杨飞，胡春明，张必军.48 V轻度混合动力系统控制策略的仿真研究[J].内燃机工程,2017,38(6):111-118.
48 V轻度混合动力系统控制策略的仿真研究
Simulative Research of Control Strategy for 48V Mild Hybrid System
DOI：
关键词:48 V系统  起停  制动能量回收  转矩助力
Key Words:48 V system  start-stop  braking energy recovery  torque boost
基金项目:天津市科委科技支撑计划项目（12ZCZDGX03800
作者单位
杨飞，胡春明，张必军 1.天津大学 天津内燃机研究所，天津 300072；2.飞思卡尔半导体中国有限公司，天津 300385 
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摘要:对48 V轻度混合动力系统的控制策略进行了研究，包括智能起停、制动能量回收、转矩助力、电池管理系统。利用整车动力学仿真软件Advisor建立了48 V系统的仿真模型，将仿真结果与12 V起停系统进行对比。结果表明：48 V系统起停功能的节油效果与12V系统相当，新欧洲行驶循环（NEDC）测试循环下节油约为5%；48 V系统采用的12 kW起停电机使得制动能量回收的节油效果更加明显，NEDC工况下48 V系统的总节油率为13%。此外，转矩助力功能可以为汽车提供20～30 N•m的转矩，从而调节电池SOC及优化发动机工作点。
Abstract:The control strategy of 48 V mild hybrid system was researched, including the start-stop, braking energy recovery, torque boost and battery management system. Then, a simulation model for 48 V system was built with the Advisor, a king of vehicle dynamics simulation software. The simulation results were compared with the experiment results of 12 V system. The conclusion is as follows: the 48 V system can get 5% fuel saving in the NEDC test cycle with start-stop, same as 12 V system. Due to use of the 12 kW start-stop motor, the 48 V system can save more fuel with the braking energy recovery, totally getting 13% gasoline saving in the NEDC test cycle. In addition, the torque boost can provide 20 to 30 N•m torque for vehicle, which can regulate the SOC of battery and optimize engine operating points.
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