CN116857050A - Monitoring method and device for nitrogen oxide conversion efficiency, electronic equipment and medium - Google Patents
Monitoring method and device for nitrogen oxide conversion efficiency, electronic equipment and medium Download PDFInfo
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 281
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000012544 monitoring process Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000002347 injection Methods 0.000 claims abstract description 44
- 239000007924 injection Substances 0.000 claims abstract description 44
- 238000012806 monitoring device Methods 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000004422 calculation algorithm Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 241000699670 Mus sp. Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0412—Methods of control or diagnosing using pre-calibrated maps, tables or charts
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- 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)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The application discloses a monitoring method, a device, electronic equipment and a storage medium for nitrogen oxide conversion efficiency, wherein the method and the device are applied to the electronic equipment of an engine, and particularly judge whether the current working condition of a double-injection SCR system meets the preset monitoring requirement or not; when the conversion efficiency is met, calculating the real-time conversion efficiency of the double-injection SCR system, namely calculating the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box; when the real-time conversion efficiency is lower than the preset minimum conversion efficiency, sending out single efficiency substandard alarm information; and outputting the comprehensive efficiency non-standard alarm information according to the preset standard-reaching efficiency and the second conversion efficiency corresponding to the first conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency. After receiving the corresponding alarm information, the user can take treatment measures in time, so that the excessive emission of the engine can be avoided.
Description
Technical Field
The present application relates to the field of engine technologies, and in particular, to a method, an apparatus, an electronic device, and a medium for monitoring nitrogen oxide conversion efficiency.
Background
The SCR (Selective Catalytic Reduction ) technology is an exhaust gas treatment method for treating nitrogen oxides in engine exhaust gas, that is, ammonia water or urea solution is sprayed into the engine exhaust gas to reduce the nitrogen oxides in the engine exhaust gas into nitrogen and water, thereby reducing pollution to the atmosphere. The dual-injection SCR system comprises two SCR boxes, each SCR box is provided with a nozzle which is configured with independent control, and ammonia water or urea solution is respectively injected into the two SCR boxes, so that higher conversion efficiency of nitrogen oxides is realized.
In order to ensure that the emission of the tail gas of the engine reaches the standard, the conversion efficiency of nitrogen oxides of the double-injection SCR system needs to be monitored so as to give an alarm in time when the conversion requirement cannot be met, so that a user can intervene or treat in time. The existing double-injection SCR system is used for independently monitoring the conversion efficiency of each SCR box, and alarming when the conversion efficiency of any SCR box falls to the corresponding lower limit value. However, the final effect on the environment is actually to see the comprehensive conversion efficiency of the whole double-injection SCR system, and when the conversion efficiency of the two SCR boxes reach the standard, the comprehensive conversion efficiency of the double-injection SCR system does not reach the standard, and at the moment, the system does not give an alarm in time, so that a user can not intervene or treat in time, and the tail gas emission of the engine cannot reach the standard.
Disclosure of Invention
In view of the above, the application provides a method, a device, an electronic device and a medium for monitoring the conversion efficiency of nitrogen oxides of a double-injection SCR system, and the method, the device, the electronic device and the medium are used for timely alarming when the conversion efficiency does not reach the standard so as to avoid the out-of-standard emission of an engine.
In order to achieve the above object, the following solutions have been proposed:
a method for monitoring conversion efficiency of nitrogen oxides, applied to electronic equipment of an engine, for monitoring conversion efficiency of a dual-injection SCR system of the engine, the dual-injection SCR system including a first-stage SCR tank and a second-stage SCR tank, the monitoring method comprising the steps of:
judging whether the current working condition of the double-injection SCR system meets a preset monitoring requirement or not;
when the current working condition meets the preset monitoring requirement, calculating the real-time conversion efficiency of the double-injection SCR system, wherein the real-time conversion efficiency comprises the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box;
when the real-time conversion efficiency is lower than a preset minimum conversion efficiency, sending out single efficiency substandard alarm information;
and outputting the alarm information of the failure of the comprehensive efficiency according to the preset standard-reaching efficiency corresponding to the first conversion efficiency and the second conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency.
Optionally, the determining whether the current working condition of the dual-injection SCR system meets the preset monitoring requirement includes the steps of:
judging whether the current working condition meets the preset working condition or not, if so, judging that the current working condition meets the preset monitoring requirement;
and when a monitoring instruction is received, judging that the current working condition meets the preset monitoring requirement.
Optionally, the preset minimum conversion efficiency includes a first minimum conversion efficiency matched with the first-stage SCR tank and a second minimum conversion efficiency matched with the second-stage SCR tank, and when the real-time conversion efficiency is lower than the preset minimum conversion efficiency, the method sends out individual efficiency failure alarm information, including the steps of:
judging whether the first conversion efficiency is lower than the first lowest conversion efficiency, and sending out first SCR fault information when the first conversion efficiency is lower than the first lowest conversion efficiency;
and judging whether the second conversion efficiency is lower than the second lowest conversion efficiency, and sending out second SCR fault information when the second conversion efficiency is lower than the second lowest conversion efficiency.
Optionally, the step of outputting the alarm information that the comprehensive efficiency does not reach the standard according to the preset standard reaching efficiency corresponding to the first conversion efficiency and the second conversion efficiency includes the following steps:
when the real-time conversion efficiency is higher than the preset minimum conversion efficiency, determining preset standard-reaching efficiency according to the first conversion efficiency;
and when the second conversion efficiency is lower than the preset standard reaching efficiency, sending out the alarm information that the comprehensive efficiency is not standard reaching.
A monitoring device of nitrogen oxide conversion efficiency is applied to the electronic equipment of engine for to the conversion efficiency of the dual injection SCR system of engine is monitored, dual injection SCR system includes first level SCR case and second level SCR case, monitoring device includes:
the working condition judging module is configured to judge whether the current working condition of the double-injection SCR system meets a preset monitoring requirement or not;
the efficiency calculation module is configured to calculate real-time conversion efficiency of the double-injection SCR system when the current working condition meets the preset monitoring requirement, wherein the real-time conversion efficiency comprises first conversion efficiency of the first-stage SCR box and second conversion efficiency of the second-stage SCR box;
the first alarm module is configured to send out single efficiency substandard alarm information when the real-time conversion efficiency is lower than a preset minimum conversion efficiency;
and the second alarm module is configured to output comprehensive efficiency non-standard alarm information according to preset standard-reaching efficiency corresponding to the first conversion efficiency and the second conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency.
Optionally, the working condition judging module includes:
the first judging unit is configured to judge whether the current working condition meets the preset working condition or not, and if yes, the current working condition is judged to meet the preset monitoring requirement;
and the second judging unit is configured to judge that the current working condition meets the preset monitoring requirement when a monitoring instruction is received.
Optionally, the preset minimum conversion efficiency includes a first minimum conversion efficiency matched with the first-stage SCR tank and a second minimum conversion efficiency matched with the second-stage SCR tank, and the first alarm module includes:
a first alarm unit configured to determine whether the first conversion efficiency is lower than the first minimum conversion efficiency, and when the first conversion efficiency is lower than the first minimum conversion efficiency, to issue first SCR fault information;
and the second alarm unit is configured to judge whether the second conversion efficiency is lower than the second lowest conversion efficiency, and send out second SCR fault information when the second conversion efficiency is lower than the second lowest conversion efficiency.
Optionally, the second alarm module includes:
an efficiency determining unit configured to determine a preset achievement efficiency according to the first conversion efficiency when the real-time conversion efficiency is higher than the preset minimum conversion efficiency;
and the comprehensive alarm unit is configured to send out comprehensive efficiency substandard alarm information to calculate the first conversion efficiency according to a preset algorithm when the second conversion efficiency is lower than the preset standard-reaching efficiency, so as to obtain the preset standard-reaching efficiency.
An electronic device for use with an engine, the electronic device comprising at least one processor and a memory coupled to the processor, wherein:
the memory is used for storing a computer program or instructions;
the processor is configured to execute the computer program or instructions to cause the electronic device to implement the method for monitoring nitrogen oxide conversion efficiency as described above.
A storage medium for application to an electronic device, the storage medium carrying one or more computer programs executable by the electronic device to cause the electronic device to implement a method of monitoring nitrogen oxide conversion efficiency as described above.
From the above technical scheme, the application discloses a method, a device, an electronic device and a storage medium for monitoring the conversion efficiency of nitrogen oxides, wherein the method and the device are applied to the electronic device of an engine, and particularly judge whether the current working condition of a double-injection SCR system meets the preset monitoring requirement; when the conversion efficiency is met, calculating the real-time conversion efficiency of the double-injection SCR system, namely calculating the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box; when the real-time conversion efficiency is lower than the preset minimum conversion efficiency, sending out single efficiency substandard alarm information; and outputting the comprehensive efficiency non-standard alarm information according to the preset standard-reaching efficiency and the second conversion efficiency corresponding to the first conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency. After receiving the corresponding alarm information, the user can take treatment measures in time, so that the excessive emission of the engine can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for monitoring NOx conversion efficiency according to an embodiment of the present application;
FIG. 2 is a block diagram of a monitoring device for NOx conversion efficiency according to an embodiment of the present application;
FIG. 3 is a block diagram of a monitoring device for NOx conversion efficiency according to an embodiment of the present application;
fig. 4 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
Fig. 1 is a flowchart of a method for monitoring nox conversion efficiency according to an embodiment of the present application.
As shown in fig. 1, the monitoring method provided in this embodiment is applied to an electronic device of an engine, which is used to monitor the conversion efficiency of a dual injection SRC system of the engine and alarm in time in a fault state, and the electronic device can be understood as a controller of the engine, such as an ECU or an MCU. The dual injection SCR system in this embodiment includes a first stage SCR tank and a second stage SCR tank connected in series. The monitoring method specifically comprises the following steps:
s1, judging whether the current working condition of the double-injection SCR system meets the preset monitoring requirement.
Because the flow and the temperature of the SCR system of any engine are not necessarily in a normal state in a period of time when the SCR system starts to work, each stage of SCR in the system works independently. And only when the two-stage SCR works in a cooperative working mode, namely, the two-stage SCR works cooperatively under the condition of distinguishing the main engine from the auxiliary engine, the conversion efficiency of the nitrogen oxides is required to be monitored. Therefore, the current working condition needs to be judged by the following means:
judging various specific parameters of the current working condition, determining whether the two-stage SCR boxes are in cooperative work, and if so, judging that the current working condition meets the preset monitoring requirement;
in another way, whether a corresponding control instruction is received or not is judged, namely, if a monitoring instruction is received, the current working condition is also considered to meet the preset monitoring requirement in order to meet the requirements of a user or an engine at the moment.
S2, calculating the real-time conversion efficiency of the double-injection SCR system.
When the current working condition meets the preset monitoring requirement, various parameters are acquired from the engine, the real-time conversion efficiency of the double-injection SCR system is calculated based on a preset algorithm, and the real-time conversion efficiency is obtained by carrying out integral operation based on an enabling request and according to a certain boundary condition in the specific calculation process. In view of the system comprising a two-stage SCR system, the implemented conversion efficiency comprises a first conversion efficiency corresponding to a first stage SCR tank and a second conversion efficiency corresponding to a second stage SCR tank.
S3, when the real-time conversion efficiency does not reach the standard, sending out single efficiency alarm information.
When the first conversion efficiency or the second conversion efficiency in the real-time conversion efficiency is lower than the corresponding preset minimum conversion efficiency, the single efficiency substandard alarm information is sent out, and the conversion efficiency of the first-stage SCR box or the second-stage SCR box is proved to be substandard at the moment, or the conversion efficiency of the two-stage SCR is not up to the standard. The preset minimum conversion efficiency includes a first minimum conversion rate corresponding to the first stage SCR tank shown in table 1a, and a second minimum conversion rate corresponding to the second stage SCR tank shown in table 2a, including conversion efficiency corresponding to the flow rate and temperature of exhaust gas in the corresponding SCR, in percentage.
TABLE 1a
TABLE 2a
The individual efficiency substandard alarm information includes first SCR fault information reflecting substandard conversion efficiency of the first stage SCR tank, and also includes second SCR fault information reflecting substandard conversion efficiency of the second stage SCR tank. The specific means of the step are as follows:
firstly, judging whether the first conversion efficiency is lower than the first minimum conversion efficiency, and when the first conversion efficiency is lower than the first minimum conversion efficiency, sending out first SCR fault information for indicating that the conversion efficiency of the first-stage SCR box does not reach the standard.
And then or simultaneously judging whether the second conversion efficiency is lower than the second lowest conversion efficiency, and when the second conversion efficiency is lower than the second lowest conversion efficiency, sending out second SCR fault information for indicating that the conversion efficiency of the second-stage SCR box does not reach the standard.
And S4, outputting alarm information of the substandard comprehensive efficiency when the comprehensive conversion efficiency is substandard.
That is, when the conversion efficiencies of the two-stage SCR are both higher than the corresponding lowest conversion efficiency, the integrated conversion efficiency is calculated based on the first conversion efficiency and the second conversion efficiency so as to determine whether the integrated conversion efficiency meets the standard. Specifically, the method is realized by the following steps:
firstly, determining a corresponding preset standard-reaching efficiency according to the first conversion efficiency, wherein the preset standard-reaching efficiency is used for checking the second conversion efficiency of the second-stage SCR box. A plurality of MAP tables may be preset, including table 1b, table 1c, and table 1d:
TABLE 1b
TABLE 1c
TABLE 1d
Determining which MAP table the first conversion efficiency is in, e.g. 0.45 in case of an exhaust gas flow of 500kg/h at 200 ℃, determining that the first conversion efficiency is in table 1c, referring now to table 2c of the following tables according to table 1c, tables 2b, 2c and 2d are MAP tables containing preset achievement efficiencies, respectively as follows:
TABLE 2b
TABLE 2c
TABLE 2d
As can be seen from table 2c, the preset achievement efficiency should be 0.75%, i.e. 75%.
Then, whether the second conversion efficiency is lower than the preset standard-reaching efficiency is judged, if the second conversion efficiency is lower than the preset standard-reaching efficiency, the condition that the comprehensive conversion efficiency of the nitrogen oxides of the system does not reach the standard at the moment is judged, and at the moment, the comprehensive efficiency is sent out to be not reach the standard is judged.
From the above technical solution, it can be seen that this embodiment provides a method for monitoring conversion efficiency of nitrogen oxides, where the method is applied to an electronic device of an engine, specifically, determining whether a current working condition of a dual-injection SCR system meets a preset monitoring requirement; when the conversion efficiency is met, calculating the real-time conversion efficiency of the double-injection SCR system, namely calculating the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box; when the real-time conversion efficiency is lower than the preset minimum conversion efficiency, sending out single efficiency substandard alarm information; and outputting the comprehensive efficiency non-standard alarm information according to the preset standard-reaching efficiency and the second conversion efficiency corresponding to the first conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency. After receiving the corresponding alarm information, the user can take treatment measures in time, so that the excessive emission of the engine can be avoided.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
Computer program code for carrying out operations of the present disclosure may be written in one or more programming languages, including, but not limited to, an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the C-language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of remote computers, the remote computer may be connected to the user computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer.
Example two
Fig. 2 is a block diagram of a monitoring device for nox conversion efficiency according to an embodiment of the present application.
As shown in fig. 2, the monitoring device provided in this embodiment is applied to an electronic device of an engine, which is used to monitor the conversion efficiency of a dual-injection SRC system of the engine and alarm in time in a fault state, and the electronic device can be understood as a controller of the engine, such as an ECU or an MCU. The dual injection SCR system in this embodiment includes a first stage SCR tank and a second stage SCR tank connected in series. The monitoring device specifically comprises a working condition judging module 10, an efficiency calculating module 20, a first alarm module 30 and a second alarm module.
The working condition judging module is used for judging whether the current working condition of the double-injection SCR system meets the preset monitoring requirement.
Because the flow and the temperature of the SCR system of any engine are not necessarily in a normal state in a period of time when the SCR system starts to work, each stage of SCR in the system works independently. And only when the two-stage SCR works in a cooperative working mode, namely, the two-stage SCR works cooperatively under the condition of distinguishing the main engine from the auxiliary engine, the conversion efficiency of the nitrogen oxides is required to be monitored. For this reason, the current working condition needs to be judged, and the module includes a first judging unit and a second judging unit.
The first judging unit is used for judging various specific parameters of the current working condition and determining whether the two-stage SCR is in cooperative work or not, if so, the current working condition is judged to meet the preset monitoring requirement;
the second judging unit is used for judging whether a corresponding control instruction is received or not, namely, if the corresponding control instruction is received, the current working condition is also considered to meet the preset monitoring requirement in order to meet the requirements of users or engines at the moment.
The efficiency calculation module is used for calculating the real-time conversion efficiency of the double-injection SCR system.
When the current working condition meets the preset monitoring requirement, various parameters are acquired from the engine, the real-time conversion efficiency of the double-injection SCR system is calculated based on a preset algorithm, and the real-time conversion efficiency is obtained by carrying out integral operation based on an enabling request and according to a certain boundary condition in the specific calculation process. In view of the system comprising a two-stage SCR system, the implemented conversion efficiency comprises a first conversion efficiency corresponding to a first stage SCR tank and a second conversion efficiency corresponding to a second stage SCR tank.
The first alarm module is used for sending out single efficiency substandard alarm information when the real-time conversion efficiency is substandard.
When the first conversion efficiency or the second conversion efficiency in the real-time conversion efficiency is lower than the corresponding preset minimum conversion efficiency, the single efficiency substandard alarm information is sent out, and the conversion efficiency of the first-stage SCR box or the second-stage SCR box is proved to be substandard at the moment, or the conversion efficiency of the two-stage SCR is not up to the standard. The preset minimum conversion efficiency includes a first minimum conversion rate corresponding to the first stage SCR tank shown in table 1a, and a second minimum conversion rate corresponding to the second stage SCR tank shown in table 2a, including conversion efficiency corresponding to the flow rate and temperature of exhaust gas in the corresponding SCR, in percentage.
The individual efficiency substandard alarm information includes first SCR fault information reflecting substandard conversion efficiency of the first stage SCR tank, and also includes second SCR fault information reflecting substandard conversion efficiency of the second stage SCR tank. The module comprises a first alarm unit 31 and a second alarm unit 32, as shown in fig. 3.
The first alarm unit is used for judging whether the first conversion efficiency is lower than the first minimum conversion efficiency, and when the first conversion efficiency is lower than the first minimum conversion efficiency, the first alarm unit sends out first SCR fault information for indicating that the conversion efficiency of the first-stage SCR box does not reach the standard.
The second alarm unit is used for judging whether the second conversion efficiency is lower than the second minimum conversion efficiency, and sending out second SCR fault information for indicating that the conversion efficiency of the second-stage SCR box does not reach the standard when the second conversion efficiency is lower than the second minimum conversion efficiency.
And the second alarm module is used for outputting alarm information of the substandard comprehensive efficiency when the comprehensive conversion efficiency is substandard.
That is, when the conversion efficiencies of the two-stage SCR are both higher than the corresponding lowest conversion efficiency, the integrated conversion efficiency is calculated based on the first conversion efficiency and the second conversion efficiency so as to determine whether the integrated conversion efficiency meets the standard. The module comprises an efficiency determination unit 41 and an integrated alarm unit 42.
The efficiency determining unit is used for determining a corresponding preset standard-reaching efficiency according to the first conversion efficiency, and the preset standard-reaching efficiency is used for checking the second conversion efficiency of the second-stage SCR box.
The comprehensive alarm unit is used for judging whether the second conversion efficiency is lower than the preset standard-reaching efficiency, if so, the comprehensive conversion efficiency of the nitrogen oxides of the system is judged to be not standard-reaching, and at the moment, the comprehensive efficiency is sent out to be not standard-reaching alarm information.
From the above technical solution, it can be seen that this embodiment provides a monitoring device for nitrogen oxide conversion efficiency, where the device is applied to an electronic device of an engine, specifically, determines whether a current working condition of a dual-injection SCR system meets a preset monitoring requirement; when the conversion efficiency is met, calculating the real-time conversion efficiency of the double-injection SCR system, namely calculating the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box; when the real-time conversion efficiency is lower than the preset minimum conversion efficiency, sending out single efficiency substandard alarm information; and outputting the comprehensive efficiency non-standard alarm information according to the preset standard-reaching efficiency and the second conversion efficiency corresponding to the first conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency. After receiving the corresponding alarm information, the user can take treatment measures in time, so that the excessive emission of the engine can be avoided.
The units involved in the embodiments of the present disclosure may be implemented by means of software, or may be implemented by means of hardware. The name of the unit does not in any way constitute a limitation of the unit itself, for example the first acquisition unit may also be described as "unit acquiring at least two internet protocol addresses".
The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an Application Specific Standard Product (ASSP), a system on a chip (SOC), a Complex Programmable Logic Device (CPLD), and the like.
Example III
Fig. 4 is a block diagram of an electronic device according to an embodiment of the present application.
Referring to fig. 4, a schematic diagram of a configuration of an electronic device suitable for use in implementing embodiments of the present disclosure is shown. The terminal devices in the embodiments of the present disclosure may include, but are not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and stationary terminals such as digital TVs, desktop computers, and the like. The electronic device is merely an example and should not impose any limitations on the functionality and scope of use of embodiments of the present disclosure.
The electronic device may include a processing means (e.g., a central processor, a graphics processor, etc.) 401, which may perform various appropriate actions and processes according to programs stored in a read-only memory ROM404 or loaded from an input means 406 into a random access memory RAM 403. In the RAM, various programs and data required for the operation of the electronic device are also stored. The processing device, ROM, and RAM are connected to each other by bus 404. An input/output (I/O) interface 405 is also connected to bus 404.
In general, the following devices may be connected to the I/O interface: input devices including, for example, touch screens, touch pads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; an output device 407 including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; storage 408 including, for example, magnetic tape, hard disk, etc.; and a communication device 409. The communication means 409 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. While an electronic device having various means is shown in the figures, it is to be understood that not all of the illustrated means are required to be implemented or provided. More or fewer devices may be implemented or provided instead.
Example IV
The embodiment provides a computer readable storage medium, wherein the computer readable storage medium carries one or more computer programs, and when the one or more computer programs are executed by the electronic equipment, the electronic equipment judges whether the current working condition of the dual-injection SCR system meets the preset monitoring requirement; when the conversion efficiency is met, calculating the real-time conversion efficiency of the double-injection SCR system, namely calculating the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box; when the real-time conversion efficiency is lower than the preset minimum conversion efficiency, sending out single efficiency substandard alarm information; and outputting the comprehensive efficiency non-standard alarm information according to the preset standard-reaching efficiency and the second conversion efficiency corresponding to the first conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency. After receiving the corresponding alarm information, the user can take treatment measures in time, so that the excessive emission of the engine can be avoided.
It should be noted that the computer readable medium described in the present disclosure may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this disclosure, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present disclosure, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, fiber optic cables, RF (radio frequency), and the like, or any suitable combination of the foregoing.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the application.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.
The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present principles and embodiments may be better understood; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (10)
1. A method for monitoring conversion efficiency of nitrogen oxides, applied to electronic equipment of an engine, for monitoring conversion efficiency of a dual-injection SCR system of the engine, the dual-injection SCR system comprising a first-stage SCR tank and a second-stage SCR tank, the method comprising the steps of:
judging whether the current working condition of the double-injection SCR system meets a preset monitoring requirement or not;
when the current working condition meets the preset monitoring requirement, calculating the real-time conversion efficiency of the double-injection SCR system, wherein the real-time conversion efficiency comprises the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box;
when the real-time conversion efficiency is lower than a preset minimum conversion efficiency, sending out single efficiency substandard alarm information;
and outputting the alarm information of the failure of the comprehensive efficiency according to the preset standard-reaching efficiency corresponding to the first conversion efficiency and the second conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency.
2. The method for monitoring as claimed in claim 1, wherein said determining whether the current operating condition of the dual injection SCR system meets a preset monitoring requirement comprises the steps of:
judging whether the current working condition meets the preset working condition or not, if so, judging that the current working condition meets the preset monitoring requirement;
and when a monitoring instruction is received, judging that the current working condition meets the preset monitoring requirement.
3. The monitoring method of claim 1, wherein the preset minimum conversion efficiency includes a first minimum conversion efficiency matched to the first stage SCR tank and a second minimum conversion efficiency matched to the second stage SCR tank, and the issuing of the individual efficiency failure alarm message when the real-time conversion efficiency is lower than the preset minimum conversion efficiency includes the steps of:
judging whether the first conversion efficiency is lower than the first lowest conversion efficiency, and sending out first SCR fault information when the first conversion efficiency is lower than the first lowest conversion efficiency;
and judging whether the second conversion efficiency is lower than the second lowest conversion efficiency, and sending out second SCR fault information when the second conversion efficiency is lower than the second lowest conversion efficiency.
4. The monitoring method according to claim 1, wherein the outputting of the integrated efficiency non-compliance alarm information according to the preset compliance efficiency corresponding to the first conversion efficiency and the second conversion efficiency includes the steps of:
when the real-time conversion efficiency is higher than the preset minimum conversion efficiency, determining preset standard-reaching efficiency according to the first conversion efficiency;
and when the second conversion efficiency is lower than the preset standard reaching efficiency, sending out the alarm information that the comprehensive efficiency is not standard reaching.
5. A monitoring device of nitrogen oxide conversion efficiency is applied to the electronic equipment of engine for to the conversion efficiency of the two injection SCR system of engine is monitored, two injection SCR system includes first level SCR case and second level SCR case, its characterized in that, monitoring device includes:
the working condition judging module is configured to judge whether the current working condition of the double-injection SCR system meets a preset monitoring requirement or not;
the efficiency calculation module is configured to calculate real-time conversion efficiency of the double-injection SCR system when the current working condition meets the preset monitoring requirement, wherein the real-time conversion efficiency comprises first conversion efficiency of the first-stage SCR box and second conversion efficiency of the second-stage SCR box;
the first alarm module is configured to send out single efficiency substandard alarm information when the real-time conversion efficiency is lower than a preset minimum conversion efficiency;
and the second alarm module is configured to output comprehensive efficiency non-standard alarm information according to preset standard-reaching efficiency corresponding to the first conversion efficiency and the second conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency.
6. The monitoring device of claim 5, wherein the condition determination module comprises:
the first judging unit is configured to judge whether the current working condition meets the preset working condition or not, and if yes, the current working condition is judged to meet the preset monitoring requirement;
and the second judging unit is configured to judge that the current working condition meets the preset monitoring requirement when a monitoring instruction is received.
7. The monitoring device of claim 5, wherein the preset minimum conversion efficiency comprises a first minimum conversion efficiency that matches the first stage SCR tank and a second minimum conversion efficiency that matches the second stage SCR tank, the first alarm module comprising:
a first alarm unit configured to determine whether the first conversion efficiency is lower than the first minimum conversion efficiency, and when the first conversion efficiency is lower than the first minimum conversion efficiency, to issue first SCR fault information;
and the second alarm unit is configured to judge whether the second conversion efficiency is lower than the second lowest conversion efficiency, and send out second SCR fault information when the second conversion efficiency is lower than the second lowest conversion efficiency.
8. The monitoring device of claim 5, wherein the second alarm module comprises:
an efficiency determining unit configured to determine a preset achievement efficiency according to the first conversion efficiency when the real-time conversion efficiency is higher than the preset minimum conversion efficiency;
and the comprehensive alarm unit is configured to send out comprehensive efficiency substandard alarm information to calculate the first conversion efficiency according to a preset algorithm when the second conversion efficiency is lower than the preset standard-reaching efficiency, so as to obtain the preset standard-reaching efficiency.
9. An electronic device for use with an engine, the electronic device comprising at least one processor and a memory coupled to the processor, wherein:
the memory is used for storing a computer program or instructions;
the processor is configured to execute the computer program or instructions to cause the electronic device to implement the monitoring method of nitrogen oxide conversion efficiency according to any one of claims 1 to 4.
10. A storage medium for application to an electronic device, characterized in that the storage medium carries one or more computer programs that are executable by the electronic device to cause the electronic device to implement the method of monitoring nitrogen oxide conversion efficiency according to any one of claims 1-4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311055625.3A CN116857050A (en) | 2023-08-21 | 2023-08-21 | Monitoring method and device for nitrogen oxide conversion efficiency, electronic equipment and medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311055625.3A CN116857050A (en) | 2023-08-21 | 2023-08-21 | Monitoring method and device for nitrogen oxide conversion efficiency, electronic equipment and medium |
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