But energy -efficient refueling system of self sealss

The utility model provides a but energy -efficient refueling system of self sealss, belongs to the technical field of oil filling opening of automobile system. It is moderate that it provides a simple structure compactness, reasonable in design, cost, can reach the emission that effectively reduces the fuel evaporation, can improve the but energy -efficient refueling system of self sealss that its anticorrosive ability satisfies new laws and regulations again. Outer check valve is fixed to be set up at the front end that adds the oil cup inner chamber, and interior check valve is fixed to be set up in the rear end that adds the oil cup inner chamber, outer check valve and add between the oil cup inside wall sealed through outer sealed rubber ring, interior check valve and add between the oil cup inside wall sealed through interior sealed rubber ring, the air hose with refuel the hose and all adopt low permeability's rubber materials to make. The utility model discloses a what add oil cup and low permeability