Modeling and control for the Toyota Prius under consideration of emissions reduction

The Toyota Prius equipped with a combustion engine and two electric machines is a power-split hybrid electric vehicle. This hybrid electric vehicle uses a power-split planetary gear system to combine the benefits of series and parallel hybrid vehicles. This paper develops a dynamic model and then we apply it for the optimal control development. Dynamic Programming (DP) is utilized to minimize a combination of fuel consumption and selected emission species over a given driving cycle. A trade-off study between fuel economy and emissions was performed compared to the simulation results performed in ADVISOR. It was found that significant emission reduction could be achieved at the cost of just a small increase in fuel consumption.