JPH0299243U

JPH0299243U -

Info

Publication number: JPH0299243U
Application number: JP758089U
Authority: JP
Priority date: 1989-01-27
Filing date: 1989-01-27
Publication date: 1990-08-07

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例を示す縦断面図、
第２図は第１図の―線断面図、第３図は第１
図の一部を拡大して示す図、第４図は第２実施例
を示す縦断面図、第５図は第４図と直交する側方
からの縦断面図、第６図は第４図の―線断面
図、第７図は第３実施例を示す斜視図、第８図は
作用を示すグラフである。１……シリンダブロツク本体、２……シリンダ
部、３……ライナ、２ａ，２ｂ……端部、２ｃ…
…中間部分、４，５……段部。 FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention;
Figure 2 is a cross-sectional view of Figure 1, and Figure 3 is a cross-sectional view of Figure 1.
FIG. 4 is a longitudinal sectional view showing the second embodiment; FIG. 5 is a longitudinal sectional view taken from the side orthogonal to FIG. 4; FIG. 6 is a longitudinal sectional view showing the second embodiment. FIG. 7 is a perspective view showing the third embodiment, and FIG. 8 is a graph showing the operation. DESCRIPTION OF SYMBOLS 1...Cylinder block body, 2...Cylinder part, 3...Liner, 2a, 2b...End part, 2c...
...middle part, 4, 5... step part.

Claims

[Scope of utility model registration request]

In an engine cylinder block structure in which the liner of the cylinder section is made of iron alloy and this liner is cast around a cylinder block body made of light alloy, the wall thickness at both axial ends of the liner is greater than the wall thickness at the middle part. The engine is characterized in that the step portion formed on the outer circumferential surface of the liner due to the change in wall thickness is tapered so that the diameter gradually increases from both ends of the liner toward the middle portion. Cylinder block structure.