自动变速器闭锁策略设计

Lockup Strategy Design of Automatic Transmission

摘要:

分析液力变矩器在闭锁过程中的动力传递特性,建立其动力学模型;从提高整车动力性出发,综合考虑发动机扭矩输出特性,设计动力性3参数闭锁规律;建立离合器油压优化模型,基于蚁群算法,得到闭锁离合器油压变化规律.以Matlab /Simulink/Stateflow为平台,建立发动机、液力变矩器、变速器以及车辆纵向动力学仿真模型,验证闭锁策略.结果表明,动力性闭锁规律提高了整车动力性,闭锁过程中车辆无冲击或动力间断.

Abstract:

Power transfer characteristics of the torque converter in the locking are analyzed,and the dynamic model of torque converter is built up.Based on a comprehensive consideration of the output torque characteristic of engine,three-parameter dynamic lockup control rule is designed to promote automotive power performance.Optimization model of clutch oil pressure is also established,and based on ant colony algorithm,the variation of lockup clutch oil pressure is obtained.With the Matlab/Simulink/ Stateflow software,the lockup strategy is verified.A conclusion is drawn that the dynamic lockup control rule promotes vehicle power performance without impact or power interrupt in the locking.