| 摘要 |
PURPOSE:To more properly set the initial oil pressure in a release side, so that a speed change of small shock can be always executed, by learning- correcting the initial oil pressure of a shift in the release side of a magnetic field based on a rotational speed of a rotary member before starting feedback control, after starting the shift in the release side. CONSTITUTION:A central processing unit 104 inputs a signal of a C2 sensor 120 for detecting a drum rotational speed (speed change progress condition of the first transmission part 60) Nc2 of a clutch C2 and a signal of a C0 sensor 121 for detecting a drum rotational speed (speed change progress condition of the second transmission part 40) Nc0 of a clutch C0. Before changing a tilt of Nc0 by feedback control after starting a low gear shift, Nc0s (first rotational speed) is monitored to obtain a difference alphaNc0s between this first rotational speed and a target value Ncos at this time, and a logic for judging and correcting a high/low value of initial duty ratio DS by a level of this difference is added. |
