FUEL VAPOR REMOVAL METHOD AND SYSTEM FOR FLAMMABILITY REDUCTION

摘要

PROBLEM TO BE SOLVED: To provide a fuel vapor removal method and a fuel vapor removal system that include: removing fuel vapor from ullage of a fuel tank of a vehicle; adsorbing the fuel vapor removed from the ullage onto adsorption media on the vehicle; and desorbing the fuel vapor from the adsorption media while on the vehicle.SOLUTION: A fuel vapor removal method includes: purging fuel vapor from ullage of a fuel tank using air added into the ullage; reducing a fuel-air ratio in the ullage using the air purging; and adsorbing the purged fuel vapor onto adsorption media. A fuel vapor removal system 1 includes: a fuel tank 100 having ullage; an adsorption system 5 including fuel vapor adsorption media; and a controller 3. The controller includes a flammability determination system and is configured to start fuel vapor removal from the ullage onto the adsorption media by the purging system before the ullage exhibits flammability.