| 摘要 |
<p>A valve, which is provided in an exhaust passage of an internal combustion engine to release exhaust, includes a valve seat having an opening opened to the exhaust passage, a valve body having a conical surface or a spherical surface configured to close the opening by coming into contact with the valve seat, a movement unit configured to move the valve body in a direction of intersecting the opening, and an urging unit configured to urge the valve body in the direction of intersecting the opening, and the urging unit controls urging force by the movement unit in a direction of suppressing vibration of the valve body caused by vibration of exhaust pulse frequency determined by a speed of the internal combustion engine and a number of cylinders of the internal combustion engine.</p> |
