Research on control strategy for parallel hybrid loader

Through the analysis of a five-ton loader working condition characteristics, this paper proposed a parallel hybrid loader structure, studied its parameter matching and put forward a fuzzy logic control strategy for energy saving. The input variables of fuzzy logic controller were system demand torque obtained by online estimation and state of charge of super capacitor. After fuzzy control optimization algorithm, the engine would work smoothly in the high efficiency area and super capacitor would keep balance between charging and discharging. The simulation results showed that the control strategy improved the engine fuel economy and energy saving effect which could save fuel by 7.72% compared with the traditional loader.