JPH0228546U

JPH0228546U -

Info

Publication number: JPH0228546U
Application number: JP10536588U
Authority: JP
Priority date: 1988-08-11
Filing date: 1988-08-11
Publication date: 1990-02-23

Description

[Brief explanation of drawings]

第１図は本考案ピストンの実施例の縦断面図、
第２図は第１図のピストンリングの合い口部分の
平面図、第３図は圧力変化とリングの持上がりを
示す線図、第４図は本考案の他の実施例の縦断面
図を示す。第５図は従来装置の縦断面図、第６図
は第５図のピストンリングの合い口部分の平面図
、第７図は各ピストンリングに働く圧力を示す。
第８図及び第９図は従来装置における使用開始時
と長時間使用後の圧力変化とリングの持上がりを
示す線図である。１……シリンダライナ、２……ピストンリング
、３……ピストン、８……表面処理部。 FIG. 1 is a longitudinal sectional view of an embodiment of the piston of the present invention;
Fig. 2 is a plan view of the joint portion of the piston ring in Fig. 1, Fig. 3 is a diagram showing pressure changes and ring lifting, and Fig. 4 is a longitudinal sectional view of another embodiment of the present invention. show. FIG. 5 is a longitudinal sectional view of the conventional device, FIG. 6 is a plan view of the abutment portion of the piston rings in FIG. 5, and FIG. 7 shows the pressure acting on each piston ring.
FIGS. 8 and 9 are diagrams showing pressure changes and ring lifting in the conventional device at the beginning of use and after long-term use. 1... Cylinder liner, 2... Piston ring, 3... Piston, 8... Surface treatment section.

Claims

[Scope of utility model registration request]

A piston characterized in that a surface treatment such as plating with a soft material such as copper or thermal spraying with an abradable material is applied to the outer peripheral surface of the ring land of the piston to a thickness that is almost close to the gap between the piston and the cylinder liner. .