JPH04105663U - Structure of internal combustion engine piston - Google Patents
Structure of internal combustion engine pistonInfo
- Publication number
- JPH04105663U JPH04105663U JP782391U JP782391U JPH04105663U JP H04105663 U JPH04105663 U JP H04105663U JP 782391 U JP782391 U JP 782391U JP 782391 U JP782391 U JP 782391U JP H04105663 U JPH04105663 U JP H04105663U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- wear
- ring
- internal combustion
- combustion engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 6
- 229910000676 Si alloy Inorganic materials 0.000 claims abstract description 6
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 4
- 229910001366 Hypereutectic aluminum Inorganic materials 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 4
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
(57)【要約】 （修正有）
【目的】ピストンの耐摩環を過共晶アルミニウムけい素
合金で形成して軽量化すると共に、耐摩環の熱伝導性の
向上とピストンのコスト低減を図る。
【構成】アルミニウムの合金で構成したピストン１に、
Ｓｉ１５〜２５％を含む過共晶アルミニウムけい素合金
でリンク状に形成した耐摩環２を設けると共に、ピスト
ン１の機械加工時にリング溝３を形成する。
(57) [Summary] (with amendments) [Purpose] To reduce the weight of the piston's wear ring by forming it from a hypereutectic aluminum-silicon alloy, as well as to improve the thermal conductivity of the wear ring and reduce the cost of the piston. [Construction] Piston 1 made of aluminum alloy,
A wear-resistant ring 2 formed in a link shape from a hypereutectic aluminum-silicon alloy containing 15 to 25% Si is provided, and a ring groove 3 is formed during machining of the piston 1.
Description
【０００１】0001
本考案は内燃機関のピストンの構造に関する。 The present invention relates to the structure of a piston for an internal combustion engine.
【０００２】0002
内燃機関特にディーゼルエンジンのピストンは燃焼温度が高いこと、すすの発 生が多いこと等のため、最上部のピストンリング溝の摩耗が激しい。これを防止 するために、上記ピストンリング溝の部分に鉄、ニッケル合金であるニレジスト で形成した耐摩環を鋳ぐるんでいる。 The pistons of internal combustion engines, especially diesel engines, have high combustion temperatures and generate soot. Due to the large amount of raw material, the top piston ring groove is severely worn. prevent this In order to A wear-resistant ring made of
【０００３】0003
しかしながら、ニレジストは熱伝導率が低く、また、アルミニウムに比し比重 が大きくピストン上部の重量が増加し、ピストン運動性能上から好ましくない。 また、近年、アルミニウムと繊維とを複合化した溶湯鍛造ピストンがあるが、コ ストが高く一般に普及していない。 However, Niresist has low thermal conductivity and has a specific gravity compared to aluminum. This increases the weight of the upper part of the piston, which is unfavorable from the viewpoint of piston motion performance. In addition, in recent years, there are molten metal forged pistons that are made of a composite of aluminum and fibers. It is not popular among the general public due to high cost.
【０００４】 本考案は、軽量で、熱伝導性が良く、耐摩耗性に優れた耐摩環を設けたピスト ンを提供することを目的としている。0004 This invention is a piston equipped with a wear-resistant ring that is lightweight, has good thermal conductivity, and has excellent wear resistance. The purpose is to provide the following information.
【０００５】[0005]
一般にアルミニウムけい素合金のけい素含有量が高いと、初晶Ｓｉが基地中に 分散することによって耐摩耗性が優れている。しかし、この硬い初晶Ｓｉが機械 加工では切削性が悪い原因となるため、Ｓｉの含有量は１５〜２５％が好ましい 。また、他の物性値をニレジストと比較すると、図３に示すように過共晶Ａｌ− Ｓｉ合金は比重で約１／３、熱伝導率で約２．５倍、鋳ぐるんだ場合の境界強度 も３倍あり優れていることが解る。 Generally, when the silicon content of aluminum-silicon alloy is high, primary Si crystals are present in the matrix. Dispersion provides excellent wear resistance. However, this hard primary Si is mechanically The Si content is preferably 15 to 25% because it causes poor machinability during processing. . In addition, when comparing other physical properties with Niresist, as shown in Figure 3, hypereutectic Al- Si alloy has a specific gravity of about 1/3, thermal conductivity of about 2.5 times, and boundary strength when cast. It can be seen that it is 3 times better.
【０００６】 本考案は上記の知見に基づいてなされたものである。[0006] The present invention has been made based on the above findings.
【０００７】[0007]
本考案によれば、アルミニウム合金で構成されたピストンの少なくとも外周の リング溝の周囲に過共晶アルミニウムけい素合金で形成した耐摩環を設けている 。 According to the present invention, at least the outer circumference of the piston made of aluminum alloy A wear-resistant ring made of hypereutectic aluminum silicon alloy is provided around the ring groove. .
【０００８】[0008]
上記のように構成された内燃機関のピストンの構造において、ピストンの上部 は軽量化されて重量バランスが良くなり、運動性能が改善される。また、耐摩環 の熱伝達率が向上するためリング溝周辺のピストンの温度は低下する。 In the structure of the internal combustion engine piston configured as described above, the upper part of the piston The weight is reduced, the weight balance is better, and the maneuverability is improved. In addition, wear-resistant rings The temperature of the piston around the ring groove decreases because the heat transfer coefficient improves.
【０００９】[0009]
以下図面を参照して本考案の実施例について説明する。 Embodiments of the present invention will be described below with reference to the drawings.
【００１０】 図１において、アルミニウム合金で構成されたピストン１には、Ｓｉ１５〜２ ５％を含む過共晶アルミニウムけい素合金でリング状に形成された耐摩環２が鋳 ぐるまれている。そして、リング溝３はピストン１の機械加工時に同時に加工さ れている。0010 In FIG. 1, a piston 1 made of aluminum alloy has Si15 to 2 A wear-resistant ring 2 formed in a ring shape from a hypereutectic aluminum-silicon alloy containing 5% is cast. Being surrounded. The ring groove 3 is machined at the same time as the piston 1 is machined. It is.
【００１１】 従って、ピストン１は、前述の知見に示す通り耐摩環２の軽量化により上部が 軽くなり、上下の重量バランスが改善される。また、耐摩環２の熱伝達率が高く なるので、この部分の熱伝導性は良くなる。[0011] Therefore, as shown in the above-mentioned knowledge, the upper part of the piston 1 is It is lighter and the vertical weight balance is improved. In addition, the heat transfer coefficient of wear-resistant ring 2 is high. Therefore, the thermal conductivity of this part is improved.
【００１２】 図２は、本考案の別の実施例を示し、耐摩環１１によりピストン１０のクラウ ン部１２までを一体に構成した例である。この実施例では、耐摩環１１の比重が ピストン１０の比重と殆ど同じため、重量の増加なしに、ピストンの上下運動に よるクラウン部１２と図示しないシリンダ壁との摺動に対しても耐摩耗性が向上 する。0012 FIG. 2 shows another embodiment of the invention, in which the wear ring 11 provides a crown for the piston 10. This is an example in which the parts up to the main part 12 are integrated. In this embodiment, the specific gravity of the wear ring 11 is Since the specific gravity is almost the same as that of the piston 10, it is possible to move the piston up and down without increasing the weight. The wear resistance is also improved against sliding between the crown portion 12 and the cylinder wall (not shown). do.
【００１３】[0013]
本考案は、以上説明した通り構成されているので、ピストンは軽量化と共に上 下の重量バランス及び耐摩環の熱伝導性が改善される。さらに、ニレジストの場 合に必要であった鋳造前のアルミナイズ処理も不用のためコスト低減にも寄与す る。 Since the present invention is constructed as explained above, the piston is lightweight and has an improved design. The lower weight balance and the thermal conductivity of the wear ring are improved. In addition, the place of Niresist This also contributes to cost reduction as there is no need for aluminizing treatment before casting, which was necessary when casting. Ru.
【図１】本考案の一実施例を示す側断面図。FIG. 1 is a side sectional view showing an embodiment of the present invention.
【図２】本考案の別の実施例を示す側断面図。FIG. 2 is a side sectional view showing another embodiment of the present invention.
【図３】過共晶Ａｌ−Ｓｉ合金とニレジストとの物性値
の比較図。FIG. 3 is a comparison diagram of physical property values between a hypereutectic Al-Si alloy and Niresist.
１・・・ピストン ２・・・耐摩環 １０・・・ピストン １１・・・耐摩環 １２・・・クラウン部 1...Piston 2...Wear-resistant ring 10...Piston 11...Wear-resistant ring 12...Crown part
Claims (1)
の少なくとも外周のリング溝の周囲に過共晶アルミニウ
ムけい素合金で形成した耐摩環を設けたことを特徴とす
る内燃機関のピストンの構造。1. A structure of a piston for an internal combustion engine, characterized in that a wear-resistant ring made of a hypereutectic aluminum silicon alloy is provided around a ring groove on at least the outer periphery of the piston made of an aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP782391U JPH04105663U (en) | 1991-02-21 | 1991-02-21 | Structure of internal combustion engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP782391U JPH04105663U (en) | 1991-02-21 | 1991-02-21 | Structure of internal combustion engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04105663U true JPH04105663U (en) | 1992-09-11 |
Family
ID=31899246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP782391U Pending JPH04105663U (en) | 1991-02-21 | 1991-02-21 | Structure of internal combustion engine piston |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04105663U (en) |
-
1991
- 1991-02-21 JP JP782391U patent/JPH04105663U/en active Pending
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