Method, apparatus, and medium for monitoring nitrogen oxide conversion efficiency

Abstract

The application discloses a method and device for monitoring nitrogen oxide conversion efficiency, electronic equipment and storage medium, which are applied to the electronic equipment of an engine, and specifically judge whether the current working condition of a double-injection SCR system meets preset monitoring requirements; when the condition is met, the real-time conversion efficiency of the double-injection SCR system is calculated, that is, the first conversion efficiency of a first-stage SCR tank and the second conversion efficiency of a second-stage SCR tank are calculated; when the real-time conversion efficiency is lower than a preset minimum conversion efficiency, an individual-efficiency-out-of-standard alarm information is sent out; when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency, a comprehensive-efficiency-out-of-standard alarm information is output according to a preset standard-efficiency corresponding to the first conversion efficiency and the second conversion efficiency. After a user receives the corresponding alarm information, timely disposal measures can be taken, so that engine over-standard emission can be avoided.

Description

Technical Field

[0001] This application relates to the field of engine technology, and more specifically, to a method, apparatus, electronic device, and medium for monitoring nitrogen oxide conversion efficiency. Background Technology

[0002] SCR (Selective Catalytic Reduction) technology is an exhaust gas treatment method used to treat nitrogen oxides in engine exhaust. It works by injecting ammonia or urea solution into the engine exhaust, reducing nitrogen oxides into nitrogen and water, thereby reducing air pollution. A dual-injection SCR system includes two SCR chambers, each equipped with independently controlled nozzles that inject ammonia or urea solution into the two chambers respectively, achieving higher conversion efficiency for nitrogen oxides.

[0003] To ensure engine exhaust emissions meet standards, the nitrogen oxide conversion efficiency of the dual-injection SCR system needs to be monitored to trigger timely alarms when conversion requirements are not met, allowing users to intervene or take appropriate action. Current dual-injection SCR systems monitor the conversion efficiency of each SCR chamber individually, triggering an alarm when the efficiency of any one SCR chamber drops to a lower limit. However, the final environmental impact depends on the overall conversion efficiency of the entire dual-injection SCR system. Even when both SCR chambers meet the conversion efficiency standards, the overall efficiency may not, and the system may not issue an alarm in time, preventing timely user intervention and ultimately leading to non-compliance with engine exhaust emissions standards. Summary of the Invention

[0004] In view of this, this application provides a method, apparatus, electronic device and medium for monitoring nitrogen oxide conversion efficiency, used to monitor the nitrogen oxide conversion efficiency of a dual-injection SCR system, and to promptly alarm when the conversion efficiency fails to meet the standard, so as to avoid excessive emissions from the engine.

[0005] To achieve the above objectives, the following solution is proposed:

[0006] A method for monitoring nitrogen oxide conversion efficiency, applied to the electronic equipment of an engine, is used to monitor the conversion efficiency of the engine's dual-injection SCR system. The dual-injection SCR system includes a first-stage SCR chamber and a second-stage SCR chamber. The monitoring method includes the following steps:

[0007] Determine whether the current operating condition of the dual-injection SCR system meets the preset monitoring requirements;

[0008] When the current operating condition meets the preset monitoring requirements, the real-time conversion efficiency of the dual-injection SCR system is calculated. The real-time conversion efficiency includes the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box.

[0009] When the real-time conversion efficiency is lower than the preset minimum conversion efficiency, a separate efficiency failure alarm message is issued.

[0010] When the real-time conversion efficiency is not lower than the preset minimum conversion efficiency, an alarm message indicating that the overall efficiency is not up to standard is output based on the preset target efficiency corresponding to the first conversion efficiency and the second conversion efficiency.

[0011] Optionally, determining whether the current operating condition of the dual-injection SCR system meets the preset monitoring requirements includes the following steps:

[0012] Determine whether the current working condition meets the preset working condition; if it does, then determine that the current working condition meets the preset monitoring requirements.

[0013] When a monitoring instruction is received, it is determined that the current operating condition meets the preset monitoring requirements.

[0014] Optionally, the preset minimum conversion efficiency includes a first minimum conversion efficiency matched with the first-stage SCR box and a second minimum conversion efficiency matched with the second-stage SCR box. The step of issuing a separate efficiency failure alarm when the real-time conversion efficiency is lower than the preset minimum conversion efficiency includes the following steps:

[0015] Determine whether the first conversion efficiency is lower than the first minimum conversion efficiency; if it is lower than the first minimum conversion efficiency, issue the first SCR fault information.

[0016] Determine whether the second conversion efficiency is lower than the second minimum conversion efficiency. If it is lower than the second minimum conversion efficiency, issue a second SCR fault message.

[0017] Optionally, the step of outputting a comprehensive efficiency failure alarm based on the preset target efficiency corresponding to the first conversion efficiency and the second conversion efficiency includes the following steps:

[0018] When the real-time conversion efficiency is higher than the preset minimum conversion efficiency, the preset target efficiency is determined based on the first conversion efficiency.

[0019] When the second conversion efficiency is lower than the preset target efficiency, an alarm message indicating that the overall efficiency does not meet the target is issued.

[0020] A nitrogen oxide conversion efficiency monitoring device is applied to the electronic equipment of an engine for monitoring the conversion efficiency of the engine's dual-injection SCR system. The dual-injection SCR system includes a first-stage SCR chamber and a second-stage SCR chamber. The monitoring device includes:

[0021] The operating condition judgment module is configured to determine whether the current operating condition of the dual-injection SCR system meets the preset monitoring requirements;

[0022] The efficiency calculation module is configured to calculate the real-time conversion efficiency of the dual-injection SCR system when the current operating condition meets the preset monitoring requirements. The real-time conversion efficiency includes the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box.

[0023] The first alarm module is configured to issue a separate efficiency failure alarm message when the real-time conversion efficiency is lower than the preset minimum conversion efficiency.

[0024] The second alarm module is configured to output a comprehensive efficiency failure alarm message based on the preset target efficiency corresponding to the first conversion efficiency and the second conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency.

[0025] Optionally, the working condition judgment module includes:

[0026] The first judgment unit is configured to judge whether the current working condition meets the preset working condition. If it does, the current working condition is determined to meet the preset monitoring requirements.

[0027] The second judgment unit is configured to determine, when a monitoring instruction is received, that the current working condition meets the preset monitoring requirements.

[0028] Optionally, the preset minimum conversion efficiency includes a first minimum conversion efficiency matched with the first-stage SCR box and a second minimum conversion efficiency matched with the second-stage SCR box, and the first alarm module includes:

[0029] The first alarm unit is configured to determine whether the first conversion efficiency is lower than the first minimum conversion efficiency, and when it is lower than the first minimum conversion efficiency, to issue a first SCR fault message.

[0030] The second alarm unit is configured to determine whether the second conversion efficiency is lower than the second minimum conversion efficiency, and when it is lower than the second minimum conversion efficiency, issue a second SCR fault message.

[0031] Optionally, the second alarm module includes:

[0032] An efficiency determination unit is configured to determine a preset target efficiency based on the first conversion efficiency when the real-time conversion efficiency is higher than the preset minimum conversion efficiency.

[0033] The integrated alarm unit is configured to issue an integrated efficiency failure alarm message when the second conversion efficiency is lower than the preset target efficiency. The first conversion efficiency is calculated according to a preset algorithm to obtain the preset target efficiency.

[0034] An electronic device, applied to an engine, the electronic device comprising at least one processor and a memory connected to the processor, wherein:

[0035] The memory is used to store computer programs or instructions;

[0036] The processor is used to execute the computer program or instructions to enable the electronic device to implement the nitrogen oxide conversion efficiency monitoring method as described above.

[0037] A storage medium for use in an electronic device, the storage medium carrying one or more computer programs that can be executed by the electronic device to enable the electronic device to implement the nitrogen oxide conversion efficiency monitoring method as described above.

[0038] As can be seen from the above technical solution, this application discloses a method, device, electronic equipment, and storage medium for monitoring nitrogen oxide conversion efficiency. This method and device are applied to the electronic equipment of an engine, specifically determining whether the current operating condition of the dual-injection SCR system meets preset monitoring requirements; when it does, calculating the real-time conversion efficiency of the dual-injection SCR system, i.e., calculating the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box; when the real-time conversion efficiency is lower than a preset minimum conversion efficiency, issuing a separate efficiency failure alarm message; when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency, outputting a comprehensive efficiency failure alarm message based on the preset acceptable efficiency and the second conversion efficiency corresponding to the first conversion efficiency. When the user receives the corresponding alarm message, they can take timely measures to prevent the engine from exceeding emission standards. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1This is a flowchart illustrating a method for monitoring nitrogen oxide conversion efficiency according to an embodiment of this application;

[0041] Figure 2 This is a block diagram of a nitrogen oxide conversion efficiency monitoring device according to an embodiment of this application;

[0042] Figure 3 This is a block diagram of a nitrogen oxide conversion efficiency monitoring device according to an embodiment of this application;

[0043] Figure 4 This is a block diagram of an electronic device according to an embodiment of this application. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0045] Example 1

[0046] Figure 1 This is a flowchart illustrating a method for monitoring nitrogen oxide conversion efficiency according to an embodiment of this application.

[0047] like Figure 1 As shown, the monitoring method provided in this embodiment is applied to the engine's electronic equipment to monitor the conversion efficiency of the engine's dual-injection SCR system and to provide timely alarms in case of faults. This electronic equipment can be understood as the engine's controller, such as an ECU or MCU. The dual-injection SCR system in this embodiment includes a first-stage SCR box and a second-stage SCR box, which are connected in series. The monitoring method specifically includes the following steps:

[0048] S1. Determine whether the current operating conditions of the dual-injection SCR system meet the preset monitoring requirements.

[0049] Because the flow rate and temperature of any engine's SCR system may not be at normal levels for a period of time after startup, each stage of the SCR system operates independently. Monitoring the nitrogen oxide conversion efficiency is only necessary when two stages of SCR operate in a coordinated mode, i.e., when the main and auxiliary SCRs work together. Therefore, it is necessary to determine the current operating conditions. The determination method is as follows:

[0050] One approach is to assess various specific parameters of the current operating condition to determine whether the two-stage SCR boxes are working in tandem. If so, the current operating condition is deemed to meet the preset monitoring requirements.

[0051] Another approach is to determine whether a corresponding control command has been received. If a monitoring command is received, the current operating condition is considered to meet the preset monitoring requirements in order to satisfy the needs of the user or the engine.

[0052] S2. Calculate the real-time conversion efficiency of the dual-injection SCR system.

[0053] When the current operating conditions meet the preset monitoring requirements, various parameters are acquired from the engine, and the real-time conversion efficiency of the dual-injection SCR system is calculated based on a preset algorithm. Specifically, the calculation process involves performing integration based on an enable request and certain boundary conditions to obtain the real-time conversion efficiency. Given that the system includes a two-stage SCR system, this conversion efficiency includes a first conversion efficiency corresponding to the first-stage SCR chamber and a second conversion efficiency corresponding to the second-stage SCR chamber.

[0054] S3. Issue a separate alarm message for substandard efficiency when the real-time conversion efficiency fails to meet the standard.

[0055] When either the first or second conversion efficiency in the real-time conversion efficiency is lower than the corresponding preset minimum conversion efficiency, a separate efficiency failure alarm is issued. This indicates that the conversion efficiency of the first-stage SCR box or the second-stage SCR box is below the standard, or that the conversion efficiency of both SCR stages is below the standard. The preset minimum conversion efficiency includes the first minimum conversion rate corresponding to the first-stage SCR box shown in Table 1a, and the second minimum conversion rate corresponding to the second-stage SCR box shown in Table 2a. This includes the conversion efficiency corresponding to the exhaust gas flow rate and temperature in the corresponding SCR, and the unit is percentage.

[0056]

[0057] Table 1a

[0058]

[0059] Table 2a

[0060] The individual efficiency failure alarm includes both first-stage SCR fault information reflecting the first-stage SCR unit's conversion efficiency failure and second-stage SCR fault information reflecting the second-stage SCR unit's conversion efficiency failure. The specific methods used in this step are as follows:

[0061] First, determine whether the first conversion efficiency is lower than the first minimum conversion efficiency. When the first conversion efficiency is lower than the first minimum conversion efficiency, issue the first SCR fault information to indicate that the conversion efficiency of the first-stage SCR box is not up to standard.

[0062] Then, or simultaneously, it is determined whether the second conversion efficiency is lower than the second minimum conversion efficiency. When the second conversion efficiency is lower than the second minimum conversion efficiency, a second SCR fault message is issued to indicate that the conversion efficiency of the second-stage SCR box is not up to standard.

[0063] S4. When the overall conversion efficiency does not meet the standard, output an alarm message indicating that the overall efficiency does not meet the standard.

[0064] In other words, when the conversion efficiencies of both stages of SCR exceed their respective minimum conversion efficiencies, the overall conversion efficiency is calculated based on the first and second conversion efficiencies to determine whether it meets the target. Specifically, this is achieved through the following steps:

[0065] First, a corresponding preset target efficiency is determined based on the first conversion efficiency. This preset target efficiency is used to assess the second conversion efficiency of the second-stage SCR box. Multiple MAP tables can be preset, including Table 1b, Table 1c, and Table 1d:

[0066]

[0067] Table 1b

[0068]

[0069] Table 1c

[0070]

[0071] Table 1d

[0072] Determine which MAP table the first conversion efficiency belongs to. For example, if the first conversion efficiency is 0.5 when the temperature is 200℃ and the exhaust gas flow rate is 500 kg / h, then the first conversion efficiency belongs to Table 1c. In this case, Table 1c points to Table 2c in the following table. Tables 2b, 2c, and 2d are MAP tables that contain the preset target efficiency, as shown below:

[0073]

[0074] Table 2b

[0075]

[0076] Table 2c

[0077]

[0078] Table 2d

[0079] As can be seen from Table 2c, the corresponding preset achievement efficiency should be 0.8, or 80%.

[0080] Then, it is determined whether the second conversion efficiency is lower than the preset target efficiency. If it is lower than the preset target efficiency, it is determined that the overall nitrogen oxide conversion efficiency of the system is not up to standard, and an alarm message for the overall efficiency not up to standard is issued.

[0081] As can be seen from the above technical solution, this embodiment provides a method for monitoring nitrogen oxide conversion efficiency. This method is applied to the electronic equipment of an engine, specifically determining whether the current operating condition of the dual-injection SCR system meets preset monitoring requirements; when it does, calculating the real-time conversion efficiency of the dual-injection SCR system, i.e., calculating the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box; when the real-time conversion efficiency is lower than a preset minimum conversion efficiency, issuing a separate efficiency failure alarm message; when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency, outputting a comprehensive efficiency failure alarm message based on the preset acceptable efficiency and the second conversion efficiency corresponding to the first conversion efficiency. When the user receives the corresponding alarm message, they can take timely measures to prevent the engine from exceeding emission standards.

[0082] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0083] Although the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. In certain environments, multitasking and parallel processing may be advantageous.

[0084] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0085] Computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination thereof, including but not limited to object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer.

[0086] Example 2

[0087] Figure 2 This is a block diagram of a nitrogen oxide conversion efficiency monitoring device according to an embodiment of this application.

[0088] like Figure 2 As shown, the monitoring device provided in this embodiment is applied to the engine's electronic equipment to monitor the conversion efficiency of the engine's dual-injection SCR system and to provide timely alarms in case of faults. This electronic equipment can be understood as the engine's controller, such as an ECU or MCU. The dual-injection SCR system in this embodiment includes a first-stage SCR box and a second-stage SCR box, which are connected in series. Specifically, the monitoring device includes a condition judgment module 10, an efficiency calculation module 20, a first alarm module 30, and a second alarm module.

[0089] The operating condition judgment module is used to determine whether the current operating condition of the dual-injection SCR system meets the preset monitoring requirements.

[0090] Because the flow rate and temperature of any engine's SCR system may not be at normal levels for a period of time after it starts operating, each stage of the SCR system operates independently. Monitoring the nitrogen oxide conversion efficiency is only necessary when two stages of SCR operate in a collaborative mode, i.e., when the main and auxiliary SCRs work together, distinguishing between them. Therefore, it is necessary to determine the current operating condition; this module includes a first determination unit and a second determination unit.

[0091] The first judgment unit is used to judge various specific parameters of the current working condition and determine whether the two-level SCR is working in coordination. If so, the current working condition is determined to meet the preset monitoring requirements.

[0092] The second judgment unit is used to determine whether the corresponding control command has been received. That is, if the monitoring command is received, the current working condition is also considered to meet the preset monitoring requirements in order to meet the needs of the user or the engine.

[0093] The efficiency calculation module is used to calculate the real-time conversion efficiency of the dual-injection SCR system.

[0094] When the current operating conditions meet the preset monitoring requirements, various parameters are acquired from the engine, and the real-time conversion efficiency of the dual-injection SCR system is calculated based on a preset algorithm. Specifically, the calculation process involves performing integration based on an enable request and certain boundary conditions to obtain the real-time conversion efficiency. Given that the system includes a two-stage SCR system, this conversion efficiency includes a first conversion efficiency corresponding to the first-stage SCR chamber and a second conversion efficiency corresponding to the second-stage SCR chamber.

[0095] The first alarm module is used to issue a separate alarm message when the real-time conversion efficiency fails to meet the standard.

[0096] When either the first or second conversion efficiency in the real-time conversion efficiency is lower than the corresponding preset minimum conversion efficiency, a separate efficiency failure alarm is issued. This indicates that the conversion efficiency of the first-stage SCR box or the second-stage SCR box is below the standard, or that the conversion efficiency of both SCR stages is below the standard. The preset minimum conversion efficiency includes the first minimum conversion rate corresponding to the first-stage SCR box shown in Table 1a, and the second minimum conversion rate corresponding to the second-stage SCR box shown in Table 2a. This includes the conversion efficiency corresponding to the exhaust gas flow rate and temperature in the corresponding SCR, and the unit is percentage.

[0097] The individual efficiency failure alarm includes first SCR fault information reflecting the first-stage SCR box's conversion efficiency failure, and second SCR fault information reflecting the second-stage SCR box's conversion efficiency failure. This module includes a first alarm unit 31 and a second alarm unit 32, such as... Figure 3 As shown.

[0098] The first alarm unit is used to determine whether the first conversion efficiency is lower than the first minimum conversion efficiency. When the first conversion efficiency is lower than the first minimum conversion efficiency, the first SCR fault information is issued to indicate that the conversion efficiency of the first-stage SCR box is not up to standard.

[0099] The second alarm unit is used to determine whether the second conversion efficiency is lower than the second minimum conversion efficiency. When the second conversion efficiency is lower than the second minimum conversion efficiency, a second SCR fault message is issued to indicate that the conversion efficiency of the second-stage SCR box is not up to standard.

[0100] The second alarm module is used to output an alarm message indicating that the overall efficiency is below standard when the overall conversion efficiency is below standard.

[0101] When the conversion efficiencies of both stages of SCR exceed their corresponding minimum conversion efficiencies, the overall conversion efficiency is calculated based on the first and second conversion efficiencies to determine whether it meets the standard. This module includes an efficiency determination unit 41 and an overall alarm unit 42.

[0102] The efficiency determination unit is used to determine a corresponding preset target efficiency based on the first conversion efficiency. This preset target efficiency is used to assess the second conversion efficiency of the second-stage SCR box.

[0103] The integrated alarm unit is used to determine whether the second conversion efficiency is lower than the preset target efficiency. If it is lower than the preset target efficiency, it is determined that the overall conversion efficiency of nitrogen oxides in the system is not up to standard, and an alarm message indicating that the overall efficiency is not up to standard is issued.

[0104] As can be seen from the above technical solution, this embodiment provides a monitoring device for nitrogen oxide conversion efficiency. This device is applied to the electronic equipment of an engine, specifically determining whether the current operating condition of the dual-injection SCR system meets preset monitoring requirements; when it does, it calculates the real-time conversion efficiency of the dual-injection SCR system, that is, calculating the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box; when the real-time conversion efficiency is lower than the preset minimum conversion efficiency, it issues a separate efficiency failure alarm message; when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency, it outputs a comprehensive efficiency failure alarm message based on the preset compliance efficiency and the second conversion efficiency corresponding to the first conversion efficiency. When the user receives the corresponding alarm message, they can take timely measures to avoid excessive engine emissions.

[0105] The units described in the embodiments of this disclosure can be implemented in software or in hardware. The name of a unit does not necessarily limit the unit itself; for example, the first acquisition unit can also be described as "a unit that acquires at least two Internet Protocol addresses".

[0106] The functions described above in this document can be performed at least in part by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), system-on-a-chip (SoCs), complex programmable logic devices (CPLDs), and so on.

[0107] Example 3

[0108] Figure 4 This is a block diagram of an electronic device according to an embodiment of this application.

[0109] refer to Figure 4The diagram illustrates a structural schematic suitable for implementing the electronic device in the embodiments of this disclosure. The terminal device in the embodiments of this disclosure may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. This electronic device is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this disclosure.

[0110] The electronic device may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 401, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 404 or a program loaded from an input device 406 into a random access memory (RAM) 403. The RAM also stores various programs and data required for the operation of the electronic device. The processing unit, ROM, and RAM are interconnected via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0111] Typically, the following devices can be connected to the I / O interface: input devices including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 407 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 408 including, for example, magnetic tapes, hard disks, etc.; and communication devices 409. Communication device 409 allows the electronic device to communicate wirelessly or wiredly with other devices to exchange data. Although electronic devices with various devices are shown in the figures, it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed alternatively.

[0112] Example 4

[0113] This embodiment provides a computer-readable storage medium carrying one or more computer programs. When these programs are executed by an electronic device, the device determines whether the current operating condition of the dual-injection SCR system meets preset monitoring requirements. If it does, the device calculates the real-time conversion efficiency of the dual-injection SCR system, specifically the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box. If the real-time conversion efficiency is lower than a preset minimum conversion efficiency, a separate efficiency failure alarm is issued. If the real-time conversion efficiency is not lower than the preset minimum conversion efficiency, a comprehensive efficiency failure alarm is output based on the preset acceptable efficiency corresponding to the first conversion efficiency and the second conversion efficiency. Upon receiving the corresponding alarm, the user can take timely action to prevent excessive engine emissions.

[0114] It should be noted that the computer-readable medium described in this disclosure can be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this disclosure, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this disclosure, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0115] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0116] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0117] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0118] The technical solution provided by the present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for monitoring nitrogen oxide conversion efficiency, applied to the electronic equipment of an engine, for monitoring the conversion efficiency of the engine's dual-injection SCR system, the dual-injection SCR system comprising a first-stage SCR chamber and a second-stage SCR chamber, characterized in that, The monitoring method includes the following steps: Determine whether the current operating condition of the dual-injection SCR system meets the preset monitoring requirements; When the current operating condition meets the preset monitoring requirements, the real-time conversion efficiency of the dual-injection SCR system is calculated. The real-time conversion efficiency includes the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box. When the real-time conversion efficiency is lower than the preset minimum conversion efficiency, a separate efficiency failure alarm message is issued. When the real-time conversion efficiency is not lower than the preset minimum conversion efficiency, a preset target efficiency corresponding to the first conversion efficiency is determined based on the first conversion efficiency; when the second conversion efficiency is lower than the preset target efficiency, an alarm message for overall efficiency failure is issued.

2. The monitoring method as described in claim 1, characterized in that, The step of determining whether the current operating condition of the dual-injection SCR system meets the preset monitoring requirements includes the following steps: Determine whether the current working condition meets the preset working condition; if it does, then determine that the current working condition meets the preset monitoring requirements. When a monitoring instruction is received, it is determined that the current operating condition meets the preset monitoring requirements.

3. The monitoring method as described in claim 1, characterized in that, The preset minimum conversion efficiency includes a first minimum conversion efficiency matched with the first-stage SCR box and a second minimum conversion efficiency matched with the second-stage SCR box. The step of issuing a separate efficiency failure alarm when the real-time conversion efficiency is lower than the preset minimum conversion efficiency includes the following steps: Determine whether the first conversion efficiency is lower than the first minimum conversion efficiency; if it is lower than the first minimum conversion efficiency, issue the first SCR fault information. Determine whether the second conversion efficiency is lower than the second minimum conversion efficiency. If it is lower than the second minimum conversion efficiency, issue a second SCR fault message.

4. A monitoring device for nitrogen oxide conversion efficiency, applied to the electronic equipment of an engine, for monitoring the conversion efficiency of the engine's dual-injection SCR system, the dual-injection SCR system comprising a first-stage SCR chamber and a second-stage SCR chamber, characterized in that, The monitoring device includes: The operating condition judgment module is configured to determine whether the current operating condition of the dual-injection SCR system meets the preset monitoring requirements; The efficiency calculation module is configured to calculate the real-time conversion efficiency of the dual-injection SCR system when the current operating condition meets the preset monitoring requirements. The real-time conversion efficiency includes the first conversion efficiency of the first-stage SCR box and the second conversion efficiency of the second-stage SCR box. The first alarm module is configured to issue a separate efficiency failure alarm message when the real-time conversion efficiency is lower than the preset minimum conversion efficiency. The second alarm module is configured to output a comprehensive efficiency failure alarm message based on the preset target efficiency corresponding to the first conversion efficiency and the second conversion efficiency when the real-time conversion efficiency is not lower than the preset minimum conversion efficiency. The second alarm module includes: An efficiency determination unit is configured to determine a preset target efficiency based on the first conversion efficiency when the real-time conversion efficiency is higher than the preset minimum conversion efficiency. The integrated alarm unit is configured to issue an integrated efficiency failure alarm message when the second conversion efficiency is lower than the preset target efficiency.

5. The monitoring device as described in claim 4, characterized in that, The operating condition judgment module includes: The first judgment unit is configured to judge whether the current working condition meets the preset working condition. If it does, the current working condition is determined to meet the preset monitoring requirements. The second judgment unit is configured to determine, when a monitoring instruction is received, that the current working condition meets the preset monitoring requirements.

6. The monitoring device as described in claim 4, characterized in that, The preset minimum conversion efficiency includes a first minimum conversion efficiency matched with the first-stage SCR box and a second minimum conversion efficiency matched with the second-stage SCR box. The first alarm module includes: The first alarm unit is configured to determine whether the first conversion efficiency is lower than the first minimum conversion efficiency, and when it is lower than the first minimum conversion efficiency, to issue a first SCR fault message. The second alarm unit is configured to determine whether the second conversion efficiency is lower than the second minimum conversion efficiency, and when it is lower than the second minimum conversion efficiency, issue a second SCR fault message.

7. An electronic device applied to an engine, characterized in that, The electronic device includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs or instructions; The processor is used to execute the computer program or instructions to enable the electronic device to implement the method for monitoring nitrogen oxide conversion efficiency as described in any one of claims 1 to 3.

8. A storage medium used in electronic devices, characterized in that, The storage medium carries one or more computer programs that can be executed by the electronic device to enable the electronic device to implement the method for monitoring nitrogen oxide conversion efficiency as described in any one of claims 1 to 3.

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