中文摘要：

为了提升气动-内燃混合动力系统的动力、经济和排放性能,充分利用气动发动机排气能量,提出了一种利用气动发动机排气辅助实现内燃机进气增压的方法。基于热力学理论建立了气动-内燃混合动力系统数学模型,并对模型进行了试验验证。利用建立的模型分析了气动发动机排气压力和流量变化规律,分别计算了混合动力系统在定转速和定进气压力工况下的性能。计算结果表明：在定转速工况下,随着气动发动机进气压力升高,内燃机平均指示压力升高,混合动力系统输出功率增加,总能效率比同条件的非增压系统最大提高了11%;在定进气压力工况下,随着混合动力系统转速升高,受循环进气量的影响,混合动力系统功率呈先增加后减小的趋势,总能效率则不断降低,但相比同条件下非增压系统提高了5%~15%;气动-内燃混合动力系统在中、低速时,采用辅助增压效果较好,可提升系统的动力性及经济性。

英文摘要：

To improve performance and fuel economy of the pneumatic-internal combustion hybrid sys- tem, a supercharging way to direct the high pressure exhaust of pneumatic engine into the internal combus- tion engine （ICE） cylinder to fully use pneumatic engine exhaust energy was studied. The pneumatic-internal combustion hybrid system mathematical model was built up based on thermodynamics theory and validated through bench tests. Based on the model, pressure and mass flow rate characteristics of the pneumatic engine exhaust and performance of the hybrid system were analyzed under constant speed and intake pressure condi- tions. Results show that with the pneumatic engine intake pressure rising, both IC engine indicated mean ef- fective pressure and hybrid system power increase, the max. total energy efficiency improves by 11% com- pared to original. Under constant pneumatic engine intake pressure, with speed increasing the hybrid system power increases first reaching a peak value, then decreases due to limitation of the pneumatic engine cyclic in- take air amount and the hybrid system total energy efficiency lower gradually, it is increased by 5%~15% than unsupercharged. It is concluded that the proposed supercharging-aiding measure can improve the hybrid system power and economy in medium and low speed ranges.