JPH0290342U

JPH0290342U -

Info

Publication number: JPH0290342U
Application number: JP16825588U
Authority: JP
Priority date: 1988-12-28
Filing date: 1988-12-28
Publication date: 1990-07-18

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る内燃機関用ピ
ストンの断面図、第２図イないしハは第１図のピ
ストンの低回転時における動きを示した断面図、
第３図は第２図イにおけるピストンの動きを示す
模式図、第４図イないしハは第１図のピストンの
高回転時における動きを示した断面図、第５図は
第４図イにおけるピストンの動きを示す模式図、
第６図は第１図の変形例を示すピストンの断面図
、である。１……ピストン、３……オイルリング溝、５…
…ピストンピン孔、６……スカート部（反スラス
ト側）、７……スカート部（スラスト側）、８…
…スリツト、９……オイルホール、１１……シリ
ンダ、Ｆ……慣性力、Ｇ……ピストン重心位置、
Ｏ……ピストンピン孔の中心、Ｐ……燃焼圧、Ｑ
……ピストンの中心線、Ｓ_１……反スラスト側、
Ｓ_２……スラスト側。 FIG. 1 is a sectional view of a piston for an internal combustion engine according to an embodiment of the present invention, FIGS. 2A to 2C are sectional views showing the movement of the piston of FIG. 1 at low rotation speed,
Fig. 3 is a schematic diagram showing the movement of the piston in Fig. 2A, Fig. 4A to C are cross-sectional views showing the movement of the piston in Fig. 1 at high rotation speed, and Fig. 5 is a schematic diagram showing the movement of the piston in Fig. 4A. Schematic diagram showing the movement of the piston,
FIG. 6 is a sectional view of a piston showing a modification of FIG. 1. 1... Piston, 3... Oil ring groove, 5...
...Piston pin hole, 6...Skirt part (anti-thrust side), 7...Skirt part (thrust side), 8...
...Slit, 9...Oil hole, 11...Cylinder, F...Inertia force, G...Piston center of gravity position,
O... Center of piston pin hole, P... Combustion pressure, Q
... Piston center line, S ₁ ... Anti-thrust side,
_S2 ... Thrust side.

Claims

[Scope of utility model registration request]

In a piston for an internal combustion engine that reciprocates within a cylinder, the center of the piston pin hole of the piston is offset toward the thrust side with respect to the center line of the piston, and the thickness of the skirt portion on the anti-thrust side is adjusted to the thickness of the skirt portion on the thrust side. A piston for an internal combustion engine, characterized in that the piston is thicker than the oil ring groove and has a slit on the anti-thrust side of the oil ring groove.