JPS613947U

JPS613947U - Piston for internal combustion engine

Info

Publication number: JPS613947U
Application number: JP8789884U
Authority: JP
Inventors: 二郎原田
Original assignee: イズミ工業株式会社
Priority date: 1984-06-13
Filing date: 1984-06-13
Publication date: 1986-01-11
Also published as: JPH0324857Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】第１図は従来の内燃機関用ピストンを示す側面図、第２
図は第１図における■〜■線断面図、第３図および第４
図はピストンの上死点における挙動を示すシリンダの縦
断面図、第５図は別の従来のピストンの側面図、第６図
はさらに別の従来のピストンの側面図、第７図はさらに
別の従来のピストンを示す縦断面図、第８図は本考案の
一実施−例に係る内燃機関用ピストンを示す正面図、第
９図は同側面図、第１０図は同平面図、第１１図は要部
縦断面図、第１２図は変形例に係る凹凸を示す要部縦断
面図である。なお図面に用いた符号において、１５・・・ピストン、
１６・・・リングランド部、１７−・・スカート部、１
８・・・ピン穴、１９・・・ピストンビンの軸線、２０
・・・ピストン中心、２１・・・凹凸、である。[Brief Description of the Drawings] Figure 1 is a side view showing a conventional piston for an internal combustion engine;
The figures are cross-sectional views taken along lines ■ to ■ in Figure 1, Figures 3 and 4.
The figure is a longitudinal sectional view of the cylinder showing the behavior of the piston at the top dead center, Figure 5 is a side view of another conventional piston, Figure 6 is a side view of yet another conventional piston, and Figure 7 is yet another. 8 is a front view showing a piston for an internal combustion engine according to an embodiment of the present invention, FIG. 9 is a side view of the same, FIG. 10 is a plan view of the same, and FIG. The figure is a longitudinal cross-sectional view of a main part, and FIG. 12 is a longitudinal cross-sectional view of a main part showing unevenness according to a modified example. In addition, in the symbols used in the drawings, 15... piston,
16...Ringland part, 17-...Skirt part, 1
8... Pin hole, 19... Axis of piston bin, 20
... piston center, 21 ... unevenness.

Claims

[Claims for Utility Model Registration] 1. Among the parts of the surface of the ring land part on both sides in a direction substantially perpendicular to the axial direction of the piston pin, the part where the piston contacts the inner wall of the cylinder at the vertical dead center is provided with unevenness. A piston for an internal combustion engine, characterized in that a piston is formed. 2. A piston for an internal combustion engine according to claim 1, wherein the unevenness is formed on the surface of a ring land portion within a range of 30 to 180 degrees in the circumferential direction thereof. . 3. Utility model registration claim 1, characterized in that the axis of the piston is offset with respect to the center of any piston, and the orientation of the protrusion V is opposite to the direction in which the unevenness is formed. The piston for an internal combustion engine according to item 1 or 2.