CN207847786U - A kind of Gasoline Engines with High Compression Ratio .. piston - Google Patents
A kind of Gasoline Engines with High Compression Ratio .. piston Download PDFInfo
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- CN207847786U CN207847786U CN201820158789.7U CN201820158789U CN207847786U CN 207847786 U CN207847786 U CN 207847786U CN 201820158789 U CN201820158789 U CN 201820158789U CN 207847786 U CN207847786 U CN 207847786U
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- boss
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- pit
- avoid holes
- cambered surface
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Abstract
The utility model provides a kind of Gasoline Engines with High Compression Ratio .. piston, belongs to engine art.It solves the problems, such as that existing Gasoline Engines with High Compression Ratio .. piston Tumble and swirl and tubulence energy are relatively low.This Gasoline Engines with High Compression Ratio .. piston, including top surface on piston, the both sides of top surface are respectively provided with first boss and second boss on the piston, there is pit between the first boss and second boss, the pit is arc-shaped, the pit each point along first boss to second boss direction curvature all same and more than along perpendicular to first boss and second boss line direction curvature.The pit of the utility model is designed using special cambered surface, is influenced smaller to combustion chamber volume, and form wall surface guiding to the gas of process, is improved Tumble and swirl and tubulence energy, improve combustion thermal efficiency.
Description
Technical field
The utility model belongs to technical field of engines, is related to a kind of piston, and especially a kind of Gasoline Engines with High Compression Ratio .. is lived
Plug.
Background technology
Engine is one of kernel component of automobile as power output device.The performance of engine for automobile extremely
Close it is important, studies have shown that the performance and efficiency of engine can be effectively improved by improving the compression ratio of engine and Tumble and swirl, therefore
The present major Automobile Design company in countries in the world all spends very big energy on improving engine compression ratio, and this is also engine
One of the field being most difficult to is developed, before this needs the coordination of various aspects, and experiment therein and simulating developer are also required to largely
Phase data supporting.Especially high thermal efficiency caused by high compression ratio, low oil consumption, low emission are constantly chasing after for engine designer
One of ask.And influence of the combustion chamber volume of piston to engine compression ratio play the role of it is vital.But it is big at present multiple
Motivation easily generates such as engine combustion Tumble and swirl after improving compression ratio and tubulence energy declines, pinking aggravation, or even lives
The interference problems such as plug and valve, cylinder cap.
Such as Chinese patent application (application number：201620985045.3) disclose a kind of tumble flow guidance type gasoline engine high pressure contracting
Than piston, including piston-top surface, the first, second boss top surface, hemispherical piston crater and tumble flow channel, pass through first,
Two boss reduce the volume of combustion chamber, improve compression ratio, and do not reduce Tumble intensity and raising by tumble flow channel and pit
Tubulence energy.However, there is also following disadvantages for the technical solution：1, pit uses hemispherical so that gas is not easy after entering pit
It goes out, it is poor so as to cause the gas fluidity in pit, and also hemispherical is poor for the guidance capability of gas, easily leads to gas
Body is globally spread towards surrounding, raising for gas tubulence energy and Tumble and swirl and its limited；2, between pit and tumble flow channel
Transition is unsmooth, and certain kinetic energy can be lost when passing the gas through, to reduce the Tumble and swirl of gas, to reduce engine
Performance.
Invention content
The purpose of this utility model is the presence of the above problem in view of the prior art, it is proposed that a kind of Gasoline Engines with High Compression Ratio ..
Piston, technical problem to be solved in the utility model are：How keep engine high pressure contracting ratio in the case of improve tumble flow
Than.
The purpose of this utility model can be realized by following technical proposal：
A kind of Gasoline Engines with High Compression Ratio .. piston, including top surface on piston, the both sides of top surface are respectively provided on the piston
One boss and second boss have pit between the first boss and second boss, the pit is arc-shaped, and the pit is each
Put the curvature all same along first boss to second boss direction and more than along perpendicular to first boss and second boss line side
To curvature.
Two boss higher than top surface on piston are arranged in top surface on piston, can greatly reduce piston combustion bowl volume, carry
High compression ratio.Pit is designed using special cambered surface, can either play the role of traditional pit, and high rapids is formed in the bottom of pit
Kinetic energy area and sufficient flame development space, make gas fully burn rapidly, to be applied to the powerful kinetic energy of piston, and pit
Curvature along two boss line directions is larger and the curvature along vertical two boss line direction is smaller, passes the gas through pit
When, entire pit also act as guiding gas flow effect, gas can along the smaller direction flow at high speed of pit curvature, to
Improve the tubulence energy and Tumble and swirl of gas.Moreover, the cambered surface design of the pit has smaller volume, makes combustion compared to spherical surface
The increase smaller for burning room volume, to make combustion chamber that there is higher compression ratio.
In above-mentioned Gasoline Engines with High Compression Ratio .. piston, the first inlet valve evacuation is also had on the piston on top surface
Hole, the second inlet valve avoid holes, first row valve avoid holes and second row valve avoid holes, the first inlet valve avoid holes and
First row valve avoid holes are located at the both sides of first boss, the second inlet valve avoid holes and second row valve avoid holes
It is located at the both sides of second boss, and the first inlet valve avoid holes and the second inlet valve avoid holes are located at the same of top surface on piston
Side, the first row valve avoid holes and second row valve avoid holes are located at and the first inlet valve avoid holes and the second inlet valve
The opposite other side of avoid holes.The setting of inlet valve avoid holes and exhaust valve avoid holes avoid on piston top surface and inlet valve and
Exhaust valve collides.
In above-mentioned Gasoline Engines with High Compression Ratio .. piston, a diameter of 60~100mm of the piston, the pit is along first
A diameter of 280~the 320mm of camber line in boss to second boss direction, the pit is along vertical first boss to second boss line
A diameter of 60~80mm in direction.It is more preferable in the water conservancy diversion effect of the size range, pit cambered surface, the rolling of gas can be greatly improved
Stream ratio and tubulence energy.
In above-mentioned Gasoline Engines with High Compression Ratio .. piston, the pit is made of tangent the first cambered surface and the second cambered surface,
Wherein the first cambered surface is located at the first inlet valve and the second inlet valve side, and the second cambered surface is located at first row valve and second row valve
Side, diameter of first cambered surface with the second cambered surface along first boss to second boss direction is identical, and along perpendicular to first boss
With second boss line direction, the diameter of the first cambered surface is less than the diameter of the second cambered surface.When work, gas is first in curvature bigger
Burning in first cambered surface, and run through the second more flat cambered surface and form swiftly flowing air-flow, to drive entire combustion
Indoor air-flow is burnt, the burning of gas is accelerated, to improve the output power of piston.
In above-mentioned Gasoline Engines with High Compression Ratio .. piston, along first boss to second boss direction, the first cambered surface and second
The diameter of cambered surface is 60~100mm；Along perpendicular to first boss to second boss line direction, the diameter of first cambered surface
For 70~100mm, a diameter of 130~170mm of second cambered surface.
In above-mentioned Gasoline Engines with High Compression Ratio .. piston, top surface tool is opened on the boss there are one boss on the piston
There is above-mentioned pit, so that the boss is formed above-mentioned first boss and above-mentioned second boss, the minimum point of the pit is on piston
Below top surface on 10mm to piston between top face 5mm.
In this way, influence smaller of the volume of pit to combustion chamber volume, i.e. the influence smaller to compression ratio, and in the model
In enclosing, pit opens up the structural strength that will not reduce top surface on piston, keeps piston structure more firm, the service life is longer.
Compared with prior art, the utility model has the following advantages：
1, the pit of top surface uses cambered design on the piston of the utility model, makes the volume smaller of pit, to reduce
Influence to combustion chamber volume.
2, the pit of the utility model can either form high tubulence energy area and sufficient flame development space, and energy in bottom
Wall surface guiding is enough formed, gas directed flow is guided, increases Tumble and swirl, improves combustion thermal efficiency.
Description of the drawings
Fig. 1 is the stereogram of embodiment one；
Fig. 2 is the stereogram at one another visual angle of embodiment；
Fig. 3 is the vertical view of embodiment one；
Fig. 4 is the sectional view of the line A-A along Fig. 3；
Fig. 5 is the sectional view of the line B-B along Fig. 3；
Fig. 6 is the sectional view of embodiment two.
In figure, 1, top surface on piston；2, first boss；3, second boss；4, pit；41, the first cambered surface；42, the second arc
Face；51, the first inlet valve avoid holes；52, the second inlet valve avoid holes；61, first row valve avoid holes；62, second row valve
Avoid holes.
Specific implementation mode
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
Embodiment one
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of Gasoline Engines with High Compression Ratio .. piston, including top surface 1 on piston, top surface 1 on piston
On be respectively equipped with first boss 2, second boss 3, pit 4, the first inlet valve avoid holes 51, the second inlet valve avoid holes 52,
One exhaust valve avoid holes 61 and second row valve avoid holes 62.
Wherein, first boss 2 and second boss 3 are located at the both sides of top surface 1 on piston, and pit 4 is located at first boss 2
Between second boss 3, the first inlet valve avoid holes 51, the second inlet valve avoid holes 52, first row valve avoid holes 61 and
Two exhaust valve avoid holes 62 are distributed in quadrangle, and the first inlet valve avoid holes 51 and first row valve avoid holes 61 are located at first
The both sides of boss 2, the second inlet valve avoid holes 52 and second row valve avoid holes 62 are located at the both sides of second boss 3, and
First inlet valve avoid holes 51 and the second inlet valve avoid holes 52 are located at the same side of top surface 1 on piston, first row valve evacuation
Hole 61 and second row valve avoid holes 62 are located at opposite with the first inlet valve avoid holes 51 and the second inlet valve avoid holes 52 another
Side interferes or collides with inlet valve and exhaust valve when moving up and down this avoid piston.
For convenience of description, set first boss 2 to second boss 3 direction as X-direction, perpendicular to X-axis and with work
The parallel direction in top surface 1 is Y direction beyond the Great Wall.As shown in Fig. 3, Fig. 4, Fig. 5, a diameter of 60~100mm of piston, pit 4 is in
Arc, pit 4 is along a diameter of 60~80mm of X-direction, and along a diameter of 280~320mm of Y direction, and pit 4 is minimum
For point less than top surface 15mm on piston, it is in the channel shape extended along Y direction to make pit 4.First boss 2 and second boss 3 can be with
It is two boss with gap, can also be by a boss by opening up the first boss 2 and second that above-mentioned pit 4 is formed
Boss 3, in actual application, as needed, the minimum point of pit 4 can be on piston below top surface 1 on 10mm to piston
It is selected in the range of 1 top 5mm of top surface.When the gas that air and gasoline mix enters combustion chamber by pit 4, by pit
4 wall surface guiding, gas will produce strong eddy flow, and air is made to be sufficiently mixed uniformly with gasoline, and when burning is more abundant, and burning is fast
It spends faster, to improve the power output of piston.
Embodiment two
The technical solution of the present embodiment and the technical solution of embodiment one are essentially identical, the difference is that, such as Fig. 6 institutes
Show, the pit 4 in the present embodiment is made of tangent the first cambered surface 41 and the second cambered surface 42, wherein the first cambered surface 41 is located at first
Inlet valve and the second inlet valve side, the second cambered surface 42 are located at first row valve and second row valve side, 41 He of the first cambered surface
The diameter of second cambered surface 42 in the X-axis direction is identical, is 60~100mm；In the Y-axis direction, the first cambered surface 41 is a diameter of
70~100mm, a diameter of 130~170mm of the second cambered surface 42, and the first cambered surface 41 and the second cambered surface 42 are in the X-axis direction
Diameter is respectively less than diameter in the Y-axis direction, makes pit 4 integrally in the channel shape extended along Y direction.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although top surface 1 on piston, first boss 2, second boss 3, pit 4, the first inlet valve is used more herein
The terms such as avoid holes 51, the second inlet valve avoid holes 52, but it does not preclude the possibility of using other terms.Use these terms
Just for the sake of more easily describing and explaining the essence of the utility model；It is construed as any one of the additional limitations all
It is contrary to the spirit of the present invention.
Claims (6)
1. a kind of Gasoline Engines with High Compression Ratio .. piston, including top surface (1) on piston, the both sides of top surface (1) have respectively on the piston
There are first boss (2) and second boss (3), there is pit (4), feature between the first boss (2) and second boss (3)
It is, the pit (4) is arc-shaped, and pit (4) each point is equal along the curvature of first boss (2) to second boss (3) direction
It is identical and more than along perpendicular to first boss (2) and second boss (3) line direction curvature.
2. Gasoline Engines with High Compression Ratio .. piston according to claim 1, which is characterized in that on the piston on top surface (1) also
Have the first inlet valve avoid holes (51), the second inlet valve avoid holes (52), first row valve avoid holes (61) and second
It is convex that exhaust valve avoid holes (62), the first inlet valve avoid holes (51) and first row valve avoid holes (61) are located at first
The both sides of platform (2), the second inlet valve avoid holes (52) and second row valve avoid holes (62) are located at second boss (3)
Both sides, and the first inlet valve avoid holes (51) and the second inlet valve avoid holes (52) are located at the same side of top surface (1) on piston,
The first row valve avoid holes (61) and second row valve avoid holes (62) are located at and the first inlet valve avoid holes (51) and the
The opposite other side of two inlet valve avoid holes (52).
3. Gasoline Engines with High Compression Ratio .. piston according to claim 2, which is characterized in that a diameter of the 60 of the piston~
100mm, the pit (4) along first boss (2) to second boss (3) direction camber line a diameter of 280~320mm, it is described recessed
Cheat a diameter of 60~80mm that (4) arrive second boss (3) line direction along vertical first boss (2).
4. Gasoline Engines with High Compression Ratio .. piston according to claim 2, which is characterized in that the pit (4) is by tangent
One cambered surface (41) and the second cambered surface (42) composition, wherein the first cambered surface (41) is located at the first inlet valve and the second inlet valve side,
Second cambered surface (42) is located at first row valve and second row valve side, and the first cambered surface (41) and the second cambered surface (42) are convex along first
The diameter in platform (2) to second boss (3) direction is identical, and along perpendicular to first boss (2) and second boss (3) line direction,
The diameter of first cambered surface (41) is less than the diameter of the second cambered surface (42).
5. Gasoline Engines with High Compression Ratio .. piston according to claim 4, which is characterized in that convex to second along first boss (2)
The diameter of platform (3) direction, the first cambered surface (41) and the second cambered surface (42) is 60~100mm；Edge is arrived perpendicular to first boss (2)
Second boss (3) line direction, a diameter of 70~100mm of first cambered surface (41), the diameter of second cambered surface (42)
For 130~170mm.
6. the Gasoline Engines with High Compression Ratio .. piston according to claim 3 or 5, which is characterized in that top surface (1) has on the piston
There are one boss, it is provided with above-mentioned pit (4) on the boss, the boss is made to form above-mentioned first boss (2) and above-mentioned second
Boss (3), the minimum point of the pit (4) is on piston below top surface (1) on 10mm to piston above top surface (1) between 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820158789.7U CN207847786U (en) | 2018-01-30 | 2018-01-30 | A kind of Gasoline Engines with High Compression Ratio .. piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820158789.7U CN207847786U (en) | 2018-01-30 | 2018-01-30 | A kind of Gasoline Engines with High Compression Ratio .. piston |
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| Publication Number | Publication Date |
|---|---|
| CN207847786U true CN207847786U (en) | 2018-09-11 |
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ID=63413562
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820158789.7U Active CN207847786U (en) | 2018-01-30 | 2018-01-30 | A kind of Gasoline Engines with High Compression Ratio .. piston |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281750A (en) * | 2018-09-25 | 2019-01-29 | 宁波吉利罗佑发动机零部件有限公司 | A kind of high compression engine combustion chamber |
| CN115329608A (en) * | 2022-10-14 | 2022-11-11 | 潍柴动力股份有限公司 | Piston design method and piston |
-
2018
- 2018-01-30 CN CN201820158789.7U patent/CN207847786U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281750A (en) * | 2018-09-25 | 2019-01-29 | 宁波吉利罗佑发动机零部件有限公司 | A kind of high compression engine combustion chamber |
| CN115329608A (en) * | 2022-10-14 | 2022-11-11 | 潍柴动力股份有限公司 | Piston design method and piston |
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