A Novel Equivalent Consumption Minimisation Strategy for a Series Hybrid Electric Vehicle

In this paper, a novel Equivalent Consumption Minimization Strategy (ECMS) is developed for a series hybrid powertrain system, based on the flow of energy through energy sources and components. The performance of the controller is assessed using both urban and highway drive cycles, through comparing results for the series hybrid powertrain system against a comparable conventional powertrain. Fuel economy improvements are achieved by effectively optimizing the distribution of the power generation within the power sources of the system and by promoting battery charging during low-power demand conditions. The simulation results show that the proposed ECMS provides a substantial improvement to fuel economy and energy consumption of a series hybrid electric vehicle, whilst effectively managing battery state of charge.