JPH01157253U

JPH01157253U -

Info

Publication number: JPH01157253U
Application number: JP5218288U
Authority: JP
Priority date: 1988-04-20
Filing date: 1988-04-20
Publication date: 1989-10-30

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係るピストンリ
ングの縦断面図、第２図は第１図のピストンリン
グの合口部の正面図、第３図は第１図のピストン
リングの天地を逆転して示した部分透視斜視図、
第４図は第１図のピストンリングの合口部におけ
るガス流れの状態を示す部分斜視図、第５図は第
４図のピストンリング部分の縦断面図、第６図は
本考案の第２実施例に係るピストンリングの縦断
面図、第７図は第６図のピストンリングの矢視
に係る部分背面図、第８図は本考案の第３実施例
に係るピストンリングの縦断面図、第９図は第８
図のピストンリングの矢視に係る部分背面図、
第１０図は本考案の第４実施例に係るピストンリ
ングの縦断面図、第１１図は従来のピストンリン
グの合口部の斜視図、第１２図は従来の２枚合せ
ピストンリングの縦断面図、第１３図は第１２図
のピストンリングの合口部の正面図、第１４図は
第１２図のピストンリングの合口部におけるガス
流れの状態を示す縦断面図、第１５図は第１４図
のピストンリング部分の斜視図、第１６図は第１
２図のピストンリングの合口部におけるオイル上
りの状態を示す縦断面図、である。２１……ピストン、２２……トツプリング溝、
２３……シリンダボア、２４……ピストンリング
、２５，５２，６２……上側リング、２６，４１
，５１，６１……下側リング、２７……上側リン
グの合口部、２８ａ，２８ｂ，５３ａ，５３ｂ…
…段部、２９，４２……下側リングの合口部、５
４……突起部、Ｃ_２……合口隙間。 Fig. 1 is a longitudinal sectional view of a piston ring according to the first embodiment of the present invention, Fig. 2 is a front view of the abutment part of the piston ring shown in Fig. 1, and Fig. 3 shows the top and bottom of the piston ring shown in Fig. 1. Partially transparent perspective view shown inverted;
FIG. 4 is a partial perspective view showing the state of gas flow at the abutment of the piston ring shown in FIG. FIG. 7 is a partial rear view of the piston ring in the direction of the arrow in FIG. 6; FIG. 8 is a longitudinal cross-sectional view of the piston ring according to the third embodiment of the present invention; Figure 9 is the 8th
A partial rear view of the piston ring in the direction of the arrow in the figure.
Fig. 10 is a longitudinal sectional view of a piston ring according to a fourth embodiment of the present invention, Fig. 11 is a perspective view of the abutment part of a conventional piston ring, and Fig. 12 is a longitudinal sectional view of a conventional two-ply piston ring. , Fig. 13 is a front view of the abutment part of the piston ring in Fig. 12, Fig. 14 is a longitudinal sectional view showing the state of gas flow at the abutment part of the piston ring in Fig. 12, and Fig. 15 is a front view of the abutment part of the piston ring in Fig. 12. A perspective view of the piston ring part, Fig. 16 is the first
FIG. 3 is a longitudinal cross-sectional view showing a state of oil rising at the abutment portion of the piston ring in FIG. 2; 21... Piston, 22... Top spring groove,
23... Cylinder bore, 24... Piston ring, 25, 52, 62... Upper ring, 26, 41
, 51, 61...lower ring, 27...upper ring abutment, 28a, 28b, 53a, 53b...
...Step part, 29, 42...Abutment part of lower ring, 5
4...Protrusion, _C2 ...Abutment gap.

Claims

[Scope of utility model registration request]

A piston ring that is installed in the top ring groove of a piston, and has a two-ring configuration of an upper ring and a lower ring, with the upper ring having radially outward tension and having an outer peripheral surface. The lower ring is in sliding contact with the cylinder bore, has a radially inward tension, has a clearance between the outer circumferential surface and the cylinder bore, and the radially inward tension makes the abutment gap substantially zero. A piston ring characterized by: