Arrangement of multiple valves for an internal combustion engine

摘要

Three intake and two exhaust valves are arranged on a single circumferential line around the center of the combustion chamber with the longitudinal axes of the valves crossing at a single point on the longitudinal axis of the cylinder. An ignition plug is provided in the space between the two exhaust valves and is angled so that its forward end is directed towards the center of the combustion chamber. A single common cam shaft is provided horizontally at an intermediate position of the cylinder head between the intake valves and the exhaust valves.