Evaporated fuel treatment device for vehicle

An evaporated fuel treatment device for a vehicle comprising:

• a fuel tank for storing fuel;
• a fuel supply cap for opening and closing a fuel filling port of the fuel tank;
• an evaporated fuel storage unit storing evaporated fuel using an absorption agent;
• a charge passage allowing communication between the fuel tank and the evaporated fuel storage unit;
• a communication chamber formed in the fuel supply cap, the communication chamber allowing communication between the charge passage and an inside of the fuel tank, wherein the communication chamber has a pair of cylindrical portions and has one end opened toward the charge passage and the other end opened in an inside of the fuel tank;
• a positive pressure adjusting valve in one of the cylindrical portions, the positive pressure adjusting valve being opened when an inner pressure of the fuel tank becomes a first predetermined pressure or higher such that the evaporated fuel generated in the fuel tank is supplied to the evaporated fuel storage unit through the one of the cylindrical portions and the charge passage;
• a negative pressure adjusting valve in the other one of the cylindrical portions, the positive pressure adjusting valve being opened when the inner pressure of the fuel tank becomes a second predetermined pressure or lower such that atmospheric air is supplied to the fuel tank from the evaporated fuel storage unit through the other one of the cylindrical portions and the charge passage;
• and
• a spherical rollover valve arranged in the one of the cylindrical portions and below the positive pressure adjusting valve, the spherical rollover valve closing the positive pressure adjusting valve when the fuel tank is inclined at an angle equal to or larger than a predetermined angle.