期刊
FUEL
卷 317, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2022.123505
关键词
Bi-fuel vehicle; Hydrogen fuel; Internal combustion engine; Sound levels; Psychoacoustics parameters
资金
- Spanish Ministry of Economy and Competitiveness through the R + D + I research project [BIA2016-76957-C3-2-R]
- Banco de Santander
- Universidad Publica de Navarra (UPNA)
This study analyzed the influence of fuel type (gasoline or hydrogen) on the sound levels produced by a vehicle with an internal combustion engine. It was found that there is a slight increase in noise level outside the vehicle when using hydrogen as fuel, mainly in the 500Hz band. This may be attributed to the higher reactivity of hydrogen.
Whereas noise generated by road traffic is an important factor in urban pollution, little attention has been paid to this issue in the field of hydrogen-fueled vehicles. The objective of this study is to analyze the influence of the type of fuel (gasoline or hydrogen) on the sound levels produced by a vehicle with an internal combustion en-gine. A Volkswagen Polo 1.4 vehicle adapted for its bi-fuel hydrogen-gasoline operation has been used. Tests were carried out with the vehicle when stationary to eliminate rolling and aerodynamic noise. Acoustics and psychoacoustics levels were measured both inside and outside the vehicle. A slight increase in the noise level has only been found outside when using hydrogen as fuel, compared to gasoline. The increase is statistically sig-nificant, can be quantified between 1.1 and 1.7 dBA and is mainly due to an intensification of the 500 Hz band. Loudness is also higher outside the vehicle (between 2 and 4 sones) when the fuel is hydrogen. Differences in sharpness and roughness values are lower than the just-noticeable difference (JND) values of the parameters. Higher noise levels produced by hydrogen can be attributed to its higher reactivity compared to gasoline.
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