I wonder if this shares any of the same concept beginnings with the Teledyne electric turbo from a decade ago.
Even better than a supercharger
Audi’s electric turbocharger sits in the induction system, downstream of the conventional turbo and the intercooler and is normally not operative. However, at very low speeds - particularly from standstill - the air charged by the main turbo is re-directed through the electric turbocharger, which is already spinning at high speed, and pushed with much greater force into the engine.
A brief drive of a prototype unit in an Audi A6 showed the electric bi-turbo set-up to be dramatically effective. The torque boost from a standing start with the electric turbo in operation delivers what can probably be described as sub-supercar performance. Audi’s own tests claim that, back-to-back with a conventional V6 TDI, the electric Bi-Turbo car was two car lengths further down the road just three seconds after launch.
Gonna be a tall engine though, and the exhaust manifold goes up to meet the traditi0onal turbo on top of the engine between the two banks. Weird.