| 摘要 |
An internal combustion engine having a turbocharger is provided. The engine includes a turbine of the turbocharger located in an exhaust system of the engine, an upstream side catalyst located upstream of the turbine, a catalyst bypass passage bypassing the upstream side catalyst, a catalyst bypass passage on/off valve for opening and closing the catalyst bypass passage, and a first exhaust gas recirculation passage for recirculating a part of exhaust gases from a portion between the upstream side catalyst and the turbine to an intake system of the engine. The engine, that further includes a second exhaust gas recirculation passage for recirculating a part of exhaust gases from an upstream side of the upstream side catalyst to the intake system, and a switching valve for switching between the first exhaust recirculation passage and the second exhaust recirculation passage, is provided. |
