The research indicated that pscvt for vehicles , which has high performance - cost - ratio , has strong competition advantage relative to conventional mechanical multi - gear transmission . as a new product , it has good application prospects 本文的研究工作表明，有较高性能价格比的新型车用功率分流式无级变速系统相对于常规的多挡机械变速器具有较强的竞争力，作为一种更新换代产品，具有良好的应用前景。
Based on the analysis of the real work state of the tractor in the field , take the typical plough implement unit as an example ; a further study was made in this paper , including the theory of the automatic transmission and the quality of gearshift 本文以典型的犁耕机组为例，在分析拖拉机田间作业工况的基础上，深入研究了拖拉机自动变速系统理论及换档品质的问题，改进了换档执行机构，用模糊控制方法对换档品质进行了优化。
A new vehicle power split continuously variable transmission system ( pscvt ) is presented in this paper . the system consists of a variable pulley set , a planetary train , two electromagnetic clutches , a electromagnetic brake etc . electromagnetic clutches and brake are controlled by ecu 针对微型汽车，本文提出了一套功率分流式汽车无级变速系统，系统由一组可变带轮半径的带式无级变速装置和一组行星轮系、离合器及电子控制单元等组成。
Considering the high order nonelinearly and mutiple - input - mutiple - output coupling effect of the system , different driving condition and complex external disturbance , hybrid fuzzy - pid control with parameters selfturning is adopted in engine speed control system , the simulation which is integrated with vehicle model in the matlab environment shows that the performance and fuel economy of the car with pscvt is better than those of car with the standard manually shifted transmission 考虑到车辆系统的高阶非线性和输入输出的耦合效应及汽车运行的复杂工况和外界环境干扰等因素的影响，提出了混合模糊? pid控制算法用于变速系统速比的控制，并结合整车的数学模型在matlab下进行了计算机的动态仿真。
