WO2010026813A1 - ディーゼルエンジン - Google Patents
ディーゼルエンジン Download PDFInfo
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- WO2010026813A1 WO2010026813A1 PCT/JP2009/060363 JP2009060363W WO2010026813A1 WO 2010026813 A1 WO2010026813 A1 WO 2010026813A1 JP 2009060363 W JP2009060363 W JP 2009060363W WO 2010026813 A1 WO2010026813 A1 WO 2010026813A1
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- temperature
- particulate filter
- low
- rotation
- diesel 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0086—Filter condition indicators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0091—Including arrangements for environmental or personal protection
- B01D46/0093—Including arrangements for environmental or personal protection against fire or explosion
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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
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/448—Auxiliary equipment or operation thereof controlling filtration by temperature measuring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel 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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F02D41/04—Introducing corrections for particular operating conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
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- 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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- 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
- 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
- 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
- F02D2041/0265—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to decrease temperature of the exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—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
- 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
- F02D41/1446—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 exhaust temperatures
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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
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
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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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- 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 diesel engine technology, and more particularly, to a diesel engine technology having a particulate filter and a purification device having a regeneration means for forcibly regenerating the particulate accumulated in the particulate filter.
- a particulate filter is installed in the exhaust passage of diesel engines. It is known to be equipped with an engine exhaust gas purification device.
- the particulate filter has a porous honeycomb structure made of ceramic or the like, the inlets of the respective flow paths partitioned in a lattice shape are alternately sealed, and the flow paths in which the inlets are not sealed are as follows: Only the exhaust gas which permeate
- a predetermined low It is prohibited to enter the rotational low load range.
- the particulate filter when the temperature of the particulate filter is lowered by a predetermined temperature from the temperature at which the control for prohibiting the particulate filter from entering the low-rotation low-load rotational region is started, the particulate filter enters the low-rotation low-load region. The control which prohibits is canceled.
- an excessive temperature rise in the particulate filter can be surely prevented, and thermal deterioration of the particulate filter can be prevented. Also, thermal degradation only occurs when excessive temperature rise has occurred reliably by prohibiting entry into the predetermined low rotation and low load range only when the temperature is continuously above the specified regulation temperature for a certain time or longer. It becomes possible to prevent.
- the seventh aspect of the present invention by canceling the control that prohibits entry into the low rotation and low load range, it is possible to quickly operate in the low rotation and low load range, thereby preventing wasteful fuel consumption. Even if the temperature does not drop to a predetermined temperature, the operating range is reduced when the temperature of the particulate filter is lowered by a predetermined temperature from the temperature at which control for prohibiting the particulate filter from entering the low rotation and low load rotation range is started. Reduce the impact on driving by quickly recovering.
- FIG. 1 is a schematic diagram showing the configuration of an exhaust emission control device for a diesel engine according to the present invention
- FIG. 2 is an explanatory diagram showing the relationship between engine load and engine speed
- FIG. 3 shows the flow of low-rotation low-load prohibition control.
- FIG. 4 is a flowchart showing the flow of the low rotation / low load prohibition control
- FIG. 5 is a flowchart showing the flow of the low rotation / low load prohibition control
- FIG. 6 is a flowchart showing the flow of the low rotation / low load prohibition control. It is.
- an exhaust emission control device 1 for a diesel engine is provided in a diesel engine 2 that is an embodiment of a diesel engine in the present invention.
- the exhaust gas purification device 1 for a diesel engine purifies and discharges exhaust gas generated in the diesel engine 2.
- the diesel engine exhaust gas purification apparatus 1 includes a particulate filter 10, a detection means 20, a controller 21, a regeneration means 30, a notification means 40, and the like.
- the particulate filter 10 is disposed in the exhaust passage 2b of the diesel engine 2 and removes particulates (carbon soot, high-boiling hydrocarbon components (SOF), etc.) in the exhaust gas.
- the particulate filter 10 has a honeycomb structure composed of a porous wall of ceramic or the like, and the exhaust gas is configured to be discharged after passing through the porous wall. When the exhaust gas passes through the porous wall, particulates in the exhaust gas are collected on the porous wall. As a result, the particulates are removed from the exhaust gas.
- Detecting means 20 detects the exhaust pressure and the like on the upstream side and downstream side of the particulate filter 10.
- the detection means 20 includes an inlet-side pressure sensor 20 a disposed on the inlet side of the particulate filter 10, an outlet-side pressure sensor 20 b disposed on the outlet side of the particulate filter 10, and the particulate filter 10.
- the exhaust gas temperature is detected by a temperature sensor 20c and the like, and is connected to the controller 21.
- the operation state detection unit 35 detects the operation state of the diesel engine 2 by calculating the engine load and the like from detection values from the engine rotation detection unit 36, the engine rotation number setting unit 37, and the like. In the case of an electronic governor type engine, the rack position is also detected.
- the regeneration means 30 includes fuel injection valves 32, 32,..., An intake throttle valve 33, an inlet side exhaust throttle valve 34a, an outlet side exhaust throttle valve 34b, and the like, and is connected to the controller 21 respectively. .
- the controller 21 appropriately operates the fuel injection valves 32, 32,..., The intake throttle valve 33, the inlet side exhaust throttle valve 34a, and the outlet side exhaust throttle valve 34b to maintain the set rotational speed.
- the engine is controlled to operate in a reproducible region to be described later.
- a specific regeneration method is to perform regeneration by burning the particulates by the particulate filter 10 by increasing the fuel injection amount or by restricting the intake throttle valve 33 to increase the unburned fuel, or at the inlet side
- the fuel injection valves 32, 32,... are constituted by electromagnetic valves or the like, and directly inject fuel into a plurality of cylinders configured in the diesel engine 2. By changing the timing of fuel injection into the cylinder, it is possible to change the number of revolutions, load, etc., change the exhaust temperature, and supply unburned fuel to the exhaust gas.
- the intake throttle valve 33 is provided with a valve body that is opened and closed by an electromagnetic valve or an actuator, and is disposed in the intake path 2a of the diesel engine 2 to adjust the air inflow amount of the diesel engine 2. By changing the opening of the intake throttle valve 33, it is possible to change the exhaust gas flow rate, the exhaust temperature, and the exhaust speed.
- the inlet side exhaust throttle valve 34a includes a valve body that is opened and closed by an electromagnetic valve or an actuator, and is disposed on the inlet side of the particulate filter 10 to adjust the exhaust gas inflow amount of the particulate filter 10. .
- an electromagnetic valve or an actuator By changing the opening degree of the inlet side exhaust throttle valve 34a, the exhaust gas exhaust pressure, the exhaust flow rate, and the exhaust speed can be changed.
- the engine rotation detection means 36 is a sensor disposed on the crankshaft or flywheel to detect the rotation angle and rotation speed of the crankshaft, and is connected to the controller 21. In other words, the piston position of each cylinder is detected so that the injection timing, the injection amount, and the like can be controlled.
- the visual notification means 42 notifies the worker of the reproduction method of the particulate filter 10 with visual information.
- the visual notification means 42 is a control lamp for notifying that the low-rotation low-load prohibition mode described later has been started.
- the visual notification means 42 is not limited to this, and can be constituted by, for example, a liquid crystal screen.
- controller 21 can change the exhaust gas pressure and the exhaust speed by controlling the opening degree of the inlet side exhaust throttle valve 34a and changing the exhaust gas pressure before the particulate filter 10.
- controller 21 can control the opening degree of the outlet side exhaust throttle valve 34b, change the exhaust gas pressure in the particulate filter 10, and change the exhaust gas pressure and the exhaust speed.
- the explanatory diagram shown in FIG. 2 is a diagram of a load pattern representing the relationship between the engine speed R and the engine load L when the diesel engine 2 is driven, and is stored in the storage unit 22.
- the engine speed is plotted on the horizontal axis
- the engine load correlated with the rack position is plotted on the vertical axis.
- the load pattern LP of the present embodiment is a region surrounded by a maximum torque line ML that is an upwardly convex line, and represents the relationship between the engine speed R and the engine load L when the exhaust gas temperature is a renewable temperature. Divided vertically at the boundary line BL.
- the upper area across the boundary line BL is a reproducible area Area1 from which particulates deposited on the particulate filter 10 can be removed, and the lower area is non-reproducible that accumulates on the filter body without removing particulates. This is the area Area2.
- the filter regeneration control it is determined whether or not the particulates collected by the particulate filter 10 are accumulated in a certain amount or more in the particulate filter 10, and the load pattern LP
- the filter regeneration control is performed in the non-reproducible area Area2.
- the regeneration means 30 is operated to raise the exhaust gas temperature, and the particulate filter 10 is regenerated by burning and removing the particulates deposited on the particulate filter 10.
- the second set temperature T2 as the predetermined release temperature is configured to be lower than the first set temperature T1 as the predetermined regulation temperature.
- step S110 it is first determined whether or not the low rotation / low load prohibition mode is set. If it is not in the low rotation / low load prohibition mode, it is determined whether the exhaust temperature T of the particulate filter 10 detected by the temperature sensor 20c is equal to or higher than a third set temperature T3 that is a predetermined regulation temperature (step S120). If the exhaust temperature T is lower than the third set temperature T3, it is determined that there is no danger of excessive temperature rise, and the low rotation and low load prohibition control is terminated.
- step S130 If the exhaust temperature T is equal to or higher than the third set temperature T3, it is determined whether or not the time during which the exhaust temperature T is equal to or higher than the third set temperature T3 is equal to or longer than t1 (step S130). If it is shorter than t1, it is determined that there is no danger of excessive temperature rise, and the low rotation and low load prohibition control is terminated. If it is t1 or more, it is determined that there is a risk of excessive temperature rise, the low rotation / low load prohibition mode is started (step S140), and the notification means 40 is started. Specifically, the control lamp which is the visual notification means 42 is turned on (step S150). The third set temperature T3 is lower than the first set temperature T1.
- step S160 it is determined whether or not the exhaust gas temperature T continues to decrease for a predetermined time t2 or more. If the exhaust temperature T continues to decrease for a certain time t2 or more, it is determined that there is no danger of excessive temperature rise, the low rotation / low load prohibition mode is canceled (step S170), and the notification means 40 is stopped. . Specifically, the control lamp which is the visual notification means 42 is turned off (step S180). If the exhaust temperature T does not continue to decrease for a certain period of time t2 or more, it is determined that there is a high possibility of re-heating, and that there is a continued risk of excessive temperature rise. To finish the low-rotation low-load prohibition control.
- step S210 it is determined whether or not the low rotation / low load prohibition mode is set. If it is not in the low rotation / low load prohibition mode, it is determined whether the exhaust temperature T of the particulate filter 10 detected by the temperature sensor 20c is equal to or higher than the third set temperature T3 (step S220). If the exhaust temperature T is equal to or lower than the third set temperature T3, it is determined that there is no danger of excessive temperature rise, the integrated value P is reset (step S222), and the low rotation / low load prohibition control is terminated. If the exhaust temperature T is equal to or higher than the third set temperature T3, the temperature time integration calculation is performed and the integration value P is updated (step S221).
- the exhaust gas temperature T which is the temperature of the particulate filter 10
- the control start temperature Tst which is the temperature at which control for preventing the exhaust temperature T from entering the low rotation / low load rotation area Area3 is started.
- step S310 it is first determined whether or not the low-rotation / low-load prohibition mode is set. If not in the low rotation / low load prohibit mode, it is determined whether the exhaust temperature T of the particulate filter 10 detected by the temperature sensor 20c is equal to or higher than the third set temperature T3 (step S320). If the exhaust temperature T is equal to or lower than the third set temperature T3, the integrated value P is reset (step S321), the maximum temperature Tmax is reset (step S322), and the process ends. If the exhaust temperature T is equal to or higher than the third set temperature T3, it is next determined whether or not the exhaust temperature T is equal to or higher than the maximum temperature Tmax (step S330).
- step S340 it is determined whether or not the integrated value P is greater than or equal to a predetermined value P1 (step S340). If the integrated value P is smaller than the predetermined value P1, it is determined that there is no danger of excessive temperature rise, and the control is terminated. If the integrated value P is equal to or greater than the predetermined value P1, it is determined that there is a risk of excessive temperature rise, the low rotation / low load prohibition mode is started (step S350), and the notification means 40 is started. Specifically, the control lamp which is the visual notification means 42 is turned on (step S360).
- step S370 If it is in the low rotation / low load prohibition mode, it is determined whether or not the exhaust temperature T has fallen by a predetermined temperature T5 or more from the maximum temperature Tmax (step S370). If the exhaust temperature T has dropped from the maximum temperature Tmax by a predetermined temperature T5 or more, it is determined that there is no danger of excessive temperature rise, the low rotation / low load prohibition mode is canceled (step S380), and the notification means 40 is stopped. Let Specifically, the control lamp which is the visual notification means 42 is turned off (step S390). If the exhaust temperature T is not lower than the maximum temperature Tmax by a predetermined temperature T5 or more, it is determined that there is a continuing risk of excessive temperature rise, and the low rotation and low load prohibition mode is continued to reduce the low rotation speed. End the load prohibition control.
- the present invention can be used for a diesel engine having a particulate filter and a purification device having a regeneration means for forcibly regenerating the particulate accumulated in the particulate filter.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Geometry (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
図1は本発明に係るディーゼルエンジン用排気浄化装置の構成を示す概略図、図2はエンジン負荷とエンジン回転数との関係を示す説明図、図3は低回転低負荷禁止制御の流れを示すフローチャート図、図4は低回転低負荷禁止制御の流れを示すフローチャート図、図5は低回転低負荷禁止制御の流れを示すフローチャート図、図6は低回転低負荷禁止制御の流れを示すフローチャート図である。
図1に示すように、ディーゼルエンジン用排気浄化装置1は、本発明におけるディーゼルエンジンの実施の一形態であるディーゼルエンジン2に具備される。ディーゼルエンジン用排気浄化装置1は、ディーゼルエンジン2で発生した排気ガスを浄化し、排出するものである。
ディーゼルエンジン用排気浄化装置1は、パティキュレートフィルタ10、検出手段20、コントローラ21、再生手段30、通知手段40等を具備する。
前記コントローラ21は、検出手段20により検出されたパティキュレートフィルタ10の圧力等からパティキュレートフィルタ10の詰まり状態を演算し、パティキュレートフィルタ10に堆積したパティキュレートの除去が必要か否か判定する。
図2に示す説明図は、ディーゼルエンジン2の駆動時おけるエンジン回転数Rとエンジン負荷Lとの関係を表した負荷パターンの図であり、記憶部22に記憶されている。図2では、エンジン回転数を横軸にとり、ラック位置と相関関係にあるエンジン負荷を縦軸にとっている。この場合、基準負荷値LsはL=Lsの水平な直線で表されている。
[実施形態1]
また、低回転低負荷域Area3に入ることを禁じる制御を解除することで速やかに低回転低負荷域Area3での運転を行えるようにして無駄な燃料の消費を防ぐことができる。また運転範囲を速やかに回復することで運転への影響を少なくする。
[実施形態2]
また、低回転低負荷域Area3に入ることを禁じる制御を解除することで速やかに低回転低負荷域Area3での運転を行えるようにして無駄な燃料の消費を防ぐことができる。また、所定の温度まで下がらなくても、パティキュレートフィルタ10の温度である排気温度Tが一定時間t2下がり続けた場合には運転範囲を速やかに回復することで運転への影響を少なくする。
[実施形態3]
また、低回転低負荷域Area3に入ることを禁じる制御を解除することで速やかに低回転低負荷域Area3での運転を行えるようにして無駄な燃料の消費を防ぐことができる。また、所定の温度まで下がらなくても、パティキュレートフィルタ10の温度である排気温度Tが低回転低負荷回転域Area3に入るのを禁じる制御を開始した時の温度である制御開始温度Tstから予め定められた温度だけ低くなった場合には運転範囲を速やかに回復することで運転への影響を少なくする。
[実施形態4]
また、低回転低負荷域Area3に入ることを禁じる制御を解除することで速やかに低回転低負荷域Area3での運転を行えるようにして無駄な燃料の消費を防ぐことができる。また、所定の温度まで下がらなくても、前記排気温度Tがパティキュレートフィルタ10の最高温度Tmaxから予め定められた温度幅以上に下がった場合には運転範囲を速やかに回復することで運転への影響を少なくする。
Claims (7)
- パティキュレートフィルタと、該パティキュレートフィルタに溜まったパティキュレートを強制的に除去し、前記パティキュレートフィルタを再生する再生手段を有するディーゼルエンジン用排気浄化装置とを有するディーゼルエンジンにおいて、パティキュレートフィルタの温度が所定規制温度以上でありさらにパティキュレートが所定量以上溜まっているときに負荷回転が変動しても予め決められた低回転低負荷域に入ることを禁じるとともに、禁じられていることをオペレータに通知する通知手段を具備することを特徴とするディーゼルエンジン。
- 前記パティキュレートフィルタの温度が所定規制温度以上になるだけでなく一定時間以上連続して所定規制温度以上にあった場合にのみ負荷回転が変動しても予め決められた低回転低負荷域に入ることを禁じることを特徴とする請求項1に記載のディーゼルエンジン。
- 前記パティキュレートフィルタの温度が所定規制温度以上になるだけでなく一定時間での温度積分値が所定値を超えた場合にのみ負荷回転が変動しても予め決められた低回転低負荷域に入ることを禁じることを特徴とする請求項1に記載のディーゼルエンジン。
- 前記パティキュレートフィルタの温度が所定解除温度以下に下がった場合低回転低負荷域に入ることを禁じる制御を解除することを特徴とする請求項1に記載のディーゼルエンジン。
- 前記パティキュレートフィルタの温度が一定時間下がり続けた場合低回転低負荷域に入ることを禁じる制御を解除することを特徴とする請求項2に記載のディーゼルエンジン。
- 前記パティキュレートフィルタの温度が達した最高温度から予め定められた温度幅以上に下がった場合低回転低負荷域に入ることを禁じる制御を解除することを特徴とする請求項3に記載のディーゼルエンジン。
- 前記パティキュレートフィルタの温度が低回転低負荷回転域に入るのを禁じる制御を開始した時の温度から予め定められた温度だけ低くなった場合低回転低負荷域に入ることを禁じる制御を解除することを特徴とする請求項3に記載のディーゼルエンジン。
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CN2009801337452A CN102137989B (zh) | 2008-09-03 | 2009-06-05 | 柴油发动机 |
EP09811342.6A EP2320040B1 (en) | 2008-09-03 | 2009-06-05 | Diesel engine |
US13/061,861 US8646256B2 (en) | 2008-09-03 | 2009-06-05 | Diesel engine |
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JP2008226300A JP5270265B2 (ja) | 2008-09-03 | 2008-09-03 | ディーゼルエンジン |
JP2008-226300 | 2008-09-03 |
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PCT/JP2009/060363 WO2010026813A1 (ja) | 2008-09-03 | 2009-06-05 | ディーゼルエンジン |
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US (1) | US8646256B2 (ja) |
EP (1) | EP2320040B1 (ja) |
JP (1) | JP5270265B2 (ja) |
KR (1) | KR101562917B1 (ja) |
CN (1) | CN102137989B (ja) |
WO (1) | WO2010026813A1 (ja) |
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JP5533260B2 (ja) * | 2010-05-25 | 2014-06-25 | いすゞ自動車株式会社 | Dpfシステム |
US8822887B2 (en) | 2010-10-27 | 2014-09-02 | Shaw Arrow Development, LLC | Multi-mode heater for a diesel emission fluid tank |
US9458782B2 (en) * | 2014-04-08 | 2016-10-04 | Komatsu America Corp. | Selective catalyst reduction heat management method and system |
USD729141S1 (en) | 2014-05-28 | 2015-05-12 | Shaw Development LLC | Diesel emissions fluid tank |
USD729722S1 (en) | 2014-05-28 | 2015-05-19 | Shaw Development LLC | Diesel emissions fluid tank floor |
DE102017115599A1 (de) * | 2017-07-12 | 2019-01-17 | Man Truck & Bus Ag | Brennkraftmaschine, insbesondere als Antriebsmotor für ein Fahrzeug |
CN108757188B (zh) * | 2018-05-07 | 2019-03-19 | 中国舰船研究设计中心 | 船舶推进柴油机双重负荷的保护方法 |
EP4134536A4 (en) * | 2020-04-08 | 2023-02-22 | NISSAN MOTOR Co., Ltd. | VEHICLE CONTROL METHOD AND VEHICLE CONTROL DEVICE |
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JP2004044524A (ja) * | 2002-07-15 | 2004-02-12 | Mazda Motor Corp | エンジンの排気微粒子処理装置及びそのコンピュータ・プログラム |
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US6843340B2 (en) * | 2001-07-20 | 2005-01-18 | Finn Corporation | Hydraulic apparatus for vehicles |
JP2003278575A (ja) * | 2002-03-25 | 2003-10-02 | Nissan Diesel Motor Co Ltd | 車両のエンジン制御装置 |
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- 2008-09-03 JP JP2008226300A patent/JP5270265B2/ja not_active Expired - Fee Related
-
2009
- 2009-06-05 EP EP09811342.6A patent/EP2320040B1/en not_active Not-in-force
- 2009-06-05 CN CN2009801337452A patent/CN102137989B/zh not_active Expired - Fee Related
- 2009-06-05 US US13/061,861 patent/US8646256B2/en active Active
- 2009-06-05 KR KR1020117005568A patent/KR101562917B1/ko not_active IP Right Cessation
- 2009-06-05 WO PCT/JP2009/060363 patent/WO2010026813A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
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EP2320040B1 (en) | 2016-09-14 |
CN102137989A (zh) | 2011-07-27 |
JP2010059861A (ja) | 2010-03-18 |
CN102137989B (zh) | 2013-07-24 |
US20110265462A1 (en) | 2011-11-03 |
KR101562917B1 (ko) | 2015-10-23 |
EP2320040A4 (en) | 2015-08-19 |
JP5270265B2 (ja) | 2013-08-21 |
EP2320040A1 (en) | 2011-05-11 |
US8646256B2 (en) | 2014-02-11 |
KR20110058803A (ko) | 2011-06-01 |
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