CN205400836U - Engine inlet cam , engine and vehicle - Google Patents
Engine inlet cam , engine and vehicle Download PDFInfo
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- CN205400836U CN205400836U CN201620251098.2U CN201620251098U CN205400836U CN 205400836 U CN205400836 U CN 205400836U CN 201620251098 U CN201620251098 U CN 201620251098U CN 205400836 U CN205400836 U CN 205400836U
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- valve
- engine charge
- charge cam
- engine
- cornerite
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Abstract
The utility model relates to an engine spare part field provides an engine inlet cam, engine and vehicle, engine inlet cam includes the edge the valve section of opening, valve closure section and base circle section that engine inlet cam's circumference set gradually, the angle of the cornerite of the valve section of opening between 70.5 to 72.5, the angle of the cornerite of valve closure section is between 75.5 to 77.5. Engine inlet cam adopt asymmetric cam profile, and increased the cornerite of valve section of opening and valve closure section, effectively improve the charging efficiency of engine for engine air distribution mechanism can satisfy the user demand of high rotational speed engine, and the valve section of opening of big cornerite and valve closure section can also reduce the required high lift of the mutually synchronal engine inlet cam of air input, reduce valve timing mechanism's load.
Description
Technical field
This utility model relates to engine component field, particularly to a kind of engine charge cam, electromotor and vehicle.
Background technology
The valve actuating mechanism of electromotor can control the air inlet system and exhaust system of electromotor, and then affects burning and the moment of torsion output of electromotor, is related to the dynamic property of electromotor, economy and reliability.
The admission cam making electromotor has suitable contour line can improve the charging efficiency of cylinder, thus improving combustibility and the moment of torsion output of electromotor, and, more fresh charge amount is also beneficial to reduce the burning indoor temperature of electromotor, and the pinking reducing electromotor improves the compression ratio of cylinder simultaneously.
In tradition, the molded line of engine charge cam is symmetrical molded line, the molded line of engine charge cam is difficult to adjust, and causes that electromotor can not reach desirable charging efficiency, and easily occurs that in engine operation process valve actuating mechanism flies off the phenomenon of valve knock-on during with valve-closing.
Thus, it is desirable to have a kind of engine charge cam can overcome or at least alleviate the drawbacks described above of prior art.
Utility model content
In view of this, this utility model is directed to a kind of engine charge cam, with the stability that the charging efficiency and electromotor improving electromotor is run.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
A kind of engine charge cam, described engine charge cam includes the valve opening section, closing flank and the basic circle section that set gradually along the circumference of described engine charge cam, the angle of the cornerite of described valve opening section is between 70.5 ° to 72.5 °, and the angle of the cornerite of described closing flank is between 75.5 ° to 77.5 °.
Further, the base radius of described engine charge cam is between 15mm to 18mm, and the difference of the base radius of the largest interval turned round between axle center of the outline of described engine charge cam and described engine charge cam and described engine charge cam is between 5mm to 7mm.
Further, described engine charge cam also includes the unlatching breeze way being arranged between described valve opening section and described basic circle section and the closedown breeze way being arranged between described closing flank and described basic circle section.
Further, the angle of the cornerite of described unlatching breeze way is between 12 ° to 14 °, and the angle of the cornerite of described closedown breeze way is between 17 ° to 19 °.
Further, the difference of the base radius of the outline of described unlatching breeze way and the largest interval turned round between axle center of described engine charge cam and described engine charge cam is between 0.15mm to 0.45mm, and the difference of the base radius of the outline of described closedown breeze way and the largest interval turned round between axle center of described engine charge cam and described engine charge cam is between 0.2mm to 0.4mm.
Relative to prior art, engine charge cam described in the utility model has the advantage that
Engine charge cam described in the utility model adopts asymmetrical cam profile, realize quickly opening and slowly closing of engine valve, and increase the cornerite of valve opening section and closing flank, extend valve-closing time and valve-opening time, it is effectively improved the charging efficiency of electromotor, reduce flying off of engine valve actuating mechanism, engine valve actuating mechanism is made to disclosure satisfy that the user demand of rev-happy engine, simultaneously, the valve opening section of big cornerite can also reduce the lift of engine charge cam with closing flank when air inflow is identical, and then reduce the load of valve actuating mechanism, extend the service life of valve actuating mechanism, improve stability and the reliability of electromotor.
Another object of the present utility model is in that to propose a kind of electromotor, to improve stability and the reliability of electromotor.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
A kind of electromotor, described electromotor is provided with according to engine charge cam mentioned above.
Described electromotor is identical relative to prior art have the advantage that with above-mentioned engine charge cam, does not repeat them here.
A further object of the present utility model is in that to propose a kind of vehicle, to improve stability and the reliability of vehicle.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
A kind of vehicle, described vehicle is provided with according to electromotor mentioned above.
Described vehicle is identical relative to prior art have the advantage that with above-mentioned engine charge cam, does not repeat them here.
Other features and advantages of the utility model will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
The accompanying drawing constituting a part of the present utility model is further appreciated by of the present utility model for providing, and schematic description and description of the present utility model is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the schematic diagram of the engine charge cam described in a kind of embodiment of the present utility model.
Description of reference numerals:
1-basic circle section, 2-opens breeze way, 3-valve opening section, 4-closing flank, and 5-closes breeze way.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in this utility model and the feature in embodiment can be mutually combined.
Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
According to an aspect of the present utility model, a kind of engine charge cam is provided, referring to Fig. 1, described engine charge cam includes the valve opening section 3, closing flank 4 and the basic circle section 1 that set gradually along the circumference of described engine charge cam, wherein, the angle of the cornerite of valve opening section 3 is between 70.5 ° to 72.5 °, and the angle of the cornerite of closing flank 4 is between 75.5 ° to 77.5 °.
Above-mentioned engine charge cam adopts asymmetrical cam profile, realize quickly opening and slowly closing of engine valve, and increase valve opening section 3 and the cornerite of closing flank 4, extend valve-closing time and valve-opening time, and then reduce the acceleration of valve motion, reduce the phenomenon that engine valve actuating mechanism flies off, and it is effectively improved the charging efficiency of electromotor, improve the engine valve actuating mechanism stability when electromotor height turns and reliability, simultaneously, the valve opening section 3 of big cornerite can also reduce the lift of engine charge cam with closing flank 4 when air inflow is identical, valve spring decrement and valve spring force are little, reduce load and the abrasion of valve actuating mechanism, extend the service life of valve actuating mechanism, improve stability and the reliability of electromotor.
And, owing to the cornerite of closing flank 4 is bigger, make valve-closing process time long, the acceleration of valve-closing is little, and required valve spring force is little, is equally beneficial for reducing the stress loading between valve actuating mechanism parts, reduce driving resistance and the parts wear degree of valve actuating mechanism, when adopt identical valve spring, be conducive to weaken high engine speeds operating time valve actuating mechanism fly off tendency, make valve actuating mechanism meet the user demand of rev-happy engine.
Preferably, the base radius of described engine charge cam is between 15mm to 18mm, and the difference of the base radius of the largest interval turned round between axle center of the outline of described engine charge cam and described engine charge cam and described engine charge cam is between 5mm to 7mm.The valve opening section 3 of big cornerite and closing flank 4 can extend valve and be in the time of opening, and then the difference (reducing the lift of valve) of the largest interval between the outline of engine charge cam and the revolution axle center of described engine charge cam and the base radius of described engine charge cam can be reduced when air inflow is identical, reduce the load of the valve actuating mechanism of electromotor, extend the service life of valve actuating mechanism, improve stability and the reliability of electromotor.Wherein, in the shown embodiment, the base radius of this engine charge cam is 15.75mm, largest interval and the difference of the base radius of described engine charge cam between outline and the revolution axle center of described engine charge cam of its engine charge cam are 6.7mm, the lift of engine charge cam is less, reduces the abrasion between load and each parts of valve actuating mechanism.
Generally, it is reserved with certain valve clearance between the valve and drive mechanism of electromotor, to guarantee still to be able to ensure that under the hot environment when electromotor does work valve sealing, but, valve actuating mechanism is impacted when causing opening valve by this valve clearance, produces vibration.Therefore, preferably, described engine charge cam also includes the unlatching breeze way 2 being arranged between valve opening section 3 and basic circle section 1, realize basic circle section 1 and open seamlessly transitting of breeze way 2, make the velocity variations starting to open up less, successive elimination valve clearance, weakens the impact to valve actuating mechanism in the process eliminating valve clearance, is conducive to improving the reliability of valve actuating mechanism, improving the noise level of valve actuating mechanism.
In addition, when closing valve, the sudden change of valve motion speed is also easy to cause that the power of taking a seat is relatively big, produce valve knock-on when air valve drop, therefore, preferably, closedown breeze way 5 is set between closing flank 4 and basic circle section 1, and makes to close valve slowly in closing breeze way 5, reduce valve exit flow field, avoid occurring that when closing valve valve knock-on etc. closes phenomenon extremely, effectively reduce air valve drop noise, improve valve actuating mechanism serviceability in rev-happy engine.
Wherein, the cornerite opening breeze way 2 is preferably less than the cornerite closing breeze way 5, to realize the quick unlatching of valve, improves charging efficiency during low engine speeds, improves low engine speed performance.Further, bigger cornerite close acceleration when breeze way 5 also is able to reduce valve-closing so that the power of taking a seat during valve-closing is less, reduces valve spring force needed for valve-closing, and then reduces the abrasion of the parts such as valve actuating mechanism.
Preferably, open the angle of cornerite of breeze way 2 between 12 ° to 14 °, close the angle of cornerite of breeze way 5 between 17 ° to 19 °, open breeze way 2 and closedown breeze way 5 all continues bigger cornerite so that with when closing, there is enough buffer time at valve opening.User can select the suitable cornerite opening breeze way 2 according to actual needs and close the cornerite of breeze way 5, and wherein, in the shown embodiment, the cornerite opening breeze way 2 is 13 °, and the cornerite closing breeze way 5 is 18 °.
nullOpen the largest interval between the outline of the cam of breeze way 2 and closedown breeze way 5 and the revolution axle center of described engine charge cam relevant with the valve clearance of engine valve actuating mechanism with the difference of the base radius of described engine charge cam，The difference of its base radius opening breeze way 2 and the largest interval closed between the outline of breeze way 5 cam and the revolution axle center of described engine charge cam and described engine charge cam of valve actuating mechanism that valve clearance is bigger increases therewith，Preferably，Open the difference of base radius of the largest interval between the outline of breeze way 2 and the revolution axle center of described engine charge cam and described engine charge cam between 0.15mm to 0.45mm，Close the difference of base radius of the largest interval between the outline of breeze way 5 and the revolution axle center of described engine charge cam and described engine charge cam between 0.2mm to 0.4mm，Make valve less in the lift opening breeze way 2 and closedown breeze way 5，And then make the speed at this stage valve less，Making can successive elimination valve clearance when valve is opened，Can slowly take a seat when valve-closing，Valve is avoided to bounce.Wherein, in the shown embodiment, largest interval and the difference of the base radius of described engine charge cam between outline and the revolution axle center of described engine charge cam of unlatching breeze way 2 correspondence are 0.15mm, and the difference of the base radius closing the largest interval between the outline of breeze way 5 and the revolution axle center of described engine charge cam and described engine charge cam is 0.18mm.
The radius of curvature of the contour curve of engine charge cam can select suitable value according to actual needs so that admission cam can drive valve motion comparatively smoothly.Referring to Fig. 1, in the shown embodiment, the radius of curvature of the contour curve opening breeze way 2 is generally more than 300mm, but it is also possible that negative value occurs, the radius of curvature of valve opening section 3 is by rapid decrease with opening the position that breeze way 2 engages, change in the scope of 13.5mm to 15mm subsequently, the radius of curvature of closing flank 4 progressively increases to 29mm from 12.5mm, the radius of curvature closing breeze way 5 progressively increases to about 32mm from 29mm, to realize quickly opening and slowly closing of valve, and operating mode when arranging according to valve opening opening the radius of curvature of breeze way 2 and closedown breeze way 5 is configured realizing basic circle section 1 and valve opening section 3, seamlessly transitting between closing flank 4, reduce the impact to valve actuating mechanism.
Referring to Fig. 1, in the shown embodiment, engine charge cam is made up of basic circle section 1, unlatching breeze way 2, valve opening section 3, closing flank 4 and closedown breeze way 5, and basic circle section 1 radius is 15.75mm, wherein:
Open breeze way 2 from 95.5 ° of positions, continue cornerite 13 °, open breeze way 2 can successive elimination valve clearance, weaken the impact of valve actuating mechanism in eliminating gap process；
Valve opening section 3, from 108.5 ° of positions, continues cornerite 71.5 °, and closing flank is from 180 ° of positions, continue cornerite 76.5 °, wherein the cornerite of closing flank 4 is more than the cornerite of valve opening section 3, enables valve quickly to open and slowly closing, is conducive to improving charging efficiency；
Closing breeze way 5 from 256.5 °, continue cornerite 18 °, during this closedown breeze way 5, air valve drop is closed.
According to another aspect of the present utility model, it is provided that a kind of electromotor, described electromotor is provided with according to engine charge cam mentioned above.
Above-mentioned electromotor adopts the admission cam with asymmetrical cam profile, realize quickly opening and slowly closing of engine valve, extend valve and be in the opening time, it is effectively improved the charging efficiency of electromotor, enough fresh charges can reduce the temperature that engine combustion is indoor, reduce combustion knock phenomenon, improve stability and the reliability of electromotor, especially the stability of rev-happy engine and reliability, and be conducive to improving engine compression ratio, and then improve the moment of torsion output of electromotor.Flying off of few engine valve actuating mechanism.
According to another aspect of the present utility model, it is provided that a kind of vehicle, described vehicle is provided with according to electromotor mentioned above.This vehicle has similar advantage with above-mentioned electromotor, does not repeat them here.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (7)
1. an engine charge cam, described engine charge cam includes the valve opening section (3), closing flank (4) and the basic circle section (1) that set gradually along the circumference of described engine charge cam, it is characterized in that, the angle of the cornerite of described valve opening section (3) is between 70.5 ° to 72.5 °, and the angle of the cornerite of described closing flank (4) is between 75.5 ° to 77.5 °.
2. engine charge cam according to claim 1, it is characterized in that, the base radius of described engine charge cam is between 15mm to 18mm, and the difference of the base radius of the largest interval turned round between axle center of the outline of described engine charge cam and described engine charge cam and described engine charge cam is between 5mm to 7mm.
3. engine charge cam according to claim 1 and 2, it is characterized in that, described engine charge cam also includes the unlatching breeze way (2) being arranged between described valve opening section (3) and described basic circle section (1) and the closedown breeze way (5) being arranged between described closing flank (4) and described basic circle section (1).
4. engine charge cam according to claim 3, it is characterised in that the angle of the cornerite of described unlatching breeze way (2) is between 12 ° to 14 °, and the angle of the cornerite of described closedown breeze way (5) is between 17 ° to 19 °.
5. engine charge cam according to claim 4, it is characterized in that, the difference of the base radius of the outline of described unlatching breeze way (2) and the largest interval turned round between axle center of described engine charge cam and described engine charge cam is between 0.15mm to 0.45mm, and the difference of the base radius of the outline of described closedown breeze way (5) and the largest interval turned round between axle center of described engine charge cam and described engine charge cam is between 0.2mm to 0.4mm.
6. an electromotor, it is characterised in that described electromotor is provided with the engine charge cam according to any one in claim 1-5.
7. a vehicle, it is characterised in that described vehicle is provided with electromotor according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620251098.2U CN205400836U (en) | 2016-03-29 | 2016-03-29 | Engine inlet cam , engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620251098.2U CN205400836U (en) | 2016-03-29 | 2016-03-29 | Engine inlet cam , engine and vehicle |
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| Publication Number | Publication Date |
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| CN205400836U true CN205400836U (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620251098.2U Active CN205400836U (en) | 2016-03-29 | 2016-03-29 | Engine inlet cam , engine and vehicle |
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| CN (1) | CN205400836U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593982A (en) * | 2019-10-09 | 2019-12-20 | 重庆潍柴发动机有限公司 | Cam molded line, cam applying molded line and diesel engine applying cam |
| CN111021857A (en) * | 2018-10-09 | 2020-04-17 | 稳多企业股份有限公司 | Buffering hinge |
-
2016
- 2016-03-29 CN CN201620251098.2U patent/CN205400836U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021857A (en) * | 2018-10-09 | 2020-04-17 | 稳多企业股份有限公司 | Buffering hinge |
| CN110593982A (en) * | 2019-10-09 | 2019-12-20 | 重庆潍柴发动机有限公司 | Cam molded line, cam applying molded line and diesel engine applying cam |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |