Cooling system for drive device

A drive device comprising:

• a rotary electric machine;
• a transmission mechanism that transmits power between the rotary electric machine and wheels;
• an inverter configured to drive the rotary electric machine;
• a case that houses the rotary electric machine, and the inverter and the transmission mechanism;
• an oil pump configured to discharge oil to be supplied to the rotary electric machine;
• an oils sump formed at a bottom of the case;
• and
• a catch tank disposed on the upper side of the oils sump in the case,
• wherein the oil accumulated in the oils sump is stirred by the transmission mechanism,
• the catch tank catches the stirred oil and temporarily stores the oil before it falls into the oil sump,
• wherein
• the case has a channel along which coolant flows,
• the channel includes a first heat exchange portion where heat is exchanged between the inverter and the coolant, a second heat exchange portion where heat is exchanged between the oil stored in the catch tank provided in the case and the coolant, and a turbine disposition portion where a turbine is disposed, and
• the first heat exchange portion, the second heat exchange portion and the turbine disposition portion are disposed in this order from an upstream side to a downstream side along the channel, and
• the turbine is configured to rotate by a flow of the coolant passing through the turbine disposition portion, and a pump rotor of the oil pump is drivingly connected to the turbine.