The present invention stores the air that has passed through the air cleaner and supplies the volume of the surge tank to the combustion chamber through the intake manifold according to the operating range of the engine, thereby improving responsiveness in the low speed section and improving the distribution in the high speed section. The volumetric air surge tank which can be made, the surge tank through the intake manifold (2) and the inlet port (20a) through which the clean air passing through the air cleaner (12) is introduced and the air entering the inlet (20a) A fixed case 20 having an outlet 20b for supplying to the combustion chamber, a fixed magnet 30 attached to the upper surface of the fixed case 20 by bolts 32, and a lower portion thereof by means of a tension spring 64. It is disposed in a pulled state in the fixed case 20, the upper portion is integrated with the movable case 22 by the movable case 22 and the bolt 52, which is mounted to slide along the upper surface of the fixed case 20; enemy It is selectively inserted between the moving magnet 50 and the fixed magnet 30 and the moving magnet 50 fixed to the upper surface thereof to be moved to adjust the distance between the fixed case 20 and the mobile case 22 The diaphragm 40 is comprised.
展开▼
