Patent ID: 8550947

Claim:
A speed change device, comprising: an input member drivably coupled to an internal combustion engine and a rotary electric machine each serving as a drive force source for a vehicle; an output member drivably coupled to wheels; and a speed change mechanism including a plurality of friction engagement elements, a plurality of shift speeds being established in accordance with respective engagement states of the plurality of friction engagement elements, the speed changing mechanism being connected to the input member and transferring rotation of the engine and the rotary electric machine transferred to the input member to the output member with a speed of the rotation changed with a speed ratio of each of the plurality of shift speeds, wherein: a slip travel mode is provided in which the vehicle is run while transferring torque from the input member to the output member with one of the plurality of friction engagement elements being caused to slip, the slip travel mode including an engine electric power generation mode in which the vehicle is run while the rotary electric machine is generating electric power using the drive force of the engine, and a slip engagement element, which is the friction engagement element caused to slip in the slip travel mode, is the friction engagement element to be engaged commonly for establishment of at least a forward start shift speed, which is one of the shift speeds to be used for forward start, and a reverse start shift speed, which is one of the shift speeds to be used for reverse start, the slip engagement element being the friction engagement element caused to slip in the engine electric power generation mode.