不同发动机转矩下限对HEV实际运行的影响  

Influence of different lowest engine torque on practical working of HEV

作　　者：李洋洋[1] 谢金法[1] 张靖龙[1] 

机构地区：[1]河南科技大学车辆与交通工程学院,河南洛阳471000

出　　处：《中国农机化学报》2016年第2期131-135,164,共6页Journal of Chinese Agricultural Mechanization

基　　金：国家自然科学基金项目(60904023)

摘　　要：在发动机的万有特性图上制定一条转矩曲线下限,限定发动机在任何情况下都工作于转矩曲线下限与最大转矩曲线之间的低油耗区域。根据车速大小、soc(蓄电池荷电状态)高低、整车需求转矩大小对发动机与电动机的转矩进行合理分配。基于Matlab/Simulink建立整车后向仿真模型,在NEDC(新欧洲行驶工况)下分别对转矩曲线下限系数为0.7、0.5、0.3时进行仿真。结果显示转矩曲线下限系数为0.7与0.5时发动机主要运行在转矩曲线下限,转矩曲线下限系数为0.3时发动机主要运行在最大转矩曲线。最后经过5×NEDC循环仿真得知转矩曲线下限系数为0.5时的燃油经济最好。The lowest engine torque curve was built on the engine universal characteristics map to restrict engine to work in tne Low 1u- el consumption district between the lowest engine torque curve and the highest engine torque curve in any case. Engine torque and mo- tor torque were distributed reasonably according to velocity, soc and torque requirements. The backward simulation model of vehicle was built based on Matlab/Simulink. Simulations were conducted when the lowest torque curve coefficient were 0.7, 0.5, 0.3 respectively in the NEDC. The engine worked mainly on the lowest torque curve when the lowest torque curve coefficient were 0.7 and 0.5, while, the engine worked mainly on the highest engine torque curve when the lowest torque curve coefficient was 0.3. In the end, fuel economy was tested to be the best when the lowest torque curve coefficient was 0.5 after 5×NEDC simulation.

关 键 词：转矩曲线下限 后向仿真模型 转矩曲线下限系数 燃油经济性 

分 类 号：U461.8[机械工程—车辆工程]