Vehicle drive device

A drive device for a vehicle, comprising:

• an input member drivingly connected to an internal combustion engine;
• a rotary electric machine;
• an output member that is configured to transmit torque from one or both of the internal combustion engine and the rotary electric machine:
• a fluid coupling;
• an engagement device that selectively switches between a state where the input member is connected with the rotary electric machine and the fluid coupling and a state where the input member is not connected with the rotary electric machine and the fluid coupling;
• and
• a case configured by assembling a plurality of housings in order to house at least the rotary electric machine, the engagement device, and the fluid coupling, wherein
• the engagement device includes an engagement member, a pressing member and a differential pressure generating chamber that is formed so as to apply hydraulic pressure toward a direction in which the engagement member is disengaged when oil is supplied to the differential pressure generating chamber,
• a body portion housing chamber housing a body portion of the fluid coupling, the body portion housing chamber and the differential pressure generating chamber are structured as oil chambers separated from each other,
• the drive device includes a coupling supply oil passage supplying oil to the body portion housing chamber and a differential pressure supply oil passage supplying the oil to the differential pressure generating chamber,
• pressurized oil that is regulated to a respective predetermined pressure level by a hydraulic pressure control device is supplied to each of the coupling supply oil passage and the differential pressure supply oil passage, and
• the differential pressure generating chamber communicate with an oil passage for discharging oil from the differential pressure generating chamber and communicates with the differential pressure supply oil passage with the differential pressure generating chamber between the oil passage and the differential pressure supply oil passage.