- 學位論文
車輛混合動力系統之動態分析與評估
Dynamic Analysis and Evaluation of Vehicle Hybrid Powertrains
摘要
本研究之目的在於模擬與分析混合動力傳動系統及各動力源之動態特性以 及探討因車輛元件頻率接近共振頻率而影響駕駛舒適度的車輛加速度震盪情形， 並期望利用訂定設計元件作動策略及調整元件參數的方法評估減緩震盪的可能 性。論文首先介紹本研究所分析的混合動力系統之架構，定義此系統之七種行車 操作模式並利用功能動力圖之方法分析各模式之動力流。接著介紹模擬分析所使 用之軟體工具 SimulationX 並建立系統模型。之後對該混合動力系統之各種行車 型態作模擬分析，針對此系統的多動力源模式進行相同行車型態分析模擬並比較 差異。將此系統之所有操作模式切換可能性進行展開並模擬分析切換時對傳動系 統造成的車輛加速度震盪，最後分析三種傳動系統構造之共振頻率。本研究最後 針對分析之結果提出系統之改善方法並評估其系統動態反應。其中提出三種方法 降低系統在操作模式切換時的車輛加速度幅度，並利用調整系統元件參數的方法 避免系統經過共振頻率而影響駕駛舒適度。本研究分析混合動力系統之動態特性 並提出系統設計評估方法，可提供未來混合動力系統配置與模式切換策略擬訂時 之參考。
並列摘要
This study aims to analyze and simulate the dynamic characteristics of hybrid powertrains and power units and acceleration fluctuations which are caused by resonance frequencies and influence ride comfort, hoping to reduce the powertrain vibrations by designing mode-switch strategies and tuning parameters of components. This research starts with the introduction of the aimed hybrid system, then defines driving modes and power flows according to function power graph method. To simulate the characteristics of the hybrid system, this study first introduces the simulation software SimulationX then analyzes the differences between single power mode and multiple power mode. Additionally, this research analyzes dynamic characteristics during mode-switch and resonance frequencies of three different layouts. Finally, based on the results above this study develops three methods to reduce the acceleration jerks during mode-switch and evaluates vibration phenomena by tuning parameters. The results could be a considerable consultation for design of hybrid powertrain layout and mode-switching strategies.