摘要
提出一种新型的混联式混合动力系统,该系统采用双电机结构,由大功率的主驱电机代替变速箱实现无级变速。对于客车不同行驶工况的需求,通过整车控制单元改变自动离合器的开合状态,从而实现混合动力系统在串联和并联2种结构间的转换。根据混联式系统的特点,建立了基于模糊逻辑控制的能量分配策略,该策略以油门或制动踏板行程、主减速器输入端转速和电池荷电状态(SOC)为输入来确定发动机和电机的输出转矩。仿真结果表明:模糊逻辑控制比逻辑门限值控制更加适用于混联系统复杂的能量流;和串联或并联系统相比,该无级变速混联系统在降低客车的燃油消耗方面具有明显的优势。
A new series-parallel hybrid system was put forward, which adopted structure of double motors and realized variable transmission by the high-power drive motor replacing the original transmission box. By the different demands of bus under driving cycles, the conversion of series structure and parallel structure was realized by the changing state of automatic clutch for bus control element. Based on fuzzy logic control, energy assignment strategy was established which took the travel of acceleration or braking pedal, the rotary speed of final drive and the SOC of battery as inputs to determine the output torques of internal combustion engine and motors. Simulation results show that the fuzzy logic control is more suitable for the complicated energy flows of series-parallel system than logic control. Compared with series system or parallel system, the series-parallel hybrid system with variable transmission has obvious advantage of reducing fuel consumption.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2008年第5期115-120,共6页
China Journal of Highway and Transport
基金
国家重点基础研究发展计划("九七三"计划)项目(2007CB209707)
关键词
汽车工程
混合动力客车
模糊逻辑控制
能量分配
混联系统
无级变速
automotive engineering
hybrid bus
fuzzy logic control
energy assignment
seriesparallel hybrid system
variable transmission
