| 摘要 |
PURPOSE: A shift control method in power-on upshifting of a biaxial automatic transmission in a vehicle is provided to cut down development expenses and production cost by realizing 6 speed ranges with controlling the main shift unit and a sub shift unit simultaneously. CONSTITUTION: A main shift unit of a first shaft and a sub shift unit of a second shaft start shifting in commanding shifting(S100,S110,S120). The shift start duty of the second shaft is output, and the desired input rpm change rate of the feedback control of the second shaft is set in starting shifting of the second shaft(S130,S140,S150). The shift start duty of the first shaft is output, and the desired input rpm change rate of the feedback control of the first shaft is set in starting shifting of the first shaft(S160,S170,S180). Feedback of each shaft is controlled according to the first shaft target value from difference between input rpm and output rpm and the second shaft target value from turbine rpm change rate. Shifting of the second shaft is finished in finishing shifting of the first shaft.
|
