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为提高汽车起动发电一体机(integrated starter and generator,ISG)高度混合动力汽车(full hybrid electricvehicle,FHEV)能量管理系统效率,首先采用插值法和最小二乘法拟合,得到发动机和电机稳态运行效率图.然后,通过建立电池开路电压模型对充电状态(state of charge,SOC)值进行估计,设计了简化的能量平衡控制策略.在此基础上,以优化发动机效率、提高电池充放电效率为依据设计了改进能量管理策略.最后,在高级车辆仿真器(ADVISOR)中建立了驱动系统和控制策略的仿真模型.仿真结果表明,改进能量管理策略能使发动机工作在优化(optimum,Opt)曲线上,电池充放电效率得到进一步提高,与传统双轴连接型并联式混合动力汽车(parallelhybrid electric vehicle,PHEV)相比,在ECE EUDC(economic commission of Europe-extra urban driving cycle)路况下,百公里耗油量减少了10.1%,发动机效率提高了9.5%,电机总效率提高了11.5%.
In order to improve the efficiency of the integrated starter and generator (ISG) energy management system of full hybrid electric vehicle (FHEV), interpolation and least-square fitting were first used to obtain the steady state operating efficiency of the engine and the motor Then, a simplified energy balance control strategy is designed by establishing the battery open-circuit voltage model to estimate the state of charge (SOC) value.On the basis of this, the optimization of engine efficiency and battery charging and discharging efficiency are based on Designed an improved energy management strategy.Finally, a simulation model of driving system and control strategy was established in Advanced Vehicle Simulator (ADVISOR) .The simulation results show that the improved energy management strategy can make the engine work on the optimum curve , The battery charge-discharge efficiency is further improved. Compared with the conventional parallelhybrid electric vehicle (PHEV), under the condition of ECE EUDC (economic commission of Europe-extra urban driving cycle), the consumption of 100 km 10.1% less fuel, 9.5% more engine efficiency and 11.5% more overall motor efficiency.