CN109236439A - A kind of fault detection method and device of double urea nozzle systems - Google Patents
A kind of fault detection method and device of double urea nozzle systems Download PDFInfo
- Publication number
- CN109236439A CN109236439A CN201811136734.7A CN201811136734A CN109236439A CN 109236439 A CN109236439 A CN 109236439A CN 201811136734 A CN201811136734 A CN 201811136734A CN 109236439 A CN109236439 A CN 109236439A
- Authority
- CN
- China
- Prior art keywords
- pump pressure
- minimum
- pump
- pressure
- nozzle
- 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.)
- Granted
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
- 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]
-
- 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
- Y02T10/40—Engine management systems
Abstract
This application discloses the fault detection method and device of a kind of double urea nozzle systems, the fault detection method includes: to close first jet and second nozzle, obtains the target pump pressure of urea pump；It opens first jet and closes second nozzle, obtain the first minimum pump pressure of urea pump within a preset time；It opens second nozzle and closes first jet, obtain the second minimum pump pressure of urea pump within a preset time；First jet and second nozzle are opened, obtains the third minimum pump pressure of urea pump within a preset time；Judge whether pressure pipe blocks according to target pump pressure, the first minimum pump pressure, the second minimum pump pressure and third minimum pump pressure.When the fault detection method is in different conditions by control first jet and second nozzle, the pump pressure of urea pump is repeatedly obtained, can judge whether pressure pipe blocks, realize the detection to pressure pipe stopping state, and detection method is simple and efficient.
Description
Technical field
The present invention relates to pipeline fault detection technique fields, more specifically to a kind of event of double urea nozzle systems
Hinder detection method and device.
Background technique
Double urea nozzle processing systems are mainly used for the emission regulation of requirements at the higher level, are currently in conceptual phase, and correlation is examined
It is disconnected and not perfect.
The case where discharge pressure pipeline being embodied in double urea nozzle processing systems will appear blocking, and at present
The stopping state of discharge pressure pipeline can be detected there is no a perfect technology.
Summary of the invention
In view of this, to solve the above problems, the present invention provide a kind of double urea nozzle systems fault detection method and
Device, technical solution are as follows:
The present invention provides a kind of fault detection method of double urea nozzle systems, double urea nozzle systems include urine
Plain pump, triple valve, first jet and second nozzle, wherein the urea pump, the first jet and the second nozzle pass through
Pressure pipe is connect with the triple valve, and the fault detection method includes:
The first jet and the second nozzle are closed, the target pump pressure of the urea pump is obtained；
It opens the first jet and closes the second nozzle, obtain the urea pump within a preset time first is minimum
Pump pressure；
It opens the second nozzle and closes the first jet, the second of the urea pump is obtained in the preset time
Minimum pump pressure；
The first jet and the second nozzle are opened, the third of the urea pump is obtained in the preset time most
Small pump pressure；
According to target pump pressure, the first minimum pump pressure, the second minimum pump pressure and third minimum pump pressure
Judge whether the pressure pipe blocks.
Preferably, described to open the first jet closing second nozzle, the urea is obtained within a preset time
The minimum pump pressure of the first of pump, comprising:
When the first jet and the second nozzle are in close state, judge whether the pump pressure of the urea pump is steady
It is scheduled on the target pump pressure；
If stablizing, open the first jet and close the second nozzle and start timing, when timing time reaches institute
When stating preset time, first minimum pump pressure of the urea pump in the preset time is obtained.
Preferably, described to open the second nozzle closing first jet, in the preset time described in acquisition
The minimum pump pressure of the second of urea pump, comprising:
Again the first jet and the second nozzle are closed, judges whether the pump pressure of the urea pump is stable in institute
State target pump pressure；
If stablizing, open the second nozzle and close the first jet and start timing, when timing time reaches institute
When stating preset time, second minimum pump pressure of the urea pump in the preset time is obtained.
Preferably, the opening first jet and the second nozzle, obtain the urine in the preset time
The third minimum pump pressure of element pump, comprising:
Again the first jet and the second nozzle are closed, judges whether the pump pressure of the urea pump is stable in institute
State target pump pressure；
If stablizing, open the first jet and the second nozzle and start timing, described in timing time arrival
When preset time, third minimum pump pressure of the urea pump in the preset time is obtained.
Preferably, it is described according to target pump pressure, the first minimum pump pressure, the second minimum pump pressure and described the
Three minimum pump pressures judge whether the pressure pipe blocks, comprising:
It is pumped when the described first minimum pump pressure is equal with the described second minimum pump pressure and is less than the third minimum, and described
When first minimum pump pressure, the second minimum pump pressure and third minimum pump pressure are respectively less than target pump pressure, the pressure
Pipe is in unplugged state；
It is pumped when the described second minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described first
When minimum pump pressure is equal to target pump pressure, the pressure pipe between the triple valve and the first jet is in blocked state；
It is pumped when the described first minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described second
When minimum pump pressure is equal to target pump pressure, the pressure pipe between the triple valve and the second nozzle is in blocked state；
When the described first minimum pump pressure, the second minimum pump pressure, third minimum pump pressure and the target are pumped phase
Whens equal, the pressure pipe between the triple valve and the urea pump is in blocked state or the triple valve and first spray
The pressure pipe between pressure pipe and the triple valve and the second nozzle between mouth is in blocked state.
The present invention also provides a kind of fault detection means of double urea nozzle systems, double urea nozzle systems include
Urea pump, triple valve, first jet and second nozzle, wherein the urea pump, the first jet and the second nozzle are logical
Over-voltage solenoid is connect with the triple valve, and the fault detection means includes:
First execution module obtains the target of the urea pump for closing the first jet and the second nozzle
Pump pressure；
Second execution module is used to open the first jet and closes the second nozzle, obtains institute within a preset time
State the first minimum pump pressure of urea pump；
Third execution module is used to open the second nozzle and closes the first jet, obtains in the preset time
Take the second minimum pump pressure of the urea pump；
4th execution module is used to open the first jet and the second nozzle, obtains in the preset time
The third minimum of the urea pump is pumped；
Judgment module is used to be pumped according to target pump pressure, the first minimum pump pressure, second minimum and described
Third minimum pump pressure judges whether the pressure pipe blocks.
Preferably, the second execution module is used to open the first jet and closes the second nozzle, within a preset time
The specific method for obtaining the first minimum pump pressure of the urea pump includes:
When the first jet and the second nozzle are in close state, judge whether the pump pressure of the urea pump is steady
It is scheduled on the target pump pressure；
If stablizing, open the first jet and close the second nozzle and start timing, when timing time reaches institute
When stating preset time, first minimum pump pressure of the urea pump in the preset time is obtained.
Preferably, third execution module is used to open the second nozzle and closes the first jet, when described default
The specific method of interior the second minimum pump pressure for obtaining the urea pump includes:
Again the first jet and the second nozzle are closed, judges whether the pump pressure of the urea pump is stable in institute
State target pump pressure；
If stablizing, open the second nozzle and close the first jet and start timing, when timing time reaches institute
When stating preset time, second minimum pump pressure of the urea pump in the preset time is obtained.
Preferably, the 4th execution module is used to open the first jet and the second nozzle, in the preset time
The specific method of the interior third minimum pump pressure for obtaining the urea pump includes:
Again the first jet and the second nozzle are closed, judges whether the pump pressure of the urea pump is stable in institute
State target pump pressure；
If stablizing, open the first jet and the second nozzle and start timing, described in timing time arrival
When preset time, third minimum pump pressure of the urea pump in the preset time is obtained.
Preferably, the judgment module is used for according to target pump pressure, the first minimum pump pressure, second minimum
Pump pressure and the third minimum are pumped the specific method for judging whether the pressure pipe blocks
It is pumped when the described first minimum pump pressure is equal with the described second minimum pump pressure and is less than the third minimum, and described
When first minimum pump pressure, the second minimum pump pressure and third minimum pump pressure are respectively less than target pump pressure, the pressure
Pipe is in unplugged state；
It is pumped when the described second minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described first
When minimum pump pressure is equal to target pump pressure, the pressure pipe between the triple valve and the first jet is in blocked state；
It is pumped when the described first minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described second
When minimum pump pressure is equal to target pump pressure, the pressure pipe between the triple valve and the second nozzle is in blocked state；
When the described first minimum pump pressure, the second minimum pump pressure, third minimum pump pressure and the target are pumped phase
Whens equal, the pressure pipe between the triple valve and the urea pump is in blocked state or the triple valve and first spray
The pressure pipe between pressure pipe and the triple valve and the second nozzle between mouth is in blocked state.
Compared to the prior art, what the present invention realized has the beneficial effect that
When the fault detection method is in different conditions by control first jet and second nozzle, urea pump is repeatedly obtained
Pump pressure, can judge whether pressure pipe blocks, realize the detection to pressure pipe stopping state, and detection method letter
It is single efficient.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of double urea nozzle systems provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of the fault detection method of double urea nozzle systems provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the fault detection means of double urea nozzle systems provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
With reference to Fig. 1, Fig. 1 is the structural schematic diagram of double urea nozzle systems provided in an embodiment of the present invention, double urea
Nozzle system includes urea pump 11, triple valve 12, first jet 13 and second nozzle 14.Wherein, the urea pump 11, described
One nozzle 13 and the second nozzle 14 are connect by pressure pipe with the triple valve 12, are that the present invention is implemented with reference to Fig. 2, Fig. 2
The flow diagram of the fault detection method for double urea nozzle systems that example provides, the fault detection method include:
S10 closes the first jet 13 and the second nozzle 14, obtains the target pump pressure of the urea pump 11；
In this step, it is in close state the first jet 13 and the second nozzle 14, i.e., double urea nozzles
System is in off position, and the target pump pressure obtained at this time is the max. pump pressure after stablizing.
S11 opens the first jet 13 and closes the second nozzle 14, obtains the urea pump 11 within a preset time
The first minimum pump pressure；
In this step, institute is judged when the first jet 13 and the second nozzle 14 are in close state first
Whether the pump pressure for stating urea pump 11 is stable in target pump pressure；
If stablizing, locking drives duty ratio when front pump, and opens the first jet 13 and close the second nozzle 14
And start timing, when timing time reaches the preset time, obtain the of the urea pump 11 in the preset time
One minimum pump pressure；
If unstable, the first jet 13 and the second nozzle 14 are continuously in closed state, until the urine
The pump pressure of element pump 11 is stablized to be pumped in the target.
S12 opens the second nozzle 14 and closes the first jet 13, the urea is obtained in the preset time
The minimum pump pressure of the second of pump 11；
Since step S11 is to open the first jet 13 to close the second nozzle 14, when executing step S12, weight
Newly the first jet 13 and the second nozzle 14 are closed, judge whether the pump pressure of the urea pump 11 is stable in the mesh
Mark pump pressure；
If stablizing, locking drives duty ratio when front pump, and opens the second nozzle 14 and close the first jet 13
And start timing, when timing time reaches the preset time, obtain the of the urea pump 11 in the preset time
Two minimum pump pressures；
If unstable, the first jet 13 and the second nozzle 14 are continuously in closed state, until the urine
The pump pressure of element pump 11 is stablized to be pumped in the target.
S13 opens the first jet 13 and the second nozzle 14, the urea pump is obtained in the preset time
11 third minimum pump pressure；
Since step S12 is to open the second nozzle 14 to close the first jet 13, when executing step S13, weight
Newly the first jet 13 and the second nozzle 14 are closed, judge whether the pump pressure of the urea pump 11 is stable in the mesh
Mark pump pressure；
If stablizing, locking drives duty ratio when front pump, and opens the first jet 13 and the second nozzle 14 simultaneously
Start timing, when timing time reaches the preset time, obtains third of the urea pump 11 in the preset time
Minimum pump pressure；
If unstable, the first jet 13 and the second nozzle 14 are continuously in closed state, until the urine
The pump pressure of element pump is stablized to be pumped in the target.
S14, it is minimum according to target pump pressure, the first minimum pump pressure, the second minimum pump pressure and the third
Pump pressure judges whether the pressure pipe blocks.
In this step, when the first minimum pump pressure and the second minimum pump pressure are equal and minimum less than the third
Pump pressure, and the described first minimum pump pressure, the second minimum pump pressure and third minimum pump pressure are respectively less than the target pump pressure
When, the pressure pipe is in unplugged state；
It should be noted that the first minimum pump pressure and the second minimum pump pressure it is equal be it is approximately equal, i.e., both
Between difference meet preset requirement, and the preset requirement can as the case may be depending on, in embodiments of the present invention simultaneously
It is not construed as limiting；
It is pumped when the described second minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described first
When minimum pump pressure is equal to target pump pressure, the pressure pipe between the triple valve 12 and the first jet 13 is in blocking shape
State；
It should be noted that the second minimum pump pressure and third minimum pump pressure it is equal be it is approximately equal, i.e., both
Between difference meet preset requirement, and the preset requirement can as the case may be depending on, in embodiments of the present invention simultaneously
It is not construed as limiting；
It is pumped when the described first minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described second
When minimum pump pressure is equal to target pump pressure, the pressure pipe between the triple valve 12 and the second nozzle 14 is in blocking shape
State；
It should be noted that the first minimum pump pressure and third minimum pump pressure it is equal be it is approximately equal, i.e., both
Between difference meet preset requirement, and the preset requirement can as the case may be depending on, in embodiments of the present invention simultaneously
It is not construed as limiting；
When the described first minimum pump pressure, the second minimum pump pressure, third minimum pump pressure and the target are pumped phase
Whens equal, the pressure pipe between the triple valve 12 and the urea pump 11 is in blocked state or the triple valve 12 and described
The pressure pipe between pressure pipe and the triple valve 12 and the second nozzle 14 between first jet 13 is in blocking shape
State.
It should be noted that the described first minimum pump pressure, the second minimum pump pressure and third minimum pump pressure are equal
To be approximately equal, i.e., any difference between the two meets preset requirement in three, and the preset requirement can be according to specific
Depending on situation, in embodiments of the present invention and it is not construed as limiting；
As can be seen from the above description, which is in different conditions by control first jet and second nozzle
When, the pump pressure of urea pump is repeatedly obtained, can judge whether pressure pipe blocks, realize to pressure pipe stopping state
Detection, and detection method is simple and efficient.
Based on the above embodiment of the present invention, in an alternative embodiment of the invention, the fault detection method further include: open institute
First jet 13 and the second nozzle 14 are stated, the calibration pump pressure of the urea pump 11 is obtained；
It is pumped according to the calibration, target pump pressure, the first minimum pump pressure, second minimum are pumped and described
Third minimum pump pressure judge the pressure pipe whether Partial Blocking.
In this step, if the described first minimum pump pressure is greater than calibration pump pressure but is less than target pump pressure, table
It levies the pressure pipe between the triple valve 12 and the urea pump 11 and is in Partial Blocking state or the triple valve 12 and described
Pressure pipe between first jet 13 is in Partial Blocking state；
Processing is repaired to failure at this time, is continued to test after the completion of processing, if the described first minimum pump pressure is less than described
Target pump pressure, the pressure pipe characterized between the triple valve 12 and the urea pump 11 are in normal condition and the triple valve 12
Pressure pipe between the first jet 13 is in normal condition, if the second minimum pump pressure be greater than the calibration be pumped but
When less than target pump pressure, the pressure pipe characterized between the triple valve 12 and the second nozzle 14 is in Partial Blocking shape
State.
Fault detection method based on a kind of double urea nozzle systems that the above embodiment of the present invention provides, of the invention another
In one embodiment, a kind of fault detection means of double urea nozzle systems is additionally provided, as shown in Figure 1, double urea nozzles
System includes urea pump 11, triple valve 12, first jet 13 and second nozzle 14, wherein the urea pump 11, first spray
Mouth 13 and the second nozzle 14 are connect by pressure pipe with the triple valve 12, are mentioned with reference to Fig. 3, Fig. 3 for the embodiment of the present invention
The structural schematic diagram of the fault detection means of the double urea nozzle systems supplied, the fault detection means include:
First execution module 21 obtains the urea pump for closing the first jet 13 and the second nozzle 14
11 target pump pressure；
Specifically, the first execution module 21 is in close state the first jet 13 and the second nozzle 14, i.e.,
Double urea nozzle systems are in off position, and the target pump pressure obtained at this time is the max. pump pressure after stablizing.
Second execution module 22 is used to open the first jet 13 and closes the second nozzle 14, within a preset time
Obtain the first minimum pump pressure of the urea pump 11；.
Specifically, the second execution module 22 is in close state in the first jet 13 and the second nozzle 14 first
When, judge whether the pump pressure of the urea pump 11 is stable and is pumped in the target；
If stablizing, locking drives duty ratio when front pump, and opens the first jet 13 and close the second nozzle 14
And start timing, when timing time reaches the preset time, obtain the of the urea pump 11 in the preset time
One minimum pump pressure；
If unstable, the first jet 13 and the second nozzle 14 are continuously in closed state, until the urine
The pump pressure of element pump 11 is stablized to be pumped in the target.
Third execution module 23 is used to open the second nozzle 14 and closes the first jet 13, when described default
Interior the second minimum pump pressure for obtaining the urea pump 11；
Specifically, since the second execution module 22 is to open the first jet 13 to close the second nozzle 14, the
When three execution modules 23 work, the first jet 13 and the second nozzle 14 are closed again, judge the urea pump 11
Pump pressure it is whether stable the target be pumped；
If stablizing, locking drives duty ratio when front pump, and opens the second nozzle 14 and close the first jet 13
And start timing, when timing time reaches the preset time, obtain the of the urea pump 11 in the preset time
Two minimum pump pressures；
If unstable, the first jet 13 and the second nozzle 14 are continuously in closed state, until the urine
The pump pressure of element pump 11 is stablized to be pumped in the target.
4th execution module 24 is used to open the first jet 13 and the second nozzle 14, in the preset time
The interior third minimum pump pressure for obtaining the urea pump 11；
Specifically, since third execution module 23 is to open the second nozzle 14 to close the first jet 13, the
When four execution modules 24 work, the first jet 13 and the second nozzle 14 are closed again, judge the urea pump 11
Pump pressure it is whether stable the target be pumped；
If stablizing, locking drives duty ratio when front pump, and opens the first jet 13 and the second nozzle 14 simultaneously
Start timing, when timing time reaches the preset time, obtains third of the urea pump 11 in the preset time
Minimum pump pressure；
If unstable, the first jet 13 and the second nozzle 14 are continuously in closed state, until the urine
The pump pressure of element pump 11 is stablized to be pumped in the target.
Judgment module 25, for according to target pump pressure, the first minimum pump pressure, the second minimum pump pressure and institute
It states third minimum pump pressure and judges whether the pressure pipe blocks.
Specifically, being pumped when the described first minimum pump pressure is equal with the described second minimum pump pressure and is less than the third minimum
It presses, and the described first minimum pump pressure, the second minimum pump pressure and the third minimum are pumped when being respectively less than target pump pressure,
The pressure pipe is in unplugged state；
It is pumped when the described second minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described first
When minimum pump pressure is equal to target pump pressure, the pressure pipe between the triple valve 12 and the first jet 13 is in blocking shape
State；
It is pumped when the described first minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described second
When minimum pump pressure is equal to target pump pressure, the pressure pipe between the triple valve 12 and the second nozzle 14 is in blocking shape
State；
When the described first minimum pump pressure, the second minimum pump pressure, third minimum pump pressure and the target are pumped phase
Whens equal, the pressure pipe between the triple valve 12 and the urea pump 11 is in blocked state or the triple valve 12 and described
The pressure pipe between pressure pipe and the triple valve 12 and the second nozzle 14 between first jet 13 is in blocking shape
State.
As can be seen from the above description, the working principle of the fault detection means is by controlling at first jet and second nozzle
When different conditions, the pump pressure of urea pump is repeatedly obtained, can judge whether pressure pipe blocks, realize to pressure pipe
The detection of stopping state, and operating principle is simple and efficient.
The fault detection method and device of a kind of double urea nozzle systems provided by the present invention have been carried out in detail above
It introduces, used herein a specific example illustrates the principle and implementation of the invention, the explanation of above embodiments
It is merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to this
The thought of invention, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification is not answered
It is interpreted as limitation of the present invention.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For the device disclosed in the embodiment, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, phase
Place is closed referring to method part illustration.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the element that the process, method, article or equipment including a series of elements is intrinsic,
It further include either the element intrinsic for these process, method, article or equipments.In the absence of more restrictions,
The element limited by sentence "including a ...", it is not excluded that in the process, method, article or equipment including the element
In there is also other identical elements.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of fault detection method of double urea nozzle systems, double urea nozzle systems include urea pump, triple valve,
One nozzle and second nozzle, wherein the urea pump, the first jet and the second nozzle pass through pressure pipe and described three
Port valve connection, which is characterized in that the fault detection method includes:
The first jet and the second nozzle are closed, the target pump pressure of the urea pump is obtained；
It opens the first jet and closes the second nozzle, obtain the first minimum pump of the urea pump within a preset time
Pressure；
It opens the second nozzle and closes the first jet, second that the urea pump is obtained in the preset time is minimum
Pump pressure；
The first jet and the second nozzle are opened, the third minimum pump of the urea pump is obtained in the preset time
Pressure；
According to target pump pressure, the first minimum pump pressure, the second minimum pump pressure and third minimum pump pressure judgement
Whether the pressure pipe blocks.
2. fault detection method according to claim 1, which is characterized in that described to open described in the first jet closing
Second nozzle obtains the first minimum pump pressure of the urea pump within a preset time, comprising:
When the first jet and the second nozzle are in close state, judge the pump pressure of the urea pump it is whether stable
The target pump pressure；
If stablizing, open the first jet and close the second nozzle and start timing, when timing time arrival is described pre-
If when the time, obtaining first minimum pump pressure of the urea pump in the preset time.
3. fault detection method according to claim 1, which is characterized in that described to open described in the second nozzle closing
First jet obtains the second minimum pump pressure of the urea pump in the preset time, comprising:
Again the first jet and the second nozzle are closed, judges whether the pump pressure of the urea pump is stable in the mesh
Mark pump pressure；
If stablizing, open the second nozzle and close the first jet and start timing, when timing time arrival is described pre-
If when the time, obtaining second minimum pump pressure of the urea pump in the preset time.
4. fault detection method according to claim 1, which is characterized in that described to open the first jet and described the
Two nozzles obtain the third minimum pump pressure of the urea pump in the preset time, comprising:
Again the first jet and the second nozzle are closed, judges whether the pump pressure of the urea pump is stable in the mesh
Mark pump pressure；
If stablizing, open the first jet and the second nozzle and start timing, when timing time reaches described preset
When the time, third minimum pump pressure of the urea pump in the preset time is obtained.
5. fault detection method according to claim 1, which is characterized in that described according to target pump pressure, described the
One minimum pump pressure, the second minimum pump pressure and third minimum pump pressure judge whether the pressure pipe blocks, comprising:
It is pumped when the described first minimum pump pressure is equal with the described second minimum pump pressure and is less than the third minimum, and described first
When minimum pump pressure, the second minimum pump pressure and third minimum pump pressure are respectively less than target pump pressure, at the pressure pipe
In unplugged state；
It is pumped when the described second minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described first is minimum
When pump pressure is equal to target pump pressure, the pressure pipe between the triple valve and the first jet is in blocked state；
It is pumped when the described first minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described second is minimum
When pump pressure is equal to target pump pressure, the pressure pipe between the triple valve and the second nozzle is in blocked state；
When the described first minimum pump pressure, the second minimum pump pressure, third minimum pump pressure and equal target pump pressure,
Pressure pipe between the triple valve and the urea pump is between blocked state or the triple valve and the first jet
Pressure pipe and the triple valve and the second nozzle between pressure pipe be in blocked state.
6. a kind of fault detection means of double urea nozzle systems, double urea nozzle systems include urea pump, triple valve,
One nozzle and second nozzle, wherein the urea pump, the first jet and the second nozzle pass through pressure pipe and described three
Port valve connection, which is characterized in that the fault detection means includes:
First execution module obtains the target pump pressure of the urea pump for closing the first jet and the second nozzle；
Second execution module is used to open the first jet and closes the second nozzle, obtains the urine within a preset time
The minimum pump pressure of the first of element pump；
Third execution module is used to open the second nozzle and closes the first jet, institute is obtained in the preset time
State the second minimum pump pressure of urea pump；
4th execution module is used to open the first jet and the second nozzle, in the preset time described in acquisition
The third minimum of urea pump is pumped；
Judgment module, for according to target pump pressure, the first minimum pump pressure, the second minimum pump pressure and the third
Minimum pump pressure judges whether the pressure pipe blocks.
7. fault detection means according to claim 6, which is characterized in that the second execution module is used to open described first
Nozzle closes the second nozzle, and the specific method for obtaining the first minimum pump pressure of the urea pump within a preset time includes:
When the first jet and the second nozzle are in close state, judge the pump pressure of the urea pump it is whether stable
The target pump pressure；
If stablizing, open the first jet and close the second nozzle and start timing, when timing time arrival is described pre-
If when the time, obtaining first minimum pump pressure of the urea pump in the preset time.
8. fault detection means according to claim 6, which is characterized in that third execution module is used to open described second
Nozzle closes the first jet, and the specific method packet of the second minimum pump pressure of the urea pump is obtained in the preset time
It includes:
Again the first jet and the second nozzle are closed, judges whether the pump pressure of the urea pump is stable in the mesh
Mark pump pressure；
If stablizing, open the second nozzle and close the first jet and start timing, when timing time arrival is described pre-
If when the time, obtaining second minimum pump pressure of the urea pump in the preset time.
9. fault detection means according to claim 6, which is characterized in that the 4th execution module is used to open described first
Nozzle and the second nozzle obtain the specific method packet of the third minimum pump pressure of the urea pump in the preset time
It includes:
Again the first jet and the second nozzle are closed, judges whether the pump pressure of the urea pump is stable in the mesh
Mark pump pressure；
If stablizing, open the first jet and the second nozzle and start timing, when timing time reaches described preset
When the time, third minimum pump pressure of the urea pump in the preset time is obtained.
10. fault detection means according to claim 6, which is characterized in that the judgment module is used for according to the mesh
Whether mark pump pressure, the first minimum pump pressure, the second minimum pump pressure and third minimum pump pressure judge the pressure pipe
The specific method of blocking includes:
It is pumped when the described first minimum pump pressure is equal with the described second minimum pump pressure and is less than the third minimum, and described first
When minimum pump pressure, the second minimum pump pressure and third minimum pump pressure are respectively less than target pump pressure, at the pressure pipe
In unplugged state；
It is pumped when the described second minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described first is minimum
When pump pressure is equal to target pump pressure, the pressure pipe between the triple valve and the first jet is in blocked state；
It is pumped when the described first minimum pump pressure is equal with third minimum pump pressure and is less than the target, and described second is minimum
When pump pressure is equal to target pump pressure, the pressure pipe between the triple valve and the second nozzle is in blocked state；
When the described first minimum pump pressure, the second minimum pump pressure, third minimum pump pressure and equal target pump pressure,
Pressure pipe between the triple valve and the urea pump is between blocked state or the triple valve and the first jet
Pressure pipe and the triple valve and the second nozzle between pressure pipe be in blocked state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811136734.7A CN109236439B (en) | 2018-09-28 | 2018-09-28 | Fault detection method and device for double-urea nozzle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811136734.7A CN109236439B (en) | 2018-09-28 | 2018-09-28 | Fault detection method and device for double-urea nozzle system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109236439A true CN109236439A (en) | 2019-01-18 |
| CN109236439B CN109236439B (en) | 2020-06-26 |
Family
ID=65057778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811136734.7A Active CN109236439B (en) | 2018-09-28 | 2018-09-28 | Fault detection method and device for double-urea nozzle system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109236439B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111173604A (en) * | 2020-01-19 | 2020-05-19 | 无锡威孚力达催化净化器有限责任公司 | Monitoring method, device and system for urea nozzle |
| CN111878205A (en) * | 2020-08-31 | 2020-11-03 | 上海星融汽车科技有限公司 | Method for identifying leakage of urea pressure pipe of aftertreatment system |
| CN113107654A (en) * | 2021-05-20 | 2021-07-13 | 潍柴动力股份有限公司 | Double-urea injection control system and control method |
| CN113250797A (en) * | 2021-04-29 | 2021-08-13 | 广西玉柴机器股份有限公司 | Method and device for diagnosing urea solution consumption deviation process |
| CN113669145A (en) * | 2021-09-30 | 2021-11-19 | 中国重汽集团济南动力有限公司 | Air-assisted SCR urea dual-injection fault diagnosis system and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050284134A1 (en) * | 2004-06-25 | 2005-12-29 | Eaton Corporation | Multistage reductant injection strategy for slipless, high efficiency selective catalytic reduction |
| CN102052133A (en) * | 2009-11-06 | 2011-05-11 | 博世株式会社 | Reducing agent injection valve abnormality detection device and abnormality detection method |
| CN103527289A (en) * | 2006-06-13 | 2014-01-22 | 沃尔沃拉斯特瓦格纳公司 | Selective catalytic reduction system and method for reducing nitrogen oxide emission of engine |
| US20150096287A1 (en) * | 2013-10-03 | 2015-04-09 | Baohua Qi | Multi-stage SCR Control and Diagnostic System |
| US20170087515A1 (en) * | 2015-09-30 | 2017-03-30 | Deere & Company | System and method for regulating exhaust emissions |
| CN106677862A (en) * | 2016-12-26 | 2017-05-17 | 潍柴动力股份有限公司 | Double-nozzle urea injection amount control method and after-treatment control system |
| JP2018044527A (en) * | 2016-09-16 | 2018-03-22 | 株式会社豊田自動織機 | Exhaust treatment device |
| CN207761768U (en) * | 2017-12-25 | 2018-08-24 | 潍柴动力股份有限公司 | A kind of after-treatment system of engine exhaust |
-
2018
- 2018-09-28 CN CN201811136734.7A patent/CN109236439B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050284134A1 (en) * | 2004-06-25 | 2005-12-29 | Eaton Corporation | Multistage reductant injection strategy for slipless, high efficiency selective catalytic reduction |
| CN103527289A (en) * | 2006-06-13 | 2014-01-22 | 沃尔沃拉斯特瓦格纳公司 | Selective catalytic reduction system and method for reducing nitrogen oxide emission of engine |
| CN102052133A (en) * | 2009-11-06 | 2011-05-11 | 博世株式会社 | Reducing agent injection valve abnormality detection device and abnormality detection method |
| US20150096287A1 (en) * | 2013-10-03 | 2015-04-09 | Baohua Qi | Multi-stage SCR Control and Diagnostic System |
| US20170087515A1 (en) * | 2015-09-30 | 2017-03-30 | Deere & Company | System and method for regulating exhaust emissions |
| JP2018044527A (en) * | 2016-09-16 | 2018-03-22 | 株式会社豊田自動織機 | Exhaust treatment device |
| CN106677862A (en) * | 2016-12-26 | 2017-05-17 | 潍柴动力股份有限公司 | Double-nozzle urea injection amount control method and after-treatment control system |
| CN207761768U (en) * | 2017-12-25 | 2018-08-24 | 潍柴动力股份有限公司 | A kind of after-treatment system of engine exhaust |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111173604A (en) * | 2020-01-19 | 2020-05-19 | 无锡威孚力达催化净化器有限责任公司 | Monitoring method, device and system for urea nozzle |
| CN111173604B (en) * | 2020-01-19 | 2021-11-19 | 无锡威孚力达催化净化器有限责任公司 | Monitoring method, device and system for urea nozzle |
| CN111878205A (en) * | 2020-08-31 | 2020-11-03 | 上海星融汽车科技有限公司 | Method for identifying leakage of urea pressure pipe of aftertreatment system |
| CN113250797A (en) * | 2021-04-29 | 2021-08-13 | 广西玉柴机器股份有限公司 | Method and device for diagnosing urea solution consumption deviation process |
| CN113250797B (en) * | 2021-04-29 | 2022-07-15 | 广西玉柴机器股份有限公司 | Method and device for diagnosing urea solution consumption deviation process |
| CN113107654A (en) * | 2021-05-20 | 2021-07-13 | 潍柴动力股份有限公司 | Double-urea injection control system and control method |
| CN113669145A (en) * | 2021-09-30 | 2021-11-19 | 中国重汽集团济南动力有限公司 | Air-assisted SCR urea dual-injection fault diagnosis system and method |
| CN113669145B (en) * | 2021-09-30 | 2023-01-03 | 中国重汽集团济南动力有限公司 | Air-assisted SCR urea dual-injection fault diagnosis system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109236439B (en) | 2020-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109236439A (en) | A kind of fault detection method and device of double urea nozzle systems | |
| AU2002307910A1 (en) | Real time processing | |
| EP2006547A3 (en) | Method and apparatus for performing diagnostics in a control loop of a control valve | |
| CN103075286A (en) | Method and device for detecting fault of high-pressure oil pump incapable of establishing low rail pressure | |
| CN104122463A (en) | Method and system for detecting electronic expansion valve | |
| CN104697722A (en) | Pipeline air tightness detection device | |
| CN105591536A (en) | Interlaced PFC circuit control method and interlaced PFC circuit control device | |
| CN108344128A (en) | The loading method of multi-online air-conditioning system and its outdoor unit modules, managing device | |
| DE102011119785B3 (en) | Vacuum gripping device and method for operating a vacuum gripper | |
| CN105956108B (en) | A kind of automatic processing method and system of high load | |
| CN206688935U (en) | A kind of spraying equipment | |
| CN205744383U (en) | Gas water automatic conveying system | |
| CN209196395U (en) | A kind of Combined orifice plate valve | |
| WO2017007722A1 (en) | Safety flow obstruction holder | |
| CN113661805B (en) | Control method and device of spray seeding vehicle and spray seeding vehicle | |
| KR100440750B1 (en) | Valve opening and shutting monitering system | |
| JPH0343439Y2 (en) | ||
| CN109556967A (en) | A kind of environment-friendly type monolithic conduit pressure device and hammering method | |
| CN212106901U (en) | Integral type tank deck structure suitable for jar body | |
| CN217511433U (en) | Automatic detection alarm device for blocking of baking oven of boarding machine | |
| CN213092169U (en) | Flow control system | |
| CN220757854U (en) | Liquid fire extinguishing system container valve with pressure reducing function | |
| CN209469547U (en) | Combine pumping system, sundstrand pump system control device, equipment for liquid transportation | |
| CN211716030U (en) | Automatic drainage device | |
| CN213514340U (en) | Operation system of fixed-frequency water pump in central air-conditioning water system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |