【摘要】 本文研究了设计参数对液压机械式无级变速器离合器接合过程的影响。首先,使用SimulationX软件开发了动力传动系的模型,并使用离合器换档实验验证了模型的正确性。然后,将摩擦系数函数与测试数据进行拟合,得出适用于本文的摩擦系数模型。最后,基于摩擦力矩和摩擦力的评价指标,对两组设计参数(油压和摩擦系数)进行了仿真,并从理论上解释了变化规律。根据仿真结果,高油压和摩擦系数可以缩短打滑时间。大的油压可以增加峰值扭矩,但是摩擦系数对峰值扭矩的影响不是很大。摩擦力在3.2 s达到最大值,峰值随着油压和摩擦系数的增加而增加。油压对离合器接合和热性能的影响大于摩擦系数。该研究可为离合器的工作可靠性研究提供参考。更多还原

【Abstract】 The effect of the design parameter on the clutch engagement process of the hydro-mechanical continuously variable transmission(CVT) was investigated. First, the model of the power train was developed with the software of SimulationX, and the clutch shift experiment was used to validate the correctness of the model. Then, the friction coefficient function was fitted with the test data to get the friction coefficient model suitable for this paper. Finally, based on the evaluating index of the friction torque and the friction power, two groups of design parameters(oil pressure and friction coefficient) were simulated and explained the changing regulation theoretically. According to the simulation results, the high oil pressure and friction coefficient can reduce the slipping time. The large oil pressure can increase the peak torque but the effect of friction coefficient on the peak torque is not so significant. The friction power reaches the maximum value at 3.2 s, the peak value increases as the oil pressure and friction coefficient increase. The effect of the oil pressure on the clutch engagement and thermal performance is greater than the friction coefficient.更多还原