| 摘要 |
PURPOSE:To aim at improvements in output of power over a wide range, by making a main exhaust port and two auxiliary exhaust ports at both sides of the former open to a two-cycle engine separately, while installing a valve, which regulates the interconnection between a expansion chamber and these main and auxiliary exhaust ports, and controlling the valve according to an engine speed. CONSTITUTION:A main exhaust port 15 and two auxiliary exhaust ports at both sides of the former are made open to a cylinder 10 of a two-cycle engine separately, while each of regulating valves 18 and 19 are installed in position between these exhaust ports 15 and 16 and an expansion chamber 21. These valves 18 and 19 make the main exhaust port 15 and the expansion chamber 21 get them interconnected in time of low speed in the engine, and in proportion as it comes to high speed, the expansion chamber 21 is gradually closing to the main exhaust port 15, while the auxiliary one 16 is controlled so as to open by degrees instead. |
