Portable engine-generator set

A portable engine-generator set including a soundproof cover defining an internal space therewithin for housing components of said engine-generator set, and a plurality of partitions provided in said internal space and, in cooperation with said cover and a shroud covering an engine of said engine-generator set, partitioning said internal space into

• (a) an intake compartment, said intake compartment including intake port means for drawing atmospheric air into said cover;
• (b) a heat source compartment in communication with said intake compartment, said heat source compartment comprising first and second subcompartments each forming independent cooling air passages and each having an air intake port in communication with said intake compartment, a generator of said engine-generator set being positioned within said first subcompartment, and said engine and a muffler of said engine-generator set being positioned within said second subcompartment;
• and
• (c) an exhaust compartment in communication with said heat source compartment, said exhaust compartment having an exhaust port means in communication with the atmosphere, and having intake ports in communication with said first and second subcompartments of said heat source compartment whereby air flow from said first and second subcompartments is combined in said exhaust compartment, exhaust gas from said muffler being discharged into said exhaust compartment, and said exhaust compartment having sound absorbing material provided on at least a portion of defining walls thereof such that said exhaust compartment forms a silencer box;
• wherein said exhaust gas discharged from said muffler into said exhaust compartment is mixed therein with said air flow from said first and second subcompartments.