插电式混合动力汽车低SOC能量流试验研究

为制定最优的能量分配策略,对某款插电式混合动力汽车在不同运行工况下的能量流进行分析。通过试验测试了低SOC状态下整车部件能量传递的相关参数,包括:温度、压力、转矩、转速和流量等,之后计算和分析整车的能量分布,并对比了NEDC和WLTC工况下整车能量流向和能量回收率。结果表明,在电池处于低SOC时,WLTC工况下的发动机平均油耗是NEDC工况平均油耗的1.6倍左右;且两种工况下车辆行驶所消耗的能量绝大部分来自于发动机;另外,WLTC工况行驶能量低于NEDC工况,其差值不足1%,但WLTC工况的能量回收率低于NEDC工况,其差值达2.31%。

Experimental Study on Energy Flow in a Plug-inHybrid Electric Vehicle at Low Battery SOC

In order to formulate the optimal energy allocation strategy,the energy flow of a plug-in hybrid electric vehicle in different operation conditions are analyzed.The related parameters of the energy transfer between vehicle components including temperature,pressure,torque,rotating speed and flow rate at low-SOC states are measured by tests,the energy distribution of vehicle is calculated and analyzed,and the energy flow and energy recovery rate under new European driving cycle(NEDC)and worldwide harmonized light vehicles test cycle(WLTC)are compared.The results show that when battery SOC is low,the average fuel consumption of engine under WLTC cycle is about 1.6 times of that under NEDC cycle and the most energy consumed in vehicle driving under both cycles comes from engine.In addition,the energy consumed in driving under WLTC cycle is less than that under NEDC cycle with a difference smaller than 1%,while the energy recovery rate under WLTC cycle is lower than that under NEDC cycle with a little more difference of 2.31%.