JPS6324347U

JPS6324347U -

Info

Publication number: JPS6324347U
Application number: JP11678486U
Authority: JP
Priority date: 1986-07-31
Filing date: 1986-07-31
Publication date: 1988-02-17

Description

[Brief explanation of the drawing]

第１〜５図は実施例で第１図は表面硬化処理を
ほどこしたシリンダの断面図、第２図は表面硬化
処理部の拡大図、第３図はピストンリング幅と相
隣接した軸方向の表面硬化処理帯の間隔長が表わ
された関係図、第４図、第５図はそれぞれ変形例
の第１図、第２図応当図、第６〜１０図は従来例
で第６図はシリンダ断面図、第７図はシリンダラ
イナの摩耗状況を示した線図、第８〜９図はそれ
ぞれ従来から一部に使用されているシリンダライ
ナの表面硬化処理帯の拡大図、第１０図は第８〜
９図のシリンダライナを使用したときの摩耗むら
を示すシリンダライナの断面図である。０１…第１実施例のシリンダライナ、０２ａ…
直線状の第１表面硬化処理帯、０２ｂ…同第２表
面硬化処理帯、０４…変形例のシリンダライナ、
０５ａ…曲線状の第１表面硬化処理帯、０５ｂ…
曲線状の第２表面硬化処理帯。 Figures 1 to 5 are examples, Figure 1 is a cross-sectional view of a cylinder that has been subjected to surface hardening treatment, Figure 2 is an enlarged view of the surface hardened part, and Figure 3 is an axial direction adjacent to the piston ring width. A relational diagram showing the interval length of the surface hardening treatment zone, FIG. 4 and FIG. 5 are respectively a modified example, FIG. 1 and FIG. 2 are corresponding diagrams, and FIGS. A sectional view of the cylinder, Fig. 7 is a diagram showing the wear status of the cylinder liner, Figs. 8 and 9 are enlarged views of the surface hardening treatment zone of the cylinder liner that has been used in some parts, and Fig. 10 is a diagram showing the wear status of the cylinder liner. 8th~
FIG. 9 is a cross-sectional view of the cylinder liner showing uneven wear when the cylinder liner of FIG. 9 is used. 01...Cylinder liner of the first embodiment, 02a...
Linear first surface hardening treatment zone, 02b... second surface hardening treatment zone, 04... cylinder liner of modified example,
05a...Curved first surface hardening treatment zone, 05b...
A curved second surface hardening treatment zone.

Claims

[Scope of utility model registration request]

In a cylinder liner in which a large number of surface hardening zones are partially applied using a laser or an electron beam in an area near the piston position when the piston is at top dead center of an internal combustion engine; straight or curved surface hardening zones. a first surface hardening treatment zone arranged at intervals in the circumferential direction, and a length corresponding to the length of a portion adjacent to the treatment zone in the axial direction of the cylinder liner and where the first surface hardening treatment zone is interrupted. A second surface hardening treatment zone which is hardened by the same amount as the piston ring is repeatedly installed in the axial direction of the cylinder liner, and the interval in the axial direction of the surface hardening treatment zone is configured to be narrower than the width of the piston ring. .