Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Control Strategy of Fuel Injection Quantity and Common-rail Pressure to Reduce Particulate Matter Emissions in a Transient State of Diesel Engines

승용디젤엔진의 과도구간 입자상물질 저감 및 운전성능 향상을 위한 연료분사량 및 커먼레일압력 제어전략

  • Hong, Seungwoo (Automotive Control & Electronics Laboratory, Hanyang University) ;
  • Jung, Donghyuk (Department of Automotive Engineering, Graduate School, Hanyang University) ;
  • Sunwoo, Myoungho (Department of Automotive Engineering, Hanyang University)
  • 홍승우 (한양대학교 자동차전자제어 연구소) ;
  • 정동혁 (한양대학교 일반대학원 미래자동차공학과) ;
  • 선우명호 (한양대학교 미래자동차공학과)
  • Received : 2015.05.06
  • Accepted : 2015.09.07
  • Published : 2015.11.01
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Abstract

This study proposes a control strategy of the common rail pressure with a fuel injection limitation algorithm to reduce particulate matter (PM) emissions under transient states. The proposed control strategy consists of two parts: injection quantity limitation and rail pressure adaptation. The injection limitation algorithm determines the maximum allowable fuel injection quantity to avoid rich combustion under transient states. The fuel injection quantity is limited by predicting the burned gas rate after combustion; however, the reduced injection quantity leads to deterioration of engine torque. The common rail pressure adaptation strategy is designed to compensate for the reduced engine torque. An increase of the rail pressure under transient states contributes to enhancement of the engine torque as well as reduction of PM emissions by promoting atomization of the injected fuel. The proposed control strategy is validated through engine experiments. The rail pressure adaptation reduced the PM emission by 5-10% and enhanced the engine torque up to 2.5%.

Keywords

References

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