JPH0432206U

JPH0432206U -

Info

Publication number: JPH0432206U
Application number: JP7508790U
Authority: JP
Priority date: 1990-07-13
Filing date: 1990-07-13
Publication date: 1992-03-16

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係るエンジンの吸
気装置の要部概略断面図、第２図ａ，ｂは第１図
に示した同上エンジンの吸気装置の動作状態を説
明するための図、第３図は従来のエンジンにおけ
る吸気装置の一例を示した要部概略断面図である
。１，５１……シリンダ、２，５２……シリンダ
ヘツド、３，５３……吸気ポート、４，５４……
吸気弁座、６……バルブガイド、７，５５……吸
気弁、７ａ……ステム部、７ｂ……弁部、８……
補助吸気通路、１３，５７……燃焼室。 FIG. 1 is a schematic sectional view of a main part of an engine intake system according to an embodiment of the present invention, and FIGS. 2a and 2b are diagrams for explaining the operating state of the engine intake system shown in FIG. 1. , FIG. 3 is a schematic cross-sectional view of a main part showing an example of an intake system in a conventional engine. 1,51...Cylinder, 2,52...Cylinder head, 3,53...Intake port, 4,54...
Intake valve seat, 6... Valve guide, 7, 55... Intake valve, 7a... Stem part, 7b... Valve part, 8...
Auxiliary intake passage, 13, 57... combustion chamber.

Claims

[Scope of utility model registration request]

A stem part is disposed so as to be slidable across the intake port in the cylinder head, and the stem part is integrally attached to the lower end of the stem part and the intake air is drawn from the downstream opening end of the intake port by sliding the stem part. In an engine intake system equipped with an intake valve having a valve portion that abuts on and is separated from a valve seat, when the intake valve is closed, the intake valve is disposed outside the intake port, and when the intake valve is opened, the intake valve is disposed inside the intake port. An intake system for an engine, characterized in that an auxiliary intake passage is provided in the intake valve, the auxiliary intake passage having one end opened on the circumferential surface of the stem part that is moved and the other end opened on the bottom surface of the valve part.