多片湿式离合器优化设计

Optimal design of clutch in automatic transmission

针对自动变速器多片湿式离合器的热失效现象,结合离合器设计公式,选择接合终了时刻摩擦面上的平均滑摩功和单位面积最大滑摩功率作为优化设计目标,把离合器的转矩容量计算作为整体转化为约束条件,使用MATLAB中的优化工具箱,采用模糊理论和主要目标法进行离合器优化设计.利用多学科动力学仿真软件平台Simulation X对优化前后的离合器动态接合过程中的热性能指标进行对比仿真,通过优化算例验证了优化设计方法的合理性.

For commonly used wet multi-plate clutch in automatic transmission（AT）,completed the optimized design of the clutch using fuzzy theory and main objective method with optimization toolbox of MATLAB.According to clutch design formula,the optimal design mathematic model was set choosing average energy loss in sliding friction surface at the end time of bonding and the max power loss per area as the optimized object and turning clutch torque capacity calculated as a whole into a constraint condition.Also the dynamics implementation simulation model with multi-disciplinary dynamic simulation software platform Simulation X was set.Through the model,the change of the relative thermal index after optimized could be truly reflected,and the operation characters of clutch are heightened.