Apparatus for controlling fuel evaporated from internal combustion engine

An apparatus for controlling evaporated fuel of an internal combustion engine, having first and second canisters for adsorbing evaporated fuel produced in a fuel tank, the first and second canisters being connected in series between an atmospheric hole of the first canister and an intake duct of the engine, air entering the atmospheric hole passing through the first and second canisters and releasing the fuel adsorbed by the first and second canisters, the air and released fuel being purged into the intake duct, comprising:

• a first path for guiding evaporated fuel from the fuel tank to the first canister when the fuel tank is replenished with fuel;
• a second path for guiding evaporated fuel from the fuel tank into an adsorption material disposed in the second canister during the operation of the engine, wherein the evaporated fuel leaves the second path and enters the adsorption material at a location sufficiently separated from a downstream surface thereof so that the fuel adsorption state of a portion of the adsorption material of the second canister adjacent to an outlet from the second canister to a path for purging air and fuel from the second canister into the intake duck is substantially unchanged between a given purge operation and the next purge operation;
• and
• fuel supply control means for calculating, at a second purge operation, a fuel injection quantity to achieve a target air-fuel ratio according to a concentration of purged fuel of a first purge operation.