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    • Study on Increasing Exhaust Temperature by Using 48V Belt-Driven Starter Generator
    DOI：10.13949/j.cnki.nrjgc.2021.06.003
    Key Words:belt-driven starter generator(BSG)  engine  exhaust temperature  selective catalyst reduction（SCR）  light-off temperature
    Author NameAffiliation
    SUN Shanfeng, XIE Hui, GENG Zongqi, ZUO Lan, CHEN Xiumei 1.State Key Laboratory of Engines， Tianjin University， Tianjin 300072, China
     
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    Abstract:Based on the starter and generator function of 48V belt-driven starter generator(BSG), the generator function of BSG system was used to increasing engine exhaust temperature during world light-duty test cycle(WLTC). The engine exhaust temperature was increased by increasing the overall engine power while maintaining the same crankshaft output torque. By using the starter function, the engine could be shut off during idle period to keep after-treatment system warm. Finally, the time to reach the temperature of selective catalyst reduction lighting-off was shortened from 780s to 650s, and the timing of urea injection was 130s ahead. Meanwhile, the overall fuel consumption of WLTC was reduced by 2.4% with a slight decrease of state of charge.
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