Study on the Influence of Machining Deviation of Vehicle Automatic Transmission Shifting Control Components on Calibration Parameters

Abstract

Abstract An automatic transmission (AT) shift control model was completed by commercial code Simulation X based on AT shift control system mechanism. The AT shift process under condition of varied machining deviation was analysed by virtual calibration method based on this AT shift model. The results show that the machining deviation of AT shifting control component causes effect on the shift quality, especially affecting the shift impact during the shift process. The machining deviation is larger, accordingly the calibrated parameters such as the hydraulic pressure gradient and the control time increase. It is helpful to improve the shift quality to set the suitable calibration parameters of clutch shift according to different machining deviation.