JP6435641B2 - Management system - Google Patents

Description

  The present invention relates to a management system, and more particularly to management of a vehicle equipped with an exhaust purification device equipped with a filter (hereinafter referred to as DPF) that collects particulate matter (hereinafter referred to as PM) in exhaust discharged from an internal combustion engine. About the system.

  Conventionally, a system has been developed that improves operation management by transmitting operation data of each vehicle to a management terminal such as a carrier that owns a plurality of vehicles to notify the operation status (for example, patents) Reference 1).

  Generally, a vehicle such as a truck owned by a carrier is equipped with an exhaust purification device equipped with a DPF. Since the DPF has a limit in the amount of collected PM, it is necessary to perform so-called forced regeneration in which accumulated PM is periodically burned and removed (see, for example, Patent Document 2).

JP 2003-044976 A JP 2010-203297 A

  By the way, when a failure occurs due to deterioration, clogging, or the like in the DPF, the vehicle becomes unable to travel, which may affect the operation of the carrier. In order to avoid such an influence in advance, it is necessary to perform maintenance or the like by placing the vehicle in the vehicle before the failure occurs in the DPF. That is, it is preferable to notify a manager, a driver, or the like as a report when the function of the DPF shows a downward trend.

  The objective of this invention is providing the management system which can aim at the improvement of operation by notifying the function fall tendency of DPF suitably.

In order to achieve the above object, a management system according to the present invention collects particulate matter in exhaust gas discharged from an internal combustion engine, and exhaust purification having a filter that can be regenerated by combustion removal of accumulated particulate matter. A vehicle-side terminal device mounted on the vehicle, and a management-side terminal that is connected to the vehicle-side terminal device via a network and can be installed in a different place from the vehicle A reproduction information acquisition unit that acquires the reproduction information of the filter, and a transmission unit that transmits the reproduction information acquired by the reproduction information acquisition unit via the network, And the management-side terminal device receives the reproduction information transmitted from the transmission unit, and based on the reproduction information acquired by the reproduction information acquisition unit, A reproduction condition diagnosis unit raw state to diagnose whether the decline, wherein the notification unit that notifies the diagnosis result of the reproduction status diagnostic section, the playback information acquisition unit includes a reproduction information relating to AutoPlay The reproduction status diagnosis unit diagnoses whether or not the collection function of the filter tends to be lowered based on a reproduction interval from the end of automatic reproduction to the start of the next automatic reproduction. In addition, the reproduction information related to the automatic reproduction acquired by the reproduction information acquisition unit and the reproduction information related to the manual reproduction are distinguished and used for diagnosis.

  The reproduction state diagnosing unit may diagnose whether or not the reproduction function of the filter tends to decrease based on the occurrence frequency of reproduction incomplete with respect to reproduction completion.

  The reproduction state diagnosing unit may diagnose whether or not the automatic reproduction function tends to decrease based on the frequency of manual reproduction.

  The regeneration state diagnosis unit may diagnose whether or not the particulate matter combustion removal function at the time of regeneration tends to decrease based on the frequency of occurrence of regeneration failure and the frequency of execution of manual regeneration.

  The notification unit may notify that the maintenance is recommended together with the diagnosis result when the reproduction state diagnosis unit diagnoses the decrease tendency.

  The regeneration state diagnosing unit diagnoses whether the combustion removal efficiency of particulate matter during regeneration tends to decrease based on the frequency of occurrence of regeneration interruption during execution of automatic regeneration or manual regeneration, and the notification unit When the regeneration state diagnosis unit diagnoses that there is a tendency to decrease, it may notify that the execution of manual regeneration is recommended together with the diagnosis result.

  According to the management system of the present invention, it is possible to improve the operation by appropriately notifying the DPF functional decline tendency.

1 is a schematic diagram of a vehicle to which a management system according to an embodiment of the present invention is applied. It is a schematic diagram of a management system concerning one embodiment of the present invention. Regarding the PM collection function diagnosis of the present embodiment, (A) illustrates an example in which the function is good, and (B) illustrates an example in which the function has a tendency to decrease. Regarding the DPF regeneration function diagnosis of the present embodiment, (A) illustrates an example of a state in which the function is good, and (B) illustrates an example in which the function is declining. It is a figure explaining an example in which the function shows a decreasing tendency about automatic reproduction function diagnosis of this embodiment. It is a figure explaining an example in which the function shows a decreasing tendency about PM oxidation removal function diagnosis of this embodiment. It is a figure explaining an example which shows the tendency for the efficiency concerned about PM oxidation efficiency diagnosis of this embodiment.

  Hereinafter, based on an accompanying drawing, a management system concerning one embodiment of the present invention is explained.

  FIG. 1 is a schematic diagram of a vehicle 1 to which the management system of the present embodiment is applied. An exhaust purification device 10 provided in the exhaust passage 3 of the engine 2 is mounted on the vehicle 1. The exhaust purification device 10 includes a fuel injection device 11, an oxidation catalyst (hereinafter referred to as DOC) 12, an exhaust temperature sensor 13, a DPF 14, a differential pressure sensor 15 and the like in order from the exhaust upstream side.

  The fuel injection device 11 injects unburned fuel (mainly HC) into the exhaust passage 3 in response to an instruction signal input from the ECU. In addition, when using the post injection by the multistage injection of the engine 2, this fuel injection device 11 may be omitted. When HC is supplied by the fuel injection device 11 or post injection, the DOC 12 oxidizes this and raises the exhaust gas temperature. The DPF 14 collects PM in the exhaust gas on the surface of the partition wall, and when the amount of accumulated PM reaches a predetermined amount, so-called forced regeneration is performed to remove the PM. The forced regeneration is performed by supplying unburned fuel to the DOC 12 by the fuel injection device 11 or post injection, and raising the exhaust temperature flowing into the DPF 14 to the PM combustion temperature.

  The exhaust emission control device 10 of the present embodiment is configured to be able to execute “automatic regeneration” and “manual regeneration” as forced regeneration. Automatic regeneration refers to when the travel distance of the vehicle 1 reaches a predetermined distance, when the differential pressure across the DPF detected by the differential pressure sensor 15 reaches a predetermined threshold, or when various sensors detect the regeneration timing of the DPF 14. A playback that starts automatically in some cases. Manual regeneration refers to regeneration started when the vehicle 1 is stopped and the driver turns on an operation button (not shown). In this manual regeneration, the manual regeneration mark M blinks on the display panel of the cab and the driver is prompted to perform manual regeneration, and the manual regeneration mark M is not blinking. Any manual regeneration that is performed is included.

  FIG. 2 shows a schematic diagram of the management system of the present embodiment. The management system includes a vehicle-side terminal device 20 mounted on the vehicle 1 and a management-side terminal device 40 installed at a location different from the vehicle 1 (for example, a management-side office or the like). The vehicle-side terminal device 20 and the management-side terminal device 40 are connected so as to be capable of wireless communication via a network N such as a mobile phone line. A base station (not shown) that functions as a server may be provided between the vehicle-side terminal device 20 and the management-side terminal device 40. In this case, the base station and the management-side terminal device 40 may be connected via the Internet or the like, and data may be transmitted from the base station in response to a request from the management-side terminal device 40.

  The vehicle-side terminal device 20 includes a reproduction information acquisition / storage unit 21 and a data transmission unit 22. In the illustrated example, only one vehicle 1 is shown. However, when managing a plurality of vehicles, the vehicle-side terminal device 20 may be mounted for each vehicle.

  The reproduction information acquisition / storage unit 21 acquires and stores the reproduction information shown in (1) to (6) below as data. (1) Travel distance of vehicle 1 where automatic / manual regeneration is started, (2) regeneration time required for automatic regeneration / manual regeneration, (3) regeneration completion of automatic regeneration / manual regeneration, (4) automatic regeneration / manual Incomplete playback, (5) Automatic / manual playback pause, (6) PM removal error.

  The completion of regeneration means, for example, a case where the DPF inlet temperature can be maintained at the PM combustion temperature or higher for a predetermined period required for PM combustion removal during the execution period of automatic regeneration or manual regeneration. Regeneration incomplete means, for example, a case where the DPF inlet temperature cannot be maintained at the PM combustion temperature or higher for a predetermined period required for PM combustion removal during the execution period of automatic regeneration or manual regeneration. The reproduction interruption is a case where reproduction is temporarily interrupted by an ignition key OFF operation, idling stop or the like during execution of automatic reproduction or manual reproduction. The PM removal error refers to a case where the differential pressure across the DPF at the end of automatic regeneration or at the end of manual regeneration is greater than or equal to a predetermined threshold value and regeneration of the DPF 14 has failed.

  The data transmission unit 22 wirelessly transmits various reproduction information data stored in the reproduction information acquisition / storage unit 21. The timing for transmitting the reproduction information data can be arbitrarily set. For example, the reproduction information data may be transmitted once or several times a day, or may be transmitted in real time.

  The management-side terminal device 40 includes a data reception unit 41 that receives reproduction information data transmitted from the data transmission unit 22, a reproduction state diagnosis unit 42 that performs various diagnoses, and a notification unit 43 that reports diagnosis results. Yes.

  Based on the reproduction information data received by the data receiving unit 41, the reproduction state diagnosis unit 42 performs various function diagnosis of the PM collection function, the DPF regeneration function, the automatic regeneration function, the PM oxidation removal function, and the PM oxidation efficiency. To do. Details of each of these diagnostic items will be described below. The “decreasing tendency” used for diagnosis means a state before the DPF 14 fails.

[PM collection function diagnosis]
The PM collection function is diagnosed based on a travel distance from the end of automatic regeneration to the start of the next automatic regeneration (hereinafter referred to as a regeneration interval). For example, as shown in FIG. 3A, when the average value of the reproduction intervals for the latest 10 times is equal to or greater than the normal interval, the PM collection function is diagnosed as “good”.

  On the other hand, as shown in FIG. 3B, when the average value of the reproduction intervals for the latest 10 times is continuously shorter than the normal interval, the PM trapping function is diagnosed as “decreasing tendency”. This is because it is considered that the PM trapping function of the DPF 14 is significantly lowered due to the accumulation of ash. Note that if any manual regeneration is executed during the last 10 automatic regenerations, recovery of the PM collection function is expected, so it may be excluded from the diagnosis.

[DPF regeneration function diagnosis]
The DPF regeneration function is diagnosed based on whether or not the frequency of uncompleted regeneration with respect to regeneration completion has increased in the most recent automatic regeneration (including manual regeneration). For example, as shown in FIG. 4A, the DPF regeneration function is “good” when regeneration incomplete has occurred n times (where n <10) or less in the last 10 automatic regenerations or manual regenerations. Is diagnosed.

  On the other hand, as shown in FIG. 4B, in the last 10 automatic regenerations or manual regenerations, when incomplete regeneration has occurred n times or more (however, n <10), the DPF regeneration function is “ Diagnosed as “declining trend”. This is because there is a possibility that the exhaust temperature has not been raised to the PM combustion temperature due to the deterioration of the DOC 12 or that the in-pipe injection cannot be performed due to the malfunction of the fuel injection device 11 or the like. It should be noted that in the most recent five automatic regenerations or manual regenerations, if regeneration incomplete has not occurred, recovery of the DPF regeneration function is expected, so it may be excluded from the diagnosis.

[Automatic playback function diagnosis]
The automatic reproduction function is diagnosed based on the frequency of manual reproduction executed when the manual reproduction mark M blinks in the most recent reproductions. For example, as shown in FIG. 5, when the manual regeneration performed when the manual regeneration mark M blinks more than n times (however, n <10) among the 10 most recent regenerations, the automatic regeneration function is Diagnosed as “trend”. This is because it is considered that PM regeneration is not promoted even by automatic regeneration, and manual regeneration is frequently prompted by blinking of the manual regeneration mark M. On the other hand, when the condition is not satisfied, the automatic reproduction function is diagnosed as “good”.

[PM oxidation removal function diagnosis]
The PM oxidation removal function is diagnosed based on the frequency of occurrence of PM removal errors and the frequency of manual regeneration executed when the manual regeneration mark M blinks. For example, as shown in FIG. 6, when the PM removal error has occurred n times (however, n <10) and manual regeneration has been performed n times (where n <10) during the last 10 times of playback. The PM oxidation function is diagnosed as “decreasing tendency”. This is because it is considered that oxidation removal of the soot component has hardly progressed even if automatic regeneration or manual regeneration is performed. On the other hand, when the condition is not satisfied, the PM oxidation removal function is diagnosed as “good”.

[PM oxidation efficiency diagnosis]
The PM oxidation efficiency is diagnosed based on the occurrence frequency of regeneration interruption during execution of automatic regeneration or manual regeneration. For example, as shown in FIG. 7, when regeneration interruption occurs three times or more per one automatic regeneration (or manual regeneration), the PM oxidation efficiency at the time of the regeneration is diagnosed as “decreasing tendency”. This is because the temperature rise of the DPF 14 does not proceed due to frequent interruptions, and it is considered that the PM oxidation efficiency is reduced. On the other hand, when the condition is not satisfied, the PM oxidation efficiency is diagnosed as “good”.

  The notification unit 43 notifies each diagnosis result executed by the reproduction state diagnosis unit 42 as a report. For example, an item diagnosed as “good” is displayed as such, and an item diagnosed as “declining trend” is displayed as such. In addition, when there is an item diagnosed as “declining trend”, it is also displayed that maintenance by warehousing is required. More specifically, if any of the PM collection function, DPF regeneration function, automatic regeneration function, and PM oxidation removal function is diagnosed as “decreasing trend”, it is recommended that the vehicle be inspected for maintenance. Message is displayed. Further, when it is diagnosed that the PM oxidation efficiency tends to decrease, a message indicating that any manual regeneration performed by stopping the vehicle 1 is recommended is displayed. The report notification method may be either screen display by the display device 44 or paper output by the printing unit 45.

  Next, the effect of the management system according to the present embodiment will be described.

  In the present embodiment, various functions of the DPF 14 (PM collection function, DPF regeneration function, automatic regeneration function, PM oxidation removal function, and PM oxidation efficiency) are diagnosed based on the regeneration information data of the DPF 14 transmitted from the vehicle 1. Is done. When these various functions are diagnosed as “decreasing tendency” before the failure, it is notified that maintenance is recommended along with the diagnosis result. That is, it becomes possible for the administrator and the driver to grasp the time when the vehicle 1 needs to be inspected, such as the maintenance time of the DPF 14, before the occurrence of the failure, and the operation management can be improved with certainty.

  In addition, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably and can implement.

  For example, in the above-described embodiment, the vehicle 1 has been described as a truck. However, the vehicle 1 can be widely applied to other vehicles such as a passenger car and a bus. Further, the exhaust purification device 10 is not limited to the DPF 14 and can be widely applied to exhaust purification devices including a NOx purification catalyst such as SCR or LNT.

1 vehicle 10 exhaust purification device 12 DOC
14 DPF
DESCRIPTION OF SYMBOLS 20 Vehicle side terminal device 21 Reproduction | regeneration information acquisition accumulation | storage part 22 Data transmission part 40 Management side terminal device 41 Data reception part 42 Reproduction | regeneration state diagnostic part 43 Notification part

Claims (6)

A vehicle management system equipped with an exhaust purification device equipped with a filter that collects particulate matter in exhaust exhausted from an internal combustion engine and that can be regenerated by combustion removal of accumulated particulate matter,
A vehicle-side terminal device mounted on the vehicle, a management-side terminal device that is connected to the vehicle-side terminal device via a network and can be installed at a location different from the vehicle;
With
The vehicle-side terminal device includes a reproduction information acquisition unit that acquires reproduction information of the filter, and a transmission unit that transmits the reproduction information acquired by the reproduction information acquisition unit via the network;
Whether the management-side terminal apparatus is in a tendency to decrease the reproduction state of the filter based on the reception unit that receives the reproduction information transmitted from the transmission unit and the reproduction information acquired by the reproduction information acquisition unit A reproduction state diagnosis unit for diagnosing or a notification unit for notifying a diagnosis result of the reproduction state diagnosis unit,
The reproduction information acquisition unit acquires reproduction information related to automatic reproduction and reproduction information related to manual reproduction,
The reproduction state diagnosis unit diagnoses whether or not the collection function of the filter tends to decrease based on a reproduction interval from the end of automatic reproduction to the start of the next automatic reproduction, and is acquired by the reproduction information acquisition unit The management system, wherein the reproduction information relating to the automatic reproduction and the reproduction information relating to the manual reproduction are distinguished and used for diagnosis. The management system according to claim 1, wherein the reproduction state diagnosis unit diagnoses whether or not the reproduction function of the filter tends to decrease based on an occurrence frequency of reproduction incomplete with respect to reproduction completion. The management system according to claim 1, wherein the reproduction state diagnosis unit diagnoses whether or not the automatic reproduction function tends to be lowered based on an execution frequency of manual reproduction. The regeneration state diagnosis unit diagnoses whether or not the particulate matter combustion removal function at the time of regeneration tends to decrease based on the frequency of occurrence of regeneration failure and the frequency of execution of manual regeneration. The management system according to any one of the above. The management system according to any one of claims 1 to 4, wherein the notification unit notifies that the maintenance is recommended together with the diagnosis result when the reproduction state diagnosis unit diagnoses a decrease tendency. The regeneration state diagnosing unit diagnoses whether the combustion removal efficiency of particulate matter during regeneration tends to decrease based on the occurrence frequency of regeneration interruption during execution of automatic regeneration or manual regeneration,
The management system according to claim 1, wherein, when the reproduction state diagnosis unit diagnoses a decrease tendency, the notification unit notifies that the execution of manual reproduction is recommended together with the diagnosis result.

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