Patent ID: 8506451

Claim:
A vehicle drive device including an input member drivably coupled to an internal combustion engine, an output member drivably coupled to wheels, an intermediate member provided on a power transfer path connecting between the input member and the output member and drivably coupled to a first rotary electric machine, a friction engagement device capable of releasing drivable connection between the input member and the intermediate member, and a control device, wherein the control device includes: a synchronized engagement control section that, when an internal combustion engine start condition for starting the internal combustion engine which has been stationary is established with the friction engagement device in a disengaged state, engages the friction engagement device in a synchronized state, in which a rotational speed difference between the input member and the intermediate member is equal to or less than a predetermined value, to bring the friction engagement device into a directly engaged state; a start control section that raises a rotational speed of the input member using torque of the first rotary electric machine with the friction engagement device in the directly engaged state to start the internal combustion engine; and an alignment control section that, in an internal combustion engine rotating state in which a rotational speed of the internal combustion engine is equal to or more than a predetermined value, performs alignment operation in which an engagement pressure of the friction engagement device is reduced and in which the friction engagement device is returned to the directly engaged state upon detecting that the rotational speed difference reaches a rotation difference threshold.