| 摘要 |
In a shift control method for an automatic transmission, it is first determined if an N-N-2 kickdown signal is input, then if is determined if a real shifting time reaches a standard shifting time when the N-N-2 kickdown signal is input. Next, it is determined if a turbine rpm variation is greater than a target turbine rpm variation at a shifting point when the actual shifting time reaches the standard shifting time, and it is determined if overrun occurs at friction elements to be engaged when the turbine rpm variation is greater than the target turbine rpm variation. Next, a hydraulic fluid control duty ratio is learned by adding a predetermined value to a current duty ratio when the overrun occurs, then it is returned to a main routine. |
