DUAL SPARK PLUG IGNITION INTERNAL COMBUSTION ENGINE HAVING IMPROVED CYLINDER HEAD CONFIGURATION

摘要

Intake and exhaust valves and an intake port of an internal combustion engine are such arranged that strong swirl turbulence of the inducted air-fuel mixture is produced in the combustion chamber. The swirl turbulence improves the combustion of the air-fuel mixture mixed with exhaust gases, initiated by the ignition with two spark plugs disposed in the combustion chamber.