JPS63112208U

JPS63112208U -

Info

Publication number: JPS63112208U
Application number: JP358587U
Authority: JP
Priority date: 1987-01-16
Filing date: 1987-01-16
Publication date: 1988-07-19

Description

[Brief explanation of drawings]

第１図は本考案の第１実施例に係るエンジンの
オイル戻し通路構造の断面図、第２図は本考案の
第２の実施例に係るエンジンのオイル戻し通路構
造の断面図、第３図は従来のエンジンのシリンダ
ブロツクとシリンダヘツドとの締結部分の断面図
、である。１１……シリンダブロツク、１２……シリンダ
ヘツド、１４……オイルパン、１７……油穴、２
０……ウオータジヤケツト、２１，３１……パイ
プ、２２……クランクケース、２３，２４……小
孔、３５……気泡分離部材。 FIG. 1 is a cross-sectional view of an oil return passage structure of an engine according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of an oil return passage structure of an engine according to a second embodiment of the present invention, and FIG. 1 is a sectional view of a connecting portion between a cylinder block and a cylinder head of a conventional engine. 11...Cylinder block, 12...Cylinder head, 14...Oil pan, 17...Oil hole, 2
0...Water jacket, 21, 31...Pipe, 22...Crankcase, 23, 24...Small hole, 35...Bubble separation member.

Claims

[Scope of utility model registration request]

The oil supplied to the top side of the cylinder head is returned to the oil pan through a pipe whose one end is immersed in the oil in the oil pan and which has a small hole in the peripheral wall that penetrates the inside and outside. In the oil return passage structure of the engine, the pipe is disposed at a position that penetrates the water jacket of the cylinder block, and the other end of the pipe is made to protrude beyond the joint surface of the cylinder block with the cylinder head. Fit the protrusion into the oil hole that forms the oil return passage of the cylinder head,
An oil return passage structure for an engine, characterized in that the small hole of the pipe is located at an upper part of the crankcase.