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

Aufladungskonzepte, SPA 10/15, Audi RS 5 TDI Concept Zoom Photo credits:
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The two-level turbocharging of the V6 TDI is complemented by an electronically powered compressor. It sits in the coldest part of the engine, behind the charge-air intercooler and provides a dramatically improves throttle response time. Activation of the charging elements is fully variable, using various bypasses.

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