AN EFFICIENT ENERGY MANAGEMENT STRATEGY, UNIQUE POWER SPLIT & ENERGY DISTRIBUTION, BASED ON CALCULATED VEHICLE ROAD LOADS

This paper presents energy management strategy that includes a novel power split and optimization approach for the FED BRAVO program. AVL is responsible for developing and delivering the full hybrid propulsion system integrated into the Fuel Efficient Demonstrator (FED) Bravo vehicle, designed by PRIMUS. The developed energy management algorithm calculates component energy availability, driver demanded torque and manages the distribution of power between propulsion components. This includes a real-time, road load calculated power split between the three propulsion sources, namely Internal Combustion Engine (ICE), Integrated Starter Generator (ISG) and Front Motor (FMOT). Additionally, unique challenges of power split arose between the different propulsion sources due to the particular powertrain architecture selected for this vehicle i.e. a combined through the road and parallel hybrid structure. Specifically, the paper will discuss via case study the road load based power split and optimization methodology employed by AVL Powertrain and implemented on the FED BRAVO.