Patent ID: 6772740
Filing Date: 2004-08-10
Classification: B01D,F02M

Abstract:
An evaporative fuel treating device for an internal combustion engine, comprising:a canister that adsorbs evaporative fuel generated in a fuel tank; a purge pump coupled to the canister, and that causes canister outlet gas to flow out from the canister; a separating unit that separates the canister outlet gas into treating gas containing a high concentration of evaporative fuel, circulating gas containing a medium concentration of evaporative fuel, and canister inlet gas containing a low concentration of evaporative fuel; a treating gas passage that introduces the treating gas from the separating unit into the fuel tank; a circulating gas passage that causes the circulating gas to circulate from the separating unit to a location upstream of the separating unit; and a canister inlet gas passage that causes the canister inlet gas to circulate from the separating unit to a location upstream of the canister.