行星混联混合动力汽车节油因素分析

为分析行星混联系统的节油因素，建立了基于系统能量流动的理论油耗模型和节油量、节油率模型.在此基础上基于超级电容和行星混联系统的特点，探究发动机平均燃油消耗率、两电机效率、传动系机械效率在影响节油率方面的耦合关系，从解耦的角度定量分析各因素分别优化时对节油率直接或间接的影响及影响原理.明确了行星混联系统节油的根本途径和各因素对节油的贡献大小，提高混合动力汽车经济性优化的效率. 

Analysis on Fuel-Saving Factors of Planetary Hybrid Electric Vehicles

On the base of the internal energy flow of the planetary hybrid system, a theoretical fuel consumption model, a fuel saving model, and a fuel-saving rate model were established to meet the requirement of the fuel saving factor analysis. According to the characteristics of super-capacitor and planetary hybrid system, the coupling relationship among the average fuel consumption rate, the efficiency of each motor and the mechanical efficiency was explored. The quantitative analysis on the direct or indirect effects of the factors on the fuel-saving rate and the principles were presented by decoupling each factor. Results of these analyses clarify the fundamental approaches to saving fuel in the planetary hybrid system and the contribution of each factor to fuel economy, which shows the key points and directions for the depth-saving of hybrid system, and provides great guiding significance for improving the efficiency of the economic optimization of hybrid vehicles.