| 摘要 |
A uniflow scavenging 2-cycle engine (100) includes a cylinder (110) having a combustion chamber formed therein, a piston which slides in the cylinder, an exhaust port (118) provided at one end of the cylinder in a stroke direction of the piston, a first exhaust valve (124) which opens and closes the exhaust port, an exhaust passage (136) communicating with the exhaust port and through which an exhaust gas generated due to a combustion operation in the cylinder is guided from the exhaust port, a second exhaust valve (144) provided in the exhaust passage and which varies a degree of opening of the exhaust passage, and a control unit which controls the first exhaust valve and the second exhaust valve to reduce a degree of opening of the second exhaust valve after the first exhaust valve is opened. |
