| 摘要 |
A two-stroke-cycle engine is provided with a main exhaust port and a pair of auxiliary exhaust ports and includes a main exhaust valve unit slidably disposed to the main exhaust port for controlling an upper edge position of the main exhaust port and a pair of right and left auxiliary exhaust valve units disposed rotatably for opening and closing right and left auxiliary exhaust passages formed to right and left sides of a main exhaust passage formed to the engine. An exhaust controller of the engine is characterized in that a driving unit is connected to the main exhaust valve unit and the right and left auxiliary exhaust valve units are coupled with an end of the main exhaust valve unit on the main exhaust port side through a coupling pin so as to be operatively associated with the main exhaust valve unit, the right and left auxiliary exhaust valve units being disposed symmetrically with respect to the main exhaust valve unit./!
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