Vehicular drive unit technical field

A vehicular drive unit comprising:

• an internal combustion engine;
• a first rotating electrical machine;
• an output portion which transmits power to driving wheels of a vehicle;
• a second rotating electrical machine;
• a first differential mechanism which includes mutually differentially rotatable three rotating elements, the internal combustion engine being connected to a first rotating element which is one of the three rotating elements and the first rotating electrical machine being connected to a second rotating element which is another one of the three rotating elements;
• a second differential mechanism which includes mutually differentially rotatable three rotating elements, the output portion being connected to a first rotating element which is one of the three rotating elements and the second rotating electrical machine being connected to a second rotating element which is another one of the three rotating elements;
• a connecting member which connects a third rotating element which is a remaining one of the three rotating elements of the first differential mechanism and a third rotating element which is a remaining one of the three rotating elements of the second differential mechanism with each other such that the third rotating elements may integrally rotate;
• and
• an engaging device capable of switching between a fixed state in which the third rotating element of the first differential mechanism and the third rotating element of the second differential mechanism which are connected to each other are locked with respect to a fixing member and a released state in which the locked state is released.