| 摘要 |
PURPOSE:To lengthen a practical flow passage by controlling an actuator so that a blade, which is provided so that air flow may become spiral flow at the entrance of an air intake pipe, may have the specified angle in the engine low speed area. CONSTITUTION:A movable blade mechanism 32 is provided. This mechanism 32 can vary the angle of a blade to the center line of an air intake pipe 31 so that the air flow in the air intake pipe 31 at the entrance of the air intake pipe 31. A control means 34 is provided. This control means 34 controls an actuator 33 so that the blade may have the specified angle in the low speed area of an engine. Since owing to this constitution, the practical length of the air intake pipe 31 is lengthened, synchronizing engine speed of air intake inertia sifts to the lower speed area side resulting in the improvement of air charge rate. |
