The invention discloses an AMT (automated mechanical transmission) gear shifting process control method based on multi-cone friction pair temperature prediction, which comprises the following steps of: accurately predicting the transient temperature change of a multi-cone friction pair, and determining a gear shifting control condition in combination with the thermal failure critical temperature of a multi-cone friction plate; and the maximum temperature of the multi-cone friction pair in the gear shifting process is lower than the thermal failure critical temperature by controlling the loading pressure. A finite difference method and a response surface analysis method are adopted to establish a model database for predicting the highest temperature and the maximum temperature rise of the surface of the multi-cone friction pair, and the accuracy of transient temperature field prediction is improved; finite element software is used for simulating the deformation condition of the friction plate, and the thermal failure critical temperature is determined; an early warning temperature and a safe temperature are set, and a corresponding control strategy is formulated; during gear shifting operation, allowable temperature rise is calculated, allowable loading pressure is deduced, and it is guaranteed that the temperature of the friction plate does not exceed the critical temperature; meanwhile, the model can be set for different multi-cone friction pair materials and gearbox working conditions, and has high applicability.
本发明公开了一种基于多锥形摩擦副温度预测的AMT换挡过程控制方法,包括:可以准确预测多锥形摩擦副瞬态温度变化,并结合多锥形摩擦片的热失效临界温度确定换挡控制条件,通过控制加载压力保证多锥形摩擦副在换挡过程中最高温度低于热失效临界温度。采用有限差分法与响应面分析法建立多锥形摩擦副表面最高温度和最大温升预测模型数据库,提高了瞬态温度场预测的准确性;运用有限元软件模拟摩擦片形变情况,确定热失效临界温度;设置预警温度和安全温度并制定相应的控制策略;换挡作业时计算许用温升并推导许用加载压力,以保证摩擦片温度不超过临界温度;同时,模型对于不同多锥形摩擦副材料和变速箱工况条件均可进行设定,具有较高的适用性。
AMT gear shifting process control method based on multi-cone friction pair temperature prediction
一种基于多锥形摩擦副温度预测的AMT换挡过程控制方法
2024-03-29
Patent
Electronic Resource
Chinese
IPC: | F16H Getriebe , GEARING / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung |
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