The main aim of this paper is to study the potential impacts in hybrid and full electrical vehicles performance\r\nby utilising continuously variable transmissions. This is achieved by two stages. First, for Electrical Vehicles (EVs),\r\nmodelling and analysing the powertrain of a generic electric vehicle is developed using Matlab/Simulink-QSS Toolkit,\r\nwith and without a transmission system of varying levels of complexity. Predicted results are compared for a typical\r\nelectrical vehicle in three cases: without a gearbox, with a Continuously Variable Transmission (CVT), and with a\r\nconventional stepped gearbox. Second, for Hybrid Electrical Vehicles (HEVs), a twin epicyclic power split transmission\r\nmodel is used. Computer programmes for the analysis of epicyclic transmission based on a matrix method are\r\ndeveloped and used. Two vehicle models are built-up; namely: traditional ICE vehicle, and HEV with a twin epicyclic\r\ngearbox. Predictions for both stages are made over the New European Driving Cycle (NEDC).The simulations show\r\nthat the twin epicyclic offers substantial improvements of reduction in energy consumption in HEVs. The results also\r\nshow that it is possible to improve overall performance and energy consumption levels using a continuously variable\r\nratio gearbox in EVs.
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