Comparison of the transient performance of a motorsport ICE first fitted with an e-turbocharger and then with a conventional turbocharger with added P1-hybrid electric machine

This paper discusses ways of deploying electrical machines (EM) on a turbocharged internal combustion engine and assesses their energy effectiveness. Inspired by the 2026 Formula One™ regulations, the simulation software AVL Boost™ is used to investigate the use of an EM attached to the turbocharger rotor (eTC) and that of a powerful EM at the engine crankshaft (MGU-K). Both improve powertrain performance, with the 350kW MGU-K achieving the best transient performance despite its limited impact on the responsiveness of a non-eTC turbocharger (turbo lag), while the eTC yields the best engine efficiency control and is the most energy efficient solution.