金属链式无级变速器动力特性的研究

深入研究了金属链式无级变速器传动机理和其锥盘V型结构的轴向加压原理.通过对锥盘夹紧力、推力关系等方面的研究，建立了锥盘动力传动特性的数学模型，仿真出加压机构的理论加载曲线，并进行了相应的动力特性实验，获得推力比相对速比、转矩比变化的规律曲线；同时验证了理论模型与仿真的正确性，并得出速比变化率对汽车的加速具有负的作用，不能完全依靠推力比实现速比的调节，高、低链速下的推力比与速比关系会呈现少许差异等重要结论.研究成果为研制性能可靠的轴向夹紧力控制结构与系统奠定了理论基础.

Research on the Dynamic Characteristics of Metal Chain Continuously Variable Transmission

The transmission mechanism and axial compression principle of the V-shaped structure of the metal chain continuously variable transmission (CVT) were studied in depth. By studying the relationship of clamping force and thrust for the cone disk， the mathematical model of dynamic characteristics were established， the theoretical loading curve of the compression mechanism was derived and simulated， and the experiment of corresponding dynamic characteristics was carried out to obtain the thrust ratio. It was concluded that the change rate of speed ratios has a negative effect on the acceleration of the vehicle， and the thrust ratio cannot be completely relied on to adjust the speed ratio. The relationship between the thrust ratio and the speed ratio at high and low chain speeds is slightly different. Thus， it may lay a foundation for the development of reliable axial clamping force control structure and system.