WO2013105372A1 - 建設機械 - Google Patents
建設機械 Download PDFInfo
- Publication number
- WO2013105372A1 WO2013105372A1 PCT/JP2012/081792 JP2012081792W WO2013105372A1 WO 2013105372 A1 WO2013105372 A1 WO 2013105372A1 JP 2012081792 W JP2012081792 W JP 2012081792W WO 2013105372 A1 WO2013105372 A1 WO 2013105372A1
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- WO
- WIPO (PCT)
- Prior art keywords
- engine
- particulate matter
- filter
- exhaust gas
- differential pressure
- Prior art date
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
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- 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
- E02F9/20—Drives; Control devices
- E02F9/2025—Particular purposes of control systems not otherwise provided for
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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
- E02F9/268—Diagnosing or detecting failure of vehicles with failure correction follow-up actions
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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
- F01N13/0097—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 the purifying devices are arranged in a single housing
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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
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- 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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/021—Engine temperature
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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
- F02D2200/04—Engine intake system parameters
- F02D2200/0404—Throttle position
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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
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
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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
- F02D2200/0802—Temperature of the exhaust gas treatment 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
- 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
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/04—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps
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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
- 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
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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 provided with an exhaust gas purification device which is suitably used for removing harmful substances from exhaust gas, such as a diesel engine.
- construction machines such as hydraulic shovels and hydraulic cranes are capable of raising and lowering on the front side of the upper revolving structure, a lower traveling unit capable of self-propelled, an upper revolving unit pivotally mounted on the lower traveling unit, and It is comprised by the provided working device.
- the upper revolving superstructure mounts an engine for driving a hydraulic pump at the rear of the revolving frame, and a cab, a fuel tank, a hydraulic oil tank and the like are installed on the front side of the revolving frame.
- a diesel engine is generally used as an engine serving as a prime mover for construction machinery.
- the exhaust gas emitted from such a diesel engine may contain harmful substances such as particulate matter (PM: Particulate Matter) and nitrogen oxides (NOx).
- the construction machine is provided with an exhaust gas purification device for purifying the exhaust gas in an exhaust pipe forming an exhaust gas passage of the engine.
- An exhaust gas purification apparatus is an oxidation catalyst (eg, Diesel Oxidation Catalyst, abbreviated DOC) that oxidizes and removes nitrogen monoxide (NO), carbon monoxide (CO), hydrocarbons (HC), etc. contained in exhaust gas. And a particulate matter removal filter (eg, Diesel Particulate Filter, abbreviated as DPF) disposed downstream of the oxidation catalyst to capture and remove particulate matter in exhaust gas.
- Diesel Oxidation Catalyst abbreviated DOC
- DPF Diesel Particulate Filter
- the particulate matter removing filter By the way, in the particulate matter removing filter, the particulate matter is deposited on the filter as the particulate matter is collected, whereby the filter is clogged. For this reason, when a certain amount of particulate matter is collected, it is necessary to remove the particulate matter from the filter and regenerate the filter.
- the regeneration of the filter can be performed, for example, by raising the temperature of the exhaust gas by performing fuel injection for regeneration processing called post injection, and burning the particulate matter deposited on the filter.
- Patent Document 2 Patent Document 3
- Patent Document 2 when an abnormality is detected in a regeneration related device, that is, a device such as a sensor used to estimate the amount of collection of particulate matter collected by the filter, any abnormality is detected. Even in the case of this device, the output of the engine is limited. However, depending on the device in which the abnormality is detected, it may be possible to continue the operation or it may be preferable to take measures to stop the engine as soon as possible.
- a regeneration related device that is, a device such as a sensor used to estimate the amount of collection of particulate matter collected by the filter.
- Patent Document 2 when it is preferable to take measures to stop the engine, there is a possibility that the operation may be continued.
- the filter has enough room to collect particulate matter, the output of the engine is excessively limited, for example, the construction machine is operated from the work site to the maintenance site There is also a risk that it will not be possible.
- the present invention has been made in view of the problems of the prior art described above, and it is an object of the present invention to provide a construction machine capable of taking necessary failsafe measures depending on a failed detector.
- the construction machine collects particulate matter in exhaust gas discharged from the engine by means of a vehicle body on which an operator boardes, an engine mounted on the vehicle body, and an exhaust side of the engine and a filter.
- An exhaust gas purification device, a regeneration device for regenerating the filter by burning particulate matter collected by the filter, and detecting an operating state of the engine, the exhaust gas purification device and the regeneration device It comprises a state detection device configured of a plurality of types of detectors, and a control device that controls the engine and the reproduction device based on detection values of the detectors that configure the state detection device.
- the state detection device is a differential pressure which is a difference between the pressure on the inlet side and the pressure on the outlet side of the filter of the exhaust gas purification device.
- a differential pressure detector to be detected is included, and the control device determines whether there is a failure in the differential pressure detector that constitutes the state detection device or a failure in a detector other than the differential pressure detector.
- the filter is particulated based on the differential pressure detected by the differential pressure detector.
- Over-deposition determining means for determining whether or not the substance is excessively deposited, and when the fault determining means determines that the detector has a fault, and / or particles of the filter are determined by the over-deposition determining means. Determined that the material was deposited excessively If it was notified the failure to the operator, and / or that has a structure and a driving limiting means for limiting the output of the engine.
- the over-accumulation determination means detects particulate matter in the filter based on the differential pressure detected by the differential pressure detector. It is determined whether excessive deposition has occurred. For this reason, while it is determined that the particulate matter is not excessively deposited on the filter by the over-deposition determination means, the operation can be continued by performing a slight operation restriction by the operation restriction means. . This can prevent the engine output from being excessively limited if there is a failure in a detector other than the differential pressure detector, and operate the construction machine from the work site to the maintenance site and perform necessary repairs , Exchange, maintenance.
- the operation restriction means By performing the operation restriction of the above, it is possible to prevent the operation from being forced to continue. In this case, the construction machine can be moved from the work site by not stopping the engine immediately. Thereby, while the construction machine is moved from the work site, necessary repair, replacement, and maintenance can be performed.
- the operation limiting means is determined by the fault determining means that there is a fault in a detector other than the differential pressure detector, and the excess deposition determining means determines that the particulate matter is excessively contained in the filter. If it is determined that the differential pressure detector is not deposited, a slight operation restriction is performed, and if the fault determining unit determines that the differential pressure detector has a fault, or if the over-deposited determining unit determines particulates in the filter If it is determined that the substance is excessively deposited, it is configured to perform heavy operation restriction heavier than the light operation restriction.
- the mild operation limitation notifies the operator of the failure and performs the engine speed limitation
- the severe operation limitation notifies the operator of the failure and the engine speed limitation.
- the configuration of performing the fuel injection amount restriction According to this configuration, it is possible to prevent the continuation of the driving force while suppressing the output of the engine from being excessively limited.
- the operation limiting means determines that the differential pressure detector has a fault by the fault determining means, or that the particulate matter is excessively deposited on the filter by the over deposition determining means.
- the engine is stopped when a predetermined time set in advance has passed. According to this configuration, by appropriately setting the predetermined time until the engine is stopped, it is possible to simultaneously move the construction machine from the work site and prevent the operation from being forcibly continued. be able to.
- the differential pressure detector is a pair of pressure sensors for detecting the pressure on the inlet side and the outlet side of the filter
- the state detection device is configured Detectors other than the differential pressure detector among the detectors that detect the speed of the engine, a rotation sensor that detects the number of revolutions of the engine, a cooling water temperature sensor that detects the temperature of cooling water of the engine, and air drawn into the engine
- FIG. 1 It is a front view which shows the hydraulic shovel applied to embodiment of this invention. It is a top view of the partially broken figure which expands and shows a hydraulic shovel in the state which removed a cab and some exterior covers among the upper revolving superstructures in FIG. It is a block diagram which shows an engine, an exhaust gas purification apparatus, a regeneration apparatus, a control apparatus, and a state detection apparatus. It is a flowchart which shows the control content by the control apparatus in FIG. It is a flowchart which shows the reproduction
- 1 is a small hydraulic shovel used for excavation work of earth and sand.
- the hydraulic shovel 1 is mounted on a self-propelled crawler lower traveling body 2 and the lower traveling body 2 so as to be able to turn via the turning device 3, and the upper turning which constitutes the vehicle body together with the lower traveling body 2.
- It is roughly constituted by the body 4 and the working device 5 provided on the front side of the upper swing body 4 so as to be able to move up and down.
- the work device 5 is configured as a swing post type work device, and for example, a swing post 5A, a boom 5B, an arm 5C, a bucket 5D as a work tool, and a swing cylinder 5E that swings the work device 5 left and right.
- the boom cylinder 5F, the arm cylinder 5G, the bucket cylinder 5H and the like are provided (see FIG. 2).
- the upper swing body 4 is composed of a swing frame 6, an exterior cover 7, a cab 8 and a counterweight 9 which will be described later.
- the pivoting frame 6 forms a structure of the upper pivoting body 4, and the pivoting frame 6 is mounted on the lower traveling body 2 via the pivoting device 3.
- the turning frame 6 is provided with a counterweight 9 and an engine 10 described later on the rear side, and a cab 8 described later is provided on the left front side.
- the revolving frame 6 is provided with an exterior cover 7 located between the cab 8 and the counterweight 9, and this exterior cover 7 together with the revolving frame 6, the cab 8 and the counterweight 9 is an engine 10 and a hydraulic pump 17.
- a space for accommodating the heat exchanger 19, the exhaust gas purification device 20 and the like is defined.
- the cab 8 is mounted on the left front side of the turning frame 6, and the cab 8 internally defines an operator's cab on which the operator rides. Inside the cab 8, a driver's seat on which an operator is seated, various operation levers, an alarm 40 described later (see FIG. 3) and the like are disposed.
- the counterweight 9 balances the weight with the working device 5, and the counterweight 9 is attached to the rear end of the swing frame 6 while being located 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 so that the counterweight 9 is accommodated within the vehicle width of the lower traveling body 2.
- Reference numeral 10 denotes an engine disposed laterally on the rear side of the swing frame 6.
- the engine 10 is mounted on a 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 for drawing in the outside air, and an exhaust pipe 12 forming a part of an exhaust gas passage for discharging the exhaust gas.
- An exhaust gas purification device 20 described later is connected to the exhaust pipe 12 and provided.
- the intake pipe 11 is provided on the intake side of the engine 10, and the connection portion of the intake pipe 11 to the engine 10 is an intake manifold including a plurality of branch pipes.
- An air cleaner 13 for cleaning the outside air is connected to the tip end side of the intake pipe 11, and an intake throttle valve 25 described later is provided in the middle of the intake pipe 11.
- the exhaust pipe 12 is provided on the exhaust side of the engine 10, and a portion of the exhaust pipe 12 connected to the engine 10 is an exhaust manifold including a plurality of branch pipes.
- An exhaust throttle valve 26 described later is provided in the middle of the exhaust pipe 12.
- the engine 10 is an electronically controlled engine, and the amount of supplied fuel 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 the fuel injected into the cylinder (not shown) of the engine 10 based on the control signal output from the control device 41 described later. Do.
- the fuel injection device 14 together with the intake throttle valve 25 and the exhaust throttle valve 26 constitute a regeneration device 24 described later.
- the regeneration device 24 adjusts the opening degree of the intake throttle valve 25 and the exhaust throttle valve 26 in accordance with the control signal of the control device 41 and adjusts the fuel injection amount to the cylinder by the fuel injection device 14
- the temperature of the exhaust gas is raised, and the particulate matter deposited on the particulate matter removal filter 23 of the exhaust gas purification device 20 described later is burned and removed.
- the reflux pipe 15 is provided between the intake pipe 11 and the exhaust pipe 12, and the reflux pipe 15 is configured to recirculate a part of the exhaust gas discharged from the engine 10 into the exhaust pipe 12 to the intake pipe 11. is there.
- an exhaust gas recirculation valve (EGR valve) 16 which is opened and closed by a control signal from a control device 41 described later is provided at a midway portion of the reflux pipe 15.
- the exhaust gas recirculation valve 16 regulates the amount of recirculation of the exhaust gas that is recirculated from the exhaust pipe 12 to the intake pipe 11, and nitrogen oxides in the exhaust gas (the exhaust gas is recirculated to the intake side) NOx can be reduced.
- the hydraulic pump 17 is mounted on the left side of the engine 10, and the hydraulic pump 17 constitutes a hydraulic source together with a hydraulic oil tank (not shown).
- the hydraulic pump 17 is constituted of, for example, a variable displacement swash plate type, an oblique axis type or a radial piston type hydraulic pump.
- the hydraulic pump 17 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 18 is mounted on the left side of the engine 10, and the hydraulic pump 17 transmits the rotational output of the engine 10 via the power transmission 18.
- the hydraulic pump 17 is driven by the engine 10 to discharge pressure oil (hydraulic oil) toward a control valve (not shown).
- the heat exchanger 19 is located on the right side of the engine 10 and provided on the swing frame 6, and the heat exchanger 19 includes, for example, a radiator, an oil cooler, and an intercooler. That is, the heat exchanger 19 not only cools the engine 10 but also cools the pressure oil (hydraulic oil) returned to the hydraulic oil tank.
- an exhaust gas purification device 20 for purifying the exhaust gas discharged from the engine 10 will be described.
- reference numeral 20 denotes an exhaust gas purification device provided on the exhaust side of the engine 10.
- the exhaust gas purification device 20 is disposed at the upper left side of the engine 10, for example, at a position above the power transmission device 18, and the exhaust pipe 12 of the engine 10 is connected upstream thereof.
- the exhaust gas purification device 20 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. More specifically, particulate matter in exhaust gas exhausted from the engine 10 is collected by a particulate matter removal filter 23 described later.
- the engine 10 formed of a diesel engine is highly efficient and excellent in durability.
- the exhaust gas of the engine 10 contains harmful substances such as particulate matter (PM), nitrogen oxides (NOx) and carbon monoxide (CO).
- the exhaust gas purification device 20 attached to the exhaust pipe 12 includes an oxidation catalyst 22 described later that oxidizes and removes carbon monoxide (CO) and the like in the exhaust gas, and And a particulate matter removal filter 23 described later for collecting and removing the particulate matter (PM).
- the exhaust gas purification device 20 has, for example, a cylindrical casing 21 configured by detachably connecting a plurality of cylinders before and after.
- a oxidation catalyst 22 and a particulate matter removal filter 23 as a filter are removably accommodated.
- the oxidation catalyst 22 is made of, for example, a ceramic cell-like cylinder having an outer diameter size equal to the inner diameter size of the casing 21.
- a large number of through holes (not shown) are formed in the axial direction, and the inner surface is coated with a noble metal.
- the oxidation catalyst 22 oxidizes carbon monoxide (CO), hydrocarbon (HC), etc. contained in the exhaust gas by circulating the exhaust gas in the respective through holes under the condition of a predetermined temperature. It removes and removes nitrogen oxide (NO) as nitrogen dioxide (NO2).
- the particulate matter removal filter 23 is disposed downstream of the oxidation catalyst 22 in the casing 21.
- the particulate matter removal filter 23 purifies exhaust gas by collecting particulate matter in exhaust gas discharged from the engine 10 and burning and removing the collected particulate matter.
- the particulate matter removal filter 23 is formed of a cellular cylinder in which a large number of small holes (not shown) are provided in the axial direction in a porous member made of, for example, a ceramic material.
- the particulate matter removal filter 23 collects particulate matter through many small holes, and the trapped particulate matter is burned and removed by the regeneration treatment of the regeneration device 24 described later. As a result, the particulate matter removal filter 23 is regenerated.
- Reference numeral 24 denotes a regenerating apparatus for regenerating the filter 23 by burning particulate matter collected by the particulate matter removing filter 23.
- the regenerating apparatus 24 includes the fuel injection device 14 described above and an intake air described later.
- the throttle valve 25 and the exhaust throttle valve 26 are generally configured.
- the regeneration device 24 drives at least one of the intake throttle valve 25 and the exhaust throttle valve 26 in the direction to narrow the flow path in accordance with a command signal (control signal) of the control device 41 described later.
- the fuel injection amount to the cylinder by the fuel injection device 14 is adjusted. Thereby, as 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 23 is burned and removed.
- the intake throttle valve 25 is provided on the side of the intake pipe 11 of the engine 10, and the intake throttle valve 25 constitutes a regeneration device 24 that performs regeneration of the particulate matter removal filter 23.
- the intake air throttle valve 25 is normally held in an open state (for example, an opening degree corresponding to a fuel injection amount or a fully open state) by a control signal from the control device 41.
- the intake throttle valve 25 is driven in the direction to narrow the flow path by the control signal from the control device 41.
- the intake air throttle valve 25 throttles the amount of intake air 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 side rises by burning the fuel whose air-fuel ratio tends to be rich, and is collected by the particulate matter removal filter 23 Particulate matter can be burned and removed.
- the exhaust throttle valve 26 is provided on the exhaust pipe 12 side of the engine 10, and the exhaust throttle valve 26 also constitutes a regeneration device 24 that performs regeneration processing of the particulate matter removal filter 23.
- the exhaust throttle valve 26 is held in a fully open state at normal times by a control signal from the control device 41.
- the regeneration processing is performed, the exhaust throttle valve 26 is driven in the direction to narrow the flow path by the control signal from the control device 41, and control is performed to narrow the opening degree.
- the exhaust throttle valve 26 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 control device 41 increases the fuel injection amount by the fuel injection device 14 of the engine 10 correspondingly to the load. As a result, the temperature of the exhaust gas rises, and the particulate matter collected by the particulate matter removal filter 23 can be burned and removed.
- Reference numeral 27 denotes a state detection device for detecting the operating states of the engine 10, the exhaust gas purification device 20 and the regeneration device 24.
- the state detection device 27 includes a plurality of types of detectors, specifically, a rotation sensor 28 described later, a cooling water temperature sensor 29, an intake temperature sensor 30, an exhaust temperature sensor 31, 32, 33, 34, and a pressure sensor It is roughly configured by 35 and 36 and opening degree sensors 37, 38 and 39.
- the pressure sensors 35, 36 correspond to differential pressure detectors
- the other sensors 28 to 34, 37 to 39 correspond to detectors other than differential pressure detectors.
- the state detection device 27 is an example of a sensor (detector) provided in the small hydraulic excavator 1. Therefore, the sensors 28 to 34 and 37 to 39 other than the pressure sensors 35 and 36 are appropriately attached depending on the structure of the engine 10, the exhaust gas purification device 20 and the like.
- the rotation sensor 28 detects the number of rotations (rotational speed) of the engine 10.
- the rotation sensor 28 detects the number of rotations of the engine 10 and outputs a detection signal to a control device 41 described later.
- the control device 41 has, for example, an engine speed N detected by the rotation sensor 28, a fuel injection amount F injected by the fuel injection device 14, and exhaust gas before the oxidation catalyst 22 detected by the exhaust temperature sensor 32 described later.
- the amount of particulate matter collected by the particulate matter removal filter 23 is estimated, and based on the first estimated amount of collection Q1, which is the estimated amount of collection. , It is determined whether or not the reproduction process is to be performed.
- the fuel injection amount F can be determined from, for example, the 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, for example, control It can also be calculated from a control signal (fuel injection command) output from the device 41 to the fuel injection device 14.
- the cooling water temperature sensor 29 detects the temperature (water temperature) of the cooling water for the engine 10.
- the cooling water temperature sensor 29 detects the temperature of the engine cooling water, and outputs a detection signal to the control device 41 described later. Do.
- the temperature of the engine cooling water is used to monitor the operating state of the engine 10, to control the engine 10 and the regeneration device 24 as necessary, to calculate the state quantity, and the like.
- the intake air temperature sensor 30 detects the temperature of the intake air (intake air temperature). As shown in FIG. 3, the intake air temperature sensor 30 is attached downstream of the intake throttle valve 25 in the middle of the intake pipe 11 to detect the temperature of the air taken into the engine 10. The intake air temperature detected by the intake air temperature sensor 30 is output to a control device 41 described later as a detection signal. The intake air temperature is used to monitor the operating state of the engine 10, to control the engine 10 and the regeneration device 24 as necessary, to calculate the state quantity, and the like.
- the exhaust temperature sensors 31, 32, 33, 34 detect the temperature of the exhaust gas (exhaust temperature). As shown in FIG. 3, among the exhaust temperature sensors 31, 32, 33 and 34, the throttle valve front exhaust temperature sensor 31 is attached to the upstream side of the exhaust throttle valve 26 in the middle of the exhaust pipe 12.
- the pre-catalyst exhaust temperature sensor 32 is mounted upstream of the oxidation catalyst 22 in the casing 21 of the exhaust gas purification device 20.
- the pre-filter exhaust temperature sensor 33 is mounted on the upstream side of the particulate matter removal filter 23 in the casing 21 of the exhaust gas purification device 20.
- the post-filter exhaust temperature sensor 34 is attached to the downstream side of the particulate matter removal filter 23 in the casing 21 of the exhaust gas purification device 20.
- the pre-throttling valve exhaust temperature sensor 31 detects the temperature of the exhaust gas on the upstream side of the exhaust throttle valve 26.
- the pre-catalyst exhaust temperature sensor 32 detects the temperature of the exhaust gas on the upstream side of the oxidation catalyst 22.
- the pre-filter exhaust temperature sensor 33 detects the temperature of the exhaust gas on the upstream side of the particulate matter removal filter 23.
- the post-filter exhaust temperature sensor 34 detects the temperature of the exhaust gas on the downstream side of the particulate matter removal filter 23. Exhaust temperature detected by each exhaust temperature sensor 31, 32, 33, 34 is output to a control device 41 described later as a detection signal. Each exhaust temperature is used to monitor the operating state of the engine 10, the exhaust gas purification device 20 and the regeneration device 24, or to estimate the amount of particulate matter collected by the particulate matter removal filter 23, for example. .
- Reference numerals 35 and 36 denote pressure sensors provided on the casing 21 of the exhaust gas purification device 20 as differential pressure detectors. As shown in FIG. 3, the pair of pressure sensors 35, 36 are disposed apart from each other on the inlet side (upstream side) and the outlet side (downstream side) of the particulate matter removal filter 23, and It outputs to the control apparatus 41 mentioned later.
- the control device 41 calculates, for example, the differential pressure ⁇ P from the pressure P1 on the inlet side detected by the pressure sensor 35 and the pressure P2 on the outlet side detected by the pressure sensor 36.
- the amount of particulate matter collected by the particulate matter removal filter 23 is estimated based on the differential pressure ⁇ P, the exhaust temperature and the exhaust gas flow rate, and the second amount Based on the estimated collection amount Q2, it is determined whether or not the regeneration process is to be performed.
- the opening degree sensors 37, 38, 39 detect the open state of the throttle valve (the intake throttle valve 25, the exhaust throttle valve 26, the exhaust gas recirculation valve 16) for narrowing the flow path of the intake or the exhaust.
- the intake throttle valve opening degree sensor 37 is attached to the intake throttle valve 25 and detects the opening degree.
- An exhaust throttle valve opening degree sensor 38 is attached to the exhaust throttle valve 26 and detects the opening degree.
- the exhaust gas recirculation valve opening degree sensor 39 is attached to the exhaust gas recirculation valve 16 and detects the opening degree.
- the opening degree detected by each opening degree sensor 37, 38, 39 is output to a control device 41 described later as a detection signal.
- Each opening degree is used to monitor the operating state of the engine 10, the exhaust gas purification device 20 and the regeneration device 24, or to estimate the amount of particulate matter collected by the particulate matter removal filter 23, for example. .
- the alarm 40 is provided in the cab 8 near the driver's seat.
- the annunciator 40 is connected to a control device 41 described later, and indicates to the operator that there is a fault in the sensors 28 to 39 constituting the state detection device 27 based on a command (notification signal) from the control device 41, It is informed that the operation restriction is performed according to the failure.
- the annunciator 40 can be configured by a buzzer for emitting an alarm sound, a speaker for emitting an audio, a light or a monitor for displaying information contents, or the like.
- the alarm device 40 determines that the detector of the state detection device 27 has a fault, the alarm device 40 emits an alarm sound, an alarm display, etc., based on a command (alarm signal) from the controller device 41, etc. The operator is notified accordingly.
- Reference numeral 41 denotes a control unit (control unit) including a microcomputer and the like.
- the control device 41 controls the engine 10 and the reproduction device 24 based on the detection values of the respective sensors 28 to 39 constituting the state detection device 27.
- the input side is each detector of the fuel injection device 14 and the state detection device 27, that is, the rotation sensor 28, the cooling water temperature sensor 29, the intake temperature sensor 30, the exhaust temperature sensors 31, 32, 33, 34, pressure sensors 35, 36, opening degree sensors 37, 38, 39, etc. are connected.
- the output side of the control device 41 is connected to the fuel injection device 14, the intake throttle valve 25, the exhaust throttle valve 26, the exhaust gas recirculation valve 16, the alarm 40 and the like.
- the control device 41 has a storage unit 41A composed of a ROM, a RAM, etc.
- this storage unit 41A processing programs for regeneration processing and operation restriction shown in FIG. 4 and FIG. 5 described later, particles prepared in advance
- a first map, a second map, a calculation formula, a preset collection amount threshold value Qs, a differential pressure threshold value ⁇ Ps, a predetermined time Ts, and the like for estimating the amount of the collection material are stored.
- the first map for estimating the amount of particulate matter collected by the particulate matter removal filter 23 is a collection amount based on at least the number of revolutions N of the engine and the fuel injection amount F.
- the correspondence relationship between the engine speed N, the fuel injection amount F, and the particulate matter discharge amount Hm is obtained in advance by experiment etc., and the correspondence relationship is created as a map is there.
- the calculation formula for estimating the amount of collection is assumed that the estimated amount of collection is Q1, the amount of emission of particulate matter obtained by the first map is Hm, and it is removed from the particulate matter removal filter 23 by the regeneration process.
- the amount of particulate matter (regeneration amount) is J, it can be expressed as the following equation 1.
- the amount of particulate matter removed by the regeneration process is, for example, the flow rate of the exhaust gas determined from the engine speed N and the fuel injection amount F, and the exhaust temperature before the oxidation catalyst 22 And, it can be calculated from the relationship between the NO 2 conversion rate which is obtained by adding the exhaust temperature to the nitrogen oxide (NOx) emission amount obtained from the engine speed N and the fuel injection amount F.
- the regeneration amount J is, for example, the flow rate of the exhaust gas determined from the engine speed N and the fuel injection amount F, and the exhaust temperature before the oxidation catalyst 22
- NOx nitrogen oxide
- the second map for estimating the trapped amount of particulate matter collected by the particulate matter removal filter 23 is for estimating the trapped amount based on at least the differential pressure ⁇ P of the particulate matter removal filter 23. belongs to. Specifically, in the second map, for example, the correspondence relationship between the differential pressure ⁇ P, the exhaust gas flow rate, and the estimated trapped amount Q2 is obtained in advance by experiments and the like, and the correspondence relationship is created as a map.
- the differential pressure ⁇ P of the particulate matter removing filter 23 is calculated by the following equation 2: (See Japanese Patent Application Laid-Open No. 2004-132358).
- the collection amount threshold Qs is a reference value for determining whether or not the regeneration process is to be performed. That is, the collection amount threshold Qs is a first estimated collection amount Q1 estimated by the first map and the calculation formula, and a second estimated collection amount Q2 estimated by the second map and When at least one of them becomes more than the collection amount threshold Qs, it is for judging that regeneration processing is necessary.
- This collection amount threshold value Qs can be performed in advance based on experiments, calculations, simulations, etc. so that regeneration processing can be performed in an appropriate state, for example, in a state where sufficient particulate matter has been collected by the particulate matter removal filter 23. Set that value.
- the differential pressure threshold ⁇ Ps is a reference value for determining whether the particulate matter has excessively deposited on the particulate matter removal filter 23. That is, the differential pressure threshold ⁇ Ps is for determining that the particulate matter is excessively deposited on the filter 23 when the differential pressure ⁇ P exceeds the differential pressure threshold ⁇ Ps.
- the differential pressure threshold ⁇ Ps is excessively deposited, for example, although the filter 23 has a sufficient margin for trapping the particulate matter so as to appropriately determine whether the particulate matter is excessively deposited or not. In order not to be determined, the value is set in advance based on experiments, calculations, simulations and the like.
- the predetermined time Ts is a time from when it is determined that a failure occurs to when the engine 10 is stopped. Specifically, it is determined that the pressure sensor 35, 36 is determined to have a failure, and the predetermined time Ts is determined to have a failure in a sensor other than the pressure sensor 35, 36. It is the time from the determination until the engine 10 is stopped when it is determined that the heavy matter has accumulated excessively. For a predetermined time Ts, if a failure occurs, it is possible to secure a time for moving the hydraulic shovel 1 from the work site, and to prevent an excessive malfunction due to the continuation of the operation, in advance. Set based on etc.
- the control device 41 causes failure in the automatic reproduction control (first function) for automatically performing the reproduction processing according to the processing program of FIG. 4 and FIG. 5 described later, and the sensors 28 to 39 constituting the state detection device 27. In the case where an operation restriction control (second function) is performed to restrict the operation according to the failure.
- the control device 41 estimates the collection amount of particulate matter collected by the particulate matter removal filter 23 based on at least the fuel injection amount F and the engine speed N, and at least the particulate matter removal filter 23 It is also estimated based on the differential pressure ⁇ P of Next, the control device 41 performs at least the first estimated collection amount Q1 estimated based on the two estimated collection amounts, that is, 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 23 is equal to or larger than the collection amount threshold Qs, and the regeneration process needs to be performed.
- the fuel injection amount to the cylinder by the fuel injection device 14 is adjusted.
- the particulate matter deposited on the particulate matter removal filter 23 is burned and removed.
- the control device 41 determines whether or not the sensors 28 to 39 constituting the state detection device 27 have a failure such as malfunction, abnormality, malfunction, failure or the like. Next, when it is determined that the control device 41 has a fault in at least one of the sensors 28 to 39 constituting the state detection device 27, the pressure sensor 35 or 36 has a fault or the pressure sensor It is determined whether there is a failure in the sensors 28 to 34 and 37 to 39 other than 35 and 36. Next, when it is determined that there is a failure in a sensor other than the pressure sensors 35, 36, the control device 41 causes the particulate matter removal filter 23 to be detected based on the differential pressure ⁇ P detected by the pressure sensors 35, 36. It is determined whether particulate matter has deposited excessively.
- control device 41 performs operation restriction in accordance with the failure of the sensors 28 to 39 and whether or not the particulate matter is excessively deposited on the particulate matter removal filter 23. Specifically, if it is determined that the sensors 28 to 39 have a fault, and if it is determined that the particulate matter has excessively deposited on the particulate matter removal filter 23, there is a fault to the operator Inform the effect that excessive particulate matter has accumulated. In this case, the control device 41 outputs a signal (notification signal) for notifying the notification to the notification device 40, thereby causing the notification device 40 to issue an notification sound and a notification display to perform failure notification.
- a signal notification signal
- control device 41 limits the output of the engine 10 such as limiting the number of revolutions of the engine 10 or limiting the amount of fuel injection.
- control device 41 outputs a control signal to the fuel injection device 14 of the engine 10 so that the engine speed N and the fuel injection amount F become smaller as compared with the case where there is no failure in the sensors 28 to 39.
- the exhaust port 42 is provided on the downstream side of the exhaust gas purification device 20, and the exhaust port 42 is located on the downstream side of the particulate matter removal filter 23 and connected to the outlet side of the casing 21.
- the exhaust port 42 includes, for example, a chimney for discharging exhaust gas after the purification processing into the atmosphere, and a silencer.
- the hydraulic shovel 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described next.
- the operator of the hydraulic shovel 1 gets into the cab 8 of the upper revolving superstructure 4, starts the engine 10, and drives the hydraulic pump 17. Thereby, the pressure oil from the hydraulic pump 17 is supplied to various actuators via the control valve.
- the traveling control lever When the operator boarding the cab 8 operates the traveling control lever, the lower traveling body 2 can be moved forward or backward.
- the work device 5 can be raised and lowered to carry out a digging operation of earth and sand.
- the small hydraulic excavator 1 has a small turning radius by the upper turning body 4, it is possible to perform side groove excavation work while turning the top turning body 4 even in a narrow work site such as an urban area, for example.
- the exhaust gas purification device 20 can oxidize and remove hydrocarbons (HC), nitrogen oxides (NO) and carbon monoxide (CO) in the exhaust gas by the oxidation catalyst 22.
- the particulate matter removal filter 23 collects particulate matter contained in the exhaust gas.
- the purified exhaust gas can be discharged to the outside through the downstream exhaust port 42.
- the collected particulate matter is burned and removed (regeneration treatment) by the regeneration device 24.
- faults such as malfunction, malfunction, malfunction, or the like may occur in the sensors 28 to 39 constituting the state detection device 27.
- it is preferable to take measures to stop the engine 10 if the operation is continued, it may lead to a major obstacle.
- the control device 41 determines the failure of the sensors 28 to 39 constituting the state detection device 27 and is necessary according to the sensors 28 to 39 where the failure occurs. It is configured to be able to take various failsafe measures. Specifically, the controller 41 performs the processing shown in FIGS. 4 and 5 to perform the regeneration processing and the operation restriction processing.
- step 1 when the processing operation of FIG. 4 is started by the start (operation) of the engine 10, in step 1, whether or not the sensors 28 to 39 constituting the state detection device 27 are normal, ie, the sensors 28 to 39 have abnormality It is determined whether or not a failure such as a malfunction or failure has occurred. This determination can be made, for example, based on whether a predetermined detection result is obtained from each of the sensors 28 to 39 (given a self-diagnosis) when a predetermined operation state or a predetermined signal (self-check signal) is given. . If it is determined in this step 1 that "YES", that is, all the sensors 28 to 39 constituting the state detection device 27 are normal (all the sensors 28 to 39 have no fault), the operation restriction process is performed. Since it is not necessary to perform the process, the process proceeds to the reproduction process of step 2.
- step 2 the amount of particulate matter collected by the particulate matter removal filter 23 is estimated, and the regeneration process is automatically performed according to the estimated amount of collection.
- this malfunction determination process as shown in FIG. 5, it is determined from the first estimated collection amount Q1 and the second estimated collection amount Q2 whether the regeneration process is necessary, and it is determined that the regeneration process is necessary.
- a control signal indicating that the reproduction is to be performed is output to the reproduction device 24 to control the automatic reproduction.
- the estimation process of the first estimated collection amount Q1 will be described. That is, at step 21 of the regeneration process, the engine speed N is read from the rotation sensor 28. Next, at step 22, the fuel injection amount F is read.
- the fuel injection amount F can be determined 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, for example, a control device It can also be calculated from a control signal (fuel injection command) output from the fuel injection device 41 to the fuel injection device 14.
- step 23 based on the engine speed N and the fuel injection amount F read in the previous steps 21 and 22, the amount of particulate matter collected by the particulate matter removal filter 23, that is, The estimated collection amount Q1 of 1 is estimated (calculated).
- the first estimated collection amount Q1 can be estimated using the above-described first map stored in the storage unit 41A of the control device 41 and a calculation formula.
- the emission amount per unit time is determined from the engine speed N and the fuel injection amount F using the above-described first map, and the emission amount is integrated to calculate the total emission from the start of the operation to the present time Find the quantity Hm. Then, based on the above equation (1), the first estimated collection at the present time is achieved by reducing the amount (regeneration amount) J of the particulate matter removed in the regeneration processing up to the present time from the total discharge amount Hm.
- the quantity Q1 can be estimated.
- step 24 the pressures P1 and P2 are read from the pressure sensors 35 and 36. That is, the pressure P1 on the upstream side of the particulate matter removal filter 23 and the pressure P2 on the downstream side are read.
- step 25 the differential pressure ⁇ P between the pressure P1 on the upstream side of the particulate matter removal filter 23 and the pressure P2 on the downstream side is calculated by the above-mentioned equation (2).
- the trapped amount of particulate matter trapped by the particulate matter removal filter 23, 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 41A of the control device 41. That is, the second estimated collection amount Q2 at the present time 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 correspond to each other.
- first estimated collection amount Q1 is estimated in step 23 and the second estimated collection amount Q2 is estimated in step 26, these first estimated collection amounts Q1 and / or in step 27 Whether or not the regeneration process is to be performed is determined depending on whether the second estimated collected amount Q2 is equal to or greater than a predetermined collected amount threshold Qs. If "YES" is determined in this step 27, that is, if it is determined that at least one of the estimated collection amounts Q1 and Q2 is equal to or more than the collection amount threshold Qs, the particulate matter is removed from the particulate matter removal filter 23 Since there is sufficient collection amount, the routine proceeds to step 28, where automatic regeneration is started.
- step 28 the control device 41 outputs a control signal indicating that at least one of the intake throttle valve 25 and the exhaust throttle valve 26 is driven in the valve closing direction (the direction in which the flow path is narrowed).
- a control signal to increase the fuel injection amount is output to the fuel injection device 14.
- step 27 determines whether the particulate matter is removed from the particulate matter removal filter 23 Since it is not collected sufficiently, it proceeds to return without going through step 28. Then, the process returns to the start of FIG. 4 through the return of FIG. 5 and the return of FIG. 4, and the processing after step 1 is repeated.
- step 1 "NO", that is, all the sensors 28 to 39 constituting the state detection device 27 are not normal (at least one of the sensors 28 to 39 has a failure) If it is determined, the operation restriction process needs to be performed, so the process proceeds to step 3.
- step 3 it is determined whether the pressure sensors 35 and 36 are normal. This determination can also be made by self-diagnosis. If it is determined in this step 3 that "YES", that is, the pressure sensors 35 and 36 are normal (the pressure sensors 35 and 36 have no obstacles), the pressure sensors 35 and 36 are used to remove particulate matter. Since it can be determined whether or not the particulate matter has excessively deposited on the filter 23, the process proceeds to step 4, and the pressures P1 and P2 are read from the pressure sensors 35 and 36. That is, the pressure P1 on the upstream side of the particulate matter removal filter 23 and the pressure P2 on the downstream side are read. In the next step 5, the differential pressure ⁇ P between the pressure P1 on the upstream side of the particulate matter removal filter 23 and the pressure P2 on the downstream side is calculated by the above-mentioned equation (2).
- step 6 it is determined whether the particulate matter is excessively deposited on the particulate matter removal filter 23 based on whether or not the differential pressure ⁇ P exceeds a preset differential pressure threshold value ⁇ Ps. That is, when the differential pressure ⁇ P is equal to or less than the differential pressure threshold ⁇ Ps set in advance, the particulate matter is not excessively deposited on the particulate matter removal filter 23 (the filter 23 has a margin for collecting the particulate matter) It is determined that On the other hand, when the differential pressure ⁇ P exceeds the differential pressure threshold ⁇ Ps set in advance, it is assumed that the particulate matter is excessively deposited on the particulate matter removal filter 23 (the filter 23 has no time to collect the particulate matter). judge.
- step 6 If it is determined in step 6 that “YES”, that is, it is determined that the particulate matter is not excessively deposited on the particulate matter removal filter 23, the process proceeds to step 7 and the fail safe 1 is determined. That is, if “YES” is determined in the step 3 and “YES” is determined in the step 6, the sensors 28 to 34, 37 to 39 other than the pressure sensors 35 and 36 have a fault and are particulate Since it is a case where the particulate matter is not excessively deposited on the substance removal filter 23, the operation limit of failsafe 1 which is a slight operation limit is performed.
- the operator is informed that there is a failure in the sensors 28 to 34, 37 to 39 other than the pressure sensors 35, 36. That is, the control device 41 outputs a notification signal indicating that a notification sound, notification display, etc. is issued to the notification device 40, and that the sensors 28 to 34, 37 to 39 other than the pressure sensors 35, 36 have a fault to the operator.
- the control device 41 outputs a notification signal indicating that a notification sound, notification display, etc. is issued to the notification device 40, and that the sensors 28 to 34, 37 to 39 other than the pressure sensors 35, 36 have a fault to the operator.
- the rotational speed limit of the engine 10 is performed. That is, when there is a fault in the sensors 28 to 34 and 37 to 39 other than the pressure sensors 35 and 36, it is found from the detection results of the pressure sensors 35 and 36 that the particulate matter is not excessively deposited on the particulate matter removal filter 23. While the determination is made, the number of rotations of the engine 10 is limited so that, for example, the hydraulic shovel 1 can continue to be operated from the work site to the maintenance site. If the engine speed is limited at step 10, the process returns to the start, and the processes after step 1 are repeated.
- step 3 determines whether the pressure sensors 35 and 36 are normal (the pressure sensors 35 and 36 have a fault) or if it is determined in step 6, "NO", that is, particulate If it is determined that the particulate matter is excessively deposited on the material removal filter 23, the process proceeds to step 10 and is determined as fail safe 2.
- step 3 when “NO” is determined in step 3, the pressure sensors 35 and 36 have a fault, and the pressure sensors 35 and 36 cause particulate matter to be removed from the particulate matter removal filter 23. It is in a state where it can not be determined whether or not it is excessively deposited.
- step 6 if “NO” in step 6, the pressure sensors 35, 36 are normal, but the sensors 28 to 34, 37 to 39 other than the pressure sensors 35, 36 have a fault, and The particulate matter removing filter 23 is in a state where particulate matter is excessively deposited. Therefore, in these two cases, failsafe 2 operation limitation is performed, which is a severe operation limitation that is heavier than the above-described failsafe 1 mild operation limitation.
- step 11 the operator is informed that there is a fault in the pressure sensors 35, 36 or that the particulate matter is excessively deposited on the particulate matter removal filter 23. That is, the control device 41 outputs a notification signal indicating that a notification sound, notification display, etc. is issued to the notification device 40, to the operator that there is a failure in the pressure sensors 35, 36, or the particulate matter is excessive in the filter 23. Report that it is deposited in the area (over deposition).
- step 12 the engine speed limit and the fuel injection amount limit of the engine 10 are performed. That is, the fact that the process has proceeded to step 12 is, first, when there is a failure in the pressure sensors 35, 36, secondly, even if there is no failure in the pressure sensors 35, 36, sensors 28 other than the pressure sensors 35, 36 This is a case where there is a defect of ⁇ 34, 37 ⁇ 39 and the particulate matter is excessively deposited on the particulate matter removal filter 23. Therefore, in step 12, the engine 10 is limited in its rotational speed and the fuel injection amount so that excessive load is not applied to the engine 10, the exhaust gas purification device 20 and the regeneration device 24 or the operation is not continued forcibly.
- step 13 After notifying the operator in step 11 and limiting the rotation speed and fuel injection amount of the engine 10 in step 12, proceed to step 13 and determine whether or not a predetermined time Ts has passed in advance. Do. That is, after the pressure sensors 35 and 36 are determined not to be normal in step 3 or the elapsed time from when it is determined that the particulate matter is excessively deposited on the particulate matter removal filter 23 in step 6 is specified. It is determined whether time Ts has been exceeded. If it is determined in step 13 that "YES", that is, it is determined that the preset predetermined time Ts has elapsed, the process proceeds to step 14, and the engine 10 is stopped. That is, since it is not preferable to continue the operation, the engine 10 is stopped.
- step 14 is performed to secure the time for moving the hydraulic shovel 1 from the work site, for example. Instead, the process proceeds to return and returns to the start, and repeats the processing from step 1 onward.
- step 6 Based on the pressure difference ⁇ P detected by the pressure sensors 35 and 36 by the process of 6, it is determined whether the particulate matter is excessively deposited on the particulate matter removal filter 23 or not. For this reason, while it is determined in step 6 that the particulate matter is not excessively deposited on the filter 23, a slight operation restriction (engine speed restriction) is performed by the processing of step 8 and step 9. It can be made possible to continue driving.
- the engine 10 is stopped after the predetermined time Ts elapses by the processes of step 13 and step 14. Therefore, the hydraulic shovel 1 can be moved from the work site before the predetermined time Ts elapses. Thereby, necessary repair, exchange, and maintenance can be performed in a state where the hydraulic shovel 1 is moved from the work site.
- the predetermined time Ts appropriately, it is possible to make the hydraulic shovel 1 movable from the work site and to prevent the operation from being forced to continue.
- steps 1 and 3 shown in FIG. 4 is a specific example of the failure determining means which is a constituent feature of the present invention
- the processing of step 6 is a specific example of the over deposition determining means.
- the processes of steps 7 to 14 show specific examples of the operation limiting means.
- the alarm 40 notifies the operator, restricts the number of revolutions of the engine 10 and restricts the amount of fuel injection, and stops the engine 10 after the predetermined time Ts has elapsed.
- the present invention is not limited to this. For example, it may be configured to perform notification to the operator by an alarm as light operation restriction, and to limit engine speed and fuel injection amount as heavy operation restriction. .
- the warning level can be used to continue normal work simply by warning the operator as a light limit, and the work can be performed as a heavy limit.
- the operation restriction can be appropriately selected, for example, to a level at which the hydraulic shovel 1 can not move but can not continue.
- the rotation sensor 28, the cooling water temperature sensor 29, the intake temperature sensor 30, the exhaust temperature sensors 31, 32, 33, 34, and the pressure sensor 35 are used as detectors that constitute the state detection device 27. , 36 and the opening degree sensors 37, 38 and 39 have been described as an example.
- a detector such as an intake air flow rate sensor that detects an intake air amount, or an exhaust gas flow rate sensor that detects an exhaust gas flow rate may be used. That is, the detector which comprises a state detection apparatus can use various detectors as a detector which detects the working state of an engine, an exhaust gas purification apparatus, and a regeneration device.
- the exhaust temperature sensor 32 may be omitted.
- the exhaust gas purification device 20 is configured by the oxidation catalyst 22 and the particulate matter removal filter 23 has been described as an example.
- the present invention is not limited to this.
- a urea injection valve, a selective reduction catalyst device or the like may be used in combination.
- the construction machine provided with the exhaust gas purification device according to the present invention is not limited to this, and may be applied to, for example, medium-sized or larger hydraulic shovels.
- the present invention can be widely applied to construction machines such as hydraulic excavators, wheel loaders, forklifts, hydraulic cranes and the like provided with 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
20 排気ガス浄化装置
23 粒子状物質除去フィルタ(フィルタ)
24 再生装置
27 状態検出装置
28 回転センサ(検出器)
29 冷却水温センサ(検出器)
30 吸気温センサ(検出器)
31 絞り弁前排気温センサ(検出器)
32 触媒前排気温センサ(検出器)
33 フィルタ前排気温センサ(検出器)
34 フィルタ後排気温センサ(検出器)
35,36 圧力センサ(差圧検出器)
37 吸気絞り弁開度センサ(検出器)
38 排気絞り弁開度センサ(検出器)
39 排気還流弁開度センサ(検出器)
40 報知器
41 制御装置
Claims (5)
- オペレータが搭乗する車体(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)の排気側に設けられフィルタ(23)によって前記エンジン(10)から排出される排気ガス中の粒子状物質を捕集する排気ガス浄化装置(20)と、前記フィルタ(23)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の再生処理を行う再生装置(24)と、前記エンジン(10)、排気ガス浄化装置(20)および再生装置(24)の稼働状態を検出するための複数種類の検出器により構成される状態検出装置(27)と、該状態検出装置(27)を構成する各検出器の検出値に基づいて前記エンジン(10)および再生装置(24)の制御を行う制御装置(41)とを備えてなる建設機械において、
前記状態検出装置(27)は、前記排気ガス浄化装置(20)のフィルタ(23)の入口側の圧力と出口側の圧力との差である差圧を検出する差圧検出器(35,36)を含んで構成し、
前記制御装置(41)は、
前記状態検出装置(27)を構成する差圧検出器(35,36)に障害があるか該差圧検出器(35,36)以外の検出器に障害があるかを判定する障害判定手段と、
該障害判定手段により前記差圧検出器(35,36)以外の検出器に障害があると判定された場合に、前記差圧検出器(35,36)により検出される差圧に基づいて、前記フィルタ(23)に粒子状物質が過剰に堆積したか否かを判定する過堆積判定手段と、
前記障害判定手段により前記検出器に障害があると判定された場合、および/または前記過堆積判定手段により前記フィルタ(23)に粒子状物質が過剰に堆積したと判定された場合に、前記オペレータにその障害を報知し、および/または前記エンジン(10)の出力を制限する運転制限手段とを備える構成としたことを特徴とする建設機械。 - 前記運転制限手段は、
前記障害判定手段により前記差圧検出器(35,36)以外の検出器に障害があると判定され、かつ、前記過堆積判定手段により前記フィルタ(23)に粒子状物質が過剰に堆積していないと判定された場合は、軽度の運転制限を行い、
前記障害判定手段により前記差圧検出器(35,36)に障害があると判定された場合、または前記過堆積判定手段により前記フィルタ(23)に粒子状物質が過剰に堆積したと判定された場合は、前記軽度の運転制限よりも重い重度の運転制限を行う構成としてなる請求項1に記載の建設機械。 - 前記軽度の運転制限は、オペレータにその障害を報知すると共に前記エンジン(10)の回転数制限を行い、
前記重度の運転制限は、オペレータにその障害を報知すると共に前記エンジン(10)の回転数制限および燃料噴射量制限を行う構成としてなる請求項2に記載の建設機械。 - 前記運転制限手段は、前記障害判定手段により前記差圧検出器(35,36)に障害があると判定された場合、または前記過堆積判定手段により前記フィルタ(23)に粒子状物質が過剰に堆積したと判定された場合は、予め設定した所定時間を経過すると前記エンジン(10)を停止させる構成としてなる請求項1に記載の建設機械。
- 前記状態検出装置(27)を構成する検出器のうち前記差圧検出器(35,36)は、前記フィルタ(23)の入口側と出口側との圧力を検出する一対の圧力センサ(35,36)であり、
前記状態検出装置(27)を構成する検出器のうち前記差圧検出器(35,36)以外の検出器は、前記エンジン(10)の回転数を検出する回転センサ(28)と、前記エンジン(10)の冷却水の温度を検出する冷却水温センサ(29)と、前記エンジン(10)に吸入される空気の温度を検出する吸気温センサ(30)と、排気ガスの温度を検出する排気温センサ(31,32,33,34)と、吸気または排気の流路を絞る絞り弁(16,25,26)の開度を検出する開度センサ(37,38,39)とのうちの少なくとも何れかのセンサである請求項1に記載の建設機械。
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CN201280066786.6A CN104040126B (zh) | 2012-01-13 | 2012-12-07 | 工程机械 |
JP2013553212A JP5815748B2 (ja) | 2012-01-13 | 2012-12-07 | 建設機械 |
EP12865127.0A EP2803832B1 (en) | 2012-01-13 | 2012-12-07 | Construction machine |
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US11236654B2 (en) | 2017-03-01 | 2022-02-01 | Hitachi Construction Machinery Tierra Co., Ltd. | Construction machine |
JP2019112953A (ja) * | 2017-12-20 | 2019-07-11 | 株式会社クボタ | エンジン |
Also Published As
Publication number | Publication date |
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JPWO2013105372A1 (ja) | 2015-05-11 |
CN104040126B (zh) | 2016-06-29 |
CN104040126A (zh) | 2014-09-10 |
KR20140116064A (ko) | 2014-10-01 |
US20140326529A1 (en) | 2014-11-06 |
EP2803832A4 (en) | 2015-12-02 |
US9151015B2 (en) | 2015-10-06 |
JP5815748B2 (ja) | 2015-11-17 |
EP2803832B1 (en) | 2017-01-04 |
EP2803832A1 (en) | 2014-11-19 |
KR101934610B1 (ko) | 2019-01-02 |
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