分析了无动力中断机械式变速器的换挡原理，建立了换挡过程的动力学模型，设计了针对该变速器的基于离合器扭矩容量预先控制的换挡策略．基于Matlab /Simulink 软件，建立了该变速器的仿真模型，并以包括冲击度和滑磨功两个参量在内的最优换挡品质为目标，应用单纯形法和遗传算法等对换挡过程中节气门开度的控制参数进行了优化．仿真结果表明，采用所设计的控制策略和优化后的控制参数，无动力中断机械式变速器换挡过程中的换挡冲击和离合器滑磨可得到良好控制，实现动力的持续和平稳输出．

In this paper,the shift principle of mechanical transmission without torque interrupt is analyzed,and a dynamic model describing the shift process is established. Then,a shift strategy for the transmission under discussion is proposed based on the prearranged control of clutch torque capacity. Moreover,a simulation model of the transmission is set up with the Matlab /Simulink software. Finally,for the purpose of optimizing the shift quality in terms of jerk and slipping work,the control parameters of throttle opening during the shifting is calculated by using the the simplex method and the genetic algorithm. Simulated results indicate that,with the adoption of the designed control strategy and the optimized control parameters,both the shift shock and the clutch slip during the shifting are successfully controlled,and a continuous and smooth power output is thus secured.