CN204511547U - Petrol engine intake and exhaust cam axle combines - Google Patents
Petrol engine intake and exhaust cam axle combines Download PDFInfo
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- CN204511547U CN204511547U CN201520139079.6U CN201520139079U CN204511547U CN 204511547 U CN204511547 U CN 204511547U CN 201520139079 U CN201520139079 U CN 201520139079U CN 204511547 U CN204511547 U CN 204511547U
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Abstract
The utility model discloses the combination of a kind of petrol engine intake and exhaust cam axle, comprise admission cam shaft (A) and exhaust cam shaft (B), enter, exhaust cam shaft (A, B) cam profile surrounds by camshaft basic circle and cam peach, adopt open side with close side asymmetrical enter, exhaust cam molded line structure, 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, 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.By optimizing the molded line of inlet and outlet camshaft, 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 inlet and outlet camshaft 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 admission cam shaft of longer service life.
Traditional petrol engine inlet and outlet camshaft, 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; Inlet and outlet camshaft 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 intake efficiency is not high, and impact during valve-closing greatly, and noise is high.
Model utility content
The utility model is intended to optimize the combination of petrol engine intake and exhaust cam axle, and the particularly molded line of inlet and outlet camshaft, 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 intake and exhaust cam axle combination, comprise admission cam shaft (A) and exhaust cam shaft (B), described enter, exhaust cam shaft (A, B) axle journal is provided with oilhole (9), and enter, exhaust cam shaft (A, B) cam profile surrounds by camshaft basic circle and cam peach, described intake cam molded line comprises intake valve and opens section (1), intake valve opens breeze way (2), intake valve closes section (3) and intake valve closes breeze way (4), described exhaust cam molded line comprises exhaust valve and opens section (5), exhaust valve opens breeze way (6), exhaust valve closes section (7) and exhaust valve closedown breeze way (8) is characterized in that:
The maximum lift h1 of described intake cam is 9mm, minimum nose radius is 3.6717mm, the cam angle interval that described intake valve opens section (1) corresponding is 0 ° ~ 57.5 °, corresponding lift is 9mm ~ 0.3832mm, the cam angle interval that intake valve opens breeze way (2) corresponding is 57.5 ° ~ 82 °, corresponding lift is 0.3832mm ~ 0mm, the cam angle interval that intake valve closes section (3) corresponding is 0 ° ~ 60 °, corresponding lift is 9mm ~ 0.3544mm, the cam angle interval that intake valve closes breeze way (4) corresponding is 60 ° ~ 84 °, corresponding lift is 0.3544mm ~ 0mm,
The maximum lift h2 of described exhaust cam is 8.4mm, minimum nose radius is 3.1613mm, the cam angle interval that described exhaust valve opens section (5) corresponding is 0 ° ~ 56 °, corresponding lift is 8.4mm ~ 0.3490mm, the cam angle interval that exhaust valve opens breeze way (6) corresponding is 56 ° ~ 78.5 °, corresponding lift is 0.3490mm ~ 0mm, the cam angle interval that exhaust valve closes section (7) corresponding is 0 ° ~ 60 °, corresponding lift is 8.4mm ~ 0.3543mm, the cam angle interval that exhaust valve closes breeze way (8) corresponding is 60 ° ~ 81.5 °, corresponding lift is 0.3543mm ~ 0mm.
Oilhole (9) on described inlet and outlet camshaft (A, B) axle journal is arranged in pairs, and two oilholes (9) dead in line on same axle journal being communicated with, the external end head chamfering of each oilhole (9), be convenient to manufacturing, and ensure the normal work of inlet and outlet camshaft.
The utility model adopts open side and closes side asymmetrical inlet and outlet cam profile structure, 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 inlet and outlet camshaft 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 charging efficiency, air inlet better effects if, 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 the structural representation of admission cam shaft.
Fig. 2 is the C-C sectional view of Fig. 1.
Fig. 3 is the molded lines of intake cam.
Fig. 4 is the structural representation of exhaust cam shaft.
Fig. 5 is the D-D sectional view of Fig. 4.
Fig. 6 is the molded lines of exhaust cam.
Embodiment
Below by embodiment also by reference to the accompanying drawings, the utility model is described in further detail:
Shown in composition graphs 1-Fig. 2, the main body of petrol engine air admission camshaft is camshaft body, and the axle journal of camshaft body is provided with oilhole 9.Preferably, the oilhole C on axle journal is arranged in pairs, and two oilhole C deads in line on same axle journal being communicated with, the external end head chamfering of each oilhole 2.
As shown in Figure 3, intake cam molded line is surrounded by camshaft basic circle and cam peach, and intake cam molded line comprises intake valve and opens section 1, intake valve unlatching breeze way 2, intake valve closedown section 3 and intake valve closedown breeze way 4.The maximum lift h1 of intake cam is 9mm, minimum nose radius is 3.6717mm, the cam angle interval that intake valve opens section 1 correspondence is 0 ° ~ 57.5 °, corresponding lift is 9mm ~ 0.3832mm, the cam angle interval that intake valve opens breeze way 2 correspondence is 57.5 ° ~ 82 °, corresponding lift is 0.3832mm ~ 0mm, the cam angle interval that intake valve closes section 3 correspondence is 0 ° ~ 60 °, corresponding lift is 9mm ~ 0.3544mm, the cam angle interval that intake valve closes breeze way 4 correspondence is 60 ° ~ 84 °, corresponding lift is 0.3544mm ~ 0mm.
Intake cam is in rotary course, and the actual measured value between angle of swing and lift is as follows:
Shown in composition graphs 4-Fig. 5, the main body of petrol engine exhaust cam shaft is camshaft body, and the axle journal of camshaft body is provided with oilhole 9.Preferably, the oilhole C on axle journal is arranged in pairs, and two oilhole C deads in line on same axle journal being communicated with, the external end head chamfering of each oilhole 2.
As shown in Figure 6, exhaust cam molded line is surrounded by camshaft basic circle and cam peach, and exhaust cam molded line comprises exhaust valve and opens section 5, exhaust valve unlatching breeze way 6, exhaust valve closedown section 7 and exhaust valve closedown breeze way 8.The maximum lift h2 of exhaust cam is 8.4mm, minimum nose radius is 3.1613mm, the cam angle interval that exhaust valve opens section 5 correspondence is 0 ° ~ 56 °, corresponding lift is 8.4mm ~ 0.3490mm, the cam angle interval that exhaust valve opens breeze way 6 correspondence is 56 ° ~ 78.5 °, corresponding lift is 0.3490mm ~ 0mm, the cam angle interval that exhaust valve closes section 7 correspondence is 0 ° ~ 60 °, corresponding lift is 8.4mm ~ 0.3543mm, the cam angle interval that exhaust valve closes breeze way 8 correspondence is 60 ° ~ 81.5 °, corresponding lift is 0.3543mm ~ 0mm.
Exhaust cam is in rotary course, and the actual measured value between angle of swing and lift is as follows:
。
Claims (2)
1. a petrol engine intake and exhaust cam axle combination, comprise admission cam shaft (A) and exhaust cam shaft (B), described enter, exhaust cam shaft (A, B) axle journal is provided with oilhole (9), and enter, exhaust cam shaft (A, B) cam profile surrounds by camshaft basic circle and cam peach, described intake cam molded line comprises intake valve and opens section (1), intake valve opens breeze way (2), intake valve closes section (3) and intake valve closes breeze way (4), described exhaust cam molded line comprises exhaust valve and opens section (5), exhaust valve opens breeze way (6), exhaust valve closes section (7) and exhaust valve closes breeze way (8), it is characterized in that:
The maximum lift h1 of described intake cam is 9mm, minimum nose radius is 3.6717mm, the cam angle interval that described intake valve opens section (1) corresponding is 0 ° ~ 57.5 °, corresponding lift is 9mm ~ 0.3832mm, the cam angle interval that intake valve opens breeze way (2) corresponding is 57.5 ° ~ 82 °, corresponding lift is 0.3832mm ~ 0mm, the cam angle interval that intake valve closes section (3) corresponding is 0 ° ~ 60 °, corresponding lift is 9mm ~ 0.3544mm, the cam angle interval that intake valve closes breeze way (4) corresponding is 60 ° ~ 84 °, corresponding lift is 0.3544mm ~ 0mm,
The maximum lift h2 of described exhaust cam is 8.4mm, minimum nose radius is 3.1613mm, the cam angle interval that described exhaust valve opens section (5) corresponding is 0 ° ~ 56 °, corresponding lift is 8.4mm ~ 0.3490mm, the cam angle interval that exhaust valve opens breeze way (6) corresponding is 56 ° ~ 78.5 °, corresponding lift is 0.3490mm ~ 0mm, the cam angle interval that exhaust valve closes section (7) corresponding is 0 ° ~ 60 °, corresponding lift is 8.4mm ~ 0.3543mm, the cam angle interval that exhaust valve closes breeze way (8) corresponding is 60 ° ~ 81.5 °, corresponding lift is 0.3543mm ~ 0mm.
2. according to petrol engine intake and exhaust cam axle combination according to claim 1, it is characterized in that: the oilhole (9) on described inlet and outlet camshaft (A, B) axle journal is arranged in pairs, and two oilholes (9) dead in line on same axle journal being communicated with, the external end head chamfering of each oilhole (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520139079.6U CN204511547U (en) | 2015-03-12 | 2015-03-12 | Petrol engine intake and exhaust cam axle combines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520139079.6U CN204511547U (en) | 2015-03-12 | 2015-03-12 | Petrol engine intake and exhaust cam axle combines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204511547U true CN204511547U (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520139079.6U Expired - Fee Related CN204511547U (en) | 2015-03-12 | 2015-03-12 | Petrol engine intake and exhaust cam axle combines |
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| Country | Link |
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| CN (1) | CN204511547U (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 CN201520139079.6U patent/CN204511547U/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 |
Granted publication date: 20150729 Termination date: 20200312 |
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| CF01 | Termination of patent right due to non-payment of annual fee |