Vehicular automatic transmission apparatus

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 said towing state presumption means seeks a travelling road surface slope in a non-towing state based on a throttle opening amount and changes in vehicular speed, and presumes the existence of a towing state from said travelling road surface slope.

A vehicular control apparatus for a 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 said vehicle is stopped while it is presumed by said towing state presumption means that said vehicle is in a towing state and driving is thereafter resumed, the presumption as to said vehicle's towing state is carried out based on a decrease in a transmission oil temperature during the period that said vehicle is stopped.