Based on the traditional engine mean value model, this paper analyzed the process of the engine coolant temperature change, and established engine transient fuel economy evaluation model which combined the coolant dynamic model with the coolant temperature correction factor model. In this paper, the throttle dynamic coordination control method was used to simulate according to characteristic of hybrid vehicle. The results show that the established model can accurately evaluate the transient fuel economy of hybrid vehicle.%基于传统的发动机均值模型,分析了发动机冷却液温度变化过程,结合冷却液动力学模型和冷却液温度修正因子模型,建立了发动机瞬态燃油经济性评价模型.根据混合动力汽车的特点,结合节气门动态协调控制方法进行了仿真,结果表明,所建模型能够准确地评价混合动力汽车瞬态燃油经济性.
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