Controller of automatic transmission

摘要

A controller of an automatic transmission which allows to improve a durability of frictional engage elements and to shorten a gear change time even when a jumped gear change is made is provided. The controller of the automatic transmission of the present invention comprises a first hydraulic servo to which oil is supplied to make a jumped gear change, a second hydraulic servo to which oil is supplied to make a gear change to an intermediate gear change step, a limited oil supplying circuit created going through oil amount limiting means, a quick oil supplying circuit created without going through the oil amount limiting means and pressure governing means for governing a line pressure under a controlled pressure to supply oil under the controlled pressure to the quick oil supplying circuit. Oil path switching means switches the limited oil supplying circuit and the quick oil supplying circuit to supply oil to the first hydraulic servo or the second hydraulic servo. Accordingly, when the jumped gear change is made, oil is supplied to the first hydraulic servo via the quick oil supplying circuit and the operating pressure can be increased quickly, so that the gear change time may be shortened.