WO2013105423A1 - 建設機械 - Google Patents
建設機械 Download PDFInfo
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- WO2013105423A1 WO2013105423A1 PCT/JP2012/083372 JP2012083372W WO2013105423A1 WO 2013105423 A1 WO2013105423 A1 WO 2013105423A1 JP 2012083372 W JP2012083372 W JP 2012083372W WO 2013105423 A1 WO2013105423 A1 WO 2013105423A1
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- WIPO (PCT)
- Prior art keywords
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- estimated
- engine
- particulate matter
- filter
- Prior art date
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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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- 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
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
- E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
- E02F3/325—Backhoes of the miniature type
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2062—Control of propulsion units
- E02F9/2066—Control of propulsion units of the type combustion engines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2095—Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/26—Indicating devices
- E02F9/267—Diagnosing or detecting failure of vehicles
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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
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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
- F01N3/02—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
- F01N3/0235—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 exhaust gas throttling means
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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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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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
- F01N13/008—Mounting or arrangement of exhaust sensors in or on 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/36—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an exhaust flap
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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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/04—Filtering activity of particulate filters
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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
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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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
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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
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
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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
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
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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
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0412—Methods of control or diagnosing using pre-calibrated maps, tables or charts
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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
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0422—Methods of control or diagnosing measuring the elapsed time
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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
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
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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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0614—Actual fuel mass or fuel injection amount
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0812—Particle filter loading
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/0245—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by increasing temperature of the exhaust gas leaving the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
- F02D41/405—Multiple injections with post injections
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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
Definitions
- the present invention relates to a construction machine equipped with an exhaust gas purifying apparatus suitably used for removing harmful substances from exhaust gas such as a diesel engine.
- a construction machine such as a hydraulic excavator or a hydraulic crane is capable of a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and can be raised and lowered on the front side of the upper revolving body.
- the upper swing body has an engine for driving a hydraulic pump at the rear of the swing frame, and a cab, a fuel tank, a hydraulic oil tank, and the like are mounted on the front side of the swing frame.
- a diesel engine is generally used as an engine serving as a prime mover for construction machinery.
- the exhaust gas discharged from such a diesel engine may contain harmful substances such as particulate matter (PM) and nitrogen oxides (NOx).
- the construction machine is provided with an exhaust gas purification device that purifies the exhaust gas in an exhaust pipe that forms an exhaust gas passage of the engine.
- An exhaust gas purifying device is an oxidation catalyst (for example, Diesel Oxidation Catalyst, abbreviated as DOC) that oxidizes and removes nitrogen monoxide (NO), carbon monoxide (CO), hydrocarbon (HC), and the like contained in exhaust gas. And a particulate matter removal filter (for example, Diesel Particulate Filter, also called DPF for short) that is arranged downstream of the oxidation catalyst and collects and removes particulate matter in the exhaust gas.
- Diesel Oxidation Catalyst abbreviated as DOC
- the particulate matter removing filter in the particulate matter removing filter, the particulate matter is deposited on the filter as the particulate matter is collected, thereby clogging the filter. For this reason, it is necessary to regenerate the filter by removing the particulate matter from the filter when a certain amount of the particulate matter is collected.
- the regeneration of the filter can be performed by increasing the temperature of the exhaust gas by, for example, performing fuel injection for regeneration processing called post injection and burning the particulate matter deposited on the filter.
- the regeneration process is performed in a state where particulate matter is excessively accumulated on the filter, the temperature of the exhaust gas becomes excessively high (the combustion temperature of the particulate matter becomes excessively high) and the filter is melted. There is a fear. Therefore, according to the conventional technique, the amount of particulate matter collected by the filter is estimated, and the regeneration process is performed before the estimated amount of collection is excessive.
- the emission amount (generation amount) of particulate matter discharged from the engine is estimated from the engine speed, the fuel injection amount, etc., and is regenerated when the estimated amount reaches a preset threshold value. It is comprised so that a process may be performed (patent document 2, patent document 3).
- the filter contains substances other than particulate matter that are burned and removed by the regeneration process, that is, ash contained in engine oil or fuel that is not burned and removed by the regeneration process. accumulate.
- the amount of the ash deposited on the filter is estimated based on the number of times the regeneration process is performed, and the regeneration process is performed in consideration of the estimated amount of ash. (Patent Document 4).
- JP 2010-65577 A Japanese Patent Laid-Open No. 11-13455 JP 2004-132358 A JP-A-7-11935
- engine fuels and engine oils are of poor quality, for example, those containing a large amount of sulfur, additives, ash that is burned and not removed by regeneration treatment (bad fuel, bad oil). If such poor quality fuel or engine oil is used, the amount of particulate matter discharged increases, and the frequency of regeneration processing may increase, or the filter performance may deteriorate.
- the correspondence between the engine speed, the fuel injection amount, and the generation amount of particulate matter is created in advance as a map, and the particulate matter collected by the filter using the map It is the structure which estimates the amount of collection.
- the map is created using standard quality fuel and engine oil, for example, when poor quality fuel or engine oil is used, the estimated collection amount and the actual collection amount There is a risk that the error will increase. If the operation is continued with a large error, the regeneration process is performed in a state where the particulate matter is excessively deposited on the filter, the temperature of the filter becomes excessively high, and the durability of the filter may be reduced. Furthermore, there is a risk that the durability of the equipment constituting the fuel injection system of the engine may be reduced.
- Patent Document 4 the regeneration process is performed in consideration of the ash accumulated on the filter, but there is a possibility that the estimation accuracy of the ash cannot be sufficiently secured. In particular, it is not possible to deal with fluctuation factors when fuel of poor quality or engine oil is temporarily used, and there is a risk that the durability of the filter or engine may be reduced as in the prior art according to Patent Document 2. is there.
- the present invention has been made in view of the above-described problems of the prior art, and can prevent deterioration in the durability of filters and engines due to the use of poor quality fuel or engine oil. It aims to provide a construction machine that can improve the stability.
- a construction machine has a self-propelled vehicle body, an engine mounted on the vehicle body, and a filter that collects particulate matter in exhaust gas discharged from the engine, on the exhaust side of the engine.
- An exhaust gas purification device is provided, and a regenerator that regenerates the filter by burning particulate matter collected by the filter of the exhaust gas purification device.
- a feature of the configuration adopted by the present invention is that the regenerator is configured to collect at least the engine speed and the fuel injection amount of the particulate matter collected by the filter.
- a first collected amount estimating means for estimating the collected amount of particulate matter collected by the filter, at least the pressure on the inlet side (P1) and the pressure on the outlet side (P2) ),
- a reproduction determination means for determining whether or not to perform the reproduction processing depending on whether or not
- a malfunction determination means for determining that the regeneration device is malfunctioning when the second estimated capture quantity (Q2) is larger than the first estimated capture quantity (Q1); There is.
- the malfunction determination means It can be determined that there is a malfunction (or there is a risk of malfunction). Therefore, necessary maintenance and repair such as replacement of engine oil and fuel can be performed, and durability of the filter and the engine can be improved. Thereby, the reliability and stability of the construction machine can be improved.
- the collection amount threshold (Qs) is a determination value for determining whether or not the particulate matter collected by the filter has reached a collection amount necessary for the regeneration process of the filter. It is in. According to this configuration, when the particulate matter is collected in the filter with reference to the collection amount threshold (Qs), the regeneration process can be performed by the regeneration device.
- the regeneration device performs the regeneration fuel injection by the engine fuel injection device when performing the regeneration processing of the filter, or the intake throttle valve provided on the intake side of the engine And the exhaust throttle valve provided on the exhaust side are driven in the direction of narrowing the flow path of at least one throttle valve to burn the particulate matter collected by the filter.
- the reproduction process can be performed by a method suitable for the model.
- the difference ( ⁇ Q Q2 ⁇ Q1) between the first estimated collection amount (Q1) and the second estimated collection amount (Q2), and the difference ( ⁇ Q) is a predetermined value ( ⁇ Qs )
- T continuation time
- the malfunction determination means sets in advance the interval ( ⁇ K) of the regeneration process performed when the second estimated collection amount (Q2) becomes equal to or greater than the collection amount threshold (Qs).
- the number of times (C) the reproduction process is performed within an interval within the predetermined time ( ⁇ Ks) reaches the predetermined number of times (Cs) set in advance, the reproduction apparatus malfunctions. It is in the configuration that determines that there is.
- the malfunction can be determined based on the interval ( ⁇ K) of the reproduction process and the number of times (C). For this reason, it is possible to stably determine that there is a malfunction (or that there is a risk of malfunction) in the filter or engine associated with the use of poor quality fuel or engine oil.
- the reproducing apparatus is determined to have a malfunction.
- the reproducing apparatus is configured to output a signal for notifying an operator on the vehicle body that there is a malfunction when the malfunction determination means determines that there is a malfunction.
- the malfunction determination means when it is determined by the malfunction determination means that there is a malfunction (or there is a risk of malfunction), the operator is notified of this, and the construction machine is repaired and repaired according to the notification. be able to. Thereby, it can prevent beforehand that durability of a filter or an engine falls or an excessive malfunction arises.
- the reproducing apparatus is configured to limit the output of the engine to be smaller than a rated output when it is determined by the malfunction determination means that there is malfunction.
- the engine output can be limited to be smaller than the rated output. For this reason, even when poor quality fuel or engine oil is used, it is possible to suppress a large load from being applied to the engine. Thereby, it is possible to prevent a decrease in durability of the engine and the filter and an excessive malfunction.
- FIG. 2 is a partially cutaway plan view showing the hydraulic excavator in an enlarged manner with the cab and part of the outer cover removed from the upper swing body in FIG. 1.
- It is a circuit block diagram which shows an engine, an exhaust-gas purification apparatus, a regeneration apparatus, etc. It is a flowchart which shows the regeneration process of the particulate matter removal filter by a reproducing
- DELTA time change of difference
- FIG. 6 is a circuit configuration diagram similar to FIG. 3 showing an engine, an exhaust gas purification device, a regenerator, and the like according to a third embodiment of the present invention. It is a flowchart which shows the malfunction determination process by the 4th Embodiment of this invention. It is a characteristic diagram which shows an example of the time change of the 1st estimated collection amount and the 2nd estimated collection amount.
- FIG. 1 to 6 show a construction machine according to a first embodiment of the present invention.
- the hydraulic excavator 1 is a small hydraulic excavator used for earth and sand excavation work.
- the hydraulic excavator 1 is a self-propelled crawler-type lower traveling body 2 and is mounted on the lower traveling body 2 so as to be able to swivel via a turning device 3.
- the main body 4 and a work device 5 provided so as to be able to move up and down on the front side of the upper swing body 4 are roughly configured.
- the working device 5 is configured as a swing post type working device, for example, a swing post 5A, a boom 5B, an arm 5C, a bucket 5D as a working tool, and a swing cylinder 5E that swings the working device 5 left and right.
- a boom cylinder 5F, an arm cylinder 5G, and a bucket cylinder 5H are provided.
- the upper swing body 4 includes a swing frame 6, an exterior cover 7, a cab 8, a counterweight 9, and the like which will be described later.
- the turning frame 6 forms the structure of the upper turning body 4, and the turning frame 6 is attached on the lower traveling body 2 via the turning device 3.
- the revolving frame 6 is provided with a counterweight 9 and an engine 10 which will be described later on the rear side, and a cab 8 which will be described later on the left front side.
- the revolving frame 6 is provided with an outer cover 7 positioned between the cab 8 and the counterweight 9.
- the outer cover 7, together with the revolving frame 6, the cab 8 and the counterweight 9, includes an engine 10 and a hydraulic pump 15.
- a space for accommodating the heat exchanger 17, the exhaust gas purifying device 18 and the like is defined.
- the cab 8 is mounted on the left front side of the turning frame 6, and the cab 8 defines an operator cab in which the operator is boarded. Inside the cab 8, a driver's seat on which an operator sits, various operation levers, an alarm device 27 (see FIG. 3) described later, and the like are arranged.
- the counterweight 9 balances the weight with the work device 5, and the counterweight 9 is attached to the rear end of the turning frame 6 so as to be positioned on the rear side of the engine 10 described later. As shown in FIG. 2, the rear surface side of the counterweight 9 is formed in an arc shape, and the counterweight 9 is configured to fit within the vehicle body width of the lower traveling body 2.
- Numeral 10 is an engine arranged horizontally on the rear side of the revolving frame 6, and the engine 10 is mounted on the small hydraulic excavator 1 as a prime mover, and is configured using, for example, a small diesel engine.
- the engine 10 is provided with an intake pipe 11 (see FIG. 3) for sucking outside air and an exhaust pipe 12 forming a part of an exhaust gas passage for discharging exhaust gas.
- the intake pipe 11 is for the outside air (air) to flow toward the engine 10, and an air cleaner 13 for cleaning the outside air is connected to the front end side of the intake pipe 11.
- An exhaust gas purification device 18 to be described later is connected to the exhaust pipe 12.
- the engine 10 is constituted by an electronically controlled engine, and the fuel supply amount is variably controlled by a fuel injection device 14 (see FIG. 3) such as an electronically controlled injection valve. That is, the fuel injection device 14 variably controls the injection amount (fuel injection amount) of fuel injected into a cylinder (not shown) of the engine 10 based on a control signal output from a controller 28 described later. .
- the fuel injection device 14 constitutes the regeneration device 22 together with a controller 28 and the like which will be described later.
- the fuel injection device 14 responds to a control signal from the controller 28, for example, a fuel injection for regeneration processing called post injection ( Perform additional injection after the combustion process).
- post injection Perform additional injection after the combustion process.
- the hydraulic pump 15 is attached to the left side of the engine 10, and the hydraulic pump 15 constitutes a hydraulic source together with a hydraulic oil tank (not shown).
- the hydraulic pump 15 is configured by, for example, a variable displacement swash plate type, a swash shaft type, or a radial piston type hydraulic pump.
- the hydraulic pump 15 is not necessarily limited to a variable displacement hydraulic pump, and may be configured using, for example, a fixed displacement hydraulic pump.
- a power transmission device 16 is attached to the left side of the engine 10, and the rotational output of the engine 10 is transmitted to the hydraulic pump 15 via the power transmission device 16.
- the hydraulic pump 15 discharges pressure oil (hydraulic oil) toward a control valve (not shown) by being driven by the engine 10.
- the heat exchanger 17 is provided on the revolving frame 6 on the right side of the engine 10, and the heat exchanger 17 includes, for example, a radiator, an oil cooler, and an intercooler. That is, the heat exchanger 17 cools the engine 10 and also cools the pressure oil (working oil) returned to the working oil tank.
- 18 indicates an exhaust gas purifying device provided on the exhaust side of the engine 10.
- the exhaust gas purification device 18 is disposed on the upper left side of the engine 10, for example, at a position above the power transmission device 16, and the exhaust pipe 12 of the engine 10 is connected to the upstream side thereof. ing.
- the exhaust gas purification device 18 constitutes an exhaust gas passage together with the exhaust pipe 12, and removes harmful substances contained in the exhaust gas while the exhaust gas flows from the upstream side to the downstream side.
- an exhaust gas purification device 18 attached to the exhaust pipe 12 includes an oxidation catalyst 20 (to be described later) that oxidizes and removes carbon monoxide (CO) and the like in the exhaust gas,
- the particulate matter removal filter 21 described later for collecting and removing the particulate matter (PM) is included.
- the exhaust gas purifying device 18 has a cylindrical casing 19 configured by detachably connecting a plurality of cylindrical bodies, for example, before and after.
- An oxidation catalyst 20 and a particulate matter removal filter 21 as a filter are detachably accommodated in the casing 19.
- the oxidation catalyst 20 is made of, for example, a ceramic cylindrical tube having an outer diameter dimension equivalent to the inner diameter dimension of the casing 19. A large number of through holes (not shown) are formed in the oxidation catalyst 20 in the axial direction, and the inner surface thereof is coated with a noble metal.
- the oxidation catalyst 20 oxidizes and removes carbon monoxide (CO), hydrocarbon (HC), etc. contained in the exhaust gas by circulating the exhaust gas through each through hole under a predetermined temperature condition. Then, nitrogen oxide (NO) is removed as nitrogen dioxide (NO2).
- the particulate matter removal filter 21 is disposed in the casing 19 on the downstream side of the oxidation catalyst 20.
- the particulate matter removal filter 21 collects particulate matter in the exhaust gas discharged from the engine 10 and purifies the exhaust gas by burning and removing the collected particulate matter.
- the particulate matter removal filter 21 is configured by a cellular cylindrical body in which a large number of small holes (not shown) are provided in the axial direction on a porous member made of, for example, a ceramic material. Thereby, the particulate matter removing filter 21 collects the particulate matter through a large number of small holes, and the collected particulate matter is burned and removed by a regeneration process of the regeneration device 22 described later. As a result, the particulate matter removal filter 21 is regenerated.
- regenerator 22 that performs the regenerating process of the filter 21 will be described.
- reference numeral 22 denotes a regenerator that regenerates the filter 21 by burning the particulate matter collected by the particulate matter removal filter 21 of the exhaust gas purification device 18.
- the regeneration device 22 includes the fuel injection device 14 described above, a rotation sensor 23 described later, pressure sensors 24 and 25, an exhaust temperature sensor 26, an alarm device 27, and a controller 28.
- the regeneration device 22 performs post injection by the fuel injection device 14 in accordance with a command signal (control signal) from the controller 28. Thereby, as will be described later, the temperature of the exhaust gas in the exhaust pipe 12 is raised, and the particulate matter deposited on the particulate matter removal filter 21 is burned and removed.
- the playback device 22 has an automatic playback function for automatically performing playback processing based on the determination of the controller 28, and a malfunction notification function for notifying the operator of malfunction when there is a malfunction in the playback device 22 or the engine 10 by the controller 28.
- the malfunction notification function may cause malfunction or malfunction in the regeneration device 22 or the engine 10 due to use of poor quality fuel or engine oil (hereinafter referred to as malfunction).
- the controller 28 also has a function of limiting the rotational speed of the engine 10.
- the rotation sensor 23 detects the rotation speed (rotation speed) of the engine 10, and the rotation sensor 23 detects the rotation speed N of the engine 10 and outputs a detection signal to the controller 28 described later.
- the controller 28 is based on the engine speed N detected by the rotation sensor 23, the fuel injection amount F injected by the fuel injection device 14, and the exhaust gas temperature (exhaust temperature) detected by the exhaust temperature sensor 26 described later. Whether or not the particulate matter trapped in the particulate matter removal filter 21 is estimated and the regeneration process is performed based on the first estimated trapped amount Q1 that is the estimated trapped amount. Judgment is made.
- the fuel injection amount F can be obtained from, for example, an intake air amount detected from an air flow meter (air flow meter) (not shown) provided on the intake side of the engine 10 and the engine speed N. It can also be calculated from a control signal (fuel injection command) output from 28 to the fuel injection device 14.
- the pressure sensors 24 and 25 are provided in the casing 19 of the exhaust gas purification device 18. As shown in FIG. 3, the pressure sensors 24 and 25 are arranged on the inlet side (upstream side) and the outlet side (downstream side) of the particulate matter removal filter 21 so as to be separated from each other, and the respective detection signals are described later. Output to the controller 28.
- the controller 28 calculates a differential pressure ⁇ P from the inlet-side pressure P 1 detected by the pressure sensor 24 and the outlet-side pressure P 2 detected by the pressure sensor 25, and converts the differential pressure ⁇ P, the exhaust temperature, and the exhaust gas flow rate. Whether or not the particulate matter trapped in the particulate matter removal filter 21 is estimated and the regeneration process is performed based on the second estimated trapped amount Q2 that is the estimated trapped amount. Judgment is made.
- the exhaust temperature sensor 26 detects exhaust gas temperature (exhaust temperature). As shown in FIG. 3, the exhaust temperature sensor 26 is attached to the casing 19 of the exhaust gas purification device 18 and detects the temperature of exhaust gas discharged from the exhaust pipe 12 side, for example. The exhaust temperature detected by the exhaust temperature sensor 26 is output as a detection signal to the controller 28 described later. The exhaust temperature is used for estimating the amount of particulate matter collected by the particulate matter removal filter 21.
- the alarm device 27 is provided in the cab 8 in the vicinity of the driver's seat.
- the notification device 27 is connected to the controller 28 and notifies the operator that there is a malfunction in the playback device 22 or the engine 10 based on a command (notification signal) from the controller 28.
- the notification device 27 can be configured by a buzzer for generating a notification sound, a speaker for generating a sound, a light or a monitor for displaying notification contents, and the like.
- the alarm device 27 emits a notification sound and a notification display based on a command (notification signal) from the controller 28 to the operator. To that effect.
- the controller 28 comprises a microcomputer or the like, and the controller 28 is connected to the fuel injection device 14, the rotation sensor 23, the pressure sensors 24 and 25, the exhaust temperature sensor 26, and the like on the input side.
- the output side of the controller 28 is connected to the fuel injection device 14, the alarm 27, and the like.
- the controller 28 has a storage unit 28A composed of a ROM, a RAM, and the like.
- a processing program for reproduction processing and malfunction determination shown in FIGS.
- a first map, a second map, a calculation formula, a preset collection amount threshold value Qs, a predetermined value ⁇ Qs, a predetermined time Ts, and the like for estimating the amount of collected substances are stored.
- the first map for estimating the collection amount is for estimating the collection amount based on at least the rotational speed N of the engine 10 and the fuel injection amount F.
- the first map is obtained, for example, by previously obtaining a correspondence relationship between the engine speed N, the fuel injection amount F, and the particulate matter emission amount through experiments, calculations, simulations, and the like, and creating the correspondence relationship as a map. It is a thing.
- the calculation formula for estimating the collection amount is Q1 as the estimated collection amount, Hm as the discharge amount of the particulate matter obtained from the first map, and is removed from the particulate matter removal filter 21 by the regeneration process.
- the amount of particulate matter (regeneration amount) is J, it can be expressed as the following formula 1.
- the amount of particulate matter removed by the regeneration process is, for example, the exhaust gas flow rate obtained from the engine speed N and the fuel injection amount F, the exhaust temperature, and the engine speed. It can be calculated from the relationship with the NO 2 conversion rate obtained by adding the exhaust gas temperature to the nitrogen oxide (NOx) emission amount obtained from N and the fuel injection amount F.
- the second map for estimating the collection amount is for estimating the collection amount based on at least the differential pressure ⁇ P of the particulate matter removal filter 21.
- the second map is obtained, for example, by previously obtaining a correspondence relationship between the differential pressure ⁇ P, the exhaust gas flow rate, and the estimated collection amount Q2 through experiments, calculations, simulations, and the like, and creating the correspondence relationship as a map. It is.
- the differential pressure ⁇ P of the particulate matter removal filter 21 is calculated by the following equation 2 when the pressure on the inlet side detected by the pressure sensor 24 is P1 and the pressure P2 on the outlet side detected by the pressure sensor 25 is used. (See JP 2004-132358 A).
- the collected amount threshold value Qs is a reference value for determining whether or not to perform the regeneration process. That is, the collection amount threshold value Qs is the first estimated collection amount Q1 estimated by the first map and the calculation formula and / or the second estimated collection amount estimated by the second map. This is for determining that the regeneration process is necessary when the amount Q2 becomes equal to or greater than the collection amount threshold value Qs.
- the collection amount threshold value Qs is a determination value for determining whether or not the particulate matter collected by the particulate matter removal filter 21 has reached the collection amount necessary for the regeneration process of the filter 21.
- the collection amount threshold value Qs is determined in advance by experiments, calculations, and simulations so that the regeneration process can be performed in an appropriate state, for example, in a state where sufficient particulate matter is collected in the particulate matter removal filter 21.
- the value is set based on the above. Thereby, when the particulate matter is sufficiently collected by the particulate matter removal filter 21, the regeneration process can be stably performed by the regeneration device 22.
- the predetermined value ⁇ Qs and the predetermined time Ts are experimentally determined in advance so that the possibility of malfunction or malfunction of the regeneration device 22 or the engine 10 due to use of poor quality fuel or engine oil can be appropriately determined.
- the value is set based on calculation, simulation, or the like.
- the controller 28 determines that there is a malfunction in the automatic reproduction control (first function) for automatically performing the reproduction process and the reproduction apparatus 22 or the engine 10 in accordance with the processing program shown in FIGS.
- the malfunction determination control (second function) for notifying that effect is performed.
- the controller 28 estimates at least the amount of particulate matter collected by the particulate matter removal filter 21 based on at least the fuel injection amount F and the engine speed N, and at least the particulate matter removal filter. It is also estimated based on the differential pressure ⁇ P of 21.
- the controller 28 determines the two estimated collection amounts, that is, the first estimated collection amount Q1 estimated based on at least the fuel injection amount F and the engine speed N, and at least the particulate matter removal.
- the estimated collection amount of at least one of the second estimated collection amount Q2 estimated based on the differential pressure ⁇ P of the filter 21 is equal to or greater than the collection amount threshold value Qs, and the regeneration process needs to be performed. Determine whether.
- the controller 28 outputs a control signal to the effect that the post-injection is performed to the fuel injection device 14 and controls automatic regeneration.
- the controller 28 determines whether or not the regenerator 22 or the engine 10 is malfunctioning based on the magnitude relationship between the first estimated collection amount Q1 and the second estimated collection amount Q2. Specifically, the second estimated collection amount Q2 becomes larger than the first estimated collection amount Q1, and the difference (Q2 ⁇ Q1) is equal to or greater than a predetermined value ⁇ Qs [g / L], and When the duration time T of the state becomes equal to or longer than a predetermined time Ts [Hr] set in advance, it is determined that the playback device 22 or the engine 10 is malfunctioning.
- the controller 28 When it is determined that there is a malfunction, the controller 28 outputs a signal (notification signal) for notifying the operator, thereby generating a notification sound and a notification display from the notification device 27, Take control.
- the controller 28 outputs a control signal for limiting the fuel injection amount F and the engine speed N to, for example, the fuel injection device 14 of the engine 10 in order to limit the output of the engine 10 to be smaller than the rated output.
- the exhaust port 29 is provided on the downstream side of the exhaust gas purification device 18, and the exhaust port 29 is located on the downstream side of the particulate matter removal filter 21 and connected to the outlet side of the casing 19.
- the exhaust port 29 is configured to include a chimney and a silencer that release exhaust gas after being purified, for example, into the atmosphere.
- the hydraulic excavator 1 according to the first embodiment has the above-described configuration, and the operation thereof will be described next.
- the operator of the hydraulic excavator 1 gets on the cab 8 of the upper swing body 4, starts the engine 10, and drives the hydraulic pump 15. Thereby, the pressure oil from the hydraulic pump 15 is supplied to various actuators via the control valve.
- the lower traveling body 2 can be moved forward or backward.
- the work device 5 can be moved up and down to perform excavation work of earth and sand.
- the small excavator 1 has a small turning radius by the upper swing body 4, for example, even in a narrow work site such as an urban area, a side ditching operation or the like can be performed while the upper swing body 4 is driven to rotate.
- particulate matter that is a harmful substance is discharged from the exhaust pipe 12.
- the exhaust gas purification device 18 can oxidize and remove hydrocarbon (HC), nitrogen oxide (NO), and carbon monoxide (CO) in the exhaust gas by the oxidation catalyst 20.
- the particulate matter removal filter 21 collects particulate matter contained in the exhaust gas.
- the purified exhaust gas can be discharged to the outside through the downstream discharge port 29. Further, the collected particulate matter is burned and removed (regeneration process) by the regenerator 22.
- the fuel or engine oil of the engine 10 is poor in quality, for example, one containing a large amount of sulfur, additives, ash not burned / removed by the regeneration process (bad fuel, bad oil).
- the discharge amount of particulate matter increases, the frequency of regeneration processing increases, the performance of the engine 10 or the regeneration device 22 decreases, and the durability decreases.
- the controller 28 of the reproduction device 22 controls the reproduction process, and in addition to controlling the reproduction process, the first estimated collection amount Q1 and the second estimated collection amount Q2 used for determining whether or not to perform the reproduction process. From the estimated collection amount Q2, the malfunction of the regenerator 22 and the engine 10 due to the use of poor quality fuel or engine oil is determined. Specifically, the controller 28 executes the processing shown in FIGS. 4 and 5 to perform the reproduction processing and the malfunction determination processing.
- the engine speed N is read from the rotation sensor 23 in Step 1.
- the fuel injection amount F injected from the fuel injection device 14 is read.
- the fuel injection amount F can be obtained from, for example, an intake air amount detected from an air flow meter (air flow meter) (not shown) provided on the intake side of the engine 10 and the engine speed N. It can also be calculated from a control signal (fuel injection command) output from 28 to the fuel injection device 14.
- step 3 based on the engine speed N and the fuel injection amount F, the amount of particulate matter collected by the particulate matter removal filter 21, that is, the first estimated amount of collection Q1 is estimated ( calculate.
- the first estimated collection amount Q1 can be estimated using the first map and the calculation formula stored in the storage unit 28A of the controller 28.
- the total amount of emissions from the start of operation to the present time is obtained by calculating the discharge amount per unit time from the engine speed N and the fuel injection amount F using the above-mentioned first map and integrating the discharge amount.
- the amount Hm is determined.
- the first estimated collection amount Q1 at the present time is obtained by subtracting the amount (regeneration amount) J of the particulate matter removed in the regeneration process up to the present time from the total emission amount Hm. Can be estimated.
- pressures P1 and P2 are read from the pressure sensors 24 and 25, respectively. That is, the upstream pressure P1 and the downstream pressure P2 of the particulate matter removal filter 21 are read.
- the differential pressure ⁇ P between the upstream pressure P1 and the downstream pressure P2 of the particulate matter removal filter 21 is calculated by the above-described equation (2).
- the trapped amount of particulate matter collected by the particulate matter removal filter 21, that is, the second estimated trapped amount Q2 is estimated (calculated) based on the differential pressure ⁇ P.
- the second estimated collection amount Q2 can be estimated using the above-described second map stored in the storage unit 28A of the controller 28. That is, the current second estimated collection amount Q2 can be estimated based on the second map in which the differential pressure ⁇ P, the exhaust gas flow rate, and the estimated collection amount Q2 are associated with each other.
- step 7 whether or not the regeneration process is performed depends on whether or not the first estimated collection amount Q1 and / or the second estimated collection amount Q2 is equal to or greater than a preset collection amount threshold value Qs. Make a decision. If it is determined in step 7 that “YES”, that is, at least one of the estimated collection amounts Q1 and Q2 is equal to or greater than the collection amount threshold value Qs, the particulate matter removal filter 21 has particulate matter. Since the trapped amount is sufficient, the process proceeds to step 8 and automatic regeneration is started. That is, in step 8, a control signal indicating that post-injection is performed from the controller 28 to the fuel injector 14 is output. Thereby, the temperature of the exhaust gas from the engine 10 is raised, and the particulate matter collected (deposited) on the particulate matter removal filter 21 is burned and removed. Next, the process proceeds to a malfunction determination process in step 9 described later.
- step 7 determines whether the particulate matter removal filter 21 has sufficient particulate matter. Since it is not collected, the process proceeds to return without going through step 8 and step 9, and the processes in and after step 1 are repeated.
- step 9 of FIG. 4 the malfunction determination process shown in step 9 of FIG. 4 will be specifically described with reference to FIG.
- step 9 whether or not the regenerator 22 or the engine 10 is malfunctioning is determined using the first estimated collection amount Q 1 estimated in step 3 and the second estimated collection amount Q 2 estimated in step 6.
- the malfunction determination process is performed to determine whether or not the playback device 22 or the engine 10 is malfunctioning. When it is determined that the malfunction has occurred, the operator is notified of the malfunction and the output of the engine 10 is rated output. The processing is limited to a smaller value.
- step 11 of the malfunction determination process it is determined whether or not the second estimated collection amount Q2 estimated in step 6 is larger than the first estimated collection amount Q1 estimated in step 3 (Q1 ⁇ Q2). To do. If it is determined in step 11 that “NO”, that is, the second estimated trapped amount Q2 is equal to or less than the first estimated trapped amount Q1, poor quality fuel or engine oil is used. Since there is no deviation between the first estimated collection amount Q1 and the second estimated collection amount Q2 due to the above, the routine proceeds to step 12, and it is determined that there is no malfunction. In this case, the process returns to the start of FIG. 4 and the processes after step 1 are repeated.
- step 13 If it is determined in step 13 that “NO”, that is, the difference ⁇ Q between the second estimated collection amount Q2 and the first estimated collection amount Q1 is smaller than a predetermined value ⁇ Qs, for example, a rotation sensor 23 or the pressure sensors 24 and 25, it is considered that there is a high possibility of a slight shift in the collected amount due to the accuracy error, etc. In this case, the process returns to the start of FIG. 4 and the processes after step 1 are repeated.
- a predetermined value ⁇ Qs for example, a rotation sensor 23 or the pressure sensors 24 and 25
- step 14 Proceed to In step 14, the duration T in which the difference ⁇ Q between the second estimated collection amount Q2 and the first estimated collection amount Q1 is equal to or greater than a predetermined value ⁇ Qs is equal to or greater than a preset predetermined time Ts ( It is determined whether or not T ⁇ Ts). That is, as shown in FIG. 6, is the state where the difference ⁇ Q between the second estimated collection amount Q2 and the first estimated collection amount Q1 is equal to or greater than a predetermined value ⁇ Qs continues for a preset predetermined time Ts? Determine whether or not.
- step 14 that is, if it is determined that the duration T is shorter than the predetermined time Ts, the amount of trapping caused by malfunction of the rotation sensor 23 and the pressure sensors 24 and 25, for example, is transient. Since it is considered that there is a high possibility of deviation, the process proceeds to step 12 and it is determined that there is no malfunction. Also in this case, the process returns to the start of FIG. 4 and the processes after step 1 are repeated.
- step 14 determines that there is a malfunction.
- the controller 28 outputs a notification sound and a notification signal indicating that a notification display is issued to the notification device 27 to notify the operator that there is a malfunction.
- the output of the engine 10 is limited to be smaller than the rated output. That is, the controller 28 outputs a control signal for limiting the fuel injection amount F and the engine speed N to the fuel injection device 14 of the engine 10 as compared to when there is no malfunction. Thereafter, the process returns to the start of FIG. 4 and the processes in and after step 1 are repeated.
- the first embodiment it is possible to prevent the durability of the particulate matter removal filter 21 and the engine 10 from being lowered by using poor quality fuel or engine oil. . Thereby, the reliability and stability of the hydraulic excavator 1 can be improved.
- Step 13 and Step 14 Whether or not there is a malfunction can be determined by the processing of Step 13 and Step 14. If it is determined that there is a malfunction, necessary maintenance and repair such as replacement of engine oil and fuel can be performed, and the durability of the particulate matter removal filter 21 and the engine 10 is prevented from being lowered. be able to. Thereby, the reliability and stability of the hydraulic excavator 1 can be improved.
- step 15 if it is determined in step 15 that there is a malfunction, the operator is notified in step 16 that there is a malfunction. For this reason, according to the notification, an operator, a maintenance person, etc. can perform maintenance and repair of the excavator 1. Thereby, it can prevent beforehand that durability of the particulate matter removal filter 21 and the engine 10 falls, or an excessive malfunction arises.
- step 17 following step 16 the output of the engine 10 is limited to be smaller than the rated output. For this reason, it is possible to suppress a large load from being applied to the engine 10 with poor quality fuel or engine oil, and to prevent the engine 10 and the particulate matter removing filter 21 from being deteriorated in durability and excessively malfunctioning. Can do.
- FIG. 7 and FIG. 8 show a second embodiment of the present invention.
- a feature of the second embodiment is that a malfunction determination is made based on the reproduction processing interval ⁇ K and the number of times C thereof.
- the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.
- the malfunction determination process shown in FIG. 7 is used in the second embodiment instead of the malfunction determination process in FIG. 5 of the first embodiment.
- the malfunction determination process shown in FIG. 7 is stored in the storage unit 28A of the controller 28 as a process program for reproduction processing and malfunction determination together with the process shown in FIG.
- a predetermined time ⁇ Ks and a predetermined number of times Cs are stored in place of the predetermined value ⁇ Qs and the predetermined time Ts stored in the first embodiment.
- the predetermined time ⁇ Ks and the predetermined number of times Cs are thresholds for determining whether or not the playback device 22 or the engine 10 is malfunctioning. That is, the predetermined time ⁇ Ks and the predetermined number of times Cs are such that the interval ⁇ K of the regeneration process performed when the second estimated collection amount Q2 is equal to or greater than the collection amount threshold value Qs is within the predetermined time ⁇ Ks [Hr], and In this state, when the number of times C of reproduction processing has reached the predetermined number of times Cs [times], the determination value is determined to determine that the reproduction device 22 is malfunctioning.
- the predetermined time ⁇ Ks and the predetermined number of times Cs are experimentally and calculated in advance so that the possibility of malfunction or malfunction of the regeneration device 22 or the engine 10 due to use of poor quality fuel or engine oil can be appropriately determined.
- the value is set based on simulation or the like.
- the malfunction determination process of the second embodiment also uses the first estimated collection amount Q1 estimated in step 3 and the second estimated collection amount Q2 estimated in step 6 to use the regeneration device 22 and the engine 10. It is determined whether or not is malfunctioning. When it is determined that there is a malfunction, the operator is notified of this, and a process for limiting the output of the engine 10 as compared with when there is no malfunction is performed.
- step 21 it is determined whether or not the second estimated collection amount Q2 is larger than the first estimated collection amount Q1 (Q1 ⁇ Q2). To do. If it is determined in step 21 that “YES”, that is, the second estimated collection amount Q2 is larger than the first estimated collection amount Q1, the process proceeds to step 23, where the second estimated collection amount is determined. It is determined whether or not the regeneration process interval ⁇ K performed when Q2 becomes equal to or greater than the collection amount threshold value Qs is within a predetermined time ⁇ Ks ( ⁇ K ⁇ ⁇ Ks). That is, as shown in FIG.
- step 7 it is determined whether or not the reproduction processing interval ⁇ K is within a predetermined time ⁇ Ks.
- step 23 if “YES”, that is, if it is determined that the interval ⁇ K of the reproduction process is within the predetermined time ⁇ Ks, the process proceeds to step 24, and the reproduction process is performed at the interval ⁇ K within the predetermined time ⁇ Ks. It is determined whether or not the number of times C has reached a preset number of times Cs (C ⁇ Cs). If it is determined in step 24 that “YES”, that is, the regeneration process has been performed a predetermined number of times Cs at an interval ⁇ K within a predetermined time ⁇ Ks, the regenerator 22 due to the use of poor quality fuel or engine oil or the like. Since the engine 10 may be malfunctioning, the process proceeds to step 25 where it is determined that there is malfunction.
- steps 23 and 24 that is, the processes of steps 21, 22, 25, 26, and 27 are the processes of steps 11, 12, 15, 16, and 17 shown in FIG. 5 of the first embodiment. Since these are the same as each other, further explanation is omitted.
- the malfunction determination is performed based on the reproduction process interval ⁇ K and the number C thereof by the malfunction determination process shown in FIG. 7 as described above. There is no particular difference from that according to the first embodiment.
- step 23 and step 24 a malfunction is determined. For this reason, the malfunction determination resulting from the use of poor quality fuel or engine oil can be stably performed.
- FIG. 9 shows a third embodiment of the present invention.
- a feature of the third embodiment is that the regeneration process is not post-injection, but the flow path of at least one of the throttle valves provided on the intake side and the exhaust throttle valve provided on the exhaust side of the engine. In this configuration, driving is performed in the direction of narrowing down.
- the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.
- reference numeral 31 denotes a regenerator that regenerates the filter 21 by burning the particulate matter collected by the particulate matter removal filter 21.
- the regeneration device 31 includes a fuel injection device 14, an intake throttle valve 32, an exhaust throttle valve 33, a rotation sensor 23, pressure sensors 24 and 25, an exhaust temperature sensor 26, a notification device 27, and a controller 28.
- the regeneration device 31 performs the regeneration process, the regeneration device 31 is driven in a direction in which the flow path of at least one of the intake throttle valve 32 and the exhaust throttle valve 33 is throttled, so that the particulate matter deposited on the filter 21 Burn and remove.
- the intake throttle valve 32 is provided on the intake pipe 11 side of the engine 10, and the intake throttle valve 32 constitutes a regeneration device 31 that performs a regeneration process of the particulate matter removal filter 21.
- the intake throttle valve 32 is held in a normally opened state (for example, an opening corresponding to the fuel injection amount F or a fully opened state) by a control signal from the controller 28.
- the intake throttle valve 32 is driven in a direction to throttle the flow path by a control signal from the controller 28.
- the intake throttle valve 32 throttles the intake air amount so that the air-fuel ratio of air and fuel tends to be rich.
- the temperature of the exhaust gas discharged to the exhaust pipe 12 rises by burning the fuel whose air-fuel ratio tends to be rich, and the particulate matter collected by the filter 21 Can be burned and removed.
- the exhaust throttle valve 33 is provided on the exhaust pipe 12 side of the engine 10, and the exhaust throttle valve 33 also constitutes a regeneration device 31 that performs the regeneration process of the particulate matter removal filter 21.
- the exhaust throttle valve 33 is maintained in a fully open state in a normal state by a control signal from the controller 28.
- the exhaust throttle valve 33 is driven in the direction of narrowing the flow path by the control signal from the controller 28, and the opening degree is controlled to be small.
- the exhaust throttle valve 33 throttles the flow rate of the exhaust gas flowing in the exhaust pipe 12 to apply a back pressure to the engine 10 to increase the load on the engine 10.
- the controller 28 increases the fuel injection amount F by the fuel injection device 14 of the engine 10 corresponding to the load. As a result, the temperature of the exhaust gas rises, and the particulate matter collected by the filter 21 can be burned and removed.
- regeneration processing is performed by driving at least one of the intake throttle valve 32 and the exhaust throttle valve 33 as described above in the direction of narrowing the flow path.
- the operation there is no particular difference from that according to the first embodiment described above.
- the regeneration process is performed by driving at least one of the intake throttle valve 32 and the exhaust throttle valve 33 in the direction of narrowing the flow path. Compared with the case where it is performed by post injection, it can be performed at a low temperature. Thereby, durability of the filter 21 can be improved.
- FIG. 10 and FIG. 11 show a fourth embodiment of the present invention.
- the malfunction determination is based on the interval ( ⁇ L) of the reproduction processing performed in a state equal to or greater than the value ( ⁇ Qs) and the number (N) of the reproduction processing.
- the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.
- the malfunction determination process shown in FIG. 10 is used in the fourth embodiment instead of the malfunction determination process in FIG. 5 of the first embodiment. For this reason, the malfunction determination process shown in FIG. 10 is stored in the storage unit 28A of the controller 28 as a process program for reproduction processing and malfunction determination together with the process shown in FIG. In the storage unit 28A of the controller 28, in addition to the predetermined value ⁇ Qs stored in the first embodiment, a predetermined time ⁇ Ls and a predetermined number Ns are stored.
- the predetermined number Ns is a determination value used for determining whether or not the number N of reproduction processes performed at an interval ⁇ L within a predetermined time ⁇ Ls [Hr] has reached the predetermined number Ns [times].
- a predetermined value ⁇ Qs When the reproduction process interval ⁇ L performed when the collected amount Q2 is equal to or greater than Qs is within the predetermined time ⁇ Ls, and the number N of reproduction processes performed at an interval within the predetermined time ⁇ Ls has reached the predetermined number Ns. Then, it is determined that the playback device 22 is malfunctioning.
- the predetermined value ⁇ Qs, the predetermined time ⁇ Ls, and the predetermined number of times Ns can appropriately determine the possibility of malfunction or malfunction of the regenerator 22 or the engine 10 caused by using poor quality fuel or engine oil. The value is set in advance based on experiments, calculations, simulations, and the like.
- the malfunction determination process of the fourth embodiment also uses the first estimated collection amount Q1 estimated in step 3 and the second estimated collection amount Q2 estimated in step 6 to use the regeneration device 22 and the engine 10. It is determined whether or not is malfunctioning. When it is determined that there is a malfunction, the operator is notified of this, and a process for limiting the output of the engine 10 as compared with when there is no malfunction is performed.
- step 34 the interval ⁇ L of the regeneration process performed in a state where the difference ⁇ Q between the second estimated collection amount Q2 and the first estimated collection amount Q1 is equal to or greater than a predetermined value ⁇ Qs is within a preset predetermined time ⁇ Ls. It is determined whether ( ⁇ L ⁇ ⁇ Ls). That is, as shown in FIG.
- step 34 it is determined whether or not the reproduction processing interval ⁇ L is within a predetermined time ⁇ Ls.
- step 34 if “YES”, that is, if it is determined that the reproduction processing interval ⁇ L is within the predetermined time ⁇ Ls, the process proceeds to step 35, where the reproduction processing is performed at the interval ⁇ L within the predetermined time ⁇ Ls. It is determined whether or not the number of times N has reached a preset number of times Ns (N ⁇ Ns). If it is determined in step 35 that “YES”, that is, the regeneration process has been performed a predetermined number of times Ns at an interval ⁇ L within a predetermined time ⁇ Ls, the regenerator 22 due to the use of poor quality fuel or engine oil or the like. Since the engine 10 may be malfunctioning, the process proceeds to step 36 and it is determined that there is malfunction.
- step 34 and step 35 that is, the processes of steps 31, 32, 33, 36, 37, and 38, are steps 11, 12, 13, 15, and 16 shown in FIG. 5 of the first embodiment. , 17 are the same as those in FIG.
- the fourth embodiment in the state in which the difference ⁇ Q between the second estimated collection amount Q2 and the first estimated collection amount Q1 is greater than or equal to a predetermined value ⁇ Qs by the malfunction determination process shown in FIG. 10 as described above.
- a malfunction determination is performed based on the interval ⁇ L and the number N of the reproduction processes to be performed, and the basic action is not particularly different from that according to the first embodiment described above.
- the malfunction is determined by the processing of steps 33, 34, and 35. For this reason, the malfunction determination resulting from the use of poor quality fuel or engine oil can be performed more stably.
- step 3 shown in FIG. 4 is a specific example of the first collection amount estimation means that is a constituent of the present invention
- the process of step 6 is the second collection.
- This is a specific example of the quantity estimation means
- the processing of step 7 shows a specific example of the reproduction determination means.
- the processing of steps 11 to 15 shown in FIG. 5 the processing of steps 21 to 25 shown in FIG. 7, and the processing of steps 31 to 36 shown in FIG. Show.
- the exhaust gas purification device 18 is configured by the oxidation catalyst 20 and the particulate matter removal filter 21 has been described as an example.
- the present invention is not limited to this.
- a urea injection valve, a selective reduction catalyst device, and the like may be used in combination.
- the construction machine provided with the exhaust gas purifying apparatus according to the present invention is not limited to this, and may be applied to, for example, a medium-sized or larger hydraulic excavator.
- the present invention can be widely applied to construction machines such as a hydraulic excavator, a wheel loader, a forklift, and a hydraulic crane having a wheel type lower traveling body.
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Abstract
Description
2 下部走行体(車体)
4 上部旋回体(車体)
10 エンジン
14 燃料噴射装置
18 排気ガス浄化装置
21 粒子状物質除去フィルタ(フィルタ)
22,31 再生装置
24,25 圧力センサ
27 報知器
28 コントローラ
Claims (8)
- 自走可能な車体(2,4)と、該車体(2,4)に搭載されたエンジン(10)と、該エンジン(10)から排出される排気ガス中の粒子状物質を捕集するフィルタ(21)を有し前記エンジン(10)の排気側に設けられる排気ガス浄化装置(18)と、該排気ガス浄化装置(18)のフィルタ(21)に捕集される粒子状物質を燃焼させることにより該フィルタ(21)の再生処理を行う再生装置(22,31)とを備えてなる建設機械において、
前記再生装置(22,31)は、
前記フィルタ(21)に捕集される粒子状物質の捕集量を、少なくとも前記エンジン(10)の回転数(N)と燃料噴射量(F)とに基づいて推定する第1の捕集量推定手段と、
前記フィルタ(21)に捕集される粒子状物質の捕集量を、少なくとも前記フィルタ(21)の入口側の圧力(P1)と出口側の圧力(P2)の差である差圧(ΔP=P1-P2)に基づいて推定する第2の捕集量推定手段と、
前記第1の捕集量推定手段により推定される第1の推定捕集量(Q1)と前記第2の捕集量推定手段により推定される第2の推定捕集量(Q2)とのうちの少なくとも何れか一方の推定捕集量が、予め設定した捕集量閾値(Qs)以上であるか否かにより前記再生処理を行うか否かの判定を行う再生判定手段と、
前記第1の推定捕集量(Q1)よりも前記第2の推定捕集量(Q2)が大きくなった場合に、前記再生装置(22,31)に不調があると判定する不調判定手段とを備える構成としたことを特徴とする建設機械。 - 前記捕集量閾値(Qs)は、前記フィルタ(21)に捕集された粒子状物質が該フィルタ(21)の再生処理に必要な捕集量になったか否かを判定する判定値である請求項1に記載の建設機械。
- 前記再生装置(22,31)は、前記フィルタ(21)の再生処理を行うときに、前記エンジン(10)の燃料噴射装置(14)で再生用の燃料噴射を行うことにより、または、前記エンジン(10)の吸気側に設けた吸気絞り弁(32)と排気側に設けた排気絞り弁(33)とのうちの少なくとも一方の絞り弁の流路を絞る方向に駆動することにより、前記フィルタ(21)に捕集される粒子状物質を燃焼させる構成としてなる請求項1に記載の建設機械。
- 前記不調判定手段は、前記第1の推定捕集量(Q1)と第2の推定捕集量(Q2)との差(ΔQ=Q2-Q1)が予め設定した所定の値(ΔQs)以上になり、かつ、所定の値(ΔQs)以上の状態の継続時間(T)が予め設定した所定時間(Ts)以上になった場合に、前記再生装置(22,31)に不調があると判定する構成としてなる請求項1に記載の建設機械。
- 前記不調判定手段は、前記第2の推定捕集量(Q2)が前記捕集量閾値(Qs)以上になることにより行われる前記再生処理の間隔(ΔK)が予め設定した所定時間(ΔKs)以内になり、かつ、所定時間(ΔKs)以内の間隔で再生処理が行われた回数(C)が予め設定した所定回数(Cs)に達した場合に、前記再生装置(22,31)に不調があると判定する構成としてなる請求項1に記載の建設機械。
- 前記不調判定手段は、前記第1の推定捕集量(Q1)と第2の推定捕集量(Q2)との差(ΔQ=Q2-Q1)が予め設定した所定の値(ΔQs)以上になり、この状態で行われる前記再生処理の間隔(ΔL)が予め設定した所定時間(ΔLs)以内で、かつ、該所定時間(ΔLs)以内の間隔で再生処理が行われた回数(N)が予め設定した所定回数(Ns)に達した場合に、前記再生装置(22,31)に不調があると判定する構成としてなる請求項1に記載の建設機械。
- 前記再生装置(22,31)は、前記不調判定手段により不調があると判定した場合に、前記車体(2,4)に搭乗するオペレータに不調がある旨を報知する信号を出力する構成としてなる請求項1に記載の建設機械。
- 前記再生装置(22,31)は、前記不調判定手段により不調があると判定した場合に、前記エンジン(10)の出力を定格出力よりも小さく制限する構成としてなる請求項1に記載の建設機械。
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EP2803830A4 (en) | 2015-09-30 |
US9441526B2 (en) | 2016-09-13 |
JPWO2013105423A1 (ja) | 2015-05-11 |
EP2803830A1 (en) | 2014-11-19 |
CN104066940B (zh) | 2016-11-02 |
US20140318883A1 (en) | 2014-10-30 |
JP5815749B2 (ja) | 2015-11-17 |
KR20140116062A (ko) | 2014-10-01 |
EP2803830B1 (en) | 2017-09-27 |
KR101907727B1 (ko) | 2018-10-12 |
CN104066940A (zh) | 2014-09-24 |
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