CN107044322B - A kind of urea nozzle blocks the control method of removing and judgement nozzle damage - Google Patents
A kind of urea nozzle blocks the control method of removing and judgement nozzle damage Download PDFInfo
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- CN107044322B CN107044322B CN201611219568.8A CN201611219568A CN107044322B CN 107044322 B CN107044322 B CN 107044322B CN 201611219568 A CN201611219568 A CN 201611219568A CN 107044322 B CN107044322 B CN 107044322B
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- Prior art keywords
- nozzle
- aperture
- urea
- equal
- damage
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Classifications
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- 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
- F01N9/00—Electrical control of exhaust gas treating 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
- 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
- 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
- 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
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
A kind of urea nozzle blocks the control method and corresponding control system of removing and judgement nozzle damage, the control method that the control system executes includes controller with the one setting time T of plunger high-speed motion of given frequency electric current P driving nozzle solenoid valve, then judges whether nozzle demand aperture is equal with practical aperture；If demand aperture is equal with practical aperture, determine that blocking is removed；Urea nozzle can normal use；If demand aperture and practical aperture are unequal, execution recycles next time, and after executing n times circulation, if n-th determines that nozzle demand aperture and practical aperture are still unequal, controller exports urea nozzle damage instruction, determines urea nozzle damage.By above-mentioned determination method, the unnecessary loss of enterprise can be reduced to avoid intact nozzle is mistaken for failure part in the market.It can be prevented with simple means, solve Nozzle failures caused by blocking because of urea crystals.
Description
Technical field
The present invention relates to engine art, in particular to tail gas air cleaning post-processes field.
Background technique
Selective catalytic reduction (Selective Catalytic Reduction, SCR): is eliminated in diesel exhaust gas
A kind of post-processing technology of nitrogen oxides.Its working principle is that: control system receives engine condition signal, and calculates drop in real time
NO in low exhaustXThe urea injecting quantity of demand；Urea injection system pressurizes urea, and accurately by a certain amount of urea liquid
It sprays into exhaust pipe；Urea droplets resolve into NH in catalyst reduction system3, and by the NO in tail gasXIt is reduced into N2And H2O。
SCR spraying system mainly includes urea box, urea pump, urea nozzle and connecting line composition, spraying system nozzle
Quality have important influence to the performance of system, the amount of injection is higher to will lead to NH3It leaks excessively high, causes secondary environmental pollution,
The cost that the risk and client for increasing system crystallization simultaneously use；The relatively low system reducing efficiency that will lead to of the amount of injection is lower, NOx row
It puts and is not able to satisfy design object.The nozzle of SCR spraying system is the key index for evaluating its performance, efficiently, accurately measures dress
It sets and method is the necessary condition for guaranteeing to objectively evaluate spraying system.
In use process, when there is residual urea crystallization or remaining impurity inside urea nozzle, urea spray will lead to
Nozzle aperture blocking, to influence the injection and control of urea.And since these crystallizations and impurity are in nozzle interior, compare and is difficult to clearly
Reason.
Summary of the invention
In order to overcome the drawbacks described above of the prior art, the present invention proposes a kind of detection of nozzle interior blocking, sweep-out method
And the control device that this method uses.
An object of the present invention is achieved through the following technical solutions.
A kind of urea nozzle blocks the control method of removing and judgement nozzle damage, and the control method includes walking as follows
It is rapid:
S1: controller drives the one setting time T1 of plunger high-speed motion of nozzle solenoid valve with a given frequency electric current P1,
Then judge whether nozzle demand aperture is equal with practical aperture；If demand aperture is equal with practical aperture, determine that blocking is removed；
Urea nozzle can normal use；
S2: if demand aperture and practical aperture are unequal, using S1 step as the 1st cycle criterion step, S1 step is repeated
Suddenly to n-th, last time given frequency electric current PN, setting time TN；It is every to execute once, first judge nozzle demand aperture
It is whether equal with practical aperture, if demand aperture is equal with practical aperture, determine that blocking is removed；Urea nozzle can normal use,
Finishing control process, if demand aperture and practical aperture are unequal, execution recycles next time, and wherein N is the circulation being set in advance
Determine number；
S3: if S2 step n-th determines that nozzle demand aperture and practical aperture are unequal, controller exports urea nozzle
Damage instruction determines urea nozzle damage.
Further, the N is more than or equal to 3.
It is preferred that the N is equal to 3.
Further, P1-PNFrequency values it is equal, and much larger than urea injection when frequency；
Further, P1-PNFrequency values it is incremented by successively.
Further, T1-TNNumerical value it is equal.
Further, T1-TNNumerical value it is incremented by successively.
It is of the invention that the second object of the present invention is to be achieved through the following technical solutions.
A kind of urea nozzle control system, the control system mainly include power supply, display, urea nozzle and control
Device, the power supply, display, urea nozzle pass through cable and are electrically connected with the controller to realize mutually communication；Wherein controller
In be integrated with the control program of urea nozzle, the unlatching Operating In Persistent Current Mode of urea nozzle may be implemented；Wherein display real time monitoring,
Recording nozzles aperture state；The above-mentioned component of the control system and control program are disposed for executing above-mentioned urea nozzle stifled
The control method of nozzle damage is removed and determined to plug.
The present invention has the advantages that
1, by above-mentioned determination method, enterprise can be reduced not to avoid intact nozzle is mistaken for failure part in the market
Necessary loss.
2, it can be prevented using simple means, solve Nozzle failures caused by blocking because of urea crystals.
3, the technological means used is simple and convenient, determines that nozzle damage result is accurate, and removing blocking effect is good, avoids people
Work it is cumbersome, significantly reduction workload, improve efficiency.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 shows the system equipment arrangement schematic diagram of embodiment according to the present invention.
Fig. 2 shows the schematic diagrames of the control method of embodiment according to the present invention.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened is fully disclosed to those skilled in the art.
Embodiment according to the present invention proposes a kind of urea nozzle control system, and the system is as shown in Figure 1, described
Control system mainly includes power supply 1, display 2, urea nozzle 4 and controller 3, the power supply 1, display 2, urea nozzle 4
It is electrically connected with controller 3 by cable to realize mutual communication；The control journey of urea nozzle 4 is wherein integrated in controller 3
The unlatching Operating In Persistent Current Mode of urea nozzle 4 may be implemented in sequence；The wherein real time monitoring of display 2, recording nozzles aperture state.
Using above-mentioned control system, propose that the control method of nozzle damage, institute are removed and determine in a kind of urea nozzle blocking
Detection method is stated to include the following steps:
S1: controller drives the one setting time T1 of plunger high-speed motion of nozzle solenoid valve with a given frequency electric current P1,
Then judge whether nozzle demand aperture is equal with practical aperture；If demand aperture is equal with practical aperture, determine that blocking is removed；
Urea nozzle can normal use；
S2: if demand aperture and practical aperture are unequal, using S1 step as the 1st cycle criterion step, S1 step is repeated
Suddenly to n-th, last time given frequency electric current PN, setting time TN；It is every to execute once, first judge nozzle demand aperture
It is whether equal with practical aperture, if demand aperture is equal with practical aperture, determine that blocking is removed；Urea nozzle can normal use,
Finishing control process, if demand aperture and practical aperture are unequal, execution recycles next time, and wherein N is the circulation being set in advance
Determine number；
S3: if S2 step n-th determines that nozzle demand aperture and practical aperture are unequal, controller exports urea nozzle
Damage instruction determines urea nozzle damage.
Specifically in this embodiment it is preferred that above-mentioned N is 3, P1-PNFrequency values it is equal, and much larger than urea injection when
Frequency；And T1-TNNumerical value it is equal.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (5)
1. the control method of nozzle damage is removed and is determined in a kind of urea nozzle blocking, which is characterized in that the control method packet
Include following steps:
S1: controller is with the one setting time T1 of plunger high-speed motion of given frequency electric current P1 driving nozzle solenoid valve, then
Judge whether nozzle demand aperture is equal with practical aperture；If demand aperture is equal with practical aperture, determine that blocking is removed；Urea
Nozzle can normal use；
S2: if demand aperture and practical aperture are unequal, using S1 step as the 1st cycle criterion step, S1 step is repeated extremely
N-th, last time given frequency electric current PN, setting time TN；It is every to execute once, first judge nozzle demand aperture and reality
Whether border aperture is equal, if demand aperture is equal with practical aperture, determines that blocking is removed；Urea nozzle can normal use, terminate
Control process, if demand aperture and practical aperture are unequal, execution recycles next time, and wherein N is the cycle criterion being set in advance
Number；
S3: if S2 step n-th determines that nozzle demand aperture and practical aperture are unequal, controller exports urea nozzle damage
Instruction determines urea nozzle damage；
The N is more than or equal to 3.
2. the control method of nozzle damage is removed and is determined in urea nozzle blocking as described in claim 1, which is characterized in that P1-
PNFrequency values it is equal, and much larger than urea injection when frequency.
3. the control method of nozzle damage is removed and is determined in urea nozzle blocking as described in claim 1, which is characterized in that P1-
PNFrequency values it is incremented by successively.
4. urea nozzle blocking as claimed in claim 2 or claim 3 removes and determines that the control method of nozzle damage, feature exist
In T1-TNNumerical value it is equal.
5. urea nozzle blocking as claimed in claim 2 or claim 3 removes and determines that the control method of nozzle damage, feature exist
In T1-TNNumerical value it is incremented by successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219568.8A CN107044322B (en) | 2016-12-26 | 2016-12-26 | A kind of urea nozzle blocks the control method of removing and judgement nozzle damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219568.8A CN107044322B (en) | 2016-12-26 | 2016-12-26 | A kind of urea nozzle blocks the control method of removing and judgement nozzle damage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107044322A CN107044322A (en) | 2017-08-15 |
| CN107044322B true CN107044322B (en) | 2019-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611219568.8A Active CN107044322B (en) | 2016-12-26 | 2016-12-26 | A kind of urea nozzle blocks the control method of removing and judgement nozzle damage |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031903B (en) * | 2020-09-10 | 2021-04-02 | 上海星融汽车科技有限公司 | Fault diagnosis method for SCR urea injection device |
| CN114458433B (en) * | 2022-02-16 | 2023-05-23 | 潍柴动力股份有限公司 | Urea nozzle blockage judging method, SCR system and vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101466924A (en) * | 2006-06-26 | 2009-06-24 | 日产柴油机车工业株式会社 | Engine exhaust emission control device |
| CN104100336A (en) * | 2013-04-15 | 2014-10-15 | 现代自动车株式会社 | Method for preventing clogging of urea injection nozzle of SCR system |
-
2016
- 2016-12-26 CN CN201611219568.8A patent/CN107044322B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101466924A (en) * | 2006-06-26 | 2009-06-24 | 日产柴油机车工业株式会社 | Engine exhaust emission control device |
| CN104100336A (en) * | 2013-04-15 | 2014-10-15 | 现代自动车株式会社 | Method for preventing clogging of urea injection nozzle of SCR system |
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| Publication number | Publication date |
|---|---|
| CN107044322A (en) | 2017-08-15 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180903 Address after: 261061 No. 197, Fu Shou street, hi tech Industrial Development Zone, Weifang, Shandong. Applicant after: Weichai Dynamic Co., Ltd. Applicant after: Weichai Power Air Purification Technology Co. Ltd. Address before: 261061 No. 169 Weifang Road, hi tech Zone, Weifang, Shandong Applicant before: Weichai Power Air Purification Technology Co. Ltd. |
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