System for controlling shut-off of a fuel pump nozzle in filling a fuel tank

A system for controlling shut-off of a fuel pump nozzle, the system comprising:

• a fuel evaporation gas blocking unit mounted on a filler pipe of a fuel tank and configured to separate an outer side space of a fuel injection part of the fuel pump nozzle inserted into an inside thereof into a first space into which external air is introduced and a second space into which fuel evaporation gas that is discharged from the fuel tank is introduced and to block the fuel evaporation gas from being introduced into the first space;
• an external air suction jet pump mounted at an inside of the fuel tank and configured to suck external air thereinto and discharge the external air into the inside of the fuel tank, by receiving a portion of fuel transmitted from a fuel pump in the fuel tank as a working fluid;
• and
• a jet pump connection hose configured to connect the first space and the external air suction jet pump to each other so that a flow of external air is possible.