CN109113880A - A kind of burning tissues method and its application of methanol/alcohol hydrogen-fueled internal combustion engine - Google Patents
A kind of burning tissues method and its application of methanol/alcohol hydrogen-fueled internal combustion engine Download PDFInfo
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- CN109113880A CN109113880A CN201810933593.5A CN201810933593A CN109113880A CN 109113880 A CN109113880 A CN 109113880A CN 201810933593 A CN201810933593 A CN 201810933593A CN 109113880 A CN109113880 A CN 109113880A
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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
- F02D41/0025—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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
- F02B19/1019—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber
- F02B19/108—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber
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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
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
- F02B19/1019—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber
- F02B19/108—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber
- F02B19/1085—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber controlling fuel injection
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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
- 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
- F02D19/0639—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 characterised by the type of fuels
- F02D19/0642—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 characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0644—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 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
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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
- 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
- F02D19/08—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 simultaneously using pluralities of fuels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
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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
- F02D41/30—Controlling fuel injection
- F02D41/3094—Controlling 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
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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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0227—Means to treat or clean gaseous fuels or fuel systems, e.g. removal of tar, cracking, reforming or enriching
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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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0278—Port fuel injectors for single or multipoint injection into the air intake system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
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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
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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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention discloses a kind of methanol/alcohol hydrogen-fueled internal combustion engine burning tissues method and its application, alcohol hydrogen is produced using the online catalytic reforming of waste heat from tail gas or cracking section methanol fuel, its main component is hydrogen, a part supply igniting chamber for the alcohol hydrogen produced forms hydrogen-rich gaseous mixture, and utilize plug ignition, the turbulent flame jet initiation source for forming high energy, lights methanol and alcohol hydrogen by air intake duct or cylinder injection and is formed by homogeneous lean gaseous mixture in cylinder.The present invention converts alcohol hydrogen for part methanol fuel and uses the burning tissues method, applied to internal combustion engine, igniting reliability can be improved, accelerate in-cylinder combustion process, improve anti-knock properties, higher compression ratio is adapted to, to improve engine thermal efficiency, and reduces the noxious emissions such as nitrogen oxides and particulate matter.A cylinder diameter be 210mm diesel engine on reequip experiments have shown that, the thermal efficiency increase by 4%, discharged nitrous oxides reduce by 85%, it is granular material discharged reduce by 95%.
Description
Technical field
The present invention relates to technical field of internal combustion engines, the burning tissues method of especially a kind of methanol/alcohol hydrogen-fueled internal combustion engine
And its application.
Background technique
Methanol may be used as the fuel of internal combustion engine, have efficient, clean feature, with the internal combustion using conventional petroleum fuels
Machine is compared, and the nitrogen oxides of internal combustion engine, oxysulfide and granular material discharged can be greatly lowered, have good development prospect.
Currently, methanol fuel is applied to internal combustion engine, mainly there are spark ignition and both diesel oil ignited combustion methods.
Spark ignition mode is mainly used in small bore engine, and combustion method is similar with gasoline engine, and which is not only suitable for
M100 fuel, i.e. M100 are also applied for the fuel combination of methanol and gasoline, such as (herein, digital representation is fired by M5, M15, M85
The volume fraction of methanol in material).Diesel oil ignited mode is applied to the relatively large engine of cylinder diameter, and methanol fuel generally uses
The mode that low pressure is early sprayed in intake port injection or cylinder introduces cylinder, and Weak mixture is formed in cylinder, the high pressure before top dead centre
Spray the Weak mixture of a small amount of or micro diesel oil ignited methanol and air.
Using waste heat from tail gas of internal combustion engine, methanol fuel is reformed online or cracking alcohol hydrogen is (comprising hydrogen, titanium dioxide
Carbon, vapor and methanol steam, main component are hydrogen), then gas is introduced by the way of intake port injection or in-cylinder direct-jet
Cylinder, the internal combustion engine also with a kind of mode of methanol fuel, suitable for spark ignition and compression ignition.
When using methanol fuel in the stationary electric power plant use of large-diameter (such as: cylinder diameter is greater than 200mm) or marine engines,
In order to reduce flame travel, avoid pinking, tissue burns nearly all by the way of diesel oil ignited.But using this
Kind mode, brings some problems: 1) needing two fuel tanks, increase cost and space requirement；2) it needs to be equipped with diesel oil automatically controlled
High-pressure common-rail injection system increases cost；3) use of diesel oil can generate a certain amount of granular material discharged.
On the other hand, using the igniting chamber of small volume as ignition energy amplifying device, it is suitable to be formed in the igniting chamber
The gaseous mixture (such as: the gaseous mixture of approximate stoichiometry ratio) of igniting is simultaneously lighted a fire in advance, and burning forms turbulent flame jet stream and lights master
Burn indoor Weak mixture, is that igniting reliability and rate of flame propagation can be improved, to which to widen internal combustion engine thin in one kind
Knock limit and the burning tissues method for significantly improving engine performance.This method, using natural gas as the internal combustion engine of fuel
In obtained more application.
Currently, using methanol/alcohol hydrogen as fuel, using ignition chamber type flame jet sparking mode internal-combustion engine technology scheme not
It appears in the newspapers.
Summary of the invention
The present invention provides a kind of burning tissues method and its application of methanol/alcohol hydrogen-fueled internal combustion engine, it is intended to use first
The internal combustion engine of alcohol fuel, especially cylinder diameter are greater than the methanol fuel internal combustion engine of 200mm, provide it is a kind of only need to supply methanol it is single
This method is applied to internal combustion engine, relative to existing diesel oil ignited burning tissues method and skill by the burning tissues method of fuel
Art can be improved the thermal efficiency, reduce and discharge and reduce production and operation cost.
In order to solve the above technical problems, the specific technical solution that the present invention uses is as follows.
A kind of burning tissues method of methanol/alcohol hydrogen-fueled internal combustion engine, it is characterised in that:
The method of the present invention is suitable for the internal combustion engine with igniting chamber.
It is cold-started operating condition in internal combustion engine, is all formed using methanol single-fuel mode, in igniting chamber and main chamber approximate
The gaseous mixture of stoichiometric ratio, using equivalent proportion combustion system, and using setting in the indoor heater plug hot spot of igniting
Fiery room, it is ensured that reliable cold start-up；
Specifically be made of following step in other operating conditions using methanol/alcohol hydrogen fuel mode: step S1 utilizes the tail of internal combustion engine
The online catalytic pyrolysis of gas waste heat or catalytic reforming part methanol fuel produce alcohol hydrogen, and main component is hydrogen；Step S2, it is made
A part and methanol fuel of the alcohol hydrogen taken pass through air flue respectively or cylinder injection enters main chamber, form Weak mixture；
Step S3, another part alcohol hydrogen supply igniting chamber and form hydrogen-rich gaseous mixture in igniting chamber；Step S4 is lighted a fire using being mounted on
Indoor plug ignition lights the indoor hydrogen-rich gaseous mixture of igniting；Step S5, after indoor hydrogen-rich mixture combustion of lighting a fire,
Combustion product, combustion intermediate product free radical and part unburned mixture are sprayed into through the channel of connection igniting chamber and main chamber and are led
Combustion chamber forms the multiple spot turbulent flame jet initiation source of high energy, lights the Weak mixture of methanol and alcohol hydrogen in main chamber；
Step S6, in main chamber after the kindling of the Weak mixture of methanol and alcohol hydrogen, under the effect of igniting chamber turbulent flame jet disturbing type,
Quickly, it fully burns.
The methanol/alcohol hydrogen-fueled internal combustion engine refers to only supplying methanol single-fuel to internal combustion engine, and passes through online
Part methanol fuel is catalytically conveted to alcohol hydrogen by catalytic reforming or cat-cracker, then supplies methanol fuel and alcohol hydrogen jointly
It is given to the internal combustion engine for forming gaseous mixture with air in the combustion chamber of internal combustion engine and burning.In the alcohol hydrogen, the volume fraction of hydrogen
Greater than 65%.
The hydrogen-rich gaseous mixture formed in the igniting chamber, for excess air coefficient between 0.5 and 2.0, hydrogen is dense
Spend Weak mixture higher than the concentration of hydrogen in main chamber gaseous mixture by 80% or more, to be formed in the main chamber, excess
Air coefficient is between 1.5 and 5.0.
The calorific value of the alcohol hydrogen accounts for the 8%~40% of all fuel gross calorific values of circulation, the alcohol hydrogen for being supplied to igniting chamber
Calorific value accounts for the 1%~5% of all fuel gross calorific values of circulation.
A kind of burning tissues method of methanol/alcohol hydrogen-fueled internal combustion engine is applied in methanol fuel internal combustion engine.
At least one igniting chamber is set on the internal combustion engine, by least 1 channel between the igniting chamber and main chamber
Connection, igniting chamber total measurement (volume) account for the 1%~5% of clearance volume.
The online catalytic pyrolysis of methanol or catalytic reforming unit are installed, using waste heat from tail gas by part methanol on the internal combustion engine
Fuel catalytic is converted into alcohol hydrogen, and the volume fraction of hydrogen is greater than 65% in the alcohol hydrogen, and an alcohol hydrogen booster pump is arranged will be described
Alcohol storing hydrogen tank is imported after the pressurization of alcohol hydrogen, the igniting of internal combustion engine is then fed separately to by 2 circuits, valve and spraying system
Room and main chamber.
The internal combustion engine in cold start-up operating condition using the single combustion equivalent of methanol than burning operating mode, using being mounted on a little
Fiery indoor heater plug preheating igniting room, it is ensured that reliable ignition and starting；In other operating conditions, using methanol/alcohol hydrogen fuel mode,
Methanol fuel and alcohol hydrogen enter main chamber by way of air intake duct or cylinder injection respectively, form Weak mixture, igniting
Indoor individual injection alcohol hydrogen forms hydrogen-rich gaseous mixture, and using the indoor plug ignition of igniting is mounted on, forms the rapids of high energy
Filariasis flame jet initiation source, lights the indoor Weak mixture of main burning.
The excess air coefficient of Weak mixture is between 1.5 and 5.0 in main chamber, hydrogen-rich gaseous mixture in igniting chamber
Excess air coefficient between 0.5 and 2.0, density of hydrogen is than hydrogen in gaseous mixture in main chamber in the igniting chamber
Concentration is high by 80% or more.
The compression ratio of the internal combustion engine is more than or equal to 14.
The present invention has beneficial effect.The present invention is greater than the methanol fuel internal-combustion engine technology phase of 200mm with existing cylinder diameter
Than that can increase excess air coefficient, widen the lean burn boundary of internal combustion engine, improve the burning and discharge of internal combustion engine, and drop
Low production or repacking cost.A cylinder diameter be 210mm diesel engine on reequip experiments have shown that, the thermal efficiency increase by 4%, nitrogen oxidation
Object discharge reduces by 85%, granular material discharged reduction by 95%.
1) present invention forms hydrogen-rich gaseous mixture due to being independently supplied alcohol hydrogen fuel in igniting chamber in igniting chamber, flammable
Boundary is wider, therefore indoor igniting reliability of lighting a fire is improved, and the cyclical variations of internal combustion engine reduce；2) laminar flow of hydrogen
Flame rate is high, can accelerate the indoor flame mechanism of igniting, quickly form the turbulent flame jet stream of high-energy, can both play a little
The indoor leaner gaseous mixture of main burning is lighted in the effect of fiery energy amplifier, and jet stream is caused strong in main chamber
Turbulent perturbation can promote the indoor flame mechanism of main burning again, and then improve the efficiency of internal combustion engine；3) due in main chamber
Part alcohol hydrogen is supplied, the fuel of hydrogen increases the indoor rate of flame propagation of main burning, improves the thermal efficiency, and also
The lean burn limit can be expanded, bigger excess air coefficient can be used when necessary, further the raising thermal efficiency；4) cylinder
Contain suitable hydrogen in interior gaseous mixture, accelerate in-cylinder combustion process, improve anti-knock properties, higher compression ratio can be used, from
And improve engine thermal efficiency；5) do not need it is diesel oil ignited, be greatly reduced even be eliminated it is granular material discharged；6) methanol fuel is urged
Change and reform or catalytic pyrolysis produces alcohol hydrogen process, absorb the heat of partial tail gas, the calorific value that contains fuel increases, can also be into
One step improves engine system efficiency.
The online catalytic pyrolysis of methanol or catalytic reforming unit are installed, using waste heat from tail gas by part first on inventive combustion engine
Alcohol fuel is catalytically conveted to alcohol hydrogen, and the volume fraction of hydrogen is greater than 65% in the alcohol hydrogen, and an alcohol hydrogen booster pump is arranged by institute
Alcohol storing hydrogen tank is imported after stating the pressurization of alcohol hydrogen, the point of internal combustion engine is then fed separately to by 2 circuits, valve and spraying system
Fiery room and main chamber.
Inventive combustion engine is burnt operating mode in cold start-up operating condition using methanol single-fuel equivalent proportion, using being mounted on
Indoor heater plug of lighting a fire heats igniting chamber, it is ensured that reliable ignition and starting；In other operating conditions, using methanol/alcohol hydrogen fuel mould
Formula, methanol fuel and alcohol hydrogen enter main chamber by way of air intake duct or cylinder injection respectively, form Weak mixture, point
Fiery interior individual injection alcohol hydrogen forms hydrogen-rich gaseous mixture, and using the indoor plug ignition of igniting is mounted on, forms high energy
The indoor Weak mixture of main burning is lighted in turbulent flame jet initiation source.
Methanol fuel nozzle and alcohol hydrogen main burner are provided in the air intake duct or cylinder of the internal combustion engine, for rushing in air inlet
Journey or compression stroke early stage by methanol and alcohol hydrogen introducing cylinder, form Weak mixture.Weak mixture in the main chamber
Excess air coefficient between 1.5 and 5.0.When using intake port injection, time for spraying will after exhaust valve closing,
Preferred time for spraying is 280 °C of A~240 °C A before compression top center；When using in-cylinder direct-jet, sprayed in early days using in cylinder
Strategy, can not only use lower injection pressure to reduce cost, but also there is the sufficient time to be mixed, when preferred injection
It carves as 180 °C of A~150 °C A before top dead centre.
The fuel supply of igniting chamber includes two parts: first part is by main chamber in compression stroke through interface channel
Into the methanol and alcohol hydrogen of igniting chamber, formed and the essentially identical Weak mixture of main chamber concentration in igniting chamber；Second
Part is the alcohol hydrogen being independently supplied from indoor alcohol hydrogen enriching nozzle of lighting a fire is arranged in igniting chamber, plays in enriching igniting chamber and mixes
The effect for closing gas, makes to ultimately form the gaseous mixture rich in hydrogen in igniting chamber, density of hydrogen is than in gaseous mixture in main chamber
The concentration of hydrogen is high by 80% or more, and excess air coefficient is between 0.5 and 2.0.
Due to containing suitable hydrogen in cylinder in gaseous mixture, thinner gaseous mixture and flame turbulent flow can be used
Jet stream forms the incendiary source largely dispersed in cylinder and turbulent perturbation has facilitation to burning so that cylinder flame propagate away from
Increase from reduction, rate of flame propagation, these effects all have inhibiting effect to combustion knock.Higher pressure can thus be used
The compression ratio of contracting ratio, internal combustion engine is more than or equal to 14.
Detailed description of the invention
Fig. 1 is schematic diagram of the invention.
In figure: 1, main chamber, 2, air intake duct, 3, methanol spraying system, 4, alcohol hydrogen main injection system, 5, exhaust duct, 6,
Catalytic reforming methanol device, 7, alcohol hydrogen booster pump, 8, alcohol storing hydrogen tank, 9, igniting chamber, 10, alcohol hydrogen enriching spraying system, 11, fire
Hua Sai, 12, heater plug, 13, turbulent flame jet stream, 14, methanol fuel tank.
Specific embodiment
Further details of the technical solution of the present invention in the following with reference to the drawings and specific embodiments.
Fig. 1 be according to the present invention provided by method, reequiped on the basis of cylinder diameter is the medium seed diesel engine of 210mm
Methanol/alcohol hydrogen-fueled internal combustion engine schematic diagram.As shown in Figure 1, having installed methanol spraying system additional in medium seed diesel engine air intake duct 2
3 and alcohol hydrogen main injection system 4, igniting chamber 9 and alcohol hydrogen enriching spraying system 10 are arranged on cylinder cap, are mounted in igniting chamber 9
Spark plug 11 and heater plug 12.Methanol fuel tank 14 supplies methanol combustion to methanol spraying system 3 and catalytic reforming methanol device 6
Material, the alcohol hydrogen are produced using the partial tail gas waste heat in exhaust duct 5 by catalytic reforming methanol device 6, are mentioned through alcohol hydrogen booster pump 7
High pressure, it is ensured that form necessary injection pressure difference between alcohol hydrogen supply pressure and air inlet pipeline, then connect alcohol storing hydrogen tank
8。
Operating condition is cold-started in the internal combustion engine, it is preferable that is preheated using heater plug 12 to igniting chamber 9, it is ensured that reliable
Igniting.Preferably, using methanol single fuel operation mode.Using methanol spraying system 3 to intake port injection methanol fuel,
The gaseous mixture of approximate stoichiometry ratio is formed in main chamber 1 and igniting chamber 9；Before compression stroke top dead centre, by being arranged in
Spark plug 11 in igniting chamber 9 lights the methanol gaseous mixture for indoor approximate stoichiometry ratio of lighting a fire；Gaseous mixture in igniting chamber 9
After burning, turbulent flame jet stream 13 is formed, main chamber 1 is injected into, lights the gaseous mixture in main burning, and promote main burning
Indoor gaseous mixture quickly fully burns, and realizes reliable cold start-up.
It is cold-started in operation very short time in the internal combustion engine, delivery temperature reaches the work of catalytic reforming methanol device 6
Temperature, the device start with waste heat from tail gas and carry out catalytic reforming to methanol, produce alcohol hydrogen fuel, the alcohol hydrogen fuel it is main
Ingredient is hydrogen, and content is greater than 65%.Alcohol hydrogen fuel through booster pump 7 pressurization after, into alcohol storing hydrogen tank 8, internal combustion engine start with
Methanol/alcohol hydrogen fuel mode work.
When internal combustion engine is with methanol/alcohol hydrogen fuel mode work, in the induction stroke of the internal combustion engine, sprayed by methanol
System 3 sprays methanol fuel, sprays alcohol hydrogen fuel by alcohol hydrogen main injection system 4, methanol and alcohol hydrogen fuel are in air intake duct 2
Air enters cylinder, forms homogeneous lean gaseous mixture in main chamber and igniting chamber, excess air coefficient is between 1.5 and 5.0
Between.Later period or compression stroke early stage in the intake stroke are sprayed suitable by alcohol hydrogen enriching spraying system 10 into igniting chamber 9
Alcohol hydrogen fuel is measured, is mixed with the Weak mixture for entering igniting chamber 9 from main chamber 1, the hydrogen-rich of approximate stoichiometry ratio is formed
Gaseous mixture.These hydrogen-rich gaseous mixtures are lighted before top dead centre by the spark plug 11 being mounted in igniting chamber 9, and conflagration, are released
Thermal discharge improves the gas pressure in igniting chamber 9, promotes the high-temperature combustion product and a small amount of combustion intermediate product in igniting chamber 9
Free radical and unburned mixture are injected into main chamber 1 at a relatively high speed, form high temperature turbulent flame jet 13, quickly light
Weak mixture in main chamber 1, and quickly fully burn under the great turbulence level perturbation action of jet stream excitation.
A kind of burning tissues method of methanol/alcohol hydrogen-fueled internal combustion engine described in this example is in 210mm in a cylinder diameter
Application in combustion engine due to only needing a kind of fuel tank, and is not needed compared to the combustion method of diesel oil ignited methanol
Diesel oil Electrocontrolled high-pressure spraying system is configured, thus significantly reduces production cost；Due to turbulent perturbation strong in main chamber,
Burn rate is fast, thus the thermal efficiency improves；Again due in main chamber happens is that the low-temperature burning of Weak mixture, thus it is interior
The nitrogen oxides of combustion engine and granular material discharged extremely low, current institute can be met by not needing nitrogen oxides and particulate matter after-treatment device
There is the limitation of the discharged nitrous oxides for engine of boat and ship or stationary electric power plant engine.Its resultant effect is, compared to former bavin
Oil machine, the thermal efficiency increase by 4%, and discharged nitrous oxides reduce by 85%, granular material discharged reduction by 95%.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of methanol/alcohol hydrogen-fueled internal combustion engine burning tissues method, which is characterized in that this method is suitable for igniting chamber
Internal combustion engine, comprising:
It is cold-started operating condition in internal combustion engine, using methanol single-fuel mode, igniting chamber and main chamber all form approximate chemical meter
The gaseous mixture for measuring ratio, using equivalent proportion combustion system, and using setting in the igniting indoor heater plug preheating igniting room, really
Protect reliable cold start-up；
Specifically be made of following step in other operating conditions using methanol/alcohol hydrogen fuel mode: step S1 utilizes the tail of internal combustion engine
The online catalytic pyrolysis of gas waste heat or catalytic reforming part methanol fuel produce alcohol hydrogen, and main component is hydrogen；Step S2, it is made
A part and methanol fuel of the alcohol hydrogen taken pass through air flue respectively or cylinder injection enters main chamber, form Weak mixture；
Step S3, another part alcohol hydrogen supply igniting chamber and form hydrogen-rich gaseous mixture in igniting chamber；Step S4 is lighted a fire using being mounted on
Indoor plug ignition lights the indoor hydrogen-rich gaseous mixture of igniting；Step S5, after indoor hydrogen-rich mixture combustion of lighting a fire,
Combustion product, combustion intermediate product free radical and part unburned mixture are sprayed into through the channel of connection igniting chamber and main chamber and are led
Combustion chamber forms the multiple spot turbulent flame jet initiation source of high energy, lights the Weak mixture of methanol and alcohol hydrogen in main chamber；
Step S6, in main chamber after the kindling of the Weak mixture of methanol and alcohol hydrogen, under the effect of igniting chamber turbulent flame jet disturbing type,
Quickly, it fully burns.
2. a kind of burning tissues method of methanol/alcohol hydrogen-fueled internal combustion engine according to claim 1, it is characterised in that: institute
It states in alcohol hydrogen, the volume fraction of hydrogen is greater than 65%.
3. a kind of burning tissues method of methanol/alcohol hydrogen-fueled internal combustion engine according to claim 1, it is characterised in that: institute
The hydrogen-rich gaseous mixture formed in igniting chamber is stated, for excess air coefficient between 0.5 and 2.0, density of hydrogen compares main burning
The concentration of hydrogen is high by 80% or more in the gaseous mixture of room, and the Weak mixture formed in the main chamber, excess air coefficient is situated between
Between 1.5 and 5.0.
4. a kind of burning tissues method of methanol/alcohol hydrogen-fueled internal combustion engine according to claim 1, it is characterised in that: institute
The calorific value for stating alcohol hydrogen accounts for the 8%~40% of all fuel gross calorific values of circulation, and the calorific value of the alcohol hydrogen for being supplied to igniting chamber accounts for circulation
The 1%~5% of all fuel gross calorific values.
5. a kind of application of methanol/alcohol hydrogen-fueled internal combustion engine burning tissues method, it is characterised in that: will be in claim 1-4
Any one is applied in methanol fuel internal combustion engine.
6. a kind of application of methanol/alcohol hydrogen-fueled internal combustion engine burning tissues method, feature exist according to claim 5
In: at least one igniting chamber is set on the internal combustion engine, is connected between the igniting chamber and main chamber by least 1 channel,
Igniting chamber total measurement (volume) accounts for the 1%~5% of clearance volume.
7. a kind of application of methanol/alcohol hydrogen-fueled internal combustion engine burning tissues method, feature exist according to claim 5
In: the online catalytic pyrolysis of methanol or catalytic reforming unit are installed, using waste heat from tail gas by part methanol fuel on the internal combustion engine
It is catalytically conveted to alcohol hydrogen, the volume fraction of hydrogen is greater than 65% in the alcohol hydrogen, and an alcohol hydrogen booster pump is arranged by the alcohol hydrogen
After pressurization import alcohol storing hydrogen tank, then by 2 circuits, valve and spraying system be fed separately to internal combustion engine igniting chamber and
Main chamber.
8. a kind of application of methanol/alcohol hydrogen-fueled internal combustion engine burning tissues method, feature exist according to claim 5
In: the internal combustion engine in cold start-up operating condition using the single combustion equivalent of methanol than burning operating mode, using being mounted on igniting chamber
Interior heater plug preheating igniting room, it is ensured that reliable ignition and starting；In other operating conditions, using methanol/alcohol hydrogen fuel mode, methanol
Fuel and alcohol hydrogen enter main chamber by way of air intake duct or cylinder injection respectively, form Weak mixture, in igniting chamber
Individual injection alcohol hydrogen forms hydrogen-rich gaseous mixture, and using the indoor plug ignition of igniting is mounted on, forms the turbulent flow fire of high energy
The indoor Weak mixture of main burning is lighted in flame jet initiation source.
9. a kind of application of methanol/alcohol hydrogen-fueled internal combustion engine burning tissues method, feature exist according to claim 5
In: the excess air coefficient of Weak mixture is between 1.5 and 5.0 in main chamber, the mistake of hydrogen-rich gaseous mixture in igniting chamber
Air coefficient is measured between 0.5 and 2.0, concentration of the density of hydrogen than hydrogen in gaseous mixture in main chamber in the igniting chamber
It is high by 80% or more.
10. a kind of application of methanol/alcohol hydrogen-fueled internal combustion engine burning tissues method, feature exist according to claim 5
In: the compression ratio of the internal combustion engine is more than or equal to 14.
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| CN110107418A (en) * | 2019-04-23 | 2019-08-09 | 上海交通大学 | Double fuel bump combustion chamber system |
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| CN109630336A (en) * | 2019-01-22 | 2019-04-16 | 浙江吉利控股集团有限公司 | Ignition system and vehicle for methanol engine |
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| CN113669183A (en) * | 2021-08-16 | 2021-11-19 | 大连理工大学 | Efficient low-carbon-free flexible fuel combustion system |
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