JPS63110631U

JPS63110631U -

Info

Publication number: JPS63110631U
Application number: JP190987U
Authority: JP
Priority date: 1987-01-12
Filing date: 1987-01-12
Publication date: 1988-07-15

Description

[Brief explanation of the drawing]

第１図は本考案の吸気ポート構造を備えた１吸
気弁式エンジンの断面図で、第２図の―線に
沿つて見たところを示し、第２図はその模式的平
面図、第３図は第２図の―線を沿つた断面図
、第４図は本考案の吸気ポート構造を４バルブエ
ンジンに適用したところを示す平面図、第５図は
第４図の―線に沿つた断面図、第６図は比較
試験の結果を示すグラフである。１０…エンジン、１８…燃焼室、２２…吸気弁
、２８…主吸気ポート、３０…エンジン長軸、３
２…副吸気ポート。 Figure 1 is a cross-sectional view of a one-intake valve engine equipped with the intake port structure of the present invention, taken along line - in Figure 2; The figure is a sectional view taken along the line - in Fig. 2, Fig. 4 is a plan view showing the application of the intake port structure of the present invention to a 4-valve engine, and Fig. 5 is a sectional view taken along the - line in Fig. 4. The cross-sectional view and FIG. 6 are graphs showing the results of a comparative test. DESCRIPTION OF SYMBOLS 10...Engine, 18...Combustion chamber, 22...Intake valve, 28...Main intake port, 30...Engine long axis, 3
2...Sub-intake port.

Claims

[Claims for Utility Model Registration] 1. In an intake port structure for an internal combustion engine that includes a main intake port that supplies a combustion mixture to the combustion chamber of the internal combustion engine, and the main intake port is a straight port, An intake port structure characterized by providing means for generating a vertical swirl flow around a horizontal axis in a combustion air mixture flow. 2. The vertical swirl flow generating means includes a sub-intake port that opens into the main intake port in front of the main intake port outlet formed in the cylinder head, and the outlet of the sub-intake port is oriented substantially horizontally toward the combustion chamber. The intake port structure according to Claim 1 of the Utility Model Registration Claim. 3. The intake port structure according to claim 2, wherein the cross-sectional area of the auxiliary intake port is about 20 to 30% of the cross-sectional area of the main intake port. 4. The intake port structure according to claim 3, wherein the outlet of the main and sub-intake ports is substantially perpendicular to the engine length axis. 5. The intake port structure according to claim 4, wherein the cross-sectional shape of the outlet of the sub-intake port is elongated in the horizontal direction.