Patent ID: 8047167

Claim:
A multi-cylinder internal combustion engine, comprising: a valve operating device, said valve operating device performing open-close driving of an engine valve that is arranged in a cylinder head of an engine body in an openable-and-closable manner, the engine body having a plurality of cylinders, each of the plurality of cylinders having a piston fitted therein; a hydraulic control device; a hydraulic valve rest mechanism mounted on the valve operating device, said hydraulic valve rest mechanism being operated by oil pressure that is controlled by the hydraulic control device so as to close and rest engine valves of at least one of the plurality of cylinders, said hydraulic valve rest mechanism for bringing the cylinders into a rest state, wherein said hydraulic control device is arranged on a head cover of the cylinder head and at least a part of the hydraulic control device is arranged within a boundary formed by an outer surface of the piston fitted within the cylinder that is expected to assume a cylinder rest state, the outer surface of the piston being parallel to a longitudinal axis of the cylinder.