- 學位論文
雙無段變速系統對車輛穩態轉向行為之影響分析
Analysis on the Effect of Dual Continuously Variable Transmission in Steady Turning of Four-wheel Vehicles
摘要
雙無段變速系統(DCVT)可以對同一輪軸上的雙輪提供獨立驅動，以及產生差速的效果，但由於差速產生時，車輪扭力之分配與一般差速器不同，其產生的轉向行為仍需進一步的探討。本研究主要探討雙無段變速系統對於車輛穩態轉向行為的影響，並調整無段變速系統參數調整車輛的轉向特性。以運動學與牛頓力學理論為基礎，建立幾何關係式和力平衡方程式，發展車輛轉向運動模型、無段變速系統模型、車輪傳動模型與打滑模型。模型考慮正向負載轉移與摩擦橢圓，使模擬更接近真實情況。因為方程式具有複雜的三角函數關係，難以求得解析解，利用數值分析方法求得數值解，利用此模型模擬車輛在不同的路面情況之直線打滑與過彎情形，針對不同車輪傳動之車輛有更進一步的了解。透過分析兩台不同特性之車輛，再經由雙無段變速系統對於車輛穩態轉向行為的影響分析，藉由調整無段變速系統之參數分析車輛的轉向特性，可以在車輛開發時，設計搭載DCVT機構與調整其特性之方法。利用本研究所發展的模型與分析方法，不同的車輛參數、正向負載轉移與不同的車輪傳動對車輛行為的影響，均可以有更完整的了解。
並列摘要
This study mainly focuses on the effect of the dual continuously variable transmission on steady turning behavior of four-wheel vehicles. First, a steering vehicle model is developed, and the motion equations based on the geometry and force equilibrium of the vehicle are derived for the steady state analysis. This model has included load transfer and friction ellipse. Then, using this model, numerical analysis can be performed. The effect of three differential mechanisms in several conditions is investigated. By using the mathematical model and numerical method established in this study, the behavior of different differential mechanisms of vehicle can be thoroughly realized. Finally this study proposes a method to adjust handling characteristics by dual continuously variable transmission vehicle.