FUEL EVAPORATIVE GAS CONTROLL SYSTEM FOR VEHICLE

摘要

The present invention relates to an evaporative control system for a vehicle, to easily measure and manage the air resistance using a differential pressure sensor, and to completely purge a remaining fuel vapor in a canister using an air pump after an engine stop. According to an embodiment of the present invention, the evaporative control system for a vehicle comprises: an intake line to provide a combustion air to an engine; a canister to collect fuel vapor through a charging line; a purge line connected between the canister and the intake line; an air line connected between the canister and the outside air; a differential pressure sensor installed on the canister; and an air pump installed on the air line. The differential pressure sensor is arranged on at least one of a purge port and a charging port of the canister to measure a differential pressure during purging of the fuel vapor and to generate an alert signal when the measured differential pressure exceeds a predefined value. The air pump is provided to operate during a predefined period after an engine stop to blow the outside air to the canister.