INTERNAL COMBUSTION ENGINE

Abstract

The invention proposes a structure capable of further enhancing the efficiency of flame propagation in the combustion chamber of an internal combustion engine at the section created in the intake manifold. Internal combustion engine (10) according to the design with intake manifold (60) has intake valve (34) opening and closing by intake valve (44), exhaust manifold (64) has exhaust valve (36) opening and closing by exhaust valve (46), the partition (70) is created to divide the intake manifold (60) into a group of intake flow conduits with the first intake manifold (72), the first intake manifold (72) is capable of operating as a longitudinal vortex flow conduit, the deflection part (DP) is designed to deflect the intake air from the first intake manifold (72) to one side of the virtual plane (1S) when determining the virtual plane (IS) passing through the center (34a) of the intake valve (34) and the center (36a) of the exhaust valve (36) and extending parallel to the cylinder axis (C); and spark plug (54) which is created in the combustion chamber (32) and is positioned to fill one side of the flat surface (IS).