Multi-Injection Performance Optimization Study for a High Pressure Direct Injection Common Rail Diesel Engine
林秉彥、張一屏
E-mail: 363622@mail.dyu.edu.tw
ABSTRACT
The main purpose of this study is to establish the multiple injection performance optimization methodology for a high pressure Direct Injection Common Rail (DICR) diesel engine. The hardware and software of the engine control system were combined with the engine dynamometer display real-time performance parameters so that the engine control parameter tuning and multi-objective optimization rules can be integrated and the engine performance be verified at the same time by dynamometer experiments. This study has built the fuel consumption and pollution models of vehicle driving cycle which then was converted into engine torque and speed by using the real vehicle parameters. Several key points were sorted from the corresponding map data for steady state estimation measurement. The selected key points control parameters were changed to reduce the overall exhaust emissions.
Experimental design optimization analysis software will emphasize three filtered driving cycle key points with both single injection and double injection analysis. The engine performance response surface functions were built and used to find optimal control parameters by using multiple targets goal-attainment optimization search program. The predicted diesel engines single and multiple injection performance, include brake torque, specific fuel consumption and four major emissions, were compared and optimized to reduce fuel consumption and emissions. The four corresponding engine control parameters include the pre-injection and main injection timings and injection durations were calculated and validated by engine dynamometer tests. The engine combustion heat release and its rate were calculated by using engine combustion pressure –crank angle data and validated with combustion analyzer under different engine operating conditions. Single injection and double injection combustion analysis were conducted and
compared. The dynamic relationship between control and the response performance can be used for future reference in developing of DICR diesel engine management systems. By experimental design and multi-objective optimization search, the experiments time and expanse can be reduced and the efficiency of engine parameters calibration and adjustment can thus be improved.
Keywords : DICR diesel engine multiple fuel injection control system、Diesel engine multiple injection performance optimization
、Design of experiment Multi-objective optimization search、Diesel engine combustion analysis 相關次數:
Table of Contents
封面內頁 簽名頁 中文摘要...iii ABSTRACT...iv 誌
謝...vi 目 錄...vii 圖目 錄...ix 表目 錄...xvi 符號說 明...xix 第一章 緒 論...1 1.1前 言...1 1.2文獻回
顧...2 1.2.1柴油車輛多點噴射性能策略相關文 獻...2 1.2.2柴油引擎多點噴射最佳化設計相關文
獻...9 1.3研究動
機...11 1.4本文架 構...12 第二章 研究方
法...14 2.1行車型態關鍵點篩選分
析...15 2.1.1行車型態關鍵點油耗污染最佳化模擬分 析...18 2.2實驗設計法與多目標最佳
化...23 2.2.1實驗設計
法...23 2.2.2多目標性能功效係數最佳化搜 尋...24 2.2.3多目標達陣最佳化控制參數搜
尋...25 2.3四行程直接噴射共軌式柴油引擎燃燒分析模組建 立...27 2.4實驗相關設
備...29 第三章 柴油引擎多次噴油性能最佳化分 析...38 3.1多次噴油油耗污染最佳化量測分
析...38 3.2柴油引擎單噴與雙噴油耗汙染最佳化驗 證...91 第四章 柴油引擎多次噴射性能燃燒分 析...95 .4.1雙噴控制參數對扭力的影 響...95 .4.2雙噴主噴油正時對扭力的影 響...97 4.3單次噴射與二次噴射燃燒分析比 較...109 第五章 結論與建
議...121 5.1結
論...121 5.2建議事項與未來研究項 目...123 參考文
獻...125 附 錄...130 REFERENCES
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