电控机械式自动变速器液压换挡执行机构设计

在电控机械式自动变速器的设计中，换挡执行机构的设计是重点和难点，其性能的优劣，将直接影响整车的平顺性、舒适性和安全性。以某5挡手动变速箱为基础，根据换挡执行机构的设计要求，开发设计了一款电控液压式换挡执行机构。对液压系统进行了分析，设计了该换挡执行机构的液压系统，并对液压系统的主要元件进行了计算和选型；根据该换挡执行机构、液压原理图和选换挡液压缸分析了该换挡执行机构的工作过程；实际制作了该选换挡执行机构，并对对应的5挡MT变速器进行了AMT改造。试验表明：该选换挡执行机构能够实现该5挡变速箱的选挡和换挡，并且结构简单、定位准确、反应灵敏，换挡品质安全可靠，具有较好的推广应用价值。

Design on Hydraulic Shift Actuator of Automatic Mechanical Transmission

The design of hydraulic shift actuator is emphasis and difficulty of automatic mechanical transmission (AMT), and the performance of hydraulic shift actuator directly affects the ride performance, comfort and safety of automobiles. Based on a five-speed manual transmission, a hydraulic shift actuator was designed. The hydraulic system of the shift actuator was designed, the main hydraulic components were selected according to the design calculation, and the work process of the shift actuator was described in detail.The shift actuator was practically manufactured, and the 5-speed manual gearbox (MT) was transformed into AMT. The result shows that this hydraulic shift actuator can complete choosing and changing gear gently of the five speed gearbox, and this structure is simple, accurate positioning, sensitive respond, and its shift quality is safe and reliable. This shift actuator will be worth application and dissemination.