JPH03104109U

JPH03104109U -

Info

Publication number: JPH03104109U
Application number: JP1237590U
Authority: JP
Priority date: 1990-02-09
Filing date: 1990-02-09
Publication date: 1991-10-29

Description

[Brief explanation of drawings]

第１図乃至第３図は本考案の実施例を示し、第
１図はエンジンの縦断側面図、第２図は要部の縦
断側面図、第３図は別実施例の要部の拡大断面図
であり、第４図は従来例を示す第２図相当図であ
る。１……エンジン、２……１の機壁、３……排気
ポート、４……排気弁、５……排気弁口、６……
排気弁ガイド孔、７……排気弁ガイド筒、１０…
…ステムシール。 1 to 3 show an embodiment of the present invention, FIG. 1 is a vertical side view of the engine, FIG. 2 is a vertical side view of the main part, and FIG. 3 is an enlarged cross-section of the main part of another embodiment. FIG. 4 is a diagram corresponding to FIG. 2 showing a conventional example. 1...engine, 2...machine wall of 1, 3...exhaust port, 4...exhaust valve, 5...exhaust valve port, 6...
Exhaust valve guide hole, 7... Exhaust valve guide tube, 10...
...Stem seal.

Claims

[Scope of Claim for Utility Model Registration] An exhaust valve guide hole 6 is penetrated through the machine wall 2 of the engine 1 facing the exhaust port 3 and the exhaust valve port 5, and an exhaust valve guide cylinder 7 is fitted into the exhaust valve guide hole 6. The valve shaft 4a of the exhaust valve 4 is slidably passed through the exhaust valve guide tube 7, and the stem seal 10 is hermetically fixed to the outer end 8 of the exhaust valve guide tube 7 on the side opposite to the exhaust port side. death,
In a valve shaft guide device for an engine exhaust valve, which is constructed by fitting a stem seal 10 slidably onto a valve shaft 4a, the exhaust valve guide cylinder 7 is made of a synthetic resin material with a low coefficient of friction. A cover 11 made of heat-resistant material is attached to the cylinder inner end 9 on the exhaust port side of the exhaust port 3.
A valve stem guide device for an exhaust valve of an engine, characterized in that the stem seal 10 is in oil-tight contact with the valve stem 4a.