Data acquisition device, analysis device, analysis method, and computer program product

Abstract

The application provides a data acquisition device (20) installed on a vehicle, wherein the vehicle is provided with a diesel engine and an SCR, and the data acquisition device (20) comprises: a data acquisition unit configured to acquire data information of an operating state of the vehicle; and a data transmission unit configured to transmit the data information to other electronic devices in a wired or wireless manner, wherein the data acquisition unit is configured to acquire a first operating parameter related to the operating state of the SCR, the data transmission unit is configured to transmit the first operating parameter to an analysis device (10), and the analysis device (10) is capable of analyzing a failure risk result of the SCR according to the first operating parameter and a second operating parameter acquired by the analysis device (10) before the first operating parameter is acquired. The application also relates to an analysis device (10), an analysis method and a computer program product. According to the application, the failure risk of the SCR can be predicted in advance.

Description

TECHNICAL FIELD

[0001] The present application relates to an analysis device for analyzing an operating state of an SCR (Selective Catalytic Reduction) of a vehicle, a data acquisition device installed on a vehicle, an analysis method for analyzing an operating state of an SCR of a vehicle by using an analysis device, and a computer program product. BACKGROUND

[0002] Diesel engines are widely used in small, heavy or large vehicles due to their good reliability, high thermal efficiency and large output torque. However, due to the high content of nitrogen oxides in the exhaust gas emitted by diesel engines, the exhaust gas needs to be treated by a dedicated exhaust aftertreatment system before being discharged into the atmosphere to meet the increasingly stringent environmental protection requirements.

[0003] In order to reduce air pollution, the exhaust gas of diesel engines has become a standard equipment of diesel engines. For the treatment of exhaust gas, the selective catalytic reduction method is generally used now, and the liquid reducing agent (usually urea aqueous solution) is sprayed into the exhaust pipe in the form of aerosol by the injector, and the harmful gas in the exhaust gas is changed into harmless gas by selective catalytic reduction reaction, and then discharged into the atmosphere, thereby reducing the damage to the environment.

[0004] For this reason, the exhaust aftertreatment system usually includes an SCR. During the use of the vehicle, the over-high temperature, the over-low temperature or the use of unqualified fuel of the SCR will affect the SCR, which may cause the failure of the SCR. The failure of the SCR will seriously affect the emission of nitrogen oxides, and the repair and replacement of the failed SCR will also be a high cost for the user of the vehicle. Therefore, how to judge and predict the failure risk of the SCR in advance and remind the user of the vehicle to avoid the damage of the SCR is a problem to be solved.

[0005] At present, the faults of the SCR can be diagnosed by the on-board diagnostic system. However, due to the limitation of storage space and computing power, the on-board diagnostic system only analyzes the current operating parameters of the SCR, and can only diagnose the faults that have occurred, but cannot predict the failure risk of the SCR in advance.

[0006] Therefore, it is necessary to improve the existing analysis process of the operating state of the SCR in order to overcome at least one of the above-mentioned disadvantages. SUMMARY

[0007] The purpose of the present application is to provide an improved analysis process for analyzing the operating state of an SCR of a vehicle, thereby predicting the failure risk of the SCR in advance.

[0008] According to a first aspect of the present application, there is provided a data acquisition device for installation on a vehicle, said vehicle being equipped with a diesel engine and an SCR, wherein said data acquisition device comprises a data acquisition unit configured to acquire data information of an operating state of said vehicle, and a data transmission unit configured to transmit data information to other electronic devices by wired or wireless means, wherein the data acquisition unit is configured to acquire a first operating parameter related to an operating state of the SCR installed on the vehicle, and the data transmission unit is configured to transmit said first operating parameter to an analysis device and enable said analysis device to analyze a failure risk result of said SCR according to said first operating parameter and a second operating parameter acquired by the analysis device before the first operating parameter is acquired.

[0009] It should be understood that, in the present document, the expressions "first", "second", etc. are used only for descriptive purposes and should not be understood as indicating or implying relative importance or the number or kind of the technical features indicated. For example, the first operating parameter and the second operating parameter can be the same type of operating parameter representing the same characteristic.

[0010] According to a second aspect of the present application, there is provided an analysis device for analyzing an operating state of an SCR of a vehicle, wherein said analysis device comprises an acquisition unit configured to acquire a first operating parameter related to an operating state of the SCR, a storage unit configured to store a second operating parameter acquired before the first operating parameter is acquired, and an evaluation unit configured to predict a failure risk of the analyzed SCR according to the first operating parameter and the second operating parameter.

[0011] According to a third aspect of the present application, there is provided an analysis method for analyzing an operating state of an SCR of a vehicle by using an analysis device according to the present application, said analysis method comprising the steps of: acquiring, by using an acquisition unit, a first operating parameter related to an operating state of the SCR; storing, in a storage unit, a second operating parameter acquired before the first operating parameter is acquired; and predicting, by using an evaluation unit, a failure risk of the analyzed SCR according to the first operating parameter and the second operating parameter.

[0012] According to a fourth aspect of the present application, there is provided a computer program product comprising computer program instructions which, when executed by one or more processors, enable said processors to perform an analysis method according to the present application.

[0013] The positive effect of the present application is that, by the present application, the failure risk of the analyzed SCR can be predicted according to the current operating parameters of the analyzed SCR and the operating parameters previously acquired and stored by the analysis device. Compared with the fault diagnosis only according to the current operating parameters of the SCR, the analysis device according to the present application can more accurately analyze the operating state of the SCR. BRIEF DESCRIPTION OF DRAWINGS

[0014] The principles, features and advantages of the present application can be better understood by referring to the following detailed description of the application in conjunction with the accompanying drawings in which:

[0015] Figure 1 The analysis device according to one exemplary embodiment of the present application is schematically shown;

[0016] Figure 2 The normal distribution curve of the operating efficiency of the SCR in different states within a predetermined time period is schematically shown; and

[0017] Figure 3 The normal distribution characteristics of the operating efficiency of the SCR with the working time are schematically shown. DETAILED DESCRIPTION

[0018] In order to make the technical problems to be solved by the present application, the technical solutions and the beneficial technical effects more clearly understood, the present application will be further described in detail below in conjunction with the drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the protection scope of the present application.

[0019] Figure 1 The analysis device 10 for analyzing the operating state of the SCR of a vehicle according to one exemplary embodiment of the present application is schematically shown. The vehicle is provided with a diesel engine and an SCR for performing exhaust aftertreatment, for example.

[0020] As Figure 1As shown, the analysis device 10 comprises an acquisition unit 12, a storage unit 14 and an evaluation unit 16. The acquisition unit 12 is configured to acquire a first operating parameter related to the operating state of the SCR. For example, the acquisition unit 12 can acquire the first operating parameter from a data acquisition device 20 installed on the vehicle. The storage unit 14 is configured to store a second operating parameter acquired before the first operating parameter is acquired. The evaluation unit 16 is configured to predict the failure risk of the analyzed SCR according to the first operating parameter and the second operating parameter. Thus, the analysis device 10 can store the acquired operating parameters by means of the storage unit 14, so as to predict the failure risk of the analyzed SCR according to the current operating parameter of the analyzed SCR and the operating parameters previously acquired and stored by the analysis device. Compared with the fault diagnosis according to the current operating parameter of the SCR only, the analysis device according to the present application can more accurately analyze the operating state of the SCR and predict the failure risk of the SCR.

[0021] The operating parameter may, for example, comprise at least one of the following parameters: the efficiency of the SCR, the temperature at the inlet of the SCR, the temperature at the outlet of the SCR, the concentration of nitrogen oxides upstream of the SCR and the concentration of nitrogen oxides downstream of the SCR, etc.

[0022] Optionally, one or both of the storage unit 14 and the evaluation unit 16 of the analysis device 10 are / is arranged on the vehicle or on a cloud server.

[0023] In Figure 1 In the embodiment shown, the analysis device 10 is arranged on the cloud server as a whole. By means of the cloud server, data from a large number of vehicles can be acquired, and a large amount of data can be stored for analyzing the operating state of the SCR. By means of the cloud server, the operating state of the SCR can be analyzed based on big data, in particular. This is advantageous for more accurately predicting the failure risk of the SCR. By means of the cloud server to predict the failure risk of the SCR, the need for modification of the vehicle can also be reduced or even avoided, and the development, updating and application of software are facilitated.

[0024] In another exemplary embodiment according to the present application, the analysis device 10 can also be other devices other than the cloud server, for example, the analysis device 10 can be an on-board analysis device, such as an electronic control unit, installed on the vehicle.

[0025] In one exemplary embodiment according to the present application, the second operating parameter comprises a local SCR second operating parameter, which is an operating parameter of the operating state of the analyzed SCR. Thus, a longitudinal comparison can be made for the same SCR. For example, the same operating parameter of the same SCR can be analyzed for the trend of change. Thus, the failure risk of the SCR can be more accurately predicted.

[0026] For example, the evaluation unit 16 is configured to derive a normal distribution characteristic of the operating efficiency of the analyzed SCR over a predetermined period of time from the first operating parameter and the second operating parameter in order to predict the failure risk of the analyzed SCR. The predetermined period of time can be set as desired, for example, between 1 day and 4 days, in particular between 2 days and 3 days.

[0027] Figure 2 A normal distribution diagram of the operating efficiency E of different states of the SCR over a predetermined period of time is shown schematically, wherein the solid line shows the normal distribution of the operating efficiency of a normal SCR and the dashed line shows the normal distribution of the operating efficiency of a failed SCR. As shown, Figure 2 the normal distribution of the operating efficiency of a normal SCR has a large expected value and a concentrated distribution. Figure 3 A change of the normal distribution characteristic of the operating efficiency E of the SCR over the operating time T is shown schematically. As shown, Figure 3 with increasing operating time, the SCR gradually deteriorates, the expected value of the normal distribution of the operating efficiency decreases and the standard deviation increases. From the normal distribution characteristic of the operating efficiency, the failure risk of the SCR can be predicted more accurately.

[0028] The evaluation unit 16 can in particular be configured to predict a failure risk of the analyzed SCR when the expected value of the normal distribution of the operating efficiency is less than an expected value threshold μ T and / or the standard deviation of the normal distribution is greater than a standard deviation threshold σ T . The expected value threshold μ T and the standard deviation threshold σ T may be a respective predetermined expected value threshold μ T and standard deviation threshold σ T . For example, when the normal distribution of the operating efficiency of the SCR is shown as a dashed-dotted line in Figure 2 , the expected value thereof is less than the expected value threshold μ T , and therefore the evaluation unit 16 predicts a failure risk of the SCR.

[0029] Alternatively or additionally, the second operating parameter can comprise a further SCR second operating parameter, which is an operating parameter relating to the operating state of a further SCR. Thereby, a lateral comparison of different SCRs is possible. For example, operating parameters of different SCRs of the same type can be analyzed. Thereby, the failure risk of the SCR can be predicted more accurately.

[0030] The analysis device 10 is arranged to be able to obtain and store information about the SCR's pertaining vehicle model and / or working time and / or associated engine's working conditions, wherein the SCR's second operating parameter comprises operating parameters of a plurality of SCR's having the same pertaining vehicle model and / or working time and / or associated engine's working conditions as the analyzed SCR. It is to be understood that "the same" in this context not only includes the case of being exactly the same, but also includes the case of being substantially the same, e.g. the case of deviating no more than 20%, in particular 10%, of one from the other. In this context, "a plurality" means at least two, e.g. two, three, etc., unless explicitly specified otherwise.

[0031] When the analyzed SCR differs significantly from said plurality of SCR's having the same pertaining vehicle model and / or working time and / or associated engine's working conditions, the evaluation unit 16 can predict that the analyzed SCR is at risk of failing.

[0032] The evaluation unit 16 is in particular arranged to be able to calculate an average of at least one operating parameter of said plurality of SCR's having the same pertaining vehicle model and / or working time and / or associated engine's working conditions, and to predict the analyzed SCR's risk of failing based on said average.

[0033] For example, the evaluation unit 16 can calculate an average of the mean value and standard deviation of the normal distribution of the operating efficiency of a plurality of SCR's having the same pertaining vehicle model and working time, and determine a mean value threshold μ T and a standard deviation threshold σ T based on the average of the mean value and standard deviation, respectively. Then, the mean value and / or standard deviation of the normal distribution of the operating efficiency of the analyzed SCR can be compared with the mean value threshold μ T and / or the standard deviation threshold σ T determined based on the operating parameters of the operating state of said further SCR, in order to predict the analyzed SCR's risk of failing.

[0034] It is to be understood that lateral comparisons between different SCR's can be made for various operating parameters, e.g. the operating efficiency of the SCR's, the temperature at the SCR inlet, the temperature at the SCR outlet, the nitrogen oxide concentration upstream the SCR, or the nitrogen oxide concentration downstream the SCR, etc., exemplarily listed above.

[0035] In an exemplary embodiment according to the application, the analysis device 10 is able to send a warning message to a warning device, for example a mobile terminal 30 bound to the respective vehicle, when a failure risk of the SCR is predicted. For example, the analysis device 10 is able to send a warning message to the mobile terminal 30, for example of the owner of the vehicle, by means of a short message, an e-mail or an application message. The mobile terminal 30 is, for example, a mobile phone. Thereby, the user can be timely reminded to take appropriate measures. Alternatively or additionally, the analysis device 10 is able to send a warning message directly to a further warning device, for example a vehicle-mounted warning device of the respective vehicle. The vehicle-mounted warning device is configured to alert the driver and the passengers by means of light, acoustic message or screen display message, etc. upon receipt of the warning message.

[0036] The application further relates to a data acquisition device 20 to be installed on a vehicle, on which a diesel engine and an SCR are installed, wherein the data acquisition device 20 comprises a data acquisition unit configured to acquire data information of the operating state of the vehicle and a data transmission unit configured to transmit the data information to other electronic devices by means of wire or wireless. The data acquisition unit is configured to acquire a first operating parameter about the operating state of the SCR installed on the vehicle, and the data transmission unit is configured to transmit the first operating parameter to the analysis device 10 and enable the analysis device 10 to analyze the failure risk result of the SCR according to the first operating parameter and a second operating parameter acquired by the analysis device 10 before the first operating parameter is acquired. Optionally, the analysis device 10 is configured according to the analysis device 10 of the application.

[0037] The data acquisition device 20 is further configured to obtain information about the model of the vehicle and / or the working time of the SCR and / or the working condition of the engine associated with the SCR and transmit to the analysis device 10.

[0038] For example, the data acquisition device 20 is configured to communicate with the electronic control unit of the vehicle by means of an on-board diagnostic interface, so as to obtain the operating parameters, for example.

[0039] The operating parameters can be transmitted between the data acquisition device 20 and the analysis device 10 in particular by means of wireless communication.

[0040] The application further relates to an analysis system for analyzing the operating state of the SCR of a vehicle, wherein the analysis system comprises a data acquisition device 20 and a warning device.

[0041] The application also relates to an analysis method for analyzing the operating state of an SCR of a vehicle using an analysis device 10, the analysis method comprising the following steps: acquiring a first operating parameter relating to the operating state of the SCR using an acquisition unit 12; a second operating parameter acquired before the first operating parameter is stored in the storage unit 14; and predicting the failure risk of the analyzed SCR from the first operating parameter and the second operating parameter using an evaluation unit 16. It should be understood that the features and advantages described herein for the analysis device 10 also apply to the analysis method.

[0042] In addition, the application also relates to a computer program product comprising computer program instructions which, when executed by one or more processors, enable the processors to perform the analysis method according to the application. The computer program instructions can be stored in a computer-readable storage medium, which can include, for example, a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash storage device, or other volatile solid-state storage device. The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor, or the processor can also be any conventional processor, etc.

[0043] Although specific embodiments of the application are described in detail herein, they are offered by way of explanation only and are not intended to limit the scope of the application. Various alternatives, modifications and equivalents can be conceived without departing from the spirit and scope of the application.

[0044] List of reference signs

[0045] 10 analysis device

[0046] 12 acquisition unit

[0047] 14 storage unit

[0048] 16 evaluation unit

[0049] 20 data acquisition device

[0050] 30 mobile terminal

Claims

1. An analysis device (10) for analyzing the operating state of an SCR of a vehicle, wherein: The analysis device (10) comprises: an acquisition unit (12), the acquisition unit (12) being configured to acquire a first operating parameter related to an operating state of the SCR and additional information related to an operating time of the SCR; a storage unit (14) configured to store second operating parameters acquired before acquiring the first operating parameters, the second operating parameters including operating parameters of another SCR having the same operating time as the analyzed SCR; and An evaluation unit (16) is configured to derive a normal distribution characteristic of the operating efficiency of the analyzed SCR within a predetermined time period based on the first operating parameter and the second operating parameter, and to calculate an average value of the normal distribution characteristics of the operating efficiency of the other SCRs having the same operating time within the predetermined time period, thereby comparing the normal distribution characteristic of the analyzed SCR with the average value to predict the failure risk of the analyzed SCR.

2. The analysis device (10) according to claim 1, wherein One or both of the storage unit (14) and the evaluation unit (16) are arranged in the vehicle or the cloud server; and / or The second operating parameter includes at least one of the following: a second operating parameter of the SCR, wherein the second operating parameter of the SCR is an operating parameter related to the operating state of the SCR being analyzed; The other SCR second operating parameter is an operating parameter related to the operating state of the other SCR.

3. The analysis device (10) according to claim 2, wherein: The analysis device (10) is configured to acquire and store information about the vehicle model to which the SCR belongs and / or the operating conditions of the associated engine, wherein the second operating parameters of the SCR include operating parameters of a plurality of SCRs having the same vehicle model and / or operating time and / or the operating conditions of the associated engine as the SCR being analyzed.

4. The analysis device (10) according to claim 3, wherein The evaluation unit (16) is configured to calculate an average value of at least one operating parameter of the plurality of SCRs having the same vehicle model and / or associated engine operating conditions, and to compare the corresponding operating parameter of the analyzed SCR with the average value in order to predict the failure risk of the analyzed SCR.

5. The analysis device (10) according to any one of claims 1 to 4, wherein: The analysis device (10) is configured to send a warning message to an onboard warning device of a corresponding vehicle and / or a mobile terminal (30) bound to the corresponding vehicle when a failure risk of the SCR is predicted.

6. A method for analyzing the operating state of an SCR of a vehicle using the analyzing device (10) according to any one of claims 1 to 5, the method comprising the following steps: Using an acquisition unit (12) to acquire a first operating parameter related to the operating state of the SCR; The second operating parameter acquired before the first operating parameter is acquired is stored in the storage unit (14); and The evaluation unit (16) is used to predict the failure risk of the analyzed SCR based on the first operating parameter and the second operating parameter.

7. A computer program product comprising computer program instructions, which, when executed by one or more processors, enable the processors to perform the analysis method according to claim 6.

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