Diesel vehicle urea consumption diagnostic method, device, equipment and program product

Abstract

The invention relates to a diesel vehicle urea consumption diagnosis method, device and equipment and a program product. The method comprises the steps that urea box liquid level data and accumulated fuel consumption data of a vehicle within preset time are acquired; smooth filtering processing is conducted on the urea box liquid level data, the urea-fuel ratio within the preset time is calculated based on the processed urea box liquid level data and the accumulated fuel consumption data, and whether a time interval with the urea box liquid level data larger than the preset liquid level and the duration larger than the preset duration exists or not is recognized; if the time interval in which the liquid level of the urea box is greater than the preset liquid level and the duration is greater than the preset duration does not exist, judging whether the time proportion in which the urine-fuel ratio is greater than a preset urine-fuel ratio threshold value within the preset time is greater than a preset proportion or not; if yes, the urea consumption in the preset time is judged to be normal, and otherwise, the urea consumption in the preset time is judged to be abnormal.

Description

Technical Field

[0001] The present application relates to the technical field of motor vehicle emission control, and in particular to a method, device, equipment and program product for diagnosing urea consumption of a diesel vehicle. Background Art

[0002] Diesel vehicles are the main contributors to automobile nitrogen oxide (NOx) emissions. Effectively controlling and managing their emissions is of great significance to winning the battle against mobile source pollution. Selective catalytic reduction (SCR) technology is the main common technology for controlling NOx emissions from engines. Its principle is: urea solution is injected into the engine exhaust. Under the action of high-temperature exhaust gas, the urea solution is rapidly hydrolyzed to produce ammonia. Under the action of the SCR catalyst, ammonia and nitrogen oxides undergo redox reactions to generate harmless substances such as nitrogen and water, which are then discharged into the atmosphere, thereby reducing the emission of nitrogen oxides from diesel engines.

[0003] Since the SCR system needs to consume urea solution to effectively play a catalytic conversion role, and the consumption of urea solution will increase the cost of using the vehicle, there are some cheating methods in the vehicle market to reduce or cut off the consumption of urea solution, aiming to reduce operating costs. However, when the urea consumption is too little, there is a risk of exceeding the NOx standard in diesel engine exhaust. Therefore, real-time and accurate monitoring of urea consumption to ensure that it is maintained at a normal level is the key to ensuring effective control of NOx emissions from diesel vehicles.

[0004] To solve the above problems, some new technologies have gradually been applied. One of the related technologies is to obtain key parameters such as the real-time urea injection volume, urea tank level and fuel consumption rate from the remote monitoring platform, and analyze the cumulative fuel consumption over a period of time or the relative relationship between the cumulative engine power and the cumulative urea consumption to confirm the rationality of the urea consumption. However, this method also has its shortcomings. It relies on the urea injection volume data provided by the vehicle terminal, and the National VI emission standard requires that the data collected by the vehicle terminal does not include the urea injection volume. In addition, most vehicle manufacturers regard the urea injection volume as their technical secrets and do not disclose it to the public. Since vehicle manufacturers will not actively provide this data, this supervision method is only suitable for internal self-supervision by manufacturers, resulting in loopholes in the environmental protection department's supervision of vehicle urea consumption.

[0005] Therefore, how to diagnose abnormal urea consumption based on the on-board terminal data uploaded according to the National VI emission standards is a technical problem that needs to be solved. Summary of the invention

[0006] The present application provides a method, device, equipment and program product for diagnosing urea consumption of diesel vehicles, so as to solve the problem that diesel vehicles on the market reduce or cut off urea consumption during use to reduce operating costs, resulting in the risk of exceeding the NOx standard in diesel engine exhaust.

[0007] A first aspect of the present application provides a method for diagnosing urea consumption of a diesel vehicle, comprising the following steps: acquiring urea tank liquid level data and cumulative fuel consumption data of the vehicle within a preset time; performing smoothing and filtering processing on the urea tank liquid level data, and calculating the urea-fuel ratio within the preset time based on the processed urea tank liquid level data and the cumulative fuel consumption data, and identifying whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than a preset time; if there is no time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time, determining whether the proportion of time in which the urea-fuel ratio within the preset time is greater than a preset urea-fuel ratio threshold is greater than a preset proportion; if the proportion of time in which the urea-fuel ratio within the preset time is greater than the preset urea-fuel ratio threshold is greater than the preset proportion, determining that the urea consumption within the preset time is normal; otherwise, determining that the urea consumption within the preset time is abnormal.

[0008] Optionally, after there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than a preset time, the method includes: determining whether the cumulative fuel consumption of the vehicle within the time interval is greater than the preset fuel consumption; if the cumulative fuel consumption within the time interval is greater than the preset fuel consumption, determining that the urea consumption within the preset time is abnormal.

[0009] Optionally, after determining whether the cumulative fuel consumption of the vehicle within the time interval is greater than the preset fuel consumption, the method further includes: if the cumulative fuel consumption within the time interval is less than the preset fuel consumption, determining that the urea consumption within the preset time is normal.

[0010] Optionally, when it is determined that the urea consumption within the preset time is abnormal, the method further includes: sending alarm information of the abnormal urea consumption to a remote monitoring terminal.

[0011] A second aspect of the present application provides a diagnostic device for urea consumption of a diesel vehicle, comprising: an acquisition module, used to remotely acquire urea tank liquid level data and cumulative fuel consumption data of a vehicle within a preset time; an identification module, used to calculate the urea-fuel ratio within the preset time based on the processed urea tank liquid level data and the cumulative fuel consumption data after smoothing and filtering the urea tank liquid level data, and identify whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time; a diagnosis module, used to determine whether the proportion of time in which the urea-fuel ratio within the preset time is greater than a preset urea-fuel ratio threshold value is greater than a preset proportion if there is no time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time; if the proportion of time in which the urea-fuel ratio within the preset time is greater than the preset urea-fuel ratio threshold value is greater than the preset proportion, it is determined that the urea consumption within the preset time is normal; otherwise, it is determined that the urea consumption within the preset time is abnormal.

[0012] Optionally, after there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than a preset time, the diagnostic module is further used to: determine whether the cumulative fuel consumption of the vehicle within the time interval is greater than the preset fuel consumption; if the cumulative fuel consumption within the time interval is greater than the preset fuel consumption, determine that the urea consumption within the preset time is abnormal.

[0013] Optionally, after determining whether the cumulative fuel consumption of the vehicle within the time interval is greater than the preset fuel consumption, the diagnostic module is further used to: if the cumulative fuel consumption within the time interval is less than the preset fuel consumption, determine that the urea consumption within the preset time is normal.

[0014] Optionally, when it is determined that the urea consumption within the preset time is abnormal, the diagnosis module is further used to: send an alarm message of abnormal urea consumption to a remote monitoring terminal.

[0015] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for diagnosing urea consumption of a diesel vehicle as described in the above embodiment.

[0016] A fourth aspect of the present application provides a computer program product having a computer program stored thereon, which is executed by a processor to implement the method for diagnosing urea consumption of a diesel vehicle as described in the above embodiment.

[0017] In the above implementation, the urea tank level data and the cumulative fuel consumption data of the vehicle within the preset time are obtained; the urea tank level data is smoothed and filtered, and the urea-fuel ratio within the preset time is calculated based on the processed urea tank level data and the cumulative fuel consumption data, and it is identified whether there is a time interval in which the urea tank level data is greater than the preset level for a duration greater than the preset time. If there is no time interval in which the urea tank level is greater than the preset level for a duration greater than the preset time, it is determined whether the proportion of time in which the urea-fuel ratio within the preset time is greater than the preset urea-fuel ratio threshold is greater than the preset proportion. If the proportion of time in which the urea-fuel ratio within the preset time is greater than the preset urea-fuel ratio threshold is greater than the preset proportion, it is determined that the urea consumption within the preset time is normal, otherwise, it is determined that the urea consumption within the preset time is abnormal. Thus, the problem that diesel vehicles on the market reduce or cut off urea consumption to reduce operating costs during use, resulting in the risk of excessive NOx in diesel engine exhaust, etc., can be remotely monitored and accurately identified abnormal urea consumption behavior of the vehicle SCR system, ensuring that NOx emissions of diesel vehicles are effectively controlled during actual use.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A flowchart of a method for diagnosing urea consumption of a diesel vehicle provided according to an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of urine-to-fuel ratio (% / L) distribution of 12 vehicles of a certain model according to an embodiment of the present application;

[0022] Figure 3 is a flowchart of a method for obtaining a threshold value a according to an embodiment of the present application;

[0023] Figure 4 It is a schematic diagram of the diagnosis result of urea consumption of a diesel vehicle according to the first embodiment of the present application;

[0024] Figure 5 is a schematic diagram of the diagnosis result of urea consumption of a diesel vehicle according to the second embodiment of the present application;

[0025] Figure 6 This is a flow chart of a method for diagnosing urea consumption of a diesel vehicle according to one embodiment of the present application;

[0026] Figure 7is a schematic diagram of a device for diagnosing urea consumption of a diesel vehicle according to an embodiment of the present application;

[0027] Figure 8 Schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] The following describes the diagnostic method, device, equipment and program product of the urea consumption of a diesel vehicle in the embodiment of the present application with reference to the accompanying drawings. In view of the problem mentioned in the above background technology that the diesel vehicles on the market reduce or cut off the urea consumption during use to reduce the operating cost, resulting in the risk of excessive NOx in diesel engine exhaust, the present application provides a diagnostic method for the urea consumption of a diesel vehicle, in which the urea tank liquid level data and the cumulative fuel consumption data of the vehicle within a preset time are obtained; the urea tank liquid level data is smoothed and filtered, and the urea-fuel ratio within the preset time is calculated based on the processed urea tank liquid level data and the cumulative fuel consumption data, and it is identified whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time, if there is no time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time, it is determined whether the time proportion of the urea-fuel ratio within the preset time being greater than the preset urea-fuel ratio threshold is greater than the preset ratio, if the time proportion of the urea-fuel ratio within the preset time being greater than the preset urea-fuel ratio threshold is greater than the preset ratio, it is determined that the urea consumption within the preset time is normal, otherwise, it is determined that the urea consumption within the preset time is abnormal. This solves the problem that diesel vehicles on the market reduce or cut off urea consumption during use to reduce operating costs, resulting in the risk of exceeding the NOx standard in diesel engine exhaust. It can remotely monitor and accurately identify abnormal urea consumption behavior in the vehicle's SCR system, ensuring that NOx emissions from diesel vehicles are effectively controlled during actual use.

[0030] Specifically, Figure 1 A schematic flow chart of a method for diagnosing urea consumption of a diesel vehicle provided in an embodiment of the present application.

[0031] like Figure 1 As shown, the method for diagnosing urea consumption of a diesel vehicle comprises the following steps:

[0032] In step S101, urea tank liquid level data and accumulated fuel consumption data of a vehicle within a preset time are obtained.

[0033] In step S102, the urea tank liquid level data is smoothed and filtered, and the urea-fuel ratio within a preset time is calculated based on the processed urea tank liquid level data and the accumulated fuel consumption data, and it is identified whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time.

[0034] Among them, the preset time length and the preset liquid level can be thresholds set in advance by the user, can be thresholds obtained through a limited number of experiments, or can be thresholds obtained through a limited number of computer simulations. In the embodiment of the present application, the preset time length is 30 minutes, and the preset liquid level is 90%.

[0035] The ratio of the percentage change of the urea tank liquid level within a preset time to the accumulated fuel consumption is the urea-fuel ratio.

[0036] In step S103, if there is no time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time, it is determined whether the proportion of time in which the urine-fuel ratio within the preset time is greater than the preset urine-fuel ratio threshold is greater than a preset proportion; if the proportion of time in which the urine-fuel ratio within the preset time is greater than the preset urine-fuel ratio threshold is greater than the preset proportion, it is determined that the urea consumption within the preset time is normal; otherwise, it is determined that the urea consumption within the preset time is abnormal.

[0037] The preset ratio may be a threshold value pre-set by a user, a threshold value obtained through a limited number of experiments, or a threshold value obtained through a limited number of computer simulations. In the embodiment of the present application, the preset ratio is 90%.

[0038] Optionally, in some embodiments, after there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than a preset time, the diagnostic module is further used to: determine whether the cumulative fuel consumption of the vehicle within the time interval is greater than the preset fuel consumption; if the cumulative fuel consumption within the time interval is greater than the preset fuel consumption, determine that the urea consumption within the preset time is abnormal.

[0039] Optionally, in some embodiments, after determining whether the cumulative fuel consumption of the vehicle within the time interval is greater than the preset fuel consumption, the diagnostic module is further used to: if the cumulative fuel consumption within the time interval is less than the preset fuel consumption, determine that the urea consumption within the preset time is normal.

[0040] Among them, the preset fuel consumption can be a threshold value set in advance by the user, can be a threshold value obtained through a limited number of experiments, or can be a threshold value obtained through a limited number of computer simulations. In the embodiment of the present application, the preset fuel consumption is 40L.

[0041] It should be noted that the preset urine-to-fuel ratio threshold value is related to the vehicle type. The calculation basis of different types of vehicles a is as follows: Figure 2 and Figure 3 As shown:

[0042] Calculate the urine-fuel ratio (% / L) of n (n is at least 10) vehicles with low NOx emissions and normal urea injection, and filter out the parts with urine-fuel ratio greater than 0.05 (removing less than 0.05 is to avoid the interference of urine-fuel ratio close to 0 when full of urea), draw box plots for each part, obtain the minimum value a of the 5% quantile of the box plots of these n vehicles, and set it as the preset urine-fuel ratio threshold.

[0043] Specifically, the data uploaded by the on-board terminal required by Appendix Q of the National VI Emission Standard within the preset time is read, including upstream NOx concentration, downstream NOx concentration, SCR inlet temperature, urea tank level data, engine fuel flow, etc., and the measurement data before the release of the NOx sensor dew point detection (dew point protection) is eliminated.

[0044] The urea tank liquid level data is smoothed and filtered, and the filter window is set to 30 minutes to eliminate the error caused by the up and down fluctuation of the urea tank liquid level.

[0045] Furthermore, the urine-fuel ratio (% / L) within the preset time is calculated. The preset time is set to 30 minutes, the moving step is set to 10 minutes, and the ratio of the percentage change of the urea tank level in the window to the cumulative fuel consumption is the urine-fuel ratio. The urea tank volume of different types of vehicles is different, but the urea tank level percentage is calculated based on the urea volume. Therefore, the urea tank level change in the window is directly used here to represent the urea consumption (%). The cumulative fuel consumption (L) in the window is calculated using the engine fuel flow rate of the remote monitoring data.

[0046] It is further identified whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time, that is, it is identified whether there is a time interval in which the urea tank liquid level is greater than 90% for 30 consecutive minutes. If there is a time interval, the following determination is made:

[0047] If the accumulated fuel consumption in the time interval is less than 40L, it is determined that urea is injected normally in the time interval, and the current urea-fuel ratio is assigned a value greater than the preset urea-fuel ratio threshold a; if the accumulated fuel consumption in the time interval is greater than 40L, it is determined that urea injection in the time interval is abnormal, and the current urea-fuel ratio is assigned a value less than the preset urea-fuel ratio threshold a.

[0048] If there is no time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time, it is determined whether the proportion of time during which the urine-fuel ratio within the preset time is greater than the preset urine-fuel ratio threshold a is greater than 90%. If the proportion of time during which the urine-fuel ratio within the preset time is greater than the preset urine-fuel ratio threshold a is greater than 90%, it can also be understood that the proportion of time during which the urine-fuel ratio within the preset time is less than the preset urine-fuel ratio threshold a is less than 10%, then it is determined that the urea consumption within the preset time is normal; otherwise, it is determined that the urea consumption within the preset time is abnormal, that is, it is determined that the urea injection within the preset time is insufficient.

[0049] Optionally, in some embodiments, when it is determined that the urea consumption within the preset time is abnormal, the diagnosis module is further used to: send an alarm message of abnormal urea consumption to the remote monitoring terminal.

[0050] When it is determined that the urea consumption is abnormal, the Internet of Vehicles device automatically generates an alarm message, which should include key information such as vehicle identification, urea consumption, and abnormal time. The Internet of Vehicles device sends the generated alarm message to the remote monitoring terminal through wireless communication technologies such as GPRS. After receiving the alarm message, the remote monitoring terminal analyzes it and displays the alarm message of abnormal urea consumption of the current vehicle on the monitoring interface.

[0051] For example, case 1 is the failure rate of insufficient urea injection: 22.57%. Figure 4 As shown, it is determined that the urea injection in the evaluation interval is abnormal. Case 2 is the urea under-injection fault accounting for 3.21%. Figure 5 As shown, it is determined that the urea injection in the evaluation interval is normal.

[0052] In order to enable those skilled in the art to further understand the diagnostic method for urea consumption of a diesel vehicle according to the embodiment of the present application, the following is a detailed description in conjunction with a specific embodiment. Figure 6 shown.

[0053] Read the data uploaded by the vehicle terminal required by Appendix Q of the National VI Emission Standard within a preset time, including upstream NOx concentration, downstream NOx concentration, SCR inlet temperature, urea tank level, engine fuel flow, etc., and exclude the measurement data before the release of the NOx sensor dew point detection (dew point protection).

[0054] The urea tank liquid level is smoothed and filtered, and the urine-fuel ratio (% / L) of the preset time is calculated. If there is no time interval in which the urea tank liquid level is greater than the preset liquid level and the duration is greater than the preset time, the urine-fuel ratio of the preset time is compared with the preset urine-fuel ratio threshold a. When the time proportion of the urine-fuel ratio greater than or equal to the preset urine-fuel ratio threshold a is greater than 90%, or the time proportion of the urine-fuel ratio within the preset time is less than the preset urine-fuel ratio threshold a is less than 10%, it is determined that the urea injection within the preset time is normal, otherwise, it is determined that the urea injection is insufficient;

[0055] If there is a time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time, then when the cumulative fuel consumption in the time interval is less than 40L, it is determined that urea is injected normally in the time interval; if the cumulative fuel consumption in the time interval is greater than 40L, it is determined that urea injection in the time interval is insufficient.

[0056] According to the diagnostic method for urea consumption of diesel vehicles proposed in the embodiment of the present application, urea tank liquid level data and cumulative fuel consumption data of the vehicle within a preset time are obtained, the urea tank liquid level data is smoothed and filtered, and the urea-fuel ratio within the preset time is calculated based on the processed urea tank liquid level data and cumulative fuel consumption data, and it is identified whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time. If there is no time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time, it is determined whether the proportion of time in which the urea-fuel ratio within the preset time is greater than a preset urea-fuel ratio threshold is greater than a preset proportion. If the proportion of time in which the urea-fuel ratio within the preset time is greater than the preset urea-fuel ratio threshold is greater than the preset proportion, it is determined that the urea consumption within the preset time is normal. Otherwise, it is determined that the urea consumption within the preset time is abnormal. As a result, the problem of reducing or cutting off urea consumption during use of diesel vehicles on the market to reduce operating costs, which leads to the risk of exceeding the NOx standard in diesel engine exhaust, is solved. It no longer relies on variables such as urea injection volume that are not required by the National VI standard to be uploaded to the remote monitoring platform. Real-time accurate and reliable monitoring of urea consumption to ensure that it is maintained at a normal level is the key to ensuring effective control of NOx emissions from diesel vehicles, and has certain innovation and application prospects.

[0057] Next, a diagnostic device for urea consumption of a diesel vehicle proposed in an embodiment of the present application will be described with reference to the accompanying drawings.

[0058] Figure 7 It is a block diagram of a diagnostic device for urea consumption of a diesel vehicle according to an embodiment of the present application.

[0059] like Figure 7 As shown, the diagnostic device 10 for urea consumption of a diesel vehicle includes: an acquisition module 100 , an identification module 200 and a diagnostic module 300 .

[0060] Among them, the acquisition module 100 is used to remotely acquire the urea tank liquid level data and the cumulative fuel consumption data of the vehicle within a preset time; the identification module 200 is used to calculate the urine-fuel ratio within the preset time based on the processed urea tank liquid level data and the cumulative fuel consumption data after smoothing and filtering the urea tank liquid level data, and identify whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time; the diagnosis module 300 is used to determine whether the proportion of time in which the urine-fuel ratio within the preset time is greater than the preset urine-fuel ratio threshold is greater than a preset proportion if there is no time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time; if the proportion of time in which the urine-fuel ratio within the preset time is greater than the preset urine-fuel ratio threshold is greater than the preset proportion, it is determined that the urea consumption within the preset time is normal; otherwise, it is determined that the urea consumption within the preset time is abnormal.

[0061] Optionally, in some embodiments, after there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than a preset time, the diagnostic module 300 is further used to: determine whether the cumulative fuel consumption of the vehicle within the time interval is greater than the preset fuel consumption; if the cumulative fuel consumption within the time interval is greater than the preset fuel consumption, determine that the urea consumption within the preset time is abnormal.

[0062] Optionally, in some embodiments, after determining whether the cumulative fuel consumption of the vehicle within the time interval is greater than the preset fuel consumption, the diagnostic module 300 is further used to: if the cumulative fuel consumption within the time interval is less than the preset fuel consumption, determine that the urea consumption within the preset time is normal.

[0063] Optionally, in some embodiments, when it is determined that the urea consumption within the preset time is abnormal, the diagnosis module 300 is further used to: send an alarm message of abnormal urea consumption to a remote monitoring terminal.

[0064] It should be noted that the above explanation of the embodiment of the method for diagnosing urea consumption of a diesel vehicle is also applicable to the device for diagnosing urea consumption of a diesel vehicle of this embodiment, and will not be repeated here.

[0065] According to the diagnostic device for urea consumption of diesel vehicles proposed in the embodiment of the present application, the urea tank liquid level data and the cumulative fuel consumption data of the vehicle within the preset time are obtained; the urea tank liquid level data is smoothed and filtered, and the urine-fuel ratio within the preset time is calculated based on the processed urea tank liquid level data and the cumulative fuel consumption data, and it is identified whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time. If there is no time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time, it is determined whether the time proportion of the urine-fuel ratio within the preset time being greater than the preset urine-fuel ratio threshold is greater than the preset ratio. If the time proportion of the urine-fuel ratio within the preset time being greater than the preset urine-fuel ratio threshold is greater than the preset ratio, it is determined that the urea consumption within the preset time is normal, otherwise, it is determined that the urea consumption within the preset time is abnormal. Thus, the problem that diesel vehicles on the market reduce or cut off urea consumption to reduce operating costs during use, resulting in the risk of excessive NOx in diesel engine exhaust, etc., can be remotely monitored and accurately identified abnormal urea consumption behavior of the vehicle SCR system, ensuring that NOx emissions of diesel vehicles are effectively controlled during actual use.

[0066] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0067] A memory 801 , a processor 802 , and a computer program stored in the memory 801 and executable on the processor 802 .

[0068] When the processor 802 executes the program, the method for diagnosing urea consumption of a diesel vehicle provided in the above embodiment is implemented.

[0069] Furthermore, the electronic device further comprises:

[0070] The communication interface 803 is used for communication between the memory 801 and the processor 802 .

[0071] The memory 801 is used to store computer programs that can be executed on the processor 802 .

[0072] The memory 801 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0073] If the memory 801, the processor 802 and the communication interface 803 are implemented independently, the communication interface 803, the memory 801 and the processor 802 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0074] Optionally, in a specific implementation, if the memory 801, the processor 802 and the communication interface 803 are integrated on a chip, the memory 801, the processor 802 and the communication interface 803 can communicate with each other through an internal interface.

[0075] The processor 802 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0076] An embodiment of the present application also provides a computer program product, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned method for diagnosing urea consumption of a diesel vehicle is implemented.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0079] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0080] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer program product for use with an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, a "computer program product" can be any device that can contain, store, communicate, propagate or transmit a program for use with an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer program products (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). Furthermore, the computer program product may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example by optically scanning the paper or other medium and then editing, interpreting or, if necessary, processing in another suitable manner, and then storing it in a computer memory.

[0081] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0082] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer program product, which, when executed, includes one or a combination of the steps of the method embodiment.

[0083] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer program product.

[0084] The computer program product mentioned above may be a read-only memory, a disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for diagnosing urea consumption of a diesel vehicle, characterized in that: The following steps are involved: Obtain the vehicle's urea tank level data and cumulative fuel consumption data within a preset time; Performing smoothing and filtering processing on the urea tank liquid level data, and calculating the urea-fuel ratio within the preset time based on the processed urea tank liquid level data and the accumulated fuel consumption data, and identifying whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time; If there is no time interval in which the urea tank liquid level is greater than the preset liquid level for a duration greater than the preset time, it is determined whether the proportion of time during which the urine-to-fuel ratio within the preset time is greater than the preset urine-to-fuel ratio threshold is greater than a preset proportion; if the proportion of time during which the urine-to-fuel ratio within the preset time is greater than the preset urine-to-fuel ratio threshold is greater than the preset proportion, it is determined that the urea consumption within the preset time is normal; otherwise, it is determined that the urea consumption within the preset time is abnormal.

2. The method according to claim 1, characterized in that After there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset duration, the method includes: Determining whether the cumulative fuel consumption of the vehicle within the time interval is greater than a preset fuel consumption; If the accumulated fuel consumption in the time interval is greater than the preset fuel consumption, it is determined that the urea consumption in the preset time is abnormal.

3. The method according to claim 2, characterized in that After determining whether the accumulated fuel consumption of the vehicle in the time interval is greater than a preset fuel consumption, the method includes: If the accumulated fuel consumption in the time interval is less than the preset fuel consumption, it is determined that the urea consumption in the preset time is normal.

4. The method according to claim 1, characterized in that When determining that the urea consumption within the preset time is abnormal, the method further includes: Send alarm information of abnormal urea consumption to the remote monitoring terminal.

5. A diagnostic device for urea consumption of a diesel vehicle, characterized in that: include: An acquisition module is used to remotely acquire the urea tank level data and cumulative fuel consumption data of the vehicle within a preset time; an identification module, configured to perform smoothing and filtering on the urea tank liquid level data, calculate the urea-fuel ratio within the preset time based on the processed urea tank liquid level data and the accumulated fuel consumption data, and identify whether there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time; The diagnostic module is used to determine whether the proportion of time during which the urine-to-fuel ratio within the preset time is greater than a preset urine-to-fuel ratio threshold value is greater than a preset proportion if there is no time interval during which the duration during which the urea tank liquid level is greater than the preset liquid level is greater than the preset time is greater than a preset proportion; if the proportion of time during which the urine-to-fuel ratio within the preset time is greater than the preset urine-to-fuel ratio threshold value is greater than the preset proportion, it is determined that the urea consumption within the preset time is normal; otherwise, it is determined that the urea consumption within the preset time is abnormal.

6. The device according to claim 5, characterized in that After there is a time interval in which the urea tank liquid level data is greater than the preset liquid level for a duration greater than the preset time, the diagnostic module is further configured to: Determining whether the cumulative fuel consumption of the vehicle within the time interval is greater than a preset fuel consumption; If the accumulated fuel consumption in the time interval is greater than the preset fuel consumption, it is determined that the urea consumption in the preset time is abnormal.

7. The device according to claim 6, characterized in that After determining whether the cumulative fuel consumption of the vehicle within the time interval is greater than a preset fuel consumption, the diagnostic module is further configured to: If the accumulated fuel consumption in the time interval is less than the preset fuel consumption, it is determined that the urea consumption in the preset time is normal.

8. The device according to claim 5, characterized in that When it is determined that the urea consumption within the preset time is abnormal, the diagnosis module is further used to: Send alarm information of abnormal urea consumption to the remote monitoring terminal.

9. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for diagnosing urea consumption of a diesel vehicle as claimed in any one of claims 1 to 4.

10. A computer program product having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method for diagnosing urea consumption of a diesel vehicle as described in any one of claims 1 to 4.

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