Device for supercharging intake air of internal combustion engine e.g. diesel type compression ignition engine, has drive stage comprising turbines whose movement drive shafts are connected to compressor by speed variation device

摘要

The device has a turbo compressor (10) comprising a compression stage (12) with a compressor (18), where a drive stage (14) drives the compression stage. A control unit (16) controls circulation of exhaust gas through the drive stage. The drive stage comprises two turbines (26, 28) whose movement drive shafts (52, 54) are connected to the compressor by a speed variation device. The speed variation device has a planetary gear set (56) comprising a planet carrier (58) fixedly connected to one of the movement drive shafts.