| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently vaporize an air-fuel mixture by effectively heating the air-fuel mixture of injection fuel and to improve combustion efficiency. SOLUTION: An intake air heating device comprises two radiation plates 11 and 12 arranged facing each other through the flow of air-fuel mixture from the carburetor body 102 side being arranged along the inner peripheral wall of an intake pipe 101; a PTC heating body 13 to heat the radiation plates 11 and 12 through the flange parts of the radiation plates 11 and 12; and a heat insulator 2 consisting of a heat insulation member to hold the PTC heating body 13. The length of the radiation plate 11, positioned opposite to the bending direction of a branch pipe 101B corresponding to the bending direction of a branch pipe 101B with which the intake air pipe 101 is provided, of the radiation plates 11 and 12 is increased to a value higher than the length of other radiation plate 12 positioned opposite to one radiation. |
