不同噴油參數時柴油混摻綠色柴油及進氣處添加丁醇對共軌柴油引擎之性能效應研究

STUDY ON THE EFFECT OF DIESEL BLENDED WITH HYDROTREATED VEGETABLE OIL AND PORT-INJECTING BUTANOL WITH DIFFERENT INJECTION PARAMETERS ON PERFORMANCE OF A COMMON-RAIL DIESEL ENGINE

本研究係將丁醇手動系統改為電子控制噴射系統（ECU）、丁醇噴嘴及數據微調處理器，將能精確的對於丁醇導入時機及導入量進行及時控制，結合共軌噴射柴油引擎。在不同引擎轉速與負荷下，改變噴射參數、綠色柴油混合率、丁醇質量分率及EGR比率，量測引擎排氣各污染物（CO、HC、NOx、Smoke和PM2.5等），修改KIVA-3V，配合進氣處噴丁醇，數值模擬暫態噴霧燃燒、紊流及污染。實驗結果顯示，噴射正時越提前，有足夠的時間使綠色柴油混摻柴油均勻混合。進氣處噴射丁醇能增加氣缸壓力峰值與熱釋放率，並增加制動熱效率，並減少CO、HC、Smoke與PM2.5污染物的排放。噴射壓力增加時，可降低CO、HC、Smoke及PM2.5。隨著綠色柴油混摻柴油比率越高，越降低CO、HC、NOx、Smoke及PM2.5。比較數值模擬與實驗結果，發現兩者的趨勢非常吻合，證實本研究採用程式的可信度。

This study replaced the butanol manual system with an electronically controlled injection system (ECU), a butanol nozzle, and a data fine-tuning processor, which will enable precise and timely control of the timing and amount of butanol introduction, combined with a common-rail injected diesel engine. Varying injection parameters, green diesel blend rate, butanol mass fraction, and EGR ratio at different engine speeds and loads, and measuring engine exhaust pollutants (CO, HC, NOX, Smoke, and PM2.5). Modification of KIVA-3V with butanol injection at the intake, numerical simulation of transient aerosol combustion, turbulence, and pollution. The experimental results showed that the earlier the injection timing was, the more time there was for the green diesel blend to mix evenly with the diesel. Injecting butanol at the intake increases the peak cylinder pressure and heat release rate, increases the thermal efficiency of the brakes, and reduces the emission of CO, HC, Smoke, and PM2.5 pollutants. The increase in injection pressure reduces CO, HC, Smoke, and PM2.5, and the higher ratio of green diesel blended with diesel reduces CO, HC, NOX, Smoke, and PM2.5. A comparison of the numerical simulations with the experimental results reveals that the two trends are very much in line with each other, confirming the credibility of the procedure used in this study.