A Study about Impact of Battery SOC on Fuel Economy of Conventional Diesel Vehicle

배터리 충전상태가 경유자동차 에너지소비효율에 미치는 영향 연구

  • Received : 2016.04.27
  • Accepted : 2016.05.27
  • Published : 2016.07.01


Manufacturers have been applying several technologies that can improve the fuel economy of their cars. The regulated voltage control(RVC) system, is one of those technologies being used in passenger cars. In RVC, the voltage of an alternator is controlled depending on the electrical load demand or battery SOC, although each manufacturer differs from another in terms of detail. RVC can reduce the load of an alternator by consuming the stored energy of a battery and simultaneously generate energy. In this paper, a diesel passenger car equipped with an RVC system was tested under FTP-75 and HWFET modes to evaluate fuel economy as their initial battery SOC(100, 90, 80 and 60 %). The test results showed that the initial SOC affects fuel economy only under the FTP-75 mode. FTP-75 fuel economy of the 60% SOC was 13.2 % lower than the 100 % SOC. Also, the simultaneous consumption of the two energy sources did not appear in 60 % SOC.


Fuel economy;Battery SOC;BCM;RVC;Electrical load


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Grant : 공해없는 청정교통

Supported by : 교통안전공단