| 摘要 |
PURPOSE:To reduce loss of cooling air and to improve utility efficiency of a fan by preparing two diaphragms in the spiral shape to dividingly lead cooling air from the cooling fan of a V-engine, and arranging the two diaphragms with respective air leading end parts fixed at a phase difference of 180 deg.. CONSTITUTION:A centrifugal fan 5 for cooling is provided on the end part of the crank shaft 3 of a V-engine and arranged into a fan housing 6. And, two diaphragms 9, 10 to dividingly lead cooling air into respective cylinders 1, 2 are formed in the spiral shape, and provided respectively for the cylinders 1, 2 in the fan housing 6. Moreover, air leading initial end parts 9a, 10a of the respective diaphragms 9, 10 are arranged at a phase difference of about 180 deg. to each other. A half of air pressurized by the cooling fan 5 is led to the first cylinder 1 by the diaphragm 9, and the other half is to the second cylinder 2 by the diaphragm 10 equally by this mechanism. |
