Steuerungsvorrichtung für Automatikgetriebe

摘要

An automatic transmission control apparatus with which no state of slipping engagement of the first clutch is created in a neutral control state and as a result the vehicle is not subjected to idling vibration and the fuel consumption reducing effect of the neutral control state is not diminished and there is no heating and consequent reduction of the durability of the frictional material of the clutch. There are provided a fluid power transmission device 121, a clutch C which is engaged when a forward range is selected, a hydraulic servo 91, an input side speed sensor 491 for detecting the input side speed of the fluid power transmission device 121, an output side speed sensor 471 for detecting the output side speed of the fluid power transmission device 121, and a control apparatus 94. The control apparatus 94 has differential speed calculating means 941, differential speed change judging means 942, pressure increasing means 944 for increasing the hydraulic pressure of the hydraulic servo 91 by a set pressure when the differential speed has not changed, and pressure reducing means 945 for reducing the hydraulic pressure of the hydraulic servo 91 by a set pressure when the differential speed has changed.