A two dimension mathematical model is developed which is used to calculate thermal field of the shifting clutch in the automatic transmission,the results are calculated by finite differential method and the theoretical basis for designing and updating of the shifting clutch in the automatic transmission is proposed by the analysis and discussion.

This article analysizes the composition and principles of the representative FORD AXOD E automatic transmission and its electronic control system,introduces the fault diagnosis methods of the system and tells us how to operate and maintain this transmission correctly.

The goal of this thesis is to study and develop some essential control technologies and simulation system of automatic transmission.

Al4 automatic gearbox is the automatic gearbox of whole electronic control that French CITROEN company s and Chinese Shenlong company s series car adopts.

by Allison Company,for an example,this paper analyses the operation principle of automatic gearboxes and the control process of automatic gear shifting.

However, it is the control algorithm that plays the most important role in the core of the automatic gearbox, which is called the electronic control unit (ECU).