| 摘要 |
PURPOSE: To accurately judge starting time of feedback control or the like of working pressure by judging it as a change in turbine rotating speed by speed change is started when prescribed time passes after a speed change command is outputted and an absolute value of a rate of change of turbine rotating speed becomes larger than a prescribed value. CONSTITUTION: In a controller 300 to output a speed change command to an oil pressure control circuit 100 by inputting various sensor signals, after the speed change command is outputted, whether or not a rate of change of turbine rotating speed detected by a turbine rotation sensor 305 exceeds a prescribed value is judged. When it is judged as yes, next, when prescribed time passes after the speed change command is outputted, it is judged as an inertia phase is started, and feedback control is started. Therefore, that an apparent increase in turbine rotating speed caused by rolling of a transmission generated just after output of the speed change command is misjudged as a start of the inertia phase, is avoided, and the feedback control can be started at right time. |
