CN209724506U - A kind of two-stroke gasoline engine cylinder - Google Patents
A kind of two-stroke gasoline engine cylinder Download PDFInfo
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- CN209724506U CN209724506U CN201920570849.0U CN201920570849U CN209724506U CN 209724506 U CN209724506 U CN 209724506U CN 201920570849 U CN201920570849 U CN 201920570849U CN 209724506 U CN209724506 U CN 209724506U
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- exhaust outlet
- cylinder body
- gasoline engine
- flow groove
- dredging flow
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Abstract
The utility model provides a kind of two-stroke gasoline engine cylinder, belongs to technology of gasoline engine field.It, which solves the big index of gasoline engine durability, power, discharge, fuel economy etc. four, the technical problems such as can not balance.Two-stroke gasoline engine cylinder in the utility model includes cylinder body, several scavenging air belts being spaced apart are provided on the inner wall of cylinder body, and cylinder body top is equipped with the combustion chamber for combust mixed gas, the exhaust outlet for after-flame exhaust gas to be discharged is provided on the side wall in the middle part of cylinder body；The dredging flow groove being connected to exhaust outlet is also provided on the side wall of cylinder body, dredging flow groove is located at the middle position on the upside of exhaust outlet.Middle side part offers dredging flow groove on cylinder exhaust port in the utility model, optimizes the power of gasoline engine and durability, while exhaust gas discharge value reduces, so that fuel economy is improved.
Description
Technical field
The utility model belongs to technology of gasoline engine field, is related to a kind of two-stroke gasoline engine cylinder.
Background technique
High-end two-stroke small-displacement gasoline engine is all to the big index of durability, power, discharge, fuel economy etc. four on the market
It is examined, wherein " exhaust height " design of exhaust outlet is extremely fastidious, and engineer needs in view of above-mentioned many in general
Factor could finally determine exhaust height, balance this four indexs by test of many times.
The exhaust height design of exhaust outlet is too low, i.e., each working cycles evacuation time shortens, and exhaust gas can be made to arrange in this way
It puts and slows down, noxious gas emission value reduces, and new fuel gas intake velocity is slow, and when engine operation is more fuel-efficient,
But since intake and exhaust speed slows down, the gaseous mixture total amount that each impulse stroke participates in burning just tails off, the output power of engine
Also can reduce；And intake and exhaust speed slows down, and the machine oil inside two stroke engine blended fuel oil can also be allowed to be supplied in each work
It is reduced in recycling, the lubrication state between cylinder and piston, piston ring is caused to deteriorate, and operating temperature rises, and then reduced
Engine life is easy scuffing of cylinder bore.Conversely, if the exhaust elevated height of exhaust outlet, the power and durability of engine have certainly
Improve, but exhaust gas discharge value can rise, fuel economy can be deteriorated.Two-stroke gasoline engine cylinder exhaust port is high in the prior art
The design of degree is difficult to take into account four big indexs.
Summary of the invention
The utility model aiming at the above problems existing in the prior art, provides a kind of two-stroke gasoline engine cylinder, this reality
With it is novel the technical problem to be solved is that: how to optimize durability, power, discharge, the fuel economy etc. of gasoline engine simultaneously
Index.
The purpose of this utility model can be realized by the following technical scheme:
A kind of two-stroke gasoline engine cylinder, including cylinder body are provided with several scavengings being spaced apart on the inner wall of the cylinder body
Road, the cylinder body top are equipped with the combustion chamber for combust mixed gas, are provided on the side wall in the middle part of the cylinder body for being discharged
The exhaust outlet of after-flame exhaust gas；It is characterized in that, the dredging flow groove being connected to the exhaust outlet is also provided on the side wall of the cylinder body, institute
State the middle position that dredging flow groove is located on the upside of the exhaust outlet.
Its working principles are as follows: the combustion chamber in the technical program burns to burning mixture, by first after-flame
Gas is flowed along combustion chamber center to exhaust outlet center, and the exhaust gas after burning-up can concentrate at the centre on the upside of exhaust outlet at first,
There is no the gas of after-flame to remain in the left and right edges on the upside of exhaust outlet substantially, exhaust outlet centre and edge are sustained heights, are being arranged
After port is opened, uncombusted gas can be extruded together cylinder with exhaust gas；Interposition in the technical program on the upside of exhaust outlet
It sets and is provided with dredging flow groove, in this way in exhaust open, exhaust gas will shift to an earlier date to be discharged from dredging flow groove, positioned at both sides on the upside of exhaust outlet
The problem of uncombusted gas can burn away, and just be squeezed out in advance there is no uncombusted gas；In on the upside of the exhaust outlet
Between the dredging flow groove opened of position, be equivalent to increase exhaust open height on the original basis, each working cycles evacuation time becomes
Long, the power of gasoline engine improves, and durability becomes strong, but because there is dredging flow groove, is equivalent to the intermediate high of the upside of exhaust outlet
Degree is greater than the height on both sides, and pernicious gas, that is, unburnt gas discharge value reduces, and fuel economy is improved.
In above-mentioned two-stroke gasoline engine cylinder, the section of the dredging flow groove is arc-shaped, the height of the dredging flow groove
For 1.5~2.5mm.Preferably, the height of dredging flow groove can be 2.0mm, when such height can be such that piston moves from bottom to top,
Generating enough pressure in cylinder can also be when piston moves to the upside of exhaust outlet from the top down, and the exhaust gas of after-flame to the greatest extent may be used before
The unburnt gas having time for being located at both sides on the upside of exhaust outlet can also be made to burn totally, make pernicious gas completely from dredging flow groove
Discharge value is preferably minimized, and fuel economy is optimal.
In above-mentioned two-stroke gasoline engine cylinder, the exhaust outlet is the strip-shaped hole being laterally arranged, the aerial drainage groove width
Degree is the 20%~30% of the exhaust outlet width.Preferably, aerial drainage groove width be the exhaust outlet width 20%,
22%, 24%, 26%, 28% or 30%, such width will not make the gas for being located at both ends on the upside of exhaust outlet flow into dredging flow groove
It is interior, the reduction of noxious gas emission value can be made.
In above-mentioned two-stroke gasoline engine cylinder, the scavenging air belt is vertically arranged along the inner wall of the cylinder body, described to sweep
Air flue extends from the cylinder body middle part to the lower end of the cylinder body.Scavenging air belt extends to cylinder body by the middle part of cylinder body straight down
Lower end can provide suitable burning mixture for each working cycles of gasoline engine cylinder, can reduce noxious gas emission
Value.
In above-mentioned two-stroke gasoline engine cylinder, the rectangular in cross-section of the exhaust outlet, the four of the exhaust outlet inner wall
A corner is in arc transition, and rounding off on the upside of the two sides of the dredging flow groove and the exhaust outlet, the dredging flow groove is by close
One end of the combustion chamber to other end height is gradually reduced.Four corners of exhaust outlet inner wall and two sides and the exhaust of dredging flow groove
Equal rounding off, can be such that these positions facilitate with other components and be connected on the upside of mouthful, and exhaust gas discharge can also be made more smooth；Aerial drainage
Slot is gradually reduced by one end close to combustion chamber to other end height, and the exhaust gas for excluding dredging flow groove and exhaust outlet shares a row
Gas channel, this is improved on regular cyclical without too big change, can save rectification cost.
Compared with prior art, the middle position in the utility model on the upside of exhaust outlet is provided with dredging flow groove, such to set
Meter can allow exhaust outlet of gasoline engine cylinder on the basis of existing to be opened in advance, and late release, intake and exhaust speed is improved,
The power and durability for making gasoline engine are optimized；What dredging flow groove was discharged in advance is the exhaust gas of after-flame, is both sides on the upside of exhaust outlet
Uncombusted gas has striven for burning time, so exhaust gas discharge value reduces, high fuel economy is improved.
Detailed description of the invention
Fig. 1 is the cross-sectional view of this two-stroke gasoline engine cylinder.
Cross-sectional view when Fig. 2 is this two-stroke gasoline engine cylinder label parameters code.
Fig. 3 is the cross-sectional view at another visual angle of this two-stroke gasoline engine cylinder.
In figure, 1, cylinder body；11, scavenging air belt；12, combustion chamber；13, exhaust outlet；14, dredging flow groove.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1, the two-stroke gasoline engine cylinder in the present embodiment, including cylinder body 1, it is spaced apart on the inner wall of cylinder body 1
There are several vertically arranged scavenging air belts 11, scavenging air belt 11 extends along the middle part of cylinder body 1 to the lower end of cylinder body 1；The top of cylinder body 1 is set
There is the combustion chamber 12 for burn combustible mixed gas；The exhaust outlet for after-flame exhaust gas to be discharged is provided in the middle part of the side wall of cylinder body 1
13 and the dredging flow groove 14 that is connected to exhaust outlet 13, dredging flow groove 14 be located at the middle position of 13 upside of exhaust outlet；It burns combustion chamber 12
The exhaust gas that burning mixture generates can flow downwardly into the middle position of 13 upside of exhaust outlet, exhaust outlet from the center of combustion chamber 12
13 upsides are intermediate to be provided with dredging flow groove 14, and when 14 position of dredging flow groove is opened, exhaust gas can shift to an earlier date to be discharged from dredging flow groove 14, uncombusted
Gas can burn away on the both sides of 13 upside of exhaust outlet, and when exhaust outlet 13 is opened, 13 upside both sides of exhaust outlet are uncombusted
Gas after-flame can be discharged at exhaust gas from exhaust outlet 13.
As shown in Figure 1 to Figure 3, exhaust outlet 13 is the strip-shaped hole being laterally arranged, the rectangular in cross-section of exhaust outlet 13 and exhaust
Four corners of 13 inner walls of mouth are in arc transition；14 section of dredging flow groove is arc-shaped and the two sides of dredging flow groove 14 and exhaust outlet 13
Upside rounding off, dredging flow groove 14 by close to the combustion chamber 12 one end to the other end height be gradually reduced, dredging flow groove 14 with
Exhaust outlet 13 shares an exhaust passage.
As shown in Fig. 2, A indicates the height of exhaust outlet 13, B indicates that the width of exhaust outlet 13, X indicate the width of dredging flow groove 14
Degree, Y indicate that the height of dredging flow groove 14, the height of dredging flow groove 14 are 1.5~2.5mm, preferably 2.0mm；The width of dredging flow groove 14
It is the 20%~30% of 13 width of exhaust outlet, preferably 20%, 22%, 24%, 26%, 28% or 30%.Setting can make in this way
When dredging flow groove 14 is opened, the exhaust gas that combustion chamber 12 generates all is passed through into dredging flow groove 14 as far as possible and is discharged, will not be made uncombusted
Gas enter the time for having striven for more burnings in dredging flow groove 14 and for uncombusted gas, optimize gasoline engine durability,
The big index of power, discharge, fuel economy etc. four.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (5)
1. a kind of two-stroke gasoline engine cylinder, including cylinder body (1), it is provided with what several were spaced apart on the inner wall of the cylinder body (1)
Scavenging air belt (11), cylinder body (1) top is equipped with the combustion chamber (12) for combust mixed gas, in the middle part of the cylinder body (1)
The exhaust outlet (13) for after-flame exhaust gas to be discharged is provided on side wall；It is characterized in that, be also provided on the side wall of the cylinder body (1) with
The dredging flow groove (14) of exhaust outlet (13) connection, the dredging flow groove (14) are located at the interposition on the upside of the exhaust outlet (13)
It sets.
2. two-stroke gasoline engine cylinder according to claim 1, which is characterized in that the section of the dredging flow groove (14) is in circle
Arc, the height of the dredging flow groove (14) are 1.5~2.5mm.
3. two-stroke gasoline engine cylinder according to claim 2, which is characterized in that the exhaust outlet (13) is laterally setting
Strip-shaped hole, dredging flow groove (14) width is the 20%~30% of the exhaust outlet (13) width.
4. two-stroke gasoline engine cylinder according to claim 3, which is characterized in that the scavenging air belt (11) is along the cylinder body
(1) inner wall is vertically arranged, and the scavenging air belt (11) extends from the cylinder body (1) middle part to the lower end of the cylinder body (1).
5. two-stroke gasoline engine cylinder according to claim 3, which is characterized in that the section of the exhaust outlet (13) is in square
Shape, four corners of exhaust outlet (13) inner wall are in arc transition, the two sides of the dredging flow groove (14) and the exhaust outlet
(13) upside rounding off, the dredging flow groove (14) are gradually subtracted by one end to the other end height close to the combustion chamber (12)
It is small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920570849.0U CN209724506U (en) | 2019-04-24 | 2019-04-24 | A kind of two-stroke gasoline engine cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920570849.0U CN209724506U (en) | 2019-04-24 | 2019-04-24 | A kind of two-stroke gasoline engine cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209724506U true CN209724506U (en) | 2019-12-03 |
Family
ID=68673691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920570849.0U Active CN209724506U (en) | 2019-04-24 | 2019-04-24 | A kind of two-stroke gasoline engine cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209724506U (en) |
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2019
- 2019-04-24 CN CN201920570849.0U patent/CN209724506U/en active Active
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