Patent ID: 8423222

Claim:
A vehicle drive device, comprising: an input member drivingly coupled to an internal combustion engine; an output member drivingly coupled to wheels; a first rotating electrical machine; a second rotating electrical machine; a differential gear unit having at least three rotating elements; and a control device; and a one-way clutch that restricts negative rotation of the input rotating element, wherein the first rotating electrical machine, the input member, and the output member are respectively drivingly coupled to the different rotating elements of the differential gear unit with none of the rotating elements of the differential gear unit other than the coupled rotating element interposed therebetween, the second rotating electrical machine is drivingly coupled to one of the rotating elements of the differential gear unit other than the rotating element to which the first rotating electrical machine is drivingly coupled and an input rotating element, which is the rotating element to which the input member is drivingly coupled, with none of the remaining rotating elements of the differential gear unit interposed therebetween, and the control device includes a rotation change detecting portion that detects an output rotation abrupt change state in which an absolute value of rotational acceleration of the output member is equal to or larger than a predetermined value, and a restriction avoidance control portion that executes, if the output rotation abrupt change state is detected in a low rotation state in which a rotational speed of the input rotating element is lower than a predetermined control threshold value, restriction avoidance control in which a rotational speed of the first rotating electrical machine is controlled so that the rotational speed of a input rotating element becomes equal to or higher than the control threshold value.