| 摘要 |
PURPOSE:To provide an exhaust gas refluxing device for a diesel engine having a supercharger by which exhaust gas can be refluxed at comparatively low temperature and the supercharger is not damaged by an exhaust particulate or the like. CONSTITUTION:Exhaust gas is sucked and pressurized by an exhaust gas refluxing air sending device 15 from the downstream side of a noise eliminator 22 arranged in an exhaust system of a diesel engine 1 having a supercharger, and is refluxed to an intake air system of the engine through an exhaust gas refluxing valve 26, and the air sending device 15 and the exhaust gas refluxing valve 26 are controlled by a control device 27 according to an operating condition of the engine 1, and thereby, even if the engine is supercharged, reflux of exhaust gas is not hindered, and the possibility of damaging the supercharger by an exhaust particulate or the like is not caused. Since the exhaust gas is also purified at a low temperature by sucking the exhaust gas from behind the noise eliminator, a change in pressure is hardly caused, so that influence exerted on air supply is small. The reflux of exhaust gas optimum for the engine is performed by the control device. |
