Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Study on Noise Generation Characteristics of Simulated EGR System for Compression Ignition Diesel Engine

압축착화 디젤엔진의 모사 EGR 시스템에 의한 소음 특성 변화 분석

  • 박범 (기계공학과, 한양대학교) ;
  • 윤성준 (기계공학과, 한양대학교) ;
  • 박성욱 (기계공학과, 한양대학교) ;
  • 박준홍 (한양대학교 기계공학부)
  • Received : 2014.11.03
  • Accepted : 2014.12.17
  • Published : 2014.12.31
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Abstract

Experimental study was conducted to investigate the effect of EGR(exhaust gas recirculation) on engine noise using single cylinder combustion ignition engine. Under constant engine rotary speed of 1200 RPM, 8 mg fuel quantity was injected with 15, 18 and 21% of oxygen ratio and 1400 bar of injection pressure. Using the in-cylinder pressure data acquired by a piezoelectric transducer, the engine performance parameters were calculated. Radiated engine noise measured for 10 seconds was analyzed using spectral characteristics and sound quality metrics such as loudness, sharpness, roughness. From the obtained engine performance parameters and sound quality metrics, effect of oxygen ratio of the premixed air, start of injection timing on frequency characteristic and sound quality metrics were analyzed. Correlation analysis was conducted between MPRR(maximum pressure rise rate), RI(ringing intensity) and sound quality metrics. RI was identified as the most important factor having influence on the sound quality metrics.

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References

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