Patent ID: 7470212

Claim:
A shift control apparatus for an automatic transmission having an input shaft connected to an engine and which downshifts in a power-off state in which an accelerator opening is substantially zero, comprising: an engine control unit which increases torque output of the engine by a predetermined amount after lapse of a predetermined period of time after the start of the downshift; a plurality of engine output increase control maps which differ depending on the type of the downshift; and a recognition unit which recognizes the type of the downshift; and wherein the downshift is performed by releasing a frictional engagement element by release control of release side hydraulic pressure, and applying a frictional engagement element by apply control of apply side hydraulic pressure; wherein the plurality of engine output increase control maps are stored in the engine control unit, the engine output increase control maps differing depending on the type of the downshift and having different predetermined periods of time for starting the engine output control and different predetermined amounts of torque increase in engine output correlated with the different types of downshift, wherein the amounts of torque increase are predetermined based on rotational speed of the input shaft, which rotational speed is based on gear ratio, and wherein the times for starting the engine output control are set to match the end of a predetermined delay time for reduction in release side hydraulic pressure following the start of shift control; and wherein the engine control unit selects and executes one of the stored engine output increase control maps according to the downshift recognized by the recognition unit.