This is very different than the systems used in an F1 car. Mercedes' innovation of splitting the hod/cold parts of the turbo was ingenious, but it really has no

This is very different than the systems used in an F1 car. Mercedes' innovation of splitting the hod/cold parts of the turbo was ingenious, but it really has nothing to do with Volvo's system. In an F1 car, the system is far more advanced. The MGU-H is a combination motor/generator that is attached to the primary shaft of the single turbocharger used in the F1 engine system. This is the most direct way to use electric power to assist in turbocharging, but my understanding is that the MGU-H involves some pretty exotic construction in order to withstand the environment in which it operates. Basically, they're far to expensive to use in a road car. Volvo's system is entirely different. Volvo uses two normal turbochargers that are attached to the engine's exhaust, just like you'd normally expect. Based on the descriptions I've read, and details aren't exactly bountiful, the Volvo system actually uses the electric supercharger to force air in to the turbine side of the turbochargers, not the compressor as I originally expected. This is in stark contrast to the F1 system where the electric motor/generator is an integral part of the actual turbocharger. I'm pretty puzzled by Volvo's system. I would have expected them to use the electric supercharger to generate intake pressure directly, which would require the e-supercharger to be plumbed in to the compressor circuit of the turbochargers. The problem with this setup would be that it would create back pressure on the compressors attached to the turbochargers, which isn't optimal. It's not the end of the world, but it's counter productive, so Volvo's approach is pretty inventive. I wonder how efficient it will be though. They're literally going to use an e-supercharger to drive the turbochargers through the exhaust circuit. Pretty nutty, but I like it!