CN206972392U - A kind of engine piston and engine - Google Patents
A kind of engine piston and engine Download PDFInfo
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- CN206972392U CN206972392U CN201720464115.5U CN201720464115U CN206972392U CN 206972392 U CN206972392 U CN 206972392U CN 201720464115 U CN201720464115 U CN 201720464115U CN 206972392 U CN206972392 U CN 206972392U
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- piston
- engine
- hole
- top land
- annular groove
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Abstract
The utility model provides a kind of engine piston and engine, and engine piston includes：Top land, piston crown and the piston skirt being sequentially connected；Wherein, top land, which is provided with, multiple keeps away valve pool；Piston crown is provided with annular groove, and multiple through holes for leading to engine piston inner chamber by annular groove are provided with annular groove.The utility model solves engine piston because piston-top surface rises, and reduces with valve motion gap, causes to produce the problem of piston collides with valve in engine operation process.
Description
Technical field
Technical field of engines is the utility model is related to, more particularly to a kind of engine piston and engine.
Background technology
Piston is automobile engine " heart ", and in the working cycles of engine, piston is used for bearing gas pressure, and
Bent axle is driven to rotate by connecting rod by piston pin, so as to which chemical energy is converted into mechanical energy and externally exported.Piston is in high temperature, height
Worked under conditions of pressure, high speed, insufficient lubrication, bear the mechanical load and thermic load of alternation, be that condition of work is most in engine
For one of severe key components and parts.Top land or the part of combustion chamber, are directly contacted with high-temperature gas.
Therefore, piston need to possess heat resistance, wearability, stable guidance quality and good sealing function, reduce as far as possible
The frictional work loss of engine, reduces oil consumption, noise and discharge.To improve the performance and efficiency of engine, ensureing that piston is strong
Degree, rigidity meet on the premise of requiring that reduction frictional work loses, and reduces piston weight, it is necessary to improve piston compression ratio, ensure to live
Plug and valve clearance etc..
However, to improve piston compression ratio, piston compression height need to be improved, therefore piston-top surface rises, with valve motion
Gap reduces, and causes to produce piston and valve collision problem in engine operation process.
Utility model content
The utility model provides a kind of engine piston and engine, and its purpose is to solve because on piston-top surface
Rise, reduce with valve motion gap, cause to produce the problem of piston collides with valve in engine operation process.
To achieve these goals, embodiment of the present utility model provides a kind of engine piston, engine piston bag
Include：
Top land, piston crown and the piston skirt being sequentially connected；Wherein,
Top land, which is provided with, multiple keeps away valve pool；
Piston crown is provided with annular groove, and multiple through holes for leading to engine piston inner chamber by annular groove are provided with annular groove.
Preferably, annular groove includes oil ring groove and compression；
Through hole is arranged on oil ring groove.
Preferably, keeping away valve pool includes being located at the first of the exhaust side of the top land air inlet side for keeping away valve pool and top land
Second keeps away valve pool.
Preferably, piston skirt is provided with pin-and-hole；
Pin-and-hole is noncircular pin hole.
Preferably, the offset at the center of pin-and-hole and the center of engine piston is 0.8 millimeter.
To achieve these goals, embodiment of the present utility model additionally provides a kind of engine, including above-mentioned engine
Piston.
Such scheme of the present utility model has following beneficial effect：
Engine piston provided by the utility model, valve pool is kept away by being set in top land, when top land and valve
When close, presence of the valve due to keeping away valve pool is difficult to produce collision with top land, therefore can effectively be avoided because collision generation is hot
Amount, causing to keep away valve pool position turns into hot localised points, and severe patient even results in engine piston and ruptured；And keep away the arc of valve pool
The cell wall of edge uses inclined design, to increase avoiding space, reduces risk for knock；The oil ring groove of piston crown is provided with logical
To the through hole of internal diameter, cooling machine oil can be made to flow out to oil ring groove by inner chamber, on the one hand play cooling effect to piston skirt, one
Aspect plays lubrication to oil ring groove.The utility model solves engine piston because piston-top surface rises, with valve motion
Gap reduces, and causes to produce the problem of piston collides with valve in engine operation process.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the utility model embodiment, below by the utility model embodiment
The required accompanying drawing used is briefly described in description, it should be apparent that, drawings in the following description are only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation for the engine piston that embodiment of the present utility model provides；
Fig. 2 represents Fig. 1 top view；
Fig. 3 represents Fig. 2 A-A to sectional view.
Description of reference numerals：
1st, top land；2nd, piston crown；3rd, piston skirt；4th, valve pool is kept away；5th, through hole；6th, oil ring groove；7th, compression；8、
Pin-and-hole；9th, first valve pool is kept away；10th, second valve pool is kept away.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
The finger such as degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer "
The orientation or position relationship shown be based on orientation shown in the drawings or position relationship, be for only for ease of description the utility model and
Simplify description, rather than the device or element of instruction or hint meaning there must be specific orientation, with specific azimuth configuration
And operation, therefore it is not intended that to limitation of the present utility model.
As shown in Figure 1 to Figure 3, embodiment of the present utility model provides a kind of engine piston, including：
Top land 1, piston crown 2 and the piston skirt 3 being sequentially connected；
Wherein, engine piston is parts reciprocating in automobile engine cylinder cylinder body.Top land 1 is composition
The major part of combustion chamber, its shape are relevant with selected combustion-chamber shape.Specifically, gasoline engine uses flat-head piston more,
Its advantage is that endotherm area is small.The main function of engine piston is subject to the combustion pressure in cylinder, and this power is passed through into work
Plug pin and connecting rod are transmitted to bent axle.
Top land 1 is the part of combustion chamber, thus different shapes is often made, and piston of gasoline engine is at most using flat
Top or concave crown, to make chamber structure compact, area of dissipation is small, and manufacturing process is simple.
Wherein, top land is piston crown 2 below 1, and the part below the piston ring groove of piston crown 2 is piston skirt
3.The effect of piston skirt 3 is to guide piston reciprocating in the cylinder and bear lateral pressure.When engine works, because in cylinder
The effect of gas pressure, piston can produce flexural deformation, and after piston is heated, because the metal at piston pin is more, therefore it expands
Amount is more than other everywhere.
Specifically, in embodiment of the present utility model, top land 1, which is provided with, multiple keeps away valve pool 4；
Under normal circumstances, to improve piston compression ratio, piston compression height, therefore piston-top surface rising need to be improved, with gas
Door movement clearance reduces, and causes to produce piston and valve collision problem in engine operation process；Therefore, reality of the present utility model
Apply in example, top land 1 set it is multiple be used to avoiding valve keep away valve pool 4；When top land 1 and valve close to when, valve
Presence due to keeping away valve pool 4 is difficult to produce collision with top land 1, is avoided because of collision, causing to keep away the position of valve pool 4 turns into office
Portion's focus, causes combustion knock, and severe patient even results in engine piston rupture.
Piston crown 2 is provided with annular groove, and multiple through holes 5 for leading to engine piston inner chamber by annular groove are provided with annular groove；
Specifically, piston crown 2 is provided with the annular groove for ring installation, and piston ring is used to prevent high temperature, high compression ignition
Has channeling enters crankcase, while prevents machine oil from scurrying into combustion chamber；The heat that top land 1 is absorbed largely will also pass through piston head
Portion 2 is transmitted to cylinder, and then passes by cooling medium.
Piston crown 2 is generally machined with the annular groove of multiple tracks ring installation, and piston number of rings depends on the requirement of sealing, with hair
The rotating speed of motivation is relevant with cylinder pressure.
Preferably, in specific embodiment of the utility model, annular groove includes oil ring groove 6 and compression 7；
Through hole 5 is arranged on oil ring groove 6.
Wherein, through hole 5 passes to piston cavity by annular groove；During engine works, the cooling nozzles of piston can be to
Piston cavity sprays cooling machine oil；Due to the presence of through hole 5, cooling machine oil can be flowed out to oil ring groove 6 by inner chamber, on the one hand to piston
Cooling effect is played in skirt section 3, on the one hand plays lubrication to oil ring groove 6.
As a specific example, referring to Fig. 3, on the engine piston profile shown in Fig. 3, twice compression is provided with
7 with together with oil ring groove 6；Wherein, engine piston total height is 53.4 millimeters, and compressible height is 32.9 millimeters, top land
Thickness is 5.5 millimeters, and top land combustion-chamber depth is 1.4 millimeters, and (top land is between first of annular groove for firepower bank height
Push up bank height) it is 5.8 millimeters；The width of top compression ring groove 7 is 1.2 millimeters, and the bank of top compression ring groove 7 is highly 5 millimeters, second
The width of road compression 7 is 1.2 millimeters, and the bank of second gas ring groove 7 is highly 2.8 millimeters, and the width of oil ring groove 6 is 2 millimeters.
Alternatively, oilhole radius is 2.5 millimeters.
Preferably, in specific embodiment of the utility model, keeping away valve pool 4 includes the of the exhaust side positioned at top land 1
One keep away the air inlet side of valve pool 9 and top land 1 second keep away valve pool 10.
Wherein, first valve pool 9 is kept away, the second bottom surface for keeping away valve pool 10 is fan-shaped and first keeps away valve pool 9, second keeps away valve pool 10
Curved edge at cell wall use inclined design, to increase avoiding space, while eliminate hot localised points, reduce risk for knock.
Because the second of air inlet side keeps away the edge of valve pool 10 and firepower bank apart from small, focus is easily formed, therefore, second keeps away the depth of valve pool 10
The depth that degree should keep away valve pool 9 than first is deep.
As a specific example, the second of air inlet side to keep away the depth of valve pool 10 can be 4.2 millimeters, edge and piston pin hole 8
Distance between center line be 38 millimeters, radius be 18 millimeters, angle be 22 degree；
The first of exhaust side keeps away the depth of valve pool 9 as 2.1 millimeters, and edge is 39.4 millimeters with the distance between center line of piston pin hole 8,
Radius is 16 millimeters, and angle is 22 degree.
Preferably, piston skirt 3 is provided with pin-and-hole 8；
Pin-and-hole 8 is noncircular pin hole 8.
Wherein, noncircular pin hole 8 includes slotted eye, interior taper pin-hole 8 etc.；Noncircular pin hole 8 can effectively reduce frictional work loss.
Preferably, the offset at the center of pin-and-hole 8 and the center of engine piston is 0.8 millimeter.
Referring to Fig. 3, O points (point that two dotted lines intersect on the position of pin-and-hole 8 is O points) are the center of pin-and-hole 8, and straight line L is hair
Straight line where the center of motivation piston；O points are 0.8 millimeter apart from the centre distance of engine piston.
Alternatively, the friction of piston can be reduced, by reducing the area of piston skirt 3 to reduce frictional work loss.
Engine piston provided by the utility model, valve pool 4 is kept away by being set in top land 1, when top land 1 and gas
When door is close, presence of the valve due to keeping away valve pool 4 is difficult to produce collision with top land 1, therefore can effectively be avoided because collision is produced
Heat amount, causing to keep away the position of valve pool 4 turns into hot localised points, and severe patient even results in engine piston rupture；And keep away valve pool 4
Curved edge at cell wall use inclined design, to increase avoiding space, reduce risk for knock；The oil ring groove 6 of piston crown 2
The through hole 5 for leading to internal diameter is provided with, cooling machine oil can be made to flow out to oil ring groove 6 by inner chamber, on the one hand piston skirt 3 is played
Cooling effect, lubrication on the one hand is played to oil ring groove 6.The utility model solves engine piston because on piston-top surface
Rise, reduce with valve motion gap, cause to produce the problem of piston collides with valve in engine operation process.
To achieve these goals, embodiment of the present utility model additionally provides a kind of engine, including above-mentioned engine
Piston.
It should be understood that in the description of specification, the reference term " specific embodiment " mentioned, " at least one embodiment " or
It is of the present utility model at least one that " some embodiments " means that the special characteristic relevant with embodiment, structure or characteristic are included in
In embodiment or example.Therefore, " in one embodiment " that occurs everywhere in entire disclosure, " in one embodiment " or
" in certain embodiments " identical embodiment is not necessarily referred to.In addition, these specific feature, structure or characteristics can be any
Suitable mode combines in one or more embodiments.
In addition, in one or more embodiments herein, such as " comprising " or "comprising" are used to illustrate to exist to enumerate
Feature or component, but do not exclude the presence of one or more of the other feature enumerated or one or more of the other component.
In addition, in utility model embodiment, such as first and second or the like relational terms are used merely to one
Entity or operation make a distinction with another entity or operation, and not necessarily require or imply between these entities or operation
Any this actual relation or order be present.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
Calmly ", the term such as " setting " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；
Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be with
It is connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art, may be used
To understand concrete meaning of the above-mentioned term in the utility model as the case may be.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of principle described in the utility model is not departed from, some improvements and modifications can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (6)
- A kind of 1. engine piston, it is characterised in that including：Top land, piston crown and the piston skirt being sequentially connected；Wherein,The top land, which is provided with, multiple keeps away valve pool；The piston crown is provided with annular groove, is provided with and multiple is led to by the annular groove in the engine piston on the annular groove The through hole of chamber.
- 2. engine piston according to claim 1, it is characterised in that the annular groove includes oil ring groove and compression；The through hole is arranged on the oil ring groove.
- 3. engine piston according to claim 1, it is characterised in that the valve pool of keeping away includes being located at the top land The first air inlet side for keeping away valve pool and the top land of exhaust side second keep away valve pool.
- 4. engine piston according to claim 1, it is characterised in that the piston skirt is provided with pin-and-hole；The pin-and-hole is noncircular pin hole.
- 5. engine piston according to claim 4, it is characterised in that the center of the pin-and-hole and the engine piston Center offset be 0.8 millimeter.
- A kind of 6. engine, it is characterised in that including：Engine piston as any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720464115.5U CN206972392U (en) | 2017-04-28 | 2017-04-28 | A kind of engine piston and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720464115.5U CN206972392U (en) | 2017-04-28 | 2017-04-28 | A kind of engine piston and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206972392U true CN206972392U (en) | 2018-02-06 |
Family
ID=61411779
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720464115.5U Active CN206972392U (en) | 2017-04-28 | 2017-04-28 | A kind of engine piston and engine |
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| Country | Link |
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| CN (1) | CN206972392U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757152A (en) * | 2018-08-07 | 2018-11-06 | 奇瑞汽车股份有限公司 | A kind of in-cylinder direct-jet supercharging gasoline engine combustion system |
-
2017
- 2017-04-28 CN CN201720464115.5U patent/CN206972392U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757152A (en) * | 2018-08-07 | 2018-11-06 | 奇瑞汽车股份有限公司 | A kind of in-cylinder direct-jet supercharging gasoline engine combustion system |
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