Patent ID: 8900350

Claim:
A fuel vapor processing apparatus comprising: a canister capable of adsorbing and collecting a fuel vapor produced within a fuel tank, a separation membrane module capable of selectively permeating and separating a fuel component from a fuel vapor containing gas containing the fuel vapor desorbed from the canister, a gas supply device capable of pressure-feeding the fuel vapor containing gas from the canister to the separation membrane, an electronic control unit capable of controlling a flow rate of the fuel vapor containing gas supplied to the separation membrane; and a supplied gas concentration detecting device provided between the canister and the separation membrane and capable of detecting the concentration of the fuel vapor contained in the fuel vapor containing gas supplied to the separation membrane, and wherein the electronic control unit stores therein data relating to permeability and corresponding to the concentration of the fuel vapor contained in the supplied fuel vapor containing gas, and the electronic control unit controls the flow rate of the supplied fuel vapor containing gas on the basis of the concentration of the fuel vapor detected by the supplied gas concentration detecting device and the data relating to permeability.