傳統引擎車輛有兩種耗能缺失，一是煞車造成的動能損失，另一是引擎運作於低效率區，本文主旨在利用串聯式液壓混合車解決這兩種耗能問題。串聯式液壓混合車使用液靜壓傳動系統，藉由定量泵浦的工作特性迫使引擎運作於高效率區，並利用液壓蓄壓器作為儲存煞車動能之元件，以這兩種概念設計建構實驗平台，針對液靜壓傳動以及實車建構做為考量，逐步改良設計迴路，其次設計控制器與決策邏輯達成對於串聯式液壓混合車之操控，以此實驗平台完成動態行駛實驗；最後，以推導出之數學模式配合控制策略，模擬串聯式液壓混合重型車輛，討論液壓混合車之節能效益。

Conventional vehicles with internal combustion engine have two defects which causing energy consumption. One is the loss of the braking energy, the other is low operating efficiency of internal combustion engine. The purpose of this article is to solve these two energy consumption problems with series hydraulic hybrid vehicle (SHHV). Series hydraulic hybrid vehicle uses a hydrostatic driving system. With the constant pump, the engine would be forced to operate at high efficient region, and the driving system uses hydraulic accumulator as energy saving device to save braking energy. The experimental platform would be constructed from the two concepts. To be aimed at hydrostatic transmission and construction of real vehicle to improve the circuit step by step. Next, designed controller and control logic to operate series hydraulic hybrid vehicle. As a result, the vehicle would be operated, and the experimental platform would run the dynamic driving test. Finally, series hydraulic hybrid vehicle have been simulated by combining mathematical model with control logic, then the energy saving of the SHHV would be discussed.

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