Patent ID: 6719663
Filing Date: 2004-04-13
Classification: F16H,Y10T

Abstract:
A control apparatus for a vehicular automatic transmission that has a torque converter connected to a drive source and an automatic transmission mechanism connected to an output side of said torque converter, and performs driving of a vehicle with wheels by transmitting, to the wheels, drive power from said drive source, through said torque converter and said automatic transmission mechanism,wherein said control apparatus comprises: towing mode presumption means that presumes that said vehicle is in a towing state in which the vehicle is towing a trailer based on the driving conditions of said vehicle; and a lockup engagement increase mechanism that increases the degree of engagement of a lockup clutch of said torque converter when it is presumed by said towing mode presumption means that said vehicle is in a towing state, wherein when it is presumed by said towing state presumption means that said vehicle is in a towing state, said automatic transmission mechanism is prevented from shifting into a highest speed range, and if the vehicle is being driven in the highest speed range, is shifted down into a lower speed range.