CN203925636U - A kind of petrol engine cam - Google Patents
A kind of petrol engine cam Download PDFInfo
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- CN203925636U CN203925636U CN201420334697.1U CN201420334697U CN203925636U CN 203925636 U CN203925636 U CN 203925636U CN 201420334697 U CN201420334697 U CN 201420334697U CN 203925636 U CN203925636 U CN 203925636U
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Abstract
The purpose of this utility model is to provide a kind of petrol engine cam, and it can make engine valve movement rule more reasonable, can greatly improve the performance index such as engine power moment of torsion.Petrol engine cam of the present utility model comprises eight intake cams and eight exhaust cams, and key is that described intake cam open side is 71 ° to the angular interval between cam maximum lift, and corresponding lift is 0 to 5.18925mm; The angular interval that described cam maximum lift is closed between side to cam is 84 °, and corresponding lift is 5.18925mm to 0mm; Described exhaust cam open side is 65 ° to the angular interval between cam maximum lift, and corresponding lift is 0 to 5.05908mm; The angular interval that described cam maximum lift is closed between side to cam is 83 °, and corresponding lift is 5.05908mm to 0mm.
Description
Technical field
The utility model belongs to technical field of engines, relates to a kind of petrol engine cam.
Background technique
Distribution device is the important component part of motor, and it not only affects stability and the reliability of motor, and larger Important Relations the key property such as power character and Economy of motor.Engine valve actuating mechanism is by camshaft actuated, and the design of whole camshaft plays conclusive effect to the performance of distribution device, wherein important with Design of Cam Profiles again.Along with improving constantly of motor reinforcing degree, require gas distribution system to there is good ventilation quality on the one hand, require again on the other hand distribution device can stablize, work enduringly.These two conditions restrict mutually, therefore need the cam design to continue to optimize to meet the requirement of various performances and stability aspect.
Model utility content
The purpose of this utility model is to provide a kind of petrol engine cam, and it can make engine valve movement rule more reasonable, can greatly improve the performance index such as engine power moment of torsion.
Petrol engine cam of the present utility model comprises eight intake cams and eight exhaust cams, and key is that described intake cam open side is 71 ° to the angular interval between cam maximum lift, and corresponding lift is 0 to 5.18925mm; The angular interval that described cam maximum lift is closed between side to cam is 84 °, and corresponding lift is 5.18925mm to 0mm; All the other angular interval of one-period are that the intake valve of 0mm lift is closed maintenance section; In described eight intake cams, the first cylinder nose is 174.5 ° ± 0.25 ° with respect to the angle of benchmark D; The second cylinder nose is 84.5 ° ± 0.25 ° with respect to the angle of benchmark D; The 3rd cylinder nose is 264.5 ° ± 0.25 ° with respect to the angle of benchmark D; The 4th cylinder nose is 354.5 ° ± 0.25 ° with respect to the angle of benchmark D; Described benchmark D is the position of crank angle 270 Camshaft Key Seat median plane while spending.
The molded line of intake cam increase progressively angle and corresponding lift as following table (polar coordinate system):
Described exhaust cam open side is 65 ° to the angular interval between cam maximum lift, and corresponding lift is 0 to 5.05908mm; The angular interval that described cam maximum lift is closed between side to cam is 83 °, and corresponding lift is 5.05908mm to 0mm; All the other angular interval of one-period are that the exhaust valve of 0mm lift is closed maintenance section; In described eight exhaust cams, the first cylinder nose is 102.1 ° ± 0.25 ° with respect to the angle of benchmark D; The second cylinder nose is 12.1 ° ± 0.25 ° with respect to the angle of benchmark D; The 3rd cylinder nose is 192.1 ° ± 0.25 ° with respect to the angle of benchmark D; The 4th cylinder nose is 282.1 ° ± 0.25 ° with respect to the angle of benchmark D; Described benchmark D is the position of crank angle 270 Camshaft Key Seat median plane while spending.
The molded line of exhaust cam increase progressively angle and corresponding lift as following table (polar coordinate system):
Above-mentioned intake cam open side is 71 ° to angle between cam maximum lift, and now valve enters opening travel under intake cam drives, and reaches gradually maximum Lift; The angle that cam maximum lift is closed between side to cam is 84 °, and now valve enters shutoff stroke under actuated by cams, until finally close completely.Open section and add up and be referred to as the active section of intake cam with the section of closing, whole active section angle is 155 °.
Above-mentioned exhaust cam open side is 65 ° to angle between cam maximum lift, and now valve enters opening travel under actuated by cams, and reaches gradually maximum Lift; The angle that cam maximum lift is closed between side to cam is 83 °, and now valve enters shutoff stroke under actuated by cams, until finally close completely.Open section and add up and be referred to as the active section of exhaust cam with the section of closing, whole active section angle is 148 °.
The Base radius of above-mentioned intake cam and exhaust cam is 16mm, and basic circle tolerance of size is ± 0.05mm; Basic circle section profile tolerance is 0.04mm, and active section profile tolerance is 0.1mm, and cam width is 13mm.
Cam structure of the present utility model has good valve motion rule, can greatly improve engine performance and distribution device stability.
Brief description of the drawings
Fig. 1 is the profile diagram (in figure, arrow is cam sense of rotation) of intake cam of the present utility model.
Fig. 2 is the profile diagram (in figure, arrow is cam sense of rotation) of exhaust cam of the present utility model.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, embodiment of the present utility model is described in further detail as effect and the working principle etc. of the mutual alignment between the shape of related each member, structure, each several part and annexation, each several part.
Embodiment 1:
As shown in Figure 1, 2, the petrol engine cam of the present embodiment comprises eight intake cams and eight exhaust cams, i.e. four cylinder engine, corresponding two intake cams of every cylinder and two exhaust cams; Key is that described intake cam open side is 71 ° to the angular interval between cam maximum lift, and corresponding lift is 0 to 5.18925mm; The angular interval that described cam maximum lift is closed between side to cam is 84 °, and corresponding lift is 5.18925mm to 0mm; All the other angular interval of one-period are that the intake valve of 0mm lift is closed maintenance section; In described eight intake cams, the first cylinder nose is 174.5 ° ± 0.25 ° with respect to the angle of benchmark D; The second cylinder nose is 84.5 ° ± 0.25 ° with respect to the angle of benchmark D; The 3rd cylinder nose is 264.5 ° ± 0.25 ° with respect to the angle of benchmark D; The 4th cylinder nose is 354.5 ° ± 0.25 ° with respect to the angle of benchmark D; Described benchmark D is the position of crank angle 270 Camshaft Key Seat median plane while spending.
The molded line of intake cam increase progressively angle and corresponding lift as following table (polar coordinate system):
Described exhaust cam open side is 65 ° to the angular interval between cam maximum lift, and corresponding lift is 0 to 5.05908mm; The angular interval that described cam maximum lift is closed between side to cam is 83 °, and corresponding lift is 5.05908mm to 0mm; All the other angular interval of one-period are that the exhaust valve of 0mm lift is closed maintenance section; In described eight exhaust cams, the first cylinder nose is 102.1 ° ± 0.25 ° with respect to the angle of benchmark D; The second cylinder nose is 12.1 ° ± 0.25 ° with respect to the angle of benchmark D; The 3rd cylinder nose is 192.1 ° ± 0.25 ° with respect to the angle of benchmark D; The 4th cylinder nose is 282.1 ° ± 0.25 ° with respect to the angle of benchmark D; Described benchmark D is the position of crank angle 270 Camshaft Key Seat median plane while spending.
The molded line of exhaust cam increase progressively angle and corresponding lift as following table (polar coordinate system):
Above-mentioned intake cam open side is 71 ° to angle between cam maximum lift, and now valve enters opening travel under intake cam drives, and reaches gradually maximum Lift; The angle that cam maximum lift is closed between side to cam is 84 °, and now valve enters shutoff stroke under actuated by cams, until finally close completely.Open section and add up and be referred to as the active section of intake cam with the section of closing, whole active section angle is 155 °.
Above-mentioned exhaust cam open side is 65 ° to angle between cam maximum lift, and now valve enters opening travel under actuated by cams, and reaches gradually maximum Lift; The angle that cam maximum lift is closed between side to cam is 83 °, and now valve enters shutoff stroke under actuated by cams, until finally close completely.Open section and add up and be referred to as the active section of exhaust cam with the section of closing, whole active section angle is 148 °.
The Base radius of above-mentioned intake cam and exhaust cam is 16mm, and basic circle tolerance of size is ± 0.05mm; Basic circle section profile tolerance is 0.04mm, and active section profile tolerance is 0.1mm, and cam width is 13mm.
Claims (5)
1. a petrol engine cam, comprises eight intake cams and eight exhaust cams, it is characterized in that described intake cam open side is 71 ° to the angular interval between cam maximum lift, and corresponding lift is 0 to 5.18925mm; The angular interval that described cam maximum lift is closed between side to cam is 84 °, and corresponding lift is 5.18925mm to 0mm; All the other angular interval of one-period are that the intake valve of 0mm lift is closed maintenance section; In described eight intake cams, the first cylinder nose is 174.5 ° ± 0.25 ° with respect to the angle of benchmark D; The second cylinder nose is 84.5 ° ± 0.25 ° with respect to the angle of benchmark D; The 3rd cylinder nose is 264.5 ° ± 0.25 ° with respect to the angle of benchmark D; The 4th cylinder nose is 354.5 ° ± 0.25 ° with respect to the angle of benchmark D; Described benchmark D is the position of crank angle 270 Camshaft Key Seat median plane while spending.
2. petrol engine cam according to claim 1, it is characterized in that described intake cam molded line increase progressively angle and corresponding lift as the polar coordinate system of following table:
。
3. petrol engine cam according to claim 1, is characterized in that described exhaust cam open side is 65 ° to the angular interval between cam maximum lift, and corresponding lift is 0 to 5.05908mm; The angular interval that described cam maximum lift is closed between side to cam is 83 °, and corresponding lift is 5.05908mm to 0mm; All the other angular interval of one-period are that the exhaust valve of 0mm lift is closed maintenance section; In described eight exhaust cams, the first cylinder nose is 102.1 ° ± 0.25 ° with respect to the angle of benchmark D; The second cylinder nose is 12.1 ° ± 0.25 ° with respect to the angle of benchmark D; The 3rd cylinder nose is 192.1 ° ± 0.25 ° with respect to the angle of benchmark D; The 4th cylinder nose is 282.1 ° ± 0.25 ° with respect to the angle of benchmark D; Described benchmark D is the position of crank angle 270 Camshaft Key Seat median plane while spending.
4. petrol engine cam according to claim 3, it is characterized in that described exhaust cam molded line increase progressively angle and corresponding lift as the polar coordinate system of following table:
。
5. according to the petrol engine cam described in claim 1 or 2 or 3 or 4, it is characterized in that the Base radius of described intake cam and exhaust cam is 16mm, basic circle tolerance of size is ± 0.05mm; Basic circle section profile tolerance is 0.04mm, and active section profile tolerance is 0.1mm, and cam width is 13mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334697.1U CN203925636U (en) | 2014-06-20 | 2014-06-20 | A kind of petrol engine cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334697.1U CN203925636U (en) | 2014-06-20 | 2014-06-20 | A kind of petrol engine cam |
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| CN203925636U true CN203925636U (en) | 2014-11-05 |
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| CN201420334697.1U Active CN203925636U (en) | 2014-06-20 | 2014-06-20 | A kind of petrol engine cam |
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| CN (1) | CN203925636U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469378A (en) * | 2019-09-24 | 2019-11-19 | 深圳臻宇新能源动力科技有限公司 | Admission cam, engine and the vehicle of engine |
| CN114251148A (en) * | 2020-09-21 | 2022-03-29 | 深圳臻宇新能源动力科技有限公司 | Intake cam of engine, engine and vehicle |
| CN115263483A (en) * | 2022-07-01 | 2022-11-01 | 奇瑞汽车股份有限公司 | Cam, camshaft and engine |
-
2014
- 2014-06-20 CN CN201420334697.1U patent/CN203925636U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469378A (en) * | 2019-09-24 | 2019-11-19 | 深圳臻宇新能源动力科技有限公司 | Admission cam, engine and the vehicle of engine |
| CN114251148A (en) * | 2020-09-21 | 2022-03-29 | 深圳臻宇新能源动力科技有限公司 | Intake cam of engine, engine and vehicle |
| CN115263483A (en) * | 2022-07-01 | 2022-11-01 | 奇瑞汽车股份有限公司 | Cam, camshaft and engine |
| CN115263483B (en) * | 2022-07-01 | 2024-03-26 | 奇瑞汽车股份有限公司 | Cam, cam shaft and engine |
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