CN202659370U - Ceramic armored internal combustion engine piston - Google Patents
Ceramic armored internal combustion engine piston Download PDFInfo
- Publication number
- CN202659370U CN202659370U CN2012201472152U CN201220147215U CN202659370U CN 202659370 U CN202659370 U CN 202659370U CN 2012201472152 U CN2012201472152 U CN 2012201472152U CN 201220147215 U CN201220147215 U CN 201220147215U CN 202659370 U CN202659370 U CN 202659370U
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- ceramic
- top plate
- piston
- combustion engine
- internal combustion
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a ceramic armored internal combustion engine piston. The piston comprises a metal piston and a ceramic top plate, wherein the ceramic top plate is arranged at the top end of the metal piston; a plurality of ceramic nails are uniformly distributed at the inner surface of the ceramic top plate; and the metal piston and the ceramic top plate are integrally connected through the ceramic nails. By the adoption of the internal combustion engine piston provided by the utility model, the conduction of high temperature heat of the combustion chamber of the internal combustion engine to the metal piston is reduced effectively, the ablation of the metal piston is prevented effectively, the temperature of the combustion chamber of the internal combustion engine is increased, fuels can be combusted more rapidly and safely, and the heat engine efficiency of the internal combustion engine is increased. The internal combustion engine piston of an armored ceramic covering layer provided by the utility model, is simple in manufacturing method, low in requirements on machining precision and can be realized through modern machining techniques.
Description
Technical field
The utility model relates to internal combustion engine, relates in particular to a kind of internal combustion engine at piston tip armouring silicate lining layer.
Background technique
At present internal combustion engine all is to make of metallic material, and piston temperature is too high and affect the use of piston when preventing internal combustion engine, all is provided with stronger liquid-cooling system in internal-combustion engine, works under not too high temperature with the assurance internal-combustion engine.Because liquid-cooling system heat radiator effect meeting consumes partial heat energy, so that the temperature of combustion chambers of internal combustion engines reduces, make in some cases the fuel combustion in the firing chamber get rapid, incomplete, reduced the efficiency of heat engine of internal-combustion engine, sometimes even also can produce the harmful gas of incomplete combustion, befouling environment.
The model utility content
Model utility purpose: in order to overcome the deficiencies in the prior art, the purpose of this utility model be to provide a kind of rational in infrastructure, can effectively intercept combustion chamber high temperature to the impact of metal piston body, reduce internal-combustion engine liquid cooling intensity, improve the ceramic armouring internal combustion engine that cylinder combustion is burnt the temperature of chamber.
Technological scheme: for achieving the above object, the technical solution adopted in the utility model is: a kind of ceramic armouring internal combustion engine, comprise metal body piston and ceramic top plate, described ceramic top plate is located at the top of described metal body piston, and the top of the outer surface of ceramic top plate and described metal body piston is suitable, at the even a plurality of pottery nails that distribute of the internal surface of ceramic top plate, described ceramic top plate is connected with the metal body piston by ceramic nail.
Wherein, an end and the described ceramic top plate of described pottery nail are that an integral body, the other end are embedded in the described metal body piston.Because the thermal expansion coefficient of metal is larger than the thermal expansion coefficient of ceramic body, the contraction of the contraction ratio ceramic body of metal body was large when cooling was shunk, metal body applies pressure stress to the cylindrical ceramic nail, the pottery nail is fixed in the metal body firmly, makes ceramic top plate and piston metal body connect into an integral body.Described armouring ceramic top plate piston can bear higher combustion temperature than metallic piston, its heat that transmits to metal body also still less, so that whole cylinder can not adopt or reduce liquid-cooling system, make the firing chamber of internal-combustion engine keep higher operating temperature, it is rapider, more complete that fuel combustion is got, the efficiency of heat engine of Effective Raise internal-combustion engine.
Wherein, described pottery nail is cylindric, and its diameter is 5mm～10mm, the high 5mm～10mm of being.The sectional area summation of all pottery nails accounts for ceramic top plate area 20%～30%.
The material of described ceramic top plate is any in the potteries such as silicon nitride ceramics, aluminium oxide ceramics or silicon oxide ceramics.Silicon nitride ceramics, aluminium oxide ceramics or silicon oxide ceramics all are that hardness is large, compressive strength is high, resistant to elevated temperatures stupalith; this stupalith is covered in the internal combustion engine top; can effectively protect piston; prevent the high-temperature combustion gas ablation of the burned chamber of piston; the little heat of silicate lining layer thermal conductivity is transmitted few; can effectively reduce the operating temperature of the parts such as piston, bent axle, making minimizing liquid cooling degree improve the burning room temperature becomes possibility.The utility model utilization heating casting, the fixing armouring method of pressure stress are combined into an integral body securely with silicate lining layer and metal body piston, make its function with high temperature resistant, low heat conduction of Ceramic piston, promote the practicalization of ceramic combustion engine.
Angle from the heat transmission, stupalith is the poor conductor of heat, its thermal conductivity is much smaller than metal, heat of high temperature is outwards transmitted slower by silicate lining layer in the cylinder, and metal to be the excellence conductor of heat conduct heat very fast, the heat that silicate lining layer passes to metallic piston can outwards be delivered to each metal parts rapidly and cool off, thus the raising of chamber temperature that connecting rod, bent axle etc. are heated up is too high.
The heat of cylinder fuel combustion is by the outwards minimizing of heat radiation of piston, so that the corresponding raising of the temperature in the firing chamber; Simultaneously, because the minimizing that piston outwards dispels the heat is just local in cylinder, thereby can only make the temperature in the firing chamber improve 100 ℃～200 ℃, can not produce large impact to other parts of machine.
Beneficial effect: compared with prior art, a kind of internal combustion engine at piston tip armouring silicate lining layer that the utility model provides, can reduce the heat transmission of piston, the temperature of raising combustion chamber of air cylinder, so that the burning of fuel is rapider, more complete, thus the efficiency of heat engine of increasing combustion engine; Compare with similar type, the radiation loss of piston can reduce 10%～20%, and the cylinder combustion room temperature can improve 100 ℃～200 ℃, and efficiency of heat engine can improve 5%～10%, the internal-combustion engine that especially the short distance intermittent type is used, and its effects of energy saving and emission reduction is more obvious.The manufacture method of the internal combustion engine of the armouring ceramic top plate that the utility model provides is simple, requirement on machining accuracy is not high, and Modern Manufacturing Technology can realize.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model ceramic top plate;
Fig. 3 is the left view of Fig. 2.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Embodiment 1: be illustrated in figure 1 as a kind of ceramic armouring internal combustion engine, comprise metal body piston 1 and ceramic top plate 2, ceramic top plate 2 is cast on metallized metal body piston 1 top; Ceramic top plate 2 outer surfaces and the requirement of size conforms piston tip, the shape, the size that are ceramic top plate 2 outer surfaces are identical with the top of metal body piston, at the internal surface of ceramic top plate 2 a plurality of pottery nails 3 that evenly distribute, an end of each pottery nail 3 is connected connection, the other end and is embedded in the metal body piston 1 with ceramic top plate.
Wherein, the thickness of ceramic top plate 2 is 5mm, and material is silicon nitride ceramics; Pottery nail 3 is cylindric, and its diameter is 5mm, the high 5mm of being.The sectional area summation of all pottery nails 3 accounts for ceramic top plate 2 areas 30%.
The internal combustion engine of making above-mentioned armouring ceramic top plate 2 specifically comprises the steps:
1) adopt the making processing method of industrial ceramics to make and processing ceramic top board 2, make the size conforms piston tip requirement of its outer surface and outer surface, the cylindrical ceramic nail 3 of the even distribution diameter 5mm of internal surface, high 5mm, cylindrical ceramic is followed closely 3 sectional area summations and is accounted for ceramic top plate 2 areas 30%;
2) make casting of metals sand mo(u)ld and ceramic top plate 2 is placed in one ceramic top plate center line and casting sand mo(u)ld center superposition; Place accurately the position;
3) after being heated to 900 ℃, ceramic top plate 2 or integral cast sand mo(u)ld wait for casting;
4) with molten metal from casting gate flows into casting sand mo(u)ld take ceramic top plate 2 as bed die, cooled and solidified forms metal body piston 1 to molten metal on ceramic top plate 2 surfaces and around the cylindrical ceramic nail 3, by natural cooling means, metal body will be followed closely 3 to cylindrical ceramic and produce gradually pressure stress, and ceramic top plate 2 is securely fixed in metal body piston 1 top; Obtain the composite piston foundry goods;
5) the composite piston foundry goods that casting is good is processed metal body piston 1 take ceramic top plate as benchmark again, makes its requirement that meets piston, namely obtains described internal combustion engine.
The utility model is compared with similar type, and the radiation loss of piston can reduce 10%, and the cylinder combustion room temperature can improve 100 ℃, and efficiency of heat engine can improve 5%.
Embodiment 2: substantially the same manner as Example 1, difference is the requirement of ceramic top plate 2 and pottery nail 3, and the temperature that heats in the step 3) during preparation;
Wherein ceramic top plate 2 adopts aluminium oxide ceramics, and the thickness of its ceramic top plate 2 is 8mm, and material is aluminium oxide ceramics; Pottery nail 3 is cylindric, and its diameter is 8mm, the high 8mm of being; The sectional area summation of all pottery nails 3 accounts for ceramic top plate 2 areas 20%.
The utility model is compared with similar type, and the radiation loss of piston can reduce 20%, and the cylinder combustion room temperature can improve 200 ℃, and efficiency of heat engine can improve 10%.
During preparation, in the step 3), wait to cast after ceramic top plate 2 or integral cast sand mo(u)ld be heated to 700 ℃.
Embodiment 3: substantially the same manner as Example 1, difference is the requirement of ceramic top plate 2 and pottery nail 3, and the temperature that heats in the step 3) during preparation;
Wherein ceramic top plate 2 adopts silicon oxide ceramics, and the thickness of its ceramic top plate 2 is 10mm, and material is silicon oxide ceramics.Pottery nail 3 is cylindric, and its diameter is 10mm, the high 10mm of being.The sectional area summation of all pottery nails 3 accounts for ceramic top plate 2 areas 25%.
The utility model is compared with similar type, and the radiation loss of piston can reduce 15%, and the cylinder combustion room temperature can improve 150 ℃, and efficiency of heat engine can improve 8%.
During preparation, in the step 3), wait to cast after ceramic top plate 2 or integral cast sand mo(u)ld be heated to 800 ℃.
It below only is preferred implementation of the present utility model; be noted that for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications; can also be for the manufacture of the other products beyond the piston, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. ceramic armouring internal combustion engine, it is characterized in that, comprise metal body piston (1) and ceramic top plate (2), described ceramic top plate (2) is located at the top of described metal body piston (1), and shape, the size of ceramic top plate (2) outer surface are identical with the top of described metal body piston (1), at the even a plurality of pottery nails (3) that distribute of the internal surface of ceramic top plate (2), described ceramic top plate (2) is connected with metal body piston (1) by ceramic nail (3).
2. described ceramic armouring internal combustion engine according to claim 1 is characterized in that, an end of described pottery nail (3) and the internal surface of described ceramic top plate (2) is connected to an integral body, the other end is embedded in the described metal body piston (1).
3. described ceramic armouring internal combustion engine according to claim 1 is characterized in that, described pottery nail (3) is cylindric, and its diameter is 5mm～10mm, highly is 5mm～10mm.
4. each described ceramic armouring internal combustion engine in 3 according to claim 1 is characterized in that sectional area summations of all pottery nails (3) account for ceramic top plate (2) area 20%～30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201472152U CN202659370U (en) | 2012-04-10 | 2012-04-10 | Ceramic armored internal combustion engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201472152U CN202659370U (en) | 2012-04-10 | 2012-04-10 | Ceramic armored internal combustion engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659370U true CN202659370U (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201472152U Expired - Fee Related CN202659370U (en) | 2012-04-10 | 2012-04-10 | Ceramic armored internal combustion engine piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202659370U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619640A (en) * | 2012-04-10 | 2012-08-01 | 无锡工艺职业技术学院 | Ceramic sheathed internal combustion engine piston and manufacturing method thereof |
-
2012
- 2012-04-10 CN CN2012201472152U patent/CN202659370U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619640A (en) * | 2012-04-10 | 2012-08-01 | 无锡工艺职业技术学院 | Ceramic sheathed internal combustion engine piston and manufacturing method thereof |
| CN102619640B (en) * | 2012-04-10 | 2014-01-01 | 无锡工艺职业技术学院 | Ceramic sheathed internal combustion engine piston and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20150410 |
|
| EXPY | Termination of patent right or utility model |