| 摘要 |
PURPOSE:To improve atomization of a carburetor and to facilitate setting of the carburetor by providing, at a cooling cover, a discharge opening, which discharges air whose temperature is increased after it cooled an engine in the vicinity of an air cleaner inlet and the carburetor. CONSTITUTION:After a fan 16 is rotated for sending air into a cooling cover 14, when cooling air passes through the inside of the cooling cover 14, it cools a cylinder 12 and a cylinder head 13 and its temperature rises, while hot air is partially discharged from a main discharge opening and the remaining is discharged from an auxiliary discharge opening to the side of an air cleaner 20. Then, hot air from the auxiliary discharge opening 14e flows upwards through a gap between a side wall 14d of the cooling cover 14 and an inside case 22 of the air cleaner 20. The ambient temperature of a carburetor is held higher than that of outside air by this hot air, and it inhaled to the air cleaner 20 so as to supply it to the carburetor. Consequently, it is possible to make intake temperature high, and to surely perform atomization of fuel. |
