CN103573317A - Internal combustion engine and cam shaft thereof - Google Patents
Internal combustion engine and cam shaft thereof Download PDFInfo
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- CN103573317A CN103573317A CN201210278806.8A CN201210278806A CN103573317A CN 103573317 A CN103573317 A CN 103573317A CN 201210278806 A CN201210278806 A CN 201210278806A CN 103573317 A CN103573317 A CN 103573317A
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- cam
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- angle
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Abstract
The invention discloses a cam shaft used for an internal combustion engine. The cam shaft comprises a support shaft, and an air inlet cam, an exhaust cam and a brake cam which are sheathed and fixed on the support shaft, wherein the exhaust cam has a working section with the angle of 120.5 degrees, a transition section with the angle of 30.5 degrees, the base radius of 30+/-0.05mm and the whole outline height of 38.56+/-0.04mm. According to the cam shaft, the exhaust cam is designed aiming at the structures of internal combustion engines of new automobile models, and the maximum open degree of an exhaust valve is guaranteed by the design of the exhaust cam, so that thorough exhausting can be guaranteed; due to the design of the base radius, the exhaust cam is enabled to have enough rigidity; due to the design of the angle of the transition section, the noise of the internal combustion engine can be reduced. The invention also discloses the internal combustion engine provided with the cam shaft.
Description
Technical field
The present invention relates to machinery manufacturing technology field, relate in particular to a kind of camshaft.The invention still further relates to a kind of internal-combustion engine with above-mentioned camshaft.
Background technique
In the structural design of internal-combustion engine, camshaft is for controlling the part of the opening and closing of intake valve, exhaust valve.Camshaft comprises back shaft and sheathed and be fixed on intake cam, exhaust cam and the brake cam on described back shaft, wherein intake cam, exhaust cam and brake cam are the major parts of controlling the switching campaign of 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 defects in the cam of some internal-combustion engines, is not suitable for the structure of the internal-combustion engine of some new models, thereby cause the emission performance of internal-combustion engine 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 poor, and the large problem of noise, be current those skilled in the art's urgent problem.
Summary of the invention
In view of this, first object of the present invention is to provide a kind of camshaft, it is poor that the structural design of this camshaft can solve the emission performance of internal-combustion engine effectively, and the large problem of noise, and second object of the present invention is to provide a kind of internal-combustion engine that comprises above-mentioned camshaft.
In order to reach above-mentioned first object, the invention provides a kind of camshaft, comprise for internal-combustion engine: back shaft and sheathed and be fixed on intake cam, exhaust cam and the brake cam on 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 profile overall height is 38.56 ± 0.04mm.
Preferably, in 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 profile overall height is 42.37 ± 0.04mm.
Preferably, in above-mentioned camshaft, the active section of the brake cam of described camshaft is 187.5 °, and Base radius is 30 ± 0.05mm, and profile overall height is 33.16 ± 0.04mm.
Preferably, in 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 above-mentioned camshaft, the diameter of described back shaft is 40mm.
Preferably, in above-mentioned camshaft, between the center line of described intake cam and keyway center line, along the angle in the sense of rotation of intake cam, being 229.1 °, is 122.9 ° along the angle in the sense of rotation of exhaust cam between the center line of described exhaust cam and keyway center line.
Preferably, in above-mentioned camshaft, the air inlet retardation angle of described intake cam is 29.2 °, and intake advance angle is 11 °, and 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 exhaust delivery angle is 240.9 °.
Preferably, in 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.
, comprise the camshaft described in above-mentioned middle any one.
Preferably, in above-mentioned internal-combustion engine, the angle that is separated by of the center line of the center line of the intake cam of the first cylinder of described internal-combustion engine and the air inlet of 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 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 °.
Camshaft provided by the invention, comprising: back shaft and sheathed and be fixed on intake cam, exhaust cam and the brake cam on back shaft, wherein, the active section of exhaust cam is 120.5 °, changeover portion is 30.5 °, and Base radius is 30 ± 0.05mm, and profile overall height is 38.56 ± 0.04mm.
Camshaft provided by the present invention, 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 object, the present invention 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 poor that camshaft provided by the present invention can solve the emission performance of internal-combustion engine effectively, and the large problem of noise.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the present invention, below the accompanying drawing using during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the exhaust cam that Fig. 1 is the first cylinder of providing in the embodiment of the present invention;
The structural representation of the intake cam that Fig. 2 is the first cylinder of providing in the embodiment of the present invention;
The structural representation of the brake cam that Fig. 3 is the first cylinder of providing in the embodiment of the present invention;
The structural representation that Fig. 4 is the camshaft that provides in the embodiment of the present invention;
Fig. 5 is the intake cam that provides in the embodiment of the present invention and the lift table of exhaust cam;
The port timing schematic diagram of Fig. 6 for providing in the embodiment of the present invention.
In accompanying drawing, mark is as follows:
1-brake cam, 2-exhaust cam, 3-intake cam.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment for the present invention is described, but should be appreciated that these are described is in order to further illustrate the features and advantages of the present invention, rather than limiting to the claimed invention.
First object of the present invention is to provide a kind of camshaft, and it is poor that the structural design of this camshaft can solve the emission performance of internal-combustion engine effectively, and the large problem of noise, and second object of the present invention is to provide a kind of internal-combustion engine that comprises above-mentioned camshaft.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Embodiment based in the present invention, those of ordinary skills, not making all other embodiments that obtain under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the camshaft providing in the embodiment of the present invention comprises back shaft and sheathed and be fixed on intake cam, exhaust cam and the brake cam on 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 profile overall height is that the length of GC is 38.56 ± 0.04mm.
The camshaft providing in the embodiment of the present invention, 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 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, 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 justifies 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 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 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 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, the radius of the knuckle of exhaust cam and intake cam can be set to 5mm simultaneously, in addition in order to make the exhaust cam of cylinder body and the cooperation of intake cam more smooth and easy, can be by 106.2 ° of the center line angles of intake cam and exhaust cam.
Wherein, in above-mentioned camshaft, in order to strengthen the intensity of back shaft, diameter that can back shaft is set to 40mm.
Wherein, in order to make the stressed effect of exhaust cam and intake cam better, between center line that can intake cam and keyway center line, along the angle in the sense of rotation of intake cam, be set to 229.1 °, between the center line of exhaust cam and keyway center line, along the angle in the sense of rotation of exhaust cam, be set to 122.9 °.As shown in Figure 1, if take the center line GC of exhaust cam is 0 ° of reference line, along the phase angle between keyway center line OF in the sense of rotation of exhaust cam and center line GC, it is 122.9 °.As shown in Figure 2, if with the center line G of intake cam
1c
1be 0 ° of reference line, along keyway center line O in the sense of rotation of intake cam
1f
1with center line G
1c
1between phase angle be 229.1 °.In addition, as shown in Figure 3, with the O in brake cam
2d
2be 0 ° of reference line, along keyway center line O in the sense of rotation of brake cam
2f
2with O
2d
2between phase angle be 0.5 °.
In camshaft, from intake valve, start to be opened to the corresponding crank angle of top dead center and be called intake advance angle, from IC Intake Valve Closes to top dead center, be that the corresponding crank angle of keyway center line is air inlet retardation angle, from IO Intake Valve Opens to corresponding crank angle between IC Intake Valve Closes, it is air inlet delivery angle, from exhauxt valve opens to top dead center, be that between keyway center line, corresponding crank angle is exhaust advance angle, from exhaust valve closing to top dead center, be that between keyway center line, corresponding crank angle is exhaust lag angle, exhauxt valve opens to corresponding crank angle between exhaust valve closing is 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 by 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 °; By the exhaust lag angle θ of 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 change the exhaust valve overlapping angle (exhaust valve overlapping angle refers to the crank angle that inlet and outlet door is opened in internal combustion engine working process) of this internal-combustion engine simultaneously, increase the amount of fresh air that enters cylinder like this, guarantee that air inlet is abundant, exhaust is thorough.Can improve the performance of internal-combustion engine like this, improve power, reduce oil consumption.By brake cam, control single exhaust valve and open in advance, discharge compression energy.
In addition, in order to guarantee the time of intake valve and exhauxt valve opens and the distance of 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, while stating in the use the camshaft in 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.
Camshaft based on providing in above-described embodiment, the present invention 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.
Arranging on brake cam 1, exhaust cam 2 and the back shaft of intake cam 3 on six-cylinder engine that as shown in Figure 4, Fig. 4 is this invention.Wherein, in order to make the performance of above-mentioned internal-combustion engine more stable, the angle that is separated by of the center line of the air inlet of the center line of the intake cam of the first cylinder of internal-combustion engine and the 5th, three, six, two, four cylinders can be set to respectively to 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 °.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiments, between each embodiment identical similar part mutually referring to.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part partly illustrates referring to method.
Above-mentioned explanation to the disclosed embodiments, professional and technical personnel in the field can realize or use the present invention.To these embodiments' multiple modification, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention 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. a camshaft, for internal-combustion engine, comprising: back shaft and sheathed and be fixed on intake cam, exhaust cam and the brake cam on 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 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 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 profile overall height is 33.16 ± 0.04mm.
4. 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, between the center line of described intake cam and keyway center line, along the angle in the sense of rotation of intake cam, being 229.1 °, is 122.9 ° along the angle in the sense of rotation of exhaust cam between the center line of described exhaust cam and 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 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 exhaust delivery angle is 240.9 °.
8. 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 the camshaft described in any one in 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 of the intake cam of the first cylinder of described internal-combustion engine and the air inlet of 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 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 |
|---|---|---|---|
| CN201210278806.8A CN103573317B (en) | 2012-08-07 | 2012-08-07 | Internal-combustion engine and camshaft thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210278806.8A CN103573317B (en) | 2012-08-07 | 2012-08-07 | Internal-combustion engine and camshaft thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103573317A true CN103573317A (en) | 2014-02-12 |
| CN103573317B CN103573317B (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210278806.8A Active CN103573317B (en) | 2012-08-07 | 2012-08-07 | Internal-combustion engine and camshaft thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065529A (en) * | 2020-09-11 | 2020-12-11 | 潍柴动力股份有限公司 | Valve mechanism and engine |
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| CN2385088Y (en) * | 1999-07-23 | 2000-06-28 | 广西玉柴机器股份有限公司 | YC 6105QA diesel engine cam shaft line |
| CN2385087Y (en) * | 1999-07-23 | 2000-06-28 | 广西玉柴机器股份有限公司 | YC41100 diesel engine cam axial lead |
| CN201125758Y (en) * | 2007-12-18 | 2008-10-01 | 广西玉柴机器股份有限公司 | Cam axle structure with cylinder internal exhaust brake |
| CN101865001A (en) * | 2010-01-29 | 2010-10-20 | 东风朝阳柴油机有限责任公司 | Cam with symmetrical profile lines |
| CN202756036U (en) * | 2012-08-07 | 2013-02-27 | 安徽华菱汽车有限公司 | Combustion engine and cam shaft thereof |
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2012
- 2012-08-07 CN CN201210278806.8A patent/CN103573317B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2385088Y (en) * | 1999-07-23 | 2000-06-28 | 广西玉柴机器股份有限公司 | YC 6105QA diesel engine cam shaft line |
| CN2385087Y (en) * | 1999-07-23 | 2000-06-28 | 广西玉柴机器股份有限公司 | YC41100 diesel engine cam axial lead |
| CN201125758Y (en) * | 2007-12-18 | 2008-10-01 | 广西玉柴机器股份有限公司 | Cam axle structure with cylinder internal exhaust brake |
| CN101865001A (en) * | 2010-01-29 | 2010-10-20 | 东风朝阳柴油机有限责任公司 | Cam with symmetrical profile lines |
| CN202756036U (en) * | 2012-08-07 | 2013-02-27 | 安徽华菱汽车有限公司 | Combustion engine and cam shaft thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065529A (en) * | 2020-09-11 | 2020-12-11 | 潍柴动力股份有限公司 | Valve mechanism and engine |
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| Publication number | Publication date |
|---|---|
| CN103573317B (en) | 2016-01-27 |
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