JPS6137410U

JPS6137410U - Fluid pressure driven valve control device

Info

Publication number: JPS6137410U
Application number: JP12242084U
Authority: JP
Inventors: 忠敬浅田; 将永井; 政志山川
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-08-09
Filing date: 1984-08-09
Publication date: 1986-03-08

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 the drawing]

第１図〜第５図は本考案の一実施例を示し、第１図は概
略全体図、第２図ａ，ｂは要部の縦断面図、第３図は
弁リフトとピストン速度と作動油流量−との関係を示す
図、第４図は開弁時の開口面積の変化を示す図、第５図
は閉弁時の開口面積あ変化を示す図である。第６図ａ，ｂは本考案の第２の実施例を示す要部の縦
断面図、第７図は本考案の第３の実施例を示す要部の縦
断面図である。第８図は供給口および排出口の他の形状例を示す図、第
９図は従来例を示す概略全体図である。１・・・排気弁、７・・・油圧シリンダ、７Ａ・・・中
間スリーブ、７．Ｂ・・・シリンダ本体、８・・・棒状
ピストン、８Ａ・・・ピストン本体、８Ｂ・・・カバー
ピストン、１８・・・流体通路、２０・・・供給孔、２
１・・・排出孔、２４・一・作動油供給口、２５・・・
作動油排出口。Figures 1 to 5 show an embodiment of the present invention; Figure 1 is a schematic overall view, Figures 2a and b are longitudinal sectional views of the main parts, and Figure 3 shows valve lift, piston speed, and operation. FIG. 4 is a diagram showing the change in the opening area when the valve is opened, and FIG. 5 is a diagram showing the change in the opening area when the valve is closed. FIGS. 6a and 6b are longitudinal cross-sectional views of essential parts showing a second embodiment of the present invention, and FIG. 7 is a longitudinal cross-sectional view of essential parts showing a third embodiment of the present invention. FIG. 8 is a diagram showing another example of the shape of the supply port and the discharge port, and FIG. 9 is a schematic overall view showing a conventional example. 1... Exhaust valve, 7... Hydraulic cylinder, 7A... Intermediate sleeve, 7. B... Cylinder body, 8... Rod-shaped piston, 8A... Piston body, 8B... Cover piston, 18... Fluid passage, 20... Supply hole, 2
1...Drain hole, 24.1.Hydraulic oil supply port, 25...
Hydraulic oil outlet.

Claims

[Claims for Utility Model Registration] 1. In a fluid pressure-driven valve control device that uses fluid pressure to control the opening and closing of an intake valve or exhaust valve of an internal combustion engine, a rod-shaped piston that is interlocked with the intake valve or exhaust valve, The rod-shaped piston is slidably spring-fitted into a fluid pressure cylinder provided above the combustion chamber of the engine, and forms an axial fluid passage in the rod-shaped piston from the end surface of the rod-shaped piston toward the inside of the rod-shaped piston. A supply hole and a discharge hole are formed in the side wall of the fluid pressure cylinder, and a fluid supply port that communicates with the supply hole and a fluid discharge port that communicates with the discharge hole are formed in the side wall of the fluid pressure cylinder. A fluid pressure driven valve control device characterized in that the fluid pressure cylinder is constituted by an intermediate sleeve that abuts on a proper position of a piston, and a cylinder body that supports the intermediate sleeve. 2. A fluid pressure-driven valve control device according to claim 1, characterized in that the intermediate sleeve is made of ceramics.