CN202756036U - Combustion engine and cam shaft thereof - Google Patents
Combustion engine and cam shaft thereof Download PDFInfo
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- CN202756036U CN202756036U CN 201220388820 CN201220388820U CN202756036U CN 202756036 U CN202756036 U CN 202756036U CN 201220388820 CN201220388820 CN 201220388820 CN 201220388820 U CN201220388820 U CN 201220388820U CN 202756036 U CN202756036 U CN 202756036U
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- cam
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Abstract
The utility model discloses a cam shaft which is used for a combustion engine and comprises a support shaft, an air inlet cam, an exhaust cam and a brake cam, wherein the air inlet cam, the exhaust cam and the brake cam are sleeved and fixed on the support shaft. A working section of the exhaust cam is of 120.5 degrees, a transition section is of 30.5 degrees, base circle radius is 30+-0.05mm, and outline full height is 38.56+-0.04mm. The exhaust cam of the cam shaft is designed specific to structures of combustion engines of some new models, and design of the exhaust cam ensures the largest opening degree of an exhausting valve so as to ensure thorough exhausting. The design of the base circle radius ensures enough rigidity of the exhausting cam, the design of an angle of the transition section can reduce noises of the combustion engine. The utility model further discloses the combustion engine provided with the cam shaft.
Description
Technical field
The utility model relates to machinery manufacturing technology field, relates in particular to a kind of camshaft.The utility model also relates to a kind of internal-combustion engine with above-mentioned camshaft.
Background technique
In the structural design of internal-combustion engine, camshaft is the part for the opening and closing of control intake valve, exhaust valve.Camshaft comprises back shaft and sheathed and be fixed on intake cam, exhaust cam and brake cam on the described back shaft, wherein intake cam, exhaust cam and brake cam are the major parts of the switching campaign of control intake valve, exhaust valve, so the service behaviour of the appropriate design combustion motor of the profile of cam has certain influence.The parameter that determines cam profile mainly contains four, i.e. the profile overall height of the active section of cam, changeover portion, Base radius and cam.
In the prior art, there are some defectives in the cam of some internal-combustion engines, is not suitable for the structure of the internal-combustion engine of some new models, thereby causes the emission performance of internal-combustion engine relatively poor, and noise is large.
In sum, how to provide a kind of camshaft, thereby the emission performance that makes it effectively solve internal-combustion engine is relatively poor, and the large problem of noise, be present those skilled in the art's urgent problem.
The model utility content
In view of this, first purpose of the present utility model is to provide a kind of camshaft, it is relatively poor that this cam structural design of shaft can solve the emission performance of internal-combustion engine effectively, and the large problem of noise, and second purpose of the present utility model provides a kind of internal-combustion engine that comprises above-mentioned camshaft.
In order to reach above-mentioned first purpose, the utility model provides a kind of camshaft, being used for internal-combustion engine comprises: back shaft and sheathed and be fixed on intake cam, exhaust cam and brake cam on the described back shaft, the active section of described exhaust cam is 120.5 °, changeover portion is 30.5 °, Base radius is 30 ± 0.05mm, and the profile overall height is 38.56 ± 0.04mm.
Preferably, in the above-mentioned camshaft, the active section of the intake cam of described camshaft is 105.8 °, and changeover portion is 23.7 °, and Base radius is 30 ± 0.05mm, and the profile overall height is 42.37 ± 0.04mm.
Preferably, in the above-mentioned camshaft, the active section of the brake cam of described camshaft is 187.5 °, and Base radius is 30 ± 0.05mm, and the profile overall height is 33.16 ± 0.04mm.
Preferably, in the above-mentioned camshaft, the thickness of described exhaust cam and described intake cam is 23 ± 0.2mm, and the radius of the knuckle of described exhaust cam and described intake cam is 5mm, 106.2 ° of the center line angles of described intake cam and exhaust cam.
Preferably, in the above-mentioned camshaft, the diameter of described back shaft is 40mm.
Preferably, in the above-mentioned camshaft, being 229.1 ° along the angle on the sense of rotation of intake cam between the center line of described intake cam and the keyway center line, is 122.9 ° along the angle on the sense of rotation of exhaust cam between the center line of described exhaust cam and the keyway center line.
Preferably, in the above-mentioned camshaft, the air inlet retardation angle of described intake cam is 29.2 °, and intake advance angle is 11 °, and the air inlet delivery angle is 220.1 °;
The exhaust lag angle of described exhaust cam is 11.3 °, and exhaust advance angle is 49.7 °, and the exhaust delivery angle is 240.9 °.
Preferably, in the above-mentioned camshaft, the maximum lift of described intake cam is 12.3695mm, and the maximum lift of described exhaust cam is 8.5609mm, and the maximum lift of described brake cam is 3.1616mm.
A kind of internal-combustion engine, comprise above-mentioned in each described camshaft.
Preferably, in the above-mentioned internal-combustion engine, the angle that is separated by of the center line of the center line and the 5th, three, six, two of the intake cam of the first cylinder of described internal-combustion engine, the air inlet of four cylinders is respectively 60 °, 120 °, 180 °, 240 °, 300 °;
The angle that is separated by of the center line of the exhaust cam of the center line of the exhaust cam of the first cylinder and the 5th, three, six, two, four cylinders is respectively 60 °, 120 °, 180 °, 240 °, 300 °;
The angle that is separated by of the center line of the brake cam of the center line of the brake cam of the first cylinder and the 5th, three, six, two, four cylinders is respectively 60 °, 120 °, 180 °, 240 °, 300 °.
The camshaft that the utility model provides, comprise: back shaft and sheathed and be fixed on intake cam, exhaust cam and brake cam on the back shaft, wherein, the active section of exhaust cam is 120.5 °, changeover portion is 30.5 °, Base radius is 30 ± 0.05mm, and the profile overall height is 38.56 ± 0.04mm.
Camshaft provided by the utility model, its exhaust cam designs for the structure of the internal-combustion engine of some new models, the design of exhaust cam has guaranteed the maximum opening of exhaust valve, thereby guaranteed the thorough of exhaust, the design of its Base radius has guaranteed that this exhaust cam has enough rigidity, and the design of the angle of its changeover portion can reduce the noise of internal-combustion engine.
In order to reach above-mentioned second purpose, the utility model also provides a kind of internal-combustion engine, and this internal-combustion engine comprises above-mentioned any camshaft.Because above-mentioned camshaft has above-mentioned technique effect, the internal-combustion engine with this camshaft also should have corresponding technique effect.
In sum, it is relatively poor that camshaft provided by the utility model can solve the emission performance of internal-combustion engine effectively, and the large problem of noise.
Description of drawings
In order to be illustrated more clearly in the technological scheme in the utility model, employed accompanying drawing was done simple the introduction during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the exhaust cam of the first cylinder of providing among the utility model embodiment is provided Fig. 1;
The structural representation of the intake cam of the first cylinder of providing among the utility model embodiment is provided Fig. 2;
The structural representation of the brake cam of the first cylinder of providing among the utility model embodiment is provided Fig. 3;
The structural representation of the camshaft that provides among the utility model embodiment is provided Fig. 4;
The intake cam that provides among the utility model embodiment and the lift table of exhaust cam are provided Fig. 5;
The port timing schematic representation of Fig. 6 for providing among the utility model embodiment.
Mark is as follows in the accompanying drawing:
1-brake cam, 2-exhaust cam, 3-intake cam.
Embodiment
In order further to understand the utility model, below in conjunction with embodiment the utility model preferred implementation is described, but should be appreciated that these describe just in order to further specify feature and advantage of the present utility model, rather than to the restriction of the utility model claim.
First purpose of the present utility model is to provide a kind of camshaft, it is relatively poor that this cam structural design of shaft can solve the emission performance of internal-combustion engine effectively, and the large problem of noise, second purpose of the present utility model provides a kind of internal-combustion engine that comprises above-mentioned camshaft.
Below in conjunction with the accompanying drawing among the utility model embodiment, the scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making all other embodiments that obtain under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the camshaft that provides among the utility model embodiment comprises back shaft and sheathed and be fixed on intake cam, exhaust cam and brake cam on the described back shaft, wherein the active section of exhaust cam is that the corresponding angle of BCD is that 120.5 ° of changeover portions are that the corresponding angle of AB and DE is 30.5 °, the Base radius i.e. radius of round AEF is 30 ± 0.05mm, and the profile overall height is that the length of GC is 38.56 ± 0.04mm.
The camshaft that provides among the utility model embodiment, its exhaust cam designs for the structure of the internal-combustion engine of some new models, the design of exhaust cam has guaranteed the maximum opening of exhaust valve, thereby guaranteed the thorough of exhaust, its Base radius i.e. design of the radius of round AEF has guaranteed that this exhaust cam has enough rigidity, and its changeover portion is the noise that the design of AB and the corresponding angle of DE can reduce internal-combustion engine.
As shown in Figure 2, in order further to optimize technique scheme, in the above-mentioned camshaft, the active section of the intake cam of camshaft is B
1C
1D
1Corresponding angle is 105.8 °, and changeover portion is A
1B
1And D
1E
1Corresponding angle is 23.7 °, and Base radius i.e. round A
1E
1F
1Radius be 30 ± 0.05mm, the profile overall height is G
1C
1Length be 42.37 ± 0.04mm.Wherein the design of intake cam has guaranteed the maximum opening of intake valve, thereby has guaranteed to have enough fresh airs to enter cylinder, and its Base radius is namely justified A equally
1E
1F
1The design of radius guaranteed that this intake cam has enough rigidity, its changeover portion is A
1B
1And D
1E
1The design of corresponding angle can reduce the noise of internal-combustion engine.
As shown in Figure 3, in order further to optimize technique scheme, in the above-mentioned camshaft, the active section of the brake cam of camshaft is A
2B
2C
2Corresponding angle is 187.5 °, and Base radius is 30 ± 0.05mm, and the profile overall height is 33.16 ± 0.04mm.Wherein the active section of brake cam is A
2B
2C
2The design of corresponding angle and profile overall height has guaranteed the normal operation of this internal-combustion engine, and the design of its Base radius has guaranteed that this intake cam has enough rigidity equally.
In order further to optimize technique scheme, in the above-mentioned camshaft, in order to strengthen the intensity of exhaust cam and intake cam, the thickness of exhaust cam and intake cam all can be set to 23 ± 0.2mm, radius with the knuckle of exhaust cam and intake cam can be set to 5mm simultaneously, more smooth and easy for the cooperation of the exhaust cam that makes cylinder body and intake cam in addition, can be with 106.2 ° of the center line angles of intake cam and exhaust cam.
Wherein, in the above-mentioned camshaft, in order to strengthen the intensity of back shaft, diameter that can back shaft is set to 40mm.
Wherein, for so that the stressed effect of exhaust cam and intake cam is better, be set to 229.1 ° along the angle on the sense of rotation of intake cam between center line that can intake cam and the keyway center line, be set to 122.9 ° along the angle on the sense of rotation of exhaust cam between the center line of exhaust cam and the keyway center line.As shown in Figure 1, if take the center line GC of exhaust cam as 0 ° of reference line, be 122.9 ° along the phase angle between keyway center line OF on the sense of rotation of exhaust cam and the center line GC then.As shown in Figure 2, if with the center line G of intake cam
1C
1Be 0 ° of reference line, then along keyway center line O on the sense of rotation of intake cam
1F
1With center line G
1C
1Between the phase angle be 229.1 °.In addition, as shown in Figure 3, with the O in the brake cam
2D
2Be 0 ° of reference line, then along keyway center line O on the sense of rotation of brake cam
2F
2With O
2D
2Between the phase angle be 0.5 °.
In camshaft, begin to be opened to the corresponding crank angle of top dead center from intake valve and be called intake advance angle, be that the corresponding crank angle of keyway center line is the air inlet retardation angle from IC Intake Valve Closes to top dead center, be the air inlet delivery angle from IO Intake Valve Opens to corresponding crank angle between the IC Intake Valve Closes, be that corresponding crank angle is exhaust advance angle between the keyway center line from exhauxt valve opens to top dead center, be that corresponding crank angle is the exhaust lag angle between the keyway center line from exhaust valve closing to top dead center, exhauxt valve opens to corresponding crank angle between the exhaust valve closing is the exhaust delivery angle.As shown in Figure 6, in above-mentioned camshaft, in order to guarantee that live gas or inflammable mixture can enter cylinder smoothly, fully and exhaust is more thorough, can be with the air inlet retardation angle θ of intake cam
5Be set to 29.2 °, intake advance angle θ
1Be set to 11 °, air inlet delivery angle θ
3Be set to 220.1 °; Exhaust lag angle θ with exhaust cam
2Be set to 11.3 °, exhaust advance angle θ
4Be set to 49.7 °, exhaust delivery angle θ
6Be set to 240.9 °.Wherein the line in the center of circle of top dead center and back shaft is 0 ° of line, i.e. α=0 °, and the line in the center of circle of lower dead center and back shaft is 180 ° of lines, i.e. β=180 °.By changing the exhaust valve overlapping angle (the exhaust valve overlapping angle refers to the crank angle that the inlet and outlet door is opened simultaneously in internal combustion engine working process) of this internal-combustion engine, increase the amount of fresh air that enters cylinder like this, guarantee that air inlet is abundant, exhaust is thorough.Can improve like this performance of internal-combustion engine, improve power, reduce oil consumption.Control single exhaust valve by brake cam and open in advance, discharge compression energy.
In addition, for the distance of time of guaranteeing intake valve and exhauxt valve opens and its operation, the maximum lift that the maximum lift that the maximum lift of the intake cam on can this camshaft is set to 12.3695mm, exhaust cam is set to 8.5609mm and brake cam is set to 3.1616mm.
Wherein, when stating in the use the camshaft among the embodiment, the lift of exhaust cam and intake cam along with the variation of the rotation angle of back shaft as shown in Figure 5.
Based on the camshaft that provides in above-described embodiment, the utility model also provides a kind of internal-combustion engine, and this internal-combustion engine comprises above-mentioned any one camshaft.Because this internal-combustion engine has adopted the camshaft in above-described embodiment, so the beneficial effect of this internal-combustion engine please refer to above-described embodiment.
As shown in Figure 4, Fig. 4 is brake cam 1, exhaust cam 2 and intake cam 3 the arranging on the back shaft on the six-cylinder engine of this model utility.Wherein for so that the performance of above-mentioned internal-combustion engine is more stable, the angle that is separated by of the center line of the air inlet of the center line and the 5th, three, six, two of the intake cam of the first cylinder of internal-combustion engine, four cylinders can be set to respectively 60 °, 120 °, 180 °, 240 °, 300 °; The angle that is separated by of the center line of the exhaust cam of the center line of the exhaust cam of the first cylinder and the 5th, three, six, two, four cylinders is set to respectively 60 °, 120 °, 180 °, 240 °, 300 °; The angle that is separated by of the center line of the brake cam of the center line of the brake cam of the first cylinder and the 5th, three, six, two, four cylinders is set to respectively 60 °, 120 °, 180 °, 240 °, 300 °.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the disclosed method of embodiment, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
To the above-mentioned explanation of the disclosed embodiments, related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. camshaft is used for internal-combustion engine, comprising: back shaft and sheathed and be fixed on intake cam, exhaust cam and brake cam on the described back shaft, it is characterized in that,
The active section of described exhaust cam is 120.5 °, and changeover portion is 30.5 °, and Base radius is 30 ± 0.05mm, and the profile overall height is 38.56 ± 0.04mm.
2. camshaft according to claim 1 is characterized in that, the active section of the intake cam of described camshaft is 105.8 °, and changeover portion is 23.7 °, and Base radius is 30 ± 0.05mm, and the profile overall height is 42.37 ± 0.04mm.
3. camshaft according to claim 2 is characterized in that, the active section of the brake cam of described camshaft is 187.5 °, and Base radius is 30 ± 0.05mm, and the profile overall height is 33.16 ± 0.04mm.
4. described camshaft according to claim 2, it is characterized in that, the thickness of described exhaust cam and described intake cam is 23 ± 0.2mm, and the radius of the knuckle of described exhaust cam and described intake cam is 5mm, 106.2 ° of the center line angles of described intake cam and exhaust cam.
5. camshaft according to claim 1 is characterized in that, the diameter of described back shaft is 40mm.
6. camshaft according to claim 3, it is characterized in that, being 229.1 ° along the angle on the sense of rotation of intake cam between the center line of described intake cam and the keyway center line, is 122.9 ° along the angle on the sense of rotation of exhaust cam between the center line of described exhaust cam and the keyway center line.
7. camshaft according to claim 6 is characterized in that, the air inlet retardation angle of described intake cam is 29.2 °, and intake advance angle is 11 °, and the air inlet delivery angle is 220.1 °;
The exhaust lag angle of described exhaust cam is 11.3 °, and exhaust advance angle is 49.7 °, and the exhaust delivery angle is 240.9 °.
8. described camshaft according to claim 3 is characterized in that the maximum lift of described intake cam is 12.3695mm, and the maximum lift of described exhaust cam is 8.5609mm, and the maximum lift of described brake cam is 3.1616mm.
9. an internal-combustion engine is characterized in that, comprises each described camshaft among the claim 1-8.
10. internal-combustion engine according to claim 9, it is characterized in that the angle that is separated by of the center line of the center line and the 5th, three, six, two of the intake cam of the first cylinder of described internal-combustion engine, the air inlet of four cylinders is respectively 60 °, 120 °, 180 °, 240 °, 300 °;
The angle that is separated by of the center line of the exhaust cam of the center line of the exhaust cam of the first cylinder and the 5th, three, six, two, four cylinders is respectively 60 °, 120 °, 180 °, 240 °, 300 °;
The angle that is separated by of the center line of the brake cam of the center line of the brake cam of the first cylinder and the 5th, three, six, two, four cylinders is respectively 60 °, 120 °, 180 °, 240 °, 300 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220388820 CN202756036U (en) | 2012-08-07 | 2012-08-07 | Combustion engine and cam shaft thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220388820 CN202756036U (en) | 2012-08-07 | 2012-08-07 | Combustion engine and cam shaft thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202756036U true CN202756036U (en) | 2013-02-27 |
Family
ID=47735223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220388820 Withdrawn - After Issue CN202756036U (en) | 2012-08-07 | 2012-08-07 | Combustion engine and cam shaft thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202756036U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573317A (en) * | 2012-08-07 | 2014-02-12 | 安徽华菱汽车有限公司 | Internal combustion engine and cam shaft thereof |
-
2012
- 2012-08-07 CN CN 201220388820 patent/CN202756036U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573317A (en) * | 2012-08-07 | 2014-02-12 | 安徽华菱汽车有限公司 | Internal combustion engine and cam shaft thereof |
| CN103573317B (en) * | 2012-08-07 | 2016-01-27 | 安徽华菱汽车有限公司 | Internal-combustion engine and camshaft thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130227 Effective date of abandoning: 20160127 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |