Abstract
Sometimes, engine oil is referred to as a factor that affects engine sound and driving feeling. To investigate the difference of engine noise according to the engine oil conditions in the viewpoint of sound quality, the interior and exterior sound of middle-class sedan with gasoline engine was compared under the different oil conditions. Objective analysis was conducted to find the existence of any appreciable change in psychoacoustic attributes. Loudness, sharpness, and roughness are observed as the important sound quality metrics. It was observed that the noise differences were induced by the oil property, temperature and used time. Basically, the dramatic difference is rarely observed with the difference of initial property of oil. According to change of temperature, lower loudness is observed at the high temperature condition. Comparing new and used oils, the relatively high loudness was observed at idle condition after replacing oil, especially in the low frequency range.
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Acknowledgments
This work was partially supported by the KRISS grant (KRISS — 2021 — GP2021-0002), the NRF grants (No. 2017R1A 2B4007133) and the Competency Development Program for Industry Specialists of MOTIE, operated by KIAT. (No. P00 17120, HRD program for xEV).
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Wan-Ho Cho received a Ph.D. degree in acoustics from the Korea Advanced Institute of Science and Technology (KAIST) in 2008. He was a postdoctoral fellow in the Acoustics Laboratory at KAIST from 2008 September to 2010 February and he worked at the Department of Precision Mechanics of Chuo University in Tokyo, Japan, from 2010 April to 2012 February. From March 2012, he joined in the Korea Research Institute of Standards and Science. His research interests are sound-field control by multichannel audio systems, product sound quality, acoustical signal processing, development of measurement method and acoustical metrology.
Sung-Hwan Shin has been a Professor of the Department of Automotive Engineering at Kookmin University, Korea. He received a Ph.D. degree from KAIST in 2004. His research interests are in the field of sound quality based noise control, psycho-acoustics, automotive sound design, machinery real-time monitoring and diagnosis, and signal processing.
Jeong-Guon Ih has been a Professor of Mechanical Engineering at KAIST, Korea, since 1990. His major research interests are in the field of vibroacoustics, product sound quality, and electro-acoustics. His research topics are related with the inverse source identification and field rendering, design of virtual vibro-acoustic field, development of new actuators, and psychoacoustic design of products.
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Cho, WH., Shin, SH. & Ih, JG. Sound quality change of the automotive engine noise by variation of engine oil condition. J Mech Sci Technol 36, 4935–4942 (2022). https://doi.org/10.1007/s12206-022-0907-y
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DOI: https://doi.org/10.1007/s12206-022-0907-y