车用功率分流无级变速驱动系统特性分析

The Characteristic Analysis of Power Split Continuously Variable Transmission Driving System for Vehicle Application

以车用功率分流无级变速驱动系统为研究对象,在对差动轮系、金属带式无级变速器、离合器单元的建模以及整车受力分析的基础上,结合离合器工作过程的三个阶段,建立了以无级变速功率分流传动单元为核心的驱动系统的动力学模型,并对其瞬态响应进行了运动和动力分析及仿真。仿真结果表明,在起步阶段,装备有功率分流无级变速驱动系统的车辆具有较好的加速性能,且离合器接合过程中驱动系统无级变速功率分流传动单元(不包含离合器)的转速与加速度的变化滞后小,系统稳定性好。

With the vehicle power split continuously variable transmission driving system as the research object, and based on the model establishment of the differential wheel system, metal Vbelt continuously variable transmission and clutch unit and the analysis of the whole vehicle subject to stress, the kinetic model for the driving system with the continuously variable transmission power split driving unit as the core is established in combining with the 3 stages of clutch working process in this paper. Also, the motion and dynamic analysis as well as the simulation of its instantaneous responses are conducted. The simulated results indicate that in the initial starting stage, the vehicle equipped with the power split continuously variable transmission system is of better accelerating performances, and that the variation delay of the rotating velocity and acceleration of continuously variable transmission power split driving unit （ without including clutch ） in the process of clutch coupling is so small that the system is of good stability performances.