| 摘要 |
PURPOSE:To prevent increase of fluctuating power loss by increasing a response delay time of a feedback control system of a first control device to regulate a torque capacity control pressure during duty control of a control valve of a second control device to generate a control oil pressure. CONSTITUTION:In a power transmission for a vehicle, a first control device regulates a torque capacity control pressure by feedback control to eliminate deviation between a desired pressure of the torque capacity control pressure determined in accordance with a vehicle condition, and an actual torque capacity control pressure. A second control device duty-controls a control valve to generate a control oil pressure for controlling a subject of control. In this case, when the control valve is determined to be under duty control by a determining means, a response delay time of a feedback control system of the first control device is increased by a response delay increasing means. Control of the torque capacity control pressure is thus stabilized, need of setting the torque capacity control pressure high is eliminated, and increase of power loss is prevented. |
