- 學位論文
應用HCCI引擎於串聯式複合動力機車之研究
Investigation of HCCI Engine for Series Hybrid Electric Motorcycle
摘要
均質進氣壓燃(homogeneous charge compression ignition, HCCI)引擎兼具柴油引擎的高熱效率與汽油引擎低排污的優點，使用HCCI型式的油電混合系統可以達到更低燃油消耗及減少廢氣的目標。本研究將HCCI引擎與串聯式複合動力系統做整合，將原廠(CVT)機車，改裝為HCCI串聯式複合動力系統，其動力源為安裝於前輪的直流有刷車輪馬達，由48 V的鉛酸電池所驅動，HCCI引擎燃料為92無鉛汽油及二甲醚(DME)，先使用92無鉛汽油在SI模式讓引擎達到工作溫度，接著使用DME為HCCI模式下的燃料，當電池需要充電時，以HCCI引擎帶動發電機發電，經DC-DC converter使輸出電壓達到52 V穩定的對電瓶充電。 首先以反向式數學模型進行系統組件及油耗評估，模擬出原車系統及HCCI串聯式複合動力系統行駛於ECE-40行車型態的結果，其中複合動力系統油耗表現較原車系統約改善2倍，表示系統組件搭配可行。在實車測試時ECE-40行車型態得到油耗數據進行比較，原車系統燃油經濟性為30.8 km/l，HCCI串聯式複合動力系統在引擎運轉點為3500 rpm時，燃油經濟性為73.7 km/l，相較原車系統改善139.2 %。
並列摘要
Homogeneous Charge Compression Ignition (HCCI) engine combines the advantages of high thermal efficiency of diesel engine and low emission of gasoline engine. In this study, HCCI series hybrid system includes the technologies of HCCI engine and series hybrid system. Therefore, HCCI series hybrid system can achieve the goals of lower fuel consumption and reduce emission of engine. The HCCI engine is modified by the original engine, and combines it with series hybrid system. The DC brush motor is used to front wheel which as power source. It is driven by the battery of lead-acid (48 V). The fuel system of HCCI engine is includes 92 unleaded gasoline and dimethylether (DME). At first, the 92 unleaded gasoline is used for SI mode which to reach operating temperature, and then the DME is for HCCI mode. When the battery needs charging, the generator is driven by HCCI engine which to produce the output voltage (52 V) with DC-DC converter to charge the battery. The backward-facing model is used to examine integration of target comments and the fuel economy. The simulation result from the ECE-40 driving cycle of original system and HCCI series hybrid system, the HCCI series hybrid system fuel economy can be improved 2 times than original system. In the real vehicle test in ECE-40 driving cycle the original fuel economy is 30.8 km/l, the HCCI series hybrid system at the engine operating 3500 rpm, the fuel economy is 73.7 km/l, compared to the original system the fuel economy improved 139.2 %.