CN204511548U - Petrol engine distribution device exhaust cam shaft - Google Patents
Petrol engine distribution device exhaust cam shaft Download PDFInfo
- Publication number
- CN204511548U CN204511548U CN201520140784.8U CN201520140784U CN204511548U CN 204511548 U CN204511548 U CN 204511548U CN 201520140784 U CN201520140784 U CN 201520140784U CN 204511548 U CN204511548 U CN 204511548U
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- Prior art keywords
- cam
- valve opening
- breeze way
- lift
- valve
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Abstract
The utility model discloses a kind of petrol engine distribution device exhaust cam shaft, comprise camshaft body (1), the axle journal of camshaft body (1) is provided with oilhole (2), cam profile is surrounded by camshaft basic circle and cam peach, comprise valve opening section (3), valve opening breeze way (4), closing flank (5) and valve-closing breeze way (6), the maximum lift h of cam is 9mm, minimum nose radius is 3.6717mm, the cam angle interval of described valve opening section (3) correspondence is 0 ° ~ 57.5 °, corresponding lift is 9mm ~ 0.3832mm, the cam angle interval that valve opening breeze way (4) is corresponding is 57.5 ° ~ 82 °, corresponding lift is 0.3832mm ~ 0mm, the cam angle interval that closing flank (5) is corresponding is 0 ° ~ 60 °, corresponding lift is 9mm ~ 0.3544mm, the cam angle interval that valve-closing breeze way (6) is corresponding is 60 ° ~ 84 °, corresponding lift is 0.3544mm ~ 0mm.By optimizing the molded line of exhaust cam shaft, with the working life of the output power and distribution device that improve motor, and reduce noise.
Description
Technical field
The utility model relates to petrol engine distribution device technical field, is specifically related to the exhaust cam shaft of petrol engine distribution device.
Background technique
The camshaft molded line of the distribution device that motor car engine inlet and outlet are used is related to the shearing stress of the fullness coefficient of cam, charging efficiency, the speed of valve opening and closing and acceleration, valve spring, cam and the contact stress of holding out, thus directly affect engine output, output torque and oil consumption, the working life of distribution device, sufficient combustion and vibrating noise etc.Energy prices skyrocket and Consumer to today of vehicle performance requirement harshness, each manufacturer be all devoted to research engine output higher, oil consumption is lower, the exhaust cam shaft of longer service life.
Traditional petrol engine distribution device exhaust cam shaft, for pursuing high output torque, improves cam lift, causes the decrement of valve spring to increase, the corresponding increase of the maximum shear stress of valve spring, have impact on the life-span of spring; Meanwhile, improve cam lift, minimum nose radius reduces, and causes cam to increase with the contact stress of holding out, and increases cam and the wearing and tearing of holding out, falls the working life of cam of knowing clearly; Exhaust cam shaft open side molded line is with to close side molded line symmetrical, and namely valve opening is consistent with the speed that valve closes, and exhaust efficiency is not high, and impact during valve-closing greatly, and noise is high.
Model utility content
The utility model is intended to the molded line optimizing petrol engine distribution device exhaust cam shaft, particularly exhaust cam shaft, with the working life of the output power and distribution device that improve motor, and reduces noise.
For this reason, the technological scheme that the utility model adopts is: a kind of petrol engine distribution device exhaust cam shaft, comprise camshaft body (1), the axle journal of described camshaft body (1) is provided with oilhole (2), described cam profile is surrounded by camshaft basic circle and cam peach, comprise valve opening section (3), valve opening breeze way (4), closing flank (5) and valve-closing breeze way (6), it is characterized in that: the maximum lift h of described cam is 8.4mm, minimum nose radius is 3.1613mm, the cam angle interval of described valve opening section (3) correspondence is 0 ° ~ 56 °, corresponding lift is 8.4mm ~ 0.3490mm, the cam angle interval that valve opening breeze way (4) is corresponding is 56 ° ~ 78.5 °, corresponding lift is 0.3490mm ~ 0mm, the cam angle interval that closing flank (5) is corresponding is 0 ° ~ 60 °, corresponding lift is 8.4mm ~ 0.3543mm, the cam angle interval that valve-closing breeze way (6) is corresponding is 60 ° ~ 81.5 °, corresponding lift is 0.3543mm ~ 0mm.
The port timing exhaust advance angle α 1 of described camshaft is 49 °, and port timing exhaust delay angles alpha 2 is 25 °, by optimizing the exhaust phase parallactic angle of camshaft, improving engine performance, functional reliability, prolongation engine life further and reducing oil consumption.
Oilhole (2) on described axle journal is arranged in pairs, and two oilholes (2) dead in line on same axle journal being communicated with, the external end head chamfering of each oilhole (2), is convenient to manufacturing, and ensures the normal work of exhaust cam shaft.
The utility model adopts open side and closes the asymmetrical cam profile structure in side, namely the angle of valve opening section is less than the angle of closing flank, the angle that the angle of valve opening breeze way opens breeze way than exhaust valve is slightly large, and the angle sum of valve opening section and valve opening breeze way is less than exhaust valve and opens the angle sum that section and exhaust valve open breeze way.Compared with existing symmetrical exhaust cam shaft molded line, there is the remarkable result of following two aspects:
(1) reduce the angle of valve opening section, valve is opened rapidly, be conducive to improving exhaust efficiency, exhaust effect is better, makes maximum output improve about 3.5Kw, and engine consumption reduces by more than 2%; Increase the angle of closing flank, reduce impact force during air valve drop, when avoiding valve-closing, impact force is excessive and produce vibrating noise; Optimize angle and the lift range value of valve opening breeze way and valve-closing breeze way, improve the fullness coefficient of cam profile two waist molded line, correspondingly improve charging efficiency;
(2) reduce the maximum lift of camshaft, the stress of valve spring reduces; By optimizing lift profile, reduce speed and the acceleration of valve, fatigue strength when reducing valve-spring surge and improve spring high speed; By the nose radius strengthened, reduce the contact stress that cam and valve are held out; Changed by above optimization, common working life of improving whole distribution device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the molded lines of exhaust cam.
Fig. 4 is the valve timing diagram of exhaust cam.
Embodiment
Below by embodiment also by reference to the accompanying drawings, the utility model is described in further detail:
Petrol engine distribution device exhaust cam shaft shown in composition graphs 1-Fig. 2, its main body is camshaft body 1, and the axle journal of camshaft body 1 is provided with oilhole 2.Preferably, the oilhole 2 on axle journal is arranged in pairs, and two oilhole 2 deads in line on same axle journal being communicated with, the external end head chamfering of each oilhole 2.
As shown in Figure 3, cam profile is surrounded by camshaft basic circle and cam peach, is made up of valve opening section 3, valve opening breeze way 4, closing flank 5 and valve-closing breeze way 6.The maximum lift h of cam is 8.4mm, minimum nose radius is 3.1613mm, the cam angle interval of valve opening section 3 correspondence is 0 ° ~ 56 °, corresponding lift is 8.4mm ~ 0.3490mm, the cam angle interval of valve opening breeze way 4 correspondence is 56 ° ~ 78.5 °, corresponding lift is 0.3490mm ~ 0mm, the cam angle interval of closing flank 5 correspondence is 0 ° ~ 60 °, corresponding lift is 8.4mm ~ 0.3543mm, the cam angle interval of valve-closing breeze way 6 correspondence is 60 ° ~ 81.5 °, and corresponding lift is 0.3543mm ~ 0mm.
As shown in Figure 4, the port timing exhaust advance angle α 1 of camshaft is 49 °, and port timing exhaust delay angles alpha 2 is 25 °.
Cam is in rotary course, and the actual measured value between angle of swing and lift is as follows:
Cam lift table (measuring with plane gauge head)
。
Claims (3)
1. a petrol engine distribution device exhaust cam shaft, comprise camshaft body (1), the axle journal of described camshaft body (1) is provided with oilhole (2), described cam profile is surrounded by camshaft basic circle and cam peach, comprise valve opening section (3), valve opening breeze way (4), closing flank (5) and valve-closing breeze way (6), it is characterized in that: the maximum lift h of described cam is 8.4mm, minimum nose radius is 3.1613mm, the cam angle interval of described valve opening section (3) correspondence is 0 ° ~ 56 °, corresponding lift is 8.4mm ~ 0.3490mm, the cam angle interval that valve opening breeze way (4) is corresponding is 56 ° ~ 78.5 °, corresponding lift is 0.3490mm ~ 0mm, the cam angle interval that closing flank (5) is corresponding is 0 ° ~ 60 °, corresponding lift is 8.4mm ~ 0.3543mm, the cam angle interval that valve-closing breeze way (6) is corresponding is 60 ° ~ 81.5 °, corresponding lift is 0.3543mm ~ 0mm.
2. according to petrol engine distribution device exhaust cam shaft according to claim 1, it is characterized in that: the port timing exhaust advance angle α 1 of described camshaft is 49 °, port timing exhaust delay angles alpha 2 is 25 °.
3. according to the petrol engine distribution device exhaust cam shaft described in claim 1 or 2, it is characterized in that: the oilhole (2) on described axle journal is arranged in pairs, and two oilholes (2) dead in line on same axle journal being communicated with, the external end head chamfering of each oilhole (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520140784.8U CN204511548U (en) | 2015-03-12 | 2015-03-12 | Petrol engine distribution device exhaust cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520140784.8U CN204511548U (en) | 2015-03-12 | 2015-03-12 | Petrol engine distribution device exhaust cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204511548U true CN204511548U (en) | 2015-07-29 |
Family
ID=53709538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520140784.8U Expired - Fee Related CN204511548U (en) | 2015-03-12 | 2015-03-12 | Petrol engine distribution device exhaust cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204511548U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523061A (en) * | 2015-09-09 | 2017-03-22 | 重庆凯驰汽车部件制造有限公司 | Camshaft of valve timing mechanism of gasoline engine |
-
2015
- 2015-03-12 CN CN201520140784.8U patent/CN204511548U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523061A (en) * | 2015-09-09 | 2017-03-22 | 重庆凯驰汽车部件制造有限公司 | Camshaft of valve timing mechanism of gasoline engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20200312 |