Power transmission unit

A power transmission unit, comprising:

• an input shaft;
• a first rotary machine;
• a differential mechanism comprising a plurality of rotary elements connected to one another while being allowed to rotate in a differential manner, the plurality of rotary elements including an input element connected to the input shaft, a reaction element connected to the first rotary machine, and an output element connected to an output shaft;
• a first engagement device that brings a first movable member connected to the input element in a torque transmittable manner into engagement with a first engagement section formed on a first another one of the plurality of rotary elements;
• and
• a second engagement device that brings a second movable member connected to the output element in a torque transmittable manner into engagement with a second engagement section formed on the first another one or a second another one of the plurality of rotary elements, wherein:
• the input shaft, the first rotary machine, the differential mechanism, and the output shaft of the differential mechanism are arranged coaxially,
• the power transmission unit further comprising:
• a drive gear that is mounted on at least any one of the input element and the output element;
• a driven gear that is meshed with the drive gear;
• and
• an oil pump that is connected to the driven gear in a torque transmittable manner, and
• the first engagement device and the second engagement device are arranged on radially outer side of the differential mechanism.