Study of Effects for Diesel Engine Operation Parameters on Soot Emission 顧英志、林海平
E-mail: 9419877@mail.dyu.edu.tw
ABSTRACT
This study indirective 4-cycle turbochanged engine with intercooler, adapted Taguchi Methods to investigate the relationship between engine operation condition and emission of smoke and NOx of a Mitsubishi 4M40-2AT1 2385 c.c.. In addition, the optimalized operation parameters for improving air pollution of diesel engine can be found out. The first part of our study was static Taguchi Methods to analyze the interactions of various operation parameters, in order to investigate the effects of operation data to air pollution such as soot emission and NOx and consequently minimized the effect. Next, The dynamic Taguchi Methods for injection timing was used next to find out the effect of injection timing on air pollutions such as smoke and NOx emission. The determination of air pollutions tested under transient testing procedures (US FTP, Transient Cycle testing procedures) and static testing procedures by engine dynamometer in accordance with domestic regulations. The results revealed when the US FTP, Transient Cycle procedures are applied, the sulfur content in diesel and intake temperature are relevant to the soot emission and NOx emission. The maximum improving can reach 28.9% (static property) and 30.0% (dynamic property). When the testing procedures in accordance with domestic regulation are applied, exhaust pressure and maximum injection capacity became the major factors relevant to air pollution. The maximum average improving can reach 43.8% for soot emission. The result inconsistency was attributed to different operation data setting which was caused from different procedures.
Keywords : Diesel engine, Smoke emission, Taguchi Methods ; Optimization, Relevance.
Table of Contents
封面內頁 簽名頁 博碩士論文電子檔案上網授權書 iii 博碩士論文授權書 iv 中文摘要 v 英文摘要 vi 誌謝 viii 目錄 ix 圖目錄 xi 表目錄 xiii 第一章 緒論 1 1.1研究背景與動機 1 1.2研究目標 4 1.3研究方法 7 第二章 文獻探討 8 2.1引擎運轉狀態對黑煙 及NOx污染物生成影響 9 2.2油品特性對黑煙及NOx污染物生成影響 10 2.3噴射正時對對黑煙及NOx污染物生成影響 14 2.4 進氣溫度對黑煙及NOx污染物生成影響 15 第三章 柴油引擎廢氣污染物形成概論 16 3.1氮氧化物之形成機制 16 3.2粒狀污 染物之形成機制 18 第四章 相關理論及研究方法 21 4.1田口實驗計劃法 21 4.1.1田口實驗計劃法 21 4.1.2直交表(Orthogonal Arrays，OA) 28 4.2柴油引擎瞬態循環測試方法 31 4.3柴油汽車排放煙度試驗程序與方法 35 第五章 實驗結果與討論 36 5.1 實驗設備及原理 36 5.1.1引擎動力計 36 5.1.2 NOx分析儀 37 5.1.3廢氣取樣設備 39 5.1.4粒狀污染物取樣設備 44 5.1.5煙度計 46 5.1.6實驗引擎規格 47 5.2實驗規劃 49 5.2.1實驗程序規劃 49 5.2.2特性值因素配置及水準選擇 52 5.3實驗結果 67 5.3.1靜態 特性之引擎操作參數效應影響分析 68 5.3.2動態特性之引擎操作參數效應影響分析 92 第六章 結論與建議 107 6.1結論 107 6.2建議 110 參考文獻 111
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