Patent ID: 7993424

Claim:
An air cleaner comprising: an air cleaner case, and; a cleaner element accommodated in the air cleaner case and being used for sectioning the inside of the air cleaner into a dirty side and a clean side so that outside air that has flowed into the dirty side is purified by the cleaner element and the purified air is caused to flow into the clean side, wherein the air cleaner case includes a lower casing holding the cleaner element thereon and an upper casing mounted on the lower casing and accommodates the cleaner element therein, wherein the lower casing includes a base on which the cleaner element is mounted, an exhaust duct extending downward from the base such that one end thereof communicates with the clean side and the other end thereof is communicable with the intake side of the engine, an inlet duct extending downward from the base along the exhaust duct such that the lower end thereof communicates with the outside, and an inlet cylinder extending upward from the base such that the upper end thereof communicates with the dirty side and the lower end thereof communicates with the upper end of the inlet duct.