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以能量管理和辅助动力单元(APU)控制为核心的动力控制系统,决定了柴油串联式混合动力客车的燃油经济性和排放性能。通过建立的一套串联式混合动力系统测试平台,以中国客车城区道路循环工况为基准,测试动力系统油耗、发动机排放和蓄电池SOC,以评价能量管理和APU控制性能。结果表明:APU采用前馈+反馈控制,能够完成定转速控制和变转速控制;同时基于模糊规则的能量管理策略在APU变转速控制,SOC为40%时,使得该混合动力系统的经济性比原型车(38 L/100 km)提高20%;采用定转速的APU控制与采用变转速的APU控制相比,油耗增加5.7%,烟度值降低42%,NOx增加4%。
The power control system with energy management and auxiliary power unit (APU) control at its core determines the fuel economy and emission performance of diesel tandem hybrid buses. Based on a series of test system of tandem hybrid system in China, the fuel consumption, engine exhaust and battery SOC of the power system were tested based on the road cycle conditions in the Chinese bus urban area to evaluate the energy management and APU control performance. The results show that the APU adopts the feedforward + feedback control to complete the fixed speed control and the variable speed control. At the same time, the energy management strategy based on the fuzzy rules changes the speed ratio of the APU to 40% SOC, making the economy ratio of the hybrid system Up to 20% increase in prototype (38 L / 100 km); APU control at fixed revolution Fuel consumption increased 5.7%, smoke reduced 42% and NOx increased 4% compared to APU with variable speed.