A casing including a main body and a lid member and having a space formed in an inside thereof, a partition member that partitions the space in the inside of the casing into a dirty side in which a dirty side chamber and an introduction channel are formed,...

A cogeneration apparatus having an engine (16) and an air-cleaning device (45) provided to the engine is disclosed. The air-cleaning device (45) is provided with an air filter (66) and a hollow resonator (68). The air filter is provided at a position where...