Management device, management method, and management program

Abstract

To provide a technology for enabling a business operator owning a vehicle to execute planned maintenance.SOLUTION: According to an embodiment, a management device includes an acquisition part for acquiring execution time being time for executing regeneration processing of a purifier installed in an exhaust pipe of an engine of a vehicle, and an immediate differential pressure value showing difference between pressure values before and after of the purifier after executing the regeneration processing, a storage part for storing the regeneration time and the immediate differential pressure value, a report generation part for generating a DPD report including information obtained by making the regeneration time and the differential pressure value time series on the basis of the regeneration time and the immediate differential pressure value stored in the storage part, and an output part for outputting the DPD report.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a management device, a management method, and a management program. [Background technology]

[0002] The exhaust gas purification device (DPD: Diesel Particulate Defuser) installed in the engine's exhaust pipe is a filter that captures ash (ASH) and particulate matter (PM: Particulate Matter) such as soot resulting from engine oil. PM captured by the DPD can be removed by performing a regeneration process such as post-injection. However, ash cannot be removed by regeneration, so it is necessary to understand the amount of ash accumulation and take measures such as removing the ash (ash washing).

[0003] The amount of ash accumulation can be estimated, for example, based on the differential pressure across the DPD.

[0004] Patent Document 1 discloses a technology for appropriately notifying a manager of regeneration information for an exhaust gas purification filter (compatible with DPD). Furthermore, Patent Document 1 diagnoses and notifies the PM trapping function and PM trapping function based on the regeneration information transmitted from the vehicle. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-218709 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the invention described in Patent Document 1 does not notify the business owner of the vehicle (hereinafter referred to as the owner) of regeneration information or changes in the differential pressure value. As a result, the owner is unable to grasp the state of ash accumulation. This ultimately leads to the problem that the owner is unable to perform vehicle maintenance in a planned manner.

[0007] The present invention has been made in light of the above-mentioned circumstances, and an object of the present invention is to provide a technique that allows vehicle owners to carry out maintenance in a planned manner. [Means for solving the problem]

[0008] The management device according to the embodiment includes an acquisition unit that acquires the regeneration time of a purification device installed in an exhaust pipe of a vehicle engine when the regeneration process is performed and a differential pressure value that indicates the difference in pressure values ​​before and after the purification device after the regeneration process is performed; a memory unit that stores the regeneration time and the differential pressure value; a report generation unit that generates a DPD report including information in which the regeneration time and the immediate-after differential pressure value are arranged in chronological order based on the regeneration time and the immediate-after differential pressure value stored in the memory unit; and an output unit that outputs the DPD report. [Effects of the Invention]

[0009] The management device described above can provide the vehicle owner with a report that displays information about the DPD regeneration process and the differential pressure value immediately after the regeneration process in chronological order, allowing the owner to plan when to perform maintenance. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a conceptual diagram illustrating an example of a DPD management system according to an embodiment. [Figure 2] FIG. 2 is a block diagram showing an example of a hardware configuration of a DPD management device according to an embodiment and a software configuration associated with the hardware configuration. [Figure 3]FIG. 3 is a flowchart showing an example of a DPD report creation operation according to the embodiment. [Figure 4] FIG. 4 is a diagram showing an example of a DPD report displayed on a display according to the embodiment. [Figure 5] FIG. 4 is a diagram showing an example of a DPD report displayed on a display according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The management device, management method, and management program will be described in detail below with reference to the drawings. In the following embodiments, parts with the same numbers perform similar operations, and redundant description will be omitted. For example, when there are multiple identical or similar elements, a common symbol may be used to describe each element without distinguishing between them, or a subnumber may be used in addition to the common symbol to describe each element with distinction between them.

[0012] [Embodiment] (composition) FIG. 1 is a conceptual diagram illustrating an example of a DPD management system according to an embodiment. As shown in FIG. 1, the DPD management system 100 includes a vehicle 1 and a DPD management device 2.

[0013] The vehicle 1 is a diesel vehicle, and may be, for example, a commercial vehicle such as a truck, etc. The vehicle 1 further includes a control unit 11, an engine 12, and an exhaust purification device 13.

[0014] The control unit 11 may be configured with one or more computers each having one or more processors. For example, the control unit 11 may have a configuration similar to the hardware configuration of the DPD management device 2 described below. The control unit 11 controls the engine 12 and the exhaust purification device 13. For example, the control unit 11 outputs various signals to the engine 12 to control the operation of the engine 12. Furthermore, the control unit 11 may acquire various information from the exhaust purification device 13 and transmit the acquired information to the DPD management device 2 described below via a communication interface and a network (not shown).

[0015] The engine 12 is, for example, a diesel engine. The engine 12 is highly efficient and durable, but emits exhaust gas containing harmful substances such as PM, nitrogen oxides (NOx), carbon monoxide (CO), and hydrocarbons (HC). Therefore, an exhaust purification device 13 is installed in the exhaust pipe of the engine 12, and the harmful substances are purified by the exhaust purification device 13.

[0016] The exhaust purification device 13 includes, from upstream of the exhaust pipe of the engine 12, an oxidation catalyst (DOC: Diesel Oxidation Catalyst) 14, a DPD 15, a differential pressure sensor 16, and the like.

[0017] The DOC 14 is a ceramic cylindrical cell-shaped body with a honeycomb structure consisting of numerous lattices along its axis. The inner surface of the honeycomb structure of the DOC 14 is coated with a precious metal such as platinum (Pt). The catalytic action of the precious metal in the DOC 14 purifies carbon monoxide (CO), hydrocarbons (HC), and other substances contained in the exhaust gas.

[0018] The DPD 15 is a purification device that traps PM in exhaust gas on the surface of its partition wall. The DPD 15 traps PM, and when the accumulation amount of the PM reaches a predetermined amount, it performs a so-called regeneration process to burn and remove the PM. The regeneration process is performed by raising the temperature of the exhaust gas flowing into the DPD 15 to the PM combustion temperature using post-injection or the like.

[0019] Furthermore, the DPD 15 is an example of a purification device, and it goes without saying that any general purification device capable of trapping PM, including a DPF (Diesel Particulate Filter) or a DPR (Diesel Particulate Active Reduction System), may be used.

[0020] The differential pressure sensor 16 measures a differential pressure value, which is the difference between the pressure before and after the DPD 15. For example, when the differential pressure value measured by the differential pressure sensor 16 is greater than a predetermined threshold value, the control unit 11 automatically controls the DPD 15 to perform a regeneration process.

[0021] Here, the regeneration process includes an automatic regeneration process that is automatically performed under the control of the control unit 11, and a manual regeneration process that is performed by the owner of the vehicle 1 or a mechanic at a maintenance shop pressing an operation button or the like. Here, unless otherwise specified, the regeneration process in this embodiment refers to the automatic regeneration process.

[0022] Furthermore, it is possible to estimate the amount of ash accumulated in the DPD 15 based on the differential pressure value immediately after the automatic regeneration process is completed. Here, the ash is generated by the engine oil used in the engine 12 and cannot be removed by the regeneration process. Therefore, the ash accumulated in the DPD 15 needs to be taken to a repair shop or the like and removed by cleaning.

[0023] The DPD management device 2 is, for example, a server installed at a predetermined location owned by the manufacturer of the vehicle 1. The DPD management device 2 acquires various pieces of information transmitted by the control unit 11 provided in the vehicle 1 as DPD information. The DPD information is information acquired by the control unit 11 from the exhaust purification device 13, and includes measurement values ​​necessary for determining whether PM or the like has accumulated. The DPD information includes, for example, at least one of the following: a regeneration time indicating the time when the regeneration process was performed; a regeneration time indicating the time required for the regeneration process; regeneration process information including the mileage until the regeneration process was performed; and an immediate differential pressure value measured by the differential pressure sensor 16 indicating the difference in pressure before and after the regeneration process was performed. Based on the acquired DPD information, the DPD management device 2 then creates and notifies the owner of the vehicle 1 of a DPD report.

[0024] FIG. 2 is a block diagram showing an example of a hardware configuration of the DPD management device 2 according to the embodiment and a software configuration associated with the hardware configuration. First, the hardware configuration of the DPD management device 2 will be described in detail. The DPD management device 2 includes a control unit 21, a program storage unit 22, a data storage unit 23, a communication interface 24, and an input / output interface 25. The control unit 21, the program storage unit 22, the data storage unit 23, the communication interface 24, and the input / output interface 25 are connected to each other via a bus so that they can communicate with each other.

[0025] The DPD management device 2 can realize various operations using a computer such as a PC (Personal Computer), etc. The DPD management device 2 may be configured with one or more computers.

[0026] The control unit 21 controls the DPD management device 2. The control unit 21 includes a hardware processor such as a central processing unit (CPU).

[0027] The program storage unit 22 is configured by combining, for example, a nonvolatile memory such as a solid state drive (SSD) as a storage medium that can be written to and read from at any time, and a nonvolatile memory such as a read-only memory (ROM), and stores middleware such as an operating system (OS), as well as application programs required to execute various control processes according to this embodiment. Hereinafter, the OS and each application program will be collectively referred to as the program.

[0028] The data storage unit 23 stores the DPD information acquired by the control unit 21 and the report information generated by the control unit 21. The data storage unit 23 may be, for example, a storage medium that combines a nonvolatile memory such as an SSD that can be written to and read from at any time with a volatile memory such as a RAM (Random Access Memory). Details of the report information will be described later.

[0029] The communication interface 24 is an interface that enables communication between the DPD management device 2 and external devices, such as devices provided by the vehicle 1 or the owner, and enables the transmission and reception of information. In this embodiment, the communication interface 24 receives DPD information from the vehicle 1 and transmits a DPD report to an external device provided by the owner. The communication interface 24 includes one or more wired or wireless communication modules. For example, the communication interface 24 includes a communication module that wirelessly connects to the vehicle 1 via a network. The communication interface 24 may also include a communication module that connects to a computer owned by the owner of the vehicle 1 via a wired or wireless connection. The communication interface 24 may be any general communication interface as long as it can communicate with the vehicle 1 and external devices, such as devices provided by the owner, under the control of the control unit 21, and transmit and receive DPD information and DPD reports.

[0030] The input / output interface 25 is connected to the input device 251, the output device 252, etc. The input / output interface 25 is an interface that enables transmission and reception of information between the control unit 21 and the input device 251 and the output device 252. The input / output interface 25 may be integrated with the communication interface 24. For example, the input / output interface 25 and at least one of the input device 251 and the output device 252 may be wirelessly connected using short-range wireless technology or the like, and information may be transmitted and received using the short-range wireless technology.

[0031] The input device 251 is an input device used by the administrator of the DPD management device 2 to input information to the DPD management device 2. The input device 251 includes, for example, a keyboard, a pointing device, or the like, which is used by the administrator of the DPD management device 2 to input DPD information. The input device 251 may also include a reader for reading data to be stored in the program storage unit 22 or the data storage unit 23 from a memory medium such as a USB memory, or a disk device for reading such data from a disk medium.

[0032] The output device 252 is a device for outputting information to be presented to the administrator. The output device 252 includes, for example, a display that displays output data to be presented to the administrator from the DPD management device 2, a printer that prints the output data, etc. Furthermore, the output device 252 may be an electronic terminal that the administrator can carry around, or may be integrated with the input device 251.

[0033] Next, the software configuration of the DPD management device 2 will be described in detail. The control unit 21 includes an information acquisition unit 211 , a state determination unit 212 , a report generation unit 213 , a display control unit 214 , and a communication control unit 215 .

[0034] The information acquisition unit 211 is an acquisition unit that acquires DPD information from the control unit 11 provided in the vehicle 1. Then, the information acquisition unit 211 stores the acquired DPD information in an acquired information storage unit 231, which will be described later.

[0035] The state determination unit 212 is a determination unit that determines whether cleaning of the DPD 15 is necessary. For example, the state determination unit 212 determines whether cleaning of the DPD 15 is necessary based on DPD information including the regeneration process information and the immediate differential pressure value stored in the acquired information storage unit 231. Here, the immediate differential pressure value is the difference in pressure before and after the DPD 15 immediately after the regeneration process is performed. For example, if the immediate differential pressure value is greater than a predetermined threshold, the state determination unit 212 may determine that ash has accumulated in the DPD 15 and that cleaning is necessary. The state determination unit 212 outputs the determination result of whether cleaning of the DPD 15 is necessary to the report generation unit 213.

[0036] Report generation unit 213 outputs the DPD information acquired by status determination unit 212 from acquired information storage unit 231 and the determination result of status determination unit 212 as report information and stores it in report information storage unit 232. In other words, report information is information relating to the DPD information and determination result at a certain point in time. Furthermore, report generation unit 213 generates a DPD report based on multiple pieces of report information stored in report information storage unit 232, which will be described later. The DPD report is a report relating to information in which the DPD information is arranged in chronological order and the determination result, generated from multiple pieces of report information. The generated DPD report will be described later in detail.

[0037] The display control unit 214 controls the output device 252 via the input / output interface 25 so that the DPD report generated by the report generation unit 213 is displayed on the display.

[0038] The communication control unit 215 controls the communication interface 24 to transmit the DPD report to the owner of the vehicle 1, which is an external device.

[0039] The data storage unit 23 includes an acquired information storage unit 231 and a report information storage unit 232 .

[0040] The acquired information storage unit 231 is a storage unit used to store the DPD information acquired by the information acquisition unit 211. The report information storage unit 232 is a storage unit used to store the report information generated by the report generation unit 213.

[0041] (operation) FIG. 3 is a flowchart showing an example of a DPD report creation operation according to the embodiment. The control unit 21 of the DPD management device 2 reads out and executes a program stored in the program storage unit 22, thereby realizing the operation of this flowchart.

[0042] This flowchart starts, for example, when the control unit 11 of the vehicle 1 transmits regeneration process information to the DPD management device 2 or transmits an immediate-after differential pressure value to the DPD management device 2. The control unit 11 may transmit the immediate-after differential pressure value and the regeneration process information to the DPD management device 2 every time it acquires them, or may transmit them at predetermined intervals or all at once after the regeneration process has been performed.

[0043] In step ST101, the information acquisition unit 211 acquires an interval period. For example, the information acquisition unit 211 acquires playback processing information including the playback processing time, playback duration, and the mileage until the playback processing is performed. The playback processing information may also include an interval period indicating the period until the playback processing is performed. Here, the interval period is information indicating the period of time until the playback processing is performed. If the interval period is not included, the information acquisition unit 211 may acquire the time when the playback processing was performed and the time when the previous playback processing was performed, which are included in the playback information, from the acquired information storage unit 231, and calculate the interval period. The information acquisition unit 211 stores the acquired interval period and playback processing information in the acquired information storage unit 231.

[0044] In step ST102, the information acquiring unit 211 acquires an immediate differential pressure value. For example, the information acquiring unit 211 acquires an immediate differential pressure value measured by the differential pressure sensor 16. The immediate differential pressure value acquired by the information acquiring unit 211 is assumed to be the difference between the pressure before and after the DPD 15 immediately after the regeneration process is performed. The information acquiring unit 211 stores the acquired immediate differential pressure value in the acquired information storage unit 231.

[0045] It goes without saying that the order of the processes in step ST101 and step ST102 may be reversed, or they may be performed simultaneously.

[0046] In step ST103, the state determination unit 212 determines whether cleaning of the DPD 15 is necessary. For example, the state determination unit 212 determines whether cleaning of the DPD 15 is necessary based on the immediate differential pressure value stored in the acquired information storage unit 231. For example, if the immediate differential pressure value is greater than a predetermined threshold, the state determination unit 212 determines that ash has accumulated in the DPD 15 and that cleaning is necessary. Whether cleaning is necessary may be determined based on an average value of multiple immediate differential pressure values ​​over a predetermined number of recent times, or may be determined based on a single immediate differential pressure value. The predetermined number of times may be any number of times greater than or equal to two.

[0047] The predetermined threshold may include a first threshold and a second threshold greater than the first threshold. For example, if the immediate differential pressure value is greater than the first threshold, it is determined that ash has begun to accumulate in the DPD 15, and if the immediate differential pressure value is greater than the second threshold, it is determined that ash has accumulated in the DPD 15 and that cleaning of the DPD 15 is necessary. Furthermore, the state determination unit 212 may predict how much further the vehicle will have to travel before the immediate differential pressure value exceeds the predetermined threshold, based on the immediate differential pressure value, the mileage, and the like. The state determination unit 212 outputs the determination result to the report generation unit 213.

[0048] The state determination unit 212 may also make a determination based on the interval period. For example, if the immediate differential pressure value is greater than a first predetermined threshold and the interval period is smaller than a second predetermined threshold, the state determination unit 212 may determine that the DPD 15 should be cleaned immediately. In this case, the state determination unit 212 may generate alert information and output it to the report generation unit 213.

[0049] In step ST104, the report generation unit 213 generates a DPD report. The report generation unit 213 generates the DPD report based on the determination result of the state determination unit 212, the regeneration process information and the immediate-after differential pressure value stored in the acquired information storage unit 231, and multiple pieces of report information created in the past stored in the report information storage unit 232. The DPD report includes, for example, the determination result by the state determination unit 212 in step ST103, a graph showing how the immediate-after differential pressure value and regeneration time have changed according to the mileage of the vehicle 1, or a graph showing how the interval period has changed according to the number of regenerations, which is the number of times the regeneration process has been performed on the vehicle 1. When alert information is received, the report generation unit 213 may output the alert information to the display control unit 214 and the communication control unit 215. The display control unit 214 controls the alert information to be displayed on the display of the output device 252. Furthermore, the communication control unit 215 may transmit the alert information to a predetermined device of the owner of the vehicle 1. The owner of the vehicle 1 who receives the alert information may take action based on the alert information, such as bringing forward the maintenance schedule for the vehicle 1. Furthermore, the DPD report is updated at predetermined intervals, and when alert information is generated, the owner may be notified immediately regardless of the timing of updating the DPD report.

[0050] In step ST105, the display control unit 214 performs control to display the DPD report. For example, the display control unit 214 operating as an output control unit acquires the DPD report generated by the report generation unit 213, and performs control to display the DPD report on the display of the output device 252. The communication control unit 215 may also transmit the DPD report to a predetermined device of the owner of the vehicle 1. Note that, although the example described in this embodiment is one in which the DPD report is sent to the owner of the vehicle 1 by electronic means, it goes without saying that the administrator who manages the DPD management device 1 may print the DPD report on paper and send it to the owner of the vehicle 1 on that paper medium.

[0051] 4 and 5 are diagrams showing an example of a DPD report displayed on a display according to the embodiment. The DPD report shown in FIG. 4 shows an example of a display of the overall judgment, DPD playback status, advice, data details, etc.

[0052] The overall judgment indicates a comprehensive judgment based on the DPD information acquired by the control unit 21 and the judgment result of the state judgment unit 212. In the example of Fig. 4, ash has accumulated on the DPD 15, and to indicate that cleaning would be recommended, it is written, "We recommend that you bring the vehicle in for inspection when you have time."

[0053] The DPD regeneration status is shown as a graph with the mileage on the horizontal axis and the regeneration time and the differential pressure value immediately after regeneration on the vertical axis. The white circles on the graph indicate when regeneration processing has been performed. The black line extending parallel to the vertical axis from the white circles indicates the regeneration time. This graph allows users to see how the differential pressure value changes immediately after regeneration according to the actual mileage, and how much the regeneration time has increased.

[0054] The advice includes advice on how to infer the state of the ash accumulated in DPD15 based on the change in differential pressure value immediately afterwards.

[0055] The data details show the difference between the previous report and the current report, allowing you to get a more detailed understanding of how much the condition of the DPD15 has deteriorated since the last time it was brought in for a regular inspection.

[0056] The DPD report shown in Figure 5 shows an example of displaying the overall judgment, DPD regeneration interval status, advice, etc. Here, the DPD regeneration interval is information indicating the interval in distance until regeneration processing is performed.

[0057] The overall judgment and advice may be similar to that shown in FIG.

[0058] In the graph of Figure 5, the horizontal axis shows the number of times the regeneration process has been performed, and the vertical axis shows the mileage and DPD regeneration interval. This graph makes it possible to see how the DPD regeneration interval changes depending on the actual mileage. In the example of Figure 5, the DPD regeneration interval indicates the distance until the regeneration process is performed, so it is shown in mileage [km] rather than time. As shown in the graph of the DPD regeneration interval, it can be seen that as the mileage increases, the regeneration interval becomes shorter, meaning that ash is accumulating.

[0059] Furthermore, as described above, the DPD report may include information indicating that if the immediate differential pressure value is greater than the first threshold, ash has begun to accumulate in the DPD 15, and that if the differential pressure value is greater than the second threshold, ash has accumulated in the DPD 15 and cleaning of the DPD 15 is required. Furthermore, as described above, the DPD report may include information on a predicted value obtained by predicting how far the state determination unit 212 will need to travel before the differential pressure exceeds the first threshold.

[0060] As described above, the control unit 11 generates a DPD report and notifies the owner of the vehicle 1 of the DPD report. This allows the owner of the vehicle 1 to understand the status of the ash accumulated on the DPD 15 of the vehicle 1. This allows the owner to know when it is best to clean the ash accumulated on the DPD 15.

[0061] (Effects of the embodiment) According to the embodiment described above, the regeneration time and regeneration duration when the DPD 15 performs the regeneration process, and the differential pressure value immediately after the regeneration process of the DPD 15 is completed are acquired, and a report is generated that displays this data in chronological order.

[0062] The generated DPD report is then sent to the owner of the vehicle 1. This allows the owner to determine when to wash the DPD 15, and to plan the operation and maintenance of the vehicle 1.

[0063] [Other embodiments] In this embodiment, an example is shown in which the DPD management device 2 is installed at a predetermined location owned by the manufacturer of the vehicle 1, but the DPD management device 2 may also be installed at a predetermined location owned by the owner of the vehicle 1.

[0064] In short, this invention is not limited to the above-described embodiments, and various modifications can be made in the implementation stage without departing from the spirit of the invention. Furthermore, the embodiments may be implemented in combination as appropriate as possible, and in such cases, the combined effects can be obtained. Furthermore, the above-described embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining the disclosed multiple constituent elements. [Explanation of symbols]

[0065] 100...DPD management system 1...Vehicle 2...DPD management device 11...Control unit 12...Engine 13...Exhaust gas purification device 16...Differential pressure sensor 21...Control unit 211…Information acquisition department 212...Status determination unit 213...Report generation unit 214...Display control unit 215...Communication control unit 22...Program memory section 23...Data storage unit 231...Acquired information storage unit 232...Report information storage unit 24...Communication interface 25...Input / output interface 251...input device 252...Output device

Claims

1. an acquisition unit that acquires a regeneration time, which is the time during which a regeneration process of a purification device installed in an exhaust pipe of a vehicle engine is performed, and an immediate differential pressure value, which indicates a difference in pressure values ​​before and after the purification device after the regeneration process is performed; a storage unit that stores the regeneration time and the differential pressure value; a report generation unit that generates a DPD report including information in which the regeneration times and the immediately subsequent differential pressure values ​​are arranged in chronological order based on the regeneration times and the immediately subsequent differential pressure values ​​stored in the storage unit; and an output unit that outputs the DPD report; A management device comprising:

2. The system further includes a state determination unit that determines that cleaning of ash accumulated in the purification device is necessary when the immediate differential pressure value stored in the memory unit is greater than a predetermined threshold value. The management device according to claim 1 .

3. the predetermined threshold comprises a first threshold and a second threshold greater than the first threshold; The state determination unit determines that ash is accumulating in the purification device when the immediate-after differential pressure value is greater than the first threshold value, and determines that cleaning of the ash accumulated in the purification device is necessary when the immediate-after differential pressure value is greater than the second threshold value. The management device according to claim 2 .

4. The DPD report includes information indicating whether cleaning of the ash accumulated in the purification device is required. The management device according to claim 2 or 3.

5. the report generation unit creates a graph showing how the regeneration time and the immediate post-regeneration differential pressure value change according to the mileage of the vehicle, and includes the graph in the DPD report. The management device according to claim 1 .

6. the acquisition unit acquires an interval period indicating an interval until a playback process is performed; the report generation unit creates a graph showing how the interval period changes depending on the travel distance of the vehicle, and includes the graph in the DPD report. The management device according to claim 1 .

7. the acquisition unit acquires an interval period indicating an interval until a playback process is performed; the state determination unit generates alert information for maintenance of the purification device when the differential pressure value is greater than a first predetermined threshold and the interval period is less than a second predetermined threshold; The output unit outputs the alert information. The management device according to claim 1 .

8. A management method executed by a processor of a management device, comprising: Acquiring a regeneration time, which is the time for which a regeneration process of a purification device installed in an exhaust pipe of an engine of a vehicle is performed, and a differential pressure value, which is the pressure difference before and after the purification device after the regeneration process is performed; storing the regeneration time and the differential pressure value; generating a DPD report including information in which the regeneration times and the differential pressure values ​​are arranged in chronological order based on the stored regeneration times and the differential pressure values; outputting the DPD report; A management method comprising:

9. a management program comprising instructions for execution by a processor of a management device, Acquiring a regeneration time, which is the time during which a regeneration process of a purification device installed in an exhaust pipe of a vehicle engine is performed, and a differential pressure value, which is the difference between pressure values ​​before and after the purification device after the regeneration process is performed; storing the regeneration time and the differential pressure value; generating a DPD report including information in which the regeneration times and the differential pressure values ​​are arranged in chronological order based on the stored regeneration times and the differential pressure values; outputting the DPD report; A management program comprising:

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