| 摘要 |
The task of the present invention is to provide a technology to damp the noise and vibration at the stoppage of an internal combustion engine, in an exhaust purification system having a low-pressure EGR system which recirculates part of exhaust gas flowing downstream of a turbine of a turbocharger into an intake passage upstream of a compressor of the turbocharger. According to the present invention, a first throttle valve 13 is disposed in an intake pipe 9 downstream of a compressor housing 15a. When a request to stop the internal combustion engine 1 is issued, a second throttle valve 10 is opened, then the first throttle valve 13 is closed. |
