Engine Growling Noise에 대한 실험적 연구 = The Study on Experimental Investigation of Engine Growling Noise

다국어 초록 (Multilingual Abstract)

In this study the experimental investigation was performed to identify the sources of engine growling noise and the transfer paths that are components of growling noise in the 1.61 4cylinder gasoline engine with 5 speed manual transmission in vehicle. Generally growl sounds might be present in the vehicles with manual transmission and the growl noise is audible during moderate to heavy acceleration during clutch partial to full engagement between 2000 and 2500 RPM. The growl sound is characterized by the presence of two audible tones of similar amplitude (within about 5-10 dB of each other) separated by about 20㎐. This results in the perception of a beat or modulation of the sound level. This modulation gives the "rough" character to the sound of the engine. This study describes the findings of investigation of insight into the factors contributing to growl sound indicated that primary even and odd orders and half orders were potential factors and that possibly power train flexible modes were factors. The findings of this study identify the acoustic mechanism of growl, the contributing factors from the engine combustion process, and some the structural amplification factors in associated with production of growl sound in the passenger compartment.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 현상 규명
• 3. 소음 전달 경로 분석
• 4. Powertrain Investigation
• 5. Source Investigation
• 6. 결론
• References