CN207297186U - A kind of scavenging air belt of two stroke engine - Google Patents
A kind of scavenging air belt of two stroke engine Download PDFInfo
- Publication number
- CN207297186U CN207297186U CN201721073359.7U CN201721073359U CN207297186U CN 207297186 U CN207297186 U CN 207297186U CN 201721073359 U CN201721073359 U CN 201721073359U CN 207297186 U CN207297186 U CN 207297186U
- Authority
- CN
- China
- Prior art keywords
- scavenging air
- air belt
- cavity
- cylinder block
- stroke engine
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of scavenging air belt of two stroke engine, including：The scavenging air belt is L-shaped, and one end of scavenging air belt is communicated with the inner cavity of the cylinder block, and the other end of scavenging air belt is communicated through cylinder block with being arranged on the crankcase of cylinder block lower part；Turning angle on the scavenging air belt close to the cylinder intracoelomic cavity is arranged to arc chord angle.By the above-mentioned means, the utility model can ensure that air-flow operation is smooth in exhaust process is swept, extend the spray angle and development length of air-flow.
Description
Technical field
Engine art is the utility model is related to, more particularly to a kind of scavenging air belt of two stroke engine.
Background technology
In order to make two stroke engine more fuel-efficient, exhaust gas discharge is more cleaned, the technology path used both at home and abroad in this field
One of be design and improve two stroke engine combustion chamber and sweep exhaust mode, to improve the efficiency of combustion of combustible gas, subtract
The escape of few combustible gas.When two stroke engine works, the process such as its air inlet, scavenging, compression, combustible gas explosion, exhaust is in gas
The streamline field of an air-flow is formed in cylinder（The flow trace of gas molecule）.Two stroke engine is swept exhaust stream and to be complied fully with
The streamline form of perfect condition is difficult.Using the two stroke engine of layered scavenging mode, it is expected in scavenging air belt suction and
The air and fuel gas scanned out can compare clearly laminar flow.Exhaust stream is swept as far as possible by preferable streamline form fortune in order to allow
It is dynamic, it is desirable to which that the air-flow of spirt cylinder can muchly keep its spray angle and development length from scavenging air belt.
The scavenging passage of the layered scavenging two-stroke engine of existing Patent No. CN201120406442.8, it is arranged on
Cylinder block both sides, a main scavenging air belt and a secondary scavenging air belt are included per side, is set between main scavenging air belt and secondary scavenging air belt
There is one to be used for its distinct partition plate.Using above structure, can make to sweep exhaust process closer to preferably in cylinder
Streamline（Flow field）Form, the escape loss smaller of combustible gas, discharge are more cleaned；But the scavenging air belt of the patent is sharp at turning
Angle is suddenly turned round, and air motion can produce more serious turbulent flow in scavenging process, and air-flow operation is obstructed, influences the injection of air-flow
, easily there is carbon distribution around the corner in angle and development length.
Utility model content
The utility model, can be in scavenging mainly solving the technical problems that provide a kind of scavenging air belt of two stroke engine
During ensure air-flow operation it is smooth, extend the spray angle and development length of air-flow.
In order to solve the above technical problems, the technical solution that the utility model uses is：A kind of two-stroke is provided to start
The scavenging air belt of machine, including：The scavenging air belt is L-shaped, and one end of scavenging air belt is communicated with the inner cavity of the cylinder block, scavenging air belt it is another
One end is communicated through cylinder block with being arranged on the crankcase of cylinder block lower part；Close to the cylinder intracoelomic cavity on the scavenging air belt
Turning angle is arranged to arc chord angle.
Preferably, the scavenging air belt includes the first cavity and the second cavity；First cavity extends transversely through the cylinder
The cylinder wall of body, first cavity one end are communicated with the inner cavity of the cylinder block, and the other end of the first cavity, which is provided with, closes the end
Cover board；Second cavity is vertically arranged in the cylinder wall of the cylinder block, the second cavity upper end and first cavity
Communicate, the second cavity lower end is communicated through cylinder block with crankcase.
Preferably, the cover board is plane cover board.
Preferably, partition plate is provided with first cavity, scavenging air belt is divided into main scavenging air belt and secondary scavenging air belt by partition plate, main
Scavenging air belt and secondary scavenging air belt are separate.
The beneficial effects of the utility model are：The utility model can ensure that air-flow operation is smooth in exhaust process is swept,
It is less to produce turbulent flow, extend the spray angle and development length of air-flow, be not easy carbon distribution occur around the corner；Its is simple in structure,
Handling ease.
Brief description of the drawings
Fig. 1 is a kind of schematic cross-sectional view of one preferred embodiment of scavenging air belt of two stroke engine of the utility model.
The mark of each component is as follows in attached drawing：1st, cylinder block；2nd, the first cavity；3rd, the second cavity；4th, turning angle；5th, plane
Cover board.
Embodiment
The preferred embodiment to the utility model is described in detail below in conjunction with the accompanying drawings, so that the advantages of the utility model
It can be easier to be readily appreciated by one skilled in the art with feature, so as to make the scope of protection of the utility model apparent clear and definite
Define.
Referring to Fig. 1, the utility model embodiment includes：
A kind of scavenging air belt of two stroke engine, including：The scavenging air belt is L-shaped, one end of scavenging air belt and the cylinder
The inner cavity of body 1 communicates, and the other end of scavenging air belt is communicated with the outside of cylinder block 1；On the scavenging air belt in the cylinder block 1
The turning angle 4 of chamber is arranged to arc chord angle；The resistance that air-flow flowing is subject to can be reduced in exhaust process is swept, ensure air-flow operation
It is smooth, extend the spray angle and development length of air-flow.The scavenging air belt includes the first cavity 2 and the second cavity 3；Described first
Cavity 2 extends transversely through the cylinder wall of the cylinder block 1, and 2 one end of the first cavity is communicated with the inner cavity of the cylinder block 1, and first is empty
The other end of chamber 2 is provided with the plane cover board 5 for closing the end；Second cavity 3 is vertically arranged in the cylinder of the cylinder block 1
In wall, 3 upper end of the second cavity is communicated with first cavity 2, and 3 lower end of the second cavity communicates phase through cylinder block 1 with crankcase
It is logical.Partition plate is provided with first cavity 2, scavenging air belt is divided into main scavenging air belt and secondary scavenging air belt, main scavenging air belt and pair by partition plate
Scavenging air belt is separate.
The utility model can ensure that air-flow operation is smooth in exhaust process is swept, less to produce turbulent flow, extend air-flow
Spray angle and development length, are not easy carbon distribution occur around the corner；Its simple in structure, handling ease.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly used in
Other related technical areas, are equally included in the patent within the scope of the utility model.
Claims (4)
1. a kind of scavenging air belt of two stroke engine, it is arranged on cylinder block both sides, it is characterised in that：The scavenging air belt is L-shaped,
One end of scavenging air belt is communicated with the inner cavity of the cylinder block, and the other end of scavenging air belt through cylinder block and is arranged on cylinder block lower part
Crankcase communicate；Turning angle on the scavenging air belt close to the cylinder intracoelomic cavity is arranged to arc chord angle.
A kind of 2. scavenging air belt of two stroke engine according to claim 1, it is characterised in that：The scavenging air belt includes the
One cavity and the second cavity；First cavity extends transversely through the cylinder wall of the cylinder block, first cavity one end and the vapour
The inner cavity of cylinder body communicates, and the other end of the first cavity is provided with the cover board for closing the end；Second cavity is vertically arranged in institute
State in the cylinder wall of cylinder block, the second cavity upper end is communicated with first cavity, and the second cavity lower end passes through cylinder block and song
Axle box communicates.
A kind of 3. scavenging air belt of two stroke engine according to claim 2, it is characterised in that：The cover board is plane cover
Plate.
A kind of 4. scavenging air belt of two stroke engine according to claim 2, it is characterised in that：Set in first cavity
Partition plate is equipped with, scavenging air belt is divided into main scavenging air belt and secondary scavenging air belt by partition plate, and main scavenging air belt and secondary scavenging air belt are separate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721073359.7U CN207297186U (en) | 2017-08-25 | 2017-08-25 | A kind of scavenging air belt of two stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721073359.7U CN207297186U (en) | 2017-08-25 | 2017-08-25 | A kind of scavenging air belt of two stroke engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207297186U true CN207297186U (en) | 2018-05-01 |
Family
ID=62438918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721073359.7U Expired - Fee Related CN207297186U (en) | 2017-08-25 | 2017-08-25 | A kind of scavenging air belt of two stroke engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207297186U (en) |
-
2017
- 2017-08-25 CN CN201721073359.7U patent/CN207297186U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20190825 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |