Turbos, biturbos, triturbos, superchargers and the rest Which engine charging approach is best?

Aufladungskonzepte, SPA 10/15, BMW M550d Zoom Photo credits:
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The trilogy of turbos consists of two compact high pressure chargers with VTG as well as one larger low pressure charger. The chargers are activated in sequence and governed individually by a complicated control system which regulates both exhaust gases as well as the fresh air intake.

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