| 摘要 |
PURPOSE:To improve the output of an engine by simple constitution without causing any necessity for a supercharger or the like, by propagating a compression wave, generated when intake ports in one cylinder are opened,and a secondary pulsating wave, generated due to a start of intake, to intake ports immediately before their full closing in the other cylinder when the two-cylinder engine of side intake port type is driven at a high speed. CONSTITUTION:When an engine is driven at a high speed, a compression wave, generated in a passage 18b when intake ports 3a, 3b of, for instance, a cylinder 1B are opened, is propagated to intake ports 3a, 3b immediately before their full closing and operated with a 180 deg. phase difference in a cylinder 1A via a passage in an accurate length between the intake ports of the both cylinders. Simultaneously, an expansion wave, generated in a passage 18a due to a start of intake of the cylinder 1A, is propagated to the intake ports 3a, 3b immediately before their full closing in the cylinder 1A by repeating inversion and reflection through a passage in an adequate length between the intake ports and an expansion chamber 23. Similarly, a compression wave, generated in the cylinder 1A, and a secondary pulsating wave, generated in the cylinder 1B by its own action, are propagated to also the cylinder 1B, and a supercharge is performed, thus capable of simplifying construction of the engine. |
