CN2858977Y - Two-stroke internal combustion engine cylinder - Google Patents
Two-stroke internal combustion engine cylinder Download PDFInfo
- Publication number
- CN2858977Y CN2858977Y CN 200520047631 CN200520047631U CN2858977Y CN 2858977 Y CN2858977 Y CN 2858977Y CN 200520047631 CN200520047631 CN 200520047631 CN 200520047631 U CN200520047631 U CN 200520047631U CN 2858977 Y CN2858977 Y CN 2858977Y
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- CN
- China
- Prior art keywords
- cylinder
- scavenging
- scavenging air
- pair
- air belt
- 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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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Supercharger (AREA)
Abstract
A two-stroke internal combustion engine cylinder pertains to design and application technology field of internal combustion engine cylinder. It is characterized in that, two scavenging ducts formed by two pairs of planes with the same angle intersect at the center line of the cylinder along the extension line of wall border line respectively, to form two respective angles A1 and A2 which are smaller than the angle in prior art. Thereby reduces the angle between the entry point direction in which the airflow enters the cylinder and the tangential direction from the point along the cylinder wall, decreases scavenging dead core space formed with the cylinder wall, and makes the air flow enters along the cylinder wall and the scavenging to be more effective and sufficient. The utility model increases power, improves performance and is a very good improved design.
Description
Technical field:
Belong to cylinder of internal combustion engine design and applied technical field; Exactly be a kind of little discharge capacity, high-revolving two stroke IC engine cylinder.
Background technique:
At present, be used for the cylinder configuration of small two-cycle engines, a pair of symmetrical scavenging air belt is arranged; And relief opening and suction port are arranged, each face-off formula is distributed on the casing wall; Relief opening and suction port upper-lower position stagger, and relief opening is last, and suction port is following.Because scavenging air belt is shaped as the angle that the bearing of trend of the airway walls on single air flue, air flue both sides forms and is respectively 110 degree and 119 degree on cylinder center; When the aspirating stroke of two stroke IC engine work, new mixed air enters cylinder along steam passage wall two angle of intersection degree line directions, because angle is excessive, new mixed air flows to into the angle of the point of penetration direction of cylinder and the formation of this casing wall tangent line bigger, so the scavenging dead-space volume that causes two angle of intersection degree lines and casing wall to form is bigger; Simultaneously owing to be that single air flue, new mixed air total airflow flow to joint and comparatively all easily cause new mixed air directly to overflow the short-circuit loss that relief opening causes new mixed air near the head-on collision and the inlet stream of cylinder block gas port direction, charge air flow in the bounce-back of casing wall, thus the two stroke IC engine that uses now scavenging efficiency when work is lower, the short-circuit loss of new mixed air big (30%-40%) thus influence power, the HC of two stroke IC engine discharging, reach fuel economy.
Summary of the invention:
The utility model provides a kind of scavenging efficiency height, and short-circuit loss is little, a kind of two stroke IC engine cylinder that fuel economy is good.
The technological scheme that the utility model is taked:
A kind of two stroke IC engine cylinder, two pairs of scavenging air belts are arranged in the cylinder body, the technical program is: be symmetrically distributed in the scavenging air belt on the casing wall, near relief opening be first pair of scavenging air belt, away from relief opening be second pair of scavenging air belt, every pair all with the scavenging air belt of the plane formation of equal angular separately, respectively along the elongation line in wall sideline, intersect at center line of cylinder, constitute two included angle A 1 separately, A2; First pair of scavenging air belt sideline elongation line included angle A 1 is 60 degree-69 degree; Second pair of scavenging air belt sideline elongation line, included angle A 2 are 96 degree-119 degree.
Good effect behind enforcement the utility model is:
During two stroke IC engine work, in the aspirating stroke owing to adopt two pairs of scavenging air belts to force new mixed air along included angle A 1, the arm of angle line direction of A2 enters cylinder, because A1 of the present utility model, the A2 angle is littler than angle in the past, the point of penetration direction and this casing wall tangent direction angle that make air-flow enter cylinder diminish, thus reduce with scavenging dead-space volume that casing wall forms, inlet stream makes its scavenging can be more effective, abundant along the casing wall air inlet.
Implement that the utility model can improve the power 5%-10% of rated speed point, HC effluent concentration 10%-18% when HC effluent concentration 10%-15%, rated speed when improving the two stroke IC engine idling, the fuel economy rate of fuel consumption of two stroke IC engine reduces 10%-21% when improving rated speed simultaneously.
Description of drawings:
Fig. 1 is a cylinder graphics of the present utility model.
Fig. 2 is the graphics of existing cylinder.
Fig. 3 is a cylinder plan view of the present utility model.
Fig. 4 is the plan view of existing cylinder.
Fig. 5 is a cylinder sectional view of the present utility model.
Embodiment: existing the utility model is described in further detail in conjunction with the accompanying drawings
A kind of two stroke IC engine cylinder, two pairs of scavenging air belts are arranged in the cylinder body, they are the scavenging air belts that are symmetrically distributed on the casing wall, near relief opening is first pair of scavenging air belt 4, away from relief opening be second pair of scavenging air belt 5, every pair of scavenging air belt that all constitutes with the plane of equal angular separately is respectively along the elongation line in wall sideline, intersect at cylinder center, constitute two included angle A 1 separately; A2.First couple of scavenging air belt sideline elongation line included angle A 1 ∠ 6 is 60 degree-69 degree; Second pair of scavenging air belt sideline elongation line, included angle A 2 ∠ 7 are 96 degree-119 degree.
Cylinder scavenging road shape 2 of the present utility model, cylinder scavenging road interlayer 1, first pair of scavenging air belt of cylinder extends in cylinder center included angle A 1 ∠ 6, and second pair of scavenging air belt of cylinder extends in cylinder center included angle A 2 ∠ 7 and all rely on the casting forming of die casting mould on die casting machine to implement.
2 is cylinder scavenging road shapes of the present utility model, the 1st among the figure, the vapour of utility model Cylinder scavenging air belt interlayer, the 3rd, existing cylinder scavenging road shape, the 4th, cylinder of the present utility model The first pair of scavenging air belt, the 5th, second pair of scavenging air belt of cylinder of the present utility model, ∠ 6 are these realities First pair of scavenging air belt with novel cylinder extends in the cylinder center angle, ∠ 7 is these practicalities Second pair of scavenging air belt of novel cylinder extends in cylinder center angle, the 8th, existing cylinder Scavenging air belt extend in cylinder center angle, the 9th, existing vapour near one side of exhaust outlet The scavenging air belt of cylinder extends in cylinder center angle, the 10th, this reality away from one side of exhaust outlet With the air inlet, the 11st of novel cylinder, the exhaust outlet of cylinder of the present utility model.
Claims (2)
1. two stroke IC engine cylinder, comprise two pairs of scavenging air belts are arranged in the cylinder body, it is characterized in that: be symmetrically distributed in the scavenging air belt on the casing wall, near relief opening is first pair of scavenging air belt (4), away from relief opening be second pair of scavenging air belt (5), every pair of scavenging air belt that all constitutes with the plane of equal angular separately is respectively along the elongation line in wall sideline, intersect at cylinder center, constitute two included angle A 1 separately; A2.
2, cylinder of internal combustion engine according to claim 1 is characterized in that: two included angle A 1 separately of described formation; A2 is: first pair of scavenging air belt sideline elongation line included angle A 1 (∠ 6) is 60 degree-69 degree; Second pair of scavenging air belt sideline elongation line, included angle A 2 (∠ 7) are 96 degree-119 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520047631 CN2858977Y (en) | 2005-12-19 | 2005-12-19 | Two-stroke internal combustion engine cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520047631 CN2858977Y (en) | 2005-12-19 | 2005-12-19 | Two-stroke internal combustion engine cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2858977Y true CN2858977Y (en) | 2007-01-17 |
Family
ID=37611837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520047631 Expired - Fee Related CN2858977Y (en) | 2005-12-19 | 2005-12-19 | Two-stroke internal combustion engine cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2858977Y (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
- 2005-12-19 CN CN 200520047631 patent/CN2858977Y/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 | ||
| ASS | Succession or assignment of patent right |
Owner name: SUZHOU HONGBEN MACHINERY MANUFACTURING CO., LTD. Free format text: FORMER OWNER: SHANGHAI HONGYOU INDUSTRIAL CO., LTD. Effective date: 20091113 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091113 Address after: No. 300, Yan Bang Road, Kunshan hi tech Development Zone, Jiangsu, China: 215347 Patentee after: Huzhou Honbase Machinery Manufacturing Co., Ltd. Address before: Shuang Ding road Shanghai city Jiading District Malu Town No. 175, zip code: 201801 Patentee before: Shanghai Hongyou Industry Co., Ltd. |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |