CONTROLLER FOR AUTOMATIC TRANSMISSION AND METHOD FOR CONTROLLING AUTOMATIC TRANSMISSION

摘要

An ECU performs in-neutral control when a first clutch is put into a semi-engagement state based on the execution of the neutral control. Further, during the in-neutral control, the ECU detects an engine revolution Ne and an input shaft revolution Nc1 (steps S21 and S22), while detecting a pre-hydraulic-variation differential revolution Nb (steps S23 and S24). Subsequently, the ECU depressurizes the operating hydraulic pressure for a hydraulic servo by a first hydraulic pressure D1 when detected pre-hydraulic-variation differential revolution speed Nb exceeds a first differential revolution threshold KN1 (step S29).