Control strategies development for a series hydraulic hybrid vehicle based on engine experimental map

Abstract

As a branch of the hydraulic hybrid vehicle (HHV) technology, series hydraulic hybrid vehicle (SHHV) has been an important research object of institutions and automotive manufacturers all over the world. Based on the engine experimental map, several control strategies are developed and applied on the system with an expectation that the engine will be controlled to operate in its optimal operation regions where fuel consumption and emissions of the engine are minimized. Simulation results of the system over the Japan 10-15 driving cycle indicate that the engine can be controlled to follow its optimal BSFC line most of the working times. Those results also represent a significant fuel economy improvement in comparison to the vehicle with standard conventional and hydrostatic transmission systems. With different control strategies, the improvement can be up to 80 % compared with a traditional hydrostatic control strategy and up to 60 % compared with a high-quality standard. © 2013 Springer Science+Business Media New York.