JPS6149045U - - Google Patents
Info
- Publication number
- JPS6149045U JPS6149045U JP13394384U JP13394384U JPS6149045U JP S6149045 U JPS6149045 U JP S6149045U JP 13394384 U JP13394384 U JP 13394384U JP 13394384 U JP13394384 U JP 13394384U JP S6149045 U JPS6149045 U JP S6149045U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- width
- protrusion
- heat
- heat insulating
- 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.)
- Granted
Links
- 230000007423 decrease Effects 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
- 239000003779 heat-resistant material Substances 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Description
第１〜２図は本考案の実施例に関するもので第
１図は断熱円板リング状突起部の断面図、第２図
は突起の部材温度は空気層を利用した熱抵抗によ
り上層から順次低下するため材料が許容しうる面
圧ｑは上層から順次大きくなり圧力Ｐがｑを上ま
わることがない状況を示した線図、第３図は断熱
円板を用いた断熱ピストンの断面図、第４図は従
来の断熱円板における面圧Ｐに関する説明図であ
る。
１…ピストンクラウン、２…ピストンボデイ、
１６…断熱円板、１７…突起、１８…空気層、ｔ
…突起の幅。
Figures 1 and 2 relate to the embodiment of the present invention. Figure 1 is a cross-sectional view of a heat insulating disc ring-shaped projection, and Figure 2 shows that the temperature of the members of the projection gradually decreases from the upper layer due to thermal resistance using an air layer. Therefore, the allowable surface pressure q of the material gradually increases from the upper layer, and the diagram shows a situation in which the pressure P never exceeds q. Figure 3 is a cross-sectional view of an insulated piston using an insulated disk FIG. 4 is an explanatory diagram regarding the surface pressure P in a conventional heat insulating disc. 1...Piston crown, 2...Piston body,
16...Insulating disk, 17...Protrusion, 18...Air layer, t
...width of the protrusion.
Claims (1)
耐熱材料により構成され燃焼室を形成するピスト
ンクラウンと、このピストンクラウンとピストン
径の中央部で機械的に締結されたピストンリング
を有するアルミニユーム合金製ピストンボデイと
、前記ピストンクラウンとピストンボデイとの間
に複数本のリング状突起を有する断熱円板を１枚
又は複数枚有しこれら突起間に形成される空気層
の断熱性によつてピストンクラウンからピストン
ボデイへの熱の流れを抑止するものにおいて、上
記複数の断熱円板に設けられたリング状の複数本
の突起はピストンの半径方向の位置がほぼ同一半
径上に位置しており、かつ上記複数枚の断熱円板
に設けられたリング状の突起の幅がピストンクラ
ウンに接する最上層の突起幅に比べて、これより
下層に位置する突起幅が漸次小さくなり、さらに
ピストンボデイに接する最下層の突起幅に比べて
、これより上層に位置する突起幅が漸次小さくな
つて、中層部に位置する突起の幅が他の突起のそ
れに対し極小値をとる形状となつており、かつ上
記上下方向の突起幅の縮小角ならびに拡がり角は
片角で４５°以下となつていることを特徴とする
断熱円板を有する断熱ピストン。 An aluminum alloy piston body that has a piston crown that is made of heat-resistant materials such as heat-resistant alloys, heat-resistant steel, and heat-resistant ceramic materials and forms a combustion chamber, and a piston ring that is mechanically connected to the piston crown at the center of the piston diameter. and one or more heat insulating discs having a plurality of ring-shaped protrusions are provided between the piston crown and the piston body, and the piston is heated from the piston crown to the piston by the heat insulating properties of the air layer formed between these protrusions. In the device for suppressing the flow of heat to the body, the plurality of ring-shaped protrusions provided on the plurality of heat insulating discs are located on the same radius in the radial direction of the piston, and The width of the ring-shaped protrusion provided on each of the heat-insulating disks gradually becomes smaller than the width of the protrusion on the uppermost layer that contacts the piston crown, and the width of the protrusion on the lower layer that contacts the piston body gradually decreases. Compared to the width of the protrusion, the width of the protrusion located in the upper layer gradually becomes smaller, and the width of the protrusion located in the middle layer takes a minimum value compared to that of other protrusions, and the width of the protrusion in the above-mentioned vertical direction becomes smaller. A heat insulating piston having a heat insulating disc characterized in that the angle of reduction and the angle of expansion of the protrusion width are 45° or less at one corner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13394384U JPH0330608Y2 (en) | 1984-09-05 | 1984-09-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13394384U JPH0330608Y2 (en) | 1984-09-05 | 1984-09-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6149045U true JPS6149045U (en) | 1986-04-02 |
| JPH0330608Y2 JPH0330608Y2 (en) | 1991-06-27 |
Family
ID=30692469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13394384U Expired JPH0330608Y2 (en) | 1984-09-05 | 1984-09-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0330608Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63306259A (en) * | 1987-06-08 | 1988-12-14 | Tech Res Assoc Highly Reliab Marine Propul Plant | Thermal insulation structure employing ceramic |
| KR100450441B1 (en) * | 2001-10-30 | 2004-09-30 | 삼영기계주식회사 | Piston Assembly having Contraflow Thwarting Construction in Internal Combustion Engine |
-
1984
- 1984-09-05 JP JP13394384U patent/JPH0330608Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63306259A (en) * | 1987-06-08 | 1988-12-14 | Tech Res Assoc Highly Reliab Marine Propul Plant | Thermal insulation structure employing ceramic |
| KR100450441B1 (en) * | 2001-10-30 | 2004-09-30 | 삼영기계주식회사 | Piston Assembly having Contraflow Thwarting Construction in Internal Combustion Engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0330608Y2 (en) | 1991-06-27 |
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