针对单级储能的气动-内燃混合动力发动机能量回收效果随储气罐压力增高而降低的问题,将双储气罐储能的技术方案应用到气动-内燃混合动力发动机中,初步得出了双储气罐储能系统可以通过改变进气压力来提高能量转化率COP(coefficient of per-formance)的观点.基于变质量热力学理论建立了压缩空气循环数学模型,并通过台架试验进行了初步验证.通过对模型进行稳态仿真,分析了进气压力、储气罐压力对压缩制动过程的影响.研究结果表明,进气压力与储气罐压力的变化对每循环回收气体质量的影响呈线性;储气罐压力与进气压力的比值是影响制动能量转化率的关键因素,能量转化率(COP)随储气罐压力与进气压力比值的升高而降低.%Aiming at the problem that the energy recovery effect of hybrid pneumatic engine based on single stage energy storage system de-creased with the increase of the pressure of the air tank, double stage energy storage system was used into hybrid pneumatic engine, the view-point that the COP ( coefficient of performance) could be improved by changing the inlet pressure was drawn preliminary. Based on the theory of variable mass thermodynamics, a mathematical model of compressed air circulation which was verified by testbed was established. Through the steady state simulation of the model, the influence of inlet pressure and air tank pressure on compressing braking process were obtained. The results indicate that the change of inlet pressure and the air tank pressure affect the quality of the recycled compressed air per circulation linearly. the ratio of air tank pressure and inlet pressure is a key factor affecting the COP which will decrease when the ratio increases.
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