| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve exhaust gas recirculation at a high EGR rate while performing supercharging by a supercharging system, and to ensure intake air volume required for combustion without extremely increasing exhaust pressure. <P>SOLUTION: An exhaust loss recovery device is applied to an engine 1 including the supercharging system and an EGR line 11. The supercharging system is constituted of a low-pressure stage turbocharger 15 and a high-pressure stage turbocharger 14 which functions as a variable nozzle turbocharger, and the EGR line 11 connects between an exhaust manifold 9 and an intake manifold 7 to recirculate a part of exhaust gas 8 as EGR gas 8'. The exhaust loss recovery device includes: an EGR turbocharger 16 driving a turbine 16b by the EGR gas 8', compressing intake air 4 by a compressor 16a, and introducing the compressed intake air to the upstream side of the supercharging system of an intake system; a bypass line 19 bypassing the turbine 16b of the EGR turbocharger and allowing the EGR gas 8' to flow; and a bypass valve 20 opening/closing the bypass line. <P>COPYRIGHT: (C)2013,JPO&INPIT |
