CN2830664Y - 4-scavenging duct, 2-stroke engine cylinder - Google Patents
4-scavenging duct, 2-stroke engine cylinder Download PDFInfo
- Publication number
- CN2830664Y CN2830664Y CN 200520045883 CN200520045883U CN2830664Y CN 2830664 Y CN2830664 Y CN 2830664Y CN 200520045883 CN200520045883 CN 200520045883 CN 200520045883 U CN200520045883 U CN 200520045883U CN 2830664 Y CN2830664 Y CN 2830664Y
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- Prior art keywords
- scavenging
- included angle
- cylinder
- scavenging air
- stroke engine
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Abstract
The utility model discloses a four-scavenging duct two-stroke engine cylinder, which is characterized in that a cylinder body is provided with four scavenging ducts, wherein the included angle phi 2 of the central lines of two of the scavenging ducts is from 60 to 90 DEG; the included angle phi 1 of the central lines of the other two of the scavenging ducts is from 90 to 140 DEG. The difference of the included angle phi 1 and the included angle phi 2 is from 10 to 40 DEG. Fresh combustible gas flows into the cylinder from the four scavenging ducts in different angles, a long time and a long path to carry out scavenging opeation, so the exhaust gas is scavenged more thoroughly, and the escape of combustible gas is reduced; the mixation of fuel and air is more sufficient. After Used, the utility model can make the exhaust emission cleaner; power is enhanced and oil consumption is reduced.
Description
Technical field
The utility model relates to motor, particularly a kind of four scavenging air belt two stroke engine cylinders.
Background technique
Two stroke engine cylinder cross section of the prior art (Fig. 2) is distributing each scavenging air belt of bilateral symmetry, the width of scavenging air belt is that N. is in order to make the air current flow that sweeps into cylinder unimpeded, it is enough big that width N wants, but because scavenging air belt is wide, only under the guide functions of sidewall, could pour cylinder by the scavenging direction of setting along near the airflow flowing scavenging air belt sidewall, and the air-flow that is in the scavenging air belt intermediate flow will pour cylinder with the state of unordered turbulent flow, the combustible gas of these turbulent conditions has not just been escaped from relief opening when also bearing the work of cleaning waste gas, and because scavenge flow has only a direction to rush in cylinder, be difficult to thoroughly the cleaning of the waste gas at each position in the cylinder, make engine operation efficient reduce, oil consumption increases, and pollution from exhaust emission is serious.
Summary of the invention
The purpose of this utility model is a kind of four scavenging air belt two stroke engine cylinders that design at the deficiencies in the prior art, the quantity that it can make the inflammable mixture that fills into escape from relief opening reduces, the waste gas of sweeping in the pure qi (oxygen) cylinder is more thorough, fuel and air mixing more even.Make the toxic emission of motor cleaner, power increases, and oil consumption reduces.
The concrete technological scheme that realizes the utility model purpose is: a kind of four scavenging air belt two stroke engine cylinders, characteristics are that cylinder block is provided with four scavenging air belts, being 60-90 ° near two scavenging air belt d1, the d2 center line included angle 2 of relief opening wherein, is 90-140 ° away from two scavenging air belt e1, the e2 center line included angle 1 of relief opening; Described included angle 1 is 10-40 ° with the difference of φ 2.
The utility model has reduced the escape of combustible gas, makes cleaning waste gas more thorough, and fuel and air mixing are more abundant, make toxic emission cleaner, and power increases, and oil consumption reduces.
Description of drawings
Fig. 1 is the utility model cross sectional representation
Fig. 2 is existing cylinder air flow direction schematic representation
Fig. 3 is the utility model air flow direction schematic representation
Embodiment
Consult Fig. 1, four scavenging air belt d1.d2.e1.e2 of the utility model distribute along the center line both sides of cylinder exhaust port F, and two scavenging air belt d1 and d2 center line angle are φ 2; Article two, scavenging air belt e1 and e2 center line angle are φ 1; Included angle 2 is set to 60-90 ° of included angle 1 and is set to 90-140 °, and φ 1 is set to 10-40 ° with the difference of φ 2.
Consult Fig. 2, Fig. 3, the utility model is monolateral two scavenging air belts, and N is similar in the width sum Md+Me of two scavenging air belts and the prior art, so its resistance can not increase air communication and cross scavenging air belt and enter cylinder the time.But in gas flow, added a guide plate G because a scavenging air belt split into to resemble behind two scavenging air belts, made air-flow rush in cylinder along the direction of setting more accurately.Scavenging air belt d1, d2 are near from relief opening F, the combustible gas stream that fills inlet casing from these two scavenging air belts is easier escapes from relief opening F, so make included angle 2 smaller, it is almost opposite with the direction of exhaust outlet F to make these two strands of scavenge flows pour the direction of cylinder, make the fresh combustible gas air-flow reverse reflux that pours cylinder longer, thereby just reduced the escape of combustible gas to path and the time of relief opening F.Scavenging air belt e1, e2 is far away from relief opening F, compares with d1, d2 to be not easy to allow the fresh combustible gas stream that pours cylinder escape from relief opening F, so the angle of φ 1 can be greatly.And the angle of φ 1 and φ 2 differs bigger, and pouring the air-flow of cylinder from e1, e2 like this can be from the waste gas the different scavenging angle cleaning cylinders.Because from d1, d2, the fresh combustible gas that four scavenging air belts of e1, e2 flow to cylinder is with different angles, and scavenging is carried out in longer time and path, also makes the more abundant of fuel and air mixing.
Claims (2)
1, a kind of four scavenging air belt two stroke engine cylinders is characterized in that cylinder block is provided with four scavenging air belts, and wherein two scavenging air belts (d1), (d2) center line included angle 2 are 60-90 °, and two scavenging air belts (e1), (e2) center line included angle 1 are 90-140 °.
2, four scavenging air belt two stroke engine cylinders according to claim 1 is characterized in that described included angle 1 and the difference of φ 2 are 10-40 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520045883 CN2830664Y (en) | 2005-10-25 | 2005-10-25 | 4-scavenging duct, 2-stroke engine cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520045883 CN2830664Y (en) | 2005-10-25 | 2005-10-25 | 4-scavenging duct, 2-stroke engine cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2830664Y true CN2830664Y (en) | 2006-10-25 |
Family
ID=37135591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520045883 Expired - Fee Related CN2830664Y (en) | 2005-10-25 | 2005-10-25 | 4-scavenging duct, 2-stroke engine cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2830664Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649770B (en) * | 2008-08-12 | 2012-07-18 | 日立工机株式会社 | Two cycle engine and tool |
-
2005
- 2005-10-25 CN CN 200520045883 patent/CN2830664Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649770B (en) * | 2008-08-12 | 2012-07-18 | 日立工机株式会社 | Two cycle engine and tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061025 Termination date: 20101025 |