CN106870186A - Dual fuel engine fuel injection manner - Google Patents

Dual fuel engine fuel injection manner Download PDF

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Publication number
CN106870186A
CN106870186A CN201710056848.XA CN201710056848A CN106870186A CN 106870186 A CN106870186 A CN 106870186A CN 201710056848 A CN201710056848 A CN 201710056848A CN 106870186 A CN106870186 A CN 106870186A
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CN
China
Prior art keywords
fuel
injection
ignited
cylinder
engine
Prior art date
Application number
CN201710056848.XA
Other languages
Chinese (zh)
Inventor
隆武强
田华
王洋
田江平
崔靖晨
冯立岩
陈雷
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大连理工大学
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Priority to CN2016100788254 priority Critical
Priority to CN201610078825.4A priority patent/CN105649810A/en
Application filed by 大连理工大学 filed Critical 大连理工大学
Publication of CN106870186A publication Critical patent/CN106870186A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling 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
    • F02D19/0639Controlling 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 characterised by the type of fuels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling 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
    • F02D19/0639Controlling 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 characterised by the type of fuels
    • F02D19/0642Controlling 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 characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling 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
    • F02D19/0639Controlling 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 characterised by the type of fuels
    • F02D19/0642Controlling 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 characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0644Controlling 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 characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being hydrogen, ammonia or carbon monoxide
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling 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
    • F02D19/0639Controlling 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 characterised by the type of fuels
    • F02D19/0642Controlling 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 characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0647Controlling 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 characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling 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
    • F02D19/0639Controlling 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 characterised by the type of fuels
    • F02D19/0649Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
    • F02D19/0652Biofuels, e.g. plant oils
    • F02D19/0655Biofuels, e.g. plant oils at least one fuel being an alcohol, e.g. ethanol
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling 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
    • F02D19/08Controlling 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 simultaneously using pluralities of fuels
    • F02D19/10Controlling 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 simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling 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
    • F02D19/08Controlling 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 simultaneously using pluralities of fuels
    • F02D19/10Controlling 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 simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
    • F02D19/105Controlling 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 simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous operating in a special mode, e.g. in a liquid fuel only mode for starting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/30Controlling fuel injection
    • F02D41/3011Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3017Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/30Controlling fuel injection
    • F02D41/3011Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3017Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
    • F02D41/3035Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the premixed charge compression-ignition mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/30Controlling fuel injection
    • F02D41/3094Controlling fuel injection the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D2250/00Engine control related to specific problems or objectives
    • F02D2250/36Control for minimising NOx emissions

Abstract

A kind of fuel injection manner of dual fuel engine, belongs to the field of combustion technology of engine.According to engine operating condition, it is ignited fuel and is all sprayed by air inlet side by air inlet side cylinder injection or all by cylinder cap direct-injection or a part, another part passes through cylinder cap direct-injection or do not spray to be ignited fuel.Be ignited fuel and the air of air inlet side injection form thin premixed gas, and fuel is ignited by cylinder cap direct-injection, and to spraying during compression top center after the exhaust valve closure, or pilot fuel sprays simultaneously, or is sprayed in expansion stroke early stage.The premixed gas of fuel is ignited near pilot fuel, the cylinder that ignites.By controlling air inlet side to spray and being ignited fuel ratio and injection phase by cylinder cap direct-injection, make engine according to different operating modes using the one kind in pre-mixing combustion, premixing/diffusion mixed combustion, three kinds of modes of diffusion combustion, on the premise of dynamic property is ensured, the high-efficiency cleaning burning of full working scope is reached.

Description

Dual fuel engine fuel injection manner
Technical field
The present invention relates to a kind of fuel injection manner of dual fuel engine, belong to the field of combustion technology of engine.
Background technology
Due to gaseous fuel aboundresources, availability and economy is high, emission performance is good, people are more and more in diesel engine Upper setting natural gas supply system, becomes dual fuel engine.This dual fuel engine is fired using natural gas as main Material, is ignited combustion mixture with a small amount of diesel oil near.During small operating mode, dual fuel engine log oil.Mesh Preceding dual fuel engine can only select the one kind in premixed combustion mode or diffusion combustion mode.Using pre-mixing combustion side The dual fuel engine of formula is the generation for avoiding pinking, and mixture strength is typically relatively low, and timing of igniting can not be too early, result in dynamic The deficiency of power;Although using the dual fuel engine dynamic property and better economy of diffusion combustion mode, discharge meets not New standard.Alcohols dual fuel engine, also there is similar problem.
The content of the invention
In order to the dynamic property, economy and the emission performance that solve the problems, such as existing dual fuel engine can not be while ensure, sheet Invention provides a kind of fuel injection manner of dual fuel engine.Fuel will be ignited to be sprayed by air inlet side respectively(Four strokes It is that, by air intake duct, two-stroke is to cover direct-injection by scavenging port top cylinder)Directly sprayed with by cylinder cap, and and pilot fuel Injection is combined, according to engine operating condition size, the injection of adjustment air inlet side and cylinder cap directly injection be ignited fuel ratio and Injection phase so that engine takes most suitable in pre-mixing combustion, premixing/diffusion combustion, three kinds of modes of diffusion combustion A kind of mode work, change the situation that traditional dual fuel engine can only work under a kind of combustion system all the time.From And realize that the high-efficiency cleaning in the range of full working scope burns, and ensure dynamic property.
The technical solution adopted by the present invention is:A kind of fuel injection manner of dual fuel engine, including it is ignited fuel Injection and pilot fuel injection and cooperation therebetween.According to engine strokes number and the difference of operating mode, combustion is ignited Material is all sprayed by air inlet side, i.e. four strokes are that, by intake port injection, two-stroke is to cover straight by scavenging port top cylinder Spray, or all by cylinder cap direct-injection, or a part, by air inlet side injection, another part passes through cylinder cap direct-injection, or wholly off Injection;In idling or less than 10% operating mode, the fuel that is ignited all is sprayed into cylinder by cylinder cap direct-injection, or wholly off Injection;In 10% -70% operating mode, the fuel that is ignited all is sprayed by air inlet side;Operating mode more than 70%, the quilt Pilot fuel is all divided into two parts injection by cylinder cap direct-injection, or the fuel that is ignited, and a part is sprayed by air inlet side, Form thin premixed gas with air, another part be ignited fuel after the exhaust valve closure after to leading to during compression top center Cross cylinder cap to be injected directly into cylinder, spray the pilot fuel near and ignite gaseous mixture, or in expansion stroke morning A phase injection part is ignited fuel, is pre-mixed conflagration after flame ignition;The fuel that is ignited is selected from natural gas, first One or more mixture in alkane, ethane, propane, butane, hydrogen, liquefied petroleum gas, or described it is ignited fuel Selected from one or more the mixture in the alcohols such as methyl alcohol, ethanol;The pilot fuel is selected from diesel oil, dimethyl ether, life One or more mixture in thing diesel oil, kerosene.It is save space, pilot fuel nozzle and is ignited fuel nozzle Can be assemblied in a fuel injector.
High-pressure injection is used by the fuel that is ignited of cylinder cap direct-injection, to compression top center after being injected in after exhaust valve closure Period is carried out;
High-pressure injection is used by the fuel that is ignited of cylinder cap direct-injection, is carried out simultaneously with the pilot fuel injection;
High-pressure injection is used by the fuel that is ignited of cylinder cap direct-injection, be injected in expansion stroke is carried out in early days;
High-pressure injection is used by the fuel that is ignited of cylinder cap direct-injection, spray is carried out several times;
The fuel that is ignited of scavenging port top cylinder set direct-injection uses low-pressure fuel injection;
The fuel that is ignited of scavenging port top cylinder set direct-injection uses high-pressure injection.
The beneficial effects of the invention are as follows:In idling or less than 10% operating mode, it is ignited fuel and is all directly sprayed by cylinder cap Enter in cylinder or stop injection and be ignited fuel, it is possible to reduce restriction loss, and the burning and discharge for having ensured.10% -70% Operating mode, be ignited fuel all by air inlet side spray, the economy and emission performance that can be obtained to greatest extent.70% Operating mode above, is ignited a part fuel and is sprayed by air inlet side, is sufficiently mixed with air, and another part is ignited fuel It is injected directly into cylinder by cylinder cap, forms layering, economy and emission performance that the dynamic property of maximum is become reconciled can be obtained;Can also Fuel will be ignited all to be injected directly into cylinder by cylinder cap, realize based on diffusion combustion, dynamic property being improved to greatest extent.Ignite Fuel ignites and generate after gaseous mixture that NOx is few, and unburned mixture is difficult pinking, therefore using compression ratio higher and can increase pre- Mixture strength, improves economy and dynamic property;The a small amount of fuel that is ignited sprayed into again after igniting burns in injection, brings into more Many Turbulent Kinetics, accelerate unburned mixture burning in cylinder, reduce the discharge of unburned fuel, engine is operated in approximate equipressure Circulation pattern, realizes that high-efficiency cleaning burns.
Brief description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 represents that the fuel air road that is ignited in four stroke dual-fuel engine induction strokes sprays and mixed process.
What Fig. 2 represented for four stroke dual-fuel engine induction stroke latter stages is ignited course of injection in fuel tank.
Fig. 3 is represented in four stroke dual-fuel engine compresses strokes and is ignited course of injection in fuel tank.
Fig. 4 represents the pilot fuel injection and in-cylinder combustion in four stroke dual-fuel engine compresses stroke latter stages.
Fig. 5 represent four stroke dual-fuel engine compresses stroke latter stages be ignited fuel and pilot fuel spray simultaneously and In-cylinder combustion.
What Fig. 6 represented for four stroke dual-fuel engine expansion stroke early stages is ignited fuel cylinder injection and burning.
Fig. 7 represents that four stroke dual-fuel engines operating mode below 10% stops injection and is ignited fuel and WOT.
Fig. 8 represents four stroke dual-fuel engines operating mode near below 10% only with pilot fuel injection.
Fig. 9 represents two-stroke dual fuel engine arrangement of nozzles schematic diagram.
In figure:1st, air intake duct, 2, be ignited fuel nozzle in air intake duct, 3, intake port injection be ignited fuel, 4, enter Valve, 5, intake port injection be ignited the gaseous mixture of fuel and air inlet, thin combustion mixture in 5a, cylinder, 6, pilot fuel spray Mouth, 7, light fluid beam, 8, cylinder cap direct-injection be ignited fuel nozzle,(The pilot fuel nozzle of four-stroke machine is sprayed with fuel is ignited Mouth is assemblied in a fuel injector, the pilot fuel nozzle of two-stroke machine and to be ignited fuel nozzle be independent)9a, air inlet row Fuel spray is ignited in journey cylinder, fuel spray, the cylinder that 9c and light fluid beam spray simultaneously are ignited in 9b, compression travel cylinder Fuel spray is inside ignited, fuel spray is ignited in 9d, expansion stroke cylinder, 10, air throttle, 11, air inlet, 12, scavenging port, 13rd, scavenging port top cylinder set direct-injection is ignited fuel nozzle.
Specific embodiment
As shown in figure 1, the air intake duct in suction stroke in air intake duct 1 is ignited the injection of fuel nozzle 2 is ignited fuel 3, Enter cylinder with air, form the gaseous mixture 5 that intake port injection is ignited fuel and air.
As shown in Figures 2 and 3, intake port injection is ignited the work of the gaseous mixture 5 in In Cylinder Flow of fuel and air Lower diffusion is used, thin combustion mixture 5a in more uniform cylinder is formed, fuel nozzle 8 is ignited in cylinder can be in exhaust valve closure Fuel is ignited to compression stroke top dead center injection afterwards, can form denseer flammable mixed near the cylinder top of atomizer 6 Close gas.
As shown in figure 4, compression travel latter stage, the jet-ignition of atomizer 6 oil beam 7, by the combustion mixture near atomizer Ignite, the Turbulent Combustion Flame of formation is rapid to be propagated in cylinder.
As shown in figure 5, the injection that fuel is ignited in cylinder can also so make with the injection of light fluid beam 7 while carry out Obtain with light fluid beam and moved while being ignited further amplification fire ignition energy and turbulent flow after fuel spray 9c is ignited in the cylinder for spraying Can, accelerate the burning of thin combustion mixture in cylinder.This mode actually increases the proportion of diffusion combustion.
As shown in fig. 6, after the combustion mixture in cylinder is ignited, can again carry out being ignited in cylinder in expansion stroke early stage The injection of fuel.Now engine piston starts descending, it is possible to achieve Near Constant Pressure Combustion, is not increasing in-cylinder combustion peak value pressure Dynamic property is improved under conditions of power.
As shown in Figure 7 and Figure 8, in idling or less than 10% operating mode, can stop being ignited fuel in air intake duct and cylinder Injection, keep WOT, only with pilot fuel near injection.
As shown in figure 9, the air inlet side injection nozzle of two-stroke dual fuel engine, i.e., installed in scavenging port top cylinder set Direct-injection be ignited the injection pressure of fuel nozzle 13 can also low-pressure fuel injection, its fuel injection manner and four with high-pressure injection Stroke dual-fuel engine is identical.
On a middling speed high-power marine natural gas Diesel Dual-Fuel Engine, using following fuel injection manner:
1)Stop injection natural gas in idling and less than 10% operating mode, only injection diesel oil.
2)In 10% -70% operating mode, natural gas is all by intake port injection.
3)Operating mode more than 70%, natural gas is divided into two parts injection.It is 70% by intake port injection part accounting, with Air forms thin premixed gas;By the accounting that cylinder cap is injected directly into cylinder interior point it is 30% in compression travel.
The 2% of total fuel quantity diesel oil ignited gaseous mixture is sprayed before compression top center.
Using this new spray regime, the dynamic property of dual fuel engine improves 10%, and economy improves 3%, and discharge reaches To the Tier III standards of International Maritime Organization IMO.

Claims (7)

1. a kind of fuel injection manner of dual fuel engine, including it is ignited the injection of fuel and the injection of pilot fuel and two Cooperation between person, it is characterized in that:It is described to be ignited fuel all by air inlet according to engine strokes number and the difference of operating mode Side spray is penetrated, i.e. four strokes are that, by intake port injection, two-stroke is to cover direct-injection by scavenging port top cylinder, or all by cylinder Lid direct-injection, an or part is sprayed by air inlet side, and another part passes through cylinder cap direct-injection;It is described in idling or less than 10% operating mode Fuel is ignited all by cylinder cap direct-injection, or stops being ignited fuel described in injection, and only pilot fuel;10%- 70% operating mode, the fuel that is ignited all is sprayed by air inlet side;Operating mode more than 70%, it is described to be ignited fuel whole It is injected directly into cylinder by cylinder cap, or the fuel that is ignited is divided into two parts injection, a part is sprayed by air inlet side, with sky Gas forms thin premixed gas, some after the exhaust valve closure after to directly being sprayed by cylinder cap during compression top center Enter in cylinder, spray the pilot fuel near and ignite gaseous mixture, or a part is sprayed in expansion stroke early stage It is ignited fuel;The fuel that is ignited is selected from natural gas, methane, ethane, propane, butane, hydrogen, liquefied petroleum gas Kind or more than one mixture, or it is described be ignited that fuel is selected from the alcohols such as methyl alcohol, ethanol one or more Mixture;The pilot fuel is selected from one or more the mixture in diesel oil, dimethyl ether, biodiesel, kerosene.
2. the fuel injection manner of a kind of dual fuel engine according to claim 1, it is characterized in that:By cylinder cap direct-injection The fuel that is ignited use high-pressure injection, to carrying out during compression top center after being injected in after exhaust valve closure.
3. the fuel injection manner of a kind of dual fuel engine according to claim 1, it is characterized in that:By cylinder cap direct-injection The fuel that is ignited use high-pressure injection, with the pilot fuel injection simultaneously carry out.
4. the fuel injection manner of a kind of dual fuel engine according to claim 1, it is characterized in that:By cylinder cap direct-injection The fuel that is ignited use high-pressure injection, be injected in expansion stroke early stage carry out.
5. the fuel injection manner of a kind of dual fuel engine according to claim 1, it is characterized in that:By cylinder cap direct-injection The fuel that is ignited use high-pressure injection, injection is carried out several times.
6. the fuel injection manner of a kind of dual fuel engine according to claim 1, it is characterized in that:It is described by scavenging The fuel that is ignited of mouth top cylinder set direct-injection uses low-pressure fuel injection.
7. the fuel injection manner of a kind of dual fuel engine according to claim 1, it is characterized in that:It is described by scavenging The fuel that is ignited of mouth top cylinder set direct-injection uses high-pressure injection.
CN201710056848.XA 2016-02-04 2017-01-26 Dual fuel engine fuel injection manner CN106870186A (en)

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CN2016100788254 2016-02-04
CN201610078825.4A CN105649810A (en) 2016-02-04 2016-02-04 Fuel injection manner of double-fuel engine

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Cited By (31)

* Cited by examiner, † Cited by third party
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CN109026412A (en) * 2018-07-24 2018-12-18 哈尔滨工程大学 A kind of dual fuel engine lean burn method for organizing
CN109184982A (en) * 2018-09-29 2019-01-11 哈尔滨工程大学 A kind of natural gas engine burning tissues method ignited using manifold multi-injection, precombustion chamber low pressure gas supply and the micro- spray of diesel oil
CN109209656A (en) * 2018-09-29 2019-01-15 哈尔滨工程大学 A kind of multi-injection and precombustion chamber low pressure gas supply and diesel oil is micro- sprays the natural gas engine burning tissues method ignited
CN109268170A (en) * 2018-07-24 2019-01-25 哈尔滨工程大学 Band crosspointer valve fuel injector compound type air supply dual fuel engine system and combustion method
CN109296446A (en) * 2018-09-29 2019-02-01 哈尔滨工程大学 A kind of diesel oil with natural gas high-low pressure mixing jetting and precombustion chamber is micro- to spray natural gas engine burning tissues method of igniting
CN109441626A (en) * 2018-09-01 2019-03-08 哈尔滨工程大学 A kind of dual fuel engine and its burning tissues method using major-minor fuel injector and manifold multi-injection
CN109899150A (en) * 2019-02-18 2019-06-18 哈尔滨工程大学 One kind being suitable for the micro- spray diesel oil of large-diameter-natural gas double fuel engine stratified combustion control method
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