在生質柴油的使用上，由於其可再生、可生物分解、可獨立或與柴油混合使用的特性，以及可大幅降低部分有毒物質的排放濃度，是一具吸引力的替代能源。但生質柴油在成份上與石化柴油的差異，引響了引擎壓縮點火的過程甚鉅，其熱值、十六烷值的不同造成在燃燒過程中的差異，使得引擎在操作上性能有所變化。要使用不同油品來運轉柴油引擎時，在控制策略上也應有些微的調整，使引擎能夠達到最佳狀態。本研究以石化柴油(D100)與非糧料源生質柴油(B100)為研究對象，在不變動目標引擎原廠機構設計的前提下，以改變引擎參數的方式進行實機測試及燃燒分析(包括缸壓分析、熱釋放率等)。在不同操作點附近探討噴油正時、EGR比例對輸出扭力及排放的引響。

Biodiesel is an attractive alternative energy because its characteristic of renewable, biodegradable, could be used in pure form or blended with petroleum diesel and could reduce toxic emission. But the different in composition of biodiesel and petroleum diesel greatly influenced the combustion process. If we want to use biodiesel as fuel of diesel engine, we should change the control strategy for maintaining the engine performance.The purpose of this study is to determine the optimal engine decision-making for petroleum diesel (D100) and biodiesel (B100). Parameters of the engine such as injection timing, injection duration, common-rail fuel pressure and exhaust gas recirculation (EGR) are fine-tuned using the MotoTron Control System so as to optimize the engine performance based on the results from the engine dyno tests. Combustion analysis is conducted via the measurement of cylinder pressure measurement. The main goal is to find the balance between engine torque and emission to optimize the engine.

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