Improvement of engine noise causing rough sound quality

Jung Insoo; Sukzoon Kim; Teockhyeong Cho

doi:10.7776/ASK.2018.37.4.242

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2018 Vol.37, Issue 4 Preview Page Next Page

Research Article

Improvement of engine noise causing rough sound quality 거친 청감을 유발하는 엔진소음 개선 방향 고찰

31 July 2018. pp. 242-247

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Abstract

The automotive industry is making various efforts to cope with ever-increasing exhaust emissions and fuel economy regulations. However, this often results in degraded NVH (Noise, Vibration, and Harshness) performance. For example, we proposed the causes and improvements for the noise generated by the high-pressure pump noise of a gasoline engine, the change of acceleration noise due to dual injection of MPI (Multi-Point Injection) and GDI (Gasoline Direct Injection), the noise of a gasoline turbocharger, and the combustion noise deteriorated due to the injection parameters calibration in a diesel engine. Since these noises are caused by the high frequency noise, and the driver feels the rough sound quality, efforts to reduce them with proper NVH measures are indispensable.

Keywords

High frequency noise

Sound roughness

High-pressure pump noise

Turbocharger noise

Diesel combustion noise

지속적으로 강화되는 배기가스 및 연비 규제에 대응하기 위해 자동차 업계에서는 다양한 노력을 하고 있다. 하지만 이로 인해 NVH(Noise, Vibration, and Harshness) 성능이 악화되는 경우들이 많이 발생하고 있다. 사례로 가솔린 엔진의 고압 펌프 소음 및 MPI(Multi-Point Injection)와 GDI(Gasoline Direct Injection)의 듀얼 분사로 인한 가속 천이 소음, 가솔린 터보차저 소음, 디젤 엔진에서의 분사변수 캘리브레이션으로 인해 악화되는 연소음에 대한 원인 및 개선방향을 제시하였다. 이러한 소음들은 고주파 소음으로 운전자에게 거친 청감을 유발하기 때문에 적절한 NVH 대책으로 저감시키는 노력이 반드시 필요하다.

키워드

고주파 소음

거친 청감

고압 펌프 소음

터보차저 소음

디젤 연소음

References

H. Kuma, T. Inoue, T. Isogai, K. Shimizu, and T. Iida, “Development of reduction method for whirl noise on turbocharger,” SAE Techanical Paper 2007-01-4018 (2007).

X. Kuang J. Pang, H. Zhang, L. Yang, and J.-h. FU, “Surge noise identification and control of automotive turbochargers,” SAE Technical Paper 2014-01-2053 (2014).

J. Veit, P. Langjahr, S. Brandl, and B. Graf, “Turbocharger noise quality parameters for efficient TC noise assessment and refinement,” SAE Technical Paper 2016-01-1817 (2016).

S. Mendez and B. Thirouard, “Using multiple injection strategies in diesel combustion: potential to improve emissions, noise and fuel economy trade-off in low CR engines,” SAE Technical Paper 2008-01-1329 (2008).

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 Technical Paper 2013-01-1901 (2013).

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 : 37
No :4
Pages :242-247
Received Date : 2018-05-25
Accepted Date : 2018-07-19
DOI :https://doi.org/10.7776/ASK.2018.37.4.242

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

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