JPS5956308U

JPS5956308U - Valve stagnation prevention device for engine intake and exhaust valves

Info

Publication number: JPS5956308U
Application number: JP15200982U
Authority: JP
Inventors: 毅西田; 磯田　光正; 田伏　智
Original assignee: 株式会社クボタ
Priority date: 1982-10-05
Filing date: 1982-10-05
Publication date: 1984-04-12
Also published as: JPS6233927Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来のエンジンの要部の縦断面図、第２図は本
考案に係る排気弁の弁膠着防止装置の縦゛断面図、第３
図は本考案に係る別の排気弁の弁膠着防止装置の縦断面
図である。１・・・エンジン、２・・・燃焼室、３・・・ポート、
４・・・ポート３の導出始端口、５・・・弁、６・・・
弁柄、７・・・ポート３の周壁、８・・・動弁案内孔、
９・・・動弁案内孔のポート３側の口部、１０・・・減
衰室、１１・・・環状連通孔、１２・・・小径部、１３
・・・気流案内孔、１４・・・小径部、１５・・・環状
突部、１６・・・弁柄６の先端側部１．１７・１８・１
９・・・掻取りエツジ、２０・・・環状空間。 φ 第１図第２図Fig. 1 is a longitudinal cross-sectional view of the main parts of a conventional engine, Fig. 2 is a longitudinal cross-sectional view of the valve sticking prevention device for an exhaust valve according to the present invention, and Fig. 3 is a longitudinal cross-sectional view of the main parts of a conventional engine.
The figure is a longitudinal cross-sectional view of another valve stagnation prevention device for an exhaust valve according to the present invention. 1... Engine, 2... Combustion chamber, 3... Port,
4... Outlet start port of port 3, 5... Valve, 6...
Valve stem, 7... Peripheral wall of port 3, 8... Valve train guide hole,
9... Mouth part of the valve guide hole on the port 3 side, 10... Damping chamber, 11... Annular communication hole, 12... Small diameter part, 13
...Airflow guide hole, 14...Small diameter portion, 15...Annular protrusion, 16...Tip side portion of valve stem 6 1.17.18.1
9... scraping edge, 20... annular space. φ Figure 1 Figure 2

Claims

[Claims for Utility Model Registration] 1. A motion that leads out the port 3 from the combustion chamber 2 of the engine 1 and passes through the peripheral wall 7 of the port 3 through the valve handle 6 of the valve 5 that opens and closes the lead-out starting end port 4 of the port 3. The valve guide hole 8 is fitted into the valve guide hole 8 so as to be able to move forward and backward, and an annular damping chamber 10 surrounding the valve handle 6 is provided at the mouth 9 of the valve guide hole 8 on the port 3 side. 3 through an annular communication hole 11 surrounding the valve stem 6, and a gap C between the inner peripheral surface of the damping chamber 10 and the valve stem 6.
2 is formed to be more than twice the gap C1 between the inner circumferential surface of the annular communication hole 11 and the valve stem 6, and the airflow flowing along the valve stem 6, through the annular space 11, and into the damping chamber 10 is prevented. A valve stagnation prevention device for an engine intake/exhaust valve, characterized in that an airflow guide surface 13 whose direction changes in the centrifugal direction is formed on the circumferential surface of a valve stem 6. 2. In the valve sticking prevention device for an engine intake/exhaust valve described in claim 1 of the utility model registration claim, the valve handle 6 has a base end portion and a distal intermediate portion formed to have small diameters, and a double diameter portion. Annular protrusion 15 and valve stem 6 formed between 12 and 14
The proximal side periphery of the distal end side portion 16 is formed to have approximately the same diameter as the valve guide hole 8, and the proximal side periphery and distal side periphery of the annular protrusion 15 and the proximal end of the distal side portion 16 of the valve handle 6. In addition to forming scraping edges 17, 18, and 19 on the side periphery, the annular space 20 between the circumferential surface of the small diameter portion 14 at the intermediate portion near the tip and the circumferential surface of the valve train guide hole 80 is formed so that the above-mentioned port is opened when the valve is opened to the maximum. Partially connected to 3.