轻度混合动力车发动机Start/Stop系统控制策略  

Control strategy for engine Start/Stop system of mild hybrid electric vehicle

作　　者：陈汉玉[1] 左承基[1] 袁银男[2] 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009 [2]南通大学机械工程学院,南通226019

出　　处：《农业工程学报》2012年第7期97-102,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：校博士学位专项资助基金(2011HGBZ0927);中央高校基本科研业务费专项资金资助(2011HGQC1008);内燃机燃烧学国家重点实验室开放基金项目(K2011-09)

摘　　要：发动机怠速自动起停是轻度混合动力车的重要工作模式,它能避免发动机在怠速工况下运行,可减少燃油消耗及尾气排放。该文对集成起动机/发电机(ISG)轻度混合动力车发动机起动动力学和发动机Start/Stop系统控制策略进行了研究,同时在Matlab/Simulink中建立了整车控制器模型,在NEDC循环工况下对发动机和ISG电机的协调输出转矩进行了仿真分析,最后进行了发动机起动及整车转鼓对比试验。仿真及试验结果表明,Start/Stop系统能保证发动机在怠速工况下正常停机,通过Start/Stop系统的协调控制,发动机在整个循环工况下运转平稳,转矩输出值在低油耗区;和传统车相比,加装Start/Stop系统的轻度混合动力车HC和CO排放下降明显,百公里油耗由8.60L下降到7.30L,节油效果显著。The behavior of engine automatic start and stop under idle speed is an important working mode for a mild hybrid electric vehicle（HEV）,which can avoid engine running under idle operating mode.So it can reduce engine fuel consumption and exhaust gas emission.The engine start dynamics and the control strategy of start/stop system for ISG（integrated starter/generator）mild HEV were studied.The hybrid controller unit（HCU）model was built in Matlab/Simulink environment,and the coordinated output torque between engine and ISG motor was simulated in the NEDC driving cycle.Finally the engine start and the drum contrasted test were carried out.The simulation and test results showed that the start/stop system could ensure the engine stop normally under idle operating mode.With the start/stop system coordinated control,the engine run smoothly in the whole driving cycle,and the output torque was always in the low fuel consumption area.The HC and CO emissions of HEV equipped with start/stop system declined obviously compared to the traditional vehicle.The 100-kilometer fuel consumption dropped from 8.60 liter to 7.30 liter,and the fuel saving effect was remarkable.

关 键 词：仿真 试验 控制系统 混合动力汽车 起停系统 

分 类 号：U469.79[机械工程—车辆工程]