WO2011118250A1 - Dpfの再生制御装置、再生制御方法、および再生支援システム - Google Patents
Dpfの再生制御装置、再生制御方法、および再生支援システム Download PDFInfo
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- WO2011118250A1 WO2011118250A1 PCT/JP2011/051512 JP2011051512W WO2011118250A1 WO 2011118250 A1 WO2011118250 A1 WO 2011118250A1 JP 2011051512 W JP2011051512 W JP 2011051512W WO 2011118250 A1 WO2011118250 A1 WO 2011118250A1
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- dpf
- ash
- differential pressure
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- regeneration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0086—Filter condition indicators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
Definitions
- the present invention relates to a regeneration control device, a regeneration control method for a diesel particulate filter (hereinafter abbreviated as DPF) for collecting particulate matter (exhaust particulates, hereinafter abbreviated as PM) contained in exhaust gas of a diesel engine, and More particularly, the present invention relates to a regeneration control apparatus, a regeneration control method, and a regeneration support system that perform ash cleaning by estimating the amount of ash deposited on a DPF.
- DPF diesel particulate filter
- PM exhaust particulates
- the DPF is known as an effective technique for reducing PM discharged from a diesel engine.
- the DPF is a PM collection device using a filter, and soot (soot) components and ash (ash) components discharged from the engine are deposited on the DPF.
- the soot component can be burned out by forced regeneration, but the ash cannot be burned even if forced regeneration is performed, and accumulates in the DPF. If this ash is deposited, the DPF is clogged, leading to an increase in exhaust pressure. Therefore, it is necessary to predict the amount of accumulated ash and periodically perform ash cleaning.
- Patent Document 1 discloses a technique for obtaining an ash deposition amount from a DPF differential pressure immediately after completion of regeneration of a DPF
- Patent Document 2 A technique for calculating the ash accumulation amount by integrating the travel distance is shown.
- Patent Document 3 calculates the ash emission amount from the map of the engine speed and the fuel consumption amount, and adds the ash emission amount.
- Patent Document 4 discloses a technique for calculating the ash accumulation amount by detecting the oil level using an oil sensor and integrating the oil level.
- the DPF differential pressure is higher than when the ash is not deposited.
- the ash accumulation amount can be quantitatively accurately determined. it is difficult to estimate in.
- the method is a simple method, but there is a problem in estimation accuracy because conditions such as engine load cannot be considered.
- the technique of calculating the ash emission amount from the map of the engine speed and the fuel consumption amount of Patent Document 3 and calculating the accumulation amount by adding the ash emission amount it takes a lot of test points to create the map, and it takes time. It is difficult to ensure the accuracy of the entire map.
- the technique of calculating the ash accumulation amount by detecting the oil level with the oil sensor disclosed in Patent Document 4 requires the installation of the oil sensor, which increases the cost.
- ash is not mainly composed of carbon like soot, and mainly contains components derived from metallic additives in engine oil, so it cannot be incinerated by combustion, and is blown away by compressed air and washed. Therefore, it is necessary to work in a dedicated service factory with equipment for cleaning. For this reason, a regeneration support system for the DPF is also required which accurately notifies the operator of the ash cleaning request so that the ash cleaning can be efficiently performed at the service factory.
- the present invention has been made in view of these problems, and it is possible to accurately estimate the amount of ash deposition by a simple method, accurately notify the operator of the ash cleaning request, and perform ash cleaning at a service factory. It is an object of the present invention to provide a DPF regeneration control apparatus, a regeneration control method, and a regeneration support system that can be efficiently performed.
- the invention according to the DPF regeneration control apparatus of the first invention comprises a diesel particulate filter (DPF) that collects exhaust particulates (PM) in the exhaust passage, and is collected in the DPF.
- DPF regeneration control device having a forced regeneration means for forcibly regenerating the PM, a differential pressure detection means for detecting a differential pressure across the DPF, and a DPF differential pressure generated by a total accumulation amount of a soot component and an ash component Is set in advance by testing or calculation, and the DPF differential pressure with respect to the deposition amount requiring the cleaning is set as a cleaning request threshold, and the ash deposition amount is deposited more than the deposition amount requiring the cleaning and the output is reduced.
- a DPF differential pressure setting means for setting a DPF differential pressure with respect to the amount of deposition that needs to be output as an output decrease threshold, and the DPF differential pressure is set to the cleaning request threshold When it is determined whether or not it has been reached, when it is determined and reached whether or not the cleaning request notifying means for outputting a cleaning request and the DPF differential pressure has reached the output lowering threshold value that is greater than the cleaning request threshold value Is provided with an output decrease alarm means for alarming an output decrease.
- the invention according to the DPF regeneration control method of the second aspect of the invention includes a diesel particulate filter (DPF) that collects exhaust particulates (PM) in the exhaust passage, and forcibly regenerates the PM collected by the DPF.
- DPF diesel particulate filter
- the DPF differential pressure generated by the total deposition amount of the soot portion and the ash portion is set in advance by a test or calculation, and the ash deposition amount corresponds to the deposition amount requiring cleaning.
- a DPF differential pressure is set as a cleaning request threshold, a DPF differential pressure is set as an output decrease threshold with respect to a deposition amount in which the ash deposition amount is larger than the deposition amount requiring cleaning and output reduction is required, and the DPF difference Determining whether or not the pressure has reached the cleaning request threshold, and if so, a cleaning request notification step for outputting a cleaning request; and PF differential pressure to determine if it has reached the cleaning request larger than the threshold value output reduction threshold, If it is judged, characterized in that had a decrease in output warning step of warning the output reduction.
- the first and second inventions in order to estimate and calculate the ash deposition amount from the differential pressure before and after the DPF, a new sensor is used by using signals from existing differential pressure sensors for forced regeneration control of the DPF. Therefore, it is possible to suppress an increase in cost as compared with a technique in which an oil sensor as in the prior art is installed, the oil level is detected, integrated, and the amount of accumulated ash is calculated.
- the technique for obtaining the ash deposition amount from the DPF differential pressure does not necessarily increase the DPF differential pressure proportionally even if the ash deposition amount increases. Since the DPF differential pressure hardly increases, there is a problem in accurately predicting only the ash deposition amount from the DPF differential pressure.
- the total deposition of the preset soot deposition amount and the ash deposition amount is present. Since the ash cleaning time is estimated and notified based on the DPF differential pressure characteristics (see FIG. 3) based on the DPF, the soot deposition amount and the ash deposition are detected as the DPF differential pressure that cannot be detected accurately only by the ash deposition amount. by using the total deposition amount of the amount, it becomes the changes in ash accumulation amount contained therein to be able to determine accurately detected and cleaning time.
- manual regeneration notifying means for urging manual forced regeneration of the DPF before notifying the ash cleaning request when the cleaning request threshold is reached.
- the manual forced regeneration notification means for urging the manual forced regeneration of the DPF is provided before the cleaning request is notified, the DPF is forced to be manually regenerated and the soot is burned and removed, so that the DPF difference temporarily
- the pressure can be decreased and a notification can be made when the DPF differential pressure reaches the cleaning request threshold again. Therefore, the reliability of the DPF cleaning request notification can be improved.
- the timing of the DPF cleaning work carried to the service factory by manual forced regeneration can be adjusted.
- the notification interval for prompting the cleaning request after the manual forced regeneration is completed decreases.
- the cleaning request threshold is reached again after the manual forced regeneration is completed
- the cleaning request may be notified without executing the manual forced regeneration within a predetermined time from the completion of the manual forced regeneration.
- the cleaning request is notified without executing manual forced regeneration, and the reliability of the cleaning request notification can be improved.
- oil dilution occurs in which engine oil is diluted by the fuel used in performing the forced regeneration, which can be prevented.
- the ash accumulation amount estimation means for estimating the ash accumulation amount of the DPF based on an index having a correlation with the consumption amount of the engine oil is further provided, and the accumulation amount calculated by the ash accumulation amount estimation means. Even if the estimated value does not reach the deposition amount that requires cleaning, it is preferable to output a cleaning request when the DPF differential pressure reaches the cleaning request threshold.
- the ash accumulation amount estimation accuracy can be improved by further using the ash accumulation amount estimation means for estimating the DPF ash accumulation amount by an index having a correlation with the engine oil consumption amount.
- ash mainly contains components derived from metallic additives in engine oil, so if the type of engine oil used changes, the method of estimating from the amount of engine oil consumed will give accurate ash accumulation.
- estimation may be difficult, the accuracy of notification of the ash cleaning request can be maintained even when the engine oil is changed by preferentially outputting the determination of the cleaning request threshold estimated from the DPF differential pressure.
- a DPF differential pressure correcting unit that corrects the differential pressure detected by the differential pressure detecting unit to a differential pressure in a certain operating state
- the DPF differential pressure is the DPF differential pressure correcting unit.
- the corrected differential pressure corrected by the above may be used. In this way, the use of the corrected differential pressure can increase the deposition amount estimation accuracy. In other words, even if the amount of deposit is the same, the differential pressure changes depending on the exhaust gas volume flow rate. Therefore, the exhaust gas volume flow rate at the time of measurement is corrected to the reference gas flow rate in the reference state, and the differential pressure at the reference gas flow rate is corrected. Calculate as
- a third invention is an invention according to a DPF regeneration support system provided with the DPF regeneration control device of the first invention, and the regeneration control device is connected to an in-vehicle terminal capable of communicating with an ash management server.
- the ash management server has a database storing service factory locations, calendar information that can be worked on each service factory, and when the cleaning request is notified by the cleaning request notification means of the regeneration control device,
- the terminal device is characterized in that the nearest service factory capable of ash cleaning and workable calendar information are obtained from the ash management server and displayed on the in-vehicle terminal device.
- the regeneration control device is provided with a manual regeneration informing means for urging manual forced regeneration of the DPF before notifying the ash cleaning request when the cleaning request threshold is reached.
- manual regeneration is executed after notification by the manual regeneration notifying means, it is preferable to predict the time when the cleaning request threshold is reached again and update and display the workable calendar information.
- the third invention preferably, based on the service factory and workable calendar information displayed on the in-vehicle terminal, it is possible to input a service factory designation and work request date and time to the in-vehicle terminal, Work request information may be transmitted from the vessel to the ash management server.
- Ash does not contain carbon as a main component like soot, and contains components derived mainly from metallic additives in engine oil, so it cannot be incinerated by combustion and must be cleaned with compressed air. It requires work at a dedicated service factory with equipment or a washing machine that can be transported.
- the nearest service factory and calendar information capable of service work are obtained based on the information from the ash management server, and the service factory and work request are sent from the in-vehicle terminal to the ash management server. Since the date and time can be transmitted, ash cleaning can be performed efficiently at the service factory.
- a fourth invention is an invention according to a DPF regeneration support system comprising the DPF regeneration control device of the first invention, and the regeneration control device is connected to an in-vehicle terminal that can communicate with an ash management server.
- the ash management server has a maintenance database that accumulates data on the ash amount washed at the time of ash washing, the accumulated operation time until the washing time, the accumulated fuel consumption amount, and the accumulated engine speed, and the ash amount at the time of washing and
- the accumulated operation time, accumulated fuel consumption, and accumulated engine speed data read from the regeneration control device are transmitted from the in-vehicle terminal device to the maintenance database of the ash management server and accumulated, and the accumulated latest data
- a learning means for updating a relational expression set in the ash accumulation amount estimating means A new relation is characterized in that it is set to the ash accumulation amount estimating means via the vehicle-mounted terminal device has.
- the data of the ash amount cleaned at the time of ash cleaning, the cumulative operation time until the cleaning time, the cumulative fuel consumption amount, and the cumulative engine speed are stored in the ash management server.
- the relational expression set in the ash accumulation amount estimating means is updated based on the latest data by the learning means, so that the prediction accuracy of the next maintenance time can be improved. Further, since the new relational expression updated from the ash management server is transmitted and set to the ash accumulation amount estimating means on the vehicle side via the in-vehicle terminal unit, it is simple without increasing the size of the DPF regeneration control device.
- the relational expression can be updated in the control logic.
- a new sensor is used by using signals from existing differential pressure sensors for forced regeneration control of the DPF. There is no need to install it, and it is possible to estimate the amount of ash deposition with reduced cost compared to the technology that uses the oil sensor in the prior art to detect the oil level and integrate it to calculate the amount of ash accumulation. become.
- the ash cleaning time is estimated and notified based on the DPF differential pressure characteristic (see FIG. 3) based on the total accumulation of the soot accumulation amount and the ash accumulation amount set in advance, the accuracy is only determined by the ash accumulation amount.
- the total accumulated amount of DPF differential pressure that cannot be detected well, it is possible to accurately detect changes in the amount of accumulated ash contained therein, determine the cleaning time, and accurately estimate the amount of accumulated ash by a simple method. It is possible to accurately notify the operator of the ash cleaning request.
- the nearest service factory and calendar information capable of service work are obtained, and the service factory and work request are sent from the in-vehicle terminal to the ash management server.
- the ash cleaning can be efficiently performed at the service factory.
- the ash amount washed at the time of ash washing, the accumulated operation time until the washing time, the accumulated fuel consumption amount, and the accumulated engine speed data are accumulated in the ash management server, and the learning means Since the relational expression set in the ash accumulation amount estimating means is updated based on the latest data, the prediction accuracy of the next maintenance time can be improved.
- FIG. 1 It is a whole block diagram of a diesel engine provided with a regeneration control device of DPF.
- A is a control flowchart of the forced regeneration control device of the DPF showing the first embodiment, and
- a DPF regeneration control apparatus is applied to a diesel engine
- a DOC (pre-stage oxidation catalyst) 5 and a DPF (diesel particulate) that collects PM (exhaust particulates) downstream of the DOC 5 are disposed in an exhaust passage 3 of a diesel engine (hereinafter referred to as an engine) 1.
- An exhaust gas aftertreatment device 9 comprising a filter 7 is provided.
- This DOC (pre-stage oxidation catalyst) 5 detoxifies hydrocarbons (HC) and carbon monoxide (CO) in the exhaust gas, oxidizes NO in the exhaust gas to NO 2, and soot collected by the DPF 7 And the function of increasing the exhaust gas temperature by the oxidation reaction heat of the unburned fuel component in the exhaust gas when the soot collected in the DPF 7 is forcibly regenerated.
- HC hydrocarbons
- CO carbon monoxide
- the engine 1 includes an exhaust turbocharger 11 having an exhaust turbine 11 b and a compressor 11 a driven coaxially thereto. Air discharged from the compressor 11 a of the exhaust turbocharger 11 passes through an air pipe 13. Then, after the supply air is cooled by entering the intercooler 15, the supply air flow rate is controlled by the supply air throttle valve 17, and then the illustration of the engine 1 through the intake port provided for each cylinder from the supply air manifold 18. It does not flow into the combustion chamber.
- the engine 1 is provided with a common rail fuel injection device that controls the fuel injection timing and the injection amount and injects the fuel into the combustion chamber.
- a predetermined fuel is supplied from the common rail of the common rail fuel injection device to the fuel injection valve.
- a predetermined amount of fuel is supplied at the injection timing, and a control signal is input to the common rail fuel injection device from a regeneration control device 19 described later.
- the input position of the control signal to the common rail fuel injection device is denoted by reference numeral 21.
- an EGR (exhaust gas recirculation) pipe 23 is branched from the middle of the exhaust passage 3, and a part of the exhaust gas (EGR gas) is cooled by an EGR cooler (not shown) through the EGR pipe 23, and an air supply throttle valve 17 is introduced into the downstream portion of the valve 17 via the EGR valve 25.
- EGR exhaust gas recirculation
- the combustion gas that is, the exhaust gas 27 combusted in the combustion chamber of the engine 1 passes through the exhaust manifold 29 and the exhaust passage 3 in which exhaust ports provided for each cylinder are gathered, and passes through the exhaust turbine 11b of the exhaust turbocharger 11. After being driven to serve as a power source for the compressor 11a, it flows through the exhaust passage 3 so as to enter the DOC 5 of the exhaust gas aftertreatment device 9.
- the regeneration control device 19 for the DPF 7 includes an air flow sensor 31 for detecting the air flow rate flowing into the compressor 11a, an intake air temperature sensor 33, a DOC inlet temperature sensor 35, a DPF inlet temperature sensor 37, a DPF differential pressure sensor 39, Signals from the supply air temperature sensor 41 and the supply air pressure sensor 43 after supply are captured. Further, an engine speed signal 45 and a fuel injection amount signal 47 are respectively incorporated.
- the regeneration control device 19 for the DPF 7 includes a DPF differential pressure correction that corrects the differential pressure value from the differential pressure sensor 39 that detects the differential pressure across the DPF 7 to a differential pressure in a certain operating state.
- a means 49 is provided, and the corrected differential pressure is calculated by the DPF differential pressure correcting means 49.
- the exhaust gas volume flow rate at the time of measurement is corrected to the reference gas flow rate in the reference state, and the differential pressure at the reference gas flow rate is corrected. Calculate as By calculating and using this corrected differential pressure, it is possible to increase the estimation accuracy of the ash deposition amount.
- the relationship between the DPF differential pressure generated by the total accumulation amount of the soot portion and the ash portion as shown in FIG. 3 and the operation time is set in advance by a test or calculation, and the ash accumulation amount is washed.
- the corrected differential pressure of the DPF 7 with respect to the deposition amount that requires the cleaning is set as the cleaning request threshold value, and the corrected differential pressure of the DPF 7 with respect to the deposition amount that deposits more than the deposition amount that requires the cleaning and requires the output reduction is set.
- a DPF differential pressure setting means 51 for setting as an output decrease threshold is provided.
- the regeneration control device 19 determines whether or not the corrected differential pressure has reached the cleaning request threshold, and if so, the cleaning request is issued to prompt the cleaning and removal of the ash deposited on the DPF 7.
- the cleaning request notifying means 53 for notifying the output
- the output reduction warning means 55 for determining whether or not the corrected differential pressure has reached the output lowering threshold value larger than the cleaning required threshold value, and for warning the output lowering if it has been reached.
- the alarm / alarm unit 57 such as a lamp or a buzzer is activated.
- the exhaust gas temperature exceeds the limit range, and the exhaust gas performance is further deteriorated. At this point, a fail-safe function that lowers the output works. At this time, since it is not desirable that the fail-safe function works without any prior notice, an alarm is given in advance.
- step S2 it is determined whether the DPF correction differential pressure is equal to or higher than the ash cleaning request threshold value P1. If not, the process proceeds to step S6 and ends. If it is equal to or greater than the ash cleaning request threshold value P1, the process proceeds to step S3 to notify the ash cleaning request.
- step S4 it is determined whether the DPF correction differential pressure is greater than or equal to the output decrease warning threshold value P2. If not, the process proceeds to step S6 and ends. If the output decrease warning threshold value P2 is exceeded, the process proceeds to step S5 to warn of a decrease in output. Note that the flow shown in FIG. 2A is repeated at a predetermined cycle. Further, the relationship between the ash cleaning request threshold value P1 and the output decrease warning threshold value P2 is a relationship of P1 ⁇ P2 as shown in FIG.
- the technique for obtaining the ash deposition amount from the differential pressure before and after the DPF does not necessarily increase the DPF differential pressure proportionally even if the ash deposition amount increases. Since the DPF differential pressure hardly increases, there is a problem in accurately predicting only the ash deposition amount from the DPF differential pressure.
- the soot deposition amount and the ash deposition amount are set in advance. The ash deposition amount is estimated based on the DPF differential pressure characteristic (see FIG. 3) based on the total deposition of the water, and a cleaning request or output reduction is warned with a lamp, a buzzer, or the like.
- FIG. 3 shows a characteristic curve indicating the relationship between the operation time and the exhaust system pressure loss (DPF corrected differential pressure) using three types of DPFs A, B, and C.
- the ash cleaning request threshold value P1 and the output decrease warning threshold value P2 are set according to the DPF to be used. However, since the output reduction warning threshold value P2 affects the engine performance, the output reduction warning threshold value P2 is set to a constant value regardless of the type of DPF, and the ash cleaning request threshold value P1 is set according to the capacity of the DPF. Although it can be set, it may be the same value as P1 shown in FIG.
- the dotted line in FIG. 6 shows a state where forced regeneration is repeated.
- the second embodiment is characterized in that a manual regeneration notifying unit 72 and a manual forced regeneration unit 74 are provided as shown in FIG. 4 with respect to the first embodiment. Other configurations are the same as those of the first embodiment.
- manual regeneration notifying means 72 that prompts manual forced regeneration of the DPF 7 is provided. Then, when the operator turns on the switch 76 for executing the forced regeneration by the notification by the manual regeneration notifying means 72, the manual forced regeneration means 74 is operated, and the forced regeneration of the DPF 7 is executed.
- the outline of forced regeneration control is that when forced regeneration is started, DOC temperature increase control for activating DOC 5 is executed.
- This DOC temperature increase control is performed by narrowing the air supply throttle valve 17, narrowing the exhaust valve provided on the downstream side of the DPF 7, or performing early post injection after the main injection into the combustion chamber, etc.
- late post-injection is performed at a crank angle that does not contribute to combustion (about 180 deg after TDC (top dead center)), and fuel of late post-injection that has flowed into activated DOC5 is
- the exhaust gas temperature is further raised by the oxidation heat generated by the reaction, and the temperature is raised to a temperature of about 600 ° C. at which soot burns in the DPF 7, and the soot is burned and removed.
- step S12 it is determined whether the DPF correction differential pressure is equal to or higher than the ash cleaning request threshold value P1. If not, the process proceeds to step S24 and ends. If it is equal to or greater than the ash cleaning request threshold value P1, the process proceeds to step S13 and the ash cleaning request timer is counted. In step S14, it is determined whether or not the ash cleaning request timer has exceeded a threshold value. If exceeded, the ash cleaning request notification output is turned on in step S15.
- step S16 determines whether it is the first time that the ash cleaning request threshold value P1 has been exceeded.
- the manual regeneration lamp (notification alarm unit 57) blinks by means 72 to prompt manual regeneration. If it is determined in step S16 that it is not the first time that the ash cleaning request threshold P1 has been exceeded, it is determined in step S17 whether or not the ash cleaning request cancellation prohibition timer is equal to or less than the warning cancellation prohibition threshold T1.
- This ash cleaning request release prohibition timer is a timer that starts counting after completion of forced regeneration of the DPF 7 as shown in step S23.
- step S17 if the warning cancellation prohibition threshold T1 or less, the warning cancellation is prohibited in step S18, the ash cleaning request warning is maintained and turned ON. If the warning cancellation prohibition threshold T1 is exceeded in step S17, the warning for the ash cleaning request is canceled and the manual regeneration lamp blinks to prompt manual regeneration.
- step S19 When the ash cleaning request threshold value P1 is first exceeded, the operator is prompted to perform manual regeneration as in step S19. If NO in step S17, that is, manual regeneration is performed after exceeding the ash cleaning request threshold P1, and manual cleaning is urged when the ash cleaning request threshold P1 is again exceeded after T1 time has elapsed after completion. . However, if the ash cleaning request threshold value P1 is exceeded again at T2 within the warning cancellation prohibition threshold value T1, so-called oil dilution occurs in which the engine oil is diluted by the fuel used when the forced regeneration is executed. Regeneration is prohibited, and the process proceeds to step S18 to turn on the output of the ash cleaning request. In this case, ash cleaning request cancellation is prohibited until ash cleaning is executed.
- step S20 as a result of alarming in step S19, it is determined whether the operator operates the switch 76 to perform manual regeneration. If it is determined that manual regeneration is in progress, the ash cleaning request release prohibition timer is set to zero in step S21. In step S22, it is determined whether the forced regeneration of the DPF 7 is completed. If not completed, the process ends in step S24. If completed, the ash cleaning request release prohibition timer count is started in step S23, and in step S24. finish. The flow shown in FIG. 5 is repeated at a predetermined cycle.
- the manual forced notification means 72 for urging the manual forced regeneration of the DPF 7 is provided before the cleaning request is notified. Therefore, the DPF 7 is manually regenerated and the soot is burned and removed temporarily. Thus, the DPF differential pressure can be lowered, and a notification can be made when the DPF differential pressure reaches the cleaning request threshold again. Therefore, the reliability of the DPF 7 cleaning request notification can be improved. Moreover, the timing of the DPF cleaning work carried to the service factory by manual forced regeneration can be adjusted.
- the notification interval for prompting the cleaning request after the manual forced regeneration is completed decreases.
- the manual regeneration lamp for urging the manual forced regeneration is within a predetermined time (warning release prohibiting threshold T1) from the completion of the manual forced regeneration.
- T1 a predetermined time
- the cleaning request is notified without flashing.
- the cleaning request is notified without executing manual forced regeneration, and the reliability of the cleaning request notification can be improved.
- oil dilution occurs in which engine oil is diluted by the fuel used in performing the forced regeneration, which can be prevented.
- the reproduction control device 80 of the third embodiment will be described with reference to FIGS.
- the third embodiment is provided with an ash deposition amount estimating means 84 as shown in FIG. That is, together with the differential pressure accumulation amount estimation means 82 composed of the DPF differential pressure correction means 49, the DPF differential pressure setting means 51, the cleaning request notification means 53, and the output decrease warning means 55 described in the first embodiment, It is further characterized by further comprising an ash accumulation amount estimation means 84 for estimating the ash accumulation amount of the DPF with an index having a correlation with the consumption amount of the engine oil. Other configurations are the same as those of the first embodiment.
- the ash accumulation amount estimation means 84 has an overall configuration as shown in FIG.
- An operating time integrating unit 90 that integrates the operating time at the engine speed is provided.
- the ash accumulation amount calculation unit 100 for calculating the estimated ash accumulation amount is provided.
- the engine speed has a correlation with the number of times the piston moves up and down, and has a correlation with the amount of oil supplied to the combustion chamber. Further, when the load is high, the fuel injection amount increases and the combustion temperature rises, so that the amount of ash generated increases.
- the operation time is calculated as a supplement to the calculation based on the engine speed and the fuel consumption.
- the integrated value of engine speed, integrated value of fuel consumption, and integrated value of operating time correlate with oil consumption.
- FIG. 10 shows a relationship between the ash cleaning request threshold A1 and the ash deposition warning threshold A2 based on the ash deposition amount calculated by the ash deposition amount estimation means 84.
- step S32 it is determined whether or not the ash deposition value calculated by the ash deposition amount estimating means 84 is greater than or equal to the ash cleaning request threshold A1, and if so, an ash cleaning request is notified at step S34. If NO in step S32, it is determined in step S33 whether the DPF corrected differential pressure calculated by the DPF differential pressure correcting means 49 is greater than or equal to the ash cleaning request threshold value P1, and if so, the ash is determined in step S34. Notify cleaning request.
- step S35 determines whether the ash accumulation value calculated by the ash accumulation amount estimating means 84 is greater than or equal to the ash accumulation warning threshold value A2. in emit ash deposition warning.
- step S37 it progresses to step S37, it is determined whether a DPF correction
- the ash accumulation amount estimating means 84 for estimating the ash accumulation amount by an index having a correlation with the consumption amount of the engine oil, and the differential pressure accumulation amount estimation for estimating the ash accumulation amount from the differential pressure of the DPF. Since both the means 82 are provided, the estimation accuracy of the ash deposition amount can be improved.
- ash mainly contains components derived from metallic additives in engine oil, so if the type of engine oil used changes, it may be difficult to accurately estimate the amount of ash deposition.
- the accumulation amount estimating means 82 By preferentially outputting the determination of the cleaning request threshold value estimated from the DPF differential pressure by the accumulation amount estimating means 82, the accuracy of notification of the ash cleaning request can be maintained even when the engine oil is changed.
- the cleaning request is output with priority given to the determination when the estimation of the ash deposition amount due to the DPF differential pressure reaches the ash cleaning request threshold value P1, and the estimation of the ash deposition amount due to the DPF differential pressure is finally output as a warning of a decrease in output It can also be seen from the fact that the determination when the threshold value P2 is reached is the final determination.
- the fourth embodiment includes the reproduction control device 19 (70, 80) described in the first to third embodiments.
- the reproduction control device 19 includes the ash management server 103.
- the vehicle-mounted terminal device 105 that can communicate with the vehicle is configured to be connectable.
- the in-vehicle terminal 105 is connected to the ash management server 103 via the communication network 104. Further, the ash management server 103 is connected via a communication network 106 to each service factory (F1, F2,... Fn) where ash-cleanable equipment is installed.
- the ash management server 103 stores a service factory database 107 storing location data of each service factory (F1, F2,... Fn), operating days of each service factory, and calendar information that can be used for ash cleaning work.
- a calendar database 109 is provided.
- the in-vehicle terminal 105 When the cleaning request is notified by the cleaning request notification means 53 of the regeneration control device 19, the in-vehicle terminal 105 obtains the nearest service factory and workable calendar information that can be cleaned from the ash management server 103, and the in-vehicle terminal. 105.
- the in-vehicle terminal device 105 may be connected to the regeneration control device 19 or connected to the regular regeneration control device 19 when a cleaning request is notified from the regeneration control device 19.
- the regeneration control device 19 has a manual regeneration informing means 72 for urging manual forced regeneration of the DPF 7 before notifying the ash cleaning request when the cleaning request threshold value P1 described in the second embodiment is reached. Is provided.
- manual regeneration is executed after notification by the manual regeneration informing means 72, the time when the cleaning request threshold is reached again is predicted, the operator is notified, and the prediction result that reaches the cleaning request threshold again is ashed.
- the management server 103 By transmitting to the management server 103, the workable factory and calendar information are updated and displayed on the in-vehicle terminal 105. That is, the DPF 7 is forcibly regenerated manually to burn and remove the soot, temporarily lowering the DPF differential pressure, and waiting for the cleaning request notification when the DPF differential pressure reaches the cleaning request threshold again. Can be brought into the factory.
- the prediction of the time when the cleaning demand threshold is reached again is based on the relationship between the DPF differential pressure generated in the DPF differential pressure setting means 51 and the operation time due to the total accumulated amount of soot and ash as shown in FIG. Since it is set in advance by a test or calculation, the next time when the cleaning request threshold is exceeded again is calculated and predicted by the cleaning request prediction unit 110 of the regeneration control device 19 (70) based on the characteristics. Then, the prediction result is given to the ash management server 103 via the in-vehicle terminal 105, and the ash management server 103 updates the workable calendar information based on the service factory database 107 and the calendar database 109. Therefore, the schedule that can be carried into the service factory can be adjusted in advance based on the updated service factory and calendar information by predicting the time when the cleaning request threshold is reached again.
- the service factory and workable calendar information displayed on the in-vehicle terminal 105 it is possible to input the specification of the service factory and the specification of the work request date from the in-vehicle terminal 105, and the ash management server from the in-vehicle terminal 105
- the work request information can be transmitted to 103.
- Ash does not contain carbon as a main component like soot, and contains components derived mainly from metallic additives in engine oil, so it cannot be incinerated by combustion and must be cleaned with compressed air. This requires work in a dedicated service factory with equipment for cleaning. Accordingly, based on the information from the ash management server 103, the nearest service factory and calendar information that can be serviced are obtained, and the service factory and the date of work request are transmitted from the in-vehicle terminal 105 to the ash management server 103. As a result, ash cleaning can be performed efficiently at the service factory.
- the fifth embodiment includes the reproduction control device 80 described in the third embodiment, and the reproduction control device 80 can communicate with the ash management server 120 via the in-vehicle terminal 105. It is configured.
- the ash management server 120 includes a calendar database 109, a service factory database 107, a maintenance database 122, and learning means 124 of the fourth embodiment.
- the maintenance database 122 stores data on the amount of ash washed at the time of ash washing, accumulated operation time until washing, accumulated fuel consumption, and accumulated engine speed. These data are obtained by measuring the amount of ash removed at the time of cleaning and inputting it from the in-vehicle terminal device 105. Further, the accumulated operating time, the accumulated fuel consumption, and the accumulated engine speed are read from the regeneration control device 80 until the time of cleaning. Data is transmitted from the in-vehicle terminal 105 to the ash management server 120 and stored in the maintenance database 122.
- the learning unit 124 Based on the accumulated latest data, the learning unit 124 has a learning unit 124 that updates a relational expression set in the ash accumulation amount estimation unit 84, and the new relational formula updated by the learning unit 124 is the in-vehicle terminal.
- the ash accumulation amount estimation means 84 is set via 105.
- the predetermined primary function equation Y F 2 (X) using the integrated value of the fuel consumption in the second oil consumption estimating unit 94 as a parameter, and the integrated value of the operating time in the third oil consumption estimating unit 96
- the learning unit 124 updates the relational expression set in the ash accumulation amount estimation unit 84 based on the latest data, the prediction accuracy of the next maintenance time can be improved. Further, since a new relational expression updated from the ash management server 120 is transmitted and set to the ash accumulation amount estimating means 84 via the in-vehicle terminal 105, it is easy without increasing the size of the DPF regeneration control device 80.
- the relational expression can be updated with simple control logic.
- the ash deposition amount can be accurately estimated by a simple method, the ash cleaning request can be accurately notified to the worker, and the ash cleaning can be efficiently performed at the service factory. It is suitable for use in a playback control apparatus, playback control method, and playback support system.
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Abstract
Description
DPFは、フィルターを用いたPM捕集装置であり、このDPFにはエンジンから排出されるスート(すす)成分と、アッシュ(灰)成分が堆積する。スート成分は強制再生により焼ききることが出来るが、アッシュは強制再生を行っても焼ききることが出来ずDPFに堆積していく。このアッシュが堆積するとDPFの目詰まりがおき、排圧上昇につながるため、アッシュの堆積量を予測して定期的にアッシュ洗浄を行うことが必要である。
特許文献3のエンジン回転数と燃料消費量のマップからアッシュ排出量を求め、それを積算して堆積量を求める技術では、マップを作成するのに多くの試験点数が必要で時間がかかるうえ、マップ全体の精度を確保するのが困難である。
さらに、特許文献4のオイルセンサによりオイルレベルを検知してそれを積算しアッシュ堆積量を算出する技術では、オイルセンサを装備することが必要となりコスト増大につながる問題がある。
さらに、アッシュは、スートのように炭素を主成分とするものではなく、主としてエンジンオイル中の金属系添加剤に起因する成分を含むため燃焼によっては焼却できず、圧縮空気等によって吹き飛ばして洗浄する必要があるので、洗浄に際して設備がある専用のサービス工場での作業が必要となる。
このため、アッシュの洗浄要求を作業者に正確に報知して、アッシュ洗浄をサービス工場で効率的に行うことができるようにするDPFの再生支援システムも必要になる。
このように、洗浄要求を報知する前に、DPFの手動強制再生を促す手動強制再生報知手段を設けるので、DPFを手動によって強制再生させてスート分を燃焼除去することで、一時的にDPF差圧を低下させ、改めてDPF差圧が洗浄要求閾値に達したとき報知するようにできる。
従って、DPFの洗浄要求報知の信頼性を高めることができる。また、手動強制再生によってサービス工場に運んでのDPF洗浄作業のタイミングを調整できる。
所定時間以内に狭まる場合には、真にアッシュ洗浄が必要になったため、手動強制再生は実行せずに、洗浄要求を報知して、洗浄要求の報知の信頼性を高めることができる。
さらに、頻繁に強制再生を実行すると強制再生の実行に際して使用される燃料によってエンジンオイルが希釈される所謂オイルダイリューションを生じるため、それを防止することができる。
この併用の際に、アッシュは主としてエンジンオイル中の金属系添加剤に起因する成分を含むため使用するエンジンオイルの種類が変わるとエンジンオイルの消費量から推定する手法では、精度良いアッシュ堆積量の推定が困難になるおそれがあるが、DPF差圧から推定した洗浄要求閾値の判定を優先して出力することで、エンジンオイルの変更時においてもアッシュ洗浄要求の報知精度を維持できる。
このように、補正差圧を用いることで、堆積量推定精度を高めることができる。すなわち、同一堆積量であっても、差圧は排ガス体積流量により変化するため、計測時の排ガス体積流量を基準状態の基準ガス流量に補正して、その基準ガス流量における差圧を補正差圧として算出する。
かかる第3発明によれば、アッシュ管理サーバからの情報に基づいて、最寄りのサービス工場、およびサービス作業が可能なカレンダー情報を入手し、さらに車載端末器からアッシュ管理サーバへサービス工場および作業依頼の日時を送信可能にするので、アッシュ洗浄をサービス工場で効率的に行うことができる。
図1に示すように、ディーゼルエンジン(以下エンジンという)1の排気通路3には、DOC(前段酸化触媒)5と該DOC5の下流側にPM(排気微粒子)を捕集するDPF(ディーゼルパティキュレートフィルター)7とからなる排ガス後処理装置9が設けられている。
このDOC(前段酸化触媒)5は、排ガス中の炭化水素(HC)や一酸化炭素(CO)を無害化するとともに、排ガス中のNOをNO2に酸化して、DPF7で捕集されたスートを燃焼除去するする機能や、DPF7に捕集されたスートを強制再生する場合に排ガス中の未燃燃料成分の酸化反応熱により排ガス温度を上昇させる機能を有する。
さらにエンジン回転数信号45、燃料噴射量信号47、がそれぞれ取りこまれるようになっている。
以上の構成において、本発明の再生制御装置19について説明する。このDPF7の再生制御装置19には、図1に示すように、DPF7の前後差圧を検出する差圧センサ39からの差圧値を、一定の運転状態の差圧に補正するDPF差圧補正手段49が設けられ、DPF差圧補正手段49によって補正差圧が算出される。
すなわち、同一堆積量であっても、差圧は排ガス体積流量により変化するため、計測時の排ガス体積流量を基準状態の基準ガス流量に補正して、その基準ガス流量における差圧を補正差圧として算出する。この補正差圧を算出して用いることで、アッシュ堆積量の推定精度を高めることができる。
本発明においては、洗浄要求に対して洗浄を行わずにアッシュが許容限界値を超えてしまった場合には、排ガス温度が限界範囲を超えるため、さらに排ガス性能が悪化するため、許容補正差圧以上になると出力を低下していくフェイルセーフ機能が働く。このとき何の前触れもなくフェイルセーフ機能が働くのは望ましくないため予め警報するものである。
次に、ステップS4で、DPF補正差圧が出力低下警告閾値P2以上かを判定する。以上でない場合にはステップS6に進んで終了し、出力低下警告閾値P2以上の場合には、ステップS5に進んで出力低下を警告する。なお、図2(a)に示すフローは所定の周期で繰り返される。
また、アッシュ洗浄要求閾値P1と出力低下警告閾値P2との関係は、図2(b)のようにP1<P2の関係になっている。
このように、アッシュ堆積量だけ検出するのではなく、合計堆積量のDPF差圧を検出することで、そこに含まれるアッシュ堆積量の増加状態を精度よく判定して報知、警告できるようになる。
従って、特別なセンサを設けることなく、簡単な方法によって精度よくアッシュ堆積量を推定できるとともに、アッシュの洗浄要求を作業者に正確に報知できる。
次に、図4~図6を参照して、第2実施形態の再生制御装置70について説明する。この第2実施形態は、第1実施形態に対して、図4に示すように、手動再生報知手段72および手動強制再生手段74を設けたことが特徴である。その他の構成については第1実施形態と同一である。
しかし、警告解除禁止閾値T1以内のT2に再びアッシュ洗浄要求閾値P1を超えた場合には、強制再生の実行に際して使用される燃料によってエンジンオイルが希釈される所謂オイルダイリューションが生じるため、強制再生を禁止して、ステップS18に進んでアッシュ洗浄要求の出力をONにする。この場合、アッシュ洗浄が実行されるまでアッシュ洗浄要求解除を禁止する。
従って、DPF7の洗浄要求報知の信頼性を高めることができる。また、手動強制再生によってサービス工場に運んでのDPF洗浄作業のタイミングを調整できる。
所定時間以内に狭まる場合には、真にアッシュ洗浄が必要になったため、手動強制再生は実行せずに、洗浄要求を報知して、洗浄要求の報知の信頼性を高めることができる。
さらに、頻繁に強制再生を実行すると強制再生の実行に際して使用される燃料によってエンジンオイルが希釈される所謂オイルダイリューションを生じるため、それを防止することができる。
次に、図7~図10を参照して、第3実施形態の再生制御装置80について説明する。この第3実施形態は、第1実施形態に対して、図7に示すように、アッシュ堆積量推定手段84が設けられている。すなわち、第1実施形態で説明した、DPF差圧補正手段49と、DPF差圧設定手段51と、洗浄要求報知手段53と、出力低下警報手段55とからなる差圧堆積量推定手段82とともに、エンジンオイルの消費量と相関関係を有する指標によってDPFのアッシュ堆積量を推定するアッシュ堆積量推定手段84をさらに備えることを特徴とする。その他の構成については第1実施形態と同一である。
同様に、燃料消費量積算部88による燃料消費量の積算値をパラメータとした所定の1次関数式Y=F2(X)によって、オイル消費量を算出する第2オイル消費量推定部94が設けられ、さらに、運転時間積算部90による運転時間の積算値をパラメータとした所定の1次関数式Y=F3(X)によって、オイル消費量を算出する第3オイル消費量推定部96が設けられている。
エンジン回転数の積算値、燃料消費量の積算値、運転時間の積算値は、オイル消費量に相関するものであり、アッシュはすでに説明したように、主としてエンジンオイル中の金属系添加剤に起因する成分を含むため、エンジンオイル量に相関することから、これらパラメータによる1次関数式を用いてエンジンオイル量を推定することでアッシュ堆積量を推定する。
なお、1次関数式Y=F1(X)、Y=F2(X)、Y=F3(X)、さらにY=F4(X)については、予め試験、または計算によって関係式を算出しておく。
まず開始すると、ステップS32で、アッシュ堆積量推定手段84によって算出されたアッシュ堆積値が、アッシュ洗浄要求閾値A1以上かを判定し、以上の場合にはステップS34でアッシュ洗浄要求を報知する。ステップS32がNOの場合には、ステップS33で、DPF差圧補正手段49によって算出されたDPF補正差圧が、アッシュ洗浄要求閾値P1以上かを判定して、以上の場合にはステップS34でアッシュ洗浄要求を報知する。
併用の際に、アッシュは主としてエンジンオイル中の金属系添加剤に起因する成分を含むため使用するエンジンオイルの種類が変わると精度良いアッシュ堆積量の推定が困難になるおそれがあるが、差圧堆積量推定手段82による、DPF差圧から推定した洗浄要求閾値の判定を優先して出力することで、エンジンオイルの変更時においてもアッシュ洗浄要求の報知精度を維持できる。
すなわち、DPF差圧によるアッシュ堆積量の推定がアッシュ洗浄要求閾値P1に達したときの判定を優先して洗浄要求を出力するとともに、最終的にDPF差圧によるアッシュ堆積量の推定が出力低下警告閾値P2に達したときの判定を最終的な判定としていることからも分かる。
次に、図11を参照して、第4実施形態のDPFの再生支援システムについて説明する。この第4実施形態は、図11に示すように、第1実施形態~第3実施形態で説明した再生制御装置19(70、80)を備え、該再生制御装置19には、アッシュ管理サーバ103と通信可能な車載端末器105が接続可能に構成されている。
そして、アッシュ管理サーバ103内には、各サービス工場(F1、F2、…Fn)の所在地データが格納されたサービス工場データベース107、各サービス工場の稼働日、さらにアッシュ洗浄作業可能なカレンダー情報を格納したカレンダーデータベース109を有している。
すなわち、DPF7を手動によって強制再生させてスート分を燃焼除去することで、一時的にDPF差圧を低下させ、改めてDPF差圧が洗浄要求閾値に達したときの洗浄要求報知を待って、サービス工場に搬入するようにできる。
従って、サービス工場への搬入可能なスケジュールを、再度洗浄要求閾値に達する時期を予測して更新されたサービス工場およびカレンダー情報を基に予め調整できるようになる。
従って、アッシュ管理サーバ103からの情報に基づいて、最寄りのサービス工場、およびサービス作業が可能なカレンダー情報を入手し、さらに車載端末器105からアッシュ管理サーバ103へサービス工場および作業依頼の日時を送信可能にするので、アッシュ洗浄をサービス工場で効率的に行うことができる。
次に、図12を参照して、第5実施形態のDPFの再生支援システムについて説明する。この第5実施形態は、図12に示すように、第3実施形態で説明した再生制御装置80を備え、この再生制御装置80は、車載端末器105を介してアッシュ管理サーバ120と通信可能に構成されている。
このアッシュ管理サーバ120には、第4実施形態のカレンダーデータベース109、サービス工場データベース107、さらにメンテナンスデータベース122、学習手段124を有している。
学習手段124で更新される関係式は、第3実施形態で説明した第1オイル消費量推定部92におけるエンジン回転数の積算値をパラメータとした所定の1次関数式Y=F1(X)、第2オイル消費量推定部94における燃料消費量の積算値をパラメータとした所定の1次関数式Y=F2(X)、および第3オイル消費量推定部96における運転時間の積算値をパラメータとした所定の1次関数式Y=F3(X)、およびオイル消費量からアッシュ堆積量を算出する算出式Y=F4(X)が更新される。
Claims (10)
- 排気通路に排気微粒子(PM)を捕集するディーゼルパティキュレートフィルター(DPF)を備え、該DPFに捕集されたPMを強制再生する強制再生手段を備えたDPFの再生制御装置において、
DPFの前後差圧を検出する差圧検出手段と、
スート分とアッシュ分との合計の堆積量によって生じるDPF差圧が予め試験または計算によって設定され、アッシュ堆積量が洗浄を必要とする堆積量に対するDPF差圧を洗浄要求閾値として設定し、前記アッシュ堆積量が前記洗浄を要求する堆積量より多く堆積し出力低下を必要とする堆積量に対するDPF差圧を出力低下閾値として設定するDPF差圧設定手段と、
前記DPF差圧が前記洗浄要求閾値に達したかどうかを判定し達している場合には洗浄要求を出力する洗浄要求報知手段と、
前記DPF差圧が前記洗浄要求閾値より大きい前記出力低下閾値に達したかどうかを判定し達している場合には出力低下を警報する出力低下警報手段と、
を備えたことを特徴とするDPFの再生制御装置。 - 前記洗浄要求閾値に達したときに、アッシュ洗浄要求を報知する前にDPFの手動強制再生を促す手動再生報知手段を設けたことを特徴とする請求項1記載のDPFの再生制御装置。
- 前記手動強制再生が完了した後に再度前記洗浄要求閾値に達したときに、手動強制再生の完了から所定時間以内の場合には手動強制再生は実行せずに洗浄要求の報知を行うことを特徴とする請求項2記載のDPFの再生制御装置。
- エンジンオイルの消費量と相関関係を有する指標によってDPFのアッシュ堆積量を推定するアッシュ堆積量推定手段をさらに備え、該アッシュ堆積量推定手段によって算出された堆積量の推定値が洗浄を必要とする堆積量に達していない場合であっても、前記DPF差圧が前記洗浄要求閾値に達したときに洗浄要求を出力することを特徴とする請求項1記載のDPFの再生制御装置。
- 前記差圧検出手段よって検出された差圧を一定の運転状態の差圧に補正するDPF差圧補正手段を備え、前記DPF差圧が前記DPF差圧補正手段によって補正された補正差圧を用いることを特徴とする請求項1記載のDPFの再生制御装置。
- 排気通路に排気微粒子(PM)を捕集するディーゼルパティキュレートフィルター(DPF)を備え、該DPFに捕集されたPMを強制再生する強制再生手段を備えたDPFの再生制御方法において、
スート分とアッシュ分との合計の堆積量によって生じるDPF差圧が予め試験または計算によって設定し、
アッシュ堆積量が洗浄を必要とする堆積量に対するDPF差圧を洗浄要求閾値として設定し、
前記アッシュ堆積量が前記洗浄を要求する堆積量より多く堆積し出力低下を必要とする堆積量に対するDPF差圧を出力低下閾値として設定し、
前記DPF差圧が前記洗浄要求閾値に達したかどうかを判定し、達している場合には洗浄要求を出力する洗浄要求報知ステップと、
前記DPF差圧が前記洗浄要求閾値より大きい出力低下閾値に達したかどうかを判定し、達している場合には出力低下を警報する出力低下警報ステップと、
を有したことを特徴とするDPFの再生制御方法。 - 請求項1乃至5のいずれか1項記載のDPFの再生制御装置を備え、該再生制御装置はアッシュ管理サーバと通信可能な車載端末器に接続され、前記アッシュ管理サーバにはサービス工場の所在地、各サービス工場の作業可能なカレンダー情報を格納したデータベースを有し、前記再生制御装置の洗浄要求報知手段によって洗浄要求が報知されたときに、前記車載端末器は前記アッシュ管理サーバからアッシュ洗浄可能な最寄りのサービス工場及び作業可能カレンダー情報を入手して車載端末器に表示することを特徴とするDPFの再生支援システム。
- 前記再生制御装置には、前記洗浄要求閾値に達したときに、アッシュ洗浄要求を報知する前にDPFの手動強制再生を促す手動再生報知手段が設けられ、該手動再生報知手段の報知後に手動再生が実行されたとき、その後再度洗浄要求閾値に達する時期を予測して、前記作業可能カレンダー情報を更新して表示することを特徴とする請求項7に記載のDPFの再生支援システム。
- 前記車載端末器に表示されたサービス工場及び作業可能カレンダー情報を基に、該車載端末器にサービス工場の指定、および作業依頼日時を入力可能にし、該車載端末器から前記アッシュ管理サーバへ作業依頼情報が送信されることを特徴とする請求項7または8記載のDPFの再生支援システム。
- 請求項4記載のDPFの再生制御装置を備え、該再生制御装置はアッシュ管理サーバと通信可能な車載端末器に接続され、前記アッシュ管理サーバにはアッシュ洗浄時に洗浄したアッシュ量、洗浄時までの累積運転時間、累積燃料消費量、および累積エンジン回転数のデータを蓄積するメンテナンスデータベースを有し、洗浄時のアッシュ量および再生制御装置から読み取った前記累積運転時間、累積燃料消費量、および累積エンジン回転数のデータを、前記車載端末器から前記アッシュ管理サーバのメンテナンスデータベースに送信して蓄積し、該蓄積した最新のデータを基に、前記アッシュ堆積量推定手段に設定される関係式を更新する学習手段を有し、該更新された新たな関係式が前記車載端末器を介して前記アッシュ堆積量推定手段に設定されることを特徴とするDPFの再生支援システム。
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JP5562697B2 (ja) | 2014-07-30 |
JP2011202573A (ja) | 2011-10-13 |
US8919105B2 (en) | 2014-12-30 |
CN102782267A (zh) | 2012-11-14 |
EP2525056A4 (en) | 2016-05-25 |
KR20120112850A (ko) | 2012-10-11 |
CN102782267B (zh) | 2015-01-28 |
US20130000282A1 (en) | 2013-01-03 |
EP2525056A1 (en) | 2012-11-21 |
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