CN110259549A - Control device and method for diesel engine SCR system - Google Patents
Control device and method for diesel engine SCR system Download PDFInfo
- Publication number
- CN110259549A CN110259549A CN201810198814.9A CN201810198814A CN110259549A CN 110259549 A CN110259549 A CN 110259549A CN 201810198814 A CN201810198814 A CN 201810198814A CN 110259549 A CN110259549 A CN 110259549A
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- pump
- control device
- mode
- predetermined value
- idle
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Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 50
- 239000007924 injection Substances 0.000 claims abstract description 50
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000004202 carbamide Substances 0.000 claims abstract description 36
- 239000007864 aqueous solution Substances 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 239000003054 catalyst Substances 0.000 claims description 15
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 2
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 9
- 230000008859 change Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- 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
Abstract
This application discloses control device and method and using its diesel engine SCR system, the SCR system includes the pump (400) for aqueous solution of urea pressurization to be supplied to injection unit (300), the control device (100) is connected with described pump (400) data, wherein, the control device (100) selectively makes the pump (400) enter " idle " mode, in " idle " mode, the pump (400) is so that the pressure in the fluid circuit pumped between (400) and the injection unit (300) is run lower than aqueous solution of urea from the mode of pressure needed for the injection unit (300) injection.
Description
Technical field
The application relates generally to the control device and method for diesel engine SCR system.
Background technique
For environmental grounds, selective catalytic reduction (SCR) system is widely used in diesel vehicle at present to engine exhaust
It is handled.SCR system includes aqueous solution of urea injection unit, and foundation needs the nozzle through aqueous solution of urea injection unit to hair
Aqueous solution of urea is sprayed in motivation exhaust pipe, to close via the nitrogen oxidation in the SCR catalyst and engine exhaust of SCR system
Object reacts, and harmless treatment is done to it and the external world is discharged.
In general, a period of time after the start of engine, the hydraulic pump startup of SCR system, in the inside stream of SCR system
High pressure is established in body pipeline.In this way, even if the nozzle of aqueous solution of urea injection unit is when closed, the internal flow of SCR system
Pipeline also keeps internal high pressure, so that the opening and closing degree for only needing to control nozzle in injection can easily control urea water
The amount of injection of solution, and then control SCR reaction process.In general, after the temperature in the exhaust pipe of engine reaches certain value, nozzle
Injection aqueous solution of urea can be opened, to activate SCR to react.
But in cold winter, although SCR system has been switched on, when the temperature in exhaust pipe is below standard, nozzle is
It must shut off.Although under the action of the hydraulic pump of aqueous solution of urea injection unit, urea is water-soluble at this point, nozzle is closed
Pressure of the liquid in fluid circuit is still very high.In this way, aqueous solution of urea is often seeped from nozzle under the action of high pressure
Out, and crystallization is generated, and then influences the control of subsequent SCR reaction.This unfavorable phenomenon is outstanding for small displacement diesel vehicle
It is obvious.
In addition, hydraulic pump always operates in order to maintain high pressure, energy consumption is also unnecessarily increased.
Summary of the invention
In view of the above problems, the application is directed to a kind of improved SCR control device and method, to improve SCR system
The operational reliability of system.
According to the one aspect of the application, a kind of control device for diesel engine SCR system is provided, it is described
SCR system includes the pump for aqueous solution of urea pressurization to be supplied to injection unit, the control device and the Pump data phase
Even, wherein the control device selectively makes the pump enter " idle " mode, in " idle " mode, the pump
So that described pump is lower than aqueous solution of urea from the injection unit the pressure in the fluid circuit between the injection unit
The mode of pressure needed for injection is run.
According to further aspect of the application, a kind of control method for diesel engine SCR system is additionally provided,
In, the SCR system includes the pump for aqueous solution of urea pressurization to be supplied to injection unit, which comprises
Selectivity makes the pump enter " idle " mode, and in " idle " mode, the pump is so that the pump
The pressure in fluid circuit between the injection unit sprays required pressure from the injection unit lower than aqueous solution of urea
The mode of power is run.
According to further aspect of the application, a kind of diesel engine SCR system is additionally provided, including aqueous solution of urea is deposited
Reservoir, the injection unit for selectively spraying aqueous solution of urea in the exhaust pipe to diesel vehicle and for by urea it is water-soluble
Liquid is supplied to the pump of injection unit from memory pressurization, wherein the SCR system further includes control device above-mentioned.
Using the above-mentioned technological means of the application, while saving energy consumption also by aqueous solution of urea oozed out from nozzle can
Energy property minimizes.In addition, nozzle crystalline polamer can be effectively inhibited, the job stability of SCR system is improved.
Detailed description of the invention
The aforementioned and other side of the application will be more fully understood from aftermentioned detailed description and in conjunction with following attached drawing
Face.It should be pointed out that the ratio of each attached drawing is possible to different for clearly explained purpose, but this will not influence to this
The understanding of application.In the accompanying drawings:
Fig. 1 diagrammatically illustrates to use to be shown according to the simplification of the diesel engine SCR system of the control device of the application
It is intended to；
Fig. 2 is diagrammatically illustrated detects Tail Pipe Temperature not equality of temperature obtained for diesel vehicle within the bimestrial time
Spend the bar chart of section and corresponding Annual distribution ratio；
Fig. 3 diagrammatically illustrates the flow chart of the control method according to the application one embodiment；And
Fig. 4 is diagrammatically illustrated when being controlled using the control method or device of the application the SCR system of diesel vehicle
Pressure change and pump power in fluid circuit change.
Specific embodiment
In each attached drawing of the application, structure is identical or intimate feature is indicated by the same numbers.
Fig. 1 diagrammatically illustrates the rough schematic view of diesel engine SCR system, and basis is used in the SCR system
The control device 100 of the application.Specifically, SCR system mainly includes aqueous solution of urea memory 200, is used for diesel engine
Selectively sprayed in the exhaust pipe 500 of machine aqueous solution of urea injection unit 300 and for by aqueous solution of urea from memory
200 pressurizations are supplied to the pump 400 of injection unit 300.In addition to this, SCR system further includes the SCR arranged in exhaust pipe 500
Catalyst converter (not shown).Memory 200 and pump 400 between and injection unit 300 and pump 400 between via fluid circuit
Connection.Injection unit 300 includes the nozzle extended at least partially into exhaust pipe 500.
Control device 100 for example can be the electronic control unit in individual electronic control unit either SCR system.
The computer instruction for being able to carry out the control method according to the application is stored in control device 100.Control device 100 and pump
400 are connected with 300 data of injection unit, for accordingly being controlled them.For example, the instruction based on control device 100, pump
400, which can star or close or adjust the operation power of pump and/or the jet hole of injection unit 300, to be opened and closed.
It there also is provided temperature sensor 600 in exhaust pipe 500.Temperature sensor 600 can be any in exhaust pipe 500
Need to detect the position setting of temperature, such as the setting of SCR catalyst upstream, so as to detect the exhaust gas temperature in exhaust pipe 500
Degree.The detection signal of temperature sensor 600 can send control device 100 to, so as to subsequent analysis.
In current SCR system, after diesel vehicle starting, only the exhaust gas temperature in exhaust pipe 500 reaches pump 400
After the start-up temperature that works, the just starting operation of pump 400, the fluid pressure in fluid circuit to realize 300 upstream of injection unit
Power accumulation.Then, even if the exhaust gas temperature in exhaust pipe 500 declines, pump 400 will not be actively out of service, so that fluid hose
High pressure is maintained in road.In this way, although the exhaust gas temperature in exhaust pipe 500 is possible to have not yet been reached what SCR catalyst can work
Temperature, but pump the aqueous solution of urea for filling in the fluid circuit between 400 and injection unit 300 and maintaining constant high-pressure.
Therefore, up to standard (that is, meeting the work temperature of SCR catalyst with the exhaust gas temperature in exhaust pipe 500 after diesel engine starting
Degree) between this period in, high pressure urea aqueous solution probably due to high pressure from the nozzle of injection unit 300 ooze out.This
It is higher that the section time continues a possibility that more growing, then ooze out.
In the context of this application, the operating temperature of SCR catalyst refer to aqueous solution of urea can be via SCR
Catalyst converter reacts with the oxynitrides in engine exhaust, and SCR catalyst needs temperature to be achieved.
It for light-duty diesel vehicle, is operated normally in the bimestrial time in winter, applicant tests from diesel engine
Start the Annual distribution range of the intratracheal different temperature zones of heel row, as a result as shown in Figure 2.For most of SCR catalysts,
It just can work normally (that is, operating temperature=190 DEG C of SCR catalyst) after the temperature in exhaust pipe reaches 190 DEG C or more.
That is, at least 65% Annual distribution ratio, although injection unit 300 cannot work, pump 400 and injection unit
High pressure conditions must be maintained in fluid circuit between 300.This not only adds energy consumption, high pressure also add aqueous solution of urea from
A possibility that nozzle oozes out.
Fig. 3 diagrammatically illustrates the flow chart of the control method according to the application one embodiment.In step S10, enter
Control process.For example, having been turned in pump 400 and establishing foot in the fluid circuit of 300 upstream of injection unit
After enough pressure build-up, so that it may start step S10.In step slo, a counter t can be reset into (t=0).In step
Rapid S20 detects the exhaust gas temperature in exhaust pipe 500.It is urged for example, can use sensor 600 and detect 500 inside SCR of exhaust pipe
Change the exhaust gas temperature of device upstream.In step S30, whether judge in step S20 determining temperature less than a predetermined value T2, for example,
T2 can be between 125 DEG C and 150 DEG C.If it is judged that being "No", then step S25 is gone to, in the step, counter t
Continue to be zeroed (t=0)；If it is judged that being "Yes", then step S35 is gone to.Add (a t=t+ in step S35, counter t
1).Then, in step S40, judge whether the current value of counter t has been above a scheduled limit value tlim.If step S40
Judging result be "No", then go to step S20.If the judging result of step S40 is "Yes", step S50 is gone to.Step
The purpose of S25, S30, S35 and S40 prevents pump 400 from excessively frequently entering as described below " not busy primarily to avoid judging by accident
Set " mode.By the setting of these steps, it is predetermined that one is continued above the case where measured exhaust gas temperature is less than predetermined value T2
Period after, just make pump 400 enter " idle " modes.If the duration is not enough or midway exhaust gas temperature is higher than predetermined
Value will not then make pump 400 enter " idle " mode.
In step S50, so that pump 400 enters " idle " mode.According to the context of the application, " idle " mode is referred to
Pump 400 is to ensure that SCR system various aspects work normally the state that permitted minimum power remains operational, to exist with pump 400
Its normal mode is compared when running, and can keep relatively low fluid in the fluid circuit between pump 400 and injection unit 300
Pressure, so that aqueous solution of urea minimizes a possibility that exudation from the nozzle of injection unit 300, i.e., Fluid pressure is lower than urine
Plain aqueous solution sprays required pressure from injection unit 300.That is, pump 400 is so that pump 400 in " idle " mode
The pressure in fluid circuit between injection unit 300 sprays required pressure from injection unit 300 lower than aqueous solution of urea
Mode run.Then, temperature measurement is carried out as in step S20 in step S55 continuation.In step S60, judge in step
Whether the temperature that S55 is determined is greater than a predetermined value T1 (> T2), for example, T1 can be between 180 DEG C and 200 DEG C.If it is determined that
As a result it is "No", then is back to step S50；If it is judged that being "Yes", then step S70 is gone to.In step S70, pump 400 is extensive
It answers to its normal mode, such as can be with capacity operation, so that the aqueous solution of urea in fluid circuit reaches defined high pressure.
In this way, can prepare starting to injection unit 300 from diesel engine in this period between spraying, pump 400 to be simultaneously
High pressure conditions are also not always always at the Fluid pressure in full power state operation and fluid circuit, therefore are being saved
A possibility that also oozing out aqueous solution of urea from nozzle while saving energy consumption minimizes.
It will be apparent to those skilled in the art that accordingly can be further omitted according to situation step S30 and/or S40.Example
Such as, after having established enough pressure build-up in the fluid circuit of 300 upstream of injection unit, it is directly entered step S50.This
Outside, the selection of predetermined value T1 is related with the operating temperature of SCR catalyst employed in SCR system.
Fig. 4 is diagrammatically illustrated when being controlled using the control method or device of the application the SCR system of diesel vehicle
The pressure history and pump power change curve measured in exhaust pipe.From fig. 4, it can be seen that within the period from 0 to t2,
The power curve 1 of pump 400 maintains minimum Wmin, and the pressure curve 2 in fluid circuit also remains lower, that is, pumps 400 and enter
" idle " mode.Since the t2 moment, in the case that the judging result of step S60 for example, in fig. 3 is "Yes", pump 400 from
" idle " mode exits and enters normal mode, and within the period of Δ t (about=2 second), pump 400 is with full power Wmax fortune
Row pumps 400 later and operates normally according to the power needed, so that fluid so that the pressure in fluid circuit increases sharply
Pressure in pipeline maintains the pressure for allowing aqueous solution of urea to be capable of normal injection in the case where nozzle is opened.It can from Fig. 4
To find out, using the control device or method of the application, obvious postpone can't be caused to the operation of the pump of SCR system, also
Even if being to say also keep the smooth operation of original SCR system with using the control device or system of the application.
Although specific implementations of the present application are described in detail here, they are used for the purpose of the purpose explained and give
Out, and it is not considered that they are construed as limiting scope of the present application.In addition, it will be apparent to those skilled in the art that this explanation
Each embodiment described in book can be applied in combination each other.It is various under the premise of not departing from the application spirit and scope
Replacement, change and transformation can be contemplated out.
Claims (19)
1. a kind of control device (100) for diesel engine SCR system, the SCR system includes for urea is water-soluble
Liquid pressurization is supplied to the pump (400) of injection unit (300), and the control device (100) is connected with described pump (400) data,
In, the control device (100) selectively makes the pump (400) enter " idle " mode, in " idle " mode, institute
Pump (400) is stated so that the pressure in the fluid circuit pumped between (400) and the injection unit (300) is lower than urea water
Solution is run from the mode of pressure needed for the injection unit (300) injection.
2. control device (100) according to claim 1, which is characterized in that based on useless in the exhaust pipe of engine (500)
Gas measured temperature, the control device (100) enable to the pump (400) to enter and/or exit described " idle " mode.
3. control device (100) according to claim 2, which is characterized in that the exhaust gas temperature measured value is utilized in institute
State temperature sensor (600) acquisition that the SCR catalyst upstream of the SCR system is arranged in exhaust pipe (500).
4. control device (100) according to claim 2 or 3, which is characterized in that be less than in the exhaust gas temperature measured value
When one predetermined value (T2), the control device (100) makes " idle " mode described in pump (400) entrance.
5. control device (100) according to claim 2 or 3, which is characterized in that be less than in the exhaust gas temperature measured value
When the case where one predetermined value (T2), is continued above a predetermined time value, the control device (100) make the pump (400) into
Enter described " idle " mode.
6. control device (100) according to claim 4 or 5, which is characterized in that the predetermined value (T2) is at 125 DEG C
Between 150 DEG C.
7. according to any control device (100) of claim 4 to 6, which is characterized in that in the exhaust gas temperature measured value
When greater than another predetermined value (T1), the control device (100) makes the pump (400) exit described " idle " mode, wherein
Another predetermined value (T1) is greater than the predetermined value (T2).
8. control device (100) according to claim 7, which is characterized in that another predetermined value (T1) is at 180 DEG C
Between 200 DEG C.
9. control device (100) according to claim 7 or 8, which is characterized in that another predetermined value (T1) with it is described
The operating temperature of the SCR catalyst of SCR system is related.
10. a kind of control method for diesel engine SCR system, wherein the SCR system includes for urea is water-soluble
Liquid pressurization is supplied to the pump (400) of injection unit (300), which comprises
Selectivity make the pump (400) entrance " idle " mode, in " idle " mode, the pump (400) so that
The pressure in fluid circuit between the pump (400) and the injection unit (300) is lower than aqueous solution of urea from the injection
The mode of pressure needed for unit (300) injection is run.
11. control method according to claim 10, which is characterized in that based on the exhaust gas in the exhaust pipe of engine (500)
Measured temperature, so that the pump (400) enters or exit described " idle " mode.
12. control method according to claim 11, which is characterized in that the exhaust gas temperature measured value is utilized in the row
The temperature sensor (600) that the SCR catalyst upstream of the SCR system is arranged in tracheae (500) obtains.
13. control method according to claim 11 or 12, which is characterized in that in the exhaust gas temperature measured value less than one
When predetermined value (T2), so that " idle " mode described in the pump (400) entrance.
14. control method according to claim 11 or 12, which is characterized in that in the exhaust gas temperature measured value less than one
When the case where predetermined value (T2) is continued above a predetermined time value, so that " idle " mode described in the pump (400) entrance.
15. control method described in 3 or 14 according to claim 1, which is characterized in that the predetermined value (T2) be 125 DEG C with
Between 150 DEG C.
16. 3 to 15 any control method according to claim 1, which is characterized in that big in the exhaust gas temperature measured value
When another predetermined value (T1), so that the pump (400) exits described " idle " mode, wherein another predetermined value (T1) is big
In the predetermined value (T2).
17. control method according to claim 16, which is characterized in that another predetermined value (T1) be 180 DEG C with
Between 200 DEG C.
18. control method according to claim 16 or 17, which is characterized in that another predetermined value (T1) with it is described
The operating temperature of the SCR catalyst of SCR system is related.
19. a kind of diesel engine SCR system, including aqueous solution of urea memory (200), for the exhaust pipe to diesel vehicle
(500) selectively sprayed in aqueous solution of urea injection unit (300) and for by aqueous solution of urea from memory (200)
Pressurization is supplied to the pump (400) of injection unit (300), which is characterized in that the SCR system further includes according to claim 1 to 9
Any control device (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810198814.9A CN110259549A (en) | 2018-03-12 | 2018-03-12 | Control device and method for diesel engine SCR system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810198814.9A CN110259549A (en) | 2018-03-12 | 2018-03-12 | Control device and method for diesel engine SCR system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110259549A true CN110259549A (en) | 2019-09-20 |
Family
ID=67911408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810198814.9A Pending CN110259549A (en) | 2018-03-12 | 2018-03-12 | Control device and method for diesel engine SCR system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110259549A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103717850A (en) * | 2011-08-05 | 2014-04-09 | 坦尼科汽车操作有限公司 | Reductant injection control system |
| CN104912636A (en) * | 2015-05-22 | 2015-09-16 | 中国汽车技术研究中心 | Diesel engine aftertreatment SCR control device and method |
-
2018
- 2018-03-12 CN CN201810198814.9A patent/CN110259549A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103717850A (en) * | 2011-08-05 | 2014-04-09 | 坦尼科汽车操作有限公司 | Reductant injection control system |
| CN104912636A (en) * | 2015-05-22 | 2015-09-16 | 中国汽车技术研究中心 | Diesel engine aftertreatment SCR control device and method |
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