Analysis of Dynamic Characteristics of Clutch-to-Clutch Shifting Controlof an Automatic Transmission

Sensors & Transducers

Dong Peng¹  Cui Liangyi²  Fu Yanxiao²  Xu Xiangyang² 

[1] Ruhr-University Bochum, Germany;School of Transportation Science & Engineering, No. 37, Xueyuan Road Haidian District Beihang University Beijing, 100191, China ;

关键词: Automatic Transmission;    Dynamic simulation;    Shifting process;    Shifting Control;    Control strategy.;   

DOI  :  

来源: DOAJ

【 摘 要 】

The fact that requirements for shift quality in automatic transmissions have been increasing rapidly necessitates the establishment of a suitable shifting control strategy in order to facilitate smoothness of different processes. For this very purpose, this paper introduces a simulation model of an 8-speed automatic transmission for front-drive vehicles with respect to detailed shifting strategies and relative parameters. An impact function can be used to reduce the transmitted torque of the oncoming shift elements before synchronization point in order to damp the impact and thus make the gear shifting process more smooth. This paper makes a systematic introduction of the structure of 8AT, theoretical basis of control strategy, the establishment of the simulation model and the comparison between test results and simulation results. The conclusion shows that with parameters well calibrated, engine torque transferring and speed synchronizing process will be smoother, which helps realizing the ultimate goal of better shift quality with higher efficiency, lower shift loads and improved shifting comfort.

【 授权许可】

Unknown