| 摘要 |
PURPOSE:To supply to an engine a sufficient amount of air to burn completely fuel by sending extremely low pressure air added to air sucked by negative pressure in a cylinder with a motor intake fan 1. CONSTITUTION:When an impeller 5 is stopped in starting, only air flows into an engine due to negative pressure in a cylinder. When the rotational frequency of the engine exceeds 700rpm, the impeller 5 is rotated so that extremely low pressure air added to intake air sucked by the negative pressure in the cylinder is sent from an air supply fan 1 to an air cleaner 17. When the rotational frequency exceeds slightly 700rpm, necessary amount of air is still small so that a surplus air phenomenon tends to take place. However, a draft from the air supply fan 1 escapes from an intake-exhaust port 19 to the outside to prevent the excess of air. In the high speed rotation, air is sent from the intake-exhaust port 19 to a dust 15 by the negative pressure in the cylinder rather than the air supply fan 1. |
