TY - JOUR T1 - Effect of Different Benzoylthiourea Additives to Gasoline on Engine Noise and Vibration in a Spark Ignition Engine AU - Coşman, Sertaç AU - Çelebi, Samet PY - 2025 DA - March Y2 - 2025 DO - 10.29228/eng.pers.79928 JF - Engineering Perspective JO - engineeringperspective PB - Hamit Solmaz WT - DergiPark SN - 2757-9077 SP - 31 EP - 40 VL - 5 IS - 1 LA - en AB - This study investigates the effects of dichloromethane (DCM) and benzoylthiourea derivatives (LH1 and LH2) at concentrations of 25 ppm, 50 ppm, and 100 ppm on engine noise and vibration across various load conditions. The results reveal that noise and vibration levels increased with engine load for all fuel blends, with significant variations depending on the additive type and concentration. Adding DCM to gasoline caused slight increases in both noise (up to 1.29%) and vibration (up to 6.14%) due to its higher density and altered combustion dynamics. LH1 consistently increased noise and vibration levels, with the highest increases observed at 100 ppm (6.77% noise and 23.38% vibration at no load), likely due to its volatile nature and destabilizing effects on combustion. Conversely, LH2 significantly reduced noise and vibration, particularly at 25 ppm and 50 ppm concentrations. At 100 ppm, LH2 reduced noise by 1.98% and vibration by 6.85% at full load compared to gasoline, attributed to its superior knock resistance and stabilizing effects on combustion. The findings highlight LH2 as a promising additive for applications requiring reduced engine noise and vibration, particularly at higher loads. In contrast, LH1's tendency to amplify noise and vibration suggests a need for optimization before practical implementation. 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International Journal of Green Energy, 18(12), 1309-1319. https://doi.org/10.1080/15435075.2021.1904406 UR - https://doi.org/10.29228/eng.pers.79928 L1 - https://dergipark.org.tr/en/download/article-file/5094288 ER -