Development of the combustion noise index and control algorithm through signal processing of in-cylinder pressure for a diesel engine

연소압력 신호처리를 통한 디젤엔진 연소음 지수 및 제어 알고리듬 개발

Jin, Jaemin;Lee, Dongchul;Jung, Insoo

  • Received : 2016.04.29
  • Accepted : 2016.05.20
  • Published : 2016.05.31


To control and improve a combustion behavior of an engine, various studies for the in-cylinder pressure have been consistently carried out. In this paper, the level of the combustion noise for a diesel engine is estimated from the in-cylinder pressure and defined as the combustion noise index. The combustion noise index is calculated from the FFT(Fast Fourier Transform) of the in-cylinder pressure and its validity is verified. The control system based on the combustion noise index is developed and implemented in a vehicle. A number of injection parameters are controlled to meet the desired combustion noise index, and the combustion noise of a vehicle is improved up to 4.0 dB(A) in the specified frequency band.


Cylinder pressure;Combustion noise index;Fast Fourier transform;Feedback control;Heat release ratio


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