CN117927398A - Tail gas recirculation control system, method, electronic equipment and medium - Google Patents
Tail gas recirculation control system, method, electronic equipment and medium Download PDFInfo
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- CN117927398A CN117927398A CN202410326176.XA CN202410326176A CN117927398A CN 117927398 A CN117927398 A CN 117927398A CN 202410326176 A CN202410326176 A CN 202410326176A CN 117927398 A CN117927398 A CN 117927398A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000013507 mapping Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000002452 interceptive effect Effects 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 22
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000004064 recycling Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 321
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 18
- 238000002485 combustion reaction Methods 0.000 description 12
- 229910021529 ammonia Inorganic materials 0.000 description 11
- 230000001276 controlling effect Effects 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical class [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000802 evaporation-induced self-assembly Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/36—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for adding fluids other than exhaust gas to the recirculation passage; with reformers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The application provides a tail gas recirculation control system, a method, electronic equipment and a medium, wherein a premixing control module for controlling the temperature of discharged tail gas is arranged in the tail gas recirculation control system, and the premixing control module can establish gas circulation between a tail gas input pipeline and a premixing pipeline through a control valve when the working condition temperature of the discharged tail gas is greater than a preset threshold value, so that the discharged tail gas is mixed with ammonia gas generated by a gas tank to form mixed discharged gas before entering a gas mixer. The mixing of the ammonia gas and the exhaust tail gas improves the gas density of the exhaust tail gas, so that the working condition temperature of the exhaust tail gas is effectively cooled, and the energy conversion efficiency of the tail gas recycling technology is ensured.
Description
Technical Field
The present application relates to the field of tail gas control technologies, and in particular, to a tail gas recirculation control system, a method, an electronic device, and a medium.
Background
With the increase of environmental pollution, the reduction of carbon emission of tail gas and the influence of the emitted tail gas on the environment become the problem which is not negligible at present. In the current exhaust gas control technology, ammonia is generally used as an alternative combustion energy source, and combustion products of the ammonia are mainly nitrogen and water, so that pollution and influence on the environment are avoided, and ammonia is often used as fuel of an engine in the prior art, so that carbon emission is reduced.
In the current carbon emission control technology, it is generally based on EGR (Exhaust Gas Recirculation ) technology, which is a technology for reducing nitrogen oxide emissions inside an engine. By reintroducing a portion of the exhaust gas into the engine interior, the temperature within the combustion chamber may be reduced, thereby reducing the formation of nitrogen oxides. In the EGR technology, it is necessary to mix exhaust gas generated from an engine with external air and reduce the generation of nitrogen oxides. However, in the current EGR technology, when the engine is under a high-load working condition, the combustion temperature of the engine is higher, and the high-temperature exhaust gas generated by the engine cannot be cooled by conventional cooling equipment to reduce the temperature, and the density of the exhaust gas is reduced due to the excessively high exhaust gas temperature, so that the energy conversion efficiency of the exhaust gas recirculation technology is affected.
Therefore, how to solve the problem of low energy conversion efficiency of the tail gas recycling technology in the prior art is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
Based on the problems, in order to solve the problem of low energy conversion efficiency of the tail gas recycling technology in the prior art, the application provides a tail gas recycling control system, a tail gas recycling control method, electronic equipment and a medium.
The embodiment of the application discloses the following technical scheme:
In a first aspect, the present application discloses an exhaust gas recirculation control system comprising: the device comprises a tail gas input pipeline, a premixing pipeline, a control valve, a gas tank, a premixing control module and a gas mixer; one end of the premixing pipeline is connected with the gas tank through the control valve, and the other end of the premixing pipeline is connected with the tail gas input pipeline; the tail gas input pipeline is used for inputting the exhaust tail gas into the gas mixer; the premixing pipeline is used for conveying the ammonia gas from the gas tank to the tail gas input pipeline;
The premixing control module is used for establishing gas circulation between the tail gas input pipeline and the premixing pipeline through the control valve when the working condition temperature of the discharged tail gas is greater than a preset threshold value; when the tail gas input pipeline is communicated with the premixing pipeline, the discharged tail gas is mixed with the ammonia gas to form mixed discharged gas; the working condition temperature of the mixed exhaust gas is lower than the working condition temperature of the exhaust tail gas.
Optionally, the exhaust gas recirculation control system further includes: a direct mixing control module and a direct mixing pipeline; one end of the direct mixing pipeline is connected with the gas tank through the control valve, and the other end of the direct mixing pipeline is connected with the gas mixer; the direct mixing pipeline is used for conveying the ammonia gas from the gas tank to the gas mixer;
and the direct mixing control module is used for establishing connection between the direct mixing pipeline and the gas mixer through the control valve when the working condition temperature of the exhaust tail gas is not higher than the preset threshold value.
Optionally, the exhaust gas recirculation control system further includes: an engine and a temperature acquisition module; the temperature acquisition module is specifically configured to:
acquiring the working condition temperature of the engine;
And determining the working condition temperature of the exhaust according to a preset mapping relation between the working condition temperature of the engine and the working condition temperature of the exhaust.
Optionally, the exhaust gas recirculation control system further includes: an engine self-checking module; the engine self-checking module is specifically used for:
When an engine starting instruction is received, performing equipment self-checking on the engine to obtain a self-checking result of the engine; the engine starting instruction is generated based on an external interactive terminal;
and if the self-checking result of the engine is a fault, generating a device alarm signal.
Optionally, the exhaust gas recirculation control system further includes:
And the temperature monitoring module is used for inputting the mixed exhaust gas into the gas mixer when the working condition temperature of the mixed exhaust gas is lower than the preset threshold value.
In a second aspect, the present application discloses a method for controlling exhaust gas recirculation, which is applied to an EGR system; the EGR system includes: the device comprises a tail gas input pipeline, a premixing pipeline, a control valve, a gas tank, a premixing control module and a gas mixer; one end of the premixing pipeline is connected with the gas tank through the control valve, and the other end of the premixing pipeline is connected with the tail gas input pipeline; the tail gas input pipeline is used for inputting the exhaust tail gas into the gas mixer; the premixing pipeline is used for conveying the ammonia gas from the gas tank to the tail gas input pipeline; the method comprises the following steps:
when the working condition temperature of the discharged tail gas is greater than a preset threshold value, establishing gas circulation between the tail gas input pipeline and the premixing pipeline through the control valve; when the tail gas input pipeline is communicated with the premixing pipeline, the discharged tail gas is mixed with the ammonia gas to form mixed discharged gas; the working condition temperature of the mixed exhaust gas is lower than the working condition temperature of the exhaust tail gas.
Optionally, the EGR system further includes: a direct mixing pipeline; one end of the direct mixing pipeline is connected with the gas tank through the control valve, and the other end of the direct mixing pipeline is connected with the gas mixer; when the working condition temperature of the exhaust tail gas is greater than a preset threshold value, before the connection between the tail gas input pipeline and the premixing pipeline is established through the control valve, the method further comprises the following steps:
and when the working condition temperature of the exhaust tail gas is not higher than the preset threshold value, the direct mixing pipeline is connected with the gas mixer through the control valve.
Optionally, the EGR system further includes: an engine; when the working condition temperature of the exhaust tail gas is greater than a preset threshold value, before the connection between the tail gas input pipeline and the premixing pipeline is established through the control valve, the method further comprises the following steps:
acquiring the working condition temperature of the engine;
And determining the working condition temperature of the exhaust according to a preset mapping relation between the working condition temperature of the engine and the working condition temperature of the exhaust.
In a third aspect, the present application discloses an electronic device, the device comprising: a processor, memory, system bus;
the processor and the memory are connected through the system bus;
the memory is configured to store one or more programs, the one or more programs comprising instructions, which when executed by the processor, cause the processor to perform the exhaust gas recirculation control method.
In a fourth aspect, the present application discloses a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the exhaust gas recirculation control method.
Compared with the prior art, the application has the following beneficial effects: the application provides an exhaust gas recirculation control system, an exhaust gas recirculation control method, electronic equipment and a medium, wherein the exhaust gas recirculation control system comprises the following components: the device comprises a tail gas input pipeline, a premixing pipeline, a control valve, a gas tank, a premixing control module and a gas mixer; one end of the premixing pipeline is connected with the gas tank through the control valve, and the other end of the premixing pipeline is connected with the tail gas input pipeline; the tail gas input pipeline is used for inputting the exhaust tail gas into the gas mixer; the premixing pipeline is used for conveying the ammonia gas from the gas tank to the tail gas input pipeline; the premixing control module is used for establishing gas circulation between the tail gas input pipeline and the premixing pipeline through the control valve when the working condition temperature of the discharged tail gas is greater than a preset threshold value; when the tail gas input pipeline is communicated with the premixing pipeline, the discharged tail gas is mixed with the ammonia gas to form mixed discharged gas; the working condition temperature of the mixed exhaust gas is lower than the working condition temperature of the exhaust tail gas. In the system, the premixing control module for controlling the temperature of the exhaust gas is arranged in the system, and the premixing control module can establish gas circulation between the exhaust gas input pipeline and the premixing pipeline through the control valve when the working condition temperature of the exhaust gas is greater than a preset threshold value, so that the exhaust gas is mixed with ammonia gas generated by the gas tank to form mixed exhaust gas before entering the gas mixer. The mixing of the ammonia gas and the exhaust tail gas improves the gas density of the exhaust tail gas, so that the working condition temperature of the exhaust tail gas is effectively cooled, and the energy conversion efficiency of the tail gas recycling technology is ensured.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an exhaust gas recirculation control system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another exhaust treatment system according to an embodiment of the present application;
FIG. 3 is a schematic flow chart of an exhaust gas recirculation control method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device for controlling exhaust gas recirculation according to an embodiment of the present application.
Detailed Description
As described above, with the increase in environmental pollution, reduction of carbon emissions of exhaust gas and the influence of exhaust gas on the environment are now not negligible problems. In the current exhaust gas control technology, ammonia is generally used as an alternative combustion energy source, and the combustion products of the ammonia are mainly ammonia and water, so that pollution and influence on the environment are avoided, and ammonia is often used as fuel of an engine in the prior art, so that carbon emission is reduced.
In the current carbon emission control technology, it is generally performed based on EGR technology, which is a technology for reducing nitrogen oxide emissions inside an engine. By reintroducing a portion of the exhaust gas into the engine interior, the temperature within the combustion chamber may be reduced, thereby reducing the formation of nitrogen oxides. In the EGR technology, it is necessary to mix exhaust gas generated from an engine with external air and reduce the generation of nitrogen oxides. However, in the current EGR technology, when the engine is under a high-load working condition, the combustion temperature of the engine is higher, and the high-temperature exhaust gas generated by the engine cannot be cooled by conventional cooling equipment to reduce the temperature, and the density of the exhaust gas is reduced due to the excessively high exhaust gas temperature, so that the energy conversion efficiency of the exhaust gas recirculation technology is affected.
In order to solve the above problems, the present application provides an exhaust gas recirculation control system, an exhaust gas recirculation control method, an electronic device, and a medium, wherein the exhaust gas recirculation control system of the present application includes: the device comprises a tail gas input pipeline, a premixing pipeline, a control valve, a gas tank, a premixing control module and a gas mixer; one end of the premixing pipeline is connected with the gas tank through the control valve, and the other end of the premixing pipeline is connected with the tail gas input pipeline; the tail gas input pipeline is used for inputting the exhaust tail gas into the gas mixer; the premixing pipeline is used for conveying the ammonia gas from the gas tank to the tail gas input pipeline; the premixing control module is used for establishing gas circulation between the tail gas input pipeline and the premixing pipeline through the control valve when the working condition temperature of the discharged tail gas is greater than a preset threshold value; when the tail gas input pipeline is communicated with the premixing pipeline, the discharged tail gas is mixed with the ammonia gas to form mixed discharged gas; the working condition temperature of the mixed exhaust gas is lower than the working condition temperature of the exhaust tail gas. In the system, the premixing control module for controlling the temperature of the exhaust gas is arranged in the system, and the premixing control module can establish gas circulation between the exhaust gas input pipeline and the premixing pipeline through the control valve when the working condition temperature of the exhaust gas is greater than a preset threshold value, so that the exhaust gas is mixed with ammonia gas generated by the gas tank to form mixed exhaust gas before entering the gas mixer. The mixing of the ammonia gas and the exhaust tail gas improves the gas density of the exhaust tail gas, so that the working condition temperature of the exhaust tail gas is effectively cooled, and the energy conversion efficiency of the tail gas recycling technology is ensured.
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, 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.
Referring to fig. 1, the structure of an exhaust gas recirculation control system according to an embodiment of the present application includes an exhaust gas input pipe 100, a premixing pipe 200, a control valve 300, a premixing control module 400, and a gas mixer 500. Wherein one end of the premixing pipeline 200 is connected with the gas tank 800 through a control valve, and the other end is connected with the tail gas input pipeline 100.
In the conventional EGR technology, it is necessary to mix exhaust gas generated from an engine with external air for combustion, thereby reducing the generation of carbon oxides during combustion. Meanwhile, in the process of mixing and burning the exhaust gas and the external air, ammonia gas is generally added to mix and burn with the exhaust gas so as to generate nitrogen gas which has bad influence on the environment. Specifically, the structural schematic diagram of another exhaust gas treatment system disclosed in fig. 2 may be referred to for combined understanding.
In the tail gas recirculation control system provided by the embodiment of the application, one end of the premixing pipeline is connected with the gas tank through the control valve, and when the control valve is communicated with the communication between the premixing pipeline and the tail gas input pipeline, the ammonia gas in the gas tank can be premixed with the exhaust tail gas in the tail gas input pipeline through the premixing pipeline to form mixed exhaust gas. The premix control module described below may be further understood with particular reference to the schematic configuration of another exhaust gas treatment system disclosed in FIG. 2.
The premixing control module 400 is configured to establish gas circulation between the tail gas input pipeline and the premixing pipeline through the control valve when the working condition temperature of the exhaust tail gas is greater than a preset threshold; when the tail gas input pipeline is communicated with the premixing pipeline, the discharged tail gas is mixed with the ammonia gas to form mixed discharged gas; the working condition temperature of the mixed exhaust gas is lower than the working condition temperature of the exhaust tail gas.
The premixing control module is used for controlling the control valve according to the working condition temperature of the exhaust discharged in the exhaust discharge pipeline, so as to control the mixing between the exhaust discharged in the exhaust input pipeline and the ammonia. Specifically, the premixing control module monitors the working condition temperature of the exhaust in the exhaust pipeline in real time, and when the working condition temperature of the exhaust is greater than a preset threshold value, the premixing control module controls the control valve at the moment so as to establish gas circulation between the exhaust input pipeline and the premixing pipeline, so that the exhaust in the exhaust input pipeline is mixed with ammonia in advance before entering the gas mixer.
The premixing control module can continuously monitor the working condition temperature of the exhaust in the exhaust input pipeline, and when the working condition temperature of the exhaust is too high, namely, is larger than a preset threshold value, the working condition temperature of the exhaust is not beneficial to EGR, and the exhaust needs to be cooled. Therefore, the connection between the tail gas input pipeline and the premixing pipeline is established at the moment, and when the exhaust tail does not enter the gas mixer to be mixed with air, the exhaust tail is premixed with ammonia gas generated in the gas tank. When the exhaust tail gas is mixed with ammonia gas in advance to form mixed exhaust gas, the overall gas density is improved, and further, the temperature of the ammonia gas generated by the gas tank belongs to the ambient temperature. Therefore, when the ammonia gas and the exhaust gas are mixed to form a mixed exhaust gas, the operating temperature of the mixed exhaust gas can be effectively cooled based on the increase of the gas density and the mixing of the ambient temperature. There is an inverse relationship between the density of the gas and the temperature, i.e. the temperature decreases as the density increases. This is because, at a constant pressure, the gas molecules become more active as the temperature increases and have a greater kinetic energy. This means that the interactions between the molecules will decrease and the average distance of the molecules will increase, thereby increasing the volume of the gas. Therefore, when the ammonia gas is mixed with the exhaust gas, the gas density of the exhaust gas is improved, and the working condition temperature of the corresponding mixed exhaust gas is effectively cooled, so that the EGR treatment efficiency in the gas mixer is ensured.
As an optional implementation manner, in the exhaust gas recirculation control system according to the embodiment of the present application, the exhaust gas recirculation control system further includes: a direct mixing control module 700 and a direct mixing pipe 600; one end of the direct mixing pipeline 600 is connected with the gas tank through the control valve, and the other end is connected with the gas mixer; the direct mixing pipeline is used for conveying the ammonia gas from the gas tank to the gas mixer;
and the direct mixing control module is used for establishing connection between the direct mixing pipeline and the gas mixer through the control valve when the working condition temperature of the exhaust tail gas is not higher than the preset threshold value.
Referring also to fig. 1, it can be seen that the exhaust gas recirculation control system of the present application further includes a direct mixing pipe and a direct mixing control module. The direct mixing pipeline is used for directly inputting the ammonia gas from the gas tank to the gas mixer. The direct mixing control module can also monitor the temperature of the exhaust tail gas in the tail gas input pipeline. When the exhaust gas in the exhaust gas input pipeline does not exceed the preset threshold value, the temperature of the exhaust gas at the moment is indicated not to influence the treatment efficiency of the EGR, so that the ammonia gas can be directly input into the gas mixer to be mixed with the exhaust gas at the moment, and the gas mixing step in the EGR is executed. Furthermore, when ammonia is input into the gas mixer through the direct mixing control pipeline, the input temperature of the ammonia can be further increased according to the temperature of the exhaust gas, so that the combustion efficiency of gas in the gas mixer is improved, and the overall EGR efficiency is improved.
As another alternative embodiment, in the exhaust gas recirculation control system of the present application, further comprising: an engine and a temperature acquisition module; the temperature acquisition module is specifically configured to:
acquiring the working condition temperature of the engine;
And determining the working condition temperature of the exhaust according to a preset mapping relation between the working condition temperature of the engine and the working condition temperature of the exhaust.
The temperature acquisition module is mainly used for acquiring the working condition temperature of exhaust in an exhaust gas input pipeline, specifically, the temperature acquisition module firstly acquires the working condition temperature of an engine and determines the working condition temperature of the exhaust gas based on the working condition temperature of an actual engine. In the process, the working condition temperature of the tail gas is determined specifically through a preset mapping relation between the working condition temperature of the engine and the working condition temperature of the exhaust gas. The map is associated with a particular engine type, operating principles, and emission control system. In practical application scenarios, the operating temperature of the exhaust gas may be affected by various factors, such as the workload of the engine, the rotational speed, the combustion efficiency, and the operating condition of the emission control system. These factors may have an effect on the temperature of the exhaust gases. Therefore, in the process of establishing the preset mapping relationship, various working parameters and analysis data of the engine are required to be acquired, and engineering analysis and modeling are carried out by taking the working parameters and the analysis data as analysis basis, so that the mapping relationship between the working condition temperature of the engine and the temperature of the exhaust gas is established.
As another alternative embodiment, the exhaust gas recirculation control system further includes: an engine self-checking module; the engine self-checking module is specifically used for:
When an engine starting instruction is received, performing equipment self-checking on the engine to obtain a self-checking result of the engine; the engine starting instruction is generated based on an external interactive terminal;
and if the self-checking result of the engine is a fault, generating a device alarm signal.
Before the exhaust gas temperature in the exhaust gas input pipeline is monitored and regulated, it is necessary to determine whether the equipment running state of the engine is normal. In the process of checking equipment of the engine, the equipment self-checking of the engine can be carried out when an engine starting instruction generated by an external interactive terminal is received. When the self-checking result of the engine is a fault, generating an equipment alarm signal, and ensuring the equipment operation safety of the engine. The self-test for the engine can be performed by using an OBD (On-Board Diagnostics, on-board diagnosis) scanner, and the OBD scanner is a device for reading information of a vehicle diagnosis system. Such devices are typically insertable into an OBD interface of a vehicle for communication and interaction with a diagnostic system of the vehicle.
The OBD scanner functions to read fault codes and diagnostic data of the vehicle, which may provide information regarding the engine, exhaust system, vehicle electronic control unit, etc. Through connecting the OBD scanner, the vehicle owner can acquire the diagnosis information of the vehicle, so that potential problems and faults are identified, and corresponding repair and maintenance are performed.
As another alternative embodiment, the exhaust gas recirculation control system further includes: and the temperature monitoring module is used for inputting the mixed exhaust gas into the gas mixer when the working condition temperature of the mixed exhaust gas is lower than the preset threshold value.
When ammonia gas and exhaust gas are mixed, the density of the mixed exhaust gas formed by the ammonia gas and the exhaust gas is continuously increased, and the temperature is continuously reduced. In the process, the temperature monitoring module is used for monitoring the working condition temperature of the mixed exhaust gas in real time, and when the working condition temperature of the mixed exhaust gas is lower than a preset threshold value, the temperature of the mixed exhaust gas is indicated to not influence the treatment of EGR, so that the mixed exhaust gas can be input into the gas mixer.
The application provides an exhaust gas recirculation control system, which comprises: the device comprises a tail gas input pipeline, a premixing pipeline, a control valve, a gas tank, a premixing control module and a gas mixer; one end of the premixing pipeline is connected with the gas tank through the control valve, and the other end of the premixing pipeline is connected with the tail gas input pipeline; the tail gas input pipeline is used for inputting the exhaust tail gas into the gas mixer; the premixing pipeline is used for conveying the ammonia gas from the gas tank to the tail gas input pipeline; the premixing control module is used for establishing gas circulation between the tail gas input pipeline and the premixing pipeline through the control valve when the working condition temperature of the discharged tail gas is greater than a preset threshold value; when the tail gas input pipeline is communicated with the premixing pipeline, the discharged tail gas is mixed with the ammonia gas to form mixed discharged gas; the working condition temperature of the mixed exhaust gas is lower than the working condition temperature of the exhaust tail gas. In the system, the premixing control module for controlling the temperature of the exhaust gas is arranged in the system, and the premixing control module can establish gas circulation between the exhaust gas input pipeline and the premixing pipeline through the control valve when the working condition temperature of the exhaust gas is greater than a preset threshold value, so that the exhaust gas is mixed with ammonia gas generated by the gas tank to form mixed exhaust gas before entering the gas mixer. The mixing of the ammonia gas and the exhaust tail gas improves the gas density of the exhaust tail gas, so that the working condition temperature of the exhaust tail gas is effectively cooled, and the energy conversion efficiency of the tail gas recycling technology is ensured.
An exhaust gas recirculation control method according to an embodiment of the present application is described below, and an exhaust gas recirculation control method described below and an exhaust gas recirculation control system described above may be referred to correspondingly.
Referring to fig. 3, the flow chart of an exhaust gas recirculation control method according to an embodiment of the present application is shown and applied to an EGR system; the EGR system includes: the device comprises a tail gas input pipeline, a premixing pipeline, a control valve, a gas tank, a premixing control module and a gas mixer; one end of the premixing pipeline is connected with the gas tank through the control valve, and the other end of the premixing pipeline is connected with the tail gas input pipeline; the tail gas input pipeline is used for inputting the exhaust tail gas into the gas mixer; the premixing pipeline is used for conveying the ammonia gas from the gas tank to the tail gas input pipeline; the method comprises the following steps:
S101: when the working condition temperature of the discharged tail gas is greater than a preset threshold value, establishing gas circulation between the tail gas input pipeline and the premixing pipeline through the control valve; when the tail gas input pipeline is communicated with the premixing pipeline, the discharged tail gas is mixed with the ammonia gas to form mixed discharged gas; the working condition temperature of the mixed exhaust gas is lower than the working condition temperature of the exhaust tail gas.
Optionally, the EGR system further includes: a direct mixing pipeline; one end of the direct mixing pipeline is connected with the gas tank through the control valve, and the other end of the direct mixing pipeline is connected with the gas mixer; when the working condition temperature of the exhaust tail gas is greater than a preset threshold value, before the connection between the tail gas input pipeline and the premixing pipeline is established through the control valve, the method further comprises the following steps:
and when the working condition temperature of the exhaust tail gas is not higher than the preset threshold value, the direct mixing pipeline is connected with the gas mixer through the control valve.
Optionally, the EGR system further includes: an engine; when the working condition temperature of the exhaust tail gas is greater than a preset threshold value, before the connection between the tail gas input pipeline and the premixing pipeline is established through the control valve, the method further comprises the following steps:
acquiring the working condition temperature of the engine;
And determining the working condition temperature of the exhaust according to a preset mapping relation between the working condition temperature of the engine and the working condition temperature of the exhaust.
Optionally, before the connection between the exhaust gas input pipeline and the premixing pipeline is established through the control valve when the working condition temperature of the exhaust gas is greater than a preset threshold, the method further includes:
When an engine starting instruction is received, performing equipment self-checking on the engine to obtain a self-checking result of the engine; the engine starting instruction is generated based on an external interactive terminal;
and if the self-checking result of the engine is a fault, generating a device alarm signal.
Optionally, when the working condition temperature of the exhaust gas is greater than a preset threshold, after the connection between the exhaust gas input pipeline and the premixing pipeline is established through the control valve, the method further includes:
And the temperature monitoring module is used for inputting the mixed exhaust gas into the gas mixer when the working condition temperature of the mixed exhaust gas is lower than the preset threshold value.
Referring to fig. 4, the schematic structural diagram of an electronic device for controlling exhaust gas recirculation according to an embodiment of the present application includes:
A memory 11 for storing a computer program;
A processor 12 for implementing the steps of the exhaust gas recirculation control method according to any of the method embodiments described above when executing the computer program.
In this embodiment, the device may be a vehicle-mounted computer, a PC (Personal Computer ), or a terminal device such as a smart phone, a tablet computer, a palm computer, a portable computer, etc.
The device may include a memory 11, a processor 12, and a bus 13.
The memory 11 includes at least one type of readable storage medium including flash memory, a hard disk, a multimedia card, a card memory (e.g., SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, etc. The memory 11 may in some embodiments be an internal storage unit of the device, such as a hard disk of the device. The memory 11 may also be an external storage device of the device, such as a plug-in hard disk provided on the device, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD), etc. in other embodiments. Further, the memory 11 may also include both an internal storage unit of the device and an external storage device. The memory 11 may be used not only for storing application software installed in the device and various types of data, such as program codes for executing a failure prediction method, etc., but also for temporarily storing data that has been output or is to be output. The processor 12 may be a central processing unit (Central Processing Unit, CPU) in some embodiments.
The processor 12 may in some embodiments be a central processing unit (Central Processing unit, CPU), controller, microcontroller, microprocessor or other data processing chip for running program code or processing data stored in the memory 11, such as program code for performing a fault prediction method, etc.
The bus 13 may be a peripheral component interconnect standard (PERIPHERAL COMPONENT INTERCONNECT, PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus, or the like. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in fig. 4, but not only one bus or one type of bus.
Further, the device may also include a network interface 14, and the network interface 14 may optionally include a wired interface and/or a wireless interface (e.g., WI-FI interface, bluetooth interface, etc.), typically used to establish a communication connection between the device and other electronic devices.
Optionally, the device may further comprise a user interface 15, the user interface 15 may comprise a Display (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 15 may further comprise a standard wired interface, a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch, or the like. The display may also be referred to as a display screen or display unit, as appropriate, for displaying information processed in the device and for displaying a visual user interface.
Fig. 4 shows only a device having components 11-15, it will be understood by those skilled in the art that the configuration shown in fig. 4 is not limiting of the device and may include fewer or more components than shown, or may combine certain components, or a different arrangement of components.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. In particular, for the method apparatus, the electronic device and the vehicle, since they are substantially similar to the method embodiments, the description is relatively simple, and the relevant points are referred to in the description of the method embodiments. The method device, the electronic apparatus and the vehicle described above are only schematic, wherein the units described as separate parts may or may not be physically separated, and the parts as unit prompts may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
The foregoing is only one specific embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims (10)
1. An exhaust gas recirculation control system, characterized by comprising: the device comprises a tail gas input pipeline, a premixing pipeline, a control valve, a gas tank, a premixing control module and a gas mixer; one end of the premixing pipeline is connected with the gas tank through the control valve, and the other end of the premixing pipeline is connected with the tail gas input pipeline; the tail gas input pipeline is used for inputting the exhaust tail gas into the gas mixer; the premixing pipeline is used for conveying the ammonia gas from the gas tank to the tail gas input pipeline;
The premixing control module is used for establishing gas circulation between the tail gas input pipeline and the premixing pipeline through the control valve when the working condition temperature of the discharged tail gas is greater than a preset threshold value; when the tail gas input pipeline is communicated with the premixing pipeline, the discharged tail gas is mixed with the ammonia gas to form mixed discharged gas; the working condition temperature of the mixed exhaust gas is lower than the working condition temperature of the exhaust tail gas.
2. The system of claim 1, further comprising: a direct mixing control module and a direct mixing pipeline; one end of the direct mixing pipeline is connected with the gas tank through the control valve, and the other end of the direct mixing pipeline is connected with the gas mixer; the direct mixing pipeline is used for conveying the ammonia gas from the gas tank to the gas mixer;
and the direct mixing control module is used for establishing connection between the direct mixing pipeline and the gas mixer through the control valve when the working condition temperature of the exhaust tail gas is not higher than the preset threshold value.
3. The system of claim 1, further comprising: an engine and a temperature acquisition module; the temperature acquisition module is specifically configured to:
acquiring the working condition temperature of the engine;
And determining the working condition temperature of the exhaust according to a preset mapping relation between the working condition temperature of the engine and the working condition temperature of the exhaust.
4. A system according to claim 3, further comprising: an engine self-checking module; the engine self-checking module is specifically used for:
When an engine starting instruction is received, performing equipment self-checking on the engine to obtain a self-checking result of the engine; the engine starting instruction is generated based on an external interactive terminal;
and if the self-checking result of the engine is a fault, generating a device alarm signal.
5. The system of claim 1, further comprising:
And the temperature monitoring module is used for inputting the mixed exhaust gas into the gas mixer when the working condition temperature of the mixed exhaust gas is lower than the preset threshold value.
6. An exhaust gas recirculation control method is characterized by being applied to an EGR system; the EGR system includes: the device comprises a tail gas input pipeline, a premixing pipeline, a control valve, a gas tank, a premixing control module and a gas mixer; one end of the premixing pipeline is connected with the gas tank through the control valve, and the other end of the premixing pipeline is connected with the tail gas input pipeline; the tail gas input pipeline is used for inputting the exhaust tail gas into the gas mixer; the premixing pipeline is used for conveying the ammonia gas from the gas tank to the tail gas input pipeline; the method comprises the following steps:
when the working condition temperature of the discharged tail gas is greater than a preset threshold value, establishing gas circulation between the tail gas input pipeline and the premixing pipeline through the control valve; when the tail gas input pipeline is communicated with the premixing pipeline, the discharged tail gas is mixed with the ammonia gas to form mixed discharged gas; the working condition temperature of the mixed exhaust gas is lower than the working condition temperature of the exhaust tail gas.
7. The method of claim 6, wherein the EGR system further comprises: a direct mixing pipeline; one end of the direct mixing pipeline is connected with the gas tank through the control valve, and the other end of the direct mixing pipeline is connected with the gas mixer; when the working condition temperature of the exhaust tail gas is greater than a preset threshold value, before the connection between the tail gas input pipeline and the premixing pipeline is established through the control valve, the method further comprises the following steps:
and when the working condition temperature of the exhaust tail gas is not higher than the preset threshold value, the direct mixing pipeline is connected with the gas mixer through the control valve.
8. The method of claim 6, wherein the EGR system further comprises: an engine; when the working condition temperature of the exhaust tail gas is greater than a preset threshold value, before the connection between the tail gas input pipeline and the premixing pipeline is established through the control valve, the method further comprises the following steps:
acquiring the working condition temperature of the engine;
And determining the working condition temperature of the exhaust according to a preset mapping relation between the working condition temperature of the engine and the working condition temperature of the exhaust.
9. An electronic device, the device comprising: a processor, memory, system bus;
the processor and the memory are connected through the system bus;
The memory is for storing one or more programs, the one or more programs comprising instructions, which when executed by the processor, cause the processor to perform the exhaust gas recirculation control method of any of claims 6-8.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the exhaust gas recirculation control method according to any one of claims 6 to 8.
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