| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a forced air-cooling type internal combustion engine which can perform precise setting to the mutual air blowing proportion of a cylinder and a cylinder head for efficiently cooling the internal combustion engine by precisely partitioning an air blow by means of a centrifugal cooling fan. <P>SOLUTION: In the forced air-cooling type internal combustion engine, cooling air generated by rotation of the centrifugal cooling fan (85) is blown to a shroud (110) by a fan cover (100) and is guided to the cylinder (32) and the cylinder head (33) by the shroud (110) to perform the cooling. In the combustion engine, the upstream side end part (113p) of an air guiding partition plate (113) is formed along a flat plane substantially orthogonal to the rotary shaft (40) of the centrifugal cooling fan (85), the interior of rotation axial direction width (W) of a whirling blade (86) of the centrifugal cooling fan (85) is partitioned into two, and the cooling air is divided into a cylinder side air guiding path (B) and a head side air guiding path (C) by the air guiding partition plate (113) and is blown. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
