JPS60114211U

JPS60114211U - Poppet valve device for internal combustion engine

Info

Publication number: JPS60114211U
Application number: JP213084U
Authority: JP
Inventors: 米窪　義春
Original assignee: 石川島播磨重工業株式会社
Priority date: 1984-01-10
Filing date: 1984-01-10
Publication date: 1985-08-02

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図は本考案の実施例を示す縦断側面図、第２図は本
考案の他の実施例を示す縦断側面図、第３図は冷却構造
を備えたポペット弁装置の例を示す縦断側面図である。１・・・可動部材、１５・・田ツドピストン部、２・・
・空気バネピストン、２１・・・空気バネシリンダ、２
４・・・空気バネ室、３・・・弁箱、４・・・第１のシ
リンダ部、４３・・・付勢手段の一部を構成する付勢用
空気室、５・・・第２のシリンダ部、５１．５７・・・
第２のシリンダ部の内端面、５２．５８・・・弁棒の上
端部の頂面、５３・・・緩衝用空気室、５４・・・第２
の通気′孔、５５・・・空気放出孔、６・・・弁棒、６
１・・・ポペット弁、６３・・・ロントビストン部、６
４・・・被押圧部、７１・・・油圧シリンダ、７２・・
・油圧タペット。 −ｆ７〜ｊ　　　−−−” Ｌ−−−−一一−−−−乃＋□　−Fig. 1 is a longitudinal side view showing an embodiment of the present invention, Fig. 2 is a longitudinal side view showing another embodiment of the invention, and Fig. 3 is a longitudinal side view showing an example of a poppet valve device equipped with a cooling structure. It is a diagram. 1...Movable member, 15...Top piston part, 2...
・Air spring piston, 21...Air spring cylinder, 2
4... Air spring chamber, 3... Valve box, 4... First cylinder portion, 43... Biasing air chamber forming a part of biasing means, 5... Second Cylinder part, 51.57...
Inner end surface of second cylinder portion, 52.58...Top surface of upper end of valve stem, 53...Buffer air chamber, 54...Second
ventilation hole, 55... air release hole, 6... valve stem, 6
1... Poppet valve, 63... Long piston part, 6
4...Pressed part, 71...Hydraulic cylinder, 72...
・Hydraulic tappet. −f7〜j −−−” L−−−−1−−−−ノ＋□ −

Claims

[Scope of utility model registration request]

An air spring formed by introducing compressed air into an air spring chamber, a movable member that is pushed down by a pressing mechanism against the restoring force of the air spring, and a combination that is fitted to the movable member so as to be slidable in the axial direction. and a valve stem with a poppet valve at the lower end;
A so-called hand throw for regulating the lower limit position of the valve stem, and a biasing means that biases the valve stem upward at the upper limit position and releases the bias when the movable member is at the lower limit position. Then, so that the valve stem at the upper limit position receives pressure from the suppression mechanism via the movable member, the volume is reduced by the pressed part formed on the valve stem and the valve stem sliding upward. , a buffer air chamber formed between the movable member and the valve stem, and a buffer air chamber formed to communicate with the air spring chamber, which is closed when the valve stem is at the upper limit position; It has a ventilation hole that is opened when the rod is at the lower limit position, and an air release hole that is formed to communicate the buffer air chamber with the outside air,
A poppet valve device for an internal combustion engine, wherein the valve stem is raised to the upper limit position of the valve stem by inertia against air pressure in a buffer air chamber when the movable member is stopped at the upper limit position.