WO2004016915A1 - 排気ガス浄化装置 - Google Patents
排気ガス浄化装置 Download PDFInfo
- Publication number
- WO2004016915A1 WO2004016915A1 PCT/JP2003/010129 JP0310129W WO2004016915A1 WO 2004016915 A1 WO2004016915 A1 WO 2004016915A1 JP 0310129 W JP0310129 W JP 0310129W WO 2004016915 A1 WO2004016915 A1 WO 2004016915A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- exhaust gas
- differential pressure
- amount
- ash
- Prior art date
Links
Classifications
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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
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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
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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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
- F01N3/0231—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 using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
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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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
-
- 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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1606—Particle filter loading or soot amount
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
- F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/10—Residue burned
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/30—Exhaust treatment
Definitions
- the present invention relates to an exhaust gas purification device. Background Technology ⁇
- the filter when it is estimated that the accumulated amount of particulates in the filter has reached a predetermined level, the filter is heated or the like to incinerate the particulates. The filter is regenerated and the filter is used repeatedly.
- incinerated ash ash
- residual ash accumulates every time the filter is regenerated. Exhaust gas effluent will be hindered by residual ash.
- the differential pressure between the pressure on the inlet side and the pressure on the outlet side of the filter is measured, and based on the measured differential pressure value before and after the filter.
- the residual amount of the ash in the filter is estimated by using this method, and the life of the filter is determined based on the estimation result.
- the regeneration process is interrupted for some reason after the filter regeneration process is started, and unincinerated particulates are generated within the filter. If it remains, even if the differential pressure across the filter is measured after the end of the regeneration process, it is not possible to accurately estimate the ash residue due to the unburned particulates. For this reason, there have been many cases in which it has not been possible to correctly judge the replacement time of the festival.
- An object of the present invention is to provide an exhaust gas purifying apparatus capable of solving the above-mentioned problems in the prior art.
- An object of the present invention is to provide an exhaust gas purifying apparatus capable of accurately grasping the amount of ash remaining in a filter.
- An object of the present invention is to provide an exhaust gas purifying apparatus capable of replacing a filter at an appropriate timing. Disclosure of the invention
- the filter includes a filter for collecting a particulate contained in exhaust gas of an internal combustion engine, and differential pressure detecting means for detecting a differential pressure across the filter.
- An exhaust gas purifying device configured to control regeneration of the filter based on the temperature difference detecting means for detecting a temperature difference between an inlet side and an outlet side of the filter; and the temperature difference detecting means.
- a determination means for determining a regeneration end timing of the filter in response to the output of the differential pressure detecting means in response to the determination of the regeneration end timing of the filter by the determination means.
- the ash residual amount is estimated by measuring the differential pressure before and after the filter, the ash residual amount can be accurately estimated without including the unburned paticle, and the time to replace the filter can be correctly determined. it can.
- FIG. 1 is a configuration diagram showing an example of an embodiment in which an exhaust gas purification device according to the present invention is applied to a diesel engine.
- FIG. 2 is a block diagram showing a configuration of the filter control unit shown in FIG.
- FIG. 3 is a flow chart showing a program for executing arithmetic processing in the second processing unit.
- FIG. 4 is a graph for explaining the operation of the filter control unit. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is an overall configuration diagram showing one embodiment when an exhaust gas purifying apparatus according to the present invention is applied to a diesel engine.
- Reference numeral 1 denotes a four-cylinder diesel engine, and cylinders 2 to 5 are provided with injectors 6 to 9, respectively.
- the operation of these injectors 6 to 9 is controlled by the engine control unit 10 and has a known configuration in which high-pressure fuel can be injected and supplied into the corresponding cylinder at the required timing by the required amount. .
- the intake duct 12 connected to the intake manifold 11 is provided with an air cooler 13 and an air cleaner 14, while the exhaust duct connected to the exhaust manifold 15 is provided.
- An exhaust gas purifying device 30 is provided at the point 16.
- An exhaust recirculation path 18 provided with an EGR control valve 17 is provided between the intake duct 12 and the exhaust duct 16 and is an actuator controlled by the engine control unit 10.
- the opening degree of the EGR control valve 17 is adjusted by 19.
- Reference numeral 20 denotes an exhaust turbocharger, which is disposed in the exhaust duct 16 and the exhaust turbine 21 and is disposed in the intake duct 12 and is driven by the exhaust bin 21.
- Compressor 22 is used.
- the exhaust gas purifying device 30 includes an oxidation catalyst 31 and a filter 32 for collecting particulates. The exhaust gas flowing through the exhaust duct 16 flows first to the oxidation catalyst 31, and then to the filter 3.
- the oxidation catalyst 31 was prepared by coating a surface of a carrier made of, for example, honeycomb-shaped cordierite or heat-resistant steel with active alumina or the like to form a washcoat layer, and supporting an appropriate catalytically active component on the coat layer. It has a configuration. Oxidation catalyst oxidizes NO in the exhaust gas together to produce N 0 2, is to oxidize the HC and C 0 in the exhaust gas is configured to produce H 2 0 and C 0 2.
- the filter 32 is a so-called wall flow type honeycomb in which a large number of cells are formed in parallel with, for example, porous cordierite or silicon carbide, and the inlets and outlets of the cells are alternately closed.
- a first pressure sensor 33 and a second pressure sensor 34 for detecting the pressure of the exhaust gas are provided on the inlet side (front) and the outlet side (rear) of the filter 32, respectively.
- the first pressure sensor 33 outputs a first pressure signal S 1 indicating the exhaust gas pressure P 1 on the inlet side of the filter 32
- the second pressure sensor 34 outputs exhaust gas on the outlet side of the filter 32.
- a second pressure signal S2 indicating the pressure P2 is output.
- a first temperature sensor 36 and a second temperature sensor 3 for detecting the temperature of the exhaust gas are provided on the inlet side (front) and the outlet side (rear) of the filter 32, respectively. I have.
- the first temperature sensor 36 outputs a first temperature signal S3 indicating the temperature T1 on the inlet side of the filter 32
- the second temperature sensor 37 indicates the temperature T2 on the outlet side of the filter 32.
- the second temperature signal S4 is output.
- Reference numeral 35 denotes a flow sensor for detecting the flow rate of the exhaust gas flowing in the exhaust duct 16.
- the exhaust flow signal F from the flow sensor 35 is a first pressure signal S 1, It is input to the filter control unit 40 together with the second pressure signal S2, the first temperature signal S3, and the second temperature signal S4.
- the filter control unit 40 is an element constituting the exhaust gas purification device 30. H
- the filter control unit 40 is configured as a computer control system using a microcomputer 40A.
- the accumulation amount of the particulates collected by the filter 32 is estimated, and a filter control for regenerating the filter 32 is performed based on the estimation result.
- the filter control unit 40 also estimates the residual amount of the ash in the filter 32 when the regeneration of the filter 32 is completed, and prompts the replacement of the filter 32 based on the estimation result of the residual amount of the ash. Is performed.
- FIG. 2 is a block diagram functionally showing the configuration of the filter control unit 40.
- the filter control unit 40 includes a first processing unit 41 for estimating the amount of accumulation of the particulates collected by the filter 32 and determining whether or not to perform the filter regeneration process; After confirming whether or not the regeneration of 32 has been completed, there is a second processing unit 42 for estimating the residual amount of the ash stored in the filter 32 and determining the time to replace the filter 32. are doing.
- the first processing unit 41 determines that the filter 32 should be reproduced, the first processing unit 41 outputs a reproduction start signal K 1, and the reproduction start signal K 1 is transmitted to the second processing unit 42. It is sent to the playback control section 43.
- the first pressure signal S 1, the second pressure signal S 2, the first temperature signal S 3, and the second temperature signal S 4 are input to the second processing unit 42.
- the regeneration of the filter 32 is performed.
- a reproduction end signal K 2 is output in response to the determination, and the reproduction end signal K 2 is output to the reproduction control unit 43.
- Sent to In the second processing unit 42 it is determined that the estimated value of the ash residual amount has reached a predetermined level. Then, the second processing unit 42 outputs a replacement warning signal K3 for prompting the replacement of the filter and sends it to the display unit 44.
- the display unit 44 prompts the driver to replace the filter. The message is displayed in an appropriate form.
- the regeneration control unit 43 responds to the regeneration start signal K 1 and responds to the engine control unit 10 as a signal for controlling engine operation so as to increase the exhaust gas temperature for regeneration of the filter 32. Outputs the playback control signal CS.
- the engine control unit 10 responds to the regeneration control signal CS from the regeneration control unit 43 and greatly delays the fuel injection timing so that the fuel injection timing is at the compression top dead center of each cylinder.
- the fuel injection is controlled so as to be later than that, thereby raising the temperature of the exhaust gas to a temperature required for burning the particulates.
- the regeneration end signal K2 is input to the regeneration controller 43, the output of the regeneration control signal CS is stopped, and the engine control unit 10 stops the engine control for the filter regeneration control. The operation returns to the operation control operation.
- reference numeral 45 denotes EEPROM for storing required data among the data obtained in the second processing unit 42.
- FIG. 3 is a flowchart showing an arithmetic processing program for executing required arithmetic processing in the second processing section 42.
- This arithmetic processing program is executed by the microcomputer 40A. The execution is started in response to the input of the reproduction start signal K1.
- step S11 a first temperature signal S3 indicating the temperature T1 before the filter 32 (the inlet side) of the filter 32 and a second temperature signal S2 indicating the temperature T2 after the filter 32 (the outlet side).
- a temperature difference ⁇ ⁇ ( ⁇ T 1 ⁇ T 2) between the inlet side and the outlet side of the filter 32 is calculated, and the process proceeds to step S 12.
- step S12 the regeneration control signal CS is output in response to the regeneration start signal K1, whereby the exhaust gas temperature rises and the particulates deposited on the filter 32 burn, and the particulates are reduced. Based on the fact that exhaust gas temperature will drop slightly when passing through the filter if it has been completely burned, it is necessary to determine whether the particulate has completely burned. Of the Up.
- Steps S11 and S12 are repeatedly performed until the temperature difference ⁇ becomes larger. If the temperature difference ⁇ is larger than M, it is determined that the burning of the particulates has been completed, and the determination result in step S12 is YES, and the process proceeds to step S13. It should be noted that the value of M can be appropriately determined by experiments and the like.
- step S13 a process of outputting a reproduction end signal K2 for ending the reproduction of the filter 32 is performed.
- the filter residual amount accumulated in the filter 32 is estimated based on the pressure difference before and after the filter 32 (the pressure difference between the inlet side and the outlet side of the filter 32).
- the value of the differential pressure ⁇ P for estimating the residual amount of ash, which is obtained every time the regeneration of the filter 32 ends, is stored in the EEPROM 45 each time.
- step S15 the differential pressure ⁇ (n) for the ash residue estimation calculated this time is compared with the differential pressure ⁇ (n-1) for the ash residue estimation calculated previously, It is determined whether or not the difference value ⁇ ( ⁇ ) - ⁇ (n-1) is smaller than a predetermined value K.
- K indicates the upper limit of the amount of ash residue that increases by one regeneration. If ⁇ (n)- ⁇ (n-1) K, the ash residue increased by the current regeneration Since the amount is equal to or less than K and the value of ⁇ (n) is a valid value, the determination result of step S15 is YES, and the process enters step S16.
- step S16 it is determined whether or not the differential pressure ⁇ (n) is equal to or greater than a predetermined differential pressure threshold PX.
- the differential pressure threshold value PX indicates the level of the differential pressure ⁇ P before and after the residual amount of ash stored in the filter 32 requires replacement of the filter. If ⁇ (n) ⁇ PX, the step The determination result of S16 is YE S, and the process proceeds to step S17, where a replacement warning for urging filter replacement is provided. Outputs signal 3.
- step S18 processing for storing the differential pressure ⁇ P (n) obtained this time in step S14 in the EEPROM 45 is performed, and the execution of this program ends.
- step S 16 when ⁇ (n) is smaller than PX, the residual amount of ash stored in the filter 32 is lower than the level at which the filter needs to be replaced. The answer is NO, and the program enters step S18 without executing step S17.
- step S14 a process for storing the differential pressure ⁇ P (n) obtained this time in the EEPROM 45 is performed. Is completed.
- step S15 if ⁇ (n) — ⁇ (n-1) ⁇ K, the ash residue increased by the current regeneration is larger than ⁇ , so that ⁇ ⁇ ⁇ ( ⁇ ) obtained this time It is determined that there is a problem in the reliability of the value, and the determination result in step S15 is NO, and the process proceeds to step S19. That is, if it is determined in step S15 that ⁇ ( ⁇ ) - ⁇ P (n-1) ⁇ K, there is a high possibility that unburned particulates remain in the filter 32. It is considered that the differential pressure across the filter 32 is caused by the residual ash and the unburned paticle. Therefore, it is determined that it is not possible to estimate an accurate ash residual amount based on the present differential pressure ⁇ ( ⁇ ), the previous differential pressure ⁇ ( ⁇ -1) is stored in the EEPROM 45, and the program Terminate execution.
- FIG. 4 is a graph showing the state of the change in the differential pressure ⁇ P over time, with the horizontal axis representing time t and the vertical axis representing the differential pressure ⁇ P across the filter 32.
- the patikilet accumulates on the filter 32 and the differential pressure across the filter 32 increases, and at time the first processing unit 41 determines that the differential pressure ⁇ has reached the predetermined value PA.
- the first processing section 41 outputs a reproduction start signal K1.
- the reproduction control signal CS is output from the reproduction control unit 43 in response to the reproduction start signal K1, and the reproduction process of the filter 32 is started. As a result, the patikilet burns and the differential pressure across the filter 32 decreases. I do.
- the second processing unit 44 determines that the regeneration of the filter 32 has been completed, the second processing unit 44 returns to the regeneration control unit 4.
- the reproduction end signal K 2 is output to 3, and the reproduction processing of the filter 32 ends.
- the differential pressure ⁇ P is a value P a (> 0) corresponding to the ash residual amount.
- this value Pa is smaller than a predetermined value K, and if Pa is smaller, it is determined that there is no unburned residue, and it is determined that the ash residual amount corresponding to the value Pa is in the filter 32. Is done.
- the filter control unit 40 repeats the above-described operation, the pressure difference ⁇ ⁇ across the filter 32 changes as shown by the solid line, and the filter 32 changes the pressure difference ⁇ P ⁇ PX even after the regeneration process.
- the replacement warning signal K3 is output from the second processing unit 42, and the replacement of the filter 32 is prompted.
- the residual amount of the ash accumulated in the filter is estimated, so that the unburned particulates are not included.
- the residual amount of the ash can be accurately estimated, and the time to replace the filter can be correctly determined.
- the differential pressure across the filter at the end of filter regeneration is used as a reference value for determining the next filter regeneration start time, it is possible to more accurately estimate the amount of particulate accumulation on the filter. As a result, the filter regeneration start time can be correctly determined. Further, the ash residual amount can be fed back to the engine control to be used for fuel injection amount correction and intake air amount / pressure control.
- the exhaust gas purifying apparatus according to the present invention is useful for appropriately determining the filter replacement time.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020047007189A KR100588897B1 (ko) | 2002-08-12 | 2003-08-08 | 배기 가스 정화 장치 |
US10/492,025 US7264642B2 (en) | 2002-08-12 | 2003-08-08 | Exhaust gas cleaning apparatus |
EP03788058A EP1529930B1 (en) | 2002-08-12 | 2003-08-08 | Exhaust gas cleaner |
AU2003257818A AU2003257818A1 (en) | 2002-08-12 | 2003-08-08 | Exhaust gas cleaner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002234582A JP3869333B2 (ja) | 2002-08-12 | 2002-08-12 | 排気ガス浄化装置 |
JP2002/234582 | 2002-08-12 |
Publications (1)
Publication Number | Publication Date |
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WO2004016915A1 true WO2004016915A1 (ja) | 2004-02-26 |
Family
ID=31884351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/010129 WO2004016915A1 (ja) | 2002-08-12 | 2003-08-08 | 排気ガス浄化装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7264642B2 (ja) |
EP (1) | EP1529930B1 (ja) |
JP (1) | JP3869333B2 (ja) |
KR (1) | KR100588897B1 (ja) |
CN (1) | CN100335756C (ja) |
AU (1) | AU2003257818A1 (ja) |
WO (1) | WO2004016915A1 (ja) |
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WO2006064671A1 (ja) * | 2004-12-13 | 2006-06-22 | Bosch Corporation | ディーゼル機関のための排気浄化装置 |
FR2879244B1 (fr) * | 2004-12-14 | 2007-03-16 | Renault Sas | Dispositif de commande de la regeneration d'un filtre a particules pour moteur a combustion interne et procede correspondant. |
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JP2009138704A (ja) * | 2007-12-10 | 2009-06-25 | Mitsubishi Fuso Truck & Bus Corp | 排気後処理装置 |
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JP5088391B2 (ja) * | 2010-03-09 | 2012-12-05 | トヨタ自動車株式会社 | パティキュレートフィルタの故障判別装置 |
US8577541B2 (en) * | 2010-10-01 | 2013-11-05 | Deere & Company | Particulate filter ash loading prediction method and vehicle using same |
US8660741B2 (en) * | 2010-10-01 | 2014-02-25 | Deere & Company | Particulate filter ash loading prediction method and vehicle with same |
US8214135B2 (en) * | 2010-10-01 | 2012-07-03 | Deere & Company | Particulate filter ash loading prediction method and vehicle using same |
DE102011015061A1 (de) * | 2011-03-24 | 2012-09-27 | Mann + Hummel Gmbh | Verfahren und Vorrichtung zur Dosierung des Additivs zur Regenerierung eines Dieselpartikelfilters |
US8398742B2 (en) * | 2011-05-19 | 2013-03-19 | GM Global Technology Operations LLC | Pressure sensor disconnection detection systems and methods |
JP6197377B2 (ja) * | 2013-06-03 | 2017-09-20 | いすゞ自動車株式会社 | 排気浄化装置 |
GB2525354B (en) * | 2015-08-13 | 2016-08-24 | Gm Global Tech Operations Llc | A method of controlling a particulate filter |
DE102017211575B4 (de) * | 2017-07-06 | 2019-07-04 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Diagnose eines Differenzdrucksensors eines Partikelfilters |
JP6932673B2 (ja) | 2018-06-26 | 2021-09-08 | 株式会社クボタ | ディーゼルエンジンの排気処理装置 |
FR3085424A1 (fr) * | 2018-09-04 | 2020-03-06 | Psa Automobiles Sa | Procede d’estimation d’une masse de residus dans un filtre a particules |
KR101941824B1 (ko) * | 2018-11-08 | 2019-01-23 | 정갑철 | 매연 여과 장치 |
CN111322143B (zh) * | 2020-02-26 | 2021-08-20 | 潍柴动力股份有限公司 | 柴油机颗粒捕集器的诊断方法、云端服务器及车载终端 |
CN111637605A (zh) * | 2020-05-20 | 2020-09-08 | 三菱重工海尔(青岛)空调机有限公司 | 空调清洗方法、计算机可读介质以及空调器 |
JP7384114B2 (ja) | 2020-05-29 | 2023-11-21 | いすゞ自動車株式会社 | フィルタ状態検知装置 |
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2003
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- 2003-08-08 AU AU2003257818A patent/AU2003257818A1/en not_active Abandoned
- 2003-08-08 WO PCT/JP2003/010129 patent/WO2004016915A1/ja active Application Filing
- 2003-08-08 CN CNB038012669A patent/CN100335756C/zh not_active Expired - Fee Related
- 2003-08-08 KR KR1020047007189A patent/KR100588897B1/ko not_active IP Right Cessation
- 2003-08-08 EP EP03788058A patent/EP1529930B1/en not_active Expired - Fee Related
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CN110935249A (zh) * | 2018-09-25 | 2020-03-31 | 莱芜钢铁集团电子有限公司 | 一种空气过滤器自洁控制方法及装置 |
Also Published As
Publication number | Publication date |
---|---|
AU2003257818A1 (en) | 2004-03-03 |
CN1568400A (zh) | 2005-01-19 |
JP2004076605A (ja) | 2004-03-11 |
JP3869333B2 (ja) | 2007-01-17 |
EP1529930A1 (en) | 2005-05-11 |
KR100588897B1 (ko) | 2006-06-12 |
KR20040066810A (ko) | 2004-07-27 |
EP1529930B1 (en) | 2011-10-12 |
CN100335756C (zh) | 2007-09-05 |
US20040211159A1 (en) | 2004-10-28 |
US7264642B2 (en) | 2007-09-04 |
EP1529930A4 (en) | 2010-06-30 |
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