Engine specifications.

This study investigates how adjusting operational parameters influences the performance and emission characteristics of a diesel engine operating on a blend of traditional diesel fuel and mahua biodiesel. The biodiesel was obtained using the transesterification method, and fuel blends were formulated with diesel proportions ranging from 80% to 100% and biodiesel content from 0% to 20%. Key engine parameters such as engine load (20 –100%), mahua biodiesel blend (0 –20%), and engine speed (1300 –1450 rpm) were varied systematically during the experiments, while the compression ratio was held constant at 18:1. The aim was to determine the most effective combination of settings to enhance combustion efficiency and reduce harmful exhaust emissions. The findings demonstrated a modest yet meaningful improvement in engine efficiency, with gains of approximately 2–3%. While seemingly incremental, this enhancement becomes significant when coupled with concurrent reductions in harmful emissions, aligning with global efforts to transition toward sustainable fuel alternatives. The optimized biodiesel blends not only improved fuel utilization but also advanced environmental objectives by mitigating pollutant emissions, underscoring their dual role in enhancing performance and ecological sustainability. The outcomes of this study support the potential of mahua biodiesel as a viable and eco-friendly supplement to petroleum diesel. Overall, the results contribute meaningful data toward improving diesel engine performance while reducing environmental pollution.

本研究探讨了调整运行参数对采用传统柴油与马胡生物柴油（mahua biodiesel）混合燃料的柴油机性能与排放特性的影响。该生物柴油通过酯交换法制备，实验配制的燃料掺混物中，柴油占比为80%~100%，生物柴油占比为0%~20%。实验过程中，系统调控了多项关键柴油机参数：发动机负荷（20%~100%）、马胡生物柴油掺混比例（0%~20%）以及发动机转速（1300~1450 rpm），同时将压缩比固定为18:1。本研究的目标是探寻最优参数组合，以提升燃烧效率并降低有害排气排放。研究结果表明，发动机效率实现了小幅但极具意义的提升，增幅约为2%~3%。尽管该增幅看似微小，但结合有害排放的同步降低，该提升效果便具备显著价值，契合全球向可持续燃料替代品转型的发展方向。优化后的生物柴油掺混燃料不仅提升了燃料利用率，还通过削减污染物排放助力环保目标的达成，凸显了其在提升发动机性能与生态可持续性两方面的双重作用。本研究结果证实，马胡生物柴油可作为石油柴油的可行且环保的补充燃料，具备实际应用潜力。总体而言，本研究结果为提升柴油机性能、降低环境污染提供了极具价值的参考数据。