世界油價節節上升加上環保意識的抬頭，如何提高柴油引擎的熱效率與降低污染物的生成是刻不容緩的事情。均質壓燃方式(HCCI)可以提高直噴式柴油引擎的熱效率與降低排氣污染物。一旦將排放廢氣中的二氧化碳濃度降低，柴油引擎就可以形成一個密閉循環系統(CCDE)。若將HCCI和CCDE兩大系統結合，利用HCCI方式能夠降低污染物的特性，來提升CCDE系統的運轉壽命。
本文針對KUBOTA RK-125 型之單缸直噴式柴油引擎進行燃燒性能實驗。數值模擬以KIVA3V-RELEASE2為程式主體，藉由修改程式的汙染計算模式，進行數值運算。分析在不同引擎轉速、不同比例的預混合燃料及不同進氣溫度下，氣缸內的爆發壓力與引擎所產生的汙染物，包含氮氧化物、二氧化碳、一氧化碳、碳煙濃度及碳煙帄均顆粒大小，並將實驗的結果與數值模擬比較。
本研究已成功的將柴油引擎之進氣過程導入預混合氣(甲醇、乙醇和汽油)並搭配不同進氣溫度，進行穩定的密閉式循環柴油引擎實驗。實驗與模擬結果顯示提升進氣溫度，可具有減低CO與HC汙染物濃度之效果。未來期許本實驗之結果，對延長密閉式循環柴油引擎系統運轉時間有參考價值。

The world oil price rises steadily and the environmental protection consciousness increases, how to enhance the thermal efficiency the diesel engine and to reduce the pollutant the production is the urgent matter. A homogeneous charge compression ignition (HCCI) method can enhance the thermal efficiency of a DI diesel engine and reduce exhaust emissions. If we apply a HCCI method to the CCDE system, we could use the characteristic of HCCI that can reduce pollutant so as to increase the life of CCDE system.
This article is aimed at the KUBOTA RK-125 which is a single cylinder direct injection diesel engine and conducts a combustion experiment performance. The numerical simulation uses KIVA3V- RELEASE2 as the basis of the program by modifying the models of the pollution. The cylinder pressure and emissions including nitrogen oxides (NOx), carbon dioxide (CO2), carbon monoxide (CO), soot concentration and soot average particle diameter for a homogeneous charge compression ignition engine are calculated under different ratios of premixed fuels, intake gas temperature, and different engine speeds. The results between the simulation and the experiment will be compared.
The research has already implemented the fuels of methanol, ethanol, and gasoline successfully in the intake process with different intake gas temperature to carry out a stable diesel engine experiment. Experiment and simulation results show that enhancing the inlet temperature can have reduced the CO and HC pollutant concentrations. Future hopes for this experiment results has a reference value on extending the closed cycle diesel engine system running time.

[1] T. Ura and T. Obara, “Development of Depth Independent Closed Cycle Diesel Engine for an Autonomous Underwater Vehicle”, Proc, Unmanned Untethered Submersible Tech. PP. 1-9, 1991.
[2] Horng-Wen Wu, and Chin-Tsung Shu*, “Effects of Operating Parameters on Steady and Transient Behaviors of a Closed Cycle Diesel Engine,” Energy Conversion and Management, No. 47, PP. 2070-2080, 2006. (NSC:89-2611-E-006-052) (SCI, EI).
[3] 吳鴻文，“密閉式循環柴油引擎發電系統之研究與性能分析（II）”，第十五屆中國造船暨輪機工程研討會暨國科會成果發表會，C2-02場次，2003。
[4] 吳鴻文，密閉式循環柴油引擎發電系統之研發與性能分析 (Ⅲ)，第十六屆中國造船暨輪機工程研討會暨國科會成果發表會，C2-02場次，2004。
[5] J B.Heywood 著，蘇金佳 譯々"內燃機"々美商麥格羅〃希爾國際股份有限公司出版々pp.4-6，pp.645-717。
[6] S.Onishi, S.Hong JO, et al, “Active Themo-Atmosphere Combustion(ATAC)-A New Combustion Process for Internal Combustion Engines”, SAE 790501,1979.
[7] M. Christensen, A. Hultqvist et al, “Demonstrating the Multi Fuel Capability of a Homogeneous Charge Compression Ignition Engine with Variable Compression Ratio” SAE 1999-01-3679,1999.
[8] M. Christensen, et al, “Influence of Mixture Quality on Homogeneous Charge Compression Ignition. ” SAE982454,1998.
[9] Hisakazu Suzuki, et al. “Combustion Control Method of Homogeneous Charge Diesel Engines”, SAE980509,1998.
[10] 許志聰，“閉式循環柴油引擎之建立與運轉性能研究” ，國立成功大學造船暨船舶機械工程研究所碩士論文，2001。
[11] 楊佳穎，“長時間運轉型密閉式循環柴油引擎系統之建立、燃燒性能分析與單人自動化操控之研究” ，國立成功大學造船暨船舶機械工程研究所碩士論文，2002。
[12] 王仁宏，“密閉式循環柴油引擎發電系統機組化之性能、噪音與振動之研究” ，國立成功大學造船暨船舶機械工程研究所碩士論文，2003。
[13] 林文輝，“人造空氣對密閉式循環柴油引擎之性能影響分析” ，國立成功大學系統及船舶機電工程學系研究所碩士論文， 2005。
[14] 陳啟聰，“柴油引擎以天然氣為輔助燃料之燃燒循環變異與燃燒噪音之研究” ，國立成功大學機械工程研究所碩士論文，1989。
[15] Randy P. Hessel and Christopher J. Rutland, “Intake Flow Modeling in a Four-Stroke Diesel Using KIVA-3. ” Journal of Propulsion and Power,Vol.11,n2,p 378-384,March-April 1995.
[16] Thomas W. Ryan III and Timothy J. Callahan, “Homogeneous Charge Compression Ignition of Diesel Fuel”, SAE 961160, 1996.
[17] Dr Thomas ,W Ryan Iii ,Allen W Gray Iii, “Homogeneous Charge Compression Ignition (Hcci) of Diesel Fuel”, SAE971676, 1997.
[18] Salvador M. Aceves, et al. “A Multi-Zone Model for Prediction of HCCI Combustion and Emissions”, SAE 2000 World Congress, March 2000, Detroit, MI, USA.
[19] R. Ogink , V. Golovitchev, “Gasoline HCCI Modeling: Computer Program Combining Detailed Chemistry and Gas Exchange Processes”, SAE International Fall Fuels & Lubricants Meeting & Exhibition, September 2001, San Antonio, TX, USA.
[20] Petti Taskinen, “Effect of Soot Radiation on Flame Temperature, NOx-Emission and Wall Heat Transfer in A Medium Speed Diesel Engine” ASME & ICE2002-535, 2002.
[21] 王建盺，關小光，程勇，蔣恒飛，“乙醇-柴油混合燃料的燃燒與排放特性”，內燃機學報，vol.20 n3，p225-229，2002。
[22] 黃佐華，聲紅兵，蔣德明，曾科，劉兵，張俊強，王錫斌，“Study on Combustion Characteristics of a DI Diesel Engine Operating on Diesel/Methanol Blends”，內燃機學報，vol.21 n6,p401-410，2003。
[23] Song-Charng Kong , Rolf D. Reitz, et al. “Modeling the Effects of Geometry-Generated Turbulence on HCCI Engine Combustion”, SAE 2003 World Congress & Exhibition, March 2003, Detroit, MI, USA.
[24] Song-Charng Kong ,“A study of natural gas/DME combustion in HCCI engines using CFD with detailed chemical kinetics”, Fuel, v 86,n 10-11, p 1483-1489, July/August, 2007.
[25] 鄭博鴻，"均質進氣壓縮點火引擎之研究"，碩士論文，國立海洋大學輪機所，2004。
[26] Kim, Dae Sik; Kim, Myung Yoon; Lee, Chang Sik “Effect of premixed gasoline fuel on the combustion characteristics of compression ignition engine” Energy and Fuels, v 18, n 4,p1213-1219, July/August, 2004.
[27] Kim, Dae Sik ; Lee, Chang Sik “Improved emission characteristics of HCCI engine by various premixed fuels and cooled EGR” Fuel, v 85, n 5-6, p 695-704, March/April, 2006.
[28] Kim, Dae Sik ; Lee, Chang Sik “Reduction of Nitric Oxides and Soot by Premixed Fuel in Partial HCCI Engine”ASME,v128,p491-505,July,2006
[29] Kim, Dae Sik ;Kim, Myung Yoon; Lee, Chang Sik,“Combustion and emission characteristics of a partial homogeneous charge compression ignition engine when using two-stage injection” Combustion Science and Technology, v 179, n 3, p 531-551, March, 2007.
[30] Salvador M. Aceves, et al. “Analysis of the Effect of Geometry-Generated Turbulence on HCCI Combustion By Multi-Zone Modeling”, SAE Brasil Fuels & Lubricants Meeting, Rio De Janiero, BRAZI ,May 2005.
[31] Mingfa Yao; Zheng Chen; Zunqing Zheng;Bo Zhang; Yuan Xing “Study on The Controlling Strategies of Homogeneous Charge Compression Ignition Combustion with Fuel of Dimethy Ether and Methanol” State Key Laboratory of Engines, Tianjin University, No.92 , 2005.
[32] Myung Yoon Kim; Dae Sik Kim; Chang Sik Lee ,“Reduction of Nitric Oxides and Soot by Premixed Fuel in Partial HCCI Engine,” Joural of Engineering for Gas Turbines and Power, Vol.128, 2006.
[33] Lu¨ Xingcai,* Hou Yuchun, Ji Libin, Zu Linlin, and Huang Zhen,“Heat Release Analysis on Combustion and Parametric Study onEmissions of HCCI Engines Fueled with 2-Propanol/n-Heptane Blend Fuels” Energy and Fuels, v 20, n 5, p 1870-1878, September/October, 2006.
[34] 李智勝，“均質進氣壓燃式引擎之進氣對燃燒特性之效應研究” ，國立成功大學系統及船舶機電工程學系研究所碩士論文， 2006。
[35] 歐東哲，“柴油引擎於進氣處使用輔助燃料噴射之運轉性能及排氣污染效應之研究”，國立成功大學系統及船舶機電工程學系研究所碩士論文， 2007。
[36] 歐祥程，“數值模擬應用於均質進氣柴油引擎之排氣污染研究” ，國立成功大學系統及船舶機電工程學系研究所碩士論文， 2007。
[37] Wanhua Su; Bin Liu; Hui Wang; Haozhong Huang, “Effects of Multi-Injection Mode on Diesel Homogeneous Charge Compression Ignition Combustion,” Journal of Engineering for Gas Turbines and Power, Vol. 129,JANUARY 2007.
[38] Sanghoon Kook; Seik Park; Choongsik Bae*,“Influence of Early Fuel Injection Timings on Premixing and Combustion in a Diesel Engine,” American Chemical Society, Vol. 22, No. 1, 2008.
[39] Horng-Wen Wu and Jiunn-Der Sy*, “Heat Release Analysis in an Indirect Injection Diesel Engine with Coupled Fuel Injection/Combustion Model,” Journal of Society of Naval Architects and Marine Engineers, R.O.C, Vol. 16, No.2, PP.39-51, 1997.
[40] Hiroyasu H.: “Combustion Engine Simulation and Instrumetation” lecture notes NO. 3,1985.
[41] Simescu, S.; Ryan, T. W.; Neely, G. D.; Matheaus, A. C. ;Surampudi , B. SAE Tech. Pap ,2002-01-0964, Ser. 2002.
[42] 陳忠忍，“應用濕式噴霧法淨化船用柴油引擎排氣之研究”，國立成功大學造船暨船舶機械工程研究所碩士論文，1998。
[43] Hirt, C.W., Amsden, A.A. & Cook, J.L., “An Arbitrary Lagrangian – Eulerian Computing Method for All Flow Speeds,” Journal of Computational Physics, Vol.14, pp.227-253, 1974.
[44] Riavard, W.C., Farmer, O.A. & Bulter, T.D., “RICE: A Computer Program for Multi-component Chemically Reactive Flows at All Speeds,” Los Alamos Scientific Laboratory Report, LA-5812-MS, 1979.
[45] Butler, T.D., Cloutman, L.D., Dukowicz, J.K., & Ramshaw, J.D., “CONCHAS: An Arbitrary Lagrangian - Eulerian Computer Code for Multicomponent Chemically Reactive Fluid Flow at All Speeds,” Los Alamos Scientific Laboratory Report, LA-8129-MS, 1979.
[46] Cloutman, L.D., Dukowicz, J.K., Ramshaw, J.D. & Amsden, A.A.,“CONCAS-SPRAY: A Computer Code for Reactive Flow with Fuel Sprays,”Los Alamos Scientific Laboratory Report, LA-9294-MS, 1982.
[47] Amsden, A.A., Butler, T.D., O’Rourke, P.J. & Ramshaw, J.D., “KIVA-A Comprehensive Model for 2-D and 3-D Engine Simulation,” SAE paper 850554, pp.1-15, 1985.
[48] Puttick, J. R., “Recycle Diesel Underwater Power plants”, Paper 710827 presented at SAE National Combined Fuels and Lubricants, Power plant and Truck Meeting, St. Louis, Mo. October, 1971.