The aim of the present investigation is to examine the characteristics of diesel engine for varying concentrations of diethyl ether (DEE) as an oxygenated additive in repurpose used cooking oil (RUCO) biodiesel and diesel blends. In the beginning, several pilot experimentations are carried out on diesel and B20 blend. Afterward, 0.8%, 1.6%, 2.4%, 3.2%, and 4% of DEE was blended with biodiesel/diesel. The IS standards are followed for investigating the various properties of biodiesel blends. Property investigation results revealed that the increasing concentration of DEE reduces the density, viscosity, calorific value, flash point with increase in cetane number. All the prepared blends are examined on water-cooled diesel engine at six distinct loads and constant engine speed. The investigation revealed that the BTE (brake thermal efficiency) increased by 16.06% while BSFC (brake specific fuel consumption) decreased by 4.12% for 0.8% concentration of DEE in a blend when contrasted with diesel. All tested fuel shows nearly the same trend of BSEC at all loading conditions and compression ratios. Further, the CI engine fueled with biodiesel-DEE-diesel blends has shown 20.41%, 34.69%, and 23.33% a maximum reduction in CO, HC, and NOx emissions as compared to diesel fuel at notable working conditions. The CO₂ emission reduced in ternary blends due to lower carbon content in the blend. It can be noted that the minimum 0.8% concentration of DEE at CR15 in the ternary blend provided significant increment in BTE as 16.06%, with a 4.12% reduction in BSFC while CO, HC and NOx emissions minimized by 15.07%, 3.45%, and 14.70% than that of diesel fuel. In minimum concentration of DEE, the A0.8B19.2 blend provided luminous results in both performance and emission characteristics at CR15.

本研究的目的是要研究柴油发动机的特性，该柴油发动机具有多种浓度的二乙基醚（DEE），作为再利用的食用油（RUCO）生物柴油和柴油混合物中的一种含氧添加剂。首先，对柴油和B20混合物进行了一些试验性实验。之后，将0.8％，1.6％，2.4％，3.2％和4％的DEE与生物柴油/柴油混合。遵循IS标准来研究生物柴油混合物的各种特性。性能研究结果表明，随着十六烷值的增加，DEE浓度的增加会降低密度，粘度，热值，闪点。在水冷柴油机上以六种不同的负载和恒定的发动机转速检查所有制备的混合物。调查显示，与柴油相比，当掺混物中DEE的浓度为0.8％时，BTE（制动热效率）提高了16.06％，而BSFC（制动比燃料消耗）降低了4.12％。在所有负载条件和压缩比下，所有测试燃料的BSEC趋势几乎相同。此外，与柴油在显着工作条件下相比，用生物柴油-DEE-柴油混合燃料驱动的CI发动机最大降低了20.41％，34.69％和23.33％的CO，HC和NOx排放。一氧化碳 与柴油在显着工况下相比，用生物柴油-DEE-柴油混合燃料驱动的CI发动机最大降低了20.41％，34.69％和23.33％的CO，HC和NOx排放。一氧化碳 与柴油在显着工况下相比，用生物柴油-DEE-柴油混合燃料驱动的CI发动机最大减少了20.41％，34.69％和23.33％的CO，HC和NOx排放。一氧化碳由于三元共混物中碳含量较低，因此减少了₂排放。可以注意到，三元混合物中CR15处DEE的最低浓度为0.8％，使BTE显着增加了16.06％，BSFC降低了4.12％，而CO，HC和NOx的排放量分别减少了15.07％，3.45％和1.5％。比柴油高14.70％。在最小浓度的DEE中，A0.8B19.2共混物在CR15处的性能和发射特性均提供了发光结果。