Fuel reserving device

摘要

According to the present invention, there is provided a fuel reserving device for reserving fuel therein. The device comprises a fuel tank for reserving fuel therein, and a fuel vapor tank for reserving fuel vapor therein. The fuel vapor is fed from said fuel tank to said fuel vapor tank and returned from said fuel vapor tank to said fuel tank. The fuel vapor is not returned from said fuel vapor tank to said fuel tank when a pressure in said fuel tank would be higher than a predetermined pressure if the fuel vapor was returned from said fuel vapor tank to said fuel tank.