Comparative study of different electric vehicle configurations in terms of energy consumption

Abstract

In order to respect the new fleet-wide average emission regulations, recent studies show that car manufacturers produce an increased number of electric vehicles.For improving the dynamic performances of an electric vehicle while maintaining a low energy consumption, different solutions are used, such as the multi-speed transmission, or the continuously variable transmission (CVT). Another solution more advantageous than other EV typologies consists of a dual motor two speed direct drive, that implies each motor being connected with the final drive through a separate gear. The aim of this paper is to analyse the energy consumption and the overall transmission performance in different test cycles for a middle class with different configurations. The study was carried out by developing a model in a performant simulation environment. The obtained simulation results from the chosen configuration are compared in different test cycles in terms of energy consumption ratio (ECR) and vehicle speed fluctuation (VSF) with the ones from a direct drive EV and a two-gear transmission EV.