金属带式无级变速传动系统速比匹配控制策略

Speed Ratio Matching Strategies of Metal V-belt Type CVT System

在汽车金属带式无级变速传动系统中 ,传动比的控制规律和相应的带轮轴向夹紧力的控制规律是无级变速传动系统匹配的关键技术。文中通过对现有的发动机实验数据进行数值拟合 ,以数表的形式给出了发动机的输出转矩模型、油耗模型。根据该发动机的转速调节特性 ,在汽车金属带式无级变速传动系统确定的传动比范围内 ,给出了实现发动机按最佳经济性和最佳动力性工况运行的传动比变化规律。

The ratio control strategy and the relevant pulley clamping control strategy of the Metal Pushing V-belt Type CVT C Continuously Variable Transmission are key technology of CVT system matching. The engine output torque model and oil consumption model are given in numerical table by cubic spline interpolation to fit engine test result. Based on the engine speed feature, the speed ratio changing strategy of CVT in the numerical table are given to realize the optimal fuel economy and optimal performance mode within the ratio range of the CVT system.