six diesel vehicle after-treatment system of state mainly uses: DOC+SCRF+SCR/ASC.Since Light-duty Vehicle is started
The reasons such as cabin space is small, and arrangement space is narrow will use DOC+SCRF close coupling, and on the engine, SCR/ASC is arranged arrangement
On vehicle chassis, i.e. (DOC+SCRF) close coupling+SCR/ASC.A urea is arranged between close coupling part DOC and SCRF
Nozzle carrys out NOX in cleaning of off-gas.
Existing technical solution has following disadvantage:
1), arrangement of nozzles is between DOC and SCRF, in order to which aqueous solution of urea and tail gas are sufficiently mixed, certainly will will in DOC and
Increase by one section of mixer between SCRF.The length of close coupling part is obviously increased, the principle phase small in size with light duty engine
It is contrary to, causes preprocessor arrangement difficulty very big.
2), using SCRF unit, i.e., SCR catalyst coating is coated on DPF carrier, coating material is more thicker, passively again
The rate that comes into force reduces, and carbon deposition quantity increases.For a long time, the back pressure of SCRF unit increases.
3), SCRF unit passive regeneration low efficiency, carbon deposition quantity are high, and since regeneration temperatures are higher, and traditional scheme is again
Raw process need to occur to easily cause SCR catalyst aging in SCRF unit, shorten the service life.
4) after, SCRF unit is arranged in DOC unit, temperature rise is slower, especially when engine just starts, catalytic performance phase
To poor, vent gas treatment efficiency is lower.
5), not only back pressure is big for SCRF unit, but also passive regeneration efficiency is again low, and initiative regeneration is more frequent, so that oil consumption
It is higher.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
The purpose of the present invention is to provide a kind of simple and reasonable six diesel vehicle after-treatment systems of light-duty state, this is light-duty
Six diesel vehicle after-treatment system of state not only has the advantages that small in size, suitability is strong, but also engine body is preferably utilized
Exhaust turbulent flow carry out mixing urea solution, simplify the design of mixer, reduce costs.
To achieve the above object, the present invention provides a kind of light-duty six diesel vehicle after-treatment systems of state, comprising: first choice
Property catalysis reductor, be laid in the downstream of booster, SCR temperature sensor before being provided therebetween；Diesel oil oxidation type is urged
Change device, is laid in the downstream of the first choice catalysis reductor, temperature sensor before DOC is provided therebetween；It urges
Change type grain catcher is laid in the downstream of the diesel oil oxidation type catalyst converter, temperature sensing after DOC is provided therebetween
Device；4th preprocessor, is the second selective catalytic reduction device or the escaping of ammonia catalyst converter, and the 4th preprocessor is laid in institute
The downstream for stating catalytic type grain catcher, temperature sensor before rear SCR is provided therebetween, under the 4th preprocessor
Trip is laid with temperature sensor and NO after rear SCRXSensor；And urea injector, there are two urea nozzle, difference cloth for tool
It is located at before the first choice catalysis reductor and before the 4th preprocessor.
In a preferred embodiment, NO is additionally provided between first choice catalysis reductor and boosterX/O2It passes
Sensor.
In a preferred embodiment, the both ends of catalytic type grain catcher are connect with differential pressure pickup respectively.
In a preferred embodiment, selective catalytic reduction device, diesel oil oxidation type catalyst converter, catalytic type granule capturing
Device is arranged on the engine in such a way that three sections tightly coupled.
In a preferred embodiment, the 4th preprocessor is arranged on vehicle chassis.
Compared with prior art, six diesel vehicle after-treatment system of light-duty state according to the present invention has the following beneficial effects:
1, the mixer between DOC and SCRF is saved, total volume reduces, and suitability is stronger.
2, the exhaust turbulent flow that engine body is utilized carrys out mixing urea aqueous solution, simplifies the design of mixer, reduces
Cost.3, using CDPF unit, it is not coated with SCR washcoat above, passive regeneration is more efficient, and back pressure reduces.
4, SCR unit mentions foremost, and temperature rise is very fast, and WLTC cycle efficieny is higher.
5, SCR catalyst is in DPF unit, avoids the high temperature of regenerative process, and SCR catalyst stability is more preferable, the longevity
It orders longer.
6, CDPF unit is small with respect to SCRF unit back pressure, and passive regeneration is more efficient, and initiative regeneration frequency is lower, so oily
It consumes lower.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of six diesel vehicle after-treatment system of light-duty state according to an embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1, the carrier element arrangement of six diesel vehicle after-treatment system of light-duty state of the invention is SCR+DOC
+ CDPF+SCR/ASC, and a nozzle is respectively arranged before forward and backward SCR.The specific knot of the light-duty six diesel vehicle after-treatment system of state
Structure include: selective catalytic reduction device (SCR) 1, diesel oil oxidation type catalyst converter (DOC) 2, catalytic type grain catcher (CDPF) 3,
4th preprocessor 4 and urea injector 5, wherein first choice is catalyzed reductor 1, diesel oil oxidation type catalyst converter 2, catalysis
Type grain catcher 3, the 4th preprocessor 4 are successively set on the exhaust system downstream of engine body, and the two of urea injector 5
A urea nozzle is laid in respectively before first choice catalysis reductor 1 and before the 4th preprocessor 4, carrys out NO in cleaning of off-gasX。
Before SCR is mentioned DOC by the light-duty six diesel vehicle after-treatment system of state, SCRF is changed to CDPF, and use two nozzles, filled up
The deficiency of existing scheme.Not only have the advantages that small in size, suitability is strong, but also the exhaust of engine body is preferably utilized
Turbulent flow carrys out mixing urea solution, simplifies the design of mixer, reduces costs.Have simultaneously by pressure is small, the service life is long, efficiency
High, fuel-efficient advantage.It is with the obvious advantage compared with existing legacy system, the characteristics of being very suitable to light-duty diesel engine.
Specifically, first choice catalysis reductor 1 is laid in the downstream of booster 6, and NO is provided therebetweenX/O2
Sensor 11 and preceding SCR temperature sensor 12.First choice catalysis reductor 1 mentions light-duty six diesel vehicle of the state post-processing system
The foremost of system, temperature rise is very fast, and WLTC cycle efficieny is higher.
Diesel oil oxidation type catalyst converter 2 is laid in the downstream of first choice catalysis reductor 1, and DOC is provided therebetween
Preceding temperature sensor 21.
Catalytic type grain catcher 3 is laid in the downstream of diesel oil oxidation type catalyst converter 2, and temperature after DOC is provided therebetween
Spend sensor 31.Catalytic type grain catcher 3 is small with respect to SCRF unit back pressure, and passive regeneration is more efficient, initiative regeneration frequency
It is lower, so oil consumption is lower.Using catalytic type grain catcher 3, it is not coated with SCR washcoat above, passive regeneration is more efficient,
Back pressure reduces.
Preferably, the both ends of catalytic type grain catcher 3 are connect with differential pressure pickup 32 respectively.
4th preprocessor 4 is the second selective catalytic reduction device (SCR) or the escaping of ammonia catalyst converter (ASC), is laid in and urges
Temperature sensor 41 before rear SCR, the downstream cloth of the 4th preprocessor 4 are provided therebetween in the downstream of change type grain catcher 3
Equipped with temperature sensor 42 and NO after rear SCRXSensor 43.
There are two urea nozzles for the tool of urea injector 5, are laid in front of first choice catalysis reductor 1 and after the 4th respectively
Before processor 4, carry out NO in cleaning of off-gasX, i.e., when engine temperature is lower, it is water-soluble that close coupling part front nozzle sprays urea
Liquid restores NO in the SCR unit of close coupling partX；After engine temperature increases, it is water-soluble that chassis SCR front nozzle sprays urea
Liquid restores NO in chassis portion SCR unitX.The exhaust turbulent flow that engine body is utilized carrys out mixing urea aqueous solution, simplifies
The design of mixer, reduces costs.
Preferably, it arranges for convenience, selective catalytic reduction device 1 can also be used, diesel oil oxidation type catalyst converter 2, urged
3 three sections of tightly coupled modes of change type grain catcher arrange that on the engine the 4th preprocessor 4 is arranged on vehicle chassis,
That is (SCR+DOC+CDPF) close coupling+SCR/ASC.
To sum up, before SCR by being mentioned DOC by the light-duty six diesel vehicle after-treatment system of state, SCRF is changed to CDPF, and
Using two nozzles, not only have the advantages that small in size, suitability is strong, but also the exhaust that engine body is preferably utilized is disorderly
Stream carrys out mixing urea solution, simplifies the design of mixer, reduces costs.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (5)
1. a kind of six diesel vehicle after-treatment system of light-duty state characterized by comprising
First choice is catalyzed reductor, is laid in the downstream of booster, SCR temperature sensor before being provided therebetween；
Diesel oil oxidation type catalyst converter is laid in the downstream of the first choice catalysis reductor, DOC is provided therebetween
Preceding temperature sensor；
Catalytic type grain catcher is laid in the downstream of the diesel oil oxidation type catalyst converter, and temperature after DOC is provided therebetween
Spend sensor；
4th preprocessor, is the second selective catalytic reduction device or the escaping of ammonia catalyst converter, and the 4th preprocessor is laid in
Temperature sensor before rear SCR is provided therebetween in the downstream of the catalytic type grain catcher, the 4th preprocessor
Downstream is laid with temperature sensor and NO after rear SCRXSensor；And
Urea injector, tool are laid in front of the first choice catalysis reductor and the 4th respectively there are two urea nozzle
Before preprocessor.
2. light-duty six diesel vehicle after-treatment system of state as described in claim 1, which is characterized in that the first choice catalysis
NO is additionally provided between reductor and boosterX/O2Sensor.
3. light-duty six diesel vehicle after-treatment system of state as claimed in claim 2, which is characterized in that the catalytic type granule capturing
The both ends of device are connect with differential pressure pickup respectively.
4. light-duty six diesel vehicle after-treatment system of state as described in claim 1, which is characterized in that the selective catalytic reduction
Device, diesel oil oxidation type catalyst converter, catalytic type grain catcher are arranged on the engine in such a way that three sections tightly coupled.
5. light-duty six diesel vehicle after-treatment system of state as claimed in claim 4, which is characterized in that the 4th preprocessor cloth
It sets on vehicle chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504232.5A CN109322730A (en) | 2018-12-10 | 2018-12-10 | Light-duty six diesel vehicle after-treatment system of state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504232.5A CN109322730A (en) | 2018-12-10 | 2018-12-10 | Light-duty six diesel vehicle after-treatment system of state |
Publications (1)
| Publication Number | Publication Date |
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| CN109322730A true CN109322730A (en) | 2019-02-12 |
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ID=65256735
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|---|---|---|---|
| CN201811504232.5A Pending CN109322730A (en) | 2018-12-10 | 2018-12-10 | Light-duty six diesel vehicle after-treatment system of state |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792488A (en) * | 2019-09-29 | 2020-02-14 | 江铃汽车股份有限公司 | Exhaust aftertreatment system meeting national sixth requirement of light-duty diesel vehicle |
| WO2020215303A1 (en) * | 2019-04-26 | 2020-10-29 | 潍柴动力股份有限公司 | Post-treatment system, method for controlling post-treatment system, and vehicle |
| CN112664304A (en) * | 2020-12-14 | 2021-04-16 | 广西玉柴机器股份有限公司 | Take six engine structures in state of tertiary aftertreatment |
| CN114233440A (en) * | 2021-12-17 | 2022-03-25 | 潍柴动力股份有限公司 | Urea double-injection aftertreatment system, control method thereof and vehicle |
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