CN104213976B - Natural gas engine combustion method and the Turbocharged Natural Gas Engine using this method - Google Patents
Natural gas engine combustion method and the Turbocharged Natural Gas Engine using this method Download PDFInfo
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- CN104213976B CN104213976B CN201410408370.9A CN201410408370A CN104213976B CN 104213976 B CN104213976 B CN 104213976B CN 201410408370 A CN201410408370 A CN 201410408370A CN 104213976 B CN104213976 B CN 104213976B
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 188
- 239000003345 natural gas Substances 0.000 title claims abstract description 99
- 238000009841 combustion method Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 83
- 229910001060 Gray iron Inorganic materials 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims abstract description 4
- 239000008246 gaseous mixture Substances 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000003502 gasoline Substances 0.000 claims description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000008450 motivation Effects 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 33
- 239000000567 combustion gas Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 37
- 238000012360 testing method Methods 0.000 description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A kind of Turbocharged Natural Gas Engine the present invention provides natural gas engine combustion method and using this method, natural gas fuel or other gaseous fuels using methane as main component.The engine includes gray iron, piston, toggle, gas handling system, exhaust system, gas burning system, ignition system, engine controller etc..The gas handling system and exhaust system are equipped with exhaust-driven turbo-charger exhaust-gas turbo charger, the exhaust-driven turbo-charger exhaust-gas turbo charger by turbine and compressor set into.The gas burning system includes gas injector, and the gas injector is installed in cylinder head or in inlet manifold, and combustion gas sprays into air intake duct by the gas injector.Turbocharged Natural Gas Engine provided by the present invention, can increase substantially the power performance and the thermal efficiency of natural gas engine with relatively low manufacture cost.
Description
Technical field
The present invention relates to technical field of engines, is specially a kind of natural gas engine combustion method and uses this method
Turbocharged Natural Gas Engine.
Background technology
It is dirty with increasingly severe exhaust that the development of automobile and prime mover industry result in increasing considerably for consumption of petroleum
Dye, so as to restrict economic development, endangers environmental and human health impacts.Theory and practice shows since natural gas octane number is high thus anti-
Quick-fried performance is good；Molecule C/Hratio it is low thus burn after CO2 discharge it is low；Combustion characteristics is good, therefore engine for combusting natural gas can be with
Liquid petroleum fuel is saved, reduces its tailpipe emission and carbon dioxide, improves city PM2.5 and reduces to Environment-Greenhouse
The contribution of effect, is conducive to energy-saving and environment-friendly
A kind of method of automobile natural gas fuel is gasoline-natural gas double-fuel technology at present.The technology can make automobile
Engine possesses while uses the ability of vapour oil and gas, i.e., automobile is loaded with two fuel supply systems of vapour oil and gas
System, the same engine of automobile using can optionally use gasoline or natural gas.In this case, engine charge is
Natural aspiration, natural gas is from air intake duct（Pipe）Into cylinder, since natural gas occupies the volume of inlet air so that engine fills
Gas efficiency is greatly lowered, and causes engine output torque and power drop 15% ~ 20%.In addition, gasoline-natural gas double-fuel hair
Motivation is designed by gasoline performance, and design parameter such as compression ratio and valve timing of engine etc. cannot most preferably embody naturally
The fuel characteristic of gas, the good advantage of natural gas anti-knock properties cannot give full play to, more preferably hot when causing engine for combusting natural gas
Efficiency（Fuel consumption rate）Potentiality cannot play.In addition, gasoline-natural gas vehicle by double fuels has 2 sets of fuel system at the same time so that
This kind of vehicle structure complexity, cost increase.
To solve from air intake duct（Or inlet manifold）The shortcomings that supply natural gas causes engine volumetric efficiency to reduce, have
People it is also proposed with higher pressure（10~20MPa）Natural gas is injected directly into the technological concept of cylinder.But this
A little concepts will face following problem in the application：First, in the big load of high engine speeds, it is difficult to be formed uniformly in cylinder
Gaseous mixture, causes engine power performance（Particularly maximum power）Decline；Second, reduced with the pressure of natural gas storage pot holding,
In order to ensure deliverability of gas, spray time beginning of natural gas injection and injection duration will therewith adjust, cause same
In-cylinder pressure and temperature of the engine in igniting are different under operating mode, and engine work is unreliable and there are problem；Third, will
Seeking natural gas air accumulator gas storage pressure, manufacture cost and the safety for greatly increasing air accumulator are hidden far above 20MPa general at present
Suffer from.
Meanwhile in order to reduce the fuel consumption rate of natural gas, people also use lean burn, i.e. engine suction is more than chemistry
The excess air of equivalent, this technology is in current dynamo engine and Medium or severe type, low-speed diesel engine（Engine speed<
3000 rpm）On have more application.But engine power can be caused using lean burn on high speed car engine
Performance further reduces；In addition, in order to meet stringenter motor vehicle exhaust emission regulation, it is necessary to closed using special nitrogen oxidation
Thing after-treatment device, causes vehicle structure more complicated, manufacture and operating cost increase.
The content of the invention
In view of the defects existing in the prior art, the present invention provides a kind of natural gas engine, high speed engine is solved（It is logical
It is commonly used for automobile power）Natural gas fuel or other gaseous fuels using methane as main component（Such as：Coal bed gas, shale
Gas and hydrocarbon hydrate gas etc.）When power performance（Moment of torsion and power）The technical problem low with the thermal efficiency.It is using the present invention
Technology can increase substantially the power performance and the thermal efficiency of above-mentioned engine with relatively low cost so that its power performance is notable
Power performance during more than the engine for combusting gasoline or diesel oil is horizontal, more efficiently utilizes natural gas and other methane gas
Body resource.
In order to solve the above technical problem, the present invention provides a kind of natural gas engine combustion method, including following step
Suddenly：
S1, natural gas are injected into engine inlets under the pressure of 0.2 ~ 0.9 MPa, are mixed, are gone forward side by side with air
Enter in cylinder, uniform air-natural gas gaseous mixture is further mixed to form with air；
S2, the gaseous mixture that excess air coefficient is 0.85 ~ 1.1, are 11.0 ~ 13.0 engine piston by compression ratio
Compression, in piston approaches top dead center, is lighted and is burnt by the spark that spark plug produces, gaseous mixture is by burning and expanding pusher
Piston do work, final vacuum discharge cylinder；
S3, exhaust enter the turbine of exhaust-driven turbo-charger exhaust-gas turbo charger by exhaust pipe, promote rotating turbine and drive is connected
Compressor.Then, exhaust enters ternary catalyzing unit and reacts, and finally exhaust is discharged into air by muffler.
Further, above-mentioned natural gas or other gases using methane as main component, including coal bed gas, page
Rock gas and hydrocarbon hydrate gas etc..
Further, using this method above-mentioned natural gas engine highest working speed at 4000~8000 revs/min
Clock, every cylinder displacement of engine（Swept volume）Less than or equal to 0.6 liter.
The present invention provides using as above-mentioned any one of them natural gas engine combustion method natural gas engine,
Above-mentioned natural gas engine includes gray iron, piston, toggle, gas handling system, exhaust system, gas burning system, point
Fiery system, engine controller etc.,
Above-mentioned gas handling system and exhaust system are equipped with exhaust-driven turbo-charger exhaust-gas turbo charger, and above-mentioned exhaust-driven turbo-charger exhaust-gas turbo charger is by turbine
With compressor set into above-mentioned turbine is connected with exhaust pipe, and above-mentioned compressor is connected with air inlet pipe, on above-mentioned exhaust pipe also
Equipped with lambda sensor；
Above-mentioned gas burning system includes gas injector, and above-mentioned gas injector is installed in cylinder head or in air inlet pipe,
Combustion gas sprays into air intake duct by above-mentioned gas injector.
Further, above-mentioned gas handling system further includes air cleaner, air throttle.
Further, above-mentioned gas burning system further includes pressure regulator valve, gas rail.
Further, the exhaust gas by-pass valve being connected with above-mentioned turbine is additionally provided with the exhaust pipe of above-mentioned exhaust system.
Further, ternary catalyzing unit and muffler, the front and rear row of above-mentioned ternary catalyzing unit are additionally provided with above-mentioned exhaust pipe
Oxygen sensor is all provided with tracheae, above-mentioned lambda sensor is connected by circuit with above-mentioned engine controller.
Further, cylinder head is equipped with spark plug, and each cylinder installs at least one spark plug.
Present invention also offers another natural gas engine, it is equipped with the natural gas engine described in any of the above-described
Outside all components, the charge air cooler in air inlet pipe is further included.
Compared with prior art, a kind of natural gas engine provided by the present invention, can greatly improve natural gas engine
The power performance and the thermal efficiency of machine.
Brief description of the drawings
Fig. 1 is the structural scheme of mechanism of Turbocharged Natural Gas Engine of the present invention.
Fig. 2 is the structural scheme of mechanism of the Turbocharged Natural Gas Engine of the invention with charge air cooler.
Fig. 3 is effective specific fuel consumption contrast test figure.
Fig. 4 is effective torque contrast test figure.
Fig. 5 is effective power contrast test figure.
Embodiment
Many details are elaborated in the following description in order to fully understand the present invention.But the present invention can be with
Much implement different from other manner described here, those skilled in the art can be in the situation without prejudice to intension of the present invention
Under do similar popularization, therefore the present invention is from the limitation of following public specific embodiment.
With reference to the accompanying drawings and examples, the embodiment of the present invention is described further.
Embodiment 1
Natural gas engine（Without charge air cooler）
Refer to Fig. 1, a kind of natural gas engine,
Natural gas engine includes gray iron 9, piston, toggle, gas handling system, exhaust system, combustion gas system
System, ignition system, engine controller 15 etc..
Gas handling system and exhaust system are equipped with exhaust-driven turbo-charger exhaust-gas turbo charger 2, and exhaust-driven turbo-charger exhaust-gas turbo charger 2 is by turbine 2b and pressure
Contracting machine 2a is formed, and turbine 2b is connected with exhaust pipe, and compressor 2a is connected with air inlet pipe 5, and oxygen is additionally provided with exhaust pipe 11
Sensor 14.
Gas burning system includes gas injector 8, and gas injector 8 is installed on cylinder cap 9 or in air inlet pipe 5, natural gas
Air intake duct is sprayed into by gas injector 8.
It is preferred that gas handling system further includes air cleaner 1, air throttle 4.Inlet air compresses laggard by compressor 2a
Enter cylinder, air throttle 4 is used to adjust the air inflow of engine so as to adjust the load of engine.
It is preferred that gas burning system further includes pressure regulator valve 6, gas rail 7.
It is preferred that the exhaust gas by-pass valve 12 being connected with turbine is additionally provided with the exhaust pipe 11 of exhaust system.
It is preferred that ternary catalyzing unit 13 and muffler 16 are additionally provided with exhaust pipe 11, the front and rear exhaust pipe of ternary catalyzing unit
On be all provided with oxygen sensor 14, lambda sensor 14 is connected by circuit with engine controller 15.
It is preferred that cylinder head is equipped with spark plug, each cylinder installs at least one spark plug.
Embodiment 2
A kind of natural gas engine（Band charge air cooler）
In conjunction with the embodiments 1, Fig. 2 is referred to, another kind natural gas engine provided by the invention, it is equipped with such as embodiment 1
Outside all components of the natural gas engine, charge air cooler 3 is further included, in such a scheme, charge air cooler 3 of the present invention will be into
The natural gas for entering engine is cooled down, and so contributes to further improve engine power performance.
Embodiment 3
Natural gas engine combustion method
Refer to Fig. 1, and in conjunction with the embodiments 1 and embodiment 2, the present invention provides a kind of natural gas engine burning side
Method, comprises the following steps：
S1, natural gas are injected into engine inlets under the pressure of 0.2 ~ 0.9 MPa, are mixed, are gone forward side by side with air
Enter in cylinder, uniform air-natural gas gaseous mixture is further mixed to form with air.
S2, the gaseous mixture that excess air coefficient is 0.85 ~ 1.1, are 11.0 ~ 13.0 engine piston by compression ratio
Compression, in piston approaches top dead center, is lighted and is burnt by the spark that spark plug produces, gaseous mixture is by burning and expanding pusher
Piston do work, final vacuum discharge cylinder.Engine is burnt using chemical equivalent mixing ratio, the excessive sky of gaseous mixture
Gas coefficient is 0.85~1.1, so as to using having in ripe and lower-cost ternary catalyzing unit processing engine exhaust
Evil component, to reach the requirement of Abgasgesetz.
S3, exhaust enter the turbine 2b of exhaust-driven turbo-charger exhaust-gas turbo charger 2 by exhaust pipe 11, promote turbine 2b rotations and band
Move connected compressor 2a.Then, exhaust enters ternary catalyzing unit 13, and finally exhaust is discharged into air by muffler.
Under some operating modes, portion discharge will not be by turbine 2b, but is directly entered three by exhaust gas by-pass valve 12
First catalyst converter 13.Pernicious gas carbon monoxide in being vented in ternary catalyzing unit 13（CO）, nitrogen oxides（NOx）, hydrocarbonization
Compound（HC）Carbon dioxide is converted to Deng after chemical reaction（CO2）And nitrogen（N2）Deng innocuous gas.In order to ensure ternary
Catalyst converter 13 works under higher transfer efficiency, and gaseous mixture will be as much as possible under stoichiometric mixing ratio（Excess air
Coefficient is 1.0）Burning.Lambda sensor 14 on exhaust pipe by the oxygen content detected in being vented and feeds back to engine
Controller 15, engine controller 15 will adjust gas spraying tolerance accordingly to ensure the gasoline air mixture ratio of requirement.Exhaust
Finally it is discharged to by muffler 16 in ambient air.
It is preferred that using this method natural gas fuel, other gases using methane as main component can also be used, including
Coal bed gas, shale gas and hydrocarbon hydrate gas etc..
It is preferred that using this method natural gas engine highest working speed at 4000~8000 revs/min, hair
Every cylinder displacement of motivation（Swept volume）Less than or equal to 0.6 liter.
Embodiment 4
Contrast test
Refer to Fig. 2, and in conjunction with the embodiments 2 and embodiment 3 to do contrast test as follows, while declare as follows, the present embodiment
Middle natural gas engine uses the natural gas engine with charge air cooler 3 in embodiment 2, the 1.2L of the prior art in the present embodiment 4
Gasoline-natural gas double fuel engine is the engine that can be bought on existing market, and performance data is all to be bought
The arithmetic mean of instantaneous value of data measured by prior art engine.For convenience of elaboration, gasoline-natural gas double-fuel is started below
The situation of machine natural gas fuel is known as double fuel natural gas engine.
Prior art 1.2L double fuel natural gas engines（CNG）With Turbocharged Natural Gas Engine of the present invention（CNG- increases
Pressure）.
4.1.1 effective specific fuel consumption contrast test
Prior art 1.2L double fuel natural gas engines（CNG）With Turbocharged Natural Gas Engine of the present invention（CNG- is pressurized）
Effective specific fuel consumption contrast test is as shown in Figure 3.
As can be seen from Figure 3, Turbocharged Natural Gas Engine effective fuel consumption ratio of the present invention is lower, can effectively reduce automobile
Use cost, there is extremely vast market prospect.
4.1.2 effective torque contrast test
Prior art 1.2L double fuel natural gas engines（CNG）With Turbocharged Natural Gas Engine of the present invention（CNG- is pressurized）
Effective torque contrast test is as shown in Figure 4.
With reference to Fig. 3, figure 4, it can be seen that Turbocharged Natural Gas Engine of the present invention in effective specific fuel consumption than the prior art
While double fuel natural gas engine is confidential low, the effective torque of the engine under different rotating speeds, is both significantly higher than the prior art
Double fuel natural gas engine.Thus, Turbocharged Natural Gas Engine provided by the invention has more preferably power performance.
4.1.3 effective power contrast test
Prior art 1.2L double fuel natural gas engines（CNG）With Turbocharged Natural Gas Engine of the present invention（CNG- is pressurized）
Effective power comparative test result is as shown in Figure 5.
With reference to Fig. 3 and Fig. 4, as can be seen from Figure 5, Turbocharged Natural Gas Engine of the present invention is in effective specific fuel consumption than existing skill
While the double fuel natural gas engine of art is confidential low, the effective torque of the engine under different rotating speeds, effective power is above
The double fuel natural gas engine of the prior art.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this area skill
Art personnel without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore the guarantor of the present invention
Shield scope should be subject to the scope that the claims in the present invention are defined.
Claims (8)
1. a kind of natural gas engine using chemical equivalent mixing ratio combustion system, including gray iron, cylinder, piston, band
Move toggle, gas handling system and the exhaust system of the reciprocating motion of the pistons, gas burning system, ignition system and start
Machine controller, the ignition system include being installed on the cylinder cap and the corresponding spark plug of the cylinder again；Its feature exists
In：
Exhaust-driven turbo-charger exhaust-gas turbo charger, air inlet pipe and exhaust pipe, the exhaust gas turbine are equipped with the gas handling system and exhaust system
Booster further comprises compressor and turbine, and the turbine is connected with the exhaust pipe, the compressor with it is described
Air inlet pipe is connected, and the exhaust through exhaust pipe discharge promotes the rotating turbine and drives connected compressor, the exhaust
Ternary catalyzing unit and lambda sensor are additionally provided with pipe, the front-end and back-end of the ternary catalyzing unit set the lambda sensor,
The lambda sensor is connected by circuit with engine controller, and set in parallel with the turbine is additionally provided with the exhaust pipe
The exhaust gas by-pass valve put, so that portion discharge will not be by the turbine, but is directly entered by the exhaust gas by-pass valve
The ternary catalyzing unit；
The gas burning system includes gas injector again, and the gas injector sprays natural gas with the pressure of 0.2~0.9MPa
Inject into engine inlets, form uniform air-day after being mixed with the air entered by air inlet pipe in the cylinder
Right gas gaseous mixture；
The excess air coefficient of the air-natural gas gaseous mixture is 0.85~1.1, and the air-natural gas gaseous mixture is in institute
State in cylinder and compressed by the piston that compression ratio is 11.0~13.0, when the piston approaches top dead center, by the fire
The spark that Hua Sai is produced is lighted and burnt, and the air-natural gas gaseous mixture is in the gas in-cylinder combustion and expands against described
Piston does work, and the exhaust pipe is entered after exhaust, then discharged after ternary catalyzing unit purification；
Wherein, the oxygen content detected in being vented is fed back to the engine controller, the engine by the lambda sensor
Controller further adjusts the jet amount of the natural gas to ensure to realize that chemical equivalent is mixed according to the oxygen content of feedback
The gasoline air mixture ratio of composition and division in a proportion combustion requirements.
2. the natural gas engine according to claim 1 using chemical equivalent mixing ratio combustion system, it is characterised in that
The gas injector is installed on the cylinder cap or in the air inlet pipe.
3. the natural gas engine according to claim 1 using chemical equivalent mixing ratio combustion system, it is characterised in that
The gas handling system further includes the air cleaner for being arranged on exhaust-driven turbo-charger exhaust-gas turbo charger front end, and is arranged on exhaust gas turbine
The air throttle of booster rear end, the air throttle adjust the load of engine by adjusting the air inflow of engine.
4. the natural gas engine according to claim 1 using chemical equivalent mixing ratio combustion system, it is characterised in that
The gas burning system further includes the gentle rail of pressure regulator valve for being arranged on gas injector front end, and the natural gas passes through the pressure regulator valve
Gentle rail enters the gas injector.
5. the natural gas engine according to claim 1 using chemical equivalent mixing ratio combustion system, it is characterised in that
At 4000~8000 revs/min, every cylinder displacement of engine is less than or waits the highest working speed of the natural gas engine
In 0.6 liter.
6. the natural gas engine according to claim 1 using chemical equivalent mixing ratio combustion system, it is characterised in that
Further include the charge air cooler being arranged in the air inlet pipe.
7. the natural gas engine according to claim 1 using chemical equivalent mixing ratio combustion system, it is characterised in that
The natural gas is gas using methane as main component, including coal bed gas, shale gas and/or hydrocarbon hydrate gas.
8. a kind of combustion method for being used for any one natural gas engine in claim 1 to 7, includes the following steps：
S1, natural gas are injected into engine inlets under the pressure of 0.2~0.9MPa, are mixed with air, and enter hair
In motivation cylinder, uniform air-natural gas gaseous mixture is further mixed to form with air；
S2, the gaseous mixture that excess air coefficient is 0.85~1.1, the pressure by compression ratio for 11.0~13.0 engine piston
Contracting, in piston approaches top dead center, is lighted and is burnt by the spark that spark plug produces, gaseous mixture promotes after burning and expansion
Piston do work, final vacuum discharge cylinder；
S3, exhaust enter the turbine of exhaust-driven turbo-charger exhaust-gas turbo charger by exhaust pipe, promote rotating turbine and drive connected pressure
Mechanism of qi, then, exhaust enter ternary catalyzing unit and react, and finally exhaust is discharged into air by muffler.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408370.9A CN104213976B (en) | 2014-08-19 | 2014-08-19 | Natural gas engine combustion method and the Turbocharged Natural Gas Engine using this method |
| PCT/CN2015/085610 WO2016026375A1 (en) | 2014-08-19 | 2015-07-30 | Natural gas engine combustion method and supercharged natural gas engine using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408370.9A CN104213976B (en) | 2014-08-19 | 2014-08-19 | Natural gas engine combustion method and the Turbocharged Natural Gas Engine using this method |
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| Publication Number | Publication Date |
|---|---|
| CN104213976A CN104213976A (en) | 2014-12-17 |
| CN104213976B true CN104213976B (en) | 2018-05-01 |
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| CN201410408370.9A Active CN104213976B (en) | 2014-08-19 | 2014-08-19 | Natural gas engine combustion method and the Turbocharged Natural Gas Engine using this method |
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| WO (1) | WO2016026375A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213976B (en) * | 2014-08-19 | 2018-05-01 | 江苏上淮动力有限公司 | Natural gas engine combustion method and the Turbocharged Natural Gas Engine using this method |
| CN104500215B (en) * | 2014-12-24 | 2017-03-29 | 深圳智慧能源技术有限公司 | Gaseous fuel piston engine and its gas handling system |
| WO2016101193A1 (en) * | 2014-12-24 | 2016-06-30 | 深圳智慧能源技术有限公司 | Gaseous fuel piston engine and air intake system thereof |
| CN105986935A (en) * | 2015-02-11 | 2016-10-05 | 联创汽车电子有限公司 | Fuel ejection system of natural gas engine and air inflow computing method |
| CN104791075A (en) * | 2015-04-20 | 2015-07-22 | 吉林大学 | Ignition-mode-variable diesel/natural gas dual-fuel engine and control method thereof |
| CN105715420A (en) * | 2016-03-08 | 2016-06-29 | 广东康菱动力科技有限公司 | Intake and exhaust system of gas engine |
| CN105781724A (en) * | 2016-03-30 | 2016-07-20 | 上海交通大学 | Natural gas engine with online in-cylinder fuel reformation system |
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