CN200978687Y - Cam structure of engine air valve actuating mechanism - Google Patents
Cam structure of engine air valve actuating mechanism Download PDFInfo
- Publication number
- CN200978687Y CN200978687Y CN 200620140067 CN200620140067U CN200978687Y CN 200978687 Y CN200978687 Y CN 200978687Y CN 200620140067 CN200620140067 CN 200620140067 CN 200620140067 U CN200620140067 U CN 200620140067U CN 200978687 Y CN200978687 Y CN 200978687Y
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- Prior art keywords
- valve
- cam structure
- cam
- camshaft
- design
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- Expired - Lifetime
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Abstract
The utility model belongs to the field of engines, in particular to a cam structure of an engine valve drive mechanism. The utility model comprises a camshaft and a gear fixedly sleeved on the camshaft, the camshaft is fixedly sleeved with two cams made integrally. The design of valve stroke is convenient and free through the utilization of the new double-cam structure, and the valve stroke design of the intake valve and the exhaust valve can be designed independently, the phase position and angular overlap of the valve stroke can also be made sure freely, the valve stroke is more easy to optimize. A mass of test data shows that through the utilization of the new cam structure, the engine performance is improved, the amplitude of the peal power and the acrot orque are respective 15 percents and 14.5 percents.
Description
Technical field:
The utility model belongs to engine art, the cam structure of particularly a kind of engine valve actuations mechanism.
Background technique:
Present domestic motorcycle engine mostly is the camshaft underneath type greatly, adopts single cam mechanism or twin cam shaft mechanism, because the twin cam shaft complex structure, volume is big, uses less on motorcycle.Single cam mechanism is simple in structure, can satisfy general motorcycle engine performance demands, but along with to the raising of motorcycle performance requirement and the strict demand of discharging, can't satisfy.We know, design outstanding valve lift by adjusting distribution device, can realize the performance boost of the each side of motor preferably.And the design of cam is an emphasis wherein, and the cam mechanism of an excellent in design can obtain optimized valve lift, thereby directly and significantly improves every performance of motor.And single cam mechanism is same owing to the inlet and outlet cam, and often after some valve lifts designed, another valve lift was also just decided, and can not be optimized again.Simultaneously, under the constant situation of valve lift, the overlapping angle of valve lift is uncontrollable, thereby has limited the optimal design of valve lift.
The model utility content:
The cam structure that the purpose of this utility model provides that intake and exhaust cam is separate, valve lift can make things convenient for a kind of engine valve actuations mechanism that freely designs.
Scheme of the present utility model is: comprise camshaft and the gear that is solidly set on the camshaft, camshaft is installed with two cams.
Above-mentioned two cams are made one.
The utility model has the advantages that: by adopting novel double-cam mechanism, make the design of valve lift convenient free, the valve lift of inlet and outlet door can design independently, and the phase place of lift and overlapping angle also can freely be determined, make the easier optimization of lift.A large amount of test datas shows employing new type of cam mechanism, and the performance of motor improves, and its peak output and Maximum Torque amplification are respectively 15% and 14.5%.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is the left view of Fig. 1.
Embodiment:
See figures.1.and.2, the cam structure of engine valve actuations mechanism is made up of camshaft, gear shaft 1, intake cam 2 and exhaust cam 3, and intake cam 2, exhaust cam 3 are conflicted with intake rocker, the exhaust rocker arm bottom of valve actuating mechanism respectively.Intake cam 2 and exhaust cam 3 are made one.Above-mentioned intake cam and exhaust cam also are used interchangeably.
Because intake cam and exhaust cam are independent, before making one, two cams can be designed to different shapes and phase angle; The design of valve lift is convenient free like this, and inlet and outlet door lift can design independently, and the phase place of lift and overlapping angle also can freely be determined, make the easier optimization of lift.A large amount of test datas shows employing new type of cam mechanism, and the performance of motor improves, and its peak output and Maximum Torque amplification are respectively 15% and 14.5%.In addition, intake rocker, exhaust rocker arm be corresponding intake cam and exhaust cam respectively, and the inlet and outlet cam is not easy to wear.
Claims (2)
1, the cam structure of a kind of engine valve actuations mechanism comprises camshaft and is solidly set on gear (1) on the camshaft, it is characterized in that camshaft is installed with two cams (2,3).
2, the cam structure of a kind of engine valve actuations according to claim 1 mechanism is characterized in that two cams (2,3) make one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620140067 CN200978687Y (en) | 2006-11-15 | 2006-11-15 | Cam structure of engine air valve actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620140067 CN200978687Y (en) | 2006-11-15 | 2006-11-15 | Cam structure of engine air valve actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200978687Y true CN200978687Y (en) | 2007-11-21 |
Family
ID=38979064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620140067 Expired - Lifetime CN200978687Y (en) | 2006-11-15 | 2006-11-15 | Cam structure of engine air valve actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200978687Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195531A (en) * | 2013-04-12 | 2013-07-10 | 东莞市振博节能环保科技有限公司 | Engine camshaft and operating method of engine utilizing same |
-
2006
- 2006-11-15 CN CN 200620140067 patent/CN200978687Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195531A (en) * | 2013-04-12 | 2013-07-10 | 东莞市振博节能环保科技有限公司 | Engine camshaft and operating method of engine utilizing same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071121 |
|
| EXPY | Termination of patent right or utility model |