| 摘要 |
A two-stage turbocharged engine system comprises an internal combustion engine 302, a high-pressure turbocharger 306 having a high-pressure turbine 360 and a high-pressure compressor 361; a low-pressure turbocharger 305 having a low-pressure turbine 350 and a low-pressure compressor 351. A low-pressure intake line 381 connects the outlet of low-pressure compressor 351 to the inlet of high-pressure compressor 361 and a high-pressure intake line 382, 383 connects the outlet of high-pressure compressor 361 to an air cooler 106. A bypass device 309 consisting of a short bypass line 391 containing a bypass valve 394 is connected between a first branching point 392 located in the low-pressure intake line 381 to a second branching point 393 located in the high-pressure intake line 382, 383, thereby bypassing the high-pressure compressor 361. In the invention, the bypass device 309 is located closer to the low-pressure compressor 351 than to the high-pressure compressor 361, thereby reducing installation space, eg allowing a second air cooler 400 to be provided in the low-pressure intake line 381.
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