本研究改良前人所設計的壓縮空氣推動液壓馬達系統；先分析前人系統，設計出可回收排氣殘壓的新運作模式，並且使輸出動力與時間關係的曲線更為平穩。在本研究中，比較舊有的運作模模式與新的運作模式效率差異，並在膨脹/等壓四種不同操作方式下量測各方式之系統效率，找出最適合使用在行動載具上的運作參數。

The purpose of this research is to redesign the compressed air driven hydraulic motor system which is designed in the former research and to improve the control method and system efficiency. In this research, intake pipe system is rearranged. A new mode of operation to recover residual pressure is used. This recovering mode can boost the system to improve the system efficiency. Finally, we measure system efficiency in expand mode and isobaric mode to find out the optimum operating parameters.

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