CN201391340Y - Fully-changeable cam molded line mechanism - Google Patents
Fully-changeable cam molded line mechanism Download PDFInfo
- Publication number
- CN201391340Y CN201391340Y CN200820217095U CN200820217095U CN201391340Y CN 201391340 Y CN201391340 Y CN 201391340Y CN 200820217095 U CN200820217095 U CN 200820217095U CN 200820217095 U CN200820217095 U CN 200820217095U CN 201391340 Y CN201391340 Y CN 201391340Y
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- Prior art keywords
- cam
- piston
- molded lines
- cavity
- optimal
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- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
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Abstract
The utility model discloses a fully-changeable cam molded line mechanism, which comprises a cam shaft and is characterized in that the cam shaft is provided with a cavity communicated with an oil duct, the cavity is internally provided with a piston with a positioning pin, and a cam which is at least provided with two molded lines are sleeved on the cam shaft and connected with the piston by the positioning pin. With the structure, one optimal cam molded line at each rotating speed of an engine, the optimal air valve opening time and air valve lift correspond to the rotating speed, so that the optimal performance is played at each rotation speed and one optimal cam molded line is matched with each rotating speed to play the optimal performance. The mechanism has simple structure, can improve the performance of the engine under the condition without changing other mechanisms and has good interchangeability.
Description
Technical field
The utility model relates to motor, specifically, relates to a kind of full variable cam molded lines mechanism.
Background technique:
Existing motor is owing to adopt cam in the camshaft structure of axle one, cam profile adopts single integrated sexual type line or dimorphism line to control all speed range interior valve lift and phase place, its shortcoming is the optimal engine performance in the time of can only bringing into play a certain rotating speed, but can not bring into play the optimum performance of the motor under other rotating speeds, and be to obtain engine power energy preferably under some rotating speed, make the Economy of complete machine descend to sacrifice Economy.Motor is different to the opening time of valve and the demand of valve lift under different rotating speeds, and this has tangible influence to engine performance.
The model utility content
Technical problem to be solved in the utility model is, at the deficiencies in the prior art, a kind of full variable cam molded lines mechanism is provided, to realize all having under each rotating speed corresponding with it optimal valve opening time and valve lift, that is to say that the cam profile that a best is all arranged under each rotating speed is corresponding with it, the optimum performance when bringing into play each rotating speed.
For solving the problems of the technologies described above, the technical solution of the utility model is, a kind of full variable cam molded lines mechanism, comprise camshaft, it is characterized in that: described camshaft is provided with the cavity that communicates with oil duct, be provided with the piston of band locating stud in the cavity, the cam that is provided with two above molded lines at least is sleeved on the camshaft, is connected with piston by locating stud.
A kind of full variable cam molded lines mechanism is provided with return spring between one end of described piston and the cavity.
A kind of full variable cam molded lines mechanism, described cam is provided with many group molded lines.
A kind of full variable cam molded lines mechanism, the length of described cavity hatch equals length of piston travel.
A kind of full variable cam molded lines mechanism, owing to adopt said structure, under each rotating speed of motor, all there is the cam profile an of the best corresponding with it, corresponding with it optimal valve opening time and valve lift are all arranged, optimum performance when bringing into play each rotating speed is for the cam profile of the best of each rotating speed coupling is brought into play its best performance.This mechanism structure is simple, can improve engine performance under the situation that does not change other mechanisms, and interchangeability is good.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail;
Fig. 1 is a kind of full variable cam molded lines mechanism structure schematic representation of the utility model;
Fig. 2 is that piston shown in Figure 1 connects schematic representation with cavity;
Fig. 3 is a cam structure schematic representation shown in Figure 1;
Fig. 4 is a piston structure schematic representation shown in Figure 1;
Fig. 5 is a cavity body structure schematic representation shown in Figure 1;
In Fig. 1～Fig. 5,1, camshaft; 2, piston; 3, cavity; 4, locating stud; 5, return spring; 6, cam; 7, oil duct.
Embodiment
As Fig. 1～shown in Figure 5, a kind of full variable cam molded lines mechanism comprises camshaft 1, described camshaft 1 is provided with the cavity 3 that communicates with oil duct 7, be provided with the piston 2 of band locating stud 4 in the cavity 3, the cam 6 that is provided with bar molded lines 8 is sleeved on the camshaft 1, is connected with piston 2 by locating stud 4.Be provided with return spring 5 between one end of piston 2 and the cavity 3.The length of cavity 3 openings equals piston 2 running lengths.
The piston 2 of band locating stud 4 is installed in the piston cavity 3 on the camshaft 1, return spring 5 is installed on the another side of piston 2, the partly outstanding cylndrical surface with camshaft 1 of piston 2 pins of band locating stud 4 is connected with pin-and-hole in cam 1 mounting hole by projection.
Working principle: along with the oil pressure in the oil duct 7 of camshaft 1 raises, pressure in the compression chamber raises, it is big that volume becomes, promote piston 2 and be moved to the left (also can realize moving right) by changing locations of structures, return spring 5 is compressed, the pin of piston 2 upper process drove cam 6 and moved this moment, cam 6 surfaces in rocking arm roller or valve very the base position of tube change, promptly molded lines changes.Oil pressure in the oil duct 7 of camshaft 1 reduces, piston 2 under the elastic force effect of return spring 5, move right (also can realize being moved to the left) by changing locations of structures, drive cam 6 and move right, this moment, cam 6 was sent out change in the contact position of rocker arm body, and promptly molded lines changes.
The elastic force of return spring 5 is not being set under the prerequisite of figure with the VVT oil pressure through calculating, and the size of oil pressure is adjusted by control VVT solenoid valve by automatically controlled program.Cam 6 shown in Figure 3 is processed separately, and it has many group molded lines, can be fit to a plurality of speed range or each rotating speed (designing according to real needs).
In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technological scheme carry out; or design of the present utility model and technological scheme are directly applied to other occasion without improving, all within protection domain of the present utility model.
Claims (4)
1, a kind of full variable cam molded lines mechanism, comprise camshaft (1), it is characterized in that: described camshaft (1) is provided with the cavity (3) that communicates with oil duct (7), be provided with the piston (2) of band locating stud (4) in the cavity (3), at least the cam (6) that is provided with two above molded lines (8) is sleeved on the camshaft (1), is connected with piston (2) by locating stud (4).
2, a kind of full variable cam molded lines according to claim 1 mechanism is characterized in that: be provided with return spring (5) between an end of described piston (2) and the cavity (3).
3, a kind of full variable cam molded lines according to claim 1 mechanism, it is characterized in that: described cam (6) is provided with many group molded lines.
4, a kind of full variable cam molded lines according to claim 1 and 2 mechanism, it is characterized in that: the length of described cavity (3) opening equals piston (2) running length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820217095U CN201391340Y (en) | 2008-12-17 | 2008-12-17 | Fully-changeable cam molded line mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820217095U CN201391340Y (en) | 2008-12-17 | 2008-12-17 | Fully-changeable cam molded line mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201391340Y true CN201391340Y (en) | 2010-01-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820217095U Expired - Fee Related CN201391340Y (en) | 2008-12-17 | 2008-12-17 | Fully-changeable cam molded line mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201391340Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967555A (en) * | 2014-04-25 | 2014-08-06 | 天津大学 | Variable valve lift device based on movable cam |
| CN105240084A (en) * | 2015-11-06 | 2016-01-13 | 杭州新坐标科技股份有限公司 | Mechanism capable of realizing lift and secondary opening of variable valve |
| CN105240083A (en) * | 2015-11-06 | 2016-01-13 | 杭州新坐标科技股份有限公司 | Two-section variable valve lift and valve secondary opening mechanism |
-
2008
- 2008-12-17 CN CN200820217095U patent/CN201391340Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967555A (en) * | 2014-04-25 | 2014-08-06 | 天津大学 | Variable valve lift device based on movable cam |
| CN103967555B (en) * | 2014-04-25 | 2016-05-04 | 天津大学 | A kind of variable air valve lift apparatus based on movable cam |
| CN105240084A (en) * | 2015-11-06 | 2016-01-13 | 杭州新坐标科技股份有限公司 | Mechanism capable of realizing lift and secondary opening of variable valve |
| CN105240083A (en) * | 2015-11-06 | 2016-01-13 | 杭州新坐标科技股份有限公司 | Two-section variable valve lift and valve secondary opening mechanism |
| CN105240084B (en) * | 2015-11-06 | 2017-10-27 | 杭州新坐标科技股份有限公司 | The mechanism of lift range variable and secondary opening can be achieved |
| CN105240083B (en) * | 2015-11-06 | 2017-10-31 | 杭州新坐标科技股份有限公司 | A kind of two-part lift range variable and secondary opening of air valve mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20131217 |