Exhaust monitoring system

Abstract

To provide an exhaust gas monitoring system for urging a user to repair a vehicle as soon as possible when there is an abnormality in a component contained in exhaust gas.SOLUTION: The exhaust gas monitoring system includes an exhaust gas purification device that purifies exhaust gas discharged from an engine, a first sensor that detects an amount of nitrogen oxide contained in the exhaust gas that has passed through the exhaust gas purification device, a display device that presents information to a user of the vehicle, and a management device. The management device determines that an abnormality has occurred in the component contained in the exhaust gas when the first sensor detects an amount of nitrogen oxide equal to or greater than a threshold value. In the exhaust gas monitoring system, the management device displays, on a display device, a travelable distance which is a distance until a travel distance after it is determined that an abnormality has occurred reaches a predetermined distance. When the engine is stopped in a state where the travelable distance becomes zero, the management device does not start the engine even if an operation of starting the engine is performed.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an exhaust monitoring system. [Background technology]

[0002] Patent Document 1 discloses an exhaust monitoring system, which measures the amount of NOx (nitrogen oxides) contained in the exhaust gas from an engine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-8849 Summary of the Invention [Problem to be solved by the invention]

[0004] Engine exhaust contains NOx and PM (particulate matter). An exhaust purification device is installed in the engine's exhaust passage. The engine's exhaust is purified by the exhaust purification device, thereby suppressing the emission of NOx and PM. If an abnormality occurs in the components contained in the exhaust due to factors such as a malfunction of the exhaust purification device, it is desirable to take measures as soon as possible to suppress the emission of exhaust with abnormal components. [Means for solving the problem]

[0005] An exhaust monitoring system for solving the above problem is an exhaust monitoring system for a vehicle equipped with an engine. This exhaust monitoring system includes an exhaust purification device that purifies exhaust emitted by the engine, a first sensor that detects the amount of nitrogen oxides contained in the exhaust that has passed through the exhaust purification device, a display device that presents information to a user of the vehicle, and a management device. In this exhaust monitoring system, the management device determines that an abnormality has occurred in a component contained in the exhaust when the first sensor detects an amount of nitrogen oxides equal to or greater than a threshold. In this exhaust monitoring system, the management device displays on the display device a remaining drivable distance, which is the distance until the drivable distance reaches a predetermined distance after determining that the abnormality has occurred. In this exhaust monitoring system, if the engine is stopped when the remaining drivable distance has reached zero, the management device will not start the engine even if an operation to start the engine is performed. [Effects of the Invention]

[0006] The exhaust monitoring system can prompt the user to have the vehicle repaired as soon as possible if an abnormality is detected in the amount of nitrogen oxides contained in the exhaust. Furthermore, if the user ignores the notification and continues to use the vehicle without repairing it, the exhaust monitoring system can prevent the engine from being restarted, thereby preventing exhaust from being emitted from the vehicle. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of an exhaust monitoring system according to one embodiment. [Figure 2] FIG. 2 is a schematic diagram showing the configuration of an exhaust system included in the exhaust monitoring system shown in FIG. [Figure 3] FIG. 3 is a diagram showing the transition of control according to the vehicle travel distance by the exhaust monitoring system shown in FIG. [Figure 4] FIG. 4 is an example of an image displayed on a display device by the exhaust monitoring system shown in FIG. [Figure 5]FIG. 5 is a table showing the transition of images displayed on the display device by the exhaust monitoring system shown in FIG. [Figure 6] FIG. 6 is a flowchart showing a series of processes executed by the management device shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of an exhaust monitoring system will be described below with reference to FIGS. <Configuration of exhaust monitoring system 100> 1, an exhaust monitoring system 100 is applied to a vehicle 10. The exhaust monitoring system 100 includes a display device 11, a management device 12, and an exhaust system 20.

[0009] The display device 11 has a screen for displaying images. The display device 11 presents information to the user of the vehicle 10 by displaying images on the screen. The display device 11 is, for example, a monitor that displays a speedometer in the vehicle 10. The display device 11 may be a head-up display. The display device 11 may be a car navigation monitor or a display audio. The display device 11 may be a multi-information display provided on a meter panel.

[0010] 2, the exhaust system 20 includes an engine 21, an exhaust purification device 22, an exhaust pipe 23, a first sensor 24, and a second sensor 25. The exhaust system 20 is a mechanism that discharges exhaust gas emitted by the engine 21 to the outside of the vehicle 10.

[0011] The engine 21 is a diesel engine. The exhaust pipe 23 is connected to the combustion chamber of the engine 21. The exhaust pipe 23 is connected to the outside of the vehicle 10 at the tip of the dotted arrow in Figure 2. The exhaust emitted by the engine 21 flows through the exhaust pipe 23 in the direction of the dotted arrow in Figure 2. The exhaust passes through the exhaust pipe 23 and is discharged outside the vehicle 10.

[0012] 2, the exhaust purification device 22 is installed in a portion of the exhaust pipe 23 through which exhaust passes. The exhaust purification device 22 purifies the exhaust emitted by the engine 21. The exhaust is purified by passing through the exhaust purification device 22.

[0013] The exhaust purification device 22 is, for example, a diesel oxidation catalyst (DOC) for a diesel engine that oxidizes components in PM (particulate matter). The exhaust purification device 22 may be a diesel particulate filter (DPF) that captures and processes PM contained in exhaust. The exhaust purification device 22 may be a selective catalytic reduction catalyst (SCR) that reduces NOx (nitrogen oxides) in exhaust using ammonia produced by hydrolyzing urea.

[0014] The exhaust monitoring system 100 may include multiple exhaust purification devices 22. For example, the exhaust monitoring system 100 may include three types of exhaust purification devices 22: a diesel engine oxidation catalyst, a diesel particulate filter, and a selective reduction catalyst.

[0015] 2, the first sensor 24 is installed in a portion of the exhaust pipe 23 through which the exhaust gas that has passed through the exhaust purification device 22 passes. While the engine 21 is running, the first sensor 24 detects the amount of NOx contained in the exhaust gas that has passed through the exhaust purification device 22. In other words, the first sensor 24 detects the amount of NOx in the exhaust gas that has been purified by the exhaust purification device 22.

[0016] 2, the second sensor 25 is installed in a portion of the exhaust pipe 23 through which the exhaust gas that has passed through the exhaust purification device 22 passes. While the engine 21 is running, the second sensor 25 detects the amount of PM contained in the exhaust gas that has passed through the exhaust purification device 22. In other words, the second sensor 25 detects the amount of PM in the exhaust gas purified by the exhaust purification device 22.

[0017] 2, the first sensor 24 is disposed closer to the exhaust purification device 22 than the second sensor 25. The second sensor 25 may be disposed closer to the exhaust purification device 22 than the first sensor 24. Furthermore, the first sensor 24 and the second sensor 25 may be disposed side by side in the exhaust pipe 23 so that the distance between the first sensor 24 and the exhaust purification device 22 and the distance between the second sensor 25 and the exhaust purification device 22 are the same.

[0018] The management device 12 is, for example, an electronic control device provided in the vehicle 10. The management device 12 is connected to the first sensor 24 and the second sensor 25, and acquires detection values ​​from the first sensor 24 and the second sensor 25. The management device 12 determines whether an abnormality has occurred in the components contained in the exhaust gas by acquiring the detection values ​​from the first sensor 24 and the second sensor 25. A threshold value is set in advance for the amount of NOx detected by the first sensor 24. A threshold value is also set in advance for the amount of PM detected by the second sensor 25. The management device 12 determines that an abnormality has occurred in the components contained in the exhaust gas when the detection value of at least one of the first sensor 24 and the second sensor 25 is equal to or greater than the threshold value.

[0019] The management device 12 is connected to the display device 11 and the engine 21 and is capable of controlling the display device 11 and the engine 21. When the management device 12 determines that an abnormality has occurred in a component contained in the exhaust, the management device 12 controls the display device 11 and the engine 21 according to the distance traveled by the vehicle 10 after determining that the abnormality has occurred.

[0020] <Control of the display device 11 and the engine 21 by the management device 12> 3 shows the distance traveled by the vehicle 10 after the management device 12 determines that an abnormality has occurred in the components contained in the exhaust. The management device 12 calculates the distance traveled by the vehicle 10 after determining that an abnormality has occurred, for example, based on the number of rotations of the wheels of the vehicle 10.

[0021] In Fig. 3, the starting point of the arrow indicates the point where management device 12 determines that an abnormality has occurred in a component contained in the exhaust. In Fig. 3, the further away from the starting point of the arrow in the direction of the arrow, the longer the travel distance of vehicle 10.

[0022] In the exhaust monitoring system 100, a reference distance is determined in advance for the management device 12 to control the display device 11 and the engine 21. As shown in Fig. 3, in the exhaust monitoring system 100, a first distance, a second distance, a third distance, and a default distance are determined in advance as the reference distances.

[0023] The longest of the reference distances is the predetermined distance. In this embodiment, the predetermined distance is 2800 km. The first distance is a distance less than the predetermined distance. In this embodiment, the first distance is 400 km. The second distance is a distance longer than the first distance and less than the predetermined distance. The third distance is a distance longer than the second distance and less than the predetermined distance. In this way, the reference distances become longer in the order of the first distance, the second distance, the third distance, and the predetermined distance.

[0024] 3, after management device 12 determines that an abnormality has occurred in a component contained in exhaust, when the travel distance of vehicle 10 becomes equal to or greater than a first distance, management device 12 starts displaying a warning on display device 11. On the other hand, management device 12 does not display a warning on display device 11 while the travel distance of vehicle 10 is less than the first distance. In this way, even if management device 12 determines that an abnormality has occurred in a component contained in exhaust, it does not immediately display a warning on display device 11.

[0025] 4 shows an example of a warning display 30, which is a warning image displayed on the display device 11 by the management device 12. As shown in FIG. 4, the warning display 30 is made up of a distance display section 31 and a message display section 32.

[0026] The distance display unit 31 displays the remaining driving distance. The remaining driving distance is the distance traveled from when the management device 12 determines that an abnormality has occurred in the components contained in the exhaust until the distance reaches a predetermined distance. The remaining driving distance becomes shorter as the distance traveled by the vehicle 10 from when the management device 12 determines that an abnormality has occurred in the components contained in the exhaust increases. In other words, the distance display unit 31 displays a countdown of the remaining driving distance until the distance traveled by the vehicle 10 from when the management device 12 determines that an abnormality has occurred in the components contained in the exhaust until the distance reaches the predetermined distance.

[0027] The message display unit 32 displays a warning message for the user of the vehicle 10. The message displayed by the message display unit 32 may be an image instead of text. The warning has four display modes, from the first display mode to the fourth display mode. The higher the display mode, the stronger the urging to repair the vehicle 10. The four display modes are in the order of lowest to highest, from the first display mode, the second display mode, the third display mode, and the fourth display mode.

[0028] For example, the color of the message changes depending on the level of the display mode. For example, the higher the level of the display mode, the more frequently the message is displayed. For example, as the level of the display mode increases, the message begins to flash. For example, as the level of the display mode increases, a sound is played along with the text or image.

[0029] There are four levels of messages, from level 1 to level 4. The higher the level of the message display, the higher the level of the message. The four levels of messages are ranked in order from lowest to highest: level 1, level 2, level 3, and level 4. For example, the higher the level of the four-level message, the stronger the text content becomes, encouraging repairs.

[0030] As shown in FIG. 3, when the distance traveled since it was determined that an abnormality has occurred in the components contained in the exhaust gas is equal to or greater than a first distance and less than a second distance, the management device 12 displays a warning in a first display mode on the display device 11.

[0031] FIG. 5 shows types of warning display modes that the management device 12 displays on the display device 11, and an explanation of the display content of each type in this embodiment. 5, in the warning in the first display mode, the management device 12 displays the remaining driving distance on the distance display unit 31. In addition, in the warning in the first display mode, the management device 12 displays the first stage message on the message display unit 32.

[0032] As shown in FIG. 3, the management device 12 displays a warning in the second display mode on the display device 11 when the mileage since it was determined that an abnormality has occurred in the components contained in the exhaust is equal to or greater than a second distance and less than a third distance.

[0033] 5, in the warning in the second display mode, the management device 12 displays the remaining driving distance on the distance display unit 31. In addition, in the warning in the second display mode, the management device 12 displays a second level message on the message display unit 32.

[0034] As shown in FIG. 3, the management device 12 displays a warning in a third display mode on the display device 11 when the distance traveled since it was determined that an abnormality had occurred in the components contained in the exhaust gas is equal to or greater than a third distance and less than a predetermined distance.

[0035] 5, in the warning in the third display mode, the management device 12 displays the remaining driving distance on the distance display unit 31. In addition, in the warning in the third display mode, the management device 12 displays a third level message on the message display unit 32.

[0036] If the mileage after it is determined that an abnormality has occurred in the components contained in the exhaust gas exceeds a predetermined distance, the remaining mileage becomes zero. As shown in Fig. 3, when the remaining mileage becomes zero, the management device 12 does not permit the engine 21 to be restarted after the ignition switch is turned off (IG-OFF). In other words, when the engine 21 is stopped with the remaining mileage becoming zero, the management device 12 prohibits the restart of the engine 21, and does not start the engine 21 even if an operation to start the engine 21 is performed.

[0037] Furthermore, as shown in FIG. 3, when the distance traveled since it was determined that an abnormality has occurred in the components contained in the exhaust gas is equal to or greater than a predetermined distance, the management device 12 displays a warning in a fourth display mode on the display device 11.

[0038] 5, in the warning of the third display mode, the management device 12 displays a fourth-level message on the message display unit 32. For example, the management device 12 strongly urges the user to repair the vehicle 10 by displaying, as the fourth-level message, a message indicating that the engine 21 cannot be restarted after the ignition switch of the vehicle 10 is turned off.

[0039] <Processing Executed by Management Device 12> 6 shows a series of processes executed by the management device 12 in the exhaust monitoring system 100. The management device 12 executes the series of processes shown in FIG. 6 while the engine 21 is running.

[0040] In the process of step S11, the management device 12 executes a determination process. In the determination process, the management device 12 acquires detection values ​​from the first sensor 24 and the second sensor 25, and then determines whether or not there is an abnormality in the components contained in the exhaust gas based on the acquired detection values.

[0041] As described above, a threshold value is set in advance for the amount of NOx detected by the first sensor 24. A threshold value is also set in advance for the amount of PM detected by the second sensor 25. The management device 12 determines that an abnormality has occurred in the components contained in the exhaust gas when the detection value of at least one of the first sensor 24 and the second sensor 25 is equal to or greater than the threshold value. On the other hand, the management device 12 determines that no abnormality has occurred in the components contained in the exhaust gas when the detection values ​​of both the first sensor 24 and the second sensor 25 are less than the threshold value.

[0042] In the next step S12, the management device 12 determines whether or not an abnormality has occurred in the components contained in the exhaust gas based on the determination process of step S11. If the management device 12 determines based on the determination process of step S11 that there is no abnormality in the components contained in the exhaust gas (step S12: NO), it ends the series of processes shown in Fig. 6. If the management device 12 determines based on the determination process of step S11 that there is an abnormality in the components contained in the exhaust gas (step S12: YES), it proceeds to step S13.

[0043] In the process of step S13, the management device 12 determines whether the distance traveled by the vehicle 10 since it was determined that an abnormality had occurred in the components contained in the exhaust gas is equal to or greater than a first distance. If the management device 12 determines that the travel distance of the vehicle 10 is less than the first distance (step S13: NO), it performs the processes of steps S11 and S12 again. That is, the management device 12 repeats the determination process and the process of confirming the result of the determination process until the travel distance of the vehicle 10 becomes equal to or greater than the first distance. Even after once determining that there is an abnormality in the components contained in the exhaust, if the management device 12 determines that there is no abnormality based on the result of the determination process performed while the travel distance of the vehicle 10 is less than the first distance, it ends the series of processes shown in FIG.

[0044] If the management device 12 determines that the travel distance of the vehicle 10 is equal to or greater than the first distance (step S13: YES), the management device 12 proceeds to step S14. In the processing of step S14, the management device 12 displays a warning on the display device 11 in a first display mode.

[0045] At this time, for example, after determining that the travel distance of the vehicle 10 is equal to or greater than the first distance, the management device 12 starts displaying in the first display mode after the engine 21 of the vehicle 10 is stopped and restarted. The management device 12 may start displaying in the first display mode immediately after determining that the travel distance of the vehicle 10 is equal to or greater than the first distance.

[0046] In the next step S15, the management device 12 determines whether the distance traveled by the vehicle 10 since it was determined that an abnormality had occurred in the components contained in the exhaust gas is equal to or greater than a second distance.

[0047] If the management device 12 determines that the travel distance of the vehicle 10 is less than the second distance (step S15: NO), the management device 12 repeats the process of step S15. If the management device 12 determines that the travel distance of the vehicle 10 is equal to or greater than the second distance (step S15: YES), the management device 12 proceeds to step S16. In the processing of step S16, the management device 12 displays a warning on the display device 11 in the second display mode.

[0048] At this time, for example, after determining that the travel distance of the vehicle 10 is equal to or greater than the second distance, the management device 12 starts displaying in the second display mode after the engine 21 of the vehicle 10 is stopped and restarted. The management device 12 may start displaying in the second display mode immediately after determining that the travel distance of the vehicle 10 is equal to or greater than the second distance.

[0049] In the next step S17, the management device 12 determines whether the distance traveled by the vehicle 10 since it was determined that an abnormality had occurred in the components contained in the exhaust gas is equal to or greater than a third distance.

[0050] If the management device 12 determines that the travel distance of the vehicle 10 is less than the third distance (step S17: NO), the management device 12 repeats the process of step S17. If the management device 12 determines that the travel distance of the vehicle 10 is equal to or greater than the third distance (step S17: YES), the management device 12 proceeds to step S18. In the processing of step S18, the management device 12 displays a warning on the display device 11 in a third display mode.

[0051] At this time, for example, after determining that the travel distance of the vehicle 10 is equal to or greater than the third distance, the management device 12 starts displaying in the third display mode after the engine 21 of the vehicle 10 is stopped and restarted. The management device 12 may start displaying in the third display mode immediately after determining that the travel distance of the vehicle 10 is equal to or greater than the third distance.

[0052] In the next step S19, the management device 12 determines whether the distance traveled by the vehicle 10 since it was determined that an abnormality had occurred in the components contained in the exhaust gas is equal to or greater than a predetermined distance.

[0053] If the management device 12 determines that the travel distance of the vehicle 10 is less than the predetermined distance (step S19: NO), the management device 12 repeats the process of step S19. If the management device 12 determines that the travel distance of the vehicle 10 is equal to or greater than the predetermined distance (step S19: YES), the processing proceeds to step S20. In the processing of step S20, the management device 12 displays a warning in the fourth display mode on the display device 11. At this time, the management device 12 starts displaying in the fourth display mode immediately after determining that the travel distance of the vehicle 10 is equal to or greater than the predetermined distance.

[0054] In the next step S21, the management device 12 stores information that restarting of the engine 21 is prohibited after the ignition switch of the vehicle 10 is turned off. Note that the order in which the steps S20 and S21 are performed may be reversed.

[0055] In the processing from step S14 onwards, the management device 12 starts displaying a warning on the display device 11. When the vehicle 10 is repaired and the abnormality in the components contained in the exhaust is resolved, the exhaust monitoring system 100 erases the warning display and ends the series of processing shown in Fig. 6. For example, when the exhaust purification device 22, the first sensor 24, or the second sensor 25 is repaired, the exhaust monitoring system 100 erases the warning display and ends the series of processing shown in Fig. 6.

[0056] If the vehicle 10 is repaired while a warning in the first display mode is being displayed, the exhaust monitoring system 100 erases the warning in the first display mode and ends the series of processes shown in Fig. 6. If the vehicle 10 is repaired while a warning in the second display mode is being displayed, the exhaust monitoring system 100 erases the warning in the second display mode and ends the series of processes shown in Fig. 6. If the vehicle 10 is repaired while a warning in the third display mode is being displayed, the exhaust monitoring system 100 erases the warning in the third display mode and ends the series of processes shown in Fig. 6. If the vehicle 10 is repaired while a warning in the fourth display mode is being displayed, the exhaust monitoring system 100 erases the warning in the fourth display mode and ends the series of processes shown in Fig. 6.

[0057] Even if the exhaust monitoring system 100 memorizes in the processing of step S21 that restarting of the engine 21 is prohibited, if the vehicle 10 is repaired and the abnormality in the components contained in the exhaust is resolved, the prohibition on restarting of the engine 21 is lifted.

[0058] 6 is terminated due to the vehicle 10 being repaired, for example, when the vehicle 10 is repaired, the repairman of the vehicle 10 resets the settings of the management device 12, thereby terminating the series of processes shown in Fig. 6. Note that the management device 12 may terminate the series of processes shown in Fig. 6 upon detecting that the vehicle 10 has been repaired.

[0059] <Operation of this embodiment> If an abnormality is found in the amount of nitrogen oxides contained in the exhaust, the exhaust monitoring system 100 notifies the user of the vehicle 10 of the remaining driving distance. If the vehicle 10 continues to be driven without being repaired even after the remaining driving distance reaches zero, the exhaust monitoring system 100 prevents the engine 21 from being restarted.

[0060] <Effects of this embodiment> (1) If an abnormality is detected in the amount of nitrogen oxides contained in the exhaust, the exhaust monitoring system 100 can prompt the user to repair the vehicle 10 as soon as possible. Furthermore, if the user ignores the notification and continues to use the vehicle 10 without repairing it, the exhaust monitoring system 100 can prevent the engine 21 from being restarted, thereby preventing exhaust from being emitted from the vehicle 10.

[0061] (2) The exhaust monitoring system 100 includes a second sensor 25 that detects the amount of particulate matter contained in the exhaust gas that has passed through the exhaust purification device 22. In the exhaust monitoring system 100, the management device 12 also determines that an abnormality has occurred when the second sensor 25 detects an amount of particulate matter that is equal to or greater than a threshold value.

[0062] If an abnormality is found in the amount of particulate matter contained in the exhaust, the exhaust monitoring system 100 notifies the user of the vehicle 10 of the remaining driving distance. Thereafter, if the vehicle 10 continues to be driven without being repaired even after the remaining driving distance reaches zero, the exhaust monitoring system 100 prevents the engine 21 from being restarted. In this way, if an abnormality is found in the amount of particulate matter contained in the exhaust, the exhaust monitoring system 100 can urge the user to repair the vehicle 10 as soon as possible. Furthermore, if the user ignores the notification and continues to use the vehicle 10 without repairing it, the exhaust monitoring system 100 prevents the engine 21 from being restarted, thereby preventing exhaust from being emitted from the vehicle 10.

[0063] (3) In the exhaust monitoring system 100, a first distance, which is a distance less than the predetermined distance, is predetermined. In the exhaust monitoring system 100, the management device 12 starts displaying the remaining driving distance on the display device 11 when the driving distance reaches or exceeds the first distance while the abnormality is not resolved.

[0064] An abnormality in the exhaust gas components detected by the sensor may be resolved without repair. Exhaust gas monitoring system 100 does not immediately display the remaining driving distance when it determines that an abnormality has occurred, but instead begins displaying the remaining driving distance when the abnormality has not been resolved even after the driving distance after the determination reaches a first distance or more. This allows exhaust gas monitoring system 100 to avoid notifying the remaining driving distance if the abnormality in the exhaust gas components is resolved immediately.

[0065] (4) In the exhaust monitoring system 100, the first distance is 400 km and the predetermined distance is 2800 km. As a result, the exhaust monitoring system 100 can prohibit restarting of the engine 21 if the vehicle has traveled a distance of 2800 km or more after determining that an abnormality exists in the exhaust components.

[0066] (5) In the exhaust monitoring system 100, a second distance that is longer than the first distance and shorter than a predetermined distance, and a third distance that is longer than the second distance and shorter than the predetermined distance are predetermined. In the exhaust monitoring system 100, the management device 12 displays a warning in a first display mode on the display device 11 when the distance traveled since it is determined that an abnormality has occurred is equal to or greater than the first distance and shorter than the second distance. In the exhaust monitoring system 100, the management device 12 displays a warning in a second display mode, which is different from the first display mode, on the display device 11 when the distance traveled since it is determined that an abnormality has occurred is equal to or greater than the second distance and shorter than the third distance. In the exhaust monitoring system 100, the management device 12 displays a warning in a third display mode, which is different from the first and second display modes, on the display device 11 when the distance traveled since it is determined that an abnormality has occurred is equal to or greater than the third distance and shorter than the predetermined distance. In the exhaust monitoring system 100, when the distance traveled since it is determined that an abnormality has occurred is equal to or greater than a predetermined distance, the management device 12 displays a warning in a fourth display mode, which is different from the first, second, and third display modes, on the display device 11.

[0067] After determining that an abnormality exists in the exhaust components, if the user ignores the warning and continues to use the vehicle 10 without repairing it, the exhaust monitoring system 100 presents the user with gradually changing information displayed on the display device 11. In this way, the exhaust monitoring system 100 can gradually notify the user who does not repair the vehicle 10 that the drivable distance is becoming shorter.

[0068] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0069] In the above embodiment, the engine 21 is a diesel engine. The engine 21 may be a gasoline engine. In the above embodiment, the DOC, DPF, and SCR are exemplified as the exhaust purification device 22. However, the exhaust purification device 22 that the exhaust monitoring system 100 may have is not limited to the above-exemplified devices. For example, the exhaust purification device 22 may be a GPF (Gasoline Particulate Filter) that captures PM in the exhaust gas.

[0070] In the above embodiment, the exhaust monitoring system 100 includes the second sensor 25. The exhaust monitoring system 100 does not have to include the second sensor 25. In this case, the management device 12 does not determine whether or not there is an abnormality in the components contained in the exhaust based on the amount of PM contained in the exhaust.

[0071] In the above embodiment, the first distance is predetermined. In the exhaust monitoring system 100, the first distance does not have to be predetermined. In this case, when the management device 12 determines that an abnormality has occurred in a component contained in the exhaust, it displays a warning on the display device 11 without waiting for the traveling distance of the vehicle 10 to reach or exceed the first distance. In this case, the predetermined distance may be 2400 km instead of 2800 km.

[0072] In the above embodiment, the management device 12 does not display a warning on the display device 11 while the travel distance of the vehicle 10 is less than the first distance. The management device 12 may display a warning on the display device 11 when the travel distance of the vehicle 10 is less than the first distance.

[0073] In the above embodiment, the first distance is 400 km. The first distance does not have to be 400 km. Also, in the above embodiment, the predetermined distance is 2800 km. The predetermined distance does not have to be 2800 km.

[0074] In the above embodiment, the second distance and the third distance are defined. The second distance and the third distance do not necessarily have to be defined. In the above embodiment, the management device 12 changes the mode of the warning display 30 from the first display mode to the second display mode, the third display mode, and the fourth display mode as the distance traveled by the vehicle 10 after determining that an abnormality has occurred increases. The management device 12 does not have to change the mode of the warning display 30.

[0075] Furthermore, the types of modes of the warning display 30 are not limited to the above four types, but may be three or less, or five or more. In the above embodiment, the management device 12 changes the message in stages according to the stage of the display mode. The management device 12 does not have to change the message.

[0076] In the above embodiment, there are messages up to level 4. The maximum message level may be level 3 or lower, or level 5 or higher. In the exhaust monitoring system 100, the manner of the warning displayed by the display device 11 on the warning display 30 is not limited to the above embodiment. For example, the display device 11 may display the remaining driving distance on the distance display unit 31, but may not display a message on the message display unit 32. [Explanation of symbols]

[0077] 10...vehicle, 11...display device, 12...management device, 20...exhaust system, 21...engine, 22...exhaust purification device, 23...exhaust pipe, 24...first sensor, 25...second sensor, 30...warning display, 31...distance display unit, 32...message display unit, 100...exhaust monitoring system

Claims

1. An exhaust monitoring system for a vehicle having an engine, an exhaust purification device that purifies exhaust gas emitted by the engine; a first sensor for detecting the amount of nitrogen oxides contained in the exhaust gas that has passed through the exhaust gas purification device; a display device for presenting information to a user of the vehicle; a management device, The management device When the first sensor detects the nitrogen oxides in an amount equal to or greater than a threshold value, it is determined that an abnormality has occurred in the components contained in the exhaust gas, a travelable distance, which is the distance from when it is determined that the abnormality has occurred until the travelable distance reaches a predetermined distance, is displayed on the display device; If the engine is stopped when the remaining driving distance is zero, the engine will not be started even if an operation to start the engine is performed. Exhaust monitoring system.

2. a second sensor that detects the amount of particulate matter contained in the exhaust gas that has passed through the exhaust gas purification device; The management device When the second sensor detects the particulate matter in an amount equal to or greater than a threshold, it is determined that the abnormality has occurred.

10. The exhaust monitoring system of claim 1.

3. a first distance that is less than the predetermined distance is predetermined; The management device When the traveled distance becomes equal to or greater than the first distance while the abnormality is not resolved, the display device starts displaying the remaining traveled distance.

3. An exhaust monitoring system according to claim 1 or 2.

4. the first distance is 400 km; The predetermined distance is 2800 km.

4. The exhaust monitoring system of claim 3.

5. a second distance that is greater than the first distance and less than the predetermined distance; a third distance that is longer than the second distance and less than the predetermined distance is predetermined; The management device When the traveling distance since it is determined that the abnormality has occurred is equal to or greater than the first distance and less than the second distance, a warning is displayed on the display device in a first display manner; When the traveling distance since it is determined that the abnormality has occurred is equal to or greater than the second distance and less than the third distance, a warning is displayed on the display device in a second display mode that is different from the first display mode, when the traveling distance since it is determined that the abnormality has occurred is equal to or greater than the third distance and is less than the predetermined distance, a warning is displayed on the display device in a third display mode that is different from the first display mode and the second display mode, When the travel distance since it is determined that the abnormality has occurred is equal to or greater than the predetermined distance, a warning in a fourth display mode, which is different from the first display mode, the second display mode, and the third display mode, is displayed on the display device.

4. The exhaust monitoring system of claim 3.

Images