Controller of automatic transmission.

摘要

A controller of an automatic transmission which allows to make a gear change favorably in any traveling condition and to always obtain the best gear change characteristics is provided. The controller of the automatic transmission of the present invention comprises input torque determining means 41 for determining an input torque input to the transmission, inertia torque estimating means 42 for estimating an inertia torque corresponding to a varying speed of number of revolutions of a rotary member during gear change, input torque correcting means 43 for calculating a required operating torque by adding the input torque with the inertia torque and operating pressure control means 44 for controlling an operating pressure by corresponding to the required operating torque. Because the operating pressure corresponding to the necessary engagement torque is generated in the hydraulic servo 51, the operating pressure necessary for gear change can be generated in the hydraulic servo 51 no matter how a throttle opening and driving speed may be or the gear change is made step by step or jumped gear change is made, thus allowing to make a gear change favorably in any traveling condition and to always obtain the best gear change characteristics.