CN2546632Y - Internal combustion engine distribution cam - Google Patents
Internal combustion engine distribution cam Download PDFInfo
- Publication number
- CN2546632Y CN2546632Y CN 01249461 CN01249461U CN2546632Y CN 2546632 Y CN2546632 Y CN 2546632Y CN 01249461 CN01249461 CN 01249461 CN 01249461 U CN01249461 U CN 01249461U CN 2546632 Y CN2546632 Y CN 2546632Y
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- CN
- China
- Prior art keywords
- cam
- lift
- combustion engine
- internal combustion
- valve
- 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)
- Gears, Cams (AREA)
Abstract
Disclosed is a valve cam of an internal combustion engine; in particular to the profile design of the valve cam. The utility model aims to provide a cam with good power performance and low noise. Through improving the profile design of the cam, the valve cam of the internal combustion engine concludes a radius which is from 11mm to 17 mm of a base circle and a lift value range which is from 0.00000 to 7.52000 mm according to the cam profile equation of a hyperbolic deformation function. Each lift value is concluded by every 5 degree. The plentiful coefficient of the valve cam basing on the design in the utility model is higher than 0.62. The internal combustion engine has the characteristics including good charging performance, good power performance, stable running and small vibration. The power of a diesel engine is increased by 8 percent, the oil consumption rate is 5 gram per kilowatt-hour and the noise of the valve mechanism is reduced by 3db when applying the utility model in 75 and 95 series diesel engines.
Description
Technical field
The utility model relates to a kind of cam, refers to the molded lines design of IC engine gas distribution cam especially.
Background technique
The valve cam molded lines design of internal-combustion engine is related to cam fullness coefficient, inflation performance and power of IC engine, oil consumption and noise.Modern cam profile, mostly adopt multinomial power, compound cycloid or N subharmonic cam profile, these cam profile equations are the designing and calculating complexity not only, the higher derivative that has is discontinuous or equal 0, be difficult to improve the smoothness of operation of internal-combustion engine, optimize the back fullness coefficient and be difficult to reach 0.59, and the parameter of these cam profile equations has nothing to do with the Structure of Internal-Combustion Engine parameter, design parameter is difficult to adapt with internal-combustion engine structural dimensions parameter.Existing 75,95 serial internal-combustion engines because cam design is unsatisfactory, exists and vibrate big, the not high shortcoming of power character.
Summary of the invention
The purpose of this utility model provides a kind of IC engine gas distribution cam, especially improves the molded lines design of cam, to improve the power character of internal-combustion engine, reduces vibration and noise.
The design's main technical schemes is: according to the hyperbolic warping function cam profile equation that works out, the lift number range that calculates 0～90 ° on IC engine gas distribution cam is 0.00000～7.52000mm, per 5 degree are determined a lift numerical value, and lift numerical value EE Error Excepted is ± 5%.Wherein Base radius is that the lift number range of 0～90 ° on the 75 serial IC engine gas distribution cams of 11mm is 0.00000～6.03040mm; Base radius is that the lift number range of 0～90 ° on the 95 serial IC engine gas distribution cams of 17mm is 0.00000～7.52000mm.
According to the cam that the design's lift numerical value is produced, fullness coefficient is big, and diesel engine has inflation performance height, good dynamic property; The characteristics that running is steady, vibration is little.On diesel engine, use, can improve diesel engine power more than 8%, reduce fuel consumption rate 5 gram/kilowatt hours, reduce by 3 decibels of distribution device noises.
Description of drawings
Fig. 1 is the cam schematic representation;
Fig. 2 is an IC engine gas distribution cam-shaped design diagram.
Embodiment
See also Fig. 1, Fig. 2, among the figure, 1 is that cam, 2 is lift.Base radius is that R, lift numerical value are h.
Embodiment 1 Base radius R is the 75 serial internal combustion engine air-exhausting air-entering symmetrical cams of 11mm, calculates the lift numerical value h of 0～90 degree earlier according to hyperbolic warping function cam profile equation, gets following table.The lift numerical value symmetry of 90 °～180 ° lift numerical value and 90 °～0 °.Adopt steel or cast iron to carry out the machining moulding according to the lift numerical value that provides in the following table.The using planar measuring head is measured check.
Base radius R is that the 75 serial internal-combustion engines of 11mm cooperate cam lift numerical value (EE Error Excepted ± 5%)
Angle (°) lift (mm) angle (°) lift (mm)
0 0.00000 50 3.04634
10 0.00000 55 3.73997
15 0.00320 60 4.34749
20 0.05880 65 4.86295
25 0.14280 70 5.28432
30 0.24386 75 5.61134
35 0.73283 80 5.84437
40 1.48173 85 5.98393
45 2.28160 90 6.03040
Base radius R is that the 95 serial internal-combustion engines of 17mm cooperate cam lift numerical value (EE Error Excepted ± 5%)
Angle (°) lift (mm) angle (°) lift (mm)
0 0.00000 50 4.021660
55 4.850990
10 0.102399 60 5.570950
65 6.175810
20 0.230399 70 6.665450
30 0.488870 75 7.042080
35 1.195920 80 7.308520
40 2.128790 85 7.477300
45 3.100480 90 7.520000
Claims (3)
1. IC engine gas distribution cam, it is characterized in that: the molded lines design of cam (1) adopts hyperbolic warping function equation to calculate lift (2) numerical value of cam, the lift number range that valve cam is 0～90 ° is 0.00000～7.52000mm, and lift numerical value EE Error Excepted is ± 5%.
2. valve cam according to claim 1 is characterized in that, Base radius R is that the lift numerical value of 75 serial IC engine gas distribution cams of 11mm is as follows:
Angle (°) lift (mm) angle (°) lift (mm)
0 0.00000 50 3.04634
10 0.00000 55 3.73997
15 0.00320 60 4.34749
20 0.05880 65 4.86295
25 0.14280 70 5.28432
30 0.24386 75 5.61134
35 0.73283 80 5.84437
40 1.48173 85 5.98393
45 2.28160 90 6.03040
3. valve cam according to claim 1 is characterized in that, Base radius R is that the lift numerical value of 95 serial IC engine gas distribution cams of 17mm is as follows:
Angle (°) lift (mm) angle (°) lift (mm)
0 0.00000 50 4.021660
55 4.850990
10 0.102399 60 5.570950
65 6.175810
20 0.230399 70 6.665450
30 0.488870 75 7.042080
35 1.195920 80 7.308520
40 2.128790 85 7.477300
45 3.100480 90 7.520000
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01249461 CN2546632Y (en) | 2001-08-10 | 2001-08-10 | Internal combustion engine distribution cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01249461 CN2546632Y (en) | 2001-08-10 | 2001-08-10 | Internal combustion engine distribution cam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2546632Y true CN2546632Y (en) | 2003-04-23 |
Family
ID=33659846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01249461 Expired - Fee Related CN2546632Y (en) | 2001-08-10 | 2001-08-10 | Internal combustion engine distribution cam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2546632Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427723C (en) * | 2006-12-30 | 2008-10-22 | 重庆隆鑫工业（集团）有限公司 | Cam of motorcycle engine camshaft |
| CN101894179A (en) * | 2010-06-12 | 2010-11-24 | 上海理工大学 | Composite function cam molded line of gas distribution cam mechanism of internal combustion engine |
-
2001
- 2001-08-10 CN CN 01249461 patent/CN2546632Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427723C (en) * | 2006-12-30 | 2008-10-22 | 重庆隆鑫工业（集团）有限公司 | Cam of motorcycle engine camshaft |
| CN101894179A (en) * | 2010-06-12 | 2010-11-24 | 上海理工大学 | Composite function cam molded line of gas distribution cam mechanism of internal combustion engine |
| CN101894179B (en) * | 2010-06-12 | 2012-07-11 | 上海理工大学 | Composite function cam molded line of gas distribution cam mechanism of internal combustion engine |
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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 |