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

Jaemin  Jin; Dongchul  Lee; Insoo  Jung

doi:10.7776/ask.2016.35.3.208

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evelopment 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

31 May 2016. pp. 208-215

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Abstract

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.

Keywords

Cylinder pressure

Combustion noise index

Fast Fourier transform

Feedback control

Heat release ratio

엔진 연소 거동을 제어 및 개선하기 위하여, 연소실 내의 압력에 대한 다양한 연구가 지속적으로 수행되고 있다. 이 논문에서는 연소실 내의 압력을 통하여 디젤엔진의 연소음 레벨을 추정하였으며 이를 연소음 지수라고 정의하였다. 연소음 지수는 연소실 내의 압력신호를 고속 푸리에 변환을 통하여 계산하였으며 그 유효성을 검증하였다. 검증된 연소음 지수를 기반으로 한 제어기가 개발되었으며 차량에 탑재하였다. 연소음 지수의 목표 값을 만족시키기 위하여 일부의 분사변수를 제어하였으며 차량 연소음이 특정 주파수 영역에서 4.0 dB(A)까지 개선되었다.

키워드

연소실 압력

연소음 지수

고속 푸리에 변환

되먹임 제어

열방출율

References

1.H. Nanjundaswamy, M. Tatur, D. Tomazic, T. Koerfer, M. Lamping, and A. Kolbeck, “Fuel property effects on emissions and performance of a light-duty diesel engine,” SAE Technical Paper 2009-01-0488 (2009).

2.I. Jung, J. Jin, H. So, C. Nam, and K. Won, “An advanced method for developing combustion noise through the analysis of diesel combustion,” SAE Int. J. Engines 6, 1379-1385 (2013).

3.T. Schnorbus, S. Pischinger, T. Körfer, M. Lamping, D. Tomazic, and T. Marek, “Diesel combustion control with closed-loop control of the injection strategy,” SAE Technical Paper 2008-01-0651 (2008).

4.J. B. Heywood, Internal Combustion Engine Fundamental (McGraw-Hill, Singapore, 1988), pp. 503-514.

5.S. Wang, C. Chalu, N. Duclaux, and M. Paquien, “Noise optimization of diesel engines with new combustion systems,” SAE Int. J. Passeng. Cars – Mech. Syst. 2,1387-1395 (2009).

Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 35
No :3
Pages :208-215
Received Date : 2016-04-29
Accepted Date : 2016-05-20
DOI :https://doi.org/10.7776/ask.2016.35.3.208

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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