Control device for vehicle drive device

A control device configured to control a vehicle drive device in which a disconnecting engagement device, a rotary electric machine, and a speed change mechanism are provided on a power transfer path connecting between an internal combustion engine and wheels and are arranged in this order from the internal combustion engine toward the wheels and the speed change mechanism is configured to switch between a plurality of shift speeds on the basis of control of respective states of engagement of a plurality of shifting engagement devices provided in the speed change mechanism, the control device comprising:

• a starting control section configured to execute internal combustion engine starting control in which the internal combustion engine in a stationary state is started while causing the disconnecting engagement device to transition from a disengaged state to a direct engagement state;
• a timing decision section configured to decide, on the basis of a rotational speed of the internal combustion engine, a supply start timing to start supply of a hydraulic pressure to a specific engagement device, which is one of the plurality of shifting engagement devices and is caused to transition from a disengaged state to a direct engagement state in order to establish a target shift speed for the speed change mechanism after a change, in the case where the target shift speed is changed during execution of the internal combustion engine starting control;
• a first required time calculation section configured to calculate a first required time on the basis of a current rotational speed and rotational acceleration of the internal combustion engine, the first required time being a time until the rotational speed of the internal combustion engine reaches a post-shifting synchronous rotational speed which is a rotational speed of an input-side rotary member with the target shift speed after the change matching a rotational speed of the wheels, the input-side rotary member being a rotary member in the speed change mechanism that is the closest to the internal combustion engine along the power transfer path;
• and
• a second required time calculation section configured to calculate a second required time which is a calculated time from when supply of a hydraulic pressure to the specific engagement device is started until the specific engagement device starts generating a transfer torque capacity,
• wherein the timing decision section is configured to compare the first required time and the second required time, and decides a timing when it is determined that the first required time has become equal to or less than the second required time as the supply start timing.