Intake and exhaust control systems for engine

摘要

Object To provide intake and exhaust control systems for an engine, which is capable of improving the output performance in a wide operational region from a low speed operational range to a high speed operational range of the engine with a simple structure. Solving Means An intake control valve 35 for changing an intake mode in accordance with an operational state of an engine En is provided in an intake system In of the engine En and an exhaust control valve 55 for changing an exhaust mode in accordance with an operational state of the engine En is provided in an exhaust system Ex of the engine En. A common actuator 71 is connected to the intake control valve 35 and the exhaust control valve 55 via transmission wires 75a to 75c.