CN106884707B - Combustion system and engine with it - Google Patents
Combustion system and engine with it Download PDFInfo
- Publication number
- CN106884707B CN106884707B CN201710201276.XA CN201710201276A CN106884707B CN 106884707 B CN106884707 B CN 106884707B CN 201710201276 A CN201710201276 A CN 201710201276A CN 106884707 B CN106884707 B CN 106884707B
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- CN
- China
- Prior art keywords
- spark plug
- combustion system
- engine
- cylinder cap
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 28
- 230000000644 propagated effect Effects 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
-
- 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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
- F02B23/104—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on a side position of the cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4285—Shape or arrangement of intake or exhaust channels in cylinder heads of both intake and exhaust channel
-
- 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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
- F02B2023/102—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the spark plug being placed offset the cylinder centre axis
-
- 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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
- F02B2023/106—Tumble flow, i.e. the axis of rotation of the main charge flow motion is horizontal
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The present invention provides a kind of combustion system, including air intake duct, exhaust duct, spark plug, cylinder cap and piston, the spark plug is located at the exhaust side of cylinder cap on the cylinder cap for the position of arranged off-centre and spark plug.The combustion system of engine of the present invention, is arranged using eccentric spark plug, can improve the anti-knock properties of engine, and the knock problem of engine is solved, and is improved high speed cylinder flame and is propagated inhomogeneities, increases dynamic property when high engine speeds.The present invention also provides a kind of engines.
Description
Technical field
The invention belongs to technical field of engines, specifically, the present invention relates to a kind of combustion system and with its hair
Motivation.
Background technology
Enter economic development " new normality " along with domestic Macro-economic situation, and just undertaking the after 80s of family's important task and
The main force after 90s as Automobile Market, domestic type car are in the peak phase that family purchases vehicle.Car is improving
While living convenient, the problem of also bringing energy shortage and environmental crisis.In view of the above-mentioned problems, China was January 1 in 2015
Day has promulgated fourth stage fuel economy regulation.To face national oil consumption and emission regulation, research institution and enterprise expedite the emergence of out a series of
New technology of gasoline engine.Wherein, gasoline engine supercharging miniaturization, high compression ratio, Miller cycle and in cold EGR technology be increasingly becoming
The developing direction of engine technology of new generation.
Above-mentioned technology application effect depends on that one of factor is, it is horizontal to improve In Cylinder Flow tubulence energy.Wherein, using height
Tumble inlet port is common technology scheme, but when high speed such as rotating speed occurs in engine>4000r/min, cylinder flame propagation side
To can obviously be biased to exhaust side, with the increase of engine speed, inhomogeneities is more obvious, and anti-knock properties reduce, and influences high speed
External characteristics dynamic property, especially engine power rating.Although it is slow in conjunction with optimization piston pit shape that small valve inclination angle can be used
Flame propagation problem of non-uniform is solved, but during actual development, production line restructuring cost is limited, small valve inclination angle technical side
Case difficulty or ease are realized.
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention provides a kind of combustion
Burning system and engine with it, it is therefore an objective to improve engine anti-knock properties.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：Combustion system, including air intake duct, row
Air flue, spark plug, cylinder cap and piston, position of the spark plug for arranged off-centre and spark plug on the cylinder cap are located at cylinder cap
Exhaust side.
The air intake duct is high tumble inlet port.
The spark plug is located at the middle position of two exhaust valves on the cylinder cap.
The spark plug is to be vertically arranged, and the axis of spark plug is parallel with cylinder centerline.
The spark plug is to be obliquely installed, and has angle between the axis and cylinder centerline of spark plug.
Angle between the axis of the spark plug and the cylinder centerline is 2~6 °.
The distance between the electrode centers of the spark plug and the internal face of the cylinder cap minimum value are 3~5mm.
The electrode centers of the spark plug are between top dead centre and the electrode centers of spark plug and the top surface of the piston
Apart from minimum value be 3~5mm.
Pit is arranged in the top surface of the piston, and pit is set for the eccentric and exhaust side is biased at the center of pit.
The present invention also provides a kind of engines, including above-mentioned combustion system.
The combustion system of engine of the present invention, is arranged using eccentric spark plug, can improve the anti-knock properties of engine, is solved
The knock problem of engine improves high speed cylinder flame and propagates inhomogeneities, solves the problems, such as that cylinder flame passes inclined when high speed, increases
Dynamic property when high engine speeds.
Description of the drawings
Fig. 1 is the sectional view of combustion system of the present invention；
Label in above-mentioned figure is：1, air intake duct；2, spark plug；3, exhaust duct；4, cylinder cap；5, pit；6, piston is recessed
Cheat center line；7, sparking-plug electrode center line；8, cylinder centerline；9, piston；10, cylinder cap baseplane parallel lines；11, oil spout
Device；
θ is spark plug inclination angle；For fuel injector inclination angle；LeFor the shortest distance at sparking-plug electrode center and cylinder centerline；
LpFor the center line and the cylinder centerline shortest distance of piston crater.
Specific implementation mode
Below against attached drawing, by the description of the embodiment, making to the specific implementation mode of the present invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to the design of the present invention, technical solution
Solution, and contribute to its implementation.
As shown in Figure 1, the present invention provides a kind of combustion system, including air intake duct 1, exhaust duct 3, spark plug 2, cylinder cap 4,
Piston 9 and fuel injector 11, air intake duct 1 are connect with the air inlet of cylinder cap 4, and exhaust duct 3 is connect with the exhaust outlet of cylinder cap 4, fuel injector
11 are set to the side on cylinder cap 4 and positioned at air intake duct 1, and spark plug 2 is arranged off-centre and the position of spark plug 2 on cylinder cap 4
Positioned at the exhaust side of cylinder cap 4.
Specifically, as shown in Figure 1, between air intake duct 1, exhaust duct 3, cylinder cap 4 and piston 9 formed combustion chamber cavity,
Air intake duct 1 is preferably high tumble inlet port.2 arranged off-centre of spark plug is located on two exhaust valve center lines, spark in exhaust side
Plug 2 is located at the middle position of two exhaust valves on cylinder cap 4.
As shown in Figure 1, fuel injector 11 is obliquely installed on cylinder cap, if the bottom of the length direction of fuel injector 11 and cylinder cap is flat
Angle between face (plane perpendicular with piston centreline on cylinder cap) isFor acute angle, the electrode centers of spark plug 2 with
The shortest distance between cylinder centerline is 4~8mm, and spark plug 2 is set for the eccentric, and specific eccentric distance can be according to rated power
Point flame propagation uniformity design.The fuel injector 11 of directly jetting gasoline engine is 25~35 ° with crankshaft center line angle, and specific angle can root
Confirm according to CFD emulation (full name in English of CFD is Computational Fluid Dynamics).
As shown in Figure 1, spark plug 2 is to be obliquely installed, if the angle between the axis and cylinder centerline of spark plug 2 is θ,
θ is spark plug inclination angle, and according to structure limitation and practical combustion mixture needs, inclination angle theta is 2~6 °.When in sparking-plug electrode
The heart is in the top dead centre of piston, the minimum distance between sparking-plug electrode center and surrounding inboard wall of cylinder cover face and underlying piston top surface
For 3mm~5mm.
As shown in Figure 1, the top surface of piston is provided with pit 5, pit 5 is set for the eccentric and exhaust is biased at the center of pit 5
Side, center line and the cylinder centerline shortest distance, the i.e. eccentricity L of pit centres of pit 5pFor 5~10mm.By adjusting recessed
Position of the hole 5 on piston, and the setting angle of fuel injector 11 is adjusted, cooperation can be with shape near eccentric spark plug ignitor
At rational mixture strength.
The combustion chamber uses Four valve structure, and there are two inlet valve and two exhaust valves for tool, and cylinder cap bottom surface is using flat
Can be with oblique squish structure, it can be with whether exhaust duct is integrated.Small valve inclination angle arrangement can be used in inlet and outlet door.Inlet valve
It may be used with exhaust valve angle equiangularly arranged, can also be needed to use according to actual arrangement non-equiangularly arranged.
The combustion system of engine of above structure, has the following advantages：
After petrol engine uses high tumble inlet port, high rotating speed flame propagation problem of non-uniform is brought therewith, is influenced
External characteristics dynamic property is promoted.Generally alleviated using small valve inclination angle scheme, but when gasoline engine product up-gradation, early period does not adopt
With the program, with regard to larger cost adjustment production line need to be spent；Or dynamic property when reducing high engine speeds.And petrol engine uses
The combustion system of above structure need not adjust production line, by CFD simulation analysis, confirm spark plug eccentric distance and electrode
Depth, fuel injector setting angle (or nozzle oil beam angle degree) and piston crater location matches are risen up into, it is limited in production line restructuring
In the case of, it effectively solves the problems, such as to pass using high-speed flame after high tumble inlet port inclined；Or in existing small valve inclination angle technology base
It on plinth, is arranged in conjunction with eccentric spark plug, more improve combustion flame propagation uniformity, burning center of gravity can also improve each cycle in advance
Burning consistency.
The present invention also provides the combustion systems of a kind of engine, including above structure.The concrete structure of this combustion system
Fig. 1 is can refer to, details are not described herein.Since the engine of the present invention includes the combustion system in above-described embodiment, so it has
There are all advantages of above-mentioned combustion system.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is used, or without changing
Other occasions are directly applied to by the design of the present invention and technical solution, within protection scope of the present invention.
Claims (7)
1. combustion system, including air intake duct, exhaust duct, spark plug, cylinder cap and piston, it is characterised in that：The spark plug is in institute
State the exhaust side for being located at cylinder cap on cylinder cap for the position of arranged off-centre and spark plug；The electrode centers and cylinder centerline of spark plug
Between the shortest distance be 4~8mm, the electrode centers of spark plug are located at top dead centre and the electrode centers of spark plug and the top of piston
The distance between face minimum value is 3~5mm, and pit is arranged in the top surface of piston, and pit is set for the eccentric and the center of pit is biased to
The eccentricity of exhaust side, pit centres is 5~10mm.
2. combustion system according to claim 1, it is characterised in that：The air intake duct is high tumble inlet port.
3. combustion system according to claim 1, it is characterised in that：The spark plug is located at two exhausts on the cylinder cap
The middle position of door.
4. combustion system according to claim 1, it is characterised in that：The spark plug is to be vertically arranged, the axis of spark plug
Line is parallel with cylinder centerline.
5. combustion system according to claim 1, it is characterised in that：The spark plug is to be obliquely installed, the axis of spark plug
There is angle between line and cylinder centerline.
6. combustion system according to claim 5, it is characterised in that：The axis of the spark plug and the cylinder centerline
Between angle be 2~6 °.
7. engine, it is characterised in that：Including any combustion system of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201276.XA CN106884707B (en) | 2017-03-30 | 2017-03-30 | Combustion system and engine with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201276.XA CN106884707B (en) | 2017-03-30 | 2017-03-30 | Combustion system and engine with it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106884707A CN106884707A (en) | 2017-06-23 |
| CN106884707B true CN106884707B (en) | 2018-09-21 |
Family
ID=59182414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710201276.XA Active CN106884707B (en) | 2017-03-30 | 2017-03-30 | Combustion system and engine with it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106884707B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3071880B1 (en) * | 2017-09-29 | 2019-09-27 | IFP Energies Nouvelles | INTERNAL COMBUSTION ENGINE WITH DIRECT FUEL INJECTION WITHIN THE DIRECTION OF ADMISSION GAS MOVEMENT |
| CN115182825B (en) * | 2022-08-22 | 2024-01-09 | 浙江吉利控股集团有限公司 | Methanol engine and vehicle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW344015B (en) * | 1996-08-12 | 1998-11-01 | Mazda Motor | Direct fuel injection engine |
| US6725828B1 (en) * | 2003-06-17 | 2004-04-27 | Ford Global Technologies, Llc | Vortex-induced stratification combustion for direct injection spark ignition engines |
| US7137380B1 (en) * | 2005-08-05 | 2006-11-21 | Yamaha Hatsudoki Kabushiki Kaisha | Internal combustion engine with ignition plug and vehicle provided with the same |
| CN101900026A (en) * | 2010-07-05 | 2010-12-01 | 天津大学 | Wall-guided in-cylinder direct injection gasoline engine combustion chamber |
| CN203856595U (en) * | 2014-04-29 | 2014-10-01 | 长城汽车股份有限公司 | Cylinder cover for engine and engine with cylinder cover |
-
2017
- 2017-03-30 CN CN201710201276.XA patent/CN106884707B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106884707A (en) | 2017-06-23 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210414 Address after: 241009 No.38 Taishan Road, Wuhu District, China (Anhui) pilot Free Trade Zone, Wuhu City, Anhui Province Patentee after: Wuhu ekotec power assembly Co.,Ltd. Address before: 241009 No. 8, Changchun Road, Wuhu economic and Technological Development Zone, Anhui, China Patentee before: CHERY AUTOMOBILE Co.,Ltd. |
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| TR01 | Transfer of patent right |