JPS6369732U

JPS6369732U -

Info

Publication number: JPS6369732U
Application number: JP16290786U
Authority: JP
Priority date: 1986-10-25
Filing date: 1986-10-25
Publication date: 1988-05-11
Also published as: JPH0415942Y2

Description

[Brief explanation of the drawing]

第１図はシリンダヘツドの平面断面図、第２図
は第１図の―線に沿つてみた断面図、第３図
は第１図の―線に沿つてみた断面図、第４図
は別の実施例を示すシリンダヘツドの平面断面図
、第５図は第４図の―線に沿つてみた断面図
、第６図は第４図の―線に沿つてみた断面図
である。２…燃焼室、３…第１吸気弁、４…第２吸気弁
、５…吸気通路、６…シリンダヘツド側壁面、７
…シリンダ軸線、８…垂直面、９…分離壁、１０
…第１ストレートポート、１１…第２ストレート
ポート、１４，１６…膨出部。 Figure 1 is a plan sectional view of the cylinder head, Figure 2 is a sectional view taken along the - line in Figure 1, Figure 3 is a sectional view taken along the - line in Figure 1, and Figure 4 is a separate view. FIG. 5 is a cross-sectional view taken along the line --- in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line --- in FIG. 4. 2... Combustion chamber, 3... First intake valve, 4... Second intake valve, 5... Intake passage, 6... Cylinder head side wall surface, 7
...Cylinder axis, 8...Vertical surface, 9...Separation wall, 10
...First straight port, 11...Second straight port, 14, 16...Bulging portion.

Claims

[Scope of utility model registration request]

Each cylinder is equipped with a first intake valve and a second intake valve.
A common intake passage extends toward the intake valves, and the first intake valve and the second intake valve are arranged on both sides of a vertical plane that includes the cylinder axis and is perpendicular to the outer wall surface of the cylinder head. A separation wall extending from between the valve and the second intake valve toward the upstream side of the intake passage along the vertical plane transforms the intake passage into a first straight port toward the first intake valve and a second straight port toward the second intake valve. The axis of the first straight port and the axis of the second straight port are inclined in the same direction with respect to the vertical plane, and the angle of inclination of the first straight port axis with respect to the vertical plane is perpendicular to the axis of the second straight port. The first intake air flowing inside the first straight port along the axis of the first straight port is larger than the angle of inclination with respect to the plane, and the first intake air flows into the combustion chamber toward the periphery of the combustion chamber, and the second intake air flows along the axis of the second straight port. In an internal combustion engine in which the second intake air flowing through the straight port flows into the combustion chamber on the side opposite to the inflow position of the first intake air with respect to the cylinder axis and closer to the cylinder axis than the first intake air, The upper part of the side wall surface of the second straight port on the side away from the first straight port is bulged out so that the inflow axis of intake air flowing into the combustion chamber from the second straight port approaches the cylinder axis,
An intake port structure for an internal combustion engine in which the cross-sectional area of a straight port is larger than the cross-sectional area of a second straight port.