| 摘要 |
PURPOSE:To eliminate the resonance effect except an intake resonance synchro- rotation range by mutually communicating independent intake passages with communication passages, and mutually connecting the respective communication passages corresponding to respective cylinders via an opening and closing valve. CONSTITUTION:In a V type six-cylinder engine 1, cylinders 3a, 3b are constituted at cylinders 2a, 2c, 2e, and 2b, 2d, 2f which are not close to each other in ignition order. Respective independent intake passages 5a, 5b which are communicated with the cylinders 2a, 2c, 2e and 2b, 2d, 2f of the cylinders 3a, 3b are communicated mutually by communication passages 14a, 14b. The communication passages 14a, 14b which correspond to respective cylinders 3a, 3b are connected by means of a connection passage 15 which opens and closes by an opening and closing valve V2. Consequently, a connection passage length L2 is shorter than the shortest length between the cylinder, and torque decrease by intake resonance effect except a resonance synchro-rotation range of an engine 1 is effectively eliminated. Intake air is thereby supercharged by only inertia effect so as to obtain torque improvement effect surely.
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