The process which is judged whether power on 23 rise shift control

摘要

PROBLEM TO BE SOLVED: To provide a variable speed control system which variable speed is stably made possible to perform by releasing hydraulic pressure of a clutch element on releasing side, when the hydraulic pressure of the clutch element on combining side rises appropriately, while appropriately controlling the hydraulic pressure of the clutch element on the releasing side, according to the condition of input torque, when the variable speed of up-shift from 2-3 speed stage by power-on is controlled as well as to provide a method of controlling the variable speed.;SOLUTION: The method of controlling up-shifting of 2-3, by power-on in an automatic transmission comprises a step of deciding if the condition of up-shifting of 2-3 by power-on is detected and step of executing the variable speed control of the up-shifting, by extracting initial hydraulic control duty to a friction element on combining side and hydraulic control duty each input torque to the friction element on releasing side from map table, if the condition of up-shifting of 2-3 by power-on is detected, and step of completely releasing hydraulic pressure of the friction element on the releasing side, when the hydraulic pressure of the friction element on combining side fully endures to turbine torque.;COPYRIGHT: (C)2005,JPO&NCIPI