Research On Non-synchronous Lurch Starting Control Strategy Of The AMT Vehicle For The Synchronous Process

Mechanical automatic transmission(AMT)has the advantage of fuel economy,high torque capacity,technical feasibility and low manufacturing cost,which makes it become one of the development directions of the automatic transmission.However,due to ignoring the driver’s start intention and the dynamic quality of the clutch during the synchronization process of the current AMT vehicle starting control strategy,which results in a larger impact degree during the synchronization process.Therefore,based on non-synchronous lurch of the engagement process,a research on non-synchronous lurch starting control strategy of the AMT vehicle for the synchronous process is proposed.Firstly,the dynamic characteristics of the stages of the clutch joint process are analyzed,then the clutch friction torque model,the engine torque model,the vehicle running resistance moment model and the dynamic model of the clutch engagement process are established.And the experimental method of the dynamic friction coefficient of the clutch is discussed.On this basis,for the problem of the without synchronous impact control strategy which usually used in the AMT vehicle,the formation mechanism of the impact and its dynamic quality index during the simultaneous joining process of the clutch are studied.Secondly,according to the acceleration intention of the driver and the change rule of the impact degree in the synchronization phase,the acceleration intent equivalence and the sliding transition phase are introduced during the synchronization process,and an optimal control strategy for the AMT vehicle based on driver’s intention under no synchronous lurch is proposed.Thirdly,the feasibility and practicability of the control strategy are verified by simulation.Finally,based on the hardware structure of the D2 P MotoHawk rapid prototyping platform,the AMT controller based on driver’s intention AMT vehicle under no synchronous lurch start optimization control strategy is developed,the AMT controller bench test system is built,the effectiveness of the AMT vehicle starting control strategy based on the driver’s intention under no synchronous lurch is verified.