Abstract: Based on the engine efficiency map and battery internal resistance curve, an energy management strategy is proposed for a parallel hybrid electric vehicle (PHEV) with metal v-belt continuously variable transmission (CVT) by using logic threshold approach to control the dynamical transitions between the various operation modes. The torque distribution between engine and motor, and CVT ratio are regulated through predetermined optimal operation lines of hybrid powertrain system in different operations. The simulation results in ADVISOR demonstrate that the energy management strategy can satisfy vehicle dynamic performance and reduce fuel consumption effectively, as well as keep battery state of charge (SOC) in reasonable range.

Key words: Continuously variable transmission, Energy management strategy, Logic threshold method, Parallel hybrid electric vehicle, carbon fabric, composite, epoxy resin, self-lubrication, screw transmission