本研究以商用數值模擬軟體Matlab建立單缸及雙缸(Split-cycle)氣動引擎機構模型，探討活塞環與汽缸壁間摩擦及活塞往復慣性對性能輸出的影響。單缸氣動引擎輸出的最大功率受限於壓縮空氣在缸體內所能膨脹之最大體積及膨脹效率。Split-cycle氣動引擎則是為提高壓縮氣體的使用效率，而把兩個單缸引擎串聯成雙缸引擎，文中將進一步探討sp lit-cycle氣動引擎之性能模擬結果。
實驗部分則改變四行程內燃機引擎之氣門時序，將其改製成氣動引擎。比較實際測量氣動引擎輸出之性能數據與理論模型之計算數值，討論實驗與模擬之差異，分析氣動引擎的能量使用效率及功率損耗。

In this study, we developed analytical models of a single-cylinder and a split-cycle air engine using commercial numerical simulation software Matlab. We will discuss how the piston reciprocating inertia and friction between piston rings and cylinder wall affect the air engine performance. Single-cylinder air engine output performance is limited by its maximum volume and the expansion efficiency. The split-cycle air engine was designed to improve the efficiency of use of compressed air by two cylinders with different sizes. And we will discuss about the simulate performance of split-cycle air engine.
In the experiment, we transform the four-stroke internal combustion engine to two-stroke air engine by redesigning the valve timing. We will discuss the difference between simulation and experiment with its energy efficiency and power loss.

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