| 摘要 |
A fuel evaporator to be installed between a carburetter and an intake manifold of an internal combustion engine for heating an air-fuel mixture flowing through an air-fuel passage of the carburetter is disclosed. The fuel evaporator comprises at least one ceramic heater formed of a circular PTC ceramic plate having honeycomb-shaped open passages, and at least one electrically conductive metallic plate having honeycomb-shaped open passages of which shape and arrangement are equal to those of the open passages of the PTC ceramic plate. The metallic plate is disposed on one surface or both surfaces of the ceramic heater so that the open passages of the metallic plate are coaxial with those of the ceramic heater. The ceramic heater and the metallic plate are disposed on a stepped portion formed in an insulator and the outer peripheral portion of the metallic plate is fixed to the insulator which is interposed between the carburetter and the intake manifold. The edge portion of the metallic plate, defining at least one open passage is bent in the axial direction thereof and closely inserted into the corresponding open passage of the ceramic heater.
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