| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the manufacturing costs of an air take in pipe structure by permitting the interchange of air take in communication pipes with or without a partition therein for longitudinally dividing the inside thereof into two sections to dispense with the setting operation in length and the like of the air take in communication pipe. SOLUTION: In an air take in communication pipe structure, low-speed and high-speed settings are switched to each other by interchanging air take in communication pipes 3A and 3B between an air take in manifold and an air duct 4, reversing an air take in communication pipe for its inlet and outlet ends to change the position of its communication part, or attaching or detaching a communication tube 12 to or from disposed air take in communication pipes 10 and 11. In another air take in communication structure having an air take in manifold, a communication hole is provided through a partition. In the arrangements, a resonance supercharging air take in pipe structure corresponding to a set engine speed range is provided at low costs and a sealed resonance supercharging effect can be obtained in the overall engine speed range without a remarkable reduction in its air take in pressure.</p> |
