Fuel tank cap with separated charcoal canister

Abstract

The fuel tank cap with a separated charcoal canister includes a fuel tank cap, a charcoal cap, and a fuel tank outer cap. A filling room is disposed on the charcoal cap, and the upper opening of the filling room is covered by the fuel tank outer cap. The fuel tank cap with a slot is disposed under of the charcoal cap. The fuel tank can be connected in detachable way with either the charcoal cap or fuel tank outer cap. A through orifice is disposed in the center of the fuel tank cap. The through orifice and the filling room filled by fuel-absorption substrate are connected by the first passageway disposed on the charcoal cap. The charcoal canister is a standard product, and it can fit to variable fuel tanks through the variable sized fuel tank cap, thereby both design and manufacturing processes are simplified and costs are saved.

Dependencies are inferred from the claim text.