Power transmission control device for vehicle

A power transmission control device for vehicle comprising:

• an electric rotating machine that is mounted on an internal combustion engine and functions as an electric motor and a generator;
• a crank pulley that is mounted on a crankshaft of said internal combustion engine and drives said electric rotating machine by power transmission means;
• a planetary gear mechanism consisting of a sun gear coupled to said crank pulley, a planetary gear supported on a carrier coupled to said crankshaft, and an internal gear controlled to be either a constraint state or a non-constraint state by means of an electromagnetic clutch;
• and
• control means that controls said electric rotating machine and said electromagnetic clutch;
• wherein, at the time of starting said internal combustion engine, said control means turns said electromagnetic clutch ON thereby causing said planetary gear mechanism to function as a reduction mechanism, and drives said internal combustion engine using said electric rotating machine as an electric motor;
• and
• when said internal combustion engine is in a state of being not higher than a predetermined engine speed and, furthermore, a remaining capacity of a battery, which is electrically supplied from said electric rotating machine, is not more than a predetermined level or an electrical load is in a high-load state after said internal combustion engine has been started, said control means causes said planetary gear mechanism to function as a speed increasing mechanism by maintaining the ON state of said electromagnetic clutch, and drives said electric rotating machine acting as a generator at an increasing speed.