CN112682171A - Variable compression ratio engine - Google Patents
Variable compression ratio engine Download PDFInfo
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- CN112682171A CN112682171A CN202110005588.XA CN202110005588A CN112682171A CN 112682171 A CN112682171 A CN 112682171A CN 202110005588 A CN202110005588 A CN 202110005588A CN 112682171 A CN112682171 A CN 112682171A
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- ratio engine
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- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000033001 locomotion Effects 0.000 description 11
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
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- 230000002452 interceptive effect Effects 0.000 description 1
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Abstract
The invention discloses a variable compression ratio engine which comprises a shell, wherein a transmission structure is arranged in the shell, a moving structure is meshed with the transmission structure, a piston is arranged on the moving structure, and the transmission structure moves so that the moving structure drives the piston to move up and down to change the compression ratio of the engine. The variable compression ratio engine provided by the invention can adjust the compression ratio at any time according to different load and working condition of the engine, and the length of the connecting rod of the engine is controlled through the multi-connecting-rod structure to influence the positions of the upper stop point and the lower stop point of the piston, so that the volume of a combustion chamber is changed, and the compression ratio of the engine is finally changed. Under the condition of the same displacement, the high-speed high-.
Description
Technical Field
The invention relates to the technical field of variable compression ratio engines, in particular to a variable compression ratio engine.
Background
The automobile engine still has no breakthrough technology to date, namely the variable compression ratio technology, most of the engines of all mass production in the world are fixed compression ratio engines, the performance of the fixed compression ratio engines is stable and reliable, the new performance of the technical innovation is perfect after decades, but the defects are obvious, namely the fixed compression ratio can not adapt to all working condition requirements, so that the indexes of energy efficiency, emission and the like can not be further improved, although various major host factories strive for breakthrough in the aspect of the variable compression ratio, various solutions of the variable compression ratio are proposed, but the technical problems and bottlenecks which can not be broken through are encountered, either the structure is complex and the control is difficult, the cost is too high, or the stability is poor and the mass production cannot be carried out, the common engine structure is a single-connecting-rod single-crankshaft structure, although the engine is simple and efficient, but has the defects of the reasons, namely the compression ratio is fixed, the dynamic property, the economical efficiency, the emission property and the like of the engine cannot be well unified.
Disclosure of Invention
The invention aims to provide a variable compression ratio engine, which solves the technical problem that the large compression ratio adjusting structure of the existing compressor is complicated in the background technology.
In order to achieve the above object, the present invention provides a variable compression ratio engine, comprising:
the utility model provides a variable compression ratio engine, includes the casing, is provided with transmission structure in the casing, and transmission structure meshes has the removal structure, is provided with the piston on the removal structure, thereby transmission structure rotates and makes the change that the removal structure drove piston motion upper and lower dead center realize the change of engine compression ratio.
Furthermore, the transmission structure comprises a motor, the motor is rotatably connected with a driving shaft, and one end of the driving shaft is movably connected with a driven shaft, so that the motor drives the driven shaft to rotate.
Furthermore, a driving bevel gear is arranged on the driven shaft, a driven bevel gear is meshed with the driving bevel gear, and the driving bevel gear rotates to drive the driven bevel gear to rotate, so that the transmission structure drives the moving structure to move.
Further, the driving bevel gear and the driven bevel gear are vertically disposed.
Further, driven bevel gear sets up the bottom surface at the connecting plate, has seted up the through-hole on the connecting plate, fixedly connected with pillar in the through-hole, and the pillar that the connecting plate lower surface set up is connected with the second connecting rod, and the bottom of second connecting rod is connected with the bent axle.
Furthermore, an internal thread is arranged on the inner wall of the support column, an external thread is arranged on the outer wall of the upper end of the second connecting rod, and the inner wall of the support column is in threaded connection with the outer wall of the second connecting rod.
Furthermore, the outer wall of the pillar arranged on the upper surface of the connecting plate is provided with a limiting table, and the limiting table is matched with a first connecting rod.
Furthermore, the first connecting rod comprises a rod body, a first fixing shell is arranged at the bottom end of the rod body, a containing groove is formed in the first fixing shell, and a limiting table is arranged in the containing groove.
Furthermore, one end of the first fixing shell is provided with a first fixing frame in the direction of the second connecting rod, and the first fixing frame is used for being fixed with the driven shaft.
Further, the top end of the rod body is rotatably connected with the piston.
The variable compression ratio engine has the following advantages: the variable compression ratio engine provided by the invention can adjust the compression ratio at any time according to different load and working condition of the engine, and the length of the connecting rod of the engine is controlled through the multi-connecting-rod structure to influence the positions of the upper stop point and the lower stop point of the piston, so that the volume of a combustion chamber is changed, and the compression ratio of the engine is finally changed. Under the condition of the same displacement, the high-speed high-.
Drawings
FIG. 1 is a schematic illustration of a variable compression ratio engine according to the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic structural diagram of the transmission structure and the moving structure of the variable compression ratio engine of the present invention;
fig. 5 is an exploded view of the transmission structure and the moving structure of the variable compression ratio engine of the present invention.
Description of reference numerals: 1. a housing; 2. a transmission structure; 21. a motor; 22. a shaft core; 23. a drive shaft; 231. a shaft body; 232. a connecting seat; 233. a support; 24. a driven shaft; 241. a shaft body; 242. a fixed seat; 243. a drive bevel gear; 3. a moving structure; 31. a piston; 32. a first link; 321. a rod body; 322. a first stationary case; 323. a containing groove; 324. a first fixing frame; 33. a connecting rod cover body; 331. a second stationary case; 332. a second fixing frame; 34. a second link; 35. a third link; 351. a pillar; 352. a driven bevel gear; 353. a limiting table; 354. a connecting plate; 4. a crankshaft.
Detailed Description
For a better understanding of the objects, structure and function of the invention, a variable compression ratio engine according to the invention will be described in more detail with reference to the accompanying fig. 1-5.
As shown in FIG. 1, the present invention provides a variable compression ratio engine, which includes a housing 1, a transmission structure 2 is disposed in the housing 1, the transmission structure 2 is engaged with a moving structure 3, a piston 31 is disposed on the moving structure 3, and the transmission structure 2 rotates to make the upper and lower dead points of the movement of the piston 31 driven by the moving structure 3 change to realize the change of the compression ratio of the engine.
As shown in fig. 2 to 5, the transmission structure 2 includes a motor 21, the motor 21 is rotatably connected to a driving shaft 23, and one end of the driving shaft 23 is movably connected to a driven shaft 24, so that the motor 21 drives the driven shaft 24 to rotate.
The driving shaft 23 comprises a shaft core 22, one end of the shaft core 22 is provided with a connecting seat, the connecting seat 232 is connected with the connecting seat 232 at one end of the motor 21 through a cross shaft, the other end of the shaft core 22 is an external spline and is connected with an internal spline of the driving shaft 23, and the shaft core can drive the driving shaft 23 to rotate.
One end of the driven shaft 24 is provided with a fixed seat 242, and the fixed seat 242 and the connecting seat 232 are movably connected through a connecting piece, so that the rotating connection of the driving shaft 23 and the driven shaft 24 is realized.
The driven shaft 24 is provided with a driving bevel gear 243, the driving bevel gear 243 is engaged with a driven bevel gear 352, and the driving bevel gear 243 rotates to drive the driven bevel gear 352 to rotate, so that the transmission structure 2 drives the moving structure 3 to move.
The driving bevel gear 243 and the driven bevel gear 352 are vertically arranged to convert the horizontal movement of the transmission structure 2 into the vertical movement of the mobile structure 3, thereby realizing the direction conversion and enabling the mobile structure 3 to move up and down in the vertical direction.
The driven bevel gear 352 is disposed on the bottom surface of the connecting plate 354, a through hole is formed in the connecting plate 354, a support 351 is fixedly connected to the through hole, and a threaded hole is formed in the support 351 disposed on the lower surface of the connecting plate 354 and is connected to the connecting rod 34 in a screw pair manner. The bottom end of the second connecting rod 34 is connected with the crankshaft 4, thereby realizing the motion of the crankshaft 4 of the engine.
Be provided with the internal thread on the inner wall of pillar 351, be provided with the external screw thread on the upper end outer wall of second connecting rod 34, the inner wall of pillar 351 and the outer wall threaded connection of second connecting rod 34 to realize first connecting rod 32 and reciprocate in vertical direction, thereby change the change of the upper and lower dead center of piston motion.
The outer wall of the pillar 351 arranged on the upper surface of the connecting plate 354 is provided with a limiting table 353, and the limiting table 353 is used for being matched with the first connecting rod 32.
The first link 32 includes a rod body 321, a first fixing shell 322 is disposed at a bottom end of the rod body 321, a receiving groove 323 is formed on the first fixing shell 322, and a position-limiting table 353 is disposed in the receiving groove 323.
One end of the first fixing shell 322 is provided with a first fixing frame 324 towards the direction of the second connecting rod 34, and the first fixing frame 324 is used for fixing with the driven shaft 24, so as to realize the stable movement of the moving structure 3.
Be provided with second stationary housing 331 on first stationary housing 322, the one end of second stationary housing 331 is provided with second mount 332 along the direction of second connecting rod, first stationary housing 322 and the fixed casing 331 of second form the storage tank 323 body that holds spacing platform 353, the bottom of first mount 324 and second mount 332 is provided with the circular arc groove relatively, two circular arc groove formation round holes, the axis body 241 sets up in the circular hole that first mount 324 and second mount 332 formed, thereby the realization will move the firm fixing on drive structure 2 of structure 3.
The top end of the rod body 321 is rotatably connected with the piston 31, so that the movement of the moving structure 3 drives the upper and lower dead points of the piston 31 to change, thereby changing the volume of the combustion chamber and finally changing the ratio of the engine compressor from 8:1 to 14: 1.
According to the control process of the variable compression ratio engine provided by the invention, when the compression ratio needs to be changed, the motor 21 rotates to drive the driving shaft 23 to rotate, the driving shaft 23 drives the driven shaft 24 to rotate, the driven shaft 24 drives the support 351 to rotate through conical gear engagement, the support 351 makes spiral motion on the second connecting rod 34, the limit table 352 at one end of the support 351 is installed on the accommodating groove 323 at one end of the first connecting rod 32, and the support 351 makes spiral motion to drive the first connecting rod 32 to move up and down, so that the relative position of the second connecting rod 34 and the first connecting rod 32 is changed. When the engine runs stably and the compression ratio is stabilized at a certain value, the motor 21 stops working, the moving structure 3 stops moving up and down, and does planar motion along with the transmission structure 2 without interfering the normal running of the engine.
The variable compression ratio engine provided by the invention solves the contradiction between engine supercharging and self-suction. Because the rotating speed of the turbocharged engine is always too low when the turbocharged engine starts, the boost degree and the torque rise slowly, so-called boost hysteresis is formed, and the acceleration of the automobile in low-speed running is slow. The supercharging function of the turbine can be acted only after the engine is accelerated to a certain rotating speed, and the compression ratio can be adjusted at any time according to different loads and working conditions of the engine. The principle is to lower the compression ratio at high load to prevent knocking and to raise the compression ratio at low load to improve fuel economy. The application of the variable compression ratio technology can enable the dynamic property, the economical efficiency, the emission property and the like of the engine to be better unified. It also makes the overall size of the engine smaller, thereby reducing the limited installation space on the vehicle. Under the condition of the same displacement, the high-speed high-.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The variable compression ratio engine is characterized by comprising a shell (1), wherein a transmission structure (2) is arranged in the shell (1), the transmission structure (2) is meshed with a moving structure (3), a piston (31) is arranged on the moving structure (3), and the transmission structure (2) rotates to enable the moving structure (3) to drive the piston (31) to change the upper dead point and the lower dead point so as to change the compression ratio of the engine.
2. Variable compression ratio engine according to claim 1, characterized in that the transmission structure (2) comprises an electric motor (21), the electric motor (21) is rotatably connected with a driving shaft (23), one end of the driving shaft (23) is movably connected with a driven shaft (24), so that the electric motor (21) drives the driven shaft (24) to rotate.
3. The variable compression ratio engine according to claim 2, characterized in that the driven shaft (24) is provided with a driving bevel gear (243), the driving bevel gear (243) is engaged with a driven bevel gear (352), and the driving bevel gear (243) rotates to drive the driven bevel gear (352) to rotate, so that the transmission structure (2) drives the moving structure (3) to move.
4. The variable compression ratio engine according to claim 3, characterized in that the drive bevel gear (243) and the driven bevel gear (352) are vertically disposed.
5. The variable compression ratio engine according to claim 4, characterized in that the driven bevel gear (352) is arranged on the bottom surface of the connecting plate (354), a through hole is formed in the connecting plate (354), a strut (351) is fixedly connected in the through hole, the strut (351) arranged on the lower surface of the connecting plate (354) is spirally connected with the second connecting rod (34), and the bottom end of the second connecting rod (34) is connected with the crankshaft (4).
6. The variable compression ratio engine according to claim 5, characterized in that an inner wall of the strut (351) is provided with an internal thread, an outer wall of the upper end of the second link (34) is provided with an external thread, and the inner wall of the strut (351) and the outer wall of the second link (34) are screw-coupled.
7. A variable compression ratio engine according to claim 5, characterized in that a limit stop (353) is provided on the outer wall of the strut (351) provided on the upper surface of the connecting plate (354), the limit stop (353) being fitted with the first connecting rod (32).
8. The variable compression ratio engine according to claim 7, characterized in that the first connecting rod (32) comprises a rod body (321), a first fixed shell (322) is arranged at the bottom end of the rod body (321), a containing groove (323) is formed in the first fixed shell (322), and a limiting table (353) is contained in the containing groove (323).
9. The variable compression ratio engine according to claim 8, characterized in that one end of the first stationary case (322) is provided with a first stationary bracket (324) toward the second connecting rod (34), the first stationary bracket (324) being for fixing with the driven shaft (24).
10. Variable compression ratio engine according to claim 8, characterized in that the top end of the rod body (321) and the piston (31) are rotationally connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110005588.XA CN112682171A (en) | 2021-01-05 | 2021-01-05 | Variable compression ratio engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110005588.XA CN112682171A (en) | 2021-01-05 | 2021-01-05 | Variable compression ratio engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112682171A true CN112682171A (en) | 2021-04-20 |
Family
ID=75457139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110005588.XA Pending CN112682171A (en) | 2021-01-05 | 2021-01-05 | Variable compression ratio engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112682171A (en) |
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2021
- 2021-01-05 CN CN202110005588.XA patent/CN112682171A/en active Pending
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