Design methodology for a range-extended PHEV

The range-extended PHEV is typically designed to operate in an all-electric mode where the batteries are initially charged from the electric power grid. Unlike the pure EV, the vehicle's range is not limited by the battery capacity as an engine and generator are incorporated to sustain the battery once the state of charge has dropped to a minimal level. The effectiveness of the concept in terms of fuel economy and reduced emissions is dependent upon the optimal selection of components and a control algorithm that is appropriate for a specific drive cycle. A design methodology is presented that first provides guidelines for the development of the VTS and the various trade-offs that must be considered. A rigorous procedure is then presented for the design and later validation of the configuration and control algorithm using hardware-in-the-loop (HIL).