Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Cylinder Pressure based Real-Time IMEP Estimation of Diesel Engines

실린더 압력을 이용한 디젤엔진의 실시간 IMEP 추정

  • Kim, Do-Hwa (Gasoline Engine R&D Team, Hyundai-KIA Motor Company) ;
  • Oh, Byoung-Gul (Department of Automotive Engineering, Graduate School, Hanyang University) ;
  • Ok, Seung-Suk (Department of Automotive Engineering, Graduate School, Hanyang University) ;
  • Lee, Kang-Yoon (Automotive Control & Electronics Laboratory, Hanyang University) ;
  • SunWoo, Myoung-Ho (Department of Automotive Engineering, Hanyang University)
  • Published : 2009.03.01
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Abstract

Calculation of indicated mean effective pressure(IMEP) requires high cylinder pressure sampling rate and heavy computational load. Because of that, it is difficult to implement in a conventional electronic control unit. In this paper, a cylinder pressure based real-time IMEP estimation method is proposed for controller implementation. Crank angle at 10-bar difference pressure($CA_{DP10}$) and cylinder pressure difference between $60^{\circ}$ ATDC and $60^{\circ}$ BTDC($DP_{deg}$) are used for IMEP estimation. These pressure variables can represent effectively start of combustion(SOC) and fuel injection quantity respectively. The proposed IMEP estimation method is validated by transient engine operation using a common-rail direct injection diesel engine.

Keywords

References

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