Patent ID: 8561826

Claim:
A universal gasoline engine fuel tank cover, comprising an outer shell, an inner shell and a sealing cover located on the upper surface of the inner shell, characterized in that the outer shell and the inner shell are connected through a ratchet mechanism and a limiting mechanism, the inner shell having a partition I and a partition II disposed in its upper cavity to divide the upper cavity inwardly into a first adsorption chamber, a second adsorption chamber and a third adsorption chamber, the first adsorption chamber and the second adsorption chamber having fine carbon particles disposed therein, the third adsorption chamber having a cylindrical foam disposed therein, the bottom of the partition I being disposed with an air hole I connecting the third adsorption chamber to the fuel tank, and the bottom of the first adsorption chamber being disposed with an air hole II causing the first adsorption chamber to be connected to the atmosphere outside.