CN208010474U - Boss structure of bolt hole of engine cylinder cover - Google Patents
Boss structure of bolt hole of engine cylinder cover Download PDFInfo
- Publication number
- CN208010474U CN208010474U CN201820117488.XU CN201820117488U CN208010474U CN 208010474 U CN208010474 U CN 208010474U CN 201820117488 U CN201820117488 U CN 201820117488U CN 208010474 U CN208010474 U CN 208010474U
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- CN
- China
- Prior art keywords
- cylinder
- boss
- bolt
- bolt hole
- cylinder cover
- Prior art date
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- 230000008450 motivation Effects 0.000 claims 1
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 10
- 238000005336 cracking Methods 0.000 abstract 1
- 238000004880 explosion Methods 0.000 description 6
- 239000000956 alloy Substances 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 229910001060 Gray iron Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010016256 fatigue Diseases 0.000 description 2
- 239000013590 bulk material Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses an engine cylinder lid bolt hole boss structure has: a cylinder head body; the four sides of each cylinder of the cylinder cover body are uniformly provided with four cylinder cover bolt holes; the upper end of the cylinder cover bolt hole is provided with a cylinder cover bolt boss which is contacted with the end face of the cylinder cover bolt; the cylinder cover bolt boss is an arc boss, the bottom of the arc boss is connected to the wall surface of the cylinder cover oil pool, the structure of the periphery of the cylinder cover bolt hole is optimized, the risk of crushing or cracking of the cylinder body is avoided, and the application of the aluminum alloy cylinder cover on the high-explosion-pressure diesel engine is realized.
Description
Technical field
The utility model belongs to technical field of automobile engine more particularly to a kind of engine cylinder cover bolt hole boss knot
Structure.
Background technology
Under normal circumstances, since diesel engine performance ratio gasoline is high, and combustion process is more severe.So to engine
The intensity of bulk material, rigidity requirement are higher.The material of diesel engine cylinder cover is mostly grey cast-iron, for the bavin of very-high performance
Oil turbine cylinder cap also has the application of vermicular cast iron.But as national legislation is higher and higher to the oil consumption of vehicle and emission request,
Leading to vehicle, more stringent requirements are proposed to the weight of engine, the thermal efficiency.In order to achieve the purpose that loss of weight reduces oil consumption, diesel oil
The application of engine aluminum alloy cylinder cover is also more and more extensive.
The density of aluminum alloy materials only have grey cast-iron, vermicular cast iron 1/3, but mechanical performance will be less than grey cast-iron
And vermicular cast iron.For application of the cylinder cap on high-performance diesel engine of aluminum alloy materials, in addition to increase specific alloy at
Divide outside the mechanical property to provide aluminum alloy cylinder cover, the structure design of cylinder cap is also particularly important.
Select diameter small as far as possible for the compactedness and increase water jacket circulation area, cylinder bolt of engine design,
So under identical explosion pressure, the strength grade of cylinder bolt will improve, and generally be 12.9 grades or more.High intensity etc.
Grade the corresponding bolt pretightening of cylinder bolt just improve, this requires the design of cylinder bolt hole boss need sufficient intensity and
Support.Otherwise there are conquassation and the low risk of fatigue safety factor.
Scheme more commonly used at present is to be embedded in the supporting rack of a high-strength alloy in cast aluminium alloy gold cylinder cap；
Another scheme is exactly to be processed into threaded hole, then embedded alloy bushing in cylinder bolt hole.Both the above scheme all has
Effect improves the scheme of cylinder bolt hole boss intensity.But cost is relatively high, craftsmanship is also more complicated.
Utility model content
Structure optimization is carried out to cylinder bolt hole periphery the technical problem to be solved by the utility model is to provide a kind of, is kept away
Exempt from the risk that ontology is crushed or is cracked, realizes the engine cylinder cover of application of the aluminum alloy cylinder cover on high explosion pressure diesel engine
Bolt hole boss structure.
In order to solve the above-mentioned technical problem, technical solution used by the utility model is：A kind of engine cylinder bonnet bolt
Hole boss structure, has：
Cylinder cap ontology；
Each cylinder surrounding of cylinder bolt hole, the cylinder cap ontology is evenly arranged four cylinder bolt holes；
The upper end of cylinder bolt boss, the cylinder bolt hole is cylinder bolt boss, the cylinder bolt boss and cylinder
Bonnet bolt end face contacts；The cylinder bolt boss is circular arc boss, and the bottom of circular arc boss is connected to cylinder cap oil sump wall surface.
The engine is four cylinder engine, is equipped with 10 cylinder bolt holes altogether on cylinder cap ontology, intake and exhaust side respectively has 5
Cylinder bolt hole.
The cylinder bolt boss is more than cylinder bolt flange face.
The bottom of the circular arc boss is connected to cylinder cap oil sump wall surface by fillet.
A technical solution in above-mentioned technical proposal has the following advantages that or advantageous effect, and cylinder bolt hole periphery carries out
Structure optimization, the risk for avoiding ontology from being crushed or cracked.Realize application of the aluminum alloy cylinder cover on high explosion pressure diesel engine.
Increase beveled structure on cylinder bolt hole periphery, to increase the forced area of cylinder cap ontology, to decompose the cylinder bolt of superelevation
Pretightning force, to play protection cylinder cap ontology purpose.
Description of the drawings
Fig. 1 is the structural schematic diagram of the engine cylinder cover bolt hole boss structure provided in the utility model embodiment；
Fig. 2 is the structural schematic diagram of the engine cylinder cover bolt hole boss structure of Fig. 1；
Fig. 3 is the sectional view of the engine cylinder cover bolt hole boss structure of Fig. 1；
Label in above-mentioned figure is：1, cylinder bolt hole, 2, cylinder bolt boss, 3, circular arc boss, 4, cylinder cap oil sump
Wall surface.
Specific implementation mode
It is new to this practicality below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Referring to Fig. 1-3, a kind of engine cylinder cover bolt hole boss structure has：
Cylinder cap ontology；
Each cylinder surrounding of cylinder bolt hole, cylinder cap ontology is evenly arranged four cylinder bolt holes；
The upper end of cylinder bolt boss, cylinder bolt hole is cylinder bolt boss, cylinder bolt boss and cylinder bolt end
Face contacts；Cylinder bolt boss is circular arc boss, and the bottom of circular arc boss is connected to cylinder cap oil sump wall surface.Circular arc boss is umbrella shape
Structure.
Engine is four cylinder engine, is equipped with 10 cylinder bolt holes altogether on cylinder cap ontology, respectively there are 5 cylinder caps in intake and exhaust side
Bolt hole.
Cylinder bolt boss is more than cylinder bolt flange face.
The bottom of circular arc boss is connected to cylinder cap oil sump wall surface by fillet, is connected with cylinder cap ontology.
For in the designing and developing of high explosion pressure diesel engine aluminum alloy cylinder cap, in order to avoid cylinder cap is by bolt pretightening
Destruction, enough strength supports are provided for cylinder bolt, improve the fatigue safety factor of entire cylinder cap.Carrying out cylinder cover structure
When design, it is contemplated that be uniformly distributed a circle beveled structure around cylinder bolt hole boss, not according to valve actuating mechanism arrangement
Together, umbrella shape area is big as far as possible；
Beveled structure top surface should meet the requirement in bolt presses face, and cylinder bolt flange face is larger than in design；
Beveled structure lower edge is connected with the oil sump of cylinder cap, and the fillet of connecting portion increases as far as possible.By cylinder bolt
Explosion pressure when boss receives pretightning force and engine operation is evenly distributed in cylinder cap ontology, avoids stress concentration.
After above-mentioned structure, cylinder bolt hole periphery carries out structure optimization, the wind for avoiding ontology from being crushed or cracked
Danger.Realize application of the aluminum alloy cylinder cover on high explosion pressure diesel engine.Increase beveled structure on cylinder bolt hole periphery, to increase
The forced area of big cylinder cap ontology, to decompose superelevation cylinder bolt pretightning force, to play the mesh of protection cylinder cap ontology
's.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, as long as using the methodology of the utility model and various unsubstantialities that technical solution carries out change
Into, or it is not improved the design of the utility model and technical solution are directly applied into other occasions, in the utility model
Protection domain within.
Claims (4)
1. a kind of engine cylinder cover bolt hole boss structure, which is characterized in that have：
Cylinder cap ontology；
Each cylinder surrounding of cylinder bolt hole, the cylinder cap ontology is evenly arranged four cylinder bolt holes；
The upper end of cylinder bolt boss, the cylinder bolt hole is cylinder bolt boss, the cylinder bolt boss and cylinder cap spiral shell
Bolt end face contacts；The cylinder bolt boss is circular arc boss, and the bottom of circular arc boss is connected to cylinder cap oil sump wall surface.
2. engine cylinder cover bolt hole boss structure as described in claim 1, which is characterized in that the engine is sent out for four cylinders
Motivation is equipped with 10 cylinder bolt holes on cylinder cap ontology altogether, and respectively there are 5 cylinder bolt holes in intake and exhaust side.
3. engine cylinder cover bolt hole boss structure as claimed in claim 1 or 2, which is characterized in that the cylinder bolt is convex
Platform is more than cylinder bolt flange face.
4. engine cylinder cover bolt hole boss structure as claimed in claim 3, which is characterized in that the bottom of the circular arc boss
It is connected to cylinder cap oil sump wall surface by fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820117488.XU CN208010474U (en) | 2018-01-24 | 2018-01-24 | Boss structure of bolt hole of engine cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820117488.XU CN208010474U (en) | 2018-01-24 | 2018-01-24 | Boss structure of bolt hole of engine cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208010474U true CN208010474U (en) | 2018-10-26 |
Family
ID=63884257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820117488.XU Active CN208010474U (en) | 2018-01-24 | 2018-01-24 | Boss structure of bolt hole of engine cylinder cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208010474U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356742A (en) * | 2018-12-12 | 2019-02-19 | 中国北方发动机研究所(天津) | A kind of engine cylinder cap with oil leab |
| CN110439703A (en) * | 2019-08-30 | 2019-11-12 | 湖北玛尔帕斯动力科技有限公司 | A kind of Vermicular Iron Cylinder Head for automobile engine |
-
2018
- 2018-01-24 CN CN201820117488.XU patent/CN208010474U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356742A (en) * | 2018-12-12 | 2019-02-19 | 中国北方发动机研究所(天津) | A kind of engine cylinder cap with oil leab |
| CN110439703A (en) * | 2019-08-30 | 2019-11-12 | 湖北玛尔帕斯动力科技有限公司 | A kind of Vermicular Iron Cylinder Head for automobile engine |
| CN110439703B (en) * | 2019-08-30 | 2024-03-19 | 湖北玛尔帕斯动力科技有限公司 | Vermicular graphite cast iron cylinder cover for automobile engine |
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| GR01 | Patent grant |