| 摘要 |
PURPOSE:To realize efficient EGR without making a compressor of a first turbosupercharger dirty due to exhaust gas by providing the compressor for intaking and compressing only exhaust gas, and merging together the compressed exhaust gas for EGR in an air supply tube of a first exhaust turbosupercharger for supercharging an engine. CONSTITUTION:In an exhaust high pressure device provided with a first exhaust turbosupercharger 40 for supercharging an engine, a second exhaust turbosupercharger 60 exclusive to EGR is disposed. A blower 61 of the second exhaust turbosupercharger is connected on an intake side thereof to a common exhaust tube 33. A discharge tube 70 is connected to an air supply tube 12 of an engine disposed on a discharge side of the blower of the first turbosupercharger, thus carrying out EGR. |
