Patent ID: 7146801

Claim:
A fuel vaporizing device which supplies fuel vapor containing hydrocarbon to a fuel reformer which produces reformate gas having hydrogen as a main component from the fuel vapor by a catalytic reaction, comprising: a fuel vaporizer; a fuel injector which supplies fuel into the fuel vaporizer during normal running and start-up of the fuel reformer; an air injector which supplies air into the fuel vaporizer to produce an air-fuel mixture in the fuel vaporizer during the normal running and the start-up of the fuel reformer, an air supply amount of the air injector being controlled in relation to a fuel supply amount of the fuel injector so as to obtain an excess air factor of the air-fuel mixture corresponding to a predetermined rich air-fuel ratio; a glow plug which is disposed downstream of the fuel injector and the air injector in the fuel vaporizer and partially oxidizes the air-fuel mixture produced inside the fuel vaporizer; and a water injector which supplies moisture to the air-fuel mixture in the fuel vaporizer.