本研究對於一般小型車常見之獨立式懸吊,包括雞胸骨式與麥花臣式多連桿懸吊系統,發展出可變桿長懸吊系統,探討當車輛過彎時,如何藉由桿件桿長之調整改變車身翻滾中心位置,抑制車身翻滾角;並且在高速過彎時,改變懸吊桿長使車輛更安全的行駛。首先建立二分之一車懸吊數學模型,利用懸吊導數法執行懸吊在空間中的運動分析,接著以車身翻滾角作為可變桿長伸長量的依據,找到兩者之間的關係值,分析內外側輪之差異,觀察在不同的桿件伸長量下,車輛翻滾中心、輪胎前束與傾角的變化,並調整桿長有效抑制車輛翻滾角,且避免高速過彎時的車輛側滑或翻滾。最後利用ADAMS/Car分別驗證上述懸吊數學模型的正確性,並且利用全車模擬進行此研究之可行性評估。
This study analyzes the motions of independent suspension mechanism including Double-Wishbone type, Macpherson Strut type, and multi-link type. Improving the anti-roll performance of vehicle in high-speed skid condition, the variable link-length suspension system is developed in this paper such that the roll angle could be reduced in cornering maneuvers. The half-car geometry model with variable link-length suspension system is built using suspension derivative method. The roll center location of vehicle is then derived with different k values which represent the relationship between the roll angle of vehicle and the elongation of variable link-length suspension system. Finally, the analyzed results are verified by simulation of ADAMS/Car software