Abstract

With the aggravation of the energy crisis, people pay more and more attention to the rational utilization of energy. Thus the construction machinery field has started to take hybrid technology into consideration to save the energy. This paper analyses the working condition of a 5 tons loader and develops the hydraulic parallel hybrid scheme which has little research in the loader field. The system adopts a dynamic rule-based control strategy, which takes the required torque and the SOC value of the accumulator as the input to realize the output torque of the engine and the pump/motor. A power-train model is also developed in the paper. The results show the scheme can reduce the fuel consumption by 13.5% compared to the conventional loaders.

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