摘要
为了改善PHEV在低SOC状态下的保电性能,结合具体工况进行分析,明确造成保电性差的主要原因,一是需求功率较大,而发动机工作转速由于NVH性能要求受限;二是需求功率较低,但发动机未能有效利用时机进行发电。针对特定工况低SOC状态下保电性较差的问题,在原策略的基础上,提出一种基于工况识别的保电策略。通过对行驶工况进行在线辨识,根据识别结果适当放开发动机的发电能力。经过仿真验证,该策略能有效减缓整车在低SOC状态下的掉电速率。与原策略相比,SOC最低值提高7.19%,整车保电性能得到提升。
To improve the charge-saving performance of PHEV under a low SOC state,this paper analyzes the specific driving conditions and identifies the main reasons for the poor charge-saving performance.First,the power demand is high,but the engine speed is limited by NVH requirements.Second,the power demand is low,but the engine fails to effectively use the opportunity to generate electricity.Aiming at specific driving conditions with poor charge-saving performance,a charge-saving strategy based on driving condition recognition is proposed based on the original strategy.According to the online identification result of driving conditions,the limitation of engine generating capacity can be appropriately released.The simulation results show that the strategy proposed can effectively slow down the electricity consumption rate under a low SOC state.Compared with the original strategy,the minimum SOC value is increased by 7.19%.The charge-saving performance of PHEV is improved.
作者
王春生
张佳男
王吉全
WANG Chunsheng;ZHANG Jianan;WANG Jiquan(Product Planning and New Auto Technologies Research Insititute,BYD Auto Industry Co.,Ltd.,Shenzhen 518118,Guangdong,China)
出处
《汽车工程学报》
2023年第4期539-547,共9页
Chinese Journal of Automotive Engineering
关键词
工况识别
插电式混合动力汽车
保电策略
NVH性能
driving condition recognition
plug-in hybrid electric vehicle
charge-saving strategy
NVH performance
