| 摘要 |
PURPOSE:To enable the length of an air intake passage to be varied over a wide range by partitioning a surge tank into an inner space and extended parts and rotating a rotary partition member, which connects both parts through a connecting port. CONSTITUTION:Air sucked in from an air cleaner is introduced into a surge tank 6 through an air flow meter and a throttle valve. Then, the air is sucked into each cylinder 9 through each branch passage 10 and intake port 8. When the number of revolution of an engine 1 is low, the connecting part between the inner space 16 and each of the extension parts 13 of the surge tank 6 is positioned at B. When the number of revolution is increased causing a rotary partition member 15 to rotate in the direction of (a), the connecting part is also rotated in the direction of (a), being positioned at B' at the highest condition. |
