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针对搭载机电式无级自动变速(Electric-mechanic continuously variable transmission,EMCVT)混合动力传动系统结构,采用枚举法分析了系统工作模式,将系统模式切换过渡工况归纳为发动机介入传动系统和退出传动系统两种情况。分别制定了两种情况下的控制逻辑和各阶段的控制目标,提出了发动机、电机、EMCVT和离合器综合协调控制的过渡工况控制策略。根据系统结构,建立了各关键部件的动力学模型,在MATLAB/SIMULINK仿真平台上,搭建了系统过渡工况控制仿真模型,分别针对发动机介入传动系统和退出传动系统两种情况进行了仿真。仿真结果表明,采用所提出的控制策略能大大降低系统冲击,提高模式切换品质,为机电控制CVT的应用提供理论参考。
Aiming at the structure of electro-mechanic continuously variable transmission (EMCVT) hybrid powertrain system, the operating mode of the system is analyzed by enumeration method, and the transition mode of system mode switching is summarized as the engine intervention transmission system and the exiting transmission System two cases. The control logic and the control objectives of each stage are formulated respectively in two cases. The transition condition control strategy is proposed for the integrated control of engine, motor, EMCVT and clutch. According to the system structure, the dynamic model of each key component is established. On the MATLAB / SIMULINK simulation platform, the simulation model of the system transition condition control is built. The simulation is carried out for both the engine intervention drive system and the exit drive system. The simulation results show that using the proposed control strategy can greatly reduce system impact and improve the quality of mode switching, providing a theoretical reference for the application of electromechanical control CVT.