Apparatus for suppressing fuel evaporative gas emission

An apparatus for suppressing fuel evaporation gas emission comprising:

• a fuel evaporative gas treatment portion including a communication path that provides communication between an intake passage of an internal combustion engine and a fuel tank, a canister provided to communicate with the communication path, and a communication path opening/closing unit for opening/closing communication between the communication path and the intake passage;
• a negative pressure generation unit for generating negative pressure in the canister via a communication hole that provides communication between inside and outside of the canister;
• a pressure detection unit for detecting an internal pressure of the canister;
• and
• a control unit for performing a purge process by opening the communication path opening/closing unit during operation of the internal combustion engine to purge the fuel evaporative gas in the fuel tank and the canister to the intake passage, and performing, during the purge process and after the negative pressure generation unit is operated, abnormality detection of the fuel evaporative gas treatment portion based on a detection result of the pressure detection unit.