JPH0442221U

JPH0442221U -

Info

Publication number: JPH0442221U
Application number: JP8381890U
Authority: JP
Priority date: 1990-08-07
Filing date: 1990-08-07
Publication date: 1992-04-09

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例における概念斜視図
、第２図は第１図における吸気弁座からの吸気流
入状況を示す概略平面図、第３図は第２図のＢ−
Ｂ線に沿つた断面図、第４図はバルブリフト量と
スワール比、流量係数との関係を示す図、第５図
は第１図のエンジンにおいて燃焼室内に発生する
スワールの状況を示した概略的説明図、第６図は
従来のエンジンにおける吸気装置の概略斜視図、
第７図は第６図における吸気弁座からの吸気流入
状況を示す概略平面図、第８図は第６図のエンジ
ンにおいて燃焼室内に発生するスワールの状況を
示した概略的説明図である。１０……シリンダ、１２……吸気ポート、１４
……吸気弁、１６……吸気弁座、１７……吸気弁
座の内径。 Fig. 1 is a conceptual perspective view of one embodiment of the present invention, Fig. 2 is a schematic plan view showing the intake air inflow situation from the intake valve seat in Fig. 1, and Fig. 3 is B--B in Fig. 2.
A cross-sectional view taken along line B, Figure 4 is a diagram showing the relationship between the valve lift amount, swirl ratio, and flow coefficient, and Figure 5 is a schematic diagram showing the situation of swirl occurring in the combustion chamber in the engine shown in Figure 1. FIG. 6 is a schematic perspective view of an intake system in a conventional engine.
7 is a schematic plan view showing the state of intake air flowing in from the intake valve seat in FIG. 6, and FIG. 8 is a schematic explanatory diagram showing the state of swirl occurring in the combustion chamber in the engine shown in FIG. 6. 10...Cylinder, 12...Intake port, 14
...Intake valve, 16...Intake valve seat, 17...Inner diameter of intake valve seat.

Claims

[Scope of utility model registration request]

An intake system for an engine, characterized in that the center of the inner diameter of the intake valve seat is eccentric to the positive swirl side from a plane including the centerline of the cylinder and the centerline of the intake valve.