ENGINE

摘要

An engine, wherein an intake valve openably driven by an intake side valve system having an intake side camshaft and an exhaust valve openably driven by an exhaust side valve system having an exhaust side camshaft are disposed in a cylinder head forming a part of an engine body. The intake side camshaft (30) is disposed at a position such that the distance thereof from a combustion chamber (17) is larger than that in the case of the exhaust side camshaft (35) along the axis (C) of the cylinder of the engine body (11) to position the intake side camshaft higher than the exhaust side camshaft (35). Thus, the exhaust side valve system can be efficiently lubricated and cooled by easily using a lubricating oil, used for lubricating and cooling the intake side valve system, for the exhaust side valve system.