| 摘要 |
PURPOSE:To increase the freedom for arranging an exhaust pipe and to simplify the driving mechanism by arranging the exhaust pipes of a multi-cylinder engine in parallel for every cylinder while arranging the shafts of valves provided for respective exhaust pipes in parallel and providing a transmission mechanism between respective valve shafts. CONSTITUTION:The exhaust pipes 16a-16d of a multi-cylinder engine are arranged independently for every cylinder and an exhaust valve 18 is provided for every exhaust pipe. The shafts of valves for the exhaust pipes 16a, 16b and 16c, 16d are shifted each other and a transmission mechanism A is provided between both valves. Furthermore, a drive section 46 comprising an actuator 50 which is driven by means of a controller 54 for producing an output corresponding to the rotation 52 is provided at the end of the valve shaft. Since a valve shaft is provided independently for every exhaust pipe, the freedom for arranging the exhaust pipe is increased, while since a single drive section 46 opens/closes all valves, the driving mechanism is simplified.
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