Patent ID: 7261092

Claim:
A system for processing fuel vapor generated from fuel, comprising: a fuel tank including a pressure gauge detecting an internal pressure of the fuel tank; a gas separation membrane module including a first introduction port introducing fuel vapor generated in the fuel tank, a gas separation membrane separating fuel vapor introduced from the first introduction port into condensed fuel vapor and fuel lean vapor, a condensed-fuel-vapor discharge port disposed on an inlet side of the gas separation membrane and discharging condensed fuel vapor, and a fuel-lean-vapor discharge port disposed on a permeation side of the gas separation membrane and discharging fuel lean vapor; a first passage that provides fluid communication between the fuel tank and the first introduction port; a fuel-vapor dissolution device that introduces condensed fuel vapor discharged from the condensed-fuel-vapor discharge port into the fuel tank and dissolves this condensed fuel vapor in fuel; a canister including a second introduction port introducing fuel lean vapor discharged from the fuel-lean-vapor discharge port, an adsorption part adsorbing fuel vapor in fuel lean vapor introduced from the second introduction port, a second discharge port including a second control valve and discharging vapor having fuel vapor removed, and a desorption device desorbing fuel vapor from the adsorption part; a fuel-lean-vapor discharge passage that provides fluid communication between the fuel-lean-vapor discharge port and the second introduction port, the fuel-lean-vapor discharge passage including a pump reducing the pressure on the permeation side of the gas separation membrane; and an electronic control unit (ECU) comprising a first control device that, when the internal pressure of the fuel tank detected by the pressure gauge is at least a predetermined value, drives the pump to actuate the system and opens the second control valve and a second control device that desorbs fuel vapor adsorbed to the canister through the desorption device.