Integrated fuel-mixing prevention device for diesel vehicle

An integrated fuel-mixing prevention device for a diesel vehicle comprising:

• a filler pipe having a guide wing insertion groove formed in an internal-diameter surface thereof, the filler pipe being fixedly mounted to a vehicle body;
• a retainer having an inlet and an outlet formed respectively in an upper end portion and a lower end portion thereof and having a guide wing through-hole formed in an internal-diameter surface thereof, the retainer being inserted into the filler pipe to be angularly rotated;
• a support bracket having a guide pin formed on an upper surface thereof, the support bracket being inserted into the internal-diameter surface of the retainer to be angularly rotated with the retainer;
• a pair of guide wings each having a guide hole configured for insertion of the guide pin, each guide wing passing through the guide wing through-hole and being inserted into the guide wing insertion groove wherein the respective guide wings move away from or toward each other when the retainer and the support bracket are angularly rotated;
• a first stopper and a second stopper mounted on opposite side portions of the support bracket to be angularly rotated and moved forward or backward thereof;
• and
• a flap located between the first stopper and the second stopper to be locked or unlocked, the flap performing a downward opening operation by an insertion pressure of a diesel fuel filling gun or a urea filling gun when unlocked.