| 摘要 |
PURPOSE:To prevent an excess air supply at low speed running and a deficient air supply at high speed running by fitting the one side of a duct opening over the exhaust muff of a charging fan casing keeping a fixed gap to the periphery of the exhaust muff. CONSTITUTION:Since an air quantity supplied by a charging fan 1 (a blast quantity owing to the charging fan and a negative pressure in a cylinder) is proportionated to the number of revolution of an internal-combustion engine B, the air is fed by the charging fan 1 into the internal-combustion engine through a duct 15. When the air is excessively supplied, the air supplied by the charging fan 1 gets partially out of an intake and exhaust port 19, and when deficiently supplied, the air is drawn into the duct 15 through the above port 19. |
