WO2017138495A1 - 排気浄化装置および作業車両 - Google Patents
排気浄化装置および作業車両 Download PDFInfo
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- WO2017138495A1 WO2017138495A1 PCT/JP2017/004253 JP2017004253W WO2017138495A1 WO 2017138495 A1 WO2017138495 A1 WO 2017138495A1 JP 2017004253 W JP2017004253 W JP 2017004253W WO 2017138495 A1 WO2017138495 A1 WO 2017138495A1
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- Prior art keywords
- throttle valve
- exhaust
- exhaust gas
- control device
- work vehicle
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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
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
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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
- F01N3/103—Oxidation catalysts for HC and CO only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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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
- F02D41/0275—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 NOx trap or adsorbent
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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
- F02D41/14—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
- F02D41/146—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 NOx content or concentration
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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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
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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
- F01N2900/1602—Temperature of exhaust gas 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
- 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
- F01N2900/1621—Catalyst conversion efficiency
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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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
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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
- F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
- F02D2700/04—Controlling by throttling the exhaust conduit
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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
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to an exhaust purification device and a work vehicle.
- an exhaust gas aftertreatment device such as a diesel oxidation catalyst (DOC) or a selective reduction catalyst (SCR) is provided in an exhaust path of an engine.
- PM Particulate matter
- NOx nitrogen oxides
- an exhaust throttle valve is provided in the exhaust path upstream of the exhaust gas aftertreatment device to control the opening of the exhaust throttle valve.
- the exhaust gas temperature is controlled to optimize the function of the exhaust gas aftertreatment device.
- Patent Document 2 discloses a technique for forming a bearing member from a heat-resistant alloy made of a sintered metal such as Inconel.
- the bearing member must be formed of an expensive heat-resistant alloy, and there is a problem that the manufacturing cost increases.
- it is possible to reduce the sliding speed of the exhaust throttle valve, it can be used only when the exhaust throttle valve is closed because the rise of the engine slows down, and is insufficient to reduce the sliding speed. There is a problem of being.
- An object of the present invention is to provide an exhaust purification device and a work vehicle that can extend the operating life of an exhaust throttle valve due to wear of a valve body and a bearing member without increasing manufacturing costs.
- the exhaust emission control device of the present invention An exhaust purification device mounted on a work vehicle, An exhaust path through which exhaust gas discharged from the engine flows, A throttle valve that changes a path area of the exhaust path; An exhaust gas aftertreatment device disposed downstream of the throttle valve; A valve control device for controlling the opening degree of the throttle valve, The valve control device In the low load region below the predetermined load range and the high load region exceeding the predetermined load range, the opening degree of the throttle valve is controlled to be larger than that in the middle load region that is the predetermined load range.
- the valve control device controls the opening degree of the throttle valve larger in the low load region and the high load region than in the middle load region, so that the work vehicle starts to accelerate and decelerates.
- the throttle valve opening is maintained in a large state, the increase of the sliding distance accompanying the throttle valve opening control is suppressed, the wear of the valve body and the bearing member is reduced, and the throttle valve The operating life can be extended.
- the schematic diagram which shows schematic structure of the working vehicle provided with the exhaust gas purification apparatus which concerns on embodiment of this invention.
- Sectional drawing which shows the structure of the exhaust throttle valve in the said embodiment.
- Sectional drawing which shows the principal part of the exhaust throttle valve in the said embodiment.
- the functional block diagram which shows the structure of the control apparatus in the said embodiment.
- the schematic diagram which shows the opening degree control map of the exhaust throttle valve in the said embodiment.
- FIG. 1 is a schematic diagram showing a schematic configuration of a work vehicle 1 on which the exhaust purification device 10 according to the present embodiment is mounted.
- the work vehicle 1 is a machine that performs excavation, leveling, and transportation of earth and sand at construction sites such as mines and roads.
- construction machines such as wheel loaders and wheel-type backhoes are used.
- a transport vehicle such as a forklift.
- the work vehicle 1 includes a diesel engine 2, a turbocharger 3 that rotates a turbine with exhaust gas of the diesel engine 2 and compresses air supplied to the diesel engine 2, a control device 8, a monitor device 9, and an exhaust purification device. 10.
- the diesel engine 2 is provided with an engine speed detection device 6 that detects the engine speed and a fuel injection device 7 that injects fuel into the diesel engine 2. Detection data of the engine speed detection device 6 is output to the control device 8. Further, the control device 8 controls the fuel injection device 7 according to an accelerator operation or the like.
- the monitor device 9 includes a display unit and an input unit.
- the display unit includes a liquid crystal display.
- the display unit displays various information such as the cooling water temperature and the remaining amount of fuel, and cautions.
- the monitor device 9 according to the present embodiment is provided with a notification unit 91 that performs a notification for urging execution of stationary manual regeneration described later, and the monitor device 9 functions as a notification device that notifies the operator of various information.
- the input unit includes switches (buttons) provided around the display unit. The function of each input unit is displayed on the display unit with icons and the like. For this reason, the operator can easily grasp which switch to press when performing the stationary manual regeneration. Note that if the touch panel type monitor device 9 is used, a switch displayed on the touch panel may be touched.
- the monitor device 9 of this embodiment is provided with a switch 92 that instructs execution of stationary manual regeneration.
- the input unit is not limited to a switch provided integrally with the monitor device 9, and may be configured by a switch installed in a housing or the like separate from the monitor device 9.
- the exhaust purification device 10 performs processing such as oxidation and reduction of residual substances such as PM and NOx in the exhaust gas, and is controlled by the control device 8.
- the exhaust purification device 10 includes, in order from the upstream side in the flow direction of exhaust gas discharged from the diesel engine 2, an exhaust throttle valve 20, a DOC device 30 as an exhaust gas aftertreatment device, a urea water injection system 40, And an SCR device 50.
- the DOC device 30, the urea water injection system 40, and the SCR device 50 are provided in the middle of the exhaust path 11 through which the exhaust gas from the diesel engine 2 flows.
- the exhaust path 11 includes an inlet pipe 12 that introduces exhaust gas from the turbocharger 3 connected to the diesel engine 2 to the DOC device 30, an outlet pipe 13 that connects the DOC device 30 and the SCR device 50, and the SCR device. And an outlet pipe 14 connected to 50 outlets.
- Exhaust throttle valve 20 The exhaust throttle valve 20 is configured by a butterfly valve or the like disposed in the inlet pipe 12 and changes the path area of the exhaust path 11.
- the valve opening of the exhaust throttle valve 20 is controlled by the control device 8, and the temperature of the exhaust gas is adjusted by adjusting the valve opening, as will be described later.
- the exhaust throttle valve 20 is rotated by a housing 21 to which the inlet pipe 12 (see FIG. 1) is connected, a motor 22 provided on the upper portion of the housing 21, and the motor 22. And a valve body 23. As shown in FIGS. 2 and 3, the valve body 23 is provided on a shaft 24 that rotates by rotation of a drive shaft (not shown) of the motor 22, and the opening of the exhaust passage 11 by rotation. And a flap 25 to be adjusted.
- a hole is formed in the housing 21, and the shaft 24 is inserted into the hole of the housing 21.
- a spherical washer 26 is provided on the outer periphery of the shaft 24 and closes the hole of the housing 21.
- the shaft 24 is integrated with a retainer 27 provided at an upper portion, and a spring 28 presses the retainer 27 upward.
- a bush 29 of the shaft 24 is attached in the recess 21 ⁇ / b> A of the housing 21, and the upper surface of the spherical washer 26 is slidably in contact with the lower surface of the bush 29.
- a pinion gear is provided on the drive shaft of the motor 22, and a gear (not shown) that meshes with the pinion gear is provided at the base end of the shaft 24 of the valve body 23.
- the gear rotates through the pinion gear, and the valve body 23 rotates accordingly.
- the valve body 23 is rotated by the motor 22, the lower surface 29 ⁇ / b> A of the bush 29 and the upper surface 26 ⁇ / b> A of the spherical washer 26 slide in the rotation direction of the valve body 23.
- the sliding distance between the lower surface 29A of the bush 29 and the upper surface 26A of the spherical washer 26 increases, and the lower surface of the bush 29 gradually wears.
- the DOC device 30 includes a case, and a diesel oxidation catalyst is accommodated in the case.
- the DOC device 30 is a catalyst that raises the exhaust gas temperature to a predetermined high temperature range by oxidizing and heating the fuel (dosing fuel) supplied into the exhaust gas as necessary.
- the fuel supplied into the exhaust gas as necessary.
- Urea water injection system 40 The urea water injection system 40 adds a urea aqueous solution as a reducing agent aqueous solution to exhaust gas.
- a urea water injection system 40 is attached to the outlet pipe 13 of the DOC device 30, an injection nozzle 41 that injects a urea aqueous solution into the outlet pipe 13, a urea water tank 42 in which the urea aqueous solution is stored, urea water And a pump unit 43 for supplying a urea aqueous solution from the tank 42 to the injection nozzle 41.
- the control device 8 controls the injection nozzle 41 and the pump unit 43 to inject the urea aqueous solution from the injection nozzle 41 into the outlet pipe 13.
- the aqueous urea solution injected into the outlet pipe 13 is hydrolyzed by the heat of the exhaust gas to become ammonia.
- SCR device 50 reduces and purifies nitrogen oxides in exhaust gas by using ammonia obtained by hydrolyzing an aqueous urea solution as a reducing agent. Ammonia is supplied to the SCR device 50 together with the exhaust gas as a reducing agent.
- An ammonia reduction catalyst may be provided on the downstream side of the SCR device 50.
- the ammonia reduction catalyst is a catalyst that oxidizes ammonia that has not been used in the SCR device 50 to render it harmless, and further reduces emission of exhaust gas.
- the exhaust purification device 10 is provided with various sensors for detecting the status of the diesel engine 2 and the exhaust purification device 10. That is, in the inlet pipe 12, a NOx sensor 32 that detects the concentration of NOx contained in the exhaust gas is disposed on the downstream side of the exhaust throttle valve 20.
- the DOC device 30 is provided with an inlet temperature sensor 31 that measures the inlet temperature of the DOC device 30 and an outlet temperature sensor 45 that measures the outlet temperature of the DOC device 30.
- the SCR device 50 is provided with an SCR internal temperature sensor 47 and an SCR outlet temperature sensor 51 that measures the outlet temperature of the SCR device 50.
- An SCR outlet NOx sensor 52 that detects the concentration of NOx contained in the exhaust gas discharged from the SCR device 50 is disposed at the outlet pipe 14 connected to the SCR device 50.
- These sensors are connected to the control device 8 via a controller area network (CAN) 18 and output measurement data to the control device 8.
- CAN controller area network
- Control device 8 The control device 8 as a valve control device controls the opening degree of the exhaust throttle valve 20 during steady operation of the work vehicle 1, controls the temperature of the exhaust gas to around 300 ° C., and improves the purification efficiency of the SCR device 50. Yes.
- the control device 8 includes an engine speed acquisition unit 81, a fuel injection amount acquisition unit 82, and a valve opening degree control unit 83.
- the engine speed acquisition unit 81 acquires the speed of the diesel engine 2 based on the detection value of the engine speed detection device 6.
- the fuel injection amount acquisition unit 82 detects the fuel injection amount injected by the fuel injection device 7 using a sensor (not shown), and acquires the detection value detected by the sensor.
- the fuel injection amount varies mainly depending on the accelerator operation amount by the operator.
- the valve opening degree control unit 83 controls the opening degree of the exhaust throttle valve 20 based on the engine speed acquired by the engine speed acquisition unit 81 and the fuel injection amount acquired by the fuel injection amount acquisition unit 82. . Specifically, the valve opening degree control unit 83 controls the opening degree of the exhaust throttle valve 20 by referring to the data table TBL shown in FIG. In the data table TBL, the opening degree of the exhaust throttle valve 20 is recorded according to the rotational speed of the diesel engine 2 and the fuel injection amount by the fuel injection device 7. For example, in the case of the engine rotational speed RP1 and the fuel injection amount IN1 The opening degree OP1 of the exhaust throttle valve 20 is recorded. The valve opening control unit 83 outputs the opening OP1 to the exhaust throttle valve 20 as an opening control command, and the motor 22 of the exhaust throttle valve 20 rotates the valve body 23 according to the opening OP1.
- the opening degree of the exhaust throttle valve 20 is set according to the fuel injection amount, and is divided into a low load area AR1, a medium load area AR2, and a high load area AR3.
- the low load region AR1 below the predetermined load range is a region below the torque driven by the work vehicle 1, and is a region where the fuel injection amount is about 10% or less of the fuel injection amount at the rated output of the diesel engine 2.
- the opening of the exhaust throttle valve 20 in the low load area AR1 is set to fully open (0%). It should be noted that the opening degree of the exhaust throttle valve 20 in the low load area AR1 does not need to be fully opened, and may be set larger than the opening degree in the middle load area AR2 described later.
- the medium load region AR2 that is a predetermined load range is a region of torque that is required when the work vehicle 1 performs normal loading and unloading operations, and the fuel injection amount at the rated output of the diesel engine 2 is approximately 10%. % Or more and less than about 40%.
- the opening degree of the exhaust throttle valve 20 in the medium load region AR2 is approximately 70% to approximately 90%, and the opening degree of the exhaust throttle valve 20 is changed in accordance with fluctuations in the fuel injection amount and the engine speed.
- the high load area AR3 exceeding the predetermined load range is an area where the exhaust gas temperature is equal to or higher than the regeneration processing temperature of the DOC device 30 and the purification processing temperature of the SCR device 50, and the work vehicle 1 travels toward the load.
- the high load region AR3 is a region of approximately 40% or more and 100% or less of the fuel injection amount at the rated output of the diesel engine 2.
- the opening degree of the exhaust throttle valve 20 in the high load area AR3 is set to fully open (0%). In other words, the opening degree of the exhaust throttle valve 20 is set smaller in the medium load region than in other load regions.
- the map MAP is divided into a low engine speed area AR4 and a high engine speed area AR5 in the medium load area AR2.
- the low engine speed AR4 is an area below the speed of the diesel engine 2 that can be driven by the work vehicle 1, that is, a low idling area.
- the engine speed is about 400 rpm to about 1100 rpm. It is an area.
- the opening degree of the exhaust throttle valve 20 in the low rotation area AR4 is set to fully open (0%).
- the high engine speed range AR5 is an area where the diesel engine 2 can be driven by the work vehicle 1, and is an area where the engine speed exceeds approximately 1100 rpm.
- the opening degree of the exhaust throttle valve 20 in the high rotation region AR5 is set to be approximately 90% from approximately 70% described above.
- the opening degree is fully opened when the work vehicle 1 is in a low idling state at low temperatures such as in winter, and the viscosity of the engine oil and the lubricating oil of the drive system becomes high.
- the stirring resistance and sliding resistance of the pump and the like increase. Therefore, the driving torque increases and the fuel injection amount of the diesel engine 2 increases.
- the opening degree control of the exhaust throttle valve 20 is performed in this state, the exhaust throttle valve 20 moves finely by approaching the area AR2 where the fuel injection amount is large and entering or not entering the areas AR1 and AR2.
- the sliding distance of the throttle valve 20 will increase. Therefore, when the work vehicle 1 is in the idling state, the exhaust throttle valve 20 is not opened and the sliding distance of the exhaust throttle valve 20 can be increased by fully opening the exhaust throttle valve 20 regardless of whether the temperature is low or high. It is reduced.
- the control device 8 measures the temperature of the exhaust gas on the inlet side of the DOC device 30 with the inlet temperature sensor 31 and controls the valve opening of the exhaust throttle valve 20 according to the measured temperature to adjust the temperature of the exhaust gas. To do.
- the control device 8 acquires the engine speed from the engine speed detection device 6, acquires the exhaust gas temperature on the inlet side of the DOC device 30 from the inlet temperature sensor 31, and acquires the temperature of the exhaust gas on the inlet side of the DOC device 30 from the NOx sensor 32. Obtain the concentration of NOx.
- control device 8 acquires the temperature of the exhaust gas on the outlet side of the DOC device 30 from the outlet temperature sensor 45, acquires the temperature of the SCR catalyst from the SCR internal temperature sensor 47, and acquires the SCR outlet temperature from the SCR outlet temperature sensor 51. And the concentration of NOx on the outlet side of the SCR device 50 is acquired from the SCR outlet NOx sensor 52.
- the control device 8 controls the operations of the fuel injection device 7, the exhaust throttle valve 20, the injection nozzle 41, and the pump unit 43 based on the acquired data and information such as an accelerator operation by the operator.
- the fuel injection amount changes from the low rotation region AR4 to the high load region AR3 because the accelerator travels from the idling state ST1 to the accelerator fully open state ST2.
- the exhaust throttle valve 20 is kept fully open.
- the intermediate throttle region AR2 in which the opening degree of the exhaust throttle valve 20 changes is passed.
- the opening of the exhaust throttle valve 20 on the map MAP has a response delay, the opening of the exhaust throttle valve 20 does not shift to the middle load area AR2 but directly to the low load area AR1.
- the fully opened state is maintained, and the sliding distance of the exhaust throttle valve 20 does not increase.
- the opening degree of the valve 20 is maintained in a fully open state. Therefore, even if the fuel injection amount changes from the low load region AR1 to the high load region AR3, the sliding distance of the exhaust throttle valve 20 does not increase, and the wear of the bush 29 of the exhaust throttle valve 20 is minimized. It is possible to prevent the exhaust throttle valve 20 from malfunctioning.
- the work vehicle 1 such as a wheel loader performs a typical operation of transitioning from the idling state ST1 to the accelerator fully open state ST2 and the deceleration state ST3, and thus this embodiment is effective.
- the present invention is not limited to the above-described embodiments, and includes the following modifications.
- the opening degree of the exhaust throttle valve 20 in the low engine speed AR4 is set to be fully open.
- the present invention is not limited to this, and the low engine speed AR4 is similar to the high engine speed AR5.
- the opening may be set.
- the wheel loader is the work vehicle 1, but the present invention is not limited to this, and the present invention may be applied to a wheel type backhoe, a forklift, or the like. In short, the present invention can be adopted if it is a wheel type work vehicle.
- the opening degree control of the exhaust throttle valve 20 provided in the exhaust path 11 is performed.
- the present invention is not limited to this, and the present invention may be applied to an intake throttle valve.
- the specific structure, shape, and the like when implementing the present invention may be other structures as long as the object of the present invention can be achieved.
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Abstract
Description
PMの燃焼や、NOxの浄化は、排気ガスの温度を上昇させる必要があるため、排気ガス後処理装置の上流の排気経路中に、排気スロットルバルブを設け、排気スロットルバルブの開度を制御することにより、排気温度を制御して、排気ガス後処理装置の機能の最適化を図っている。
このため、特許文献2には、軸受部材をインコネル等の焼結金属からなる耐熱合金により形成する技術が開示されている。
また、排気スロットルバルブの摺動速度を低下させることも考えられるが、エンジンの回転の立ち上がりが遅くなるため、排気スロットルバルブを閉じる場合のみにしか使用できず、摺動速度を下げるには不十分であるという課題がある。
作業車両に搭載される排気浄化装置であって、
エンジンから排出される排気ガスが流れる排気経路と、
前記排気経路の経路面積を変化させるスロットルバルブと、
前記スロットルバルブの下流に配置される排気ガス後処理装置と、
前記スロットルバルブの開度制御を行うバルブ制御装置とを備え、
前記バルブ制御装置は、
所定の負荷範囲以下の低負荷領域および所定の負荷範囲を超える高負荷領域において、所定の負荷範囲となる中負荷領域よりも、前記スロットルバルブの開度を大きく制御することを特徴とする。
[1]排気浄化装置10の概略構成
図1は、本実施形態に係る排気浄化装置10が搭載された作業車両1の概略構成を示す模式図を示す。ここで、作業車両1は、例えば、鉱山や道路等の建設現場において、掘削、地均し等の作業や土砂等の運搬を行う機械であり、例えば、ホイールローダ、ホイール式バックホー等の建設機械や、フォークリフト等の運搬車両が該当する。
作業車両1は、ディーゼルエンジン2と、ディーゼルエンジン2の排気ガスによってタービンを回転してディーゼルエンジン2に供給する空気を圧縮するターボチャージャ3と、制御装置8と、モニタ装置9と、排気浄化装置10とを備える。
モニタ装置9は、表示部と入力部を備える。表示部は、液晶ディスプレイなどで構成される。
表示部は、冷却水温、燃料残量等の各種情報、コーションなどを表示する。本実施形態のモニタ装置9には、後述する定置手動再生の実行を促す通知を行う通知部91が設けられており、モニタ装置9はオペレータに各種情報を通知する通知装置として機能する。
入力部は、表示部の周辺に設けられたスイッチ(ボタン)などで構成される。表示部には、各入力部の機能がアイコンなどで表示される。このため、オペレータは、定置手動再生を実行する場合にどのスイッチを押せばよいかを容易に把握できる。なお、タッチパネル式のモニタ装置9を用いれば、タッチパネル上に表示されたスイッチをタッチすればよい。本実施形態のモニタ装置9には、定置手動再生の実行を指示するスイッチ92が設けられている。なお、入力部は、モニタ装置9に一体に設けられるスイッチに限らず、モニタ装置9とは別の筐体等に設置されるスイッチで構成してもよい。
排気浄化装置10は、排気ガス中のPMやNOx等の残留物質の酸化や還元などの処理を行うものであり、制御装置8によって制御されている。
排気浄化装置10は、ディーゼルエンジン2から排出される排気ガスの流れ方向における上流側から順に、排気スロットルバルブ20と、排気ガス後処理装置としての、DOC装置30と、尿素水噴射システム40と、SCR装置50とを備える。
これらのDOC装置30、尿素水噴射システム40、SCR装置50は、ディーゼルエンジン2からの排気ガスが流通する排気経路11の途中に設けられる。この排気経路11は、ディーゼルエンジン2に接続されたターボチャージャ3からの排気ガスをDOC装置30に導入する入口管12と、DOC装置30とSCR装置50とを接続する出口管13と、SCR装置50の出口に接続された出口管14とを備える。
排気スロットルバルブ20は、入口管12に配置されたバタフライ弁等で構成され、排気経路11の経路面積を変化させる。排気スロットルバルブ20の弁開度は、制御装置8で制御されており、後述するように、弁開度を調整することで、排気ガスの温度を調整している。
この際、制御装置8は、詳しくは後述するが、燃料噴射量およびエンジン回転数に応じて弁開度を設定するマップデータを用いて、排気スロットルバルブ20の弁開度を制御する。
バルブ本体23は、図2および図3に示すように、モータ22の駆動軸(図示略)の回転により回転するシャフト24と、シャフト24に設けられ、回転することにより排気経路11の開度を調整するフラップ25とを備える。
シャフト24は、上部に設けられるリテーナ27と一体化されており、スプリング28がリテーナ27を上方に押しつけている。ハウジング21の凹部21A内には、シャフト24のブッシュ29が取り付けられており、球面ワッシャ26の上面は、このブッシュ29の下面と摺動可能に当接している。
モータ22によってバルブ本体23が回転すると、ブッシュ29の下面29Aと球面ワッシャ26の上面26Aは、バルブ本体23の回転方向に摺動する。バルブ本体23の回転回数が増加すると、ブッシュ29の下面29Aと球面ワッシャ26の上面26A間の摺動距離が増加し、ブッシュ29の下面が徐々に摩耗していく。ブッシュ29の下面29Aが摩耗していくと、バルブ本体23は、スプリング28によって上方に引き上げられ、フラップ25の上端25Aとハウジング21の内面21Bが干渉し、バルブ本体23の回転に大きな力が必要となり、排気スロットルバルブ20の回動調整の作動寿命が短くなる。
DOC装置30は、ケースを備え、ケースの内部にはディーゼル酸化触媒が収容されている。
DOC装置30は、排気ガス中に必要に応じて供給される燃料(ドージング燃料)を酸化、発熱させて、排気ガス温度を所定の高温域まで上昇させる触媒である。この温度が上昇した排気ガスを利用することで、排気ガス中のPMを燃焼させ、後述する出口管13等に堆積した尿素デポジットを燃焼させて焼却除去し、浄化、再生させる。
尿素水噴射システム40は、排気ガス中に還元剤水溶液としての尿素水溶液を添加するものである。このような尿素水噴射システム40は、DOC装置30の出口管13に取り付けられ、出口管13内部に尿素水溶液を噴射する噴射ノズル41と、尿素水溶液が貯蔵される尿素水タンク42と、尿素水タンク42から噴射ノズル41に尿素水溶液を供給するポンプユニット43とを備える。
制御装置8は、噴射ノズル41およびポンプユニット43を制御し、噴射ノズル41から出口管13内に尿素水溶液を噴射する。出口管13内に噴射された尿素水溶液は、排気ガスの熱によって加水分解され、アンモニアとなる。
SCR装置50は、尿素水溶液を加水分解させて得られるアンモニアを還元剤とすることで、排気ガス中の窒素酸化物を還元浄化するものである。アンモニアは、還元剤として排気ガスと共にSCR装置50へ供給される。
なお、SCR装置50の下流側にアンモニア低減触媒を設けてもよい。アンモニア低減触媒は、SCR装置50で未使用とされたアンモニアを酸化処理して無害化するものであり、排気ガスのエミッションをより低減させる。
排気浄化装置10には、ディーゼルエンジン2や排気浄化装置10の状況を検出するための各種センサが設けられている。
すなわち、入口管12において、排気スロットルバルブ20の下流側には、排気ガスに含まれるNOxの濃度を検出するNOxセンサ32が配置されている。DOC装置30には、DOC装置30の入口温度を測定する入口温度センサ31と、DOC装置30の出口温度を測定する出口温度センサ45が設けられている。
SCR装置50に接続された出口管14には、SCR装置50から排出される排気ガスに含まれるNOxの濃度を検出するSCR出口NOxセンサ52が配置されている。
これらのセンサは、Controller Area Network(CAN)18を介して制御装置8に接続され、測定データを制御装置8に出力している。
バルブ制御装置としての制御装置8は、作業車両1の定常運転時に、排気スロットルバルブ20の開度制御を行い、排気ガスの温度を300℃前後に制御し、SCR装置50の浄化効率を高めている。
制御装置8は、図4に示すように、エンジン回転数取得部81と、燃料噴射量取得部82と、バルブ開度制御部83とを備える。
エンジン回転数取得部81は、エンジン回転数検出装置6の検出値に基づいて、ディーゼルエンジン2の回転数を取得する。
燃料噴射量取得部82は、燃料噴射装置7により噴射された燃料噴射量を図示しないセンサで検出し、センサで検出された検出値を取得する。燃料噴射量は、主としてオペレータによるアクセル操作量によって変動する。
具体的には、バルブ開度制御部83は、図5に示すデータテーブルTBLを参照することにより、排気スロットルバルブ20の開度制御を行う。データテーブルTBLは、ディーゼルエンジン2の回転数、燃料噴射装置7による燃料噴射量に応じて、排気スロットルバルブ20の開度が記録されており、たとえば、エンジン回転数RP1、燃料噴射量IN1の場合における排気スロットルバルブ20の開度OP1が記録されている。バルブ開度制御部83は、開度制御指令として開度OP1を排気スロットルバルブ20に出力し、排気スロットルバルブ20のモータ22は、開度OP1に応じてバルブ本体23を回転させる。
所定の負荷範囲以下の低負荷領域AR1は、作業車両1が駆動するトルク以下の領域であり、ディーゼルエンジン2の定格出力における燃料噴射量の略10%以下の燃料噴射量の領域である。低負荷領域AR1における排気スロットルバルブ20の開度は、本実施形態では、全開(0%)に設定されている。なお、低負荷領域AR1における排気スロットルバルブ20の開度は、全開に設定されている必要はなく、後述する中負荷領域AR2における開度よりも大きく設定されていればよい。
所定の負荷範囲を超える高負荷領域AR3は、排気ガスの温度が、DOC装置30の再生処理温度、およびSCR装置50の浄化処理温度以上となる領域であり、作業車両1が積荷に向かって走行する際に必要とする領域である。具体的には、高負荷領域AR3は、ディーゼルエンジン2の定格出力における燃料噴射量の略40%以上、100%以下の領域である。高負荷領域AR3における排気スロットルバルブ20の開度は全開(0%)に設定されている。
言い換えれば、中負荷領域は、他の負荷領域よりも排気スロットルバルブ20の開度を小さく設定している。
エンジン回転数の低回転領域AR4は、作業車両1が駆動することができるディーゼルエンジン2の回転数以下の領域、すなわち、ローアイドリングの領域であり、たとえば、エンジン回転数が略400rpmから略1100rpmの領域である。低回転領域AR4における排気スロットルバルブ20の開度は全開(0%)に設定されている。
エンジン回転数の高回転領域AR5は、作業車両1が駆動することができるディーゼルエンジン2の回転数の領域であり、エンジン回転数が略1100rpmを超える領域である。高回転領域AR5における排気スロットルバルブ20の開度は、前述した略70%から略90%とされる。
そこで、作業車両1のアイドリング状態では、低温、高温を問わず、排気スロットルバルブ20の開度を全開とすることにより、排気スロットルバルブ20は動作することなく、排気スロットルバルブ20の摺動距離を低減させている。
再生処理としては、図2に示すように、噴射ノズル41から尿素水溶液を噴射すると、尿素が出口管13中で結晶化して析出する場合がある。このため、排ガス温度を高温にすることで、出口管13内の析出物(尿素デポジット)を分解する浄化処理を行う必要がある。浄化処理には、作業車両1が作動して、作業を継続しながら自動的に行う昇温制御と、作業車両1を停止させ、オペレータがモニタ装置9のスイッチ92を操作することにより、実行される定置手動再生とがあり、制御装置8によって切り換え選択されて制御される。
制御装置8は、エンジン回転数検出装置6からエンジン回転数を取得し、入口温度センサ31からDOC装置30の入口側における排気ガスの温度を取得し、NOxセンサ32からDOC装置30の入口側におけるNOxの濃度を取得する。また、制御装置8は、出口温度センサ45からDOC装置30の出口側における排気ガスの温度を取得し、SCR内部温度センサ47からSCR触媒の温度を取得し、SCR出口温度センサ51からSCR出口温度を取得し、SCR出口NOxセンサ52からSCR装置50の出口側におけるNOxの濃度を取得する。
次に、本実施形態の作用について、作業車両1の一例となるホイールローダについて、図5および図6に基づいて説明する。なお、作業車両1の出力トルクは、図5におけるトルクカーブTRQ内を遷移する。
図6に示すように、ホイールローダ等の作業車両1の典型的なVシェープ作業の積み込み動作として、まず、ディーゼルエンジン2を始動して、アイドリング状態ST1からオペレータが作業車両1の操縦を開始する。
オペレータは、積荷のある場所に到達するまでは、アクセルを全開にオンさせたアクセル全開状態ST2で操縦する。
作業車両1が積荷のある場所に近づくと、オペレータは、アクセルをオフにして、ブレーキを踏み込んで減速状態ST3に入る。
まず、アイドリング状態ST1では、エンジン回転数が、低回転領域AR4に入るので、排気スロットルバルブ20は全開状態とされる。
最後に、作業車両1が減速状態ST3になると、アクセルをオフにして、ブレーキを踏むので、燃料は噴射せず、燃料噴射量が、高負荷領域AR3から低負荷領域AR1に入り、排気スロットルバルブ20はさらに全開状態を維持することとなる。
この後、作業車両1は、土砂等の掘削作業に入ると、ディーゼルエンジン2の燃料噴射量が中負荷領域AR2に入り、排気スロットルバルブ20の開度制御が作業負荷に応じた燃料噴射量で行われる。
本発明は、前述した実施形態に限定されるものではなく、以下に示すような変形をも含むものである。
前述した実施形態では、エンジン回転数の低回転領域AR4における排気スロットルバルブ20の開度を全開に設定していたが、これに限らず、低回転領域AR4においても、高回転領域AR5と同様の開度を設定してもよい。
前述した実施形態では、ホイールローダを作業車両1としていたが、本発明はこれに限らず、ホイール式バックホー、フォークリフト等に本発明を適用してもよい。要するにホイール式の作業車両であれば、本発明を採用することができる。
その他、本発明の実施の際の具体的な構造および形状等は、本発明の目的を達成できる範囲で他の構造等としてもよい。
Claims (6)
- 作業車両に搭載される排気浄化装置であって、
エンジンから排出される排気ガスが流れる排気経路と、
前記排気経路の経路面積を変化させるスロットルバルブと、
前記スロットルバルブの下流に配置される排気ガス後処理装置と、
前記スロットルバルブの開度制御を行うバルブ制御装置とを備え、
前記バルブ制御装置は、
所定の負荷範囲以下の低負荷領域および所定の負荷範囲を超える高負荷領域において、所定の負荷範囲となる中負荷領域よりも、前記スロットルバルブの開度を大きく制御することを特徴とする排気浄化装置。 - 請求項1に記載の排気浄化装置において、
前記バルブ制御装置は、前記エンジンの所定の回転数以下の低回転領域において、前記中負荷領域よりも、前記スロットルバルブの開度を大きく制御することを特徴とする排気浄化装置。 - 請求項1または請求項2に記載の排気浄化装置において、
前記低負荷領域は、前記作業車両が駆動するトルク以下の領域であることを特徴とする排気浄化装置。 - 請求項1から請求項3のいずれか一項に記載の排気浄化装置において、
前記排気ガス後処理装置は、ディーゼル酸化触媒装置および選択触媒還元装置であることを特徴とする排気浄化装置。 - 作業車両に搭載される排気浄化装置であって、
エンジンから排出される排気ガスが流れる排気経路と、
前記排気経路の経路面積を変化させるスロットルバルブと、
前記スロットルバルブの下流に配置される排気ガス後処理装置と、
前記スロットルバルブの開度制御を行うバルブ制御装置とを備え、
前記バルブ制御装置は、
所定の負荷範囲となる中負荷領域において、他の負荷領域よりも、前記スロットルバルブの開度を小さく制御することを特徴とする排気浄化装置。 - 請求項1から請求項5のいずれか一項に記載の排気浄化装置を備えていることを特徴とする作業車両。
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PCT/JP2017/004253 WO2017138495A1 (ja) | 2017-02-06 | 2017-02-06 | 排気浄化装置および作業車両 |
JP2017511364A JP6281021B2 (ja) | 2017-02-06 | 2017-02-06 | 排気浄化装置および作業車両 |
DE112017000003.3T DE112017000003B4 (de) | 2017-02-06 | 2017-02-06 | Abgasreinigungsvorrichtung und Arbeitsfahrzeug |
US15/538,006 US10473039B2 (en) | 2017-02-06 | 2017-02-06 | Exhaust purifying device and working vehicle |
CN201780000434.3A CN107429615A (zh) | 2017-02-06 | 2017-02-06 | 排气净化装置及作业车辆 |
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CN112377313A (zh) * | 2020-11-09 | 2021-02-19 | 一汽解放汽车有限公司 | 一种电控排气管理阀及车辆 |
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WO2016068347A1 (ja) * | 2015-11-25 | 2016-05-06 | 株式会社小松製作所 | 排気浄化装置 |
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US3982515A (en) * | 1974-04-26 | 1976-09-28 | Eaton Corporation | Exhaust gas recirculation control assembly |
US4142495A (en) * | 1977-12-05 | 1979-03-06 | General Motors Corporation | Engine exhaust gas recirculation system with periodic recalibration of exhaust back pressure reference |
JPS56154539A (en) * | 1980-04-24 | 1981-11-30 | Teijin Ltd | Cut pile carpet |
US4835963A (en) * | 1986-08-28 | 1989-06-06 | Allied-Signal Inc. | Diesel engine particulate trap regeneration system |
JPH0960642A (ja) | 1995-08-29 | 1997-03-04 | Calsonic Corp | 軸受部材 |
DE19852552C2 (de) * | 1998-11-13 | 2000-10-05 | Daimler Chrysler Ag | Verfahren zum Betrieb eines im Viertakt arbeitenden Verbrennungsmotors |
JP2002349241A (ja) * | 2001-05-24 | 2002-12-04 | Isuzu Motors Ltd | ディーゼルエンジンの排気浄化装置 |
JP2004286012A (ja) | 2003-03-04 | 2004-10-14 | Toyota Industries Corp | 圧縮着火内燃機関 |
JP3868926B2 (ja) * | 2003-06-03 | 2007-01-17 | ヤンマー株式会社 | ディーゼル機関の排気ガス還流制御装置 |
JP2007002668A (ja) | 2003-07-01 | 2007-01-11 | Tokudaiji Jidosha Bunka Kenkyusho:Kk | ディーゼルエンジンの排気浄化装置並びに制御手段 |
JP4333289B2 (ja) * | 2003-09-03 | 2009-09-16 | いすゞ自動車株式会社 | 排気ガス浄化システム |
US6932062B2 (en) | 2003-11-07 | 2005-08-23 | Kabushiki Kaisha Toyota Jidoshokki | Compression ignition type internal combustion engine |
JP2006242175A (ja) | 2005-02-02 | 2006-09-14 | Tokudaiji Jidosha Bunka Kenkyusho:Kk | Pm連続再生装置およびpm連続再生方法 |
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JPS56154539U (ja) * | 1980-04-21 | 1981-11-18 | ||
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DE112017000003B4 (de) | 2023-08-10 |
US10473039B2 (en) | 2019-11-12 |
DE112017000003T5 (de) | 2017-11-09 |
CN107429615A (zh) | 2017-12-01 |
US20180223744A1 (en) | 2018-08-09 |
JP6281021B2 (ja) | 2018-02-14 |
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