CN116838461B - Correction method and device for ammonia storage set value, electronic equipment and storage medium - Google Patents
Correction method and device for ammonia storage set value, electronic equipment and storage medium Download PDFInfo
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- CN116838461B CN116838461B CN202311111642.4A CN202311111642A CN116838461B CN 116838461 B CN116838461 B CN 116838461B CN 202311111642 A CN202311111642 A CN 202311111642A CN 116838461 B CN116838461 B CN 116838461B
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 630
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 316
- 238000012937 correction Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 41
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 231
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims abstract description 26
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004202 carbamide Substances 0.000 claims abstract description 13
- 230000035945 sensitivity Effects 0.000 claims description 14
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000010531 catalytic reduction reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 6
- 238000012549 training Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000013528 artificial neural network Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 241000699670 Mus sp. Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 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
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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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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)
- Exhaust Gas After Treatment (AREA)
Abstract
The application discloses a correction method, a correction device, an electronic device and a storage medium of an ammonia storage set value, wherein the method and the correction device are applied to the electronic device, and particularly calculate the gas component and the exhaust gas flow of an inlet of a ccSCR (selective catalytic reduction) based on a ccSCR physical model to obtain a theoretical ammonia storage value of the ccSCR, and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration at the downstream of the theoretical ammonia storage value; correcting the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration; correcting the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR to obtain corrected actual measured ammonia concentration; and correcting the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value, so that the double-SCR injection system can execute urea injection according to the corrected ammonia storage set value, and standard emission of the diesel engine is ensured.
Description
Technical Field
The present application relates to the technical field of engines, and more particularly, to a method and apparatus for correcting an ammonia storage setting value, an electronic device, and a storage medium.
Background
The ccSCR of the prior double-SCR injection system has the risks of hydrothermal aging and sulfur poisoning because of being close to a high-temperature area after vortex, so that the conversion efficiency of the ccSCR to nitrogen oxides is reduced, the actual ammonia storage capacity is reduced, and at the moment, the ccSCR still performs ammonia storage closed-loop injection according to a pre-calibrated ammonia storage set value, so that ammonia leakage occurs at the downstream of the ccSCR, and the emission of an engine cannot reach the standard.
Disclosure of Invention
In view of the above, the present application provides a method, an apparatus, an electronic device, and a storage medium for correcting an ammonia storage set value, which are used for obtaining a real ammonia storage value by correcting a pre-calibrated ammonia storage value, so as to avoid an engine from failing to reach the emission standard due to ammonia leakage caused by ccSCR.
In order to achieve the above object, the following solutions have been proposed:
a correction method of an ammonia storage set point applied to an electronic device of a diesel engine provided with a dual SCR injection system including ccSCR, the correction method comprising the steps of:
calculating the gas component and the exhaust gas flow of an inlet of the ccSCR based on a ccSCR physical model to obtain a theoretical ammonia storage value of the ccSCR and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration at the downstream of the theoretical ammonia storage value;
correcting the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration;
correcting the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR to obtain corrected actual ammonia concentration;
and correcting the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value, so that the double-SCR injection system can execute urea injection according to the corrected ammonia storage set value.
Optionally, the correcting the theoretical ammonia concentration to obtain a corrected theoretical ammonia concentration includes the steps of:
acquiring the working temperature of the ccSCR;
searching a temperature correction parameter from a sensitive temperature curve according to the working temperature;
and correcting the theoretical ammonia concentration according to the temperature correction parameter to obtain the corrected theoretical ammonia concentration.
Optionally, the correcting the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR to obtain a corrected actual ammonia concentration includes the steps of:
acquiring the concentration of nitrogen oxides upstream of the ccSCR;
subtracting the theoretical nitrogen oxide concentration from the nitrogen oxide concentration to obtain an actual measurement ammonia concentration;
searching from a sensor correction curve based on the current working parameters of the diesel engine to obtain a sensor sensitivity correction coefficient;
and correcting the actual measured ammonia concentration based on the sensor sensitivity correction coefficient to obtain corrected actual measured ammonia concentration.
Optionally, the correcting the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value, including the steps of:
and subtracting the corrected theoretical ammonia concentration from the corrected actual ammonia concentration to obtain an ammonia concentration difference.
Searching an ammonia storage deviation value corresponding to the ammonia concentration difference according to the normalized value of the ammonia concentration difference;
adding the ammonia storage offset value to the theoretical ammonia storage value to obtain an actual ammonia storage value;
and correcting the ammonia storage set value according to the actual ammonia storage value to obtain the corrected ammonia storage set value.
A correction device of an ammonia storage set point applied to an electronic device of a diesel engine provided with a dual SCR injection system including ccSCR, the correction device comprising:
the concentration calculation module is configured to calculate the gas component and the exhaust gas flow of the inlet of the ccSCR based on a ccSCR physical model to obtain a theoretical ammonia storage value of the ccSCR and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration at the downstream of the theoretical ammonia storage value;
the first correction module is configured to carry out correction processing on the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration;
the second correction module is configured to perform correction processing on the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR so as to obtain corrected actual ammonia concentration;
and the correction output module is configured to correct the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value so that the double-SCR injection system can execute urea injection according to the corrected ammonia storage set value.
Optionally, the first correction module includes:
a temperature acquisition unit configured to acquire an operating temperature of the ccSCR;
the first table look-up unit is configured to look up a temperature correction parameter from a sensitive temperature curve according to the working temperature;
and the first correction unit is configured to correct the theoretical ammonia concentration according to the temperature correction parameter to obtain the corrected theoretical ammonia concentration.
Optionally, the second correction module includes:
a concentration acquisition unit configured to acquire a nitrogen oxide concentration upstream of the ccSCR;
a first differencing unit configured to subtract the theoretical nitrogen oxide concentration from the nitrogen oxide concentration to obtain an measured ammonia concentration;
the second table look-up unit is configured to search from the sensor correction curve based on the current working parameters of the diesel engine to obtain a sensor sensitivity correction coefficient;
and a second correction unit configured to perform correction processing on the measured ammonia concentration based on the sensor sensitivity correction coefficient, to obtain a corrected measured ammonia concentration.
Optionally, the correction output module includes:
and a second difference unit configured to subtract the corrected theoretical ammonia concentration from the corrected measured ammonia concentration to obtain an ammonia concentration difference.
A third lookup unit configured to lookup an ammonia storage bias value corresponding to the ammonia concentration difference according to the normalized value of the ammonia concentration difference;
an addition calculation unit configured to add the ammonia storage bias value to the theoretical ammonia storage value to obtain an actual ammonia storage value;
and a third correction unit configured to correct the ammonia storage setting value according to the actual ammonia storage value to obtain the corrected ammonia storage setting value.
An electronic device for application to a diesel engine provided with a dual SCR injection system comprising a ccSCR, the electronic device comprising at least one processor and a memory connected to the processor, wherein:
the memory is used for storing a computer program or instructions;
the processor is configured to process the computer program or instructions to cause the electronic device to implement a method of correcting the ammonia storage setting 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 enable the electronic device to implement a method of correcting an ammonia storage setting as described above.
As can be seen from the above technical solution, the present application discloses a method, a device, an electronic device and a storage medium for correcting an ammonia storage set value, where the method and the device are applied to the electronic device, specifically, based on a ccSCR physical model, calculating a gas component and an exhaust gas flow of an inlet of the ccSCR to obtain a theoretical ammonia storage value of the ccSCR, and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration downstream thereof; correcting the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration; correcting the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR to obtain corrected actual measured ammonia concentration; and correcting the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value, so that the double-SCR injection system can execute urea injection according to the corrected ammonia storage set value, and standard emission of the diesel engine is ensured.
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 schematic diagram of a dual SCR injection system of a diesel engine;
FIG. 2 is a flow chart of a method for correcting an ammonia storage setting in accordance with an embodiment of the present application;
FIG. 3 is a flow chart of a method for calculating correction of theoretical ammonia concentration in accordance with an embodiment of the present application;
FIG. 4 is a flowchart of a method for calculating correction of measured ammonia concentration according to an embodiment of the present application;
FIG. 5 is a flowchart of a method for calculating correction of ammonia storage setting according to an embodiment of the present application;
FIG. 6 is a block diagram of an ammonia storage setting correction device according to an embodiment of the present application;
fig. 7 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.
The existing dual SCR injection system is provided with a plurality of nitrogen oxide sensors, which are respectively arranged before the immediately coupled selective catalytic reducer ccSCR, before the oxidation catalyst DOC, and after the selective catalytic reducer SCR/ammonia oxidation catalyst ASC, as shown in fig. 1. In which a nitrogen oxide sensor 101, a urea nozzle 102 and a temperature sensor 103 are arranged.
It can be seen that the ccSCR is close to the high temperature area after vortex, so that the risk of hydrothermal aging and sulfur poisoning exists, the conversion efficiency of nitrogen oxides is reduced, the actual ammonia storage capacity is reduced, at the moment, the ccSCR still performs ammonia storage closed-loop injection according to the ammonia storage set value calibrated in advance, the actually required urea injection amount cannot be met, ammonia leakage occurs at the downstream of the ccSCR, and the emission of an engine cannot reach the standard.
Therefore, the application adopts the following scheme to correct the ammonia storage set value in the double SCR injection system so as to ensure that the double SCR injection system can avoid ammonia leakage. The scheme in the application is applied to an electronic system arranged on a diesel engine, and the electronic system can be understood as an ECU or an MCU with information processing capability and data calculation capability. The engine is provided with the above described dual SCR injection system and the solution of the application will now be described in detail by means of the following examples.
FIG. 2 is a flow chart of a method for correcting an ammonia storage setting in accordance with an embodiment of the present application.
As shown in fig. 2, the method for correcting the ammonia storage setting value provided in this embodiment includes the following steps:
s1, calculating a theoretical ammonia storage value, a theoretical nitrogen oxide concentration and a theoretical ammonia concentration.
Specifically, the gas composition and the exhaust gas flow of the inlet of the ccSCR are calculated based on a ccSCR physical model, so that a theoretical ammonia storage value of the ccSCR, and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration downstream of the ccSCR are obtained. The ccSCR physical model is a calculation tool obtained by training a neural network based on a training sample, wherein the training sample is obtained by actually measuring various parameters of the entity ccSCR in the working process to obtain parameter values, the parameter values comprise input parameters and output parameters, the input parameters comprise but are not limited to gas components and exhaust gas flow, and the output parameters comprise but are not limited to theoretical nitrogen oxide concentration, theoretical ammonia storage value and theoretical ammonia concentration.
S2, correcting the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration.
After the theoretical ammonia concentration is obtained, the theoretical ammonia concentration is corrected based on a preset step, so that the corrected theoretical ammonia concentration is obtained, and the method specifically comprises the following steps of, as shown in fig. 3:
s201, acquiring the working temperature of ccSCR.
In view of the fact that the dual SCR is provided with a corresponding temperature sensor, the temperature detected by the temperature sensor provided at the ccSCR can be acquired via the data bus, thereby acquiring the operating temperature of the ccSCR.
S202, searching a temperature correction coefficient from a sensitive temperature curve according to the working temperature.
On the basis of obtaining the working temperature of the ccSCR, searching from a preset sensitive temperature curve based on the temperature curve to obtain a temperature correction parameter corresponding to the working temperature.
S203, correcting the theoretical ammonia concentration according to the temperature correction parameters.
Specifically, the temperature correction parameter is multiplied by the theoretical ammonia concentration to obtain the corrected theoretical ammonia concentration.
S3, correcting the theoretical nitrogen oxide concentration according to the upstream nitrogen oxide concentration.
That is, the theoretical nitrogen oxide concentration is corrected by the nitrogen oxide concentration upstream of ccSCR, and the corrected measured ammonia concentration is finally obtained. The specific steps are as follows, as shown in fig. 4.
And S301, acquiring the concentration of nitrogen oxides at the upstream of ccSCR.
That is, the obtained nitrogen oxide concentration value is collected from a nitrogen oxide sensor disposed upstream of the ccSCR, and the nitrogen oxide concentration upstream of the ccSCR is obtained.
S302, subtracting the theoretical nitrogen oxide concentration from the upstream nitrogen oxide concentration.
The theoretical nitrogen oxide concentration calculated by the ccSCR physical model is subtracted from the nitrogen oxide concentration value at the upstream of the ccSCR, and is taken as the actual measurement ammonia concentration, namely the corresponding nitrogen oxide sensor is taken as a virtual ammonia sensor.
S303, searching a sensor sensitivity correction coefficient based on the current working parameters.
The sensor sensitivity correction coefficient corresponding to the working parameter is obtained by searching from the sensor correction curve based on the current working parameter of the diesel engine. The sensor correction curve is obtained by bench test of the diesel engine through the transferred ammonia test equipment, so as to obtain a correction coefficient corresponding to the corresponding working parameter of the diesel engine. The operating parameter here is temperature or air-fuel ratio.
S304, correcting the actually measured ammonia concentration based on the sensor sensitivity correction coefficient.
The correction coefficient is multiplied by the measured ammonia concentration obtained above, thereby obtaining a corrected measured ammonia concentration.
S4, correcting the ammonia storage set value of the ccSCR to obtain a corrected ammonia storage set value.
And correcting the ammonia storage set value of the ccSCR on the basis of the corrected theoretical nitrogen oxide concentration, the corrected theoretical ammonia concentration and the corrected actual ammonia concentration to obtain a corrected ammonia storage set value. The specific correction procedure is as follows, as shown in fig. 5.
S401, subtracting the corrected theoretical ammonia concentration from the corrected actual concentration.
By subtracting the two, a difference in ammonia concentration is obtained.
S402, searching an ammonia storage deviation value corresponding to the ammonia concentration difference according to the normalized value of the ammonia concentration difference.
After the ammonia concentration difference is obtained, carrying out normalization treatment on the ammonia concentration difference to obtain a normalized value of the ammonia concentration difference, wherein the normalized value is greater than zero and less than 1; and then searching from the ammonia storage deviation curve based on the normalized value to obtain an ammonia storage deviation value.
S403, adding the ammonia storage deviation value and the theoretical ammonia storage value.
And adding the two to obtain the actual ammonia storage value of the ccSCR.
S404, correcting the ammonia storage set value according to the actual ammonia storage value.
Specifically, the actual ammonia storage value is subtracted from the ammonia storage set value to obtain a difference value of the ammonia storage set value and the actual ammonia storage value, and the urea injection quantity of the ccSCR is subjected to closed-loop control based on the difference value to ensure that ammonia leakage does not occur in the ccSCR, so that standard emission of the diesel engine is ensured.
As can be seen from the above technical solution, the present embodiment provides a method for correcting an ammonia storage set value, specifically, calculating a gas component and an exhaust gas flow of an inlet of a ccSCR based on a ccSCR physical model, so as to obtain a theoretical ammonia storage value of the ccSCR, and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration downstream of the theoretical ammonia storage value; correcting the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration; correcting the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR to obtain corrected actual measured ammonia concentration; and correcting the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value, so that the double-SCR injection system can execute urea injection according to the corrected ammonia storage set value, and standard emission of the diesel engine is ensured.
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.
FIG. 6 is a block diagram of an ammonia storage setting correction device according to an embodiment of the present application.
As shown in fig. 6, the correction device for the ammonia storage setting value provided in the present embodiment includes a concentration calculation module 10, a first correction module 20, a second correction module 30, and a correction output module 40.
The concentration calculation module is used for calculating a theoretical ammonia storage value of ccSCR and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration downstream.
Specifically, the gas composition and the exhaust gas flow of the inlet of the ccSCR are calculated based on a ccSCR physical model, so that a theoretical ammonia storage value of the ccSCR, and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration downstream of the ccSCR are obtained. The ccSCR physical model is a calculation tool obtained by training a neural network based on a training sample, wherein the training sample is obtained by actually measuring various parameters of the entity ccSCR in the working process to obtain parameter values, the parameter values comprise input parameters and output parameters, the input parameters comprise but are not limited to gas components and exhaust gas flow, and the output parameters comprise but are not limited to theoretical nitrogen oxide concentration, theoretical ammonia storage value and theoretical ammonia concentration.
The first correction module is used for correcting the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration.
After the theoretical ammonia concentration is obtained, the theoretical ammonia concentration is corrected based on a preset step, so that the corrected theoretical ammonia concentration is obtained.
The temperature acquisition unit is used for acquiring the working temperature of the ccSCR.
In view of the fact that the dual SCR is provided with a corresponding temperature sensor, the temperature detected by the temperature sensor provided at the ccSCR can be acquired via the data bus, thereby acquiring the operating temperature of the ccSCR.
The first lookup unit is used for looking up a temperature correction coefficient from the sensitive temperature curve according to the working temperature.
On the basis of obtaining the working temperature of the ccSCR, searching from a preset sensitive temperature curve based on the temperature curve to obtain a temperature correction parameter corresponding to the working temperature.
The first correction unit is used for correcting the theoretical ammonia concentration according to the temperature correction parameters.
Specifically, the temperature correction parameter is multiplied by the theoretical ammonia concentration to obtain the corrected theoretical ammonia concentration.
The second correction module is used for correcting the theoretical nitrogen oxide concentration according to the upstream nitrogen oxide concentration.
That is, the theoretical nitrogen oxide concentration is corrected by the nitrogen oxide concentration upstream of ccSCR, and the corrected measured ammonia concentration is finally obtained. The module comprises a concentration acquisition unit, a first difference unit, a second table lookup unit and a second correction unit.
The concentration acquisition unit is used for acquiring the concentration of nitrogen oxides upstream of ccSCR.
That is, the obtained nitrogen oxide concentration value is collected from a nitrogen oxide sensor disposed upstream of the ccSCR, and the nitrogen oxide concentration upstream of the ccSCR is obtained.
The first differencing unit is used to subtract the theoretical nox concentration from the upstream nox concentration.
The theoretical nitrogen oxide concentration calculated by the ccSCR physical model is subtracted from the nitrogen oxide concentration value at the upstream of the ccSCR, and is taken as the actual measurement ammonia concentration, namely the corresponding nitrogen oxide sensor is taken as a virtual ammonia sensor.
The second lookup unit is used for looking up the sensor sensitivity correction coefficient based on the current working parameter.
The sensor sensitivity correction coefficient corresponding to the working parameter is obtained by searching from the sensor correction curve based on the current working parameter of the diesel engine. The sensor correction curve is obtained by bench test of the diesel engine through the transferred ammonia test equipment, so as to obtain a correction coefficient corresponding to the corresponding working parameter of the diesel engine. The operating parameter here is temperature or air-fuel ratio.
The second correction unit is used for performing correction processing on the actually measured ammonia concentration based on the sensor sensitivity correction coefficient.
The correction coefficient is multiplied by the measured ammonia concentration obtained above, thereby obtaining a corrected measured ammonia concentration.
The correction output module is used for correcting the ammonia storage set value of the ccSCR to obtain a corrected ammonia storage set value.
And correcting the ammonia storage set value of the ccSCR on the basis of the corrected theoretical nitrogen oxide concentration, the corrected theoretical ammonia concentration and the corrected actual ammonia concentration to obtain a corrected ammonia storage set value. The correction output module comprises a second difference solving unit, a third table look-up unit, an addition calculation unit and a third correction unit.
The second difference unit is used for subtracting the corrected theoretical ammonia concentration from the corrected measured concentration.
By subtracting the two, a difference in ammonia concentration is obtained.
The third table lookup unit is used for looking up an ammonia storage deviation value corresponding to the ammonia concentration difference according to the normalized value of the ammonia concentration difference.
After the ammonia concentration difference is obtained, carrying out normalization treatment on the ammonia concentration difference to obtain a normalized value of the ammonia concentration difference, wherein the normalized value is greater than zero and less than 1; and then searching from the ammonia storage deviation curve based on the normalized value to obtain an ammonia storage deviation value.
The addition calculation unit is used for adding the ammonia storage deviation value and the theoretical ammonia storage value.
By adding the two, the actual ammonia storage value of the ccSCR is obtained.
The third correction unit is used for correcting the ammonia storage set value according to the actual ammonia storage value.
Specifically, the actual ammonia storage value is subtracted from the ammonia storage set value to obtain a difference value of the ammonia storage set value and the actual ammonia storage value, and the urea injection quantity of the ccSCR is subjected to closed-loop control based on the difference value to ensure that ammonia leakage does not occur in the ccSCR, so that standard emission of the diesel engine is ensured.
As can be seen from the above technical solution, the present embodiment provides a correction device for an ammonia storage set value, specifically, based on a ccSCR physical model, calculating a gas component and an exhaust gas flow of an inlet of the ccSCR, so as to obtain a theoretical ammonia storage value of the ccSCR, and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration downstream of the theoretical ammonia storage value; correcting the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration; correcting the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR to obtain corrected actual measured ammonia concentration; and correcting the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value, so that the double-SCR injection system can execute urea injection according to the corrected ammonia storage set value, and standard emission of the diesel engine is ensured.
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.
Fig. 7 is a block diagram of an electronic device according to an embodiment of the present application.
Referring to fig. 7, a schematic diagram 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.) 701 that may perform various appropriate actions and processes in accordance with programs stored in a read-only memory ROM702 or loaded from an input means 706 into a random access memory RAM 703. 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 704. An input/output (I/O) interface 705 is also connected to bus 704.
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 707 including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; storage 708 including, for example, magnetic tape, hard disk, etc.; and a communication device 709. The communication means 709 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.
The application also provides a computer-readable storage medium embodiment, which is applied to electronic equipment and is used for carrying one or more computer programs, wherein when the one or more computer programs are executed by the electronic equipment, the electronic equipment calculates the gas composition and the exhaust gas flow of an inlet of the ccSCR based on a ccSCR physical model to obtain a theoretical ammonia storage value of the ccSCR and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration at the downstream of the theoretical ammonia storage value; correcting the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration; correcting the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR to obtain corrected actual measured ammonia concentration; and correcting the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value, so that the double-SCR injection system can execute urea injection according to the corrected ammonia storage set value, and standard emission of the diesel engine is ensured.
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 (4)
1. A correction method of an ammonia storage set point applied to an electronic device of a diesel engine provided with a dual SCR injection system including ccSCR, characterized by comprising the steps of:
calculating the gas component and the exhaust gas flow of an inlet of the ccSCR based on a ccSCR physical model to obtain a theoretical ammonia storage value of the ccSCR and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration at the downstream of the theoretical ammonia storage value;
and correcting the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration, wherein the method specifically comprises the following steps of: acquiring the working temperature of the ccSCR, searching a temperature correction parameter from a sensitive temperature curve according to the working temperature, and correcting the theoretical ammonia concentration according to the temperature correction parameter to obtain the corrected theoretical ammonia concentration;
correcting the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR to obtain corrected actual measured ammonia concentration, wherein the method specifically comprises the following steps: acquiring the nitrogen oxide concentration at the upstream of the ccSCR, subtracting the theoretical nitrogen oxide concentration from the nitrogen oxide concentration to obtain an actual measured ammonia concentration, searching from a sensor correction curve based on the current working parameters of the diesel engine to obtain a sensor sensitivity correction coefficient, and correcting the actual measured ammonia concentration based on the sensor sensitivity correction coefficient to obtain a corrected actual measured ammonia concentration;
correcting the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value, so that the dual-SCR injection system can execute urea injection according to the corrected ammonia storage set value, and the method specifically comprises the following steps: subtracting the corrected theoretical ammonia concentration from the corrected actual ammonia concentration to obtain an ammonia concentration difference, searching an ammonia storage deviation value corresponding to the ammonia concentration difference according to a normalized value of the ammonia concentration difference, adding the ammonia storage deviation value to the theoretical ammonia storage value to obtain an actual ammonia storage value, and correcting the ammonia storage set value according to the actual ammonia storage value to obtain the corrected ammonia storage set value.
2. A correction device of ammonia storage set point, applied to the electronic equipment of a diesel engine, said diesel engine being provided with a double SCR injection system comprising ccSCR, characterized in that it comprises:
the concentration calculation module is configured to calculate the gas component and the exhaust gas flow of the inlet of the ccSCR based on a ccSCR physical model to obtain a theoretical ammonia storage value of the ccSCR and a theoretical nitrogen oxide concentration and a theoretical ammonia concentration at the downstream of the theoretical ammonia storage value;
the first correction module is configured to correct the theoretical ammonia concentration to obtain corrected theoretical ammonia concentration, and comprises a temperature acquisition unit, a first table lookup unit and a first correction unit, wherein the temperature acquisition unit is used for acquiring the working temperature of the ccSCR, the first table lookup unit is used for searching a temperature correction parameter from a sensitive temperature curve according to the working temperature, and the first correction unit is used for correcting the theoretical ammonia concentration according to the temperature correction parameter to obtain corrected theoretical ammonia concentration;
the second correction module is configured to perform correction processing on the theoretical nitrogen oxide concentration according to the nitrogen oxide concentration at the upstream of the ccSCR to obtain a corrected actual ammonia concentration, the second correction module comprises a concentration acquisition unit, a first difference unit, a second lookup table unit and a second correction unit, the concentration acquisition unit is used for acquiring the nitrogen oxide concentration at the upstream of the ccSCR, the first difference unit is used for subtracting the theoretical nitrogen oxide concentration from the nitrogen oxide concentration to obtain an actual ammonia concentration, the second lookup table unit is used for searching from a sensor correction curve based on the current working parameter of the diesel engine to obtain a sensor sensitivity correction coefficient, and the second correction unit is used for performing correction processing on the actual ammonia concentration based on the sensor sensitivity correction coefficient to obtain the corrected actual ammonia concentration;
the correction output module is configured to correct the ammonia storage set value of the ccSCR according to the theoretical ammonia storage value, the corrected actual ammonia concentration and the corrected theoretical ammonia concentration to obtain a corrected ammonia storage set value, so that the double-SCR injection system can execute urea injection according to the corrected ammonia storage set value, the correction output module comprises a second difference solving unit, a third table lookup unit, an addition calculation unit and a third correction unit, the second difference solving unit is used for subtracting the corrected theoretical ammonia concentration from the corrected actual ammonia concentration to obtain an ammonia concentration difference, the third table lookup unit is used for searching an ammonia storage deviation value corresponding to the ammonia concentration difference according to a normalized value of the ammonia concentration difference, the addition calculation unit is used for adding the ammonia storage deviation value and the theoretical ammonia storage value to obtain an actual ammonia storage value, and the third correction unit is used for correcting the ammonia storage set value according to the actual ammonia storage value to obtain the corrected ammonia storage set value.
3. An electronic device for use in a diesel engine provided with a dual SCR injection system comprising a ccSCR, characterized in that the electronic device comprises at least one processor and a memory connected to the processor, wherein:
the memory is used for storing a computer program or instructions;
the processor is configured to process the computer program or instructions to cause the electronic device to implement the method for correcting an ammonia storage setting as set forth in claim 1.
4. A storage medium for use in an electronic device, wherein the storage medium carries one or more computer programs executable by the electronic device to enable the electronic device to implement the method of correcting an ammonia storage setting as claimed in claim 1.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837480A (en) * | 2016-12-26 | 2017-06-13 | 潍柴动力股份有限公司 | A kind of urea injecting quantity control method and post processing control system based on model |
| CN106837497A (en) * | 2017-02-24 | 2017-06-13 | 天津大学 | Diesel catalyst based on storage ammonia amount management in real time reduces method for urea injection control |
| CN108087065A (en) * | 2017-11-01 | 2018-05-29 | 联创汽车电子有限公司 | SCR catalyst ammonia density modification method and SCR processing systems |
| DE102019205107A1 (en) * | 2019-04-10 | 2020-10-15 | Robert Bosch Gmbh | Method for determining an ammonia mass flow |
| DE102019118526A1 (en) * | 2019-07-09 | 2021-01-14 | Volkswagen Aktiengesellschaft | Process for exhaust aftertreatment of an internal combustion engine and exhaust aftertreatment system |
| CN112627945A (en) * | 2020-12-01 | 2021-04-09 | 潍柴动力股份有限公司 | Method, device and equipment for correcting urea injection amount and storage medium |
| CN113700544A (en) * | 2021-09-23 | 2021-11-26 | 潍柴动力股份有限公司 | Method and device for judging cheating of nitrogen-oxygen sensor |
| CN116357435A (en) * | 2023-03-30 | 2023-06-30 | 中国汽车技术研究中心有限公司 | Method, device and medium for controlling emission of diesel engine |
-
2023
- 2023-08-31 CN CN202311111642.4A patent/CN116838461B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837480A (en) * | 2016-12-26 | 2017-06-13 | 潍柴动力股份有限公司 | A kind of urea injecting quantity control method and post processing control system based on model |
| CN106837497A (en) * | 2017-02-24 | 2017-06-13 | 天津大学 | Diesel catalyst based on storage ammonia amount management in real time reduces method for urea injection control |
| CN108087065A (en) * | 2017-11-01 | 2018-05-29 | 联创汽车电子有限公司 | SCR catalyst ammonia density modification method and SCR processing systems |
| DE102019205107A1 (en) * | 2019-04-10 | 2020-10-15 | Robert Bosch Gmbh | Method for determining an ammonia mass flow |
| CN111810279A (en) * | 2019-04-10 | 2020-10-23 | 罗伯特·博世有限公司 | Method for determining an ammonia mass flow |
| DE102019118526A1 (en) * | 2019-07-09 | 2021-01-14 | Volkswagen Aktiengesellschaft | Process for exhaust aftertreatment of an internal combustion engine and exhaust aftertreatment system |
| CN112627945A (en) * | 2020-12-01 | 2021-04-09 | 潍柴动力股份有限公司 | Method, device and equipment for correcting urea injection amount and storage medium |
| CN113700544A (en) * | 2021-09-23 | 2021-11-26 | 潍柴动力股份有限公司 | Method and device for judging cheating of nitrogen-oxygen sensor |
| CN116357435A (en) * | 2023-03-30 | 2023-06-30 | 中国汽车技术研究中心有限公司 | Method, device and medium for controlling emission of diesel engine |
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