Fuel evaporator for internal combustion engine

A fuel evaporator attached between an air-fuel passage and an intake manifold, said air-fuel passage being provided with a throttle valve for adjusting the flow of the air-fuel mixture which is supplied to an engine passing through an air-fuel passage and fuel supply means for supplying fuel into said air-fuel passage, comprising:

• a heat insulating member which is disposed between said air-fuel passage and said intake manifold;
• a metal member including:
• a pipe portion having an inner bore and
• a flange portion which is integrally formed with said pipe portion so as to project outwards from the upper end of said pipe portion;
• a heating element made of ceramic body having positive temperature coefficient of resistivity, which is closely adhered in the outer surface of said metal member;
• said metal member being diaposed so that said pipe portion thereof extends along the wall of said intake manifold;
• and
• the outer peripheral portion of said flange portion thereof being supported by said heat insulating member so that fuel film flow of unevaporated fuel which flows downwards along said wall of said air-fuel passage is received by said flange portion of said metal member.