INTERNAL COMBUSTION ENGINE

摘要

The invention pertains to an internal combustion engine which has two ignition plugs in a cylinder head, enhancement of an engine performance while increase in size of an engine main body is suppressed. The internal combustion engine includes a first ignition plug disposed on the inner side of a range surrounded by a plurality of intake valves and a plurality of exhaust valves with a cylinder head viewed in parallel to a cylinder axial line and standing uprightly along the cylinder axial line, and a second ignition plug inclined with respect to the cylinder axial line on the outer side of the range. The second ignition plug is disposed on the opposite side to a valve driving mechanism with respect to the cylinder axial line on the outer side of the range.