CN107269405A - The control method of the control device of denitrification apparatus, denitrification apparatus and denitrification apparatus - Google Patents
The control method of the control device of denitrification apparatus, denitrification apparatus and denitrification apparatus Download PDFInfo
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- CN107269405A CN107269405A CN201710308944.9A CN201710308944A CN107269405A CN 107269405 A CN107269405 A CN 107269405A CN 201710308944 A CN201710308944 A CN 201710308944A CN 107269405 A CN107269405 A CN 107269405A
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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
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
- F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
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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
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
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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
- F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
-
- 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
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
-
- 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
- F02D2200/0406—Intake manifold pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/34—Control of exhaust back pressure, e.g. for turbocharged engines
-
- 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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- 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
-
- 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
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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)
- Exhaust-Gas Circulating Devices (AREA)
- Supercharger (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Denitrification apparatus (10) possesses：Exhaust gas turbine (18), is driven in rotation by the waste gas that diesel engine (12) is discharged；Compressor (20), by the rotation driving of exhaust gas turbine (18) by the air attracted from suction inlet and EGR gas compressions, and sends out to diesel engine (12)；Gas is returned with housing (24), suction inlet will be oriented to after air and EGR gas mixings；Muffler (26), is connected with returning to gas with housing (24), and directs the air to return to gas housing (24)；And EGR pressure fan (16), a part for waste gas is sent out as EGR gases to gas is returned with housing (24).Moreover, denitrification apparatus control device (40) determines the pressure for the gas for being directed to compressor (20), and the rotating speed of EGR pressure fan (16) is controlled, so that pressure measurements subatmospheric.Thus, prevent from being sent to the waste gas of diesel engine (12) to system outward leakage.
Description
The application is the divisional application of following patent applications：
Application number：201480010580.0
The applying date：On August 26th, 2015
Denomination of invention：The control method of the control device of denitrification apparatus, denitrification apparatus and denitrification apparatus
Technical field
The present invention relates to the control method of a kind of control device of denitrification apparatus, denitrification apparatus and denitrification apparatus.
Background technology
Generally, the harmful substances such as NOx, SOx and coal dust are contained in the waste gas of the internal combustion engine such as diesel engine or environment is caused
The material of load.It is therefore proposed that there is the various methods for not discharging this harmful substance.
There is the waste gas that can reduce NOx to recycle (Exhaust Gas as the exemplary process for reducing harmful substance
RecircuLation：EGR) method.This be the waste gas that will be produced by burning a part be mixed into after combustion air carry out
Burning, and by way of reducing ignition temperature and realizing NOx reduction.
The device for recycling the waste gas of diesel engine of vehicle and being cooled down is recorded in patent document 1.Patent text
Offering the device described in 1 has by the powered compressor of exhaust gas turbine, the downstream of exhaust gas turbine and the upstream of booster
Side is connected by waste gas recirculation line.
Conventional art document
Patent document
Patent document 1：Japanese Unexamined Patent Application Publication 2009-511797 publications
The summary of invention
The invention technical task to be solved
In engine described in patent document 1, waste gas recirculation line connects in the suction line of the front of compressor and air
Connect, waste gas and air are mixed in suction line and are supplied to compressor afterwards.Here, the large-scale hair possessed in ship
In motivation compressor, the suction line without the air described in patent document 1, and being provided with front of compressor makes waste gas
The mixed organization of compressor is oriented to after being mixed with air.Moreover, in big-block engine booster, using in patent document 1
Pressure fan not available for the engine of record, mixed organization is supplied to by waste gas.
Therefore, in big-block engine booster, if the pressure of waste gas is higher, waste gas is possible to be connected from mixed organization
The suction inlet of air discharged to outside system.
The present invention makes in light of this situation, and its object is to provide a kind of to prevent from that the waste gas of internal combustion engine should be sent to
To the control method of the control device, denitrification apparatus and denitrification apparatus of the denitrification apparatus of system outward leakage.
Means for solving technical task
In order to solve the above problems, the control of the control device of denitrification apparatus of the invention, denitrification apparatus and denitrification apparatus
Method is adopted with the following method.
The control device of denitrification apparatus involved by the first embodiment of the present invention, the denitrification apparatus possesses：Waste gas
Turbine, is driven in rotation by the waste gas that internal combustion engine is discharged；Compressor, will be from by the rotation driving of the exhaust gas turbine
The part compression of air and the waste gas that suction inlet attracts, and sent out to the internal combustion engine；Mixed organization, by the air
The suction inlet is oriented to after waste gas mixing；Air introducing mechanism, is connected with the mixed organization, and by the air
It is oriented to the mixed organization；And pressure fan, the waste gas is sent out to the mixed organization, the control device of the denitrification apparatus
Possess：Piezometry mechanism, determines the pressure for the gas for being oriented to the compressor；And rotation speed control mechanism, control the air-supply
The rotating speed of machine, so that the pressure measurements subatmospheric that the piezometry mechanism is determined.
According to the present invention, denitrification apparatus possesses：Exhaust gas turbine, is driven in rotation by the waste gas that internal combustion engine is discharged；And
Compressor, by the rotation driving of exhaust gas turbine, the air and waste gas attracted from suction inlet is compressed, and is sent out to internal combustion engine.
That is, booster is formed by exhaust gas turbine and compressor.Also, suction is oriented to after compressor is connected with and mixes air and waste gas
The mixed organization of mouth and the air introducing mechanism for directing the air to mixed organization.Also, denitrification apparatus possesses waste gas to mixing
The pressure fan that mechanism is sent out.
Here, if the pressure for being sent to the waste gas of compressor is higher, waste gas is likely to from air introducing mechanism to outside system
Leakage.
Therefore, the control device of denitrification apparatus determines the pressure for the gas for being oriented to compressor by piezometry mechanism.In addition, by
The gas that piezometry mechanism is determined is the mixed gas of waste gas, air or waste gas and air.
Moreover, the rotating speed of the pressure fan is controlled by rotation speed control mechanism, so that the pressure that piezometry mechanism is determined is surveyed
Definite value subatmospheric.By the pressure measurements subatmospheric for being determined piezometry mechanism, the useless of compressor is sent to
The pressure of gas turns into negative pressure relative to atmospheric pressure.Turn into negative pressure relative to atmospheric pressure if being sent to the pressure of the waste gas of compressor,
Waste gas will not be from air introducing mechanism to system outward leakage.
As described above, said structure can prevent from being sent to the waste gas of internal combustion engine to system outward leakage.
In the above-described first embodiment, the rotation speed control mechanism controls the rotating speed of the pressure fan, so that the pressure
Power measured value turn into in the rotating speed of scavenging pressure, the rotating speed of the compressor, the load of the internal combustion engine and the internal combustion engine
Any corresponding higher limit below.
According to said structure, it can prevent from being sent to the waste gas of internal combustion engine to system outward leakage, and can be by the waste gas
It is set to the appropriate amount corresponding with the action of internal combustion engine.
In the above-described first embodiment, the denitrification apparatus is arranged on ship, and the higher limit has and the ship
The corresponding scope of the load change of the foreseeable internal combustion engine in operation.
According to said structure, it can be more reliably prevented from being sent to the waste gas of internal combustion engine to system outward leakage.
In the above-described first embodiment, the rotation speed control mechanism is to according to the oxygen concentration for being supplied to the internal combustion engine
The rotating speed of the pressure fan calculated is maked corrections, so that the pressure measurements subatmospheric.
According to said structure, the rotating speed of pressure fan is controlled on the basis of the oxygen concentration for being supplied to internal combustion engine, because
This, can suppress the hydraulic performance decline of internal combustion engine, and can prevent from being sent to the waste gas of internal combustion engine to system outward leakage.
Denitrification apparatus involved by second embodiment of the present invention, it possesses：Exhaust gas turbine, is discharged by internal combustion engine
Waste gas and be driven in rotation；Compressor, by the rotation driving of the exhaust gas turbine, by the air attracted from suction inlet and described
The part compression of waste gas, and sent out to the internal combustion engine；Mixed organization, institute is oriented to after the air and the waste gas are mixed
State suction inlet；Air introducing mechanism, is connected with the mixed organization, and the air is oriented into the mixed organization；Air-supply
Machine, the waste gas is sent out to the mixed organization；And control device, it has the pressure for determining the gas for being oriented to the compressor
The piezometry mechanism of power and the rotating speed of the control pressure fan, so that the piezometry that the piezometry mechanism is determined
It is worth subatmospheric rotation speed control mechanism.
The control method of denitrification apparatus involved by third embodiment of the present invention, the denitrification apparatus possesses：Waste gas
Turbine, is driven in rotation by the waste gas that internal combustion engine is discharged；Compressor, will be from by the rotation driving of the exhaust gas turbine
Air and waste gas compression that suction inlet attracts, and sent out to the internal combustion engine；Mixed organization, by the air and described useless
The suction inlet is oriented to after gas mixing；Air introducing mechanism, is connected with the mixed organization, and air guiding is described
Mixed organization；And pressure fan, the waste gas is sent out to the mixed organization, the control method of the denitrification apparatus possesses：The
One process, the pressure for the gas for being oriented to the compressor is determined by piezometry mechanism；And second process, control the air-supply
The rotating speed of machine, so that the pressure measurements subatmospheric that the piezometry mechanism is determined.
Invention effect
According to the present invention, with following excellent effect：The waste gas of internal combustion engine can be prevented from being sent to system outward leakage.
Brief description of the drawings
Fig. 1 is the summary construction diagram of the denitrification apparatus involved by embodiments of the present invention.
Fig. 2 is the structure chart of the booster involved by embodiments of the present invention.
Fig. 3 is the functional block diagram of the pressure fan rotation speed control section involved by embodiments of the present invention.
Embodiment
Hereinafter, refer to the attached drawing is to the control device, denitrification apparatus and denitrification apparatus of denitrification apparatus involved in the present invention
A kind of embodiment of control method is illustrated.
Fig. 1 is the summary construction diagram of the denitrification apparatus 10 involved by present embodiment.
Denitrification apparatus 10 involved by present embodiment is denitrification apparatus peculiar to vessel as one, and it is arranged on internal combustion engine (this implementation
It is diesel engine 12 in mode).
As shown in figure 1, denitrification apparatus 10 possesses booster 14 and EGR pressure fan 16.
Booster 14 possesses exhaust gas turbine 18 and compressor 20.
Exhaust gas turbine 18 by the waste gas that diesel engine 12 is discharged by being driven in rotation.
Compressor 20 by by the rotation driving of exhaust gas turbine 18 from suction inlet attract air and waste gas a part
(hereinafter referred to as " EGR gases ") is compressed and sent out to diesel engine 12.In addition, compressor 20 is arranged on the another of rotary shaft 22
One end, and one end of rotary shaft 22 is provided with exhaust gas turbine 18.Also, compressor 20 is connected with：Air and EGR gases are mixed
The mixed organization that the suction inlet of compressor 20 is oriented to after conjunction is to return to gas housing 24 (can also refer to Fig. 2)；Direct the air to
It is muffler 26 (can also refer to Fig. 2) with the air guide mechanism of housing 24 to return to gas.
In addition, the air and the mixed gas of EGR gases sent out from compressor 20 are supplied to after being cooled down by aerial cooler 28
Diesel engine 12.
The waste gas circulated in exhaust gas turbine 18 circulates via recirculation line 30 to compressor 20.In addition, in this embodiment party
In formula, the waste gas circulated in recirculation line 30 is a part for the waste gas circulated in exhaust gas turbine 18, hereinafter referred to as " EGR
Gas ".The waste gas not circulated in recirculation line 30 is discharged from chimney to outside system.
Recirculation line 30 possesses successively from upstream side：EGR valve 32, EGR washers 34, EGR pressure fan 16.
EGR valve 32 adjusts the flow of the EGR gases circulated to recirculation line 30.
EGR washers 34 possess water treatment facilities 35, and the coal contained in EGR gases is removed by water cleaning EG R gases
Deng.
EGR pressure fan 16 sends out EGR gases to compressor 20.
Also, the denitrification apparatus 10 involved by present embodiment possesses the pressure for determining the gas for being oriented to compressor 20
Pressure sensor 38.In addition, mixing of the gas determined by pressure sensor 38 for EGR gases, air or waste gas and air
Gas.
Control of the denitrification apparatus 10 by denitrification apparatus control device 40.Denitrification apparatus control device 40 possesses pressure fan rotating speed
Control unit 42 is to control the rotating speed of EGR pressure fan 16, so that the pressure measurements determined by pressure sensor 38 are less than air
Pressure.
Fig. 2 is the structure chart of booster 14.
Exhaust gas turbine 18 has：Turbine shroud 50, by the turbine disc 52 that is rotated from the waste gas that diesel engine 12 is supplied,
It is arranged on the turbo blade 54 in the circumference of worm gear disk 52.
Turbine shroud 50 is set in the way of covering turbine disc 52 and turbo blade 54.Turbine shroud 50 has：Waste gas is from bavin
Turbine shroud entrance 50a that the waste gas concetrated pipe (not shown) of oil machine 12 is directed, by the waste gas of diesel engine 12 to turbine
Exhaust steam passage 50b that blade 54 is guided, the turbine shroud guided by the waste gas of turbo blade 54 to outside exhaust gas turbine 18 gone out
Mouth 50c.
The shape in disk form of turbine disc 52, is circumferentially provided with multiple turbines extended from pivot to radial outside
Blade 54.Turbo blade 54 is capped in the way of its radial outside is surrounded by turbine shroud 50.Waste gas is from exhaust steam passage 50b quilts
Guided turbine blade 54.Rotated using the exhaust gas-driven turbine disk 52 and rotary shaft 22 that are guided to turbo blade 54.Drive whirlpool
The waste gas that wheel disk 52 and rotary shaft 22 rotate exports 50c outflows from turbo blade 54 to turbine shroud.
Compressor 20 has：Compressor housing 56, by being driven in rotation and the impeller 58 of compressed air.
Compressor housing 56 is set in the way of covering impeller 58.Compressor housing 56 has：Via muffler 26 and return gas
Body housing 24 and be taken into the suction inlet i.e. compressor housing entrance 56a from outside air and EGR gases, pressed by impeller 58
Vortex chamber 56b that air after contracting is directed, impeller 58 is compressed after air discharge compressor housing outlet 56c.
Impeller 58 is provided with multiple blades extended from center to radial outside in substantially disc-shape in surface thereof
(not shown).Impeller 58 is capped in the way of its radial outside is surrounded by turbine room 56b.Inhaled from compressor housing entrance 56a
The air and EGR gases entered is directed to impeller 58.Impeller 58 is driven by the rotation for the exhaust gas turbine 18 being arranged in rotary shaft 22
Move and be driven in rotation.By the impeller 58 being driven in rotation, the air and EGR gases sucked from compressor housing entrance 56a
Compressed, the air and EGR gases after compression are sent out to the radial outside of impeller 58.The air and EGR compressed by impeller 58
Gas is exported by vortex chamber 56b from compressor housing outlet 56c.
Compressor housing 56 is set by clamping return gas between muffler 26 at it in the way of housing 24.Return to gas
Body offers introducing port 24a with housing 24 in the part of its outer wall, is connected with introducing port 24a to the waste gas of diesel engine 12
A part is that the EGR that EGR gases are guided returns to pipe arrangement (not shown).Gas is returned to be internally provided with greatly at it with housing 24
Cause cylindric hydrid component 62.
Hydrid component 62 is in substantially cylindrical shape, and its diameter is roughly the same with compressor housing entrance 56a diameter.Mixing unit
The axial one end of part 62 is connected with compressor housing entrance 56a, and the other end is connected with muffler 26, thus, in mixing
The inside of part 62, the air imported from muffler 26 passes through to compressor housing entrance 56a.Hydrid component 62 is by side wall
On be provided with the porous plate in multiple holes 64 and be formed as cylindric part.For example distinguish in the multiple holes 64 for being arranged on hydrid component 62
In circular shape.
Running through in bearing block 66 has one end to the rotation that the side of exhaust gas turbine 18 is prominent and the other end is prominent to the side of compressor 20
Axle 22.Also, it is connected with turbine shroud 50 and compressor housing 56 in bearing block 66.These turbine shrouds 50, bearing block 66, pressure
Contracting casing body 56 is linked integral by the fastening (not shown) of multiple bolts.
Bearing block 66 is provided with the bearing of journals (not shown) and thrust bearing (not shown).These bearings of journals are arranged on
The vicinity of the side of exhaust gas turbine 18 and the vicinity of the side of compressor 20.By these bearings of journals, rotary shaft 22 can be pivoted, and
Supported by bearing block 66.
In addition, passing through the both sides for the thrust ring (not shown) being provided projectingly in the radial direction periphery towards rotary shaft 22
The thrust bearing of configuration, can limit waste gas and act on wormwheel blade 54 and make rotary shaft 22 to axial movement, and can be around
Rotary shaft 22 rotates.
Then, 2 pairs of reference picture is supplied to the flowing of the EGR gases and air of booster 14 and illustrated.
Waste gas is guided from the waste gas concetrated pipe of diesel engine 12 to the turbine shroud entrance 50a of turbine shroud 50.It imported into turbine case
Body entrance 50a waste gas is directed to turbo blade 54 via exhaust steam passage 50b.By importeding into the waste gas of turbo blade 54,
Turbine disc 52 and rotary shaft 22 are driven in rotation.The waste gas that turbine disc 52 and rotary shaft 22 rotate is driven from turbo blade 54
To turbine shroud outlet 50c outflows.
Impeller 58, therefore rotation are provided with the end opposite side end with being provided with turbine disc 52 of rotary shaft 22
Axle 22 is by waste gas rotation driving, the thus rotation driving of impeller 58.By the rotation driving of impeller 58, air is outside muffler 26
It is attracted in week in muffler 26.Also, a part for the waste gas of diesel engine 12 is as EGR gases from being arranged on the He of muffler 26
Return gas between compressor housing 56 is imported into return gas housing 24 with the introducing port 24a of housing 24.
By the rotation driving of impeller 58, attract the air come to be directed to via muffler 26 and be arranged at return gas use
The inside of the substantially cylindric hydrid component 62 of the inside of housing 24.Also, from the introducing port 24a for returning to gas housing 24
It imported into the EGR gases returned in gas housing 24 and is directed to hydrid component 62 from the multiple holes 64 for being arranged on hydrid component 62
Inside.Thereby, it is possible to make EGR gases be uniformly mixed in by the air inside hydrid component 62.
In this way, hydrid component 62 inner homogeneous the air that mixes and EGR gases as mixed gas from compression
Machine housing inlet port 56a is attracted to the inside of compressor housing 56.The mixed gas for being attracted to the inside of compressor housing 56 is led to
Cross the impeller 58 of rotation driving and compressed.The mixed gas compressed by impeller 58 is via volute chamber 56b from compressor housing
Export 56c discharges.
In this way, being supplied to diesel engine 12 in the mixed gas that booster 14 is compressed.Thus, it is fed with leading in diesel engine 12
Cross booster 14 and mixed gas that air and EGR gases are prepared by fully mixing.
Here, pressure sensor 38 involved by present embodiment is used as air intake for being arranged on muffler 26
Near end face.By the way that pressure sensor 38 is arranged near the end face for the muffler 26 that waste gas may be revealed, with pressure is passed
The situation that sensor 38 is arranged on other positions is compared, and the response of the control based on pressure fan rotation speed control section 42 is more preferably (in detail
Content is aftermentioned).In addition, being not limited solely to this, the EGR gases that pressure sensor 38 can also be arranged on return gas housing 24 enter
The peripheral part (pressure sensor 38_B) of (pressure sensor 38_A) or return gas housing 24 near the end face of mouth.
Then, the control based on pressure fan rotation speed control section 42 is described in detail.
The rotating speed of the control EGR of pressure fan rotation speed control section 42 pressure fan 16, so that the piezometry that pressure sensor 38 is determined
It is worth (hereinafter referred to as " compressor suction pressure Psuc") subatmospheric.Pressure fan rotation speed control section 42 makes compressor suction pressure
PsucLess than atmospheric pressure, thus, the exhaust gas pressure sent out to compressor 20 turns into negative pressure relative to atmospheric pressure.If to compressor 20
The exhaust gas pressure of submitting turns into negative pressure relative to atmospheric pressure, then waste gas will not be from muffler 26 to system outward leakage.
Pressure fan rotation speed control section 42 is for example by CPU (Central Processing Unit), RAM (Random
Access Memory), the recording medium of embodied on computer readable etc. constitutes.Also, a succession of processing for realizing various functions
As one to be stored in the form of program in recording medium, and the program is read into RAM etc. by CPU, execution information
Processing, calculation process, so as to realize various functions.
Fig. 3 is the functional block diagram of pressure fan rotation speed control section 42.In addition, in the present embodiment, the aperture of EGR valve 32
It is set to constant (for example, standard-sized sheet).
42 pairs of bases of pressure fan rotation speed control section involved by present embodiment are supplied to the oxygen densitometer of diesel engine 12
The rotating speed of the EGR pressure fan 16 calculated is maked corrections, so that compressor suction pressure PsucSubatmospheric.
Thus, the turning to EGR pressure fan 16 on the basis of being supplied to the oxygen concentration of diesel engine 12 of pressure fan rotation speed control section 42
Speed is controlled, therefore, it is possible to suppress the hydraulic performance decline of diesel engine 12, and can prevent from being sent to the EGR gas of diesel engine 12
Body is to system outward leakage.
Also, the rotating speed of the control EGR of pressure fan rotation speed control section 42 pressure fan 16 involved by present embodiment, so that pressure
Contracting machine suction pressure PsucAs with scavenging pressure PsOr supercharger speed NtBelow corresponding higher limit.In addition, booster turns
Fast NtThe as rotating speed of compressor 20.
Thus, pressure fan rotation speed control section 42 can prevent from being sent to the EGR gases of diesel engine 12 to system outward leakage, and energy
EGR gases are enough made to turn into the appropriate amount corresponding with the action of diesel engine 12.
First, target O2Concentration calculating part 70 is calculated according to the load (hereinafter referred to as " engine load ") of diesel engine 12
Go out the O supplied to diesel engine 122Desired value (hereinafter referred to as " the target O of concentration2Concentration "), and by target O2Concentration, which is output to, to be subtracted
Method operational part 72A.In addition, target O2Concentration calculating part 70 possesses expression engine load and target O as one2Between concentration
Relation map functions, and target O is calculated according to the map functions2Concentration.
Subtraction unit 72A calculates the O of present situation2Concentration and target O2Difference (the O of present situation of concentration2Concentration-target O2It is dense
Degree), and the difference is exported give frequency correction amount calculating part 74A.
As shown in formula (1), frequency correction amount calculating part 74A is multiplied by conversion coefficient α to above-mentioned difference and calculates expression EGR air-supplies
The correction amount of the frequency of the rotating speed of machine 16 is frequency correction amount A, and frequency correction amount A is exported to comparing section 76.Conversion coefficient α
For on the occasion of.
The frequency correction amount A=α × (O of present situation2Concentration-target O2Concentration) ... (1)
Higher limit calculating part 78A is according to scavenging pressure PsCalculate compressor suction pressure PsucHigher limit (it is following, claim
Make " suction pressure higher limit PA"), and by suction pressure higher limit PAExport and give subtraction unit 72B1.Higher limit calculating part 78A
Possesses expression scavenging pressure P as onesWith compressor suction pressure PsucBetween relation map functions, and according to the map
Function calculates suction pressure higher limit PA。
Higher limit calculating part 78B is according to supercharger speed NtCalculate compressor suction pressure PsucHigher limit (hereinafter referred to as
" suction pressure higher limit PB"), and by suction pressure higher limit PBExport and give subtraction unit 72B2.Higher limit calculating part 78B makees
Possesses expression supercharger speed N for onetWith compressor suction pressure PsucBetween relation map functions, and according to the map
Function calculates suction pressure higher limit PB。
Suction pressure higher limit PAWith suction pressure higher limit PBFor for making compressor suction pressure PsucIt is upper less than atmospheric pressure
Limit value.
Also, suction pressure higher limit PAWith suction pressure higher limit PBWith the diesel oil with can appreciate that in vessel motion
The corresponding scope of the load change of machine 12.
The load for the diesel engine 12 that ship possesses drastically changes with meteorological condition etc. sometimes.By pressing suction
Power higher limit PAWith suction pressure higher limit PBWith scope, the load even in diesel engine 12 is sharply increased, and exhaust gas pressure
In the case of rising therewith, pressure fan rotation speed control section 42 also can reliably prevent from being sent to the waste gas of diesel engine 12 to system
Outward leakage.
Also, because the suction pressure of compressor 20 relative to atmospheric pressure should turn into negative pressure, therefore compressor suction pressure
Psuc, suction pressure higher limit PAAnd suction pressure higher limit PBIt is set to negative value.
Subtraction unit 72B1 calculates suction pressure higher limit PAWith compressor suction pressure PsucBetween difference (inhale
Enter upper pressure limit value PA- compressor suction pressure Psuc), and the difference is exported give frequency correction amount calculating part 74B1.
As shown in formula (2), frequency correction amount calculating part 74B1, which is multiplied by conversion coefficient β 1 to above-mentioned difference and calculates EGR, to be sent
The frequency correction amount B1 of blower fan 16, and frequency correction amount B1 is exported to comparing section 80.Conversion coefficient β 1 be on the occasion of.
Frequency correction amount B1=β 1 × (suction pressure higher limit PA- compressor suction pressure Psuc)…(2)。
Subtraction unit 72B2 calculates suction pressure higher limit PBWith compressor suction pressure PsucBetween difference (inhale
Enter upper pressure limit value PB- compressor suction pressure Psuc), and the difference is exported give frequency correction amount calculating part 74B2.
As shown in formula (3), frequency correction amount calculating part 74B2, which is multiplied by conversion coefficient β 2 to above-mentioned difference and calculates EGR, to be sent
The frequency correction amount B2 of blower fan 16, and frequency correction amount B2 is exported to comparing section 80.Conversion coefficient β 2 be on the occasion of.
Frequency correction amount B2=β 2 × (suction pressure higher limit PB- compressor suction pressure Psuc)…(3)。
Comparing section 80 is by comparison frequency correction amount B1 and frequency correction amount B2, the side for selecting correction amount therein low,
And exported as frequency correction amount B to comparing section 76.
When frequency correction amount B is 0 (zero) or negative value (B≤0), frequency correction amount B is exported and transported to addition by comparing section 76
Calculation portion 82, frequency correction amount B be on the occasion of when (B ＞ 0), frequency correction amount A is exported to addition operation division 82.
Addition operation division 82 adds frequency correction amount A or frequency correction amount B to the frequency of the present situation of EGR pressure fan 16, and
Exported as the frequency instruction value of EGR pressure fan 16 to EGR pressure fan 16.
In this way, the control of the pressure fan rotation speed control section 42 according to Fig. 3, in compressor suction pressure PsucHigher than suction
Enter upper pressure limit value PAOr suction pressure higher limit PBWhen, because conversion coefficient β 2, β 1 are on the occasion of thus the frequency that calculates mends
Positive quantity B1, B2 is negative value.
Therefore, pressure fan rotation speed control section 42 is added by being exported to EGR pressure fan 16 to the frequency of the present situation of EGR pressure fan 16
Frequency instruction value after the frequency correction amount B of negative value, can make the rotating speed of EGR pressure fan 16 be less than present situation.Thus, it is oriented to and returns
Gas turns into negative pressure with the EGR gases of housing 24, prevents EGR gases to system outward leakage.
In addition, when frequency correction amount B is 0, pressure fan rotation speed control section 42 is carried out without the frequency to EGR pressure fan 16
Correction, therefore will be output to addition operation division 82 for 0 frequency correction amount B, without correction by frequency instruction value export to
EGR pressure fan 16.
On the other hand, when frequency correction amount A be on the occasion of when, represent present situation O2Concentration is higher than target O2Concentration, waste gas mixing
Amount is not enough.
Therefore, frequency correction amount A and frequency correction amount B be on the occasion of when, pressure fan rotation speed control section 42 to EGR by blowing
Machine 16 export the frequency of the present situation of EGR pressure fan 16 is added on the occasion of frequency correction amount A after frequency instruction value, send EGR
The frequency of blower fan 16 is higher than present situation.Thus, it is oriented to return gas many with the quantitative change of the EGR gases of housing 24, the increasing of waste gas combined amount
Plus.
As described above, the denitrification apparatus 10 involved by present embodiment possesses：Exhaust gas turbine 18, is discharged by diesel engine 12
Waste gas and be driven in rotation；Compressor 20, the air and EGR that will be attracted by the rotation driving of exhaust gas turbine 18 from suction inlet
Gas compression, and sent out to diesel engine 12；Gas housing 24 is returned, suction inlet will be oriented to after air and EGR gas mixings；Disappear
Sound device 26, is connected with returning to gas housing 24, and directs the air to return to gas housing 24；And EGR pressure fan 16, will
A part for waste gas is sent out as EGR gases to gas housing 24 is returned.It is oriented to moreover, denitrification apparatus control device 40 is determined
The pressure of the gas of compressor 20, and the rotating speed of EGR pressure fan 16 is controlled, so that compressor suction pressure PsucSubatmospheric.
Therefore, the denitrification apparatus control device 40 involved by present embodiment can prevent from being sent to the EGR gases of diesel engine 12
To system outward leakage.
More than, using above-mentioned embodiment, the present invention is described, but the technical scope of the present invention is not limited to
The record scope of above-mentioned embodiment.Without departing from the spirit and scope of the present invention, a variety of become can be implemented to above-mentioned embodiment
More or improvement, and by the change or improvement after mode be also included in the technical scope of the present invention.
For example, in the above-described embodiment, the rotating speed of EGR pressure fan 16 is controlled pressure fan rotation speed control section 42, so that
Compressor suction pressure PsucAs with scavenging pressure PsAnd supercharger speed NtSituation below corresponding higher limit is carried out
Illustrate, but the present invention is not limited solely to this.EGR can be controlled using the pressure fan rotation speed control section 42 of pressure fan rotation speed control section 42
The rotating speed of pressure fan 16, so as to as the mode below the higher limit corresponding with engine load or engine speed.Moreover,
The rotating speed of EGR pressure fan 16 can also be controlled using pressure fan rotation speed control section 42, so that compressor suction pressure PsucAs with
Scavenging pressure Ps, supercharger speed Nt, below the corresponding higher limit of at least one of engine load and engine speed
Mode.
Also, in the above-described embodiment, to controlling the rotating speed of EGR pressure fan 16 so that compressor suction pressure PsucIt is low
It is illustrated in the mode of atmospheric pressure, but the present invention is not limited thereto.As long as compressor suction pressure PsucControl into less than
Atmospheric pressure, it is for instance possible to use denitrification apparatus control device 40 does not control EGR pressure fan 16 and controls opening for EGR valve 32
Degree, or the together aperture of control EGR pressure fan 16 and EGR valve 32, so that compressor suction pressure PsucSubatmospheric side
Formula.
Symbol description
10- denitrification apparatus, 12- diesel engines, 16-EGR pressure fan, 18- exhaust gas turbines, 20- compressors, 24- returns to gas
With housing, 26- mufflers, 38- pressure sensors, 40- denitrification apparatus control devices, 42- pressure fan rotation speed control sections.
Claims (7)
1. a kind of control device of denitrification apparatus, the denitrification apparatus possesses：
Exhaust gas turbine, is driven in rotation by the waste gas that internal combustion engine is discharged；
Compressor, by the rotation driving of the exhaust gas turbine, by a part for the air attracted from suction inlet and the waste gas
Compression, and sent out to the internal combustion engine；
Air introducing mechanism, the compressor is oriented to by the air；And
Pressure fan, the waste gas is sent out to the compressor,
The control device of the denitrification apparatus is characterised by possessing：
Piezometry mechanism, determines the pressure for the gas for being oriented to the compressor；And
Rotation speed control mechanism, controls the rotating speed of the pressure fan, so that the pressure measurements that the piezometry mechanism is determined
Subatmospheric.
2. the control device of denitrification apparatus according to claim 1, it is characterised in that
The piezometry mechanism is arranged near the end face of the air intake of the air introducing mechanism.
3. the control device of denitrification apparatus according to claim 1 or 2, it is characterised in that
The rotation speed control mechanism controls the rotating speed of the pressure fan, so that the pressure measurements turn into and scavenging pressure, institute
State any of the rotating speed of rotating speed, the load of the internal combustion engine and the internal combustion engine of compressor corresponding higher limit with
Under.
4. the control device of denitrification apparatus according to claim 3, it is characterised in that
The denitrification apparatus is arranged on ship,
The higher limit has the scope corresponding with the load change of the foreseeable internal combustion engine in the vessel motion.
5. the control device of denitrification apparatus according to any one of claim 1 to 4, it is characterised in that
The rotation speed control mechanism is to the rotating speed of the pressure fan calculated according to the oxygen concentration for being supplied to the internal combustion engine
Maked corrections, so that the pressure measurements subatmospheric.
6. a kind of denitrification apparatus, it is characterised in that possess：
Exhaust gas turbine, is driven in rotation by the waste gas that internal combustion engine is discharged；
Compressor, by the rotation driving of the exhaust gas turbine, by a part for the air attracted from suction inlet and the waste gas
Compression, and sent out to the internal combustion engine；
Air introducing mechanism, the compressor is oriented to by the air；
Pressure fan, the waste gas is sent out to the compressor, and
Control device, it has the piezometry mechanism for determining the gas pressure for being oriented to the compressor and controls the air-supply
The rotating speed of machine, so that the subatmospheric rotation speed control mechanism of pressure measurements that the piezometry mechanism is determined.
7. a kind of control method of denitrification apparatus, the denitrification apparatus possesses：
Exhaust gas turbine, is driven in rotation by the waste gas that internal combustion engine is discharged；
Compressor, by the rotation driving of the exhaust gas turbine, by a part for the air attracted from suction inlet and the waste gas
Compression, and sent out to the internal combustion engine；
Air introducing mechanism, the compressor is oriented to by the air；And
Pressure fan, the waste gas is sent out to the compressor,
The control method of the denitrification apparatus is characterised by possessing：
First process, the pressure for the gas for being oriented to the compressor is determined by piezometry mechanism；And
Second process, controls the rotating speed of the pressure fan, so that the pressure measurements that the piezometry mechanism is determined are less than
Atmospheric pressure.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-115837 | 2013-05-31 | ||
| JP2013115837A JP6096056B2 (en) | 2013-05-31 | 2013-05-31 | Denitration device control device, denitration device, and denitration device control method |
| CN201480010580.0A CN105051361B (en) | 2013-05-31 | 2014-05-26 | The control method of the control device of denitrification apparatus, denitrification apparatus and denitrification apparatus |
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| CN201480010580.0A Division CN105051361B (en) | 2013-05-31 | 2014-05-26 | The control method of the control device of denitrification apparatus, denitrification apparatus and denitrification apparatus |
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| CN201480010580.0A Active CN105051361B (en) | 2013-05-31 | 2014-05-26 | The control method of the control device of denitrification apparatus, denitrification apparatus and denitrification apparatus |
| CN201710308944.9A Pending CN107269405A (en) | 2013-05-31 | 2014-05-26 | The control method of the control device of denitrification apparatus, denitrification apparatus and denitrification apparatus |
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| JP (1) | JP6096056B2 (en) |
| KR (1) | KR101833111B1 (en) |
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| CN105511436B (en) * | 2015-12-25 | 2016-07-27 | 山东国电技术咨询有限公司 | The control method for coordinating of two reactor ammonia spraying amounts of flue gas denitrification system and system |
| JP6200537B1 (en) * | 2016-03-18 | 2017-09-20 | 三菱重工業株式会社 | EGR system |
| JP6109988B1 (en) * | 2016-03-18 | 2017-04-05 | 三菱重工業株式会社 | EGR system |
| JP6841645B2 (en) * | 2016-12-12 | 2021-03-10 | 三菱重工業株式会社 | EGR system and diesel engine |
| JP6789793B2 (en) * | 2016-12-13 | 2020-11-25 | 三菱重工業株式会社 | Internal combustion engine |
| CN107299868A (en) * | 2017-06-26 | 2017-10-27 | 李宏江 | The method that motor exhaust circulation oxygenation burning eliminates pollutant emission |
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| KR100308062B1 (en) * | 1999-02-09 | 2001-09-13 | 이계안 | Air suction device for diesel engine |
| JP2004052593A (en) * | 2002-07-17 | 2004-02-19 | Meidensha Corp | Denitration equipment |
| JP2011225685A (en) * | 2010-04-16 | 2011-11-10 | Yanmar Co Ltd | Gasification power generation system |
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2013
- 2013-05-31 JP JP2013115837A patent/JP6096056B2/en active Active
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2014
- 2014-05-26 CN CN201480010580.0A patent/CN105051361B/en active Active
- 2014-05-26 WO PCT/JP2014/063776 patent/WO2014192669A1/en active Application Filing
- 2014-05-26 KR KR1020157023010A patent/KR101833111B1/en active IP Right Grant
- 2014-05-26 CN CN201710308944.9A patent/CN107269405A/en active Pending
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| JPH0385373A (en) * | 1989-08-28 | 1991-04-10 | Sanshin Ind Co Ltd | Ignition device of ship propelling machine |
| JP2002332919A (en) * | 2001-02-26 | 2002-11-22 | Mitsubishi Heavy Ind Ltd | Exhaust gas recirculation system |
| JP2006088423A (en) * | 2004-09-22 | 2006-04-06 | Rengo Co Ltd | Manufacturing apparatus of single-face corrugated cardboard |
| US20080223038A1 (en) * | 2005-10-10 | 2008-09-18 | Behr Gmbh & Co. Kg | Arrangement for Recirculating and Cooling Exhaust Gas of an Internal Combustion Engine |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6096056B2 (en) | 2017-03-15 |
| KR20150110750A (en) | 2015-10-02 |
| KR101833111B1 (en) | 2018-02-27 |
| CN105051361B (en) | 2018-06-05 |
| CN105051361A (en) | 2015-11-11 |
| JP2014234746A (en) | 2014-12-15 |
| WO2014192669A1 (en) | 2014-12-04 |
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