Investigation on the Optimal Energy Recovery System for the Military Hybrid Vehicle Based upon the Comprehensive Evaluation Method

Abstract

Energy recovery system is considered as the critical component of the novel hybrid vehicle. For the purpose of satisfying the special requirements of military hybrid vehicle, the investigation on the optimal energy recovery system was conducted based upon the comprehensive evaluation method. The investigated energy recovery system included the hybrid electric energy recovery system, the hydraulic hybrid energy recovery system, the high-speed flywheel energy recovery system, the flywheel and hydraulic mixed energy recovery system, and the battery and super capacitor mixed energy recovery system. In the comprehensive evaluation method, the studied parameters consisted of the energy control strategy, energy density, power density, fuel economy, recovery efficiency, seismic capacity, security, economic cost, requirements of working condition, system stability, and the maintainability. Through comprehensive considerations of the characteristics of energy recovery and the requirements of military hybrid vehicle, the weights of each parameter in the comprehensive evaluation method were established by the questionnaires. Meanwhile, through the questionnaires to the experts in the field of energy recovery system, scales of each parameter in the five energy recovery systems were obtained. It could be judged from final scales of the five systems that the hydraulic hybrid energy recovery system was the optimal option for the military hybrid vehicle. Development of the hydraulic hybrid energy recovery system would promote the entire performance of the military hybrid vehicle.