液压约束活塞发动机能量平衡分析

Energy Balance Analysis of Hydraulic Confined Piston Engine

液压约束活塞发动机(HCPE)集成传统的内燃机与液压泵为一体,将燃料燃烧产生的热能转换为液压能,是一种新型的柔性动力装置,能量平衡分析是其结构优化设计的重要依据。首先建立了HCPE的动力学模型,仿真分析了HCPE标定工况下能量输入、耗散、分配及输出情况。能量转换中,与燃烧有关的损失占57.65%、摩擦损失占6.24%、液压损失占7.78%、有效功输出占26.87%、其他损失占1.46%。有效功比率随转速或油门开度的增大基本成中凸状。

Hydraulic confined piston engine（HCPE） integrates traditional internal combustion engine and hydraulic pump into one assembly,which can transform the thermal energy from fuel combustion into hydraulic energy,is a new type of flexible power device.The dynamic model of HCPE was constructed firstly,and then the energy input,dissipation,distribution and output under nominal working condition were simulated.During energy transformation,the loss related to combustion is 57.65%,friction related loss is 6.24%,hydraulic system related loss is 7.78%, effective power output is 26.87%,and the other loss is 1.46%.The curve of effective power ratio shows convexity shape along with increase of rotational speed or throttling.