Transmission shift control strategy based on shift quality

LIU Jianmin1, YU Ying1, HE Shaohua2, ZHOU Ping2

(1.School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China;
2.The First Engineering Scientific Research Institute of the General Armaments Department, Wuxi 214035, China)

Abstract: Aiming at the phenomenon of transmission electrohydraulic control system and power shift, research on transmission shift control (clutch pressure regulating system) and the evaluation indexes of shift quality was carried out, dynamic models on start and shift process were established, and factors influencing the shift shock (oil feeding process of the clutch) were analyzed. A new method of shifting control strategies were proposed under results which the shift quality was considered. Finally, a Matlab/Simulink simulation on shifting control based on shift quality was conducted. The correctness of method was verified by comparison to the theoretical curve. The results indicate that shift control strategy based on shift quality is proven to up to expectations that effectively reduce shift shock and improve ride comfort.

Key words: electrohydraulic control; shift quality; control strategy; simulation