Patent ID: 8302392

Claim:
An exhaust control device in an engine of a vehicle, comprising: a cylinder head, an exhaust side connection pipe having a bent portion formed integrally with the cylinder head, an exhaust valve provided in a portion of the cylinder head facing combustion chamber, an exhaust valve port provided in a portion of the cylinder head facing a combustion chamber, the exhaust valve port being openable and closable by an exhaust valve, an exhaust control valve having a columnar-shaped valve body provided in the bent portion of the exhaust side connection pipe, wherein the exhaust control valve is formed with a passage portion which cuts away a portion of the valve body, and which constitutes part of the exhaust side connection pipe when the exhaust control valve is rotated to a fully open position, wherein when the exhaust control valve is rotated to a fully open position, the exhaust control valve is continuously flush with an inner surface of the bent portion of the exhaust side connection pipe, and when the exhaust control valve is rotated to a closed position, a portion of an external surface of the valve body protrudes from the inner surface of the bent portion of the exhaust side connection pipe, whereby the exhaust side connection pipe is partially closed.