CN203308598U - Combustion engine piston with surface texture shape - Google Patents
Combustion engine piston with surface texture shape Download PDFInfo
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- CN203308598U CN203308598U CN2013203361125U CN201320336112U CN203308598U CN 203308598 U CN203308598 U CN 203308598U CN 2013203361125 U CN2013203361125 U CN 2013203361125U CN 201320336112 U CN201320336112 U CN 201320336112U CN 203308598 U CN203308598 U CN 203308598U
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- groove
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- surface texture
- skirt
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Abstract
The utility model relates to a combustion engine piston with a surface texture shape, which can be applied to various combustion engines, for example, a gasoline engine and a diesel engine. The combustion engine piston is characterized in that the surface texture shapes with variable depths, variable widths and variable pitches are annularly machined on the surface of the skirt section of the combustion engine piston line by line; the surface texture shapes include a groove shape, a shape with a through hole punched inside the groove, and a shape with a row of grooves and a row of through holes; the surface texture shapes account for 5-20% of the bearing area of the skirt section of the piston; the depths of the surface texture shapes are 40% smaller than the thickness of the skirt section of the piston. The macro texture shapes (5) are machined on the surface of the skirt section (6) of the piston in order that firstly, concentrated stress of the skirt section of the piston is unloaded; secondly, low-end deformation of the skirt section of the piston is reduced; thirdly, lubricating oil and abrasive dust can be stored via the texture shapes, so that the lubricating oil can be fully supplied and evenly distributed when the piston carries out reciprocating motion inside a cylinder sleeve. Thus, the friction heat is dispersed; a lubricating effect is improved; the frictional resistance is reduced; scuffing and knocking of a cylinder are prevented; the service lives of the piston and the cylinder are prolonged.
Description
Technical field
A kind of drag reduction of belt surface textured finish, wear-resisting internal combustion engine, can be applicable in various internal-combustion engines as petrol engine, diesel engine.
Background technique
The First automobile was born so far in the world from 1886, automobile become requisitely in people's daily life ride instead of walk, traffic, means of transportation.Motor is the power source of automobile, and nowadays motor is put development to high rotating speed, high-power, low oil consumption and float.Through multinomial studies have shown that in the engine combustion energy, have 10%～20% to consume in mechanical loss, and 45%～65% energy consumption is arranged in mechanical loss in the friction pair of piston, piston ring and cylinder, therefore the engine research emphasis more, reducing piston friction power, improving the outer surface of piston wear-resisting property and improve on the piston anti-fatigue effect.And lubricant film has directly affected lubricated, the frictional behaviour of piston evenly the arranging of surface, piston skirt.So the formation of lubricant film and arranging is to improve engine performance, reduce one of important step of the energy loss in engine working process.
Summary of the invention
The purpose of this utility model be to reduce internal-combustion engine in piston and cylinder sleeve acting process because of fricative mechanical power loss, a kind of internal combustion engine of belt surface textured finish is provided.By changing the mode of piston skirt configuration of surface, unloading piston skirt concentrated stress, reduce piston skirt low side amount of deformation, makes simultaneously that lubricant film is uniformly distributed in the piston movement process, fuel feeding is abundant, reaches drag reduction, wear-resisting purpose.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions, and accompanying drawings is as follows:
A kind of drag reduction of belt surface textured finish, wear-resisting internal combustion engine, be comprised of piston head, piston ring groove, piston skirt, piston pin hole.Be characterized in processing line by line with ring form in the internal combustion engine skirt surface macro surface textured finish of degree of deepening, Trapezoidal, change spacing.
Described Surface Texture form is in groove type, groove gets through hole shape, groove delegation of delegation through hole shape; Groove type textured finish cross section is rectangular, del or semicircle.The Surface Texture form accounts for 5～20% of piston skirt bearing area, and the degree of depth is less than 40% of piston skirt thickness.
Described degree of deepening refers to that the deep trouth groove depth of groove is 35～40% of piston skirt thickness, and the shallow slot of groove is 70～80% of deep trouth groove depth deeply;
Described Trapezoidal refer to the sipes groove width of groove be the piston skirt skirt long 2.4～3%, the narrowest groove width of groove is 70～80% of sipes groove width;
Described change spacing refers to that the maximum pitch of grooves of groove is 13～15% of piston skirt skirt length, and the minigroove spacing is 40～50% of maximum pitch of grooves;
Described groove type Surface Texture form arragement direction is in turn row from piston top to bottom and arranges; In described groove, get through hole shape Surface Texture form arragement direction groove and from piston top to bottom, be in turn row and arrange, through hole is distributed in groove; Groove delegation of described delegation through hole shape Surface Texture form arragement direction in turn is row to bottom with the form of groove delegation of delegation through hole from piston top and arranges.
Described Surface Texture form is whole or local being distributed as of skirt section.
Described groove type Surface Texture form, groove depth is arranged for degree of deepening, darker apart from the groove that piston head is nearer, groove width is that Trapezoidal is arranged, wider apart from the groove that piston head is nearer, pitch of grooves is arranged for becoming spacing, and the pitch of grooves nearer apart from piston head is larger; In described groove, get through hole shape Surface Texture form, groove depth is arranged for degree of deepening, darker apart from the groove that piston head is nearer, groove width is that Trapezoidal is arranged, wider apart from the groove that piston head is nearer, pitch of grooves is arranged for becoming spacing, and the pitch of grooves nearer apart from piston head is larger, and through hole processing is equidistantly evenly arranged in groove and diameter equals its place recess width; Groove delegation of described delegation through hole shape Surface Texture form, groove depth is arranged for degree of deepening, darker apart from the groove that piston head is nearer, groove width is that Trapezoidal is arranged, wider apart from the groove that piston head is nearer, capable and the through hole line space of groove is arranged for becoming spacing, and the groove nearer apart from piston head is capable and the through hole line space is larger.
Described groove type Surface Texture form, deep trouth groove depth is 35～40% of piston skirt thickness, sipes groove width be the piston skirt skirt long 2.4～3%, maximum pitch of grooves is 13～15% of piston skirt skirt length, shallow slot is 70～80% of deep trouth groove depth deeply, the narrowest groove width is 70～80% of sipes groove width, and the minigroove spacing is 40～50% of maximum pitch of grooves; In described groove, get through hole shape Surface Texture form, deep trouth groove depth is 35～40% of piston skirt thickness, sipes groove width be the piston skirt skirt long 2.4～3%, maximum pitch of grooves is 13～15% of piston skirt skirt length, shallow slot is 70～80% of deep trouth groove depth deeply, the narrowest groove width is 70～80% of sipes groove width, and the minigroove spacing is 40～50% of maximum pitch of grooves, and through-hole diameter is equal to the place recess width; Groove delegation of described delegation through hole shape Surface Texture form, deep trouth groove depth is 35～40% of piston skirt thickness, sipes groove width be the piston skirt skirt long 2.4～3%, capable and the through hole line space of maximum groove be the piston skirt skirt long 13～15%, shallow slot is 70～80% of deep trouth groove depth deeply, the narrowest groove width is 70～80% of sipes groove width, capable and the through hole line space of minimum groove is 40～50% of the capable and through hole line space of maximum groove, and through-hole diameter is equal to the width apart from its nearest groove in top.Through hole is arranged and is accounted for and 3～6% of its diameter equal-width groove area.
The utility model is a kind of internal combustion engine of belt surface texture shape, can be applicable in various internal-combustion engines as petrol engine, diesel engine.Its usage mode, method are with the common standard piston, and without the Special use requirement, concrete size is adjusted according to the piston skirt size.
Technique effect of the present utility model is:
The utility model can be applicable in various internal-combustion engines as petrol engine, diesel engine.
Due to lubricant film, evenly the arranging of surface, piston skirt, directly affected lubricated, the frictional behaviour of piston.Internal combustion engine in the utility model, textured finish can be stored lubricant oil and abrasive dust, make piston in cylinder sleeve in the to-and-fro motion process lubricant oil can supply with fully, be evenly distributed.Thereby Decentralized Friction heat, improve lubrication effect, reduces surface friction drag, prevents scuffing of cylinder bore and engine knock, extends the working life of piston and cylinder.
Machined grooves, pit and through hole improved the piston of lubricating status on internal combustion engine in the past, did not all consider the stress of piston skirt non-uniform Distribution, thus the groove of designing, pit and through hole be all evenly arrange and size unified.The utility model finds that by test and finite element analysis piston head the 3rd annular groove spill port place, road is subjected to the stress maximum, and fatigue fracture very easily occurs.And in the utility model, texture surface has the effect that unloads stress, therefore dark width variety textured finish is machined in to the upper end, piston skirt, location of maximum stress is moved down.The while textured finish degree of depth and width, especially the appropriate design of large spacing dimension between the textured finish of top, skirt section, extended the fatigue life of piston skirt.
Internal combustion engine except in cylinder, moving reciprocatingly simultaneously radially there being second order to swing, is the piston skirt low side so be out of shape maximum position in the course of the work.The evenly design of groove, pit and the through hole of processing in piston skirt in the past, not under the circumstances.The little spacing design of the utility model between the shallow narrow class textured finish of piston skirt low side processing and textured finish, reduce the amount of deformation of piston skirt low side greatly, effectively prevented the generation of scuffing of cylinder bore, detonation phenomenon, extended the working life of piston and cylinder.
The accompanying drawing explanation
Fig. 1 (a1) is piston structure schematic diagram of the present utility model, and Fig. 1 (a2) is for take the groove numbering figure of rectangular recess as example;
Fig. 1 (b1), (b2), (b3) they are the utility model piston face textured finish schematic diagram, wherein:
(b1) being that piston skirt Surface Texture form is groove type, is (b2) that piston skirt Surface Texture form is in groove and gets through hole shape, is (b3) that piston skirt Surface Texture form is groove delegation of delegation through hole shape;
Fig. 1 (c1), (c2), (c3) take rectangle groove to be the example textured finish sectional view of corresponding diagram 1 (b1), (b2), (b3) respectively;
Fig. 1 (d1), (d2) are other two kinds of section forms (del, semicircle) of groove type texture;
Fig. 2 is through-hole surfaces textured finish distribution mode (by the rectangular distribution) schematic diagram;
Fig. 3 (a) be take rectangle groove Surface Texture form as the groove type Surface Texture form degree of depth, width, spacing, the skirt of example are long, the thick schematic diagram of skirt;
Fig. 3 (b) gets through in groove that the hole shape Surface Texture form degree of depth, width, spacing, through-hole diameter, skirt are long, the thick schematic diagram of skirt;
Fig. 3 (c) is that groove delegation of the delegation through hole shape Surface Texture form degree of depth, width, spacing, through-hole diameter, skirt are long, the thick schematic diagram of skirt;
In figure: 1, Surface Texture form 6, piston skirt 7, the pin-and-hole 5 of piston head 2, compression 3, oil ring groove 4, spill port 5, processing
1-5
8, textured finish numbering;
T, the thick h of skirt, groove depth s, pitch of grooves w, well width d, through-hole diameter 1, skirt are long
Embodiment
Below accepting the accompanying drawing example illustrated describes embodiment of the present utility model.
A kind of skirt section is with the internal combustion engine of Surface Texture form, and surface Machining goes out textured finish in piston skirt.This form is in groove type, groove gets through hole shape, groove delegation of delegation through hole shape; Groove type textured finish cross section is rectangular, del or semicircle.The Surface Texture form accounts for 5～20% of piston skirt bearing area, and the degree of depth is less than 40% of piston skirt thickness.
Skirt section is with the texture of the internal combustion engine of the Surface Texture form characteristics of arranging: groove type Surface Texture form, groove depth is arranged for degree of deepening, darker apart from the groove that piston head is nearer, groove width is that Trapezoidal is arranged, wider apart from the groove that piston head is nearer, pitch of grooves is arranged for becoming spacing, and the pitch of grooves nearer apart from piston head is larger; In groove, get through hole shape Surface Texture form, groove depth is arranged for degree of deepening, darker apart from the groove that piston head is nearer, groove width is that Trapezoidal is arranged, wider apart from the groove that piston head is nearer, pitch of grooves is arranged for becoming spacing, and the pitch of grooves nearer apart from piston head is larger, and through hole processing is equidistantly evenly arranged in groove and diameter equals its place recess width; Groove delegation of delegation through hole shape Surface Texture form, groove depth is arranged for degree of deepening, darker apart from the groove that piston head is nearer, groove width is that Trapezoidal is arranged, wider apart from the groove that piston head is nearer, capable and the through hole line space of groove is arranged for becoming spacing, and the groove nearer apart from piston head is capable and the through hole line space is larger.Through hole is arranged and is accounted for and 3～6% of its diameter equal-width groove area.Textured finish also can only be present in part.
Described groove type Surface Texture form, deep trouth groove depth is 35～40% of piston skirt thickness, sipes groove width be the piston skirt skirt long 2.4～3%, maximum pitch of grooves is 13～15% of piston skirt skirt length, shallow slot is 70～80% of deep trouth groove depth deeply, the narrowest groove width is 70～80% of sipes groove width, and the minigroove spacing is 40～50% of maximum pitch of grooves;
In described groove, get through hole shape Surface Texture form, deep trouth groove depth is 35～40% of piston skirt thickness, sipes groove width be the piston skirt skirt long 2.4～3%, maximum pitch of grooves is 13～15% of piston skirt skirt length, shallow slot is 70～80% of deep trouth groove depth deeply, the narrowest groove width is 70～80% of sipes groove width, and the minigroove spacing is 40～50% of maximum pitch of grooves, and through-hole diameter is equal to the place recess width;
Groove delegation of described delegation through hole shape Surface Texture form, deep trouth groove depth is 35～40% of piston skirt thickness, sipes groove width be the piston skirt skirt long 2.4～3%, capable and the through hole line space of maximum groove be the piston skirt skirt long 13～15%, shallow slot is 70～80% of deep trouth groove depth deeply, the narrowest groove width is 70～80% of sipes groove width, capable and the through hole line space of minimum groove is 40～50% of the capable and through hole line space of maximum groove, and through-hole diameter is equal to the width apart from its nearest groove in top.Through hole is arranged and is accounted for and 3～6% of its diameter equal-width groove area.
The utility model is a kind of internal combustion engine of belt surface texture shape, can be applicable in various internal-combustion engines as petrol engine, diesel engine.Its usage mode, method are with the common standard piston, and without the Special use requirement, concrete size is adjusted according to the piston skirt size.
Characteristics of the present utility model are the lip-deep textured finish in piston skirt.The Jetta x1-2v motor car engine of take is example, (6) upper finished surface textured finish in piston skirt, textured finish the piston skirt distribution area account for skirt surface long-pending 5～20%, the degree of depth is less than 40% of piston skirt thickness, its groove or through hole distribute can consult Fig. 1, Fig. 2.In the real train test of automobile, due to the internal combustion engine with the Surface Texture form, at first can unload the piston skirt concentrated stress; Next is to reduce piston skirt low side amount of deformation; That textured finish can be stored lubricant oil and abrasive dust again, make piston in cylinder sleeve in the to-and-fro motion process lubricant oil can supply with fully, be evenly distributed.Thereby Decentralized Friction heat, improve lubrication effect, reduces surface friction drag, prevents scuffing of cylinder bore and engine knock, extends the working life of piston and cylinder.The disclosed piston of the utility model is in usage mode, method with the common standard piston, and without the Special use requirement, and the internal-combustion engine used can drag reduction, wear-resisting, improves mechanical efficiency.
Consult Fig. 1, according to internal-combustion engine model difference, its Surface Texture arrangement mode can suitably be adjusted, but needs to guarantee that the shared piston skirt of textured finish surface area is in 5～20% scopes, and the degree of depth is less than 40% of piston skirt thickness.
In key lab of the bionical ministry of education of Jilin University's engineering, built motor car engine cold test platform, the piston in the utility model has been carried out to stand test, to investigate using effect of the present utility model.Data are as follows:
The durability wear test is carried out on the x1-2v motor car engine; Piston external diameter: 80.985mm; Skirt section thickness: 2.4mm; Skirt section length: 35.16mm; Piston material: aluminum alloy; Test period: 500 hours; Nominal power 80kW/6000r/min; Test room temperature: 20 ° of C.
Under same test conditions, consider the error of each disassembling and assembling engine, in four cylinders in each test, put into three and test with Surface Texture form piston and a standard piston.According to the condition of the size situation of x1-2v piston of automobile engine and processing textured finish, the rectangular recess of take is the piston of example processing with the Surface Texture form, and at piston skirt processing 8 row rectangular recess, and adjacent two row grooves (are in Fig. 1 (a2) 5
1With 5
2, 5
3With 5
4, 5
5With 5
6, 5
7With 5
8) groove depth, groove width equate.Topmost apart from 24.5mm, pitch of grooves is followed successively by 4.25,3.88,3.5,3.13,2.75,2.38 to the groove radial centre lines from top to bottom to piston head, 2mm.Through hole divides 6 row evenly to arrange.With Surface Texture form piston test scheme, refer to table 1-3.
Table 1 is with Surface Texture form piston skirt depth of groove (degree of depth h, mm)
Table 2 with Surface Texture form piston skirt depth of groove and join slot aperture (width w, diameter d, mm)
Table 3 has Surface Texture form piston test scheme
Wear extent detects by before and after test, piston being weighed and obtained, and peak output is by detecting each cylinder in test initial stage and latter stage.Test result, refer to table 4-6.
First group of piston test result of table 4
Second group of piston test result of table 5
By comparative test result, draw, the utility model can make that piston wear amount decreased average 35%, power are maximum improves 1%, thereby improves lubrication effect between piston and cylinder sleeve, reduces surface friction drag, extends engine life.
Claims (6)
1. the internal combustion engine with the Surface Texture form, be comprised of piston head, piston ring groove, piston skirt, piston pin hole, and its characteristics are:
On the surface, piston skirt, process line by line the macro surface textured finish of degree of deepening, Trapezoidal, change spacing with ring form; Described Surface Texture form is in groove type, groove gets through hole shape, groove delegation of delegation through hole shape; Groove type textured finish cross section is rectangular, del or semicircle; The Surface Texture form accounts for 5～20% of piston skirt bearing area, and the degree of depth is less than 40% of piston skirt thickness.
2. a kind of internal combustion engine with the Surface Texture form according to claim 1 is characterized in that:
Described degree of deepening refers to that the deep trouth groove depth of groove is 35～40% of piston skirt thickness, and the shallow slot of groove is 70～80% of deep trouth groove depth deeply;
Described Trapezoidal refer to the sipes groove width of groove be the piston skirt skirt long 2.4～3%, the narrowest groove width of groove is 70～80% of sipes groove width;
Described change spacing refers to that the maximum pitch of grooves of groove is 13～15% of piston skirt skirt length, and the minigroove spacing is 40～50% of maximum pitch of grooves.
3. a kind of internal combustion engine with the Surface Texture form according to claim 1 and 2 is characterized in that:
In described groove, get through hole shape Surface Texture form, through-hole diameter is equal to the place recess width;
Groove delegation of described delegation through hole shape Surface Texture form, through-hole diameter is equal to the width apart from its nearest groove in top, and through hole is arranged and is accounted for and 3～6% of its diameter equal-width groove area;
Described Surface Texture form is whole or local being distributed as of skirt section.
4. according to the described a kind of internal combustion engine with the Surface Texture form of claim 1 to 2 any one, it is characterized in that:
Described groove type Surface Texture form, groove depth is arranged for degree of deepening, darker apart from the groove that piston head is nearer, groove width is that Trapezoidal is arranged, wider apart from the groove that piston head is nearer, pitch of grooves is arranged for becoming spacing, and the pitch of grooves nearer apart from piston head is larger.
5. according to the described a kind of internal combustion engine with the Surface Texture form of claim 1 to 2 any one, it is characterized in that:
In described groove, get through hole shape Surface Texture form, groove depth is arranged for degree of deepening, darker apart from the groove that piston head is nearer, groove width is that Trapezoidal is arranged, wider apart from the groove that piston head is nearer, pitch of grooves is arranged for becoming spacing, and the pitch of grooves nearer apart from piston head is larger, and through hole processing is equidistantly evenly arranged in groove and diameter equals its place recess width.
6. according to the described a kind of internal combustion engine with the Surface Texture form of claim 1 to 2 any one, it is characterized in that:
Groove delegation of described delegation through hole shape Surface Texture form, groove depth is arranged for degree of deepening, darker apart from the groove that piston head is nearer, groove width is that Trapezoidal is arranged, wider apart from the groove that piston head is nearer, capable and the through hole line space of groove is arranged for becoming spacing, and the groove nearer apart from piston head is capable and the through hole line space is larger, and through hole is arranged and accounted for and 3～6% of its diameter equal-width groove area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203361125U CN203308598U (en) | 2013-06-10 | 2013-06-10 | Combustion engine piston with surface texture shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203361125U CN203308598U (en) | 2013-06-10 | 2013-06-10 | Combustion engine piston with surface texture shape |
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| Publication Number | Publication Date |
|---|---|
| CN203308598U true CN203308598U (en) | 2013-11-27 |
Family
ID=49614812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203361125U Withdrawn - After Issue CN203308598U (en) | 2013-06-10 | 2013-06-10 | Combustion engine piston with surface texture shape |
Country Status (1)
| Country | Link |
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| CN (1) | CN203308598U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410626A (en) * | 2013-06-10 | 2013-11-27 | 吉林大学 | Internal combustion engine piston with surface texture forms |
| CN106677917A (en) * | 2017-03-08 | 2017-05-17 | 长春工程学院 | Engine piston capable of saving energy and prolonging service life |
-
2013
- 2013-06-10 CN CN2013203361125U patent/CN203308598U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410626A (en) * | 2013-06-10 | 2013-11-27 | 吉林大学 | Internal combustion engine piston with surface texture forms |
| CN103410626B (en) * | 2013-06-10 | 2015-04-22 | 吉林大学 | Internal combustion engine piston with surface texture forms |
| CN106677917A (en) * | 2017-03-08 | 2017-05-17 | 长春工程学院 | Engine piston capable of saving energy and prolonging service life |
| CN106677917B (en) * | 2017-03-08 | 2022-11-15 | 长春工程学院 | Energy-saving and life-prolonging engine piston |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131127 Effective date of abandoning: 20150422 |