CN2428574Y - Cam shaft - Google Patents
Cam shaft Download PDFInfo
- Publication number
- CN2428574Y CN2428574Y CN 00230208 CN00230208U CN2428574Y CN 2428574 Y CN2428574 Y CN 2428574Y CN 00230208 CN00230208 CN 00230208 CN 00230208 U CN00230208 U CN 00230208U CN 2428574 Y CN2428574 Y CN 2428574Y
- Authority
- CN
- China
- Prior art keywords
- cam shaft
- fuel injection
- diesel engine
- camshaft
- model
- 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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- Valve-Gear Or Valve Arrangements (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model relates to a cam shaft of a diesel engine, characterized in that the cam shaft contacts the pump oil surface of an oil pump to form a convex shape. The tangent plane of the cam shaft of the traditional diesel engine is changed to form a convex face. The speed of fuel injection is decelerated without changing the period of fuel injection, and high noise generated by high-speed fuel injection can be relieved. The utility model has the advantages of reasonable structural design and simple operation and improves the noise generated by fuel injection without increasing cost.
Description
The utility model belongs to the diesel engine field, particularly a kind of improvement of cam shaft for diesel engine.
The invention of internal-combustion engine brings great convenience for production and life, and power source is provided, and is widely used in fields such as communications and transportation, generating, water conservancy irrigation.Internal-combustion engine can be divided into two big classes, also is gasoline engine and diesel engine, and gasoline engine development is fast, excellent performance, but its manufacture process requirement height, operating cost height, so be difficult to the market of replacement diesel engine.And diesel engine promptly has the characteristics that structure is simple relatively, operating cost is low, but noise is big during operation, has restricted its application, how to overcome the noise of internal-combustion engine, and particularly the noise of diesel engine has become the problem of many mechanisms research.The noise source of internal-combustion engine comprises following several respects at least: the noise that the sound that suction and discharge are sent, oil spout sound, combustion explosion sound and mechanical transmission produce.Solving noise, need take all factors into consideration the problem of above several respects, is exhaust noise and study maximum at present, unilaterally solved exhaust noise, but another noise source highlights again.The existing diesel oil spout sound is big and rapid, and studying carefully its reasons in structure is that the camshaft tangent plane removes to contact oil pump pump oil, produces the moment detonation high noisy that causes of oil spout rapidly.Camshaft end face such as Fig. 1 are as showing, its tangent plane 1 is for contacting the pump pasta, and arrow is represented the sense of rotation of cam.
The purpose of this utility model is the deficiency that overcomes prior art, design a kind of pump oil steady and camshaft.
Task of the present utility model is achieved in that a kind of camshaft, it is characterized in that the pump pasta that camshaft touches oil pump becomes protruding abdomen shape.Make tangent plane into the protruding outside of belly, under the situation that does not change injection period, slowed down oil spout speed, relaxed the high speed oil spout and produced the big noise that detonation is sent.
The utlity model has reasonable in design, make simplely, change fuel injection characteristic not increasing under the condition of cost, reduce the noise that detonation produces.
Below in conjunction with concrete legend the utility model is described further:
Fig. 1 is a prior art camshaft end view drawing
Fig. 2 is the utility model camshaft end view drawing
With reference to Fig. 2, camshaft end view drawing of the present utility model, camshaft 2 contact the pump pasta and become protruding abdomen shape 3, can effectively slow down the speed of oil spout.Arrow is represented the sense of rotation of camshaft among the figure.Use on the diesel engine of the camshaft of this structure applicable to models such as GB S195, S1100, S1102, S1110, S1115, S1125.
Claims (1)
1, a kind of camshaft is characterized in that the pump pasta that camshaft touches oil pump becomes protruding abdomen shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00230208 CN2428574Y (en) | 2000-06-16 | 2000-06-16 | Cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00230208 CN2428574Y (en) | 2000-06-16 | 2000-06-16 | Cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2428574Y true CN2428574Y (en) | 2001-05-02 |
Family
ID=33593343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00230208 Expired - Fee Related CN2428574Y (en) | 2000-06-16 | 2000-06-16 | Cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2428574Y (en) |
-
2000
- 2000-06-16 CN CN 00230208 patent/CN2428574Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |