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Thanks to you and m444 for clarification. At the risk of quibbling, if it requires extra energy, whether through a drive shaft or a motor, its a kind of supercharger. I could however, imagine exhaust gas driving a generator and charging a battery which then powers a motor that pushes fuel/air. That would be novel.
Originally Posted by Glisse
No, not a supercharger, which is driven off the engine and has parasitic drag.
An electrically driven charger.
All of them improve volumetric efficiency by forcing a denser charge into the cylinder. But no lag, as with a turbo. And no drag, as with a supercharger. Needs a lot of juice though, hence separate 48v subsystem which is powered from lithium battery.
Here's an extract from Audi's technology portal:
Mercedes are working on a similar system to use with their new in-line modular engines.
04-07-2016, 12:02 PM
Charger
