| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a two-stage supercharging system capable of reliably suppressing maximum in-cylinder pressure of each cylinder of an engine to a limited value or below and allowing exhaust to be recirculated favorably, while suppressing efficiency reduction as far as possible. <P>SOLUTION: The two-stage supercharging system includes a high-pressure stage turbocharger 6 for operating a high-pressure stage turbine 3 by exhaust G sent from an engine 1 and feeding suction air A compressed by a high-pressure stage compressor 4 to the engine 1, and a low-pressure stage turbocharger 10 for operating a low-pressure stage turbine 8 by exhaust sent from the high-pressure stage turbine 3 of the high-pressure stage turbocharger 6 and feeding the suction air A compressed by a low-pressure stage compressor 9 to the high-pressure stage compressor 4, and includes a bypass flow path 17 for extracting a part of the suction air A from an output side of the high-pressure stage compressor 4 to introduce it to an output side of the high-pressure stage turbine 3, and a bypass valve 18 provided in the middle of the bypass flow path 17 to open/close the flow path. <P>COPYRIGHT: (C)2012,JPO&INPIT |
