CN101440742A - Direct spraying composite flow guide laminating combustion system in spark ignition methanol cylinder - Google Patents
Direct spraying composite flow guide laminating combustion system in spark ignition methanol cylinder Download PDFInfo
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- CN101440742A CN101440742A CNA2008102365349A CN200810236534A CN101440742A CN 101440742 A CN101440742 A CN 101440742A CN A2008102365349 A CNA2008102365349 A CN A2008102365349A CN 200810236534 A CN200810236534 A CN 200810236534A CN 101440742 A CN101440742 A CN 101440742A
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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
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention relates to a direct-injection composite flow-guiding layered combustion system in a spark-ignited methanol cylinder of an automobile engine, which comprises a combustion chamber, a spark plug, an oil injection nozzle, an air intake door and an exhaust door. A spiral air inlet channel is communicated with the combustion chamber through the air intake door at the lower end thereof; an exhaust channel is communicated with the combustion chamber through the exhaust door at the lower end thereof; fuel oil directly flows through the oil injection nozzle with unevenly distributed oil injection holes, injects the methanol into the combustion chamber in the later period of a compression stroke when middle or low load is in existence, guides the combustible mixed gas to the spark plug under the combined action of the guide of the flow-guiding face of the combustion chamber and air intake vortex flow and spraying jet, so the mixed gas near the spark plug is relatively thick, the mixed gas in the other parts of the combustion chamber is relatively thin, and layered mixed gas easily ignited and spraying flame is formed; when high load is existed, the fuel oil is jetted into the cylinder in the air intake stroke to form mixed gas with homogeneous stoichiometric proportion so as to realize homogeneous premixing combustion. Therefore, the engine has good power performance.
Description
Technical field
The present invention relates to ignition internal combustion engine inner cylinder direct injection technology, further relate to direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder, be fit to the use of spark ignition in-cylinder direct injection stratified charge engine and Aalcohols fuel motor.
Background technique
As a kind of novel lean combustion mode, in-cylinder direct injection (GDI) motor combines the advantage of compression ignition engine and spark-ignition engine, inner cylinder direct injection by fuel oil, variable injection timing and the modes such as air motion in the control cylinder realize lean combustion in the cylinder, make motor still all show bigger development potentiality than traditional intake port injection motor (PFI) at aspects such as reducing discharging at fuel economy.
The GDI motor can be divided into two kinds of combustion modes of homogeneous lean-burn and layering lean-burn according to the difference of operating mode.During middle-low load, fuel oil sprays into the firing chamber in the compression stroke later stage, by the reasonable cooperation of oil bundle, air-flow and firing chamber, forms stratified mixtures from thick to thin near spark plug; During high load, fuel oil sprays into the firing chamber in early days in aspirating stroke, forms equivalent proportion and is about 1 homogeneous charge and burn, to keep the high advantage of petrol engine power.
The working method of GDI all had the research report from the 1950's to the beginning of the nineties.Early stage GDI motor can obtain fuel economy or emission performance preferably under some operating point, but generally speaking, because internal-combustion engine was made the backwardness of level and electrical control means at that time, the gasoline engine performance of exploitation is not good, can only in very little operating mode scope, work, and complex structure, cost is higher, thereby does not obtain actual application., abroad the GDI Study on Technology has been become increasingly active since the nineties from eighties of last century, the existing corresponding GDI type of companies such as Mitsubishi, Toyota and U.S.'s Ford is released.But external GDI combustion system adopts swirl nozzle mostly, by gas handling system that can produce the complexity of rolling stream or variable vortex and the firing chamber that cooperates complicated shape, the stratified mixture combustion when being implemented in sub load.This charge stratification method because the layering quality is controlled by fluid dynamic, realizes relatively difficulty of stratified mixture combustion in the whole working condition.In addition, strong intake swirl also can cause the motor charging efficiency that bigger reduction is arranged.
Methyl alcohol octane value height, flame propagation speed is a kind of good oxo fuel that contains, and strengthens it and utilizes the pollution that reduces environment and to alleviate oil crisis all significant.
The application of methyl alcohol on the spark ignition in-cylinder direct fuel-injection engine of external report at present is also fewer, Japan cleaner engines research institute is in the OSKA combustion system, some research work were once done in MAN-FM combustion system by MAN company, but there is the big and high problem of heat load of wall heat transfer loss respectively, in addition, the HC of two kinds of combustion systems discharging is all than higher.
Domestic patent of invention (notification number is CN 101240741) discloses the technology of " pluralities of fuel internal combustion (IC) engine cylinder inner direct circularly stratified charge combustion system ", technical characterstic is: adopt the combustion-supporting method of spark plug, on a single cylinder diesel, developed circularly stratified charge (DICSC) combustion system, fuel oil sprays into the firing chamber by the oil nozzle of spray orifice uneven distribution in the compression stroke later stage, near the spark plug oily interfascicular angle is less, and become big gradually along eddy current direction oil interfascicular angle in the spark plug downstream, utilize eddy motion in mechanical motion and the firing chamber, realized mixed gas circularly stratified charge from thick to thin, but this combustion system is to the oil nozzle pattern, parameters such as spark plug and oil bundle relative position are comparatively responsive, mate that spark plug is very difficult with oily interfascicular relative position under the different operating modes.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, direct spraying composite flow guide laminating combustion system in a kind of spark ignition methanol cylinder is provided, adopt the perforated plate type atomizer of spray orifice uneven distribution that fuel oil is sprayed in the cylinder, in conjunction with the intake swirl that produces through spiral inlet duct, and cooperate shallow pot shape firing chamber, slope, realize stratified mixture combustion and homogeneous combustion.
The realization the technical solution adopted in the present invention is: direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder comprises: one is that last top and piston 3 upper surfaces are firing chamber 4, spark plug 10, oil nozzle 7, intake valve 6 and the exhaust valve 8 of going to the bottom with cylinder head bottom surface 1; A screw type intake duct 5 communicates with firing chamber 4 by intake valve 6 in its lower end; An air outlet flue 9 communicates with firing chamber 4 by exhaust valve 8 in its lower end; The spray orifice uneven distribution of oil nozzle 7, during middle-low load, fuel oil sprays into firing chamber 4 by oil nozzle 7 in the compression stroke later stage, by the guiding of firing chamber guide face 2 and intake swirl and the acting in conjunction of spray stream, guide inflammable mixture into spark plug 10, make near the mixed gas the spark plug 10 denseer, the mixed gas of firing chamber other parts is rarer, thereby form the stratified mixtures be easy to light with flame propagation, by the parameter optimization of combustion system, in cylinder, realize the fuel economy that the layering lean-burn is realized; During high load, fuel oil forms the homogeneous stoichiometry and realizes the homogeneous premixed combustion than near mixed gas in aspirating stroke sprays into cylinder, thus the power performance that motor is obtained.
Some other characteristics of the present invention are, spark ignition engine requires in the cylinder air motion little than diesel engine, and stronger air-flow is easy to blow out fire nuclear, influence combustion stability, so the 4 employing shallow basin type firing chambers, firing chamber of methanol engine, compression ratio is 14; Piston 3 has a guide face 2, and the effect of guide face 2 is to cooperate spray stream and intake swirl with the mixed gas spark plug 10 that leads; The octane value of methyl alcohol is than gasoline height, and the latent heat of vaporization is big simultaneously, and temperature is low in the cylinder, thus can adopt bigger compression ratio, to improve the power character and the Economy of methanol engine.
The column pit diameter of firing chamber 4 is 70mm, and the degree of depth is 15mm, and the height h of guide face 2 is 13mm, and the position angle ∠ A of guide face 2 is 50 °, and guide face 2 is 32 ° with the angle ∠ B at 4 vertical piston pin centers, firing chamber; Oil nozzle 7 is 24mm with the distance in spark plug 10 gaps, and spark plug 10 stretches out the cylinder cap distance and is 4.5mm; The taper angle theta of oil nozzle 7 spraying methyl alcohol is 90 °; The intrafascicular heart 11 of oil is to the angle of spark plug 10 deflections
It is 30 °; The angle ψ of oil bundle a and cylinder cap bottom surface is 15 °～20 °; Circumferential angle β between oil bundle a and the spark plug 10 is 15 °.
Best fuel supply advance angle of the present invention is respectively: 36 ℃ of A BTDC of stratified mixture combustion, 310 ℃ of A BTDC of homogeneous combustion; Best oil sprayer injection starting pressure is respectively: stratified mixture combustion 14MPa, homogeneous combustion 10MPa.
The intake vortex strength that spirality channel 5 produces is 0.3～1.8; Best intake vortex strength is respectively: stratified mixture combustion 1.1, homogeneous combustion 0.8.
Description of drawings
Fig. 1 is a structural representation of the present invention; Wherein Fig. 1 (a) is a plan view, and Fig. 1 (b) is a plan view.
Fig. 2 is a construction profile of the present invention.
Fig. 3 is a spoiler mounting point schematic representation; Wherein Fig. 3 (a) is a plan view, and Fig. 3 (b) is a plan view.
Engine performance curve when Fig. 4 is a burning methanol of the present invention; Wherein Fig. 4 (a) is the lean burn characteristics curve of methanol engine; Fig. 4 (b) is the thermal efficiency of methanol engine; Fig. 4 (c) is the external characteristic curve of methanol engine; Fig. 4 (d) is the cyclical variations figure of mean effective pressure.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and working principle are described in further detail.
Direct spraying composite flow guide combustion system in the spark ignition methanol cylinder comprises that one be Shang Ding with cylinder head bottom surface 1 and is firing chamber 4, spark plug 10, perforated plate type atomizer 7, intake valve 6 and the exhaust valve 8 of going to the bottom with piston 3 upper surfaces of being with guide face 2; A spirality channel 5 communicates with firing chamber 4 by intake valve 6 in its lower end, so that make the air that enters form eddy current in firing chamber 4; An air outlet flue 9 communicates with firing chamber 4 by exhaust valve 8 in its lower end, so that firing chamber internal combustion gas is discharged.
Working procedure of the present invention is described below: intake stroke, and air enters in the cylinder by spiral inlet duct 5, forms the eddy motion of rotating around cylinder-bore axis; During middle-low load, perforated plate type atomizer 7 by uneven distribution sprays into firing chamber 4 to fuel oil in the compression stroke later stage, by the guiding of firing chamber guide face 2 and intake swirl and the acting in conjunction of spray stream, guide inflammable mixture into spark plug 10, make near the mixed gas the spark plug 10 denseer, the mixed gas of firing chamber 4 other parts is rarer, thereby forms the stratified mixtures be easy to light with flame propagation; Spark plug 10 igniting after the fuel injection, flame begins other regional spread to firing chamber 4 from spark plug 10 gaps, and high-temperature fuel gas promotes piston 3 actings, enters the expansion stage; Piston 3 exhaust valve of a certain moment is before bottom dead center opened, and enters exhaust stroke, and combustion gas are discharged firing chamber 4 by exhaust valve; Piston 3 arrives budc, and intake valve is opened, and enters intake stroke, and so forth.By the parameter optimization of combustion system, in cylinder, realize the fuel economy that the layering lean-burn is realized; During high load, fuel oil forms the homogeneous stoichiometry and realizes the homogeneous premixed combustion than near mixed gas in aspirating stroke sprays into cylinder, thus the power performance that motor is obtained.
Direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder of the present invention is tested on a motor by the repacking of 4102QB diesel engine.Select diesel engine to reequip and mainly be based on following two reasons:
(1), the reason of compression ratio: the octane value of methyl alcohol is higher, and motor can use the compression ratio higher than petrol engine during burning methanol, thereby can improve the Economy and the power character of motor.For engine for combusting methyl alcohol, along with the raising of compression ratio, mixed gas compression temperature and pressure at the end also improves thereupon in the cylinder, can improve the combustion condition of mixed gas, helps the rapid combustion of methyl alcohol, has reduced partial combustion and heat transfer loss.
(2), the advantage of oil supply system: the optimum injection starting pressure of the methanol engine oil sprayer after the optimization is 14MPa, its injection starting pressure will exceed much than the injection starting pressure of general GDI motor 5MPa, high injection starting pressure will help the atomizing of methyl alcohol, increase the spray cone angle of methyl alcohol, reduce liquid-drop diameter, these all will help the rapid mixing and the burning of methyl alcohol, thereby can improve the thermal efficiency and the working stability of motor.
One, the spatial relationship of oil bundle a--f and firing chamber 4 and spark plug 10
Referring to Fig. 1, relative position how to determine oil nozzle 7, spark plug 10 and firing chamber 4 will be the key content of combustion system design.On the spatial relationship of oil bundle a--f and firing chamber 4 and spark plug 10, two kinds of mentalities of designing are arranged: a kind of is that the center line of oil bundle a--f is parallel with the center line of cylinder, i.e. angle
Value be 0, lean on the evaporation of 4 bottoms, firing chamber fully, rebound effect forms end to end mixing compression ring, relend and help the slope of eddy current and firing chamber 4 to guide inflammable mixture into spark plug 10, this scheme is less demanding to the circumferential distribution of oil bundle in firing chamber 4, just can realize burning as long as can form closed inflammable mixture ring, but there is a defective in theory in this scheme, it is exactly the undue evaporation that depends on combustion chamber wall surface of formation of mixed gas, because the evaporation of methyl alcohol heat absorption must make the temperature of piston head descend, so the temperature of piston head possibly can't guarantee that methyl alcohol evaporates atomizing in the short period of time; Another kind is that oil bundle a--f center is to angle of spark plug 10 deflections, promptly
Value is greater than 0, and the rationale of this design philosophy is: on the one hand, form continuous inflammable mixture by the evaporation rebound effect of combustion chamber wall surface and distribute; On the other hand, oil is restrainted the upstream that a directly sprays to spark plug 10, utilize eddy current to guide inflammable mixture into spark plug 10, so just avoided to take place the not enough situation of wall evaporation.Deflection angle
Choose and will consider following two aspects:
(1), angle can not be too big, if angle is excessive, then oil bundle a might directly be sprayed onto on the cylinder cap, can not guarantee the mixture strength in spark plug 10 gaps;
(2), angle can not be too little, if angle too small, then oil bundle a will be too far away apart from spark plug 10 at vertical direction, just can not guarantee that at time of ignition there is the suitable inflammable mixture of concentration at spark plug 10 electrode places like this.
According to numerical simulation and engine test checking, when
The time, engine thermal efficiency is the highest.
In addition, the circumferential angle β between oil bundle a and the spark plug 10 also can directly influence the work effect of motor.If angle β is too small, methyl alcohol can directly bump against on the spark plug 10, and spark plug 10 is buried in oblivion, and causes engine misses; When β was excessive, methyl alcohol will fully mix with air in the cylinder before arriving spark plug 10, formed weak mixture, and motor can't be worked.According to methyl alcohol spray testing and numerical simulation, and through verification experimental verification, when β=15 °, engine thermal efficiency is the highest.
Two, engine nozzle design
The distribution of oil nozzle oilhole is wanted to guarantee to form continuous mixture strength distribution after oily beam evaporation, the atomizing.Four hole nozzles of former diesel engine can not address that need because form rare flame-out district between the oil bundle, so must increase the number of spray orifice.The distribution of mixture strength field depends primarily on the distribution of oil nozzle top oilhole in the in-cylinder direct injection composite flow guide laminating combustion system.Spray characteristics and the relation of the position between oil sprayer and the spark plug according to methyl alcohol, experimental design perforated plate type atomizer, reduce the angle of oily interfascicular, and cooperate novel chamber structure---shallow pot shape firing chamber, slope, utilize the acting in conjunction of guide face, air swirl and the injection guiding of firing chamber to guide inflammable mixture into spark plug, thereby realize catching fire smoothly and smooth combustion of methanol engine.Calculate and verification experimental verification through theory, the present invention selects 6 hole oil nozzles for use, and engine performance is good.
The processing of oil nozzle also should be considered the problem of oil bundle penetration distance, the penetration distance of methyl alcohol is little than diesel oil, and too small penetration distance just can not guarantee making full use of of air in the cylinder reduced the thermal efficiency of motor, and can influence the rebuffed bounce-back effect of methyl alcohol.Methanol engine is arranged into spark plug 10 edge of firing chamber 4, and increased the volume of firing chamber, all these requires the penetration distance of methyl alcohol can be bigger, when learning that by optimization Test oil nozzle 7 injection diameters are 0.31mm, engine combustion is stable, thermal efficiency height.
Three, the position of guide face 2
Shown in Fig. 1 (b), prove through numerical simulation and verification experimental verification, when guide face 2 is positioned at the upstream of spark plug 10 suitable eddy current directions, both can utilize guide face the barrier effect of air to be guaranteed the reliability of igniting, can avoid again can't propagating continuously because of the inflammable mixture tomography makes flame, this moment the engine operation good stability, thermal efficiency height.
Four, the coupling of swirl rate
As shown in Figure 3, because burning is carried out with flame propagation mode, so do not need former diesel engine high swirl rate like that, except that the cylinder cap that adopts low swirl rate, also in screw type intake duct 5, install spoiler 12 additional and obtain different intake swirls, just can obtain different swirl rates with the length that spoiler 12 gos deep into air flue by the size that changes spoiler 12 front ends.The swirl rate size is carried out analogue measurement on Steady Flow Test Rig.
Because the CONCENTRATION DISTRIBUTION of mixed gas is uneven in the composite flow guide laminating combustion system of the present invention, mixture strength changed with spatial position and time in the firing chamber 4, thereby, want under any operating mode, can both guarantee the formation that fire nuclear is stable and flame is propagated smoothly that oily bundle, air-flow, firing chamber three's rational Match is most important.Through numerical simulation and verification experimental verification, draw its parameters optimization and be: the distance that spark plug 10 stretches out cylinder cap is 4.5mm; Best fuel supply advance angle is respectively: 36 ℃ of A BTDC of stratified mixture combustion, 310 ℃ of A BTDC of homogeneous combustion; Best oil sprayer injection starting pressure is respectively: stratified mixture combustion 14MPa, homogeneous combustion 10MPa; Intake vortex strength is respectively: stratified mixture combustion 1.1, homogeneous combustion 0.8; Adopt shallow pot shape firing chamber, slope, compression ratio is 14.
Referring to Fig. 4, when the inventor has provided burning methanol of the present invention, the example of engine performance.
Fig. 4 (a) is the lean burn characteristics curve of methanol engine.By this figure as seen, start function stable operation in excess air coefficient is 1.58～2.23 scope, illustrate that composite flow guide laminating combustion system of the present invention is through after the parameter optimization, solved the integrity problem that catches fire preferably, in the rotating speed and load range of broadness, can guarantee that inflammable mixture normal ignition and flame holding propagate, the mode by stratified mixture combustion has realized that motor uses weak mixture when sub load, and then has improved the Economy of motor.
Fig. 4 (b) is depicted as the thermal efficiency figure of methanol engine.By this figure as seen, under the medium and small load, the thermal efficiency ratio homogeneous combustion of stratified mixture combustion on average will exceed about 4 percentage points.The high thermal efficiency of stratified mixture combustion is 29.7%, and the high thermal efficiency of homogeneous combustion is 35.3%, far above regular gasoline machine level.
Fig. 4 (c) is depicted as the external characteristic curve of methanol engine.By this figure as seen, this methanol engine low speed torque is very big, and this is because the limit of not smoldered limits.The methanol engine Maximum Torque is 260.3N.m, has improved 20.90% than former machine; Peak output is 62.53kW, has improved 5.88% than former machine, and this has demonstrated fully the advantage of this methanol engine high-load region employing homogeneous equivalent proportion mixed gas good dynamic property.As can be seen, methanol engine is under various rotating speeds from the external characteristics figure, and the power moment of torsion illustrates that all apparently higher than former machine the methyl alcohol in-cylinder direct fuel-injection engine of this paper exploitation has extraordinary power performance.
Fig. 4 (d) is depicted as the cyclical variations figure of methanol engine mean indicated pressure.By this figure as seen, methanol engine is in the speed range of broadness, and the cyclical variations of mean indicated pressure all are no more than 10%, flameholding, and vehicle traction is good.
In summary, adopt direct spraying composite flow guide laminating combustion system in the methanol cylinder of the present invention Engine has thermal efficiency height, good dynamic property, advantage that cyclical variations are good.
Claims (10)
1, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder comprises that one is that last top and piston (3) upper surface are firing chamber (4), spark plug (10), oil nozzle (7), intake valve (6) and the exhaust valve (8) of going to the bottom with cylinder head bottom surface (1); It is characterized in that a screw type intake duct (5) communicates with firing chamber (4) by intake valve (6) in its lower end; An air outlet flue (9) communicates with firing chamber (4) by exhaust valve (8) in its lower end; The spray orifice uneven distribution of oil nozzle (7), during middle-low load, fuel oil sprays into firing chamber (4) by oil nozzle (7) in the compression stroke later stage, by the guiding of firing chamber guide face (2) and intake swirl and the acting in conjunction of spray stream, guide inflammable mixture into spark plug (10), make near the mixed gas the spark plug (10) denseer, the mixed gas of firing chamber (4) other parts is rarer, thereby forms the stratified mixtures that is easy to light with flame propagation.
2, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder as claimed in claim 1 is characterized in that, firing chamber (4) adopt the shallow basin type firing chamber.
3, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder as claimed in claim 1 or 2 is characterized in that the column pit diameter of firing chamber (4) is 70mm, and the degree of depth is 15mm.
4, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder as claimed in claim 1 is characterized in that, oil nozzle (7) is a nozzle opening more than 4 perforated plate type atomizer, and oil nozzle (7) injection diameter is 0.31mm.
5, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder as claimed in claim 1 is characterized in that oil nozzle (7) is 6 hole oil nozzles.
6, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder as claimed in claim 1, it is characterized in that, the height h of guide face (2) is 13mm, and the position angle ∠ A of guide face (2) is 50 °, and guide face (2) is 32 ° with the angle ∠ B at vertical piston pin center, firing chamber (4).
7, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder as claimed in claim 1 is characterized in that, oil nozzle (7) is 24mm with the distance in spark plug (10) gap, and spark plug (10) stretches out the cylinder cap distance and is 4.5mm; The taper angle theta of oil nozzle (7) spraying methyl alcohol is 90 °.
8, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder as claimed in claim 1 is characterized in that the oily intrafascicular heart (11) is to the angle of spark plug (10) deflection
Be 30 °, oil bundle (a) is 15 °～20 ° with the angle Ψ of cylinder cap bottom surface, and the circumferential angle β between oil bundle (a) and the spark plug (10) is 15 °.
9, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder as claimed in claim 1 is characterized in that, spirality channel (5) makes the air that enters firing chamber (4) form eddy current, and intake vortex strength is 0.3～1.8.
10, direct spraying composite flow guide laminating combustion system in the spark ignition methanol cylinder as claimed in claim 1 is characterized in that firing chamber (4) compression ratio is 14.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915153A (en) * | 2010-07-19 | 2010-12-15 | 奇瑞汽车股份有限公司 | Methanol direct injection engine combustion system and methanol injection strategy thereof |
| CN103670773A (en) * | 2012-09-18 | 2014-03-26 | 广西玉柴机器股份有限公司 | Four-valve gas engine |
| CN107620633A (en) * | 2017-09-08 | 2018-01-23 | 宁波市鄞州德来特技术有限公司 | Methanol engine |
| CN111412075A (en) * | 2020-04-27 | 2020-07-14 | 西安交通大学 | Direct injection methanol engine in cylinder and working method of methanol engine combustion system |
| CN111550332A (en) * | 2020-04-07 | 2020-08-18 | 天津大学 | Air flow spraying and disturbing device in cylinder of internal combustion engine |
| CN113294245A (en) * | 2021-07-07 | 2021-08-24 | 中科航星科技有限公司 | Ignition method and ignition system of small turbojet engine |
| CN114032123A (en) * | 2021-11-24 | 2022-02-11 | 孺子牛新能源科技有限公司 | High-proportion methanol diesel additive and using method thereof |
| CN115234398A (en) * | 2022-08-22 | 2022-10-25 | 浙江吉利控股集团有限公司 | Methanol engine and vehicle |
| CN117028016A (en) * | 2023-10-09 | 2023-11-10 | 潍柴动力股份有限公司 | In-cylinder direct injection methanol engine and combustion chamber thereof and combustion chamber parameter determining method |
-
2008
- 2008-12-30 CN CNA2008102365349A patent/CN101440742A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915153A (en) * | 2010-07-19 | 2010-12-15 | 奇瑞汽车股份有限公司 | Methanol direct injection engine combustion system and methanol injection strategy thereof |
| CN103670773A (en) * | 2012-09-18 | 2014-03-26 | 广西玉柴机器股份有限公司 | Four-valve gas engine |
| CN107620633A (en) * | 2017-09-08 | 2018-01-23 | 宁波市鄞州德来特技术有限公司 | Methanol engine |
| CN111550332A (en) * | 2020-04-07 | 2020-08-18 | 天津大学 | Air flow spraying and disturbing device in cylinder of internal combustion engine |
| CN111412075A (en) * | 2020-04-27 | 2020-07-14 | 西安交通大学 | Direct injection methanol engine in cylinder and working method of methanol engine combustion system |
| CN113294245A (en) * | 2021-07-07 | 2021-08-24 | 中科航星科技有限公司 | Ignition method and ignition system of small turbojet engine |
| CN114032123A (en) * | 2021-11-24 | 2022-02-11 | 孺子牛新能源科技有限公司 | High-proportion methanol diesel additive and using method thereof |
| CN115234398A (en) * | 2022-08-22 | 2022-10-25 | 浙江吉利控股集团有限公司 | Methanol engine and vehicle |
| CN117028016A (en) * | 2023-10-09 | 2023-11-10 | 潍柴动力股份有限公司 | In-cylinder direct injection methanol engine and combustion chamber thereof and combustion chamber parameter determining method |
| CN117028016B (en) * | 2023-10-09 | 2024-01-12 | 潍柴动力股份有限公司 | In-cylinder direct injection methanol engine and combustion chamber thereof and combustion chamber parameter determining method |
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