车辆换档用2D数字缓冲阀的研究

传统的车辆换档液压缓冲阀主要依靠节流小孔以及弹簧的相互作用来控制离合器内油液的压力，使其在一段时间内缓慢的上升，但其调节灵活度低，适应性较差，为此首次提出采用2D数字技术应用于车辆换档缓冲领域，设计2D数字缓冲阀，利用2D数字先导阀芯产生的推力推动主阀芯运动，进而控制缓冲阀出口的油液压力。介绍2D数字缓冲阀的结构和工作原理，并建立2D数字缓冲阀的数学模型，利用Matlab和AMESim对其模型进行联合求解，最后进行仿真分析和试验研究。研究结果表明：2D数字缓冲阀的线性度为9.25%，滞环为0.106；2D数字缓冲阀输出油压实现了换档过程中离合器内油压的变化要求，其缓冲特性的控制精度达到10.52%；缓冲阀的仿真和试验结果趋势是一致的，验证了联合仿真模型的正确性。

Research on 2D Digital Buffering Valve for Vehicle Shift

The traditional hydraulic buffering valve for vehicle shift mainly relies on the interaction of the throttling orifice and the spring to control the pressure of the oil in the clutch. For the low adjustment flexibility and poor adaptability, it is the first time to propose the use of 2D digital technology in the field of vehicle shift. 2D digital buffering valve is designed. The thrust generated by the 2D digital pilot valve is used to drive the movement of the main spool, and then the pressure of the valve outlet oil is controlled. The structure and working principle of 2D digital buffering valve are introduced. A mathematical model of 2D digital buffering valve is established. Matlab and AMESim are used to solve the model, and simulation analysis and experimental study is carried out finally. The research indicates:Its linearity is 9.25%, and its hysteresis is 0.106. The pressure the 2D digital buffering valve outputed can satisfy the requirement pressure within the clutch during the shift. And the control accuracy reaches 10.52%. The simulation results of the buffer characteristics are consistent with the experimental results, and the correctness of the simulation model is verified.