CN105888832A - Miller cycle diesel oil-natural gas dual fuel engine and control method thereof - Google Patents

Miller cycle diesel oil-natural gas dual fuel engine and control method thereof Download PDF

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Publication number
CN105888832A
CN105888832A CN201610389615.7A CN201610389615A CN105888832A CN 105888832 A CN105888832 A CN 105888832A CN 201610389615 A CN201610389615 A CN 201610389615A CN 105888832 A CN105888832 A CN 105888832A
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valve
fuel
diesel oil
intake valve
air
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CN105888832B (en
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高莹
刘洪岐
麻斌
徐英健
李君�
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Jilin University
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Jilin University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B69/00—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types
    • F02B69/02—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel
    • F02B69/04—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel for gaseous and non-gaseous fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • F02B37/183—Arrangements of bypass valves or actuators therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0223—Variable control of the intake valves only
    • F02D13/0226—Variable control of the intake valves only changing valve lift or valve lift and timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/401—Controlling injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/402—Multiple injections
    • F02D41/403—Multiple injections with pilot injections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D2013/0292—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation in the start-up phase, e.g. for warming-up cold engine or catalyst
    • 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
    • F02D2041/001—Controlling intake air for engines with variable valve actuation
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Supercharger (AREA)

Abstract

The invention discloses a Miller cycle diesel oil-natural gas dual fuel engine and a control method thereof, and relates to the technical field of engines. An early closing mode of an intake valve is realized through adjusting an intake valve adjusting mechanism; and a compression ratio is changed to separate from an expansion ratio, so that the cooling of mixed gas is facilitated, the thermal load of the engine is reduced, the positive suction power is generated in the expansion process to improve the thermal efficiency of the engine, and the fuel economy is preferably improved. The new control method is used for converting high/low compression ratio more flexibly, so that the diesel oil-natural gas dual fuel engine can achieve high-efficiency combustion operation in a full-load range.

Description

Miller cycle diesel oil-natural gas double fuel engine and control method thereof
Technical field
The invention belongs to technical field of engines, be specifically related to a kind of Miller cycle diesel oil-natural gas double-fuel and start Machine and control method thereof.
Background technology
Due to the fast development of modern industry, conventional automotive fuels price constantly soaring, engine emission standard Increasingly stricter, development cleaning, economic gas engine increasingly cause the concern of society, with natural gas The focus of research institution of various countries research is become as engine fuel.But natural gas engine is in use Have that power drop is serious, course continuation mileage is short, need the problems such as favorably situated aerating website, and tradition bavin Oil machine moment of torsion is big, power foot, course continuation mileage are long.Therefore, endeavour research one by tradition the most always Fuel oil increases course continuation mileage, and the dual fuel engine of the economy of bound gas fuel, the feature of environmental protection；In order to Compression ratio change problem greatly when solving to use two kinds of different fuels, effective compression ratio regulation technology becomes realization The key of dual fuel engine.
In prior art, Application No. 01823015.6, the patent of invention of entitled " dual fuel engine ", It is that compression ratio control valve is set on engine cylinder head, during combustion gas operating, opens this control at the compression initial stage Valve, release part has been enter into the gas mixture of cylinder, reduces actual compression ratio.This control compression ratio Mechanism can only open after lower dead center, and produces pumping loss at push.This compression ratio adjusts machine Conventional engines is changed big by structure, it is achieved mode difficulty.
Miller cycle technological core is to make compression ratio separate with expansion ratio, utilizes high expansion ratio to improve the thermal efficiency Reducing delivery temperature, the lowest effective compression ratio can prevent pinking.During engine gas operating, quick-fried for avoiding It is serious that shake compression ratio to be made is less than diesel electromotor, engine efficiency and power drop.Application Miller cycle Intake valve early closes and makes compression ratio separate with expansion ratio, and the combustion mode of low temperature supercharging is possible not only to realize electromotor Double fuel operating and also can be effectively improved combustion gas operating time electromotor performance.
Summary of the invention
The present invention is formed in view of the foregoing, and problem to be solved is: for natural gas engine by aerating Stand the problems such as restriction, course continuation mileage be short, solve existing dual fuel engine implementation and the deficiency of performance, There is provided the Miller cycle diesel oil of the advantages such as simple, economic and environment-friendly, the low good endurance of thermic load of a kind of implementation- Natural gas double fuel engine.
For achieving the above object, the present invention proposes a kind of Miller cycle diesel oil-natural gas double fuel engine, By piston, cylinder, combustor, compressor, turbine, exhaust gas by-pass valve, air vent, air bleeding valve, bavin Oil regulation valve, fuel pressure transmitter, fuel temperature sensor, combustion gas quality flow transducer, combustion gas supply Answer valve, air inlet pressure sensor, air inlet, intake valve, fuel injector, intake valve governor motion, fuel tank, Load signal, tach signal, engine supervisory system, electronic control unit, air accumulator, gaseous-pressure pass Sensor, charge air cooler and air filter composition.
Being provided with intake valve, air bleeding valve on engine cylinder lid, what intake valve governor motion was arranged on cylinder cap enters Air valve side；
Described engine supervisory system, including: be arranged on the engine rotational speed signal in described engine body, Engine load signal, air inlet pressure sensor, combustion gas quality sensor, fuel pressure transmitter, fuel oil Temperature sensor, gaseous-pressure sensor, in real time monitor the duty of described electromotor and will monitor Information output is to described electronic control unit；
Described electronic control unit, receives the output information of each system of electromotor, analyzes and processes this information backward Electromotor performs structure output actuating signal；
Described Fuel switching system, according to the actuating signal of described electronic control system, selectively open or Person closes the control valve of fuel gas supply system, it is achieved engine gas operating or diesel oil operating；
Described intake valve governor motion, according to Miller cycle control principle, selectively operates the pass of intake valve Close the moment；
It is characterized in that, described engine supervisory system is connected with electronic control unit, is further entering Possess combustion gas quality flow transducer at valve, possess pressure transducer at air inlet, fuel pipe possesses Having fuel pressure transmitter and fuel temperature sensor, electronic control unit is the input of the sensor signal Terminal.
Another object of the present invention is just to provide a kind of Miller cycle diesel oil-natural gas double fuel engine Control method, makes dual fuel engine can operate by efficient combustion in the range of full load.
For realizing foregoing invention mesh, the present invention proposes a kind of Miller cycle diesel oil-natural gas double fuel engine Control method:
Under diesel oil operation mode, electronic control unit controls gas supply valve and closes, and electromotor enters full bavin Oil pattern, supercharger compressor supply high temperature compressed air after air filter, charge air cooler by air inlet Mouth enters combustor, and the fuel oil in latter stage in compression travel enters fuel injector from fuel tank through fuel pipe, passes through Fuel injector sprays into diesel oil, and now intake valve makes electromotor work under valve timing, electromotor actual compression ratio Equal to expansion ratio, fuel oil carries out the combustion system of high compression ratio precombustion.
When combustion gas operates, electronic control unit is according to combustion gas quality, diesel oil governor valve control bavin oil injection Amount；The a small amount of diesel oil now sprayed ignites after being only used for compression ignition gas compressed fuel mixture.Enter Air valve governor motion, the corresponding startup of electromotor, underload through shoulder load to high load capacity, adjust into Air valve close moment, uses high compression ratio when startup, underload, uses low compression ratio when middle high load capacity.
Above-mentioned intake valve close moment is arranged on a certain moment in suction stroke before piston arrival lower dead center. Setting intake valve during high effective compression ratio and early close moment postponement, inlet period is long；Set during low effective compression ratio Intake valve early closes the moment in advance, and inlet period is short.
The present invention compared with prior art has the following advantages and beneficial effect: when using different fuel, changes The mode of compression ratio is the simplest；The control method that intake valve early closes, makes compression ratio separate with expansion ratio, low Effective compression ratio make gaseous fuel gaseous mixture experience an expansion process before compression travel, to gaseous mixture Carry out internal cooling, reduce engine heat load.Meanwhile, the positive suction merit of above-mentioned expansion process generation changes It is apt to the thermal efficiency of electromotor.The high expansion ratio utilizing Miller cycle strategy improves the thermal efficiency and reduces delivery temperature, The low good endurance of engine heat load.
Accompanying drawing explanation
Fig. 1 is Miller cycle diesel oil-natural gas double fuel engine structural representation.
Fig. 2 is Miller cycle P-V figure.
Detailed description of the invention
Embodiments of the present invention are described referring to the drawings.
Diesel oil of the present invention-natural gas double fuel engine main body primary structure includes 1. pistons；2. cylinder；3. Combustor；4. compressor；5. turbine；6. exhaust gas by-pass valve；7. air vent；8. air bleeding valve；9. diesel oil Regulation valve；10. fuel pressure transmitter；11. fuel temperature sensors；12. combustion gas quality flow transducers； 13. gas supply valves；14. air inlet pressure sensors；15. air inlets；16. intake valves；17. fuel injectors；18. Intake valve governor motion；19. fuel tanks；20. load signals；21. tach signals；22. electromotor monitorings are System；23. electronic control units；24. air accumulators；25 gaseous-pressure sensors；26. charge air coolers；27. air Cleaner.
In the cylinder 2 of electromotor, possesses the piston 1 moved back and forth and at the upper surface of piston 1 And form combustor 3, air inlet 15 and air vent 7 between the inner surface of cylinder cover to be connected with this combustor 3, It is also equipped with air inlet 15 carrying out the intake valve 16 of opening and closing, air vent 7 carrying out the air bleeding valve 8 of opening and closing；Cylinder Cover and be provided with intake valve governor motion 18, be connected with electronic control unit 23.
Engine supervisory system 22, as engine rotational speed signal 21 and the input terminal of load signal 20, Monitor the duty of electromotor in real time, and send monitoring signal to electronic control unit 23；Electronic Control Unit 23 using engine speed and load value as detection signal, by controlling the opening and closing of gas supply valve 13, Realize combustion gas operating or diesel operating.
Electronic control unit 23 receives the pressure signal of air inlet pressure sensor 14, according to the operating of electromotor State, adjusts the aperture of the exhaust gas by-pass valve 6 of supercharger 5, changes the admission pressure at air inlet 15.
When diesel oil operates, electronic control unit 23 controls gas supply valve 13 and closes, electronic control unit 23, according to fuel pressure transmitter 10, the signal of fuel temperature sensor 11, control diesel oil regulation valve 9 Aperture makes electromotor enter full diesel fuel mode, and the compressed air of compression unit 4 supply of supercharger 5 passes through air inlet Mouth 15 enters combustor 3, sprays into diesel oil in the latter stage of compression travel by fuel injector 17, now intake valve 16 Making electromotor work under valve timing, electromotor actual compression ratio is equal to expansion ratio, and fuel oil carries out high compression Burn than precombustion mode.
During combustion gas operating, gas supply valve 13 opens, gaseous fuel by air accumulator 24 through gas supply valve 13 Enter air inlet 15；Fuel gas mixes, after premixing with the compressed air supplied from compressed portion 4 Combustor 3 is entered by intake valve 16；The combustion gas quality flow transducer 12 being arranged in fuel gas pipeline will inspection Surveying signal and be input to electronic control unit 23, electronic control unit 23, according to combustion gas quality, sends control command Adjust the aperture of diesel oil regulation valve 9, spray the gas compressed fuel that ignites after a small amount of diesel compression catches fire and mix Close gas.
Supply stroke is when starting, electronic control unit 23 according to the pressure signal of air inlet pressure sensor 14, Control intake valve governor motion 18, make the intake valve 16 a certain moment before piston 1 reaches lower dead center close；
When starting and the underload of combustion gas operating, the moment setting intake valve 16 early pass is short, and inlet period is long, The compression ratio of the gaseous mixture set is high, it is achieved the steady running of electromotor.
When the high load capacity of combustion gas operating, setting intake valve 16 and early close the moment in advance, inlet period is shorter, if The compression ratio determining gaseous mixture is low.Electromotor increases to high load capacity from underload through shoulder load, with load Increase, intake valve 16 close moment gradually shifts to an earlier date, control compression ratio slowly reduce.
Fig. 2 show the P-V figure of the Miller cycle that intake valve 16 cuts out in advance；
Intake valve 16 starts descending at the front opening of top dead centre 28, piston 1 from top dead centre 28 position, under When walking to a certain position 29 before lower dead center, intake valve 16 cuts out；Piston 1 continues traveling downwardly to lower dead center, Gas in the jar point 29 after experience one isentropic expansion process point of arrival 30, be then passed through compression, do work, Expansion stroke completes a cycle of operation；In intake process, the isentropic expansion process of experience, is equivalent to air inlet Having carried out internal cooling, whole cycle of operation is carried out at relatively low temperature, it is suppressed that combustion gas operating is effectively compressed Than pinking tendency when improving.
When carrying out supply pressurization raising output and the thermal efficiency by supercharger, by suction stroke a and aerofluxus Clockwise enclosed area (dash area in Fig. 2) the shape coupled engines that stroke D-shaped becomes shows The suction merit of positive amount of work, can improve the thermal efficiency of electromotor.

Claims (2)

1. Miller cycle diesel oil-natural gas double fuel engine, by piston (1), cylinder (2), burning Room (3), compressor (4), turbine (5), exhaust gas by-pass valve (6), air vent (7), air bleeding valve (8), bavin Oil regulation valve (9), fuel pressure transmitter (10), fuel temperature sensor (11), combustion gas quality flow sensing Device (12), gas supply valve (13), air inlet pressure sensor (14), air inlet (15), intake valve (16), Fuel injector (17), intake valve governor motion (18), fuel tank (19), load signal (20), tach signal (21), Engine supervisory system (22), electronic control unit (23), air accumulator (24), gaseous-pressure sensor (25), Charge air cooler (26) and air filter (27) composition, it is characterised in that:
Piston (1) and cylinder (2) routing motion；
Air bleeding valve (8) is placed between combustor (3) and air vent (7)；
The intake valve (16) controlled by intake valve governor motion (18) be placed in combustor (3) and air inlet (15) it Between；
Fuel pressure transmitter (10), fuel temperature sensor (11), combustion gas quality flow transducer (12), Load signal (20), tach signal (21) are controlled by engine supervisory system (22)；
Exhaust gas by-pass valve (6), diesel oil regulation valve (9), gas supply valve (13), intake valve governor motion (18) Control by electronic control unit (23) with engine supervisory system (22)；
Fuel injector (17) is positioned at combustor (3) top, affixed with fuel tank (19) through diesel oil regulation valve (9), spray It is connected with fuel pressure transmitter (10) and fuel temperature sensor between oil device (17) and diesel oil regulation valve (9) (11)；
Compressor (4) is connected with air inlet (15) after air filter (27) and charge air cooler (26)；
Turbine (5) is connected with air vent (7) after exhaust gas by-pass valve (6)；
Air accumulator (24) is connected with air inlet (15) after gas supply valve (13), gas supply valve (13) and entering Combustion gas quality flow transducer (12) and air inlet pressure sensor (14) it is connected with between QI KOU (15).
2. the control method of Miller cycle diesel oil-natural gas double fuel engine, it is characterised in that include The following step:
1) electronic control unit (23) receives the gaseous-pressure sensing that engine supervisory system (22) gathers Device (25) signal, controls the opening and closing of gas supply valve (13)；
2), when gas supply valve (13) is opened, electromotor enters combustion gas operation mode, electronic control unit (23) according to tach signal (21), the load signal (20) of engine supervisory system (22) Real-time Collection, Control intake valve governor motion (18), make certain before piston (1) reaches lower dead center of intake valve (16) One moment closed；
3) using high compression ratio when startup, underload, intake valve governor motion (18) sets intake valve (16) moment early closed is short, and inlet period is long,
When the high load capacity of combustion gas operating, intake valve governor motion (18) uses low compression ratio, sets air inlet Valve (16) early closes the moment in advance, and inlet period is shorter；
4) the combustion gas quality flow transducer that electronic control unit (23) gathers according to monitoring system (22) (12) signal, control diesel oil regulation valve (9) aperture, spray a small amount of diesel oil ignite after compression ignition by The gaseous fuel gaseous mixture of compression；
5), when gas supply valve (13) cuts out, electromotor enters full diesel fuel mode, electronic control unit (23) Control intake valve governor motion (18), make intake valve (16) work under valve timing；
6) electronic control unit is according to fuel pressure transmitter (10), fuel temperature sensor (11) Signal, load signal (20), tach signal (21), control the aperture of diesel oil regulation valve (9)；
7) compressed air enters combustor (3) by air inlet (15), passes through in the latter stage of compression travel Fuel injector (17) sprays into diesel oil.
CN201610389615.7A 2016-06-05 2016-06-05 Miller cycle diesel oil-natural gas double fuel engine and its control method Active CN105888832B (en)

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Cited By (8)

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CN106523166A (en) * 2016-10-20 2017-03-22 哈尔滨工程大学 Bypass and complementary combustion supercharging system of LNG dual-fuel engine and control method thereof
CN108798874A (en) * 2018-07-23 2018-11-13 吉林大学 Multi-cylinder miller cycle engine cooperates with air inlet energy saver and its control method
WO2018206507A1 (en) * 2017-05-08 2018-11-15 Mtu Friedrichshafen Gmbh Reciprocating piston engine and system having a reciprocating piston engine, as well as method for operating the reciprocating piston engine
CN109555626A (en) * 2017-09-25 2019-04-02 曼恩能源方案有限公司 Injection nozzle and dual fuel engine for dual fuel engine
CN109723547A (en) * 2019-01-30 2019-05-07 一汽解放汽车有限公司 Flexible fuel engine and control method
CN109937291A (en) * 2016-11-15 2019-06-25 日立汽车系统株式会社 The variable system and its control method of internal combustion engine
CN110318858A (en) * 2019-06-26 2019-10-11 哈尔滨工程大学 A kind of diesel oil ignited formula natural gas engine combustion system and combustion method
CN113202628A (en) * 2021-06-02 2021-08-03 北京理工大学 Two-stage low-compression-cycle implementation method, device and detection method

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