JPS62101035U

JPS62101035U -

Info

Publication number: JPS62101035U
Application number: JP19214385U
Authority: JP
Priority date: 1985-12-16
Filing date: 1985-12-16
Publication date: 1987-06-27

Description

[Brief explanation of the drawing]

第１図はシリンダヘツドの底面図、第２図は内
燃機関の側面断面図、第３図は弁リフトを示す線
図である。５…第１吸気弁、６…第２吸気弁、７…第１排
気弁、８…第２排気弁、９…点火栓。 FIG. 1 is a bottom view of the cylinder head, FIG. 2 is a sectional side view of the internal combustion engine, and FIG. 3 is a diagram showing the valve lift. 5...first intake valve, 6...second intake valve, 7...first exhaust valve, 8...second exhaust valve, 9...ignition plug.

Claims

[Scope of utility model registration request]

A four-valve internal combustion engine comprising a pair of adjacent intake valves and a pair of adjacent exhaust valves, and an ignition plug located at the center of the top surface of a combustion chamber surrounded by the intake valves and exhaust valves. , the first one located on the opposite side with respect to the ignition plug.
The opening timing of the first intake valve is set before the intake top dead center so that the intake valve and the first exhaust valve have a valve overlap period, and the closing timing of the first exhaust valve is set after the intake top dead center. Furthermore, the opening timing of the second intake valve is made to substantially coincide with the closing timing of the first exhaust valve, and
An intake/exhaust valve device for a four-valve internal combustion engine, in which the closing timing of an exhaust valve substantially coincides with the opening timing of a first intake valve.