Emission gases and their tolerances.

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.本研究探讨了运行参数调整对以传统柴油与马胡生物柴油（mahua biodiesel）混合燃料为燃料的柴油发动机性能与排放特性的影响。该生物柴油通过酯交换法（transesterification）制备，燃料混合配比的柴油占比范围为80%至100%，生物柴油占比为0%至20%。实验中系统地调整了多项关键发动机参数，包括发动机负荷（20%–100%）、马胡生物柴油混合比例（0%–20%）与发动机转速（1300–1450 rpm），同时将压缩比固定为18:1。本研究旨在确定最优参数组合，以提升燃烧效率并降低有害排气排放。研究结果显示，发动机效率实现了小幅但可观的提升，增幅约为2%至3%。尽管增幅看似微小，但当该提升与有害排放的同步降低相结合时，其重要性便显著凸显，这与全球向可持续燃料替代品转型的努力相契合。优化后的生物柴油混合燃料不仅提升了燃料利用率，还通过削减污染物排放推进了环境目标，凸显了其在提升发动机性能与保障生态可持续性方面的双重作用。本研究结果证实了马胡生物柴油作为石油柴油可行且环保的补充燃料的潜力。总体而言，本研究成果为提升柴油发动机性能同时降低环境污染提供了极具价值的数据支撑。