AIR INTAKE DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

An air intake device of an internal combustion engine which is capable of enhancing the air intake efficiency and reducing the size is provided. The internal combustion engine includes a cylinder head 4 , an intake manifold 6 provided at a longitudinal side surface of the cylinder head, and a head cover 5 provided on the cylinder head 4. The air intake device of the internal combustion engine includes an air cleaner 9 including an upper casing 11 and a lower casing 10 detachably coupled to each other and incorporating a filter element 12, an atmospheric air introduction pipe 14 for introducing air to the air cleaner, and an intake pipe 15 extending from the air cleaner to the intake manifold. The air cleaner is provided at an end of the head cover in a direction of the crank axis so that the lower casing of the air cleaner vertically corresponds to the head cover. The atmospheric air introduction pipe is arranged above the head cover to extend along an upper surface of the head cover in the direction of the crank axis, whereas the intake pipe is arranged to extend along the upper surface of the head cover toward the intake manifold without overlapping the atmospheric air introduction pipe.