JPH0234741U - - Google Patents
Info
- Publication number
- JPH0234741U JPH0234741U JP11397188U JP11397188U JPH0234741U JP H0234741 U JPH0234741 U JP H0234741U JP 11397188 U JP11397188 U JP 11397188U JP 11397188 U JP11397188 U JP 11397188U JP H0234741 U JPH0234741 U JP H0234741U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- valve
- intake valve
- engine
- pair
- 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
- 238000001816 cooling Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Description
第１図ないし第４図は本考案にかかるエンジン
のピストン構造の一実施例を示し、第１図はピス
トンの平面図、第２図は第１図の矢視方向側面
図、第３図は全体の縦断面図、第４図はその概略
平面図、第５図は別の実施例のピストンの平面図
、第６図は第５図の矢視方向側面図、第７図は
第５図の矢視方向側面図である。
１……エンジン、２……ピストン、４……シリ
ンダライナ、２１……ピストンクラウン部、２２
……ピストントツプランド、２２ａ……冷却用空
洞部の外周位置に対応する領域、３２，３３……
吸気バルブ用バルブリセス、３４，３５……排気
バルブ用バルブリセス、３６……ピストンピン、
３６ａ……ピストンピンボス、３８……冷却用空
洞部、４１……クリアランス、Ｌａ……ピストン
頂面におけるピストンピン軸線方向の中心線。
1 to 4 show an embodiment of the piston structure of an engine according to the present invention, in which FIG. 1 is a plan view of the piston, FIG. 2 is a side view in the direction of the arrow in FIG. 1, and FIG. 4 is a schematic plan view thereof, FIG. 5 is a plan view of a piston of another embodiment, FIG. 6 is a side view in the direction of the arrow in FIG. 5, and FIG. 7 is a schematic plan view thereof. FIG. 2 is a side view in the direction of arrows. DESCRIPTION OF SYMBOLS 1... Engine, 2... Piston, 4... Cylinder liner, 21... Piston crown part, 22
... Piston top land, 22a ... Area corresponding to the outer peripheral position of the cooling cavity, 32, 33 ...
Valve recess for intake valve, 34, 35... Valve recess for exhaust valve, 36... Piston pin,
36a... Piston pin boss, 38... Cooling cavity, 41... Clearance, La... Center line in the piston pin axial direction on the top surface of the piston.
Claims (1)
中心線を挾んで一側に一対の吸気バルブ用バルブ
リセスが設けられ他側に一対の排気バルブ用バル
ブリセスが設けられたエンジンのピストン構造に
おいて、ピストンクラウン部の各ピストンピンボ
ス形成側に前記吸気バルブ用バルブリセスの下方
からその吸気バルブ用バルブリセスに隣り合う前
記排気バルブ用バルブリセスの下方に延びる冷却
用空洞部がそれぞれ形成されているとともに、前
記ピストントツプランドとシリンダライナとの間
の燃焼時のクリアランスが前記冷却用空洞部の外
周位置に対応する領域で他の領域より大きくなる
ように形成されていることを特徴とするエンジン
のピストン構造。 In an engine piston structure in which a pair of intake valve recesses are provided on one side of the piston top surface and a pair of exhaust valve recesses are provided on the other side with respect to the center line in the piston pin axial direction, each piston crown portion Cooling cavities extending from below the intake valve valve recess to below the exhaust valve valve recess adjacent to the intake valve valve recess are formed on the piston pin boss formation side, and the piston top land and cylinder liner are connected to each other. 1. A piston structure for an engine, characterized in that a clearance during combustion between the cooling cavities is larger in a region corresponding to an outer peripheral position of the cooling cavity than in other regions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11397188U JPH0234741U (en) | 1988-08-29 | 1988-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11397188U JPH0234741U (en) | 1988-08-29 | 1988-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0234741U true JPH0234741U (en) | 1990-03-06 |
Family
ID=31354293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11397188U Pending JPH0234741U (en) | 1988-08-29 | 1988-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0234741U (en) |
-
1988
- 1988-08-29 JP JP11397188U patent/JPH0234741U/ja active Pending
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