A comprehensive experimental analysis on biodiesel/toluene ratio and SOI change in a diesel engine under medium load conditions

In the presented study, the effects on engine performance and emissions were experimentally examined by using different ratios of fuel blends and SOI changes in a single-cylinder diesel engine. Experiments were carried out at a constant engine load (%50 load) under a constant engine speed of 2400 rpm and a different SOI. Firstly, B20, T10, and T20 fuels were utilized in place of D100 in a diesel engine as alternative fuels. And then, T10 fuel was utilized instead of D100 fuel, and the impact of this change on emissions and engine performance was examined for various SOIs. Although there was a decrease in IMEP with B20 use, T10 and T20 increased IMEP compared to D100. In addition, although the fuels used instead of D100 significantly reduce CO, HC and smoke opacity, they create a partial increase in NOx emissions. Although there was an increase in NOx emissions with the use of alternative fuels, there was a decrease in the use of T10 and T20 fuels compared to B20. This reduction in NOx due to the use of T10 and T20 is important for the use of biodiesel in diesel engines. In the study, it was seen that the SOI change was effective on the results in the T10 fuel experiments, and the most suitable angle for SOI in the use of T10 fuel in diesel engines was 21°CA and 23°CA. T10 fuel has been shown to have a promising effect on engine performance and emissions.

Graphical abstract