Cooling system for vehicle driving apparatus

A cooling system for a driving apparatus that is provided in a vehicle for driving the vehicle,

• said cooling system comprising:
• a first pump that is to be mechanically driven accompanying with running of the vehicle, to eject lubricant;
• a lubricating passage configured to supply the lubricant ejected from said first pump, to a lubrication-required part of the driving apparatus;
• a second pump that is to be driven by a second drive source that is other than a first drive source of said first pump, to eject the lubricant;
• a cooling passage configured to supply the lubricant ejected from said second pump, to a rotary electric machine of the driving apparatus via a heat exchanger that is provided in said cooling passage;
• a connecting passage that connects between said lubricating passage and a connected portion of said cooling passage, said connected portion being located on an upstream side of said heat exchanger in a direction of flow of the lubricant;
• and
• a lubricant distribution portion provided in said connecting passage, and configured to change a connecting-passage flowing amount of the lubricant that flows through said connecting passage, depending on a temperature of the lubricant ejected from said first pump, such that a ratio of the connecting-passage flowing amount of the lubricant to a lubricating-passage flowing amount of the lubricant that flows through said lubricating passage is increased with increase of the temperature of the lubricant ejected from said first pump.