Technical Paper
Numerical Analysis of Electrically Assisted Turbocharger Application on Hybrid Vehicle
2021-09-16
2021-01-5090
Despite the continuous efficiency increase, traditional vehicles still dissipate large amounts of energy. While actual hybrid powertrains allow to recover kinetic energy during the braking phases, exhaust gas energy can be recovered through the electric turbo compound (ETC). A turbocharger (TC) match with an electric machine (EM) appears to be the best solution for passenger cars since it also permits turbo lag reduction with restricted system complexity increase. The goal of this paper is to investigate the TC electrification impact on fuel consumption, considering transient behavior during a whole drive cycle simulation. This is obtained coupling a detailed one-dimensional (1-D) engine model with vehicle dynamics and signal processing by means of sole GT-Suite software. A baseline engine refers to a 1.3 L, SI, 3-cylinder turbocharged engine while a class C vehicle is modelled.