| 摘要 |
PURPOSE:To prevent a decrease in inertia supercharging, by opening and closing a communication valve, provided in supply paths of exhaust gas recirculation (EGR) or secondary air to each intake passage, interlocking to the opening and closing operation of a valve, which communicates with each intake passage when an engine is in high speed operation, in the case of the engine equipped with the independent intake passage in cylinder groups with the intake order not continuing. CONSTITUTION:An engine provides each cylinder of cylinder groups 31, 32 with the intake order not continuing to communicate with each surge tank 71, 72 by intake pipes 61-66 while the upstream of each surge tank 71-72 to communicate with an intake pipe 9 through resonance pipes 81, 82 equipped with throttle valves 101, 102. Exhaust gas or secondary air is supplied to each surge tank 71, 72 through pipes 14, 16, 171, 172 equipped with control valves 13, 15. When the engine is in operation at a low speed, the engine, simultaneously closing a valve 18 of a communication pipe with said pipe 171 and 172 when a valve 12 in a communication pipe 11 with the surge tank 71 and 72 is closed by an actuator 19, prevents damping of an intake pulsation while a decrease of inertia supercharging.
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