机电控制CVT电控电动执行机构参数设计方法（双语出版）

为了使机电控制无级变速器（CVT）能够可靠地传递转矩，快速地调节速比，结合某车型的结构性能参数，对机电控制CVT电控电动执行机构的设计方法进行研究。首先，对机电控制CVT电控电动执行机构的结构和工作原理进行分析，说明电控电动执行机构对CVT速比和从动带轮夹紧力的调节方法，从运动学和动力学的角度研究从金属带式无级变速器的传动机理，获得速比与主动带轮可动盘位移的关系以及保证主、从动带轮可靠传递转矩所需要的夹紧力；然后，根据整车的结构性能参数，明确汽车对机电控制CVT的功能需求和性能要求，以电控电动执行机构中直流电动机的负载转矩最小为目标，设计确定各碟形弹簧的参数和组合形式，在此基础上确定电控电动执行机构中电动机械传动系统的结构性能参数；最后，为验证所设计电控电动执行机构参数的正确性，利用所建立的机电控制CVT传动系统模型在ECE工况下对电控电动执行机构的性能进行仿真分析。结果表明：相对传统CVT液压执行机构，在ECE工况下机电控制CVT电控电动执行机构消耗的能量减少52.2%，同时设计的电控电动执行机构在ECE工况下能够实现实际夹紧力和速比对目标值的良好跟随。

Electric Actuator Parameter Design for Electro-mechanical Continuously Variable Transmission（in English）

To enable an electro-mechanical continuously variable transmission (EMCVT) to transmit torque highly efficiently and adjust speed ratio quickly, a parameter design method of the EMCVT electric actuator was studied according to the structural performance parameters of the vehicle. First, the structure and operating principle of the electric actuator was analyzed, and the ratio and driven pulley clamping force control methods were illustrated. Additionally, the continuously variable transmission (CVT) mechanism was analyzed from points of kinematics and dynamics, and the relation between the CVT ratio and the displacement of the driving pulley movable sheave was determined. The desired driving and driven pulley clamping forces were determined to ensure the torque transmit. Second, the requirements for an EMCVT were analyzed according to vehicle parameters. Aiming at the minimum torque load of motors in the actuator, the parameters and combining form of Belleville springs were determined. Based on the above requirements, the parameters of the electro-mechanical transmission system in this actuator were chosen. Finally, to validate the proposed electric actuator, it was simulated using EMCVT transmission system model under ECE driving cycle. The simulation results demonstrate that the energy consumed by the proposed electric actuator was reduced by 52.2% compared with that of the hydraulic actuator under ECE driving conditions, and the actual driven pulley clamping force and speed ratio tracked the target driven pulley clamping force and the target speed ratio, respectively.