CN103883387B - A kind of burning method for organizing and a kind of combustion system - Google Patents
A kind of burning method for organizing and a kind of combustion system Download PDFInfo
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- CN103883387B CN103883387B CN201410115286.8A CN201410115286A CN103883387B CN 103883387 B CN103883387 B CN 103883387B CN 201410115286 A CN201410115286 A CN 201410115286A CN 103883387 B CN103883387 B CN 103883387B
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- gaseous mixture
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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
Abstract
The invention provides a kind of burning method for organizing and a kind of combustion system, comprise and around the spark plug of engine, form high energy density fuel gaseous mixture in inner cylinder direct injection mode, the excess air coefficient of described high energy density fuel gaseous mixture is less than 1, and described high energy density fuel low heat value is more than or equal to 44000kJ/kg; Around the cylinder wall of engine, form antiknock gasoline gaseous mixture in intake port injection mode, the excess air coefficient of described antiknock gasoline gaseous mixture is greater than 1, octane number is more than or equal to 95, and described high energy density fuel gaseous mixture and described antiknock gasoline gaseous mixture form layering equivalent proportion gaseous mixture at engine air cylinder interior. The present invention can effectively suppress the phenomenon of detonation of high compression engine, thereby provides important support for engine energy-saving reduces discharging, and it is low to realize cost, can the technology upgrading of available engine product be provided and be provided powerful support for, and industrialization prospect is good.
Description
Technical field
The present invention relates to technical field of internal combustion engines, relate in particular to a kind of burning method for organizing and oneCombustion system.
Background technology
Automobile industry is the important component part of China's economic structure, and most of passenger car all withGasoline engine is as power resources. Direct spray petrol engine in cylinder (GasolineDirectInjection, GDI)There is the ability of significantly energy-saving and emission-reduction than conventional gasoline machine, become gasoline engine developmentMain flow, lightweight is directly sprayed in supercharging becomes the industrialization main technological route of GDI gasoline engine.
But for adopting supercharging directly to spray the GDI gasoline engine of Lightweight Technology, its thermal efficiency stillBe less than diesel engine, one of main reason is the raising that pinking limits its compression ratio, therefore effectiveSuppressing the pinking of gasoline engine and improving compression ratio becomes and realizes the more important way of efficient burning of gasoline engineFootpath. Research shows, mixture strength is near chemically correct fuel time, the most easily occur spontaneous combustion fromAnd initiation pinking, dense or rare gaseous mixture can play inhibitory action to pinking. In existing skillIn the actual vehicular engine burning of art, often adopt air-fuel mixture enrichment and postpone the angle of ignition and press downPinking processed, after the combustion phase of this method leans on, oil consumption is high, has greatly lost fuel economy.
Summary of the invention
(1) technical problem that will solve
The invention provides a kind of burning method for organizing and a kind of combustion system, to solve prior artIn cannot under chemically correct fuel, suppress cost-effectively the technical problem of pinking.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of burning method for organizing, comprising:
Around the spark plug of engine, form high energy density fuel in inner cylinder direct injection modeGaseous mixture, the excess air coefficient of described high energy density fuel gaseous mixture is less than 1, described high energyMetric density lower calorific value of fuel is more than or equal to 44000kJ/kg;
Around the cylinder wall of engine, form antiknock gasoline mixes in intake port injection modeGas, the excess air coefficient of described antiknock gasoline gaseous mixture is greater than 1, octane number be greater than or etc.In 95, described high energy density fuel gaseous mixture and described antiknock gasoline gaseous mixture are startingMachine cylinder interior forms layering equivalent proportion gaseous mixture.
Further,
Described antiknock gasoline gaseous mixture is methyl alcohol, ethanol, propyl alcohol, butanols, methane, secondOne or more in alkane, propane.
Further,
Described high energy density fuel is gasoline.
Further, described method also comprises:
By regulating described high energy density fuel gaseous mixture and described antiknock gasoline gaseous mixtureRatio, pinking effect is realized to inhibition in various degree.
Further,
Described antiknock gasoline gaseous mixture shared mass fraction in cylinder is: 40%～70%.
On the other hand, the present invention also provides a kind of combustion system, comprising:
In-cylinder direct-jet device, in inner cylinder direct injection mode around the spark plug of engineForm high energy density fuel gaseous mixture, the excess air of described high energy density fuel gaseous mixtureCoefficient is less than 1, and described high energy density fuel low heat value is more than or equal to 44000kJ/kg;
Intake port injection device, in intake port injection mode around the cylinder wall of engineForm antiknock gasoline gaseous mixture, the excess air coefficient of described antiknock gasoline gaseous mixtureBe greater than 1, octane number is more than or equal to 95, makes described high energy density fuel gaseous mixture and instituteState antiknock gasoline gaseous mixture and form layering equivalent proportion gaseous mixture at engine air cylinder interior;
The combustion mode of described system is spark ignition layering equivalent proportion gaseous mixture.
Further,
Described antiknock gasoline gaseous mixture is methyl alcohol, ethanol, propyl alcohol, butanols, methane, secondOne or more in alkane, propane.
Further,
Described high energy density fuel is gasoline.
Further, described system also comprises:
Control set for adjusting, respectively with described in-cylinder direct-jet device and described intake port injection deviceBe connected, for passing through to regulate described high energy density fuel gaseous mixture and described antiknock gasolineThe ratio of gaseous mixture, realizes inhibition in various degree to pinking effect.
Further,
Described antiknock gasoline gaseous mixture shared mass fraction in cylinder is: 40%～70%.
(3) beneficial effect
Visible, in a kind of burning method for organizing provided by the invention and a kind of combustion system, logicalCross the partially dense high energy density fuel gaseous mixture of formation around spark plug, shape around cylinder wallBecome rare antiknock gasoline gaseous mixture, overall as layering equivalent proportion gaseous mixture to form in cylinder,Thereby realize the high-efficiency cleaning burning under high compression ratio. Due to cylinder wall rare higher octane aroundValue fuel mixture anti-knock properties are good and energy density is little, can realize effective inhibition pinking; SimultaneouslyHigh-energy-density gaseous mixture partially dense around spark plug can accelerated combustion suppress pinking, more can be trueFast response characteristic and the good dynamic property of protecting engine, therefore, the present invention can effectively press downThe phenomenon of detonation of high compression engine processed, thus for reducing discharging, engine energy-saving provides important support.
And of the present invention to realize cost low, can be to the technology upgrading of available engine productProvide and provide powerful support for, industrialization prospect is good.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, belowTo the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, aobviousAnd easy insight, the accompanying drawing in the following describes is some embodiments of the present invention, general for this areaLogical technical staff, is not paying under the prerequisite of creative work, can also be attached according to theseFigure obtains other accompanying drawing.
Fig. 1 is the basic procedure schematic diagram of embodiment of the present invention burning method for organizing;
Fig. 2 is the basic structure schematic diagram of embodiment of the present invention combustion system;
Fig. 3 is a kind of preferred structure schematic diagram of embodiment of the present invention combustion system;
Fig. 4 is the combustion system implementation procedure schematic diagram of the embodiment of the present invention 1;
Fig. 5 is the combustion system structural representation of the embodiment of the present invention 1.
Detailed description of the invention
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, will tie belowClose the accompanying drawing in the embodiment of the present invention, to the technical scheme in the embodiment of the present invention carry out clear,Intactly describe, obviously, described embodiment is the present invention's part embodiment, instead ofWhole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art are not havingMake the every other embodiment obtaining under creative work prerequisite, all belong to the present invention's protectionScope.
First the embodiment of the present invention provides a kind of burning method for organizing, referring to Fig. 1, comprising:
Step 101: form high-energy in inner cylinder direct injection mode around the spark plug of engineDensity fuel mixture, the excess air coefficient of described high energy density fuel gaseous mixture is less than 1,Described high energy density fuel low heat value is more than or equal to 44000kJ/kg.
Step 102: form high-octane rating in intake port injection mode around the cylinder wall of engineFuel mixture, the excess air coefficient of described antiknock gasoline gaseous mixture is greater than 1, octane numberBe more than or equal to 95, described high energy density fuel gaseous mixture and described antiknock gasoline mixGas forms layering equivalent proportion gaseous mixture at engine air cylinder interior.
Visible, in the one that provides in embodiment of the present invention burning method for organizing, by sparkPlug forms partially dense high energy density fuel gaseous mixture around, forms rare height around cylinder wallOctane fuel gaseous mixture, overall as layering equivalent proportion gaseous mixture to form in cylinder, thus realizeHigh-efficiency cleaning burning under high compression ratio. Because cylinder wall rare antiknock gasoline is around mixedClose that gas anti-knock properties are good and energy density is little, can realize effective inhibition pinking; Spark plug week simultaneouslyEnclosing partially dense high-energy-density gaseous mixture can accelerated combustion suppress pinking, more can guarantee engineFast response characteristic and good dynamic property, therefore, the embodiment of the present invention can effectively suppressThe phenomenon of detonation of high compression engine, thus for reducing discharging, engine energy-saving provides important support.
Preferably, the octane number of antiknock gasoline gaseous mixture can be greater than 95, can be as firstThe high-octane rating alternative fuel such as alcohol, ethanol, propyl alcohol, butanols, methane, ethane, propane.
Preferably, high energy density fuel can be relative antiknock gasoline energy densityHigher gas, the engine fuels such as such as gasoline.
Preferably, can be by on-line control high energy density fuel gaseous mixture and high-octane rating combustionThe injection proportion of material gaseous mixture, to realize inhibition pinking effect in various degree and to promote pinking lineLoad effect: when improving the octane number of antiknock gasoline, or improve higher octane in air intake ductWhile being worth the injection proportion of fuel mixture, can playing and suppress better pinking and promote pinking lineThe effect of load. Wherein, the antiknock gasoline gaseous mixture adopting shared matter in cylinderAmount mark can be: 40%～70%.
The embodiment of the present invention also provides a kind of combustion system, referring to Fig. 2, comprising:
In-cylinder direct-jet device 201, for the spark plug week at engine in inner cylinder direct injection modeEnclose and form high energy density fuel gaseous mixture, the excessive sky of described high energy density fuel gaseous mixtureGas coefficient is less than 1, and described high energy density fuel low heat value is more than or equal to 44000kJ/kg;
Intake port injection device 202, for the cylinder wall week at engine in intake port injection modeEnclose and form antiknock gasoline gaseous mixture, the excess air system of described antiknock gasoline gaseous mixtureNumber be greater than 1, octane number is more than or equal to 95, make described high energy density fuel gaseous mixture andDescribed antiknock gasoline gaseous mixture forms layering equivalent proportion gaseous mixture at engine air cylinder interior;
The combustion mode of described system is spark ignition layering equivalent proportion gaseous mixture.
Preferably, the octane number of antiknock gasoline gaseous mixture can be greater than 95, can be as firstThe high-octane rating alternative fuel such as alcohol, ethanol, propyl alcohol, butanols, methane, ethane, propane.
Preferably, high energy density fuel can be gasoline.
Preferably, system can also comprise: control set for adjusting 301, referring to Fig. 3, respectively withIn-cylinder direct-jet device 201 is connected with intake port injection device 202, for passing through to regulate high-energyThe ratio of density fuel mixture and antiknock gasoline gaseous mixture, to realize not pinking effectWith the inhibition of degree.
Preferably, antiknock gasoline gaseous mixture shared mass fraction in cylinder can be:40%～70%。
Embodiment 1:
The embodiment of the present invention 1 provides a kind of combustion system, to describe the embodiment of the present invention in detailSpecific implementation process, referring to Fig. 4:
Step 401: install intake port injection device 202 on high compression ratio in-cylinder direct fuel-injection engine additionalSpray antiknock gasoline gaseous mixture.
In the present embodiment 1, what adopt is high compression ratio (11～14) in-cylinder direct fuel-injection engine,Engine interior includes in-cylinder direct-jet device 201, on the air intake duct 1 of this engine, installs one additionalCover intake port injection device 202, is shown in Fig. 5. In the time of engine running, utilize air intake duct 1 to sprayDevice 202 sprays antiknock gasoline gaseous mixture 2 at air intake duct 1, comprises methyl alcohol, ethanol, firstThe high-octane rating alternative fuel such as alkane.
Step 402: utilize in-cylinder direct-jet device to spray high energy density fuel gaseous mixture, form and divideLayer equivalent proportion gaseous mixture.
In this step, cylinder interior is sprayed high energy in compression stroke by in-cylinder direct-jet device 201Metric density fuel mixture 3, the engine fuel such as high energy density fuel is gasoline, is gathered in and sends outAround motivation spark plug 4. Before engine ignition, cylinder wall 5 forms rare higher octane aroundValue fuel mixture 2, spark plug 2 forms partially dense high energy density fuel gaseous mixture 3 around,Whole cylinder interior forms layering equivalent proportion gaseous mixture.
Step 403: carry out engine ignition.
After layering equivalent proportion gaseous mixture forms, mix by spark ignition layering equivalent proportionThe combustion mode of gas is carried out engine ignition, and can regulate two by control set for adjusting 301The injection proportion of planting gas realizes inhibition pinking effect in various degree and promotes pinking specific electric loadEffect, and can significantly reduce oil consumption with energy-conservation, after burning, gas is discharged by exhaust duct 6.
For example, spray methyl alcohol with air intake duct 1, cylinder injection gasoline is example, in the quality of methyl alcoholMark is, in 54% situation, than the former machine of GDI gasoline engine, can realize pinking specific electric loadExpand 11.7%, wait calorific value specific fuel consumption to reduce by 14.1% effect simultaneously.
In embodiments of the present invention, can adopt three-way catalyst to carry out exhaust aftertreatment, reachThe 6th grade of discharge standard in Europe. The engine production cost of the embodiment of the present invention is almost constant, butThat the use cost that energy-saving and emission-reduction realize can significantly reduce.
Visible, the embodiment of the present invention at least has following beneficial effect:
In the one burning method for organizing and a kind of combustion system providing in the embodiment of the present invention, logicalCross the partially dense high energy density fuel gaseous mixture of formation around spark plug, shape around cylinder wallBecome rare antiknock gasoline gaseous mixture, overall as layering equivalent proportion gaseous mixture to form in cylinder,Thereby realize the high-efficiency cleaning burning under high compression ratio. Due to cylinder wall rare higher octane aroundValue fuel mixture anti-knock properties are good and energy density is little, can realize effective inhibition pinking; SimultaneouslyHigh-energy-density gaseous mixture partially dense around spark plug can accelerated combustion suppress pinking, more can be trueFast response characteristic and the good dynamic property of protecting engine, therefore, the embodiment of the present invention canEffectively suppress the phenomenon of detonation of high compression engine, thereby provide heavy for engine energy-saving reduces dischargingSupport.
And, the embodiment of the present invention to realize cost low, can be to the skill of available engine productArt upgrading provides and provides powerful support for, and industrialization prospect is good.
Finally it should be noted that: above embodiment is only in order to technical scheme of the present invention to be described, andNon-to its restriction; Although the present invention is had been described in detail with reference to previous embodiment, abilityThe those of ordinary skill in territory is to be understood that: the skill that it still can be recorded aforementioned each embodimentArt scheme is modified, or part technical characterictic is wherein equal to replacement; And these are repaiiedChange or replace, not making the essence of appropriate technical solution depart from various embodiments of the present invention technical sideThe spirit and scope of case.
Claims (10)
1. a burning method for organizing, is characterized in that, comprising:
Around the spark plug of engine, form high energy density fuel in inner cylinder direct injection modeGaseous mixture, the excess air coefficient of described high energy density fuel gaseous mixture is less than 1, described high energyMetric density lower calorific value of fuel is more than or equal to 44000kJ/kg;
Around the cylinder wall of engine, form antiknock gasoline mixes in intake port injection modeGas, the excess air coefficient of described antiknock gasoline gaseous mixture is greater than 1, octane number be greater than or etc.In 95, described high energy density fuel gaseous mixture and described antiknock gasoline gaseous mixture are startingMachine cylinder interior forms layering equivalent proportion gaseous mixture.
2. burning method for organizing according to claim 1, is characterized in that:
Described antiknock gasoline gaseous mixture is methyl alcohol, ethanol, propyl alcohol, butanols, methane, secondOne or more in alkane, propane.
3. burning method for organizing according to claim 1, is characterized in that:
Described high energy density fuel is gasoline.
4. according to the burning method for organizing described in any one in claims 1 to 3, its feature existsIn, described method also comprises:
By regulating described high energy density fuel gaseous mixture and described antiknock gasoline gaseous mixtureRatio, pinking effect is realized to inhibition in various degree.
5. burning method for organizing according to claim 4, is characterized in that:
Described antiknock gasoline gaseous mixture shared mass fraction in cylinder is: 40%～70%.
6. a combustion system, is characterized in that, comprising:
In-cylinder direct-jet device, in inner cylinder direct injection mode around the spark plug of engineForm high energy density fuel gaseous mixture, the excess air of described high energy density fuel gaseous mixtureCoefficient is less than 1, and described high energy density fuel low heat value is more than or equal to 44000kJ/kg;
Intake port injection device, in intake port injection mode around the cylinder wall of engineForm antiknock gasoline gaseous mixture, the excess air coefficient of described antiknock gasoline gaseous mixtureBe greater than 1, octane number is more than or equal to 95, makes described high energy density fuel gaseous mixture and instituteState antiknock gasoline gaseous mixture and form layering equivalent proportion gaseous mixture at engine air cylinder interior;
The combustion mode of described system is spark ignition layering equivalent proportion gaseous mixture.
7. combustion system according to claim 6, is characterized in that:
Described antiknock gasoline gaseous mixture is methyl alcohol, ethanol, propyl alcohol, butanols, methane, secondOne or more in alkane, propane.
8. combustion system according to claim 6, is characterized in that:
Described high energy density fuel is gasoline.
9. according to the combustion system described in any one in claim 6-8, it is characterized in that instituteThe system of stating also comprises:
Control set for adjusting, respectively with described in-cylinder direct-jet device and described intake port injection deviceBe connected, for passing through to regulate described high energy density fuel gaseous mixture and described antiknock gasolineThe ratio of gaseous mixture, realizes inhibition in various degree to pinking effect.
10. combustion system according to claim 9, is characterized in that:
Described antiknock gasoline gaseous mixture shared mass fraction in cylinder is: 40%～70%.
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| CN201410115286.8A CN103883387B (en) | 2014-03-25 | 2014-03-25 | A kind of burning method for organizing and a kind of combustion system |
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| DE102015224145A1 (en) * | 2015-12-03 | 2017-06-08 | Robert Bosch Gmbh | Direct start of an internal combustion engine |
| CN105673281B (en) * | 2016-04-10 | 2018-05-08 | 北京工业大学 | In a kind of gas/liquid double fuel cylinder/cylinder outer pair of injection apparatus and control method |
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| JPH1061460A (en) * | 1996-08-15 | 1998-03-03 | Toyota Motor Corp | Control device of fuel gas internal combustion engine |
| JP5035088B2 (en) * | 2007-08-06 | 2012-09-26 | 日産自動車株式会社 | engine |
| CN101649785B (en) * | 2009-09-11 | 2012-08-15 | 北京工业大学 | Internal combustion engine with fuels being mixed and ignited on the spot and control method thereof |
| CN103061908B (en) * | 2012-12-21 | 2015-11-25 | 天津大学 | Flexible double fuel HPCC engine combustion, discharge control method and device |
| CN103225561A (en) * | 2013-04-16 | 2013-07-31 | 上海交通大学 | Strategy for switching spark ignition and homogeneous compression ignition modes of dual-fuel engine, and implementation device thereof |
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