INTERNAL COMBUSTION ENGINE WITH TWO-STAGE SUPERCHARGING CAPABILITY AND WITH EXHAUST-GAS AFTERTREATMENT ARRANGEMENT, AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF SAID TYPE

摘要

A supercharged internal combustion engine includes at least two exhaust-gas turbochargers arranged in series, wherein a first exhaust-gas turbocharger serves as a low-pressure stage and a second exhaust-gas turbocharger serves as a high-pressure stage. A second turbine of the second exhaust-gas turbocharger may be present upstream of a first turbine of the first exhaust-gas turbocharger, and a second compressor of the second exhaust-gas turbocharger may be arranged in an intake system downstream of a first compressor of the first exhaust-gas turbocharger and a first bypass line may branch off upstream of the second turbine and join back at a junction point between the first turbine and the second turbine.

主权项

1. An engine, comprising:
a first cylinder group connected to a first turbine through a first exhaust line; a second cylinder group connected to a second turbine through a second exhaust line, the second turbine parallel to the first turbine; a first compressor downstream of a second compressor arranged in series along an intake system; and a connecting line connecting the first exhaust line to the second exhaust line.