JP2021071092A - Maintenance proposal method for catalytic exhaust gas post treatment device for vehicle mounted with internal combustion engine - Google Patents

Abstract

To provide a maintenance proposal method proposing appropriate cleaning method and maintenance time for a catalytic exhaust gas post treatment device such as an exhaust gas post treatment device and an exhaust gas recirculation device.SOLUTION: A maintenance proposal method comprises: an information collection process to collect information on operation of a vehicle requiring cleaning and on an engine load of the vehicle; an analysis process to determine a degree of contamination and deterioration of a catalytic exhaust gas post treatment device of the vehicle requiring the cleaning on the basis of the information on the operation and engine load of the vehicle; a selection process to select a maintenance method and maintenance time for the catalytic exhaust gas post treatment device on the basis of a determination result of the degree of contamination and deterioration; and a maintenance proposal process to propose the selected maintenance method and maintenance time.SELECTED DRAWING: Figure 1

Description

The present invention is a method for proposing maintenance that proposes a suitable cleaning prescription and maintenance timing for an exhaust gas aftertreatment device with a catalyst such as DPF, EGR, DPR, etc. in a vehicle equipped with an internal combustion engine such as a diesel vehicle such as a truck or a special vehicle. Regarding.

Since 2007, the "automobile fuel quality regulation value" has been strengthened along with the automobile exhaust gas regulations, and the Ministry of Foreign Affairs and each automobile manufacturer have been using DPF, EGR, DPR and other vehicle exhaust gas aftertreatment devices and exhaust gas recirculation devices. The user is informed about the correct usage of the vehicle equipped with the exhaust gas aftertreatment device with a catalyst such as.

For example, for cleaning the DPR, which is an exhaust gas aftertreatment device with a catalyst, the catalyst part is disassembled, high-pressure water, steam, etc. are sprayed to physically peel off the deposits, and then high-temperature air is supplied. Although the drying process such as air-drying is carried out, it is very difficult to efficiently apply high-pressure water to the adhered part due to the structure of the catalyst, and the cleaning effect is extremely poor, so the catalyst itself is often replaced. ..

In reality, vehicles with special work such as buses and elevated construction vehicles have a longer idling time than general transportation vehicles, so the catalysts in DPF, EGR, DPR, etc. are more likely to get dirty, which causes deterioration. There is a tendency for the catalyst to be replaced earlier because it is intense. As a result, for example, in a special vehicle, it is necessary to replace the catalyst in 2 to 4 years, so that a large amount of expense is often incurred.

In the actual maintenance of such vehicles with a catalyst-equipped exhaust gas aftertreatment device at an automobile maintenance shop, attempts are made to regenerate the catalyst by various cleaning treatments such as chemical cleaning using various cleaning agents and incineration removal of deposits due to high heat load. However, as a result of significant dirt adhering, cleaning defects due to insufficient cleaning agent and overheating of the catalyst have caused cases in which the catalyst base material is melted and the catalyst function cannot be fulfilled. Furthermore, when dirt adheres and solidifies significantly, there are cases where a phenolic solvent that gives a very environmental load is used, and in the worst case, the catalyst cannot be regenerated even in these operations.

However, in an actual maintenance company such as an automobile maintenance shop, in a vehicle equipped with a diesel engine, the contamination of the catalyst in EGR and DPR and the condition of the members related to the catalyst of these devices are judged from the mileage as described above. It was difficult to do. Therefore, if maintenance of exhaust gas aftertreatment devices with catalysts such as exhaust gas aftertreatment devices and exhaust gas recirculation devices can be proposed at the optimum timing, the frequency of catalyst replacement can be reduced, and costs and waste can be reduced. Is desirable.

The present invention has been made in view of the above problems, and is an exhaust gas aftertreatment device such as DPF, EGR, DPR, an exhaust gas recirculation device, etc. in a vehicle equipped with an internal combustion engine such as a diesel vehicle such as a truck or a special vehicle. It is an object of the present invention to provide a maintenance proposal method for proposing a suitable cleaning formulation and maintenance timing for the exhaust gas aftertreatment device with a catalyst.

In order to solve the above problems, the present invention is a method of proposing a maintenance method of an exhaust gas aftertreatment device with a catalyst of a vehicle to be cleaned, which is equipped with an internal combustion engine, and provides driving information of the vehicle to be cleaned and a vehicle. An information collection process for collecting engine load information, an analysis process for determining the degree of dirt / deterioration of the exhaust gas aftertreatment device with a catalyst of the vehicle to be cleaned based on the driving information and the engine load information of the vehicle, and the dirt / deterioration. The internal combustion engine is provided with a selection process for selecting the maintenance method and timing of the exhaust gas aftertreatment device with a catalyst based on the judgment result of the degree of deterioration, and a maintenance presentation process for presenting the selected maintenance method and timing. Provided is a method for proposing maintenance of an exhaust gas aftertreatment device with a catalyst of a vehicle (Invention 1).

According to the above invention (Invention 1), the driving information of the vehicle to be cleaned and the engine load information of the vehicle are obtained, the traveling pattern of the vehicle and the cause and situation of the trouble are clarified, and the exhaust gas aftertreatment device with a catalyst is used. By analyzing the dirt and deterioration situation and proposing the maintenance time and the appropriate maintenance prescription for the exhaust gas aftertreatment device with catalyst before the catalyst is replaced based on the analysis result, the exhaust gas with catalyst is used. Not only can a large amount of replacement cost associated with the replacement of the aftertreatment device and its peripheral materials be reduced, but also the risk of incurring a stoppage due to an exhaust gas abnormality during traveling and a cost associated with its restoration can be significantly reduced. In addition, since the catalytic effect of the exhaust gas aftertreatment device with a catalyst can be reliably stabilized, it can contribute to the reduction of the environmental load. Furthermore, since the customer who is a vehicle user can estimate the maintenance time, it is possible to adjust the vehicle inspection timing, and it is expected that there are operational advantages such as adjustment of vehicle management cost and adjustment of vehicle allocation.

In the above invention (Invention 1), it is preferable that the information collecting process collects actual driving information and vehicle operation information (Invention 2).

According to the above invention (Invention 2), the idling load of the vehicle can be estimated by obtaining the actual driving information and the vehicle operation information, and based on this, the exhaust gas aftertreatment device and the exhaust gas regeneration / circulation device can be estimated. It is possible to improve the accuracy of the next maintenance time proposal by analyzing the state of catalyst contamination in the exhaust gas aftertreatment device with a catalyst. Further, since the analysis accuracy of the properties and morphology of the dirt adhering to the exhaust gas aftertreatment device with a catalyst can be improved, the cleaning efficiency and cleaning accuracy at the time of maintenance can be improved.

In the above inventions (Inventions 1 and 2), it is preferable to include, after the maintenance presentation process, a process of requesting maintenance reservation and consignment to a business operator performing the presented maintenance (Invention 3).

According to the above invention (Invention 3), when a customer who is a user of a vehicle to be cleaned receives a maintenance prescription, he / she visits an automobile maintenance shop in advance based on the analysis result of the exhaust gas aftertreatment device with a catalyst. Since maintenance reservations and maintenance consignments can be made, customers can deal with unexpected expenses such as urgent vehicle stoppages and catalyst replacements, which simplifies vehicle management in terms of cost. In addition, by obtaining the analysis results of the exhaust gas aftertreatment device with catalyst, the maintenance operator can grasp the status of catalyst contamination in the exhaust gas aftertreatment device with catalyst of the vehicle to be cleaned in advance before performing maintenance. Since maintenance can be prepared according to the vehicle conditions, maintenance schedule adjustment, cleaning agent selection, and cleaning agent purchase can be performed systematically. As a result, maintenance can be carried out efficiently in terms of time and cost, and the reliability of maintenance can be further improved.

In the above inventions (Inventions 1 to 3), it is preferable to perform the presentation step with an electronic terminal (Invention 4).

According to the above invention (Invention 4), for example, by mounting an electronic terminal on a vehicle and displaying information sequentially, it is possible to obtain information effective for a maintenance prescription to be cleaned at an early stage. The driving vehicle avoids an emergency stop of the engine by the NOx sensor of exhaust gas, and the person in charge of dispatching can avoid highly uncertain expenses such as reliable vehicle allocation arrangement and catalyst replacement by being able to predict troubles in advance. Furthermore, the maintenance shop can quickly respond to maintenance by grasping the status of the requested vehicle in advance and obtaining the analysis result from the electronic terminal, and can improve the maintenance efficiency and shorten the delivery time.

In the above inventions (Inventions 1 to 4), the maintenance selection step collates the database storing the cleaning agent selection, the cleaning prescription selection, and the maintenance method with the analysis result of the analysis step for determining the degree of stain / deterioration. It is preferable that these are selected by the above (Invention 5).

According to the above invention (Invention 5), a suitable maintenance prescription is simply obtained by the customer grasping the driving status, operation pattern, and mileage information of the vehicle and collating the information with a database of maintenance prescriptions created in advance. , Maintenance cost can be selected. As a result, the maintenance method of the exhaust gas aftertreatment device with a catalyst can be selected in a short time, and the maintenance service can be provided to the customer promptly and accurately.

In the above invention (Invention 5), it is preferable that the cleaning agent selection data in the database includes data of an inorganic deposit removing cleaning agent and an organic deposit removing cleaning agent (Invention 6).

According to the above invention (Invention 6), the deposits on the catalyst of the exhaust gas aftertreatment device with a catalyst are based on the traveling method of the vehicle, the habit of the driving vehicle, the idling time, the load factor, etc. Since the amount of adhesion and the degree of adhesion are different, the cleaning formulation such as selection of cleaning agent, cleaning compounding ratio, cleaning time, and temperature can be changed according to the pattern, shortening the cleaning time, reliability of cleaning effect, and cleaning cost. Can be reduced.

The present invention obtains driving information of a vehicle equipped with a diesel engine to be cleaned, collects and analyzes vehicle information using a scan tool or the like, and presents a suitable maintenance time and maintenance prescription for the catalyst-induced exhaust gas aftertreatment device of the vehicle. Because of this method, customers who use vehicles can reduce the burden of engine stoppage and urgent vehicle allocation adjustment due to catalyst troubles in the exhaust gas aftertreatment device with catalyst, and avoid expensive expenses due to urgent catalyst replacement. However, it is possible to carry out planned vehicle management including costs.

It is a flow chart which shows the flow of each process of the proposal method of maintenance of the exhaust gas aftertreatment device with a catalyst by one Embodiment of this invention. It is a schematic diagram which shows the correlation of the component of each process in the maintenance proposal method of the said embodiment. It is a schematic diagram which shows the display state of a suitable maintenance prescription in the presentation process of the said embodiment.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the flow of each step of the method for proposing maintenance according to the embodiment of the present invention, and FIG. 2 shows the correlation of the components of each step in FIG.

The maintenance proposal method of the present embodiment includes an information collection step of collecting driving information of the vehicle to be cleaned and engine load information of the vehicle, and an analysis step of determining the degree of contamination / deterioration of the catalyst of the exhaust gas aftertreatment device with a catalyst. , A selection process that selects the maintenance method and timing of the exhaust gas aftertreatment device with a catalyst, a maintenance presentation process that presents the selected maintenance method and timing, and a request process that makes maintenance reservations and outsourcing as necessary. And. Hereinafter, each of these steps will be described.

[Information collection process]
In FIGS. 1 and 2, first, the vehicle information of the vehicle to be washed by the customer S who owns the vehicle to be maintained is obtained. Here, the vehicle information includes driving information and vehicle engine load information.

(Driving information)
The driving information of the vehicle to be cleaned includes vehicle information and driving information. As the vehicle information involved in the analysis of the driving pattern, the vehicle type, the vehicle number, the mileage, the traveling time, the type of industry used, the operating status, the hour meter depending on the vehicle, and the like can be utilized. Further, as the driving information, if there is vehicle driving information utilizing satellites, a more accurate driving pattern can be obtained.

(Engine load information)
As the engine load information, the scan tool information of the vehicle to be cleaned by the customer S (fault code (DTC) recorded by the on-board diagnostic device (OBD) and each information thereof are utilized.

Specifically, check engine lamp, misfire monitor, fuel system monitor, catalyst monitor, heating catalyst monitor, EVPA monitor, 2nd air monitor, A / C monitor, O ₂ center (A / F sensor) monitor, O ₂ sensor ( A / F sensor) heater monitor, EGR / VVT monitor, catalyst test result, heating catalyst test result, EVAP purge system test result, second airflow system result, O ₂ sensor (A / F sensor) test result, O ₂ sensor heater Test result, EGR system test result, engine load value, engine cooling water temperature, intake manifold pressure, engine speed, vehicle speed, intake air temperature, intake air amount, throttle No. 1 sensor opening, time after engine start, common rail pressure, A / F target air-fuel ratio B1S1, A / F sensor voltage B1S1, EGR opening, number of warm-ups after DG erasing, mileage after DG erasing, atmospheric pressure, supplement Machine battery voltage, accelerator sensor No. 1 opening, accelerator sensor No. 2 opening, throttle motor output, elapsed time after DG erase, NOx density B1S1 support, NOx density B1S1, engine start count, engine speed when starter is off, starter ON count during current trip, previous trip mileage, water temperature high temperature state , Rail pressure insufficient, Overvoltage pressure insufficient, Intake amount insufficient, Immobilizer fuel cut history, Afterglow request, Preglow request, Target idle rotation speed, Ignition ON time, Glow lighting required time, MAF / estimated MAF rate, Pilot 1 injection time, Pilot 2 injection time, main injection time, after injection time, pilot 1 injection timing, pilot 2 injection timing, after injection timing, idle injection amount correction learning value, injection amount correction value # 1, injection amount correction value # 2, injection amount Correction value # 3, injection amount correction value # 4, fuel injection amount, pump current correction learning, target engine speed, target common rail pressure, catalyst manual regeneration state, catalyst temperature rise failure, supply pump control mode, fuel addition amount abnormality , Catalyst deterioration, catalyst clogging state, catalyst abnormal overheating, differential pressure judgment catalyst clogging, differential pressure judgment catalyst melting damage, DPR control mode, supply pump learning, VN turbo actual opening, PCV final drive duty, PCV drive current target Value, engine overspeed abnormality history, exhaust temperature sensor B1S1, exhaust temperature sensor B1S2, number of first steps of EGR, abnormality in fuel water entry, idle stop permission, starter invalid relay, accelerator sensor opening (PTO), accelerator sensor voltage ( PTO), fuel temperature, accelerator pedal opening, actual throttle opening, VN turbo target opening, pump current target value, idle rotation correction injection amount, EEPROM abnormality (QR code (registered trademark)), DPR differential pressure abnormality / excess Accumulation, DPR high exhaust temperature, fuel addition valve excess, return fuel temperature, throttle target opening, differential pressure determination catalyst, fuel addition valve injection correction value, target boost pressure, target common rail pressure, VNT actual opening, PM accumulation rate , Common rail fuel pressure 2, accelerator No. 1 sensor voltage, accelerator No. 2 sensor voltage, throttle fully closed position learning value, VN turbo type, VN turbo maximum opening, VN turbo minimum opening, injection pressure feedback correction amount, differential pressure sensor variation correction value, DPR forced regeneration state, supply pressure deviation, VN Turbo operation prohibited, number of diagnostic cords, mode state, stop lamp SW, neutral start SW, air conditioner signal, starter signal, immobilizer communication line, throttle fully closed position learning history, EGR fully closed position learning history, engine oil pressure SW, DPR manual Regeneration SW, PTO SW, engine stop switch, exhaust brake SW, IG SW, PTO switch 2, reverse SW, clutch switch, actual EGR valve position, EGR operation prohibited, air conditioner cut state, TC terminal ON, DPR / DPNR differential pressure, Water temperature at start, intake temperature at start, exhaust temperature sensor B1S1 (B1S3), exhaust temperature sensor B1S2 (B1S4), intake temperature after turbo, cylinder stop engine speed # 1, cylinder stop engine speed # 2, cylinder stop engine rotation All or part of the information such as the number # 3, the cylinder stop engine speed # 4, and the average engine speed of all cylinders can be appropriately selected and utilized. Furthermore, if there is a past maintenance record, the maintenance information may be obtained and utilized.

[Dirty / deterioration analysis process]
After obtaining the driving information and the engine load information of the vehicle, based on this obtained information, the driving pattern, the cause / situation of the trouble are clarified by the calculation means T such as a personal computer, and the exhaust in the vehicle is based on this. Analyze the dirt and deterioration status of the catalyst of the exhaust gas aftertreatment device with catalyst such as the gas aftertreatment device or the exhaust gas regeneration circulation device.

To analyze this dirt / deterioration situation, a database of running patterns such as driving information and vehicle engine load information, and the amount of deposits, components, and degree of adhesion of the exhaust gas aftertreatment device with a catalyst to the catalyst is created in advance. By collating the analyzed running pattern with the database, it is possible to analyze the dirt / deterioration status of the exhaust gas aftertreatment device with a catalyst.

[Maintenance prescription selection process]
For the selection of maintenance prescription, a database of cleaning ability by various cleanings is created in advance, and the analysis result of dirt / deterioration obtained by the above-mentioned analysis process is collated with this database, which is suitable according to the running pattern. Maintenance prescriptions can be selected. The maintenance prescription may be selected by washing with chemicals, high-pressure water washing alone, or a combination of a plurality of these. Further, depending on the state of contamination and sticking of the catalyst of the exhaust gas aftertreatment device with a catalyst, replacement with a rebuilt product or a new product may be selected according to the cleaning ability, cost, maintenance time, and the like.

The stain / deterioration analysis process and maintenance prescription selection process include, for example, stain information such as the operation pattern, the amount of deposits on the catalyst of the exhaust gas aftertreatment device with a catalyst, the components, and the degree of adhesion, and the cleaning ability by these various cleanings. The maintenance prescription information of the above is stored in the database D related to the maintenance of the cloud C. Then, the driving pattern obtained as the operation information is first transmitted to the cloud C and collated with the database D, and the contamination status such as the amount of deposits, the components and the degree of adhesion to the catalyst of the exhaust gas aftertreatment device with a catalyst and its progress It is sufficient to predict the period until maintenance is required for the exhaust gas aftertreatment device with a catalyst, and then select a maintenance prescription for cleaning ability by various cleanings according to this. When the customer S is measuring the engine load with the Scan system, the person in charge of proposal inputs the measurement result into the electronic terminal I such as a mobile PC or tablet terminal carried by the person in charge of proposal, and obtains the measurement result from the electronic terminal I. The obtained operation information may be transmitted to the cloud C, collated with the database D, and a suitable maintenance prescription may be selected. From these, the maintenance prescription and cost can be selected in a short time from the result of the operation information, and the next maintenance time can be estimated.

[Maintenance prescription presentation process]
After selecting a suitable maintenance prescription in this way and estimating the next maintenance time, the selected maintenance prescription is presented to the customer S. This re-presentation of the next maintenance period will also be presented. The presentation of the maintenance prescription may be displayed on the electronic terminal I such as a mobile PC or tablet terminal carried by the person in charge of making a proposal to the customer S. Further, it may be presented to the customer S by paper output by FAX or the like, or may be transmitted as electronic data to the PC terminal of the customer S. Further, it may be sequentially displayed on the electronic terminal I such as a car navigation system mounted on the vehicle. The presentation of the selected maintenance prescription exemplifies a plurality of types of maintenance prescriptions as images on the electronic terminal I, for example, as shown in FIG. At the same time, vehicle information is also presented. The customer S can use these as a material for determining which of the selected maintenance prescriptions is to be adopted.

[Request process]
Further, in the present embodiment, the customer S who has been presented with the maintenance prescription of the vehicle to be cleaned includes a process (requesting process) of requesting a predetermined contractor for maintenance work from the presented maintenance prescription. At this time, as shown in FIG. 3, the customer S presents a maintenance prescription for a plurality of types of work contents, a maintenance period, a useful conversion day after maintenance, and a cost (cost), and by referring to this, the customer S desires maintenance. You can select and request a prescription.

On the other hand, the contractor who received the maintenance order in this process obtains not only the request but also the maintenance prescription, so that the parts necessary for maintenance, the cleaning agent, or the necessary parts such as DPR of the new or remanufactured product can be obtained in advance. By purchasing it, maintenance can be performed effectively. In particular, if the customer S can make a continuous request from the presentation screen of the electronic terminal I, the maintenance company can make the request in a short time and can prepare for it quickly, so that the maintenance can be performed efficiently and the period can be extended. It can be shortened significantly.

[Washing method]
In the maintenance prescription proposal method of the present embodiment as described above, as the cleaning agent, a cleaning agent for removing inorganic deposits and a cleaning agent for removing organic deposits can be preferably used. As a cleaning agent for inorganic deposits, an acid, an alkali, a chelating agent or the like can be used. As the cleaning agent for removing organic deposits, a surfactant, a peroxide, a solvent and the like can be used, and these may be carried out alone or in combination of two or more kinds.

As the cleaning device, a device using ultrasonic cleaning, high-pressure cleaning, microbubbles, and nanobubbles can also be utilized. As the cleaning method, a method of circulating the cleaning liquid, a surging method, an ultra-high pressure cleaning, an ultra-high pressure cleaning, a blast cleaning, a plasma cleaning, a low temperature cleaning, etc. can be used. Is also good. These cleaning agents, cleaning devices, and cleaning methods may be carried out alone or in combination.

As for the information on these cleaning agents and cleaning devices, the data of the inorganic deposit removing cleaning agent and the organic deposit removing cleaning agent may be stored in the database D.

Then, in the drying step after cleaning, air-drying may be performed, heated air and heated steam can be ventilated to the exhaust gas aftertreatment device with a catalyst to dry, and air-drying after immersion in a solvent may be performed, and organic substances such as surfactants may be used. May be sprayed together with the heated steam.

Although the method of proposing the maintenance of the exhaust gas aftertreatment device with a catalyst of the vehicle equipped with the internal combustion engine of the present invention has been described above with reference to the attached drawings, the present invention is not limited to the above embodiment and various modifications are made. It is possible to carry out. For example, the DPR catalyst has various applications such as a method of removing the catalyst and installing only the catalyst in a separate container, and a method of cleaning the entire exhaust gas line, and the shape thereof is not limited. Further, in the above embodiment, the maintenance method is selected via the cloud, but the calculation means T may directly determine the maintenance method via the electronic terminal.

S Customer T Computational means C Cloud D Database I Electronic terminal

Claims (6)

It is a method of proposing a maintenance method for an exhaust gas aftertreatment device with a catalyst of a vehicle to be cleaned equipped with an internal combustion engine.
An information collection process for collecting driving information of the vehicle to be cleaned and engine load information of the vehicle, and
An analysis process for determining the degree of contamination / deterioration of the catalytic exhaust gas aftertreatment device of the vehicle to be cleaned based on the driving information and the engine load information of the vehicle.
A selection process for selecting the maintenance method and timing of the exhaust gas aftertreatment device with a catalyst based on the judgment result of the degree of dirt / deterioration, and
A method for proposing maintenance of a catalyst exhaust gas aftertreatment device for a vehicle equipped with an internal combustion engine, which comprises a maintenance presentation process for presenting the selected maintenance method and timing. The method for proposing maintenance of a catalyzed exhaust gas aftertreatment device for a vehicle provided with an internal combustion engine according to claim 1, wherein the information collecting process collects actual driving information and vehicle operation information. The exhaust gas aftertreatment device with a catalyst of a vehicle equipped with an internal combustion engine according to claim 1 or 2, further comprising a process of requesting maintenance reservation and consignment to a business operator performing the presented maintenance after the maintenance presentation process. How to propose maintenance. The method for proposing maintenance of an exhaust gas aftertreatment device with a catalyst of a vehicle provided with an internal combustion engine according to any one of claims 1 to 3, wherein the presentation step is performed by an electronic terminal. The maintenance selection process selects these by collating a database storing cleaning agent selection, cleaning prescription selection, and maintenance method, respectively, with the analysis results of the analysis process for determining the degree of stain / deterioration. The method for proposing maintenance of a catalytic exhaust gas aftertreatment device for a vehicle provided with an internal combustion engine according to any one of claims 1 to 4. Maintenance of a catalytic exhaust gas aftertreatment device for a vehicle equipped with an internal combustion engine according to claim 5, wherein the cleaning agent selection data in the database includes data on an inorganic deposit removing cleaning agent and an organic deposit removing cleaning agent. Proposal method.

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