| 摘要 |
The intake and exhaust device equipped with a first valve disk and a second valve disk may include a cylinder in which an intake port and an exhaust port are formed, a circular first valve disk in which a first hole corresponding to one of the intake port and the exhaust port is formed and that covers an upper side of the cylinder including the intake port and the exhaust port, a circular second valve disk that is slidingly overlapped on the first valve disk and in which a second hole corresponding to the first hole is formed, a first driving portion for rotating a first driving pipe, a second driving portion for rotating a second driving pipe, and a control portion for controlling the first driving portion, the second driving portion, the intake port or the exhaust port.
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