Patent ID: 7484500

Claim:
A fuel vapor treatment apparatus comprising: a canister for temporarily retaining fuel vapors generated in a fuel tank; said fuel tank being fluidly connected with fuel injectors of an engine via a main fuel supply tube; a first fuel vapor supply tube for allowing passage of the fuel vapors from the fuel tank to the canister; a second fuel vapor supply tube for allowing passage of the fuel vapors from the canister to said fuel injectors of the engine; said second fuel vapor supply tube being connected to and in fluid communication with said main fuel supply tube; and a booster pump disposed on the second fuel vapor supply tube; said booster pump being adapted: to suction outside air via the canister to purge the fuel vapors from the retention by the canister, to compress the purged fuel vapors and the suctioned outside air, and to feed the purged fuel vapors and the suctioned outside air in the form of a compressed gas to the fuel injectors via the second fuel vapor supply tube and via said main fuel supply tube; wherein during operation of the booster pump, said compressed gas is merged with liquid fuel flowing inside said main fuel supply tube.