METHOD FOR LEARNING POWER ON DOWNSHIFT OF AUTO-TRANSMISSION OF VEHICLE

摘要

The present invention discloses a power on down shift learning method of an automatic transmission of a vehicle. According to the present invention, there is provided a control system for a turbine, which comprises a control unit for a vehicle equipped with an automatic transmission, for performing a run-up or tie-up operation of the turbine speed based on a result of comparison between a turbine revolution number supplied from the outside and a synchronized revolution number of a target shift position, And determines whether the cause of the run-up is the run-up occurring after the synchronization point. If the run-up is after the synchronization point, the maximum value of the turbine speed change rate received after the synchronization point and the run- Up learning value before the synchronization point is derived based on the maximum value of the turbine speed change rate and the run-up occurrence time in the case of the run-up before the synchronization point based on the time, As a result of deriving the tie learning value based on the rate of change, Turbine rotation due to the engagement side element number learning value of the positive component of the run-up to the run-up control upon occurrence of preventing shift shock caused by the run-up from occurring and to obtain an effect that can further improve the reliability of the automatic transmission.