CN116220870B - Control method and device for vehicle exhaust emission, electronic equipment and storage medium - Google Patents
Control method and device for vehicle exhaust emission, electronic equipment and storage medium Download PDFInfo
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- CN116220870B CN116220870B CN202310350633.4A CN202310350633A CN116220870B CN 116220870 B CN116220870 B CN 116220870B CN 202310350633 A CN202310350633 A CN 202310350633A CN 116220870 B CN116220870 B CN 116220870B
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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
- 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
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/005—Electrical control of exhaust gas treating apparatus using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
- F01N2610/144—Control thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
本发明公开一种车辆尾气排放的控制方法、装置、电子设备和存储介质，包括：获取发动机当前的转速和喷油量；基于转速和喷油量确定工况波动值；判断工况波动值是否大于预设工况波动值；在工况波动值大于预设工况波动值时，基于转速和喷油量确定发动机的NOx原排模型值；基于NOx原排模型值确定尿素喷射量；在工况波动值小于预设工况波动值时，获取NOx原排传感器检测的NOx原排检测值；基于NOx原排检测值确定尿素喷射量。本申请通过发动机当前的转速和喷油量可以确定当前的发动机工况波动程度，在工况波动值超过预设值时，表征当前发动机瞬间的NOx原排值较大，利用相应计算确定当前准确的NOx原排值，避免NOx原排传感器检测延迟导致排放超标。
The present invention discloses a control method, device, electronic device and storage medium for vehicle exhaust emission, including: obtaining the current engine speed and fuel injection amount; determining the operating condition fluctuation value based on the speed and fuel injection amount; judging whether the operating condition fluctuation value is greater than the preset operating condition fluctuation value; when the operating condition fluctuation value is greater than the preset operating condition fluctuation value, determining the engine's NOx original emission model value based on the speed and fuel injection amount; determining the urea injection amount based on the NOx original emission model value; when the operating condition fluctuation value is less than the preset operating condition fluctuation value, obtaining the NOx original emission detection value detected by the NOx original emission sensor; determining the urea injection amount based on the NOx original emission detection value. The present application can determine the current engine operating condition fluctuation degree through the current engine speed and fuel injection amount. When the operating condition fluctuation value exceeds the preset value, it indicates that the current engine instantaneous NOx original emission value is large. The current accurate NOx original emission value is determined by corresponding calculation to avoid excessive emissions caused by the NOx original emission sensor detection delay.
Description
Technical Field
The invention relates to the technical field of diesel engine tail gas purification, in particular to a control method and device for vehicle tail gas emission, electronic equipment and a storage medium.
Background
With the increasing demands of emission regulations, diesel engines have generally adopted SCR technology to treat exhaust gases to reduce emissions of pollutants NOx.
In the existing vehicle, the response time of the NOx sensor is about 2-5s, under the transient working condition of the engine, NOx measurement value is delayed, so that urea injection quantity is delayed, urea cannot react with NOx in exhaust gas timely, and under the condition of high catalyst temperature, ammonia storage capacity is reduced, and emission rise caused by untimely urea injection quantity is more obvious.
The time of the exhaust gas generated by the engine passing through the SCR system is basically less than 0.1s, the variation amplitude of the original NOx emission in a short time can reach more than 1000ppm, and the real-time accuracy of the original NOx emission detection has a great influence on the real-time accuracy of urea injection. Current NOx sensor technology requires a T90 response time of less than 3900ms. The test data analysis shows that the response time of the current NOx sensor is 2s-5s, the urea injection delay time is also 2-5s, and the time error of increasing or reducing the urea injection quantity is caused, so that the injected urea can not react with NOx in the waste gas in time, and the tail emission is higher.
Therefore, how to improve the accuracy and response speed of urea injection in the SCR system to reduce the exhaust emission of the vehicle is needed to be solved.
Disclosure of Invention
The method aims to solve the technical problem of how to improve the accuracy and the response speed of the urea injection quantity in the SCR system so as to reduce the exhaust emission of the vehicle. The invention provides a control method and device for vehicle exhaust emission, electronic equipment and a storage medium.
According to one aspect of the embodiment of the application, a control method for vehicle exhaust emission is provided, which comprises the steps of obtaining the current rotating speed and fuel injection quantity of an engine, determining a working condition fluctuation value based on the rotating speed and the fuel injection quantity, wherein the working condition fluctuation value represents the working condition fluctuation degree of the engine, judging whether the working condition fluctuation value is larger than a preset working condition fluctuation value, determining a NOx prime model value of the engine based on the rotating speed and the fuel injection quantity when the working condition fluctuation value is larger than the preset working condition fluctuation value, determining a urea injection quantity based on the NOx prime model value, obtaining a NOx prime detection value detected by a NOx sensor when the working condition fluctuation value is smaller than the preset working condition fluctuation value, and determining the urea injection quantity based on the NOx prime detection value.
Optionally, the method for determining the working condition fluctuation value based on the rotating speed and the oil injection quantity comprises the steps of obtaining a calibrated excess air coefficient of the engine, determining an actual excess air coefficient of the engine based on the rotating speed and the oil injection quantity, and determining the working condition fluctuation value based on the ratio of the calibrated excess air coefficient and the actual excess air coefficient.
Optionally, when the working condition fluctuation value is larger than a preset working condition fluctuation value, determining an NOx original emission model value of the engine based on the rotating speed and the oil injection quantity comprises determining an NOx original emission calibration value based on the rotating speed and the oil injection quantity, acquiring a first correction coefficient and a second correction coefficient, and determining the NOx original emission model value based on the first correction coefficient, the second correction coefficient and the NOx original calibration value.
Optionally, acquiring the first correction factor includes acquiring an intake air temperature value of the SCR system and determining the first correction factor based on the intake air temperature value.
Optionally, acquiring the second correction coefficient comprises acquiring the rotating speed of the engine and the operating condition fluctuation value, and determining the second correction coefficient based on the rotating speed and the operating condition fluctuation value.
Optionally, the determining the urea injection quantity based on the NOx emission detection value comprises controlling a urea pump to work based on the urea injection quantity.
According to another aspect of the embodiment of the application, a control device for vehicle exhaust emission is provided, which comprises an acquisition module for acquiring the current rotating speed and fuel injection quantity of an engine, a first analysis module for determining a working condition fluctuation value based on the rotating speed and the fuel injection quantity, a second analysis module for judging whether the working condition fluctuation value is larger than a preset working condition fluctuation value, a third analysis module for determining an NOx original emission model value of the engine based on the rotating speed and the fuel injection quantity when the working condition fluctuation value is larger than the preset working condition fluctuation value, a first execution module for determining a urea injection quantity based on the NOx original emission model value, a fourth analysis module for acquiring a NOx original emission detection value detected by a NOx original emission sensor when the working condition fluctuation value is smaller than the preset working condition fluctuation value, and a second execution module for determining the urea injection quantity based on the NOx original emission detection value.
Optionally, the control device for vehicle exhaust emission further comprises a third execution module for controlling the urea pump to work based on the urea injection quantity.
According to yet another aspect of the embodiments of the present application, there is also provided an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus, where the memory is configured to store a computer program, and the processor is configured to execute the method steps in any of the embodiments described above by running the computer program stored on the memory.
According to a further aspect of the embodiments of the present application there is also provided a computer readable storage medium having stored therein a computer program, wherein the computer program is arranged to perform the method steps of any of the embodiments described above when run.
According to the application, the current NOx original emission value is calibrated by using the rotating speed and the fuel injection quantity when the working condition of the engine is subjected to transient change, namely an accurate NOx original emission model value is finally determined, the accurate urea injection quantity is calculated by using the NOx original emission model value with higher precision after calibration, the reaction of urea and NOx compounds is increased, and the exceeding of the emission of vehicle tail gas is avoided; when the fluctuation value of the working condition is smaller than the preset fluctuation value, the working condition of the engine is represented as a steady state, the variation of the original NOx emission value is smaller, at the moment, even if the original NOx emission sensor has delay, the influence within a few seconds is smaller, meanwhile, when the engine is in the steady state, the variation fluctuation of the original NOx emission value is smaller, but the original NOx emission value can be instantaneously increased due to the external environment or other working condition factors, if the original NOx emission value at the moment is used as a reference for calculating the urea injection quantity, the urea injection quantity can be increased, and the reduction of the tail emission of a vehicle is not facilitated, so that when the working condition of the engine is in the steady state, the original NOx emission value applies the detection value of the original NOx emission sensor, namely the original NOx emission detection value, and the required urea injection quantity is determined based on the original NOx emission detection value, and tail gas treatment is carried out. Different NOx original emission value acquisition methods are applied when the engine is in different working conditions, so that the accuracy and response speed of the detection of the NOx original emission value under the transient and steady states of the engine working conditions are ensured, and the NOx tail emission of the engine is effectively reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention 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, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of an alternative vehicle exhaust emission control method according to an embodiment of the present application;
FIG. 2 is another flow chart of an alternative vehicle exhaust emission control method according to an embodiment of the present application;
FIG. 3 is a block diagram of an alternative vehicle exhaust emission control device according to an embodiment of the present application;
Fig. 4 is a block diagram of an alternative electronic device in accordance with an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which 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 present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As described in the background art, the time for the exhaust gas generated by the engine to pass through the SCR system is basically less than 0.1s, the variation amplitude of the original NOx emission in a short time can reach more than 1000ppm, and the real-time accuracy of the original NOx emission detection has a great influence on the real-time accuracy of urea injection. Current NOx sensor technology requires a T90 response time of less than 3900ms. The test data analysis shows that the response time of the current NOx sensor is 2s-5s, the urea injection delay time is also 2-5s, and the time error of increasing or reducing the urea injection quantity is caused, so that the injected urea can not react with NOx in the waste gas in time, and the tail emission is higher.
Thus, according to an aspect of an embodiment of the present application, there is provided a method for controlling exhaust emission of a vehicle, as shown in fig. 1 and 2, the flow of which may include the steps of:
S10, acquiring the current rotating speed and the fuel injection quantity of the engine.
S20, determining a working condition fluctuation value based on the rotating speed and the oil injection quantity, wherein the working condition fluctuation value represents the working condition fluctuation degree of the engine.
S30, judging whether the working condition fluctuation value is larger than a preset working condition fluctuation value.
S40, when the working condition fluctuation value is larger than the preset working condition fluctuation value, determining an NOx original emission model value of the engine based on the rotating speed and the oil injection quantity.
S50, determining the urea injection quantity based on the NOx original emission model value.
S60, acquiring an NOx original emission detection value detected by an NOx original emission sensor when the working condition fluctuation value is smaller than the preset working condition fluctuation value.
S70, determining the urea injection quantity based on the NOx original emission detection value.
In the embodiment, a working condition fluctuation value representing the fluctuation degree of the current working condition of the engine is determined through the current rotating speed and the fuel injection quantity of the engine, when the working condition fluctuation value is larger than a preset working condition fluctuation value, the working condition of the engine at the moment is represented to be transient, the original NOx emission value is instantaneously increased, and as the original NOx emission sensor is delayed in detection, when the working condition of the engine is transient, the current original NOx emission value, namely the original NOx emission model value, is calibrated through the rotating speed and the fuel injection quantity, and after the calibration, the accurate urea injection quantity is calculated through the original NOx emission model value with higher precision, so that the reaction of urea and NOx compounds is increased, and the exceeding of vehicle tail gas emission is avoided; when the fluctuation value of the working condition is smaller than the preset fluctuation value, the working condition of the engine is represented as a steady state, the variation of the original NOx emission value is smaller, at the moment, the original NOx emission sensor has delay, but the influence of the original NOx emission value is smaller within a few seconds, meanwhile, when the engine is in the steady state, the variation fluctuation of the original NOx emission value is smaller, but the original NOx emission value can be instantaneously increased due to the external environment or other working condition factors, if the original NOx emission value at the moment is used as a reference for calculating the urea injection quantity, the urea injection quantity can be increased, and the reduction of the tail emission of a vehicle is not facilitated, so that when the working condition of the engine is in the steady state, the original NOx emission value uses the detection value of the original NOx emission sensor, namely the original NOx emission detection value, the required urea injection quantity is determined based on the original NOx emission detection value, and tail gas treatment is carried out. Different NOx original emission value acquisition methods are applied when the engine is in different working conditions, so that the accuracy and response speed of the detection of the NOx original emission value under the transient and steady states of the engine working conditions are ensured, and the NOx tail emission of the engine is effectively reduced.
The preset working condition fluctuation value is configured as a critical value for switching the engine from a steady-state working condition to a transient working condition, and can be measured through a bench test.
As an exemplary embodiment, the determining the operating condition fluctuation value based on the rotational speed and the fuel injection amount includes obtaining a calibrated excess air ratio of the engine, determining an actual excess air ratio of the engine based on the rotational speed and the fuel injection amount, and determining the operating condition fluctuation value based on a ratio of the calibrated excess air ratio and the actual excess air ratio.
In this embodiment, the operating condition fluctuation value represents the operating condition fluctuation degree of the engine, when the bench test is performed, the calibrated excess air coefficient corresponding to the measurement of the rotation speed and the fuel injection quantity of the engine in a steady state can be obtained, when the actual test is performed, the actual excess air coefficient is determined according to the actual rotation speed and the actual fuel injection quantity of the current engine, the ratio of the calibrated excess air coefficient to the actual excess air coefficient is used as the operating condition fluctuation value, the deviation degree of the current operating condition of the engine and the operating condition of the engine in the steady state can be determined according to the magnitude of the ratio, and then the current operating condition of the engine is determined.
As an exemplary embodiment, when the operating condition fluctuation value is larger than a preset operating condition fluctuation value, determining a NOx emission model value of the engine based on the rotating speed and the oil injection quantity comprises determining a NOx emission calibration value based on the rotating speed and the oil injection quantity, acquiring a first correction coefficient and a second correction coefficient, and determining the NOx emission model value based on the first correction coefficient, the second correction coefficient and the NOx emission calibration value.
In this embodiment, when the NOx emission calibration value is determined based on the rotational speed and the fuel injection amount, since the intake air temperature and the air amount of the SCR system affect the ammonia storage value and further affect the reaction amount of the NOx compound, the NOx emission calibration value may be corrected based on parameters such as the intake air temperature of the SCR system, the engine rotational speed, the operating condition fluctuation value, and the like, that is, the NOx emission calibration value may be corrected by using the first correction coefficient and the second correction coefficient, so as to obtain an accurate current NOx emission value of the engine, that is, the NOx emission model value, and further improve the accuracy of NOx emission value detection.
As an exemplary embodiment, obtaining the first correction factor includes obtaining an intake air temperature value of the SCR system and determining the first correction factor based on the intake air temperature value. The obtaining of the second correction coefficient comprises the steps of obtaining the rotating speed of the engine and the working condition fluctuation value, and determining the second correction coefficient based on the rotating speed and the working condition fluctuation value.
In this embodiment, the first correction coefficient may be determined based on the intake air temperature value, and in bench experiments, the corresponding first correction coefficient is measured based on the intake air temperature values of different SCR systems to form a table of the intake air temperature value and the first correction coefficient, and the table is input into a control unit or ECU of the vehicle, and in actual detection, the vehicle may directly look up a table according to the current intake air temperature value to obtain the corresponding first correction coefficient, thereby reducing the calculation amount. Similarly, the second correction coefficient can be determined based on different engine speed and working condition fluctuation values during bench test, and the corresponding second correction coefficient can be determined by searching the MAP when the engine speed and the working condition fluctuation values are obtained in the MAP input value control unit or the ECU, so that the operation amount is reduced.
As an exemplary embodiment, the determining the urea injection amount based on the NOx emission detection value includes controlling urea pump operation based on the urea injection amount.
In this embodiment, after determining the corresponding NOx emission value based on the current engine operating condition and further determining the current required urea injection amount, the control unit or ECU of the vehicle controls the urea pump to perform corresponding injection based on the calculated urea injection amount, so as to complete catalysis of the NOx compounds and reduce tail emission of the vehicle.
According to another aspect of the embodiment of the present application, there is provided a control device for exhaust emission of a vehicle, as shown in fig. 3, including:
the acquisition module 301 acquires the current rotation speed and the fuel injection quantity of the engine;
a first analysis module 302 that determines a condition fluctuation value based on the rotational speed and the injection quantity;
the second analysis module 303 is used for judging whether the working condition fluctuation value is larger than a preset working condition fluctuation value;
the third analysis module 304 determines a NOx original emission model value of the engine based on the rotating speed and the fuel injection quantity when the working condition fluctuation value is larger than a preset working condition fluctuation value;
a first execution module 305 that determines a urea injection amount based on the NOx in-line model value;
a fourth analysis module 306, configured to obtain a NOx emission detection value detected by the NOx emission sensor when the operating condition fluctuation value is less than the preset operating condition fluctuation value;
The second execution module 307 determines the urea injection amount based on the NOx emission detection value.
It should be noted that, the acquiring module 301 in this embodiment may be used to perform the step S10, the first analyzing module 302 in this embodiment may be used to perform the step S20, the second analyzing module 303 in this embodiment may be used to perform the step S30, the third analyzing module 304 in this embodiment may be used to perform the step S40, the first performing module 305 in this embodiment may be used to perform the step S50, the fourth analyzing module 306 in this embodiment may be used to perform the step S60, and the second performing module 307 in this embodiment may be used to perform the step S70.
As an exemplary embodiment, the control device for vehicle exhaust emission further comprises a third execution module for controlling the urea pump to work based on the urea injection quantity.
According to still another aspect of the embodiment of the present application, there is provided an electronic device including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus, and the memory is configured to store a computer program, and the processor is configured to execute the method for controlling exhaust emissions of a vehicle according to any one of the above embodiments by running the computer program stored on the memory.
Fig. 4 is a block diagram of an alternative electronic device, according to an embodiment of the application, as shown in fig. 4, including a processor 402, a communication interface 404, a memory 406, and a communication bus 408, wherein the processor 402, the communication interface 404, and the memory 406 communicate with each other via the communication bus 408, wherein,
A memory 406 for storing a computer program;
processor 402, when executing a computer program stored on memory 406, performs the following steps:
acquiring the current rotating speed and oil injection quantity of an engine;
determining a working condition fluctuation value based on the rotating speed and the oil injection quantity, wherein the working condition fluctuation value represents the working condition fluctuation degree of the engine;
Judging whether the working condition fluctuation value is larger than a preset working condition fluctuation value or not;
When the working condition fluctuation value is larger than the preset working condition fluctuation value, determining an original NOx emission model value of the engine based on the rotating speed and the oil injection quantity;
determining a urea injection quantity based on the NOx emission model value;
when the working condition fluctuation value is smaller than the preset working condition fluctuation value, acquiring a NOx original emission detection value detected by a NOx original emission sensor;
and determining the urea injection quantity based on the NOx emission detection value.
Alternatively, in the present embodiment, the above-described communication bus may be a PCI (PERIPHERAL COMPONENT INTERCONNECT, peripheral component interconnect standard) bus, or an EISA (Extended Industry Standard Architecture ) bus, or the like. The communication bus may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, only one thick line is shown in fig. 4, but not only one bus or one type of bus.
The communication interface is used for communication between the electronic device and other devices.
The memory may include RAM or may include non-volatile memory (non-volatile memory), such as at least one disk memory. Optionally, the memory may also be at least one memory device located remotely from the aforementioned processor.
According to a further aspect of the embodiments of the present application, there is provided a computer-readable storage medium having stored therein a computer program, wherein the computer program is configured to execute the method for controlling exhaust emissions of a vehicle according to any one of the embodiments described above when run.
Alternatively, in the present embodiment, the storage medium is configured to store program code for performing the steps of:
acquiring the current rotating speed and oil injection quantity of an engine;
determining a working condition fluctuation value based on the rotating speed and the oil injection quantity, wherein the working condition fluctuation value represents the working condition fluctuation degree of the engine;
Judging whether the working condition fluctuation value is larger than a preset working condition fluctuation value or not;
When the working condition fluctuation value is larger than the preset working condition fluctuation value, determining an original NOx emission model value of the engine based on the rotating speed and the oil injection quantity;
determining a urea injection quantity based on the NOx emission model value;
when the working condition fluctuation value is smaller than the preset working condition fluctuation value, acquiring a NOx original emission detection value detected by a NOx original emission sensor;
and determining the urea injection quantity based on the NOx emission detection value.
Alternatively, specific examples in the present embodiment may refer to examples described in the above embodiments, which are not described in detail in the present embodiment.
Alternatively, in the present embodiment, the storage medium may include, but is not limited to, a USB flash disk, a ROM, a RAM, a removable hard disk, a magnetic disk, or an optical disk, etc., which may store the program code.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present application.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
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| CN117418924B (en) * | 2023-12-18 | 2024-04-16 | 潍柴动力股份有限公司 | Transient NO x Original row correction method and device, electronic equipment and storage medium |
| CN117949225B (en) * | 2024-03-26 | 2024-06-11 | 长春汽车工业高等专科学校 | Automobile emission detection method and system |
Citations (2)
| 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 |
| CN108150300A (en) * | 2017-12-21 | 2018-06-12 | 潍柴动力股份有限公司 | A kind of modification method and device of Diesel NOx original row model value |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4509171B2 (en) * | 2007-11-22 | 2010-07-21 | 株式会社デンソー | Injection amount control device for internal combustion engine |
| DE102015201177B4 (en) * | 2014-01-23 | 2016-01-28 | Honda Motor Co., Ltd. | Emission control system for an internal combustion engine |
| WO2021163863A1 (en) * | 2020-02-18 | 2021-08-26 | 潍柴动力股份有限公司 | Engine control method and device |
| CN113266448B (en) * | 2021-05-27 | 2022-04-26 | 潍柴动力股份有限公司 | Control method and system for urea injection amount and vehicle |
| CN114233504B (en) * | 2021-12-13 | 2023-11-17 | 潍柴动力股份有限公司 | NO (NO) x Emission control method and device |
| CN115238651A (en) * | 2022-07-07 | 2022-10-25 | 广西玉柴机器股份有限公司 | A method for analyzing NOX emission value from ECU data |
-
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Patent Citations (2)
| 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 |
| CN108150300A (en) * | 2017-12-21 | 2018-06-12 | 潍柴动力股份有限公司 | A kind of modification method and device of Diesel NOx original row model value |
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