Quote:
Originally Posted by cRiPpLe_rOoStEr
Finding a safe way to decouple the compressor is the most challenging. Maybe instead of decoupling the compressor, it's still easier to divert the exhaust flow to another turbine connected to a generator, in a way somewhat similar to those twin-stage turbocharging setups.
To some extent it could help while cruising, but not all the time. At least not for most engines developed around the downsizing trend.
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Yea I think the easier way is to have the turbine spinning a generator, and then the compressor separately powered. Of course, that means more parts and more money.
I apologize, you're right, on throttle-less engines and high-volume EGR engines operating at medium load, light boost can possibly be beneficial for efficiency, but the compressor itself would probably be operating inefficiently at part throttle.