Powertrain for eco-friendly vehicle

A powertrain for an eco-friendly vehicle comprising:

• an engine;
• a first motor for driving of a vehicle or receiving power from the engine to operate as a generator;
• a first power transmission mechanism disposed between the engine and the first motor to transmit engine power to the first motor or to cut off the power transmission between the engine and the first motor;
• a second power transmission mechanism disposed between the first motor and a driving shaft of running wheels to transmit power from the first motor to the driving shaft of the running wheels or to cut off the power transmission between the first motor and the driving shaft of the vehicle wheels;
• and
• a second motor connected to the second power transmission mechanism via a third power transmission mechanism to transmit power to the second power transmission mechanism, the second motor outputting power for driving the vehicle and transmitting power to the driving shaft of the running wheels through the third power transmission mechanism and the second power transmission mechanism,
• wherein a first charge depletion mode is implemented in which only power of the second motor is transmitted to the driving shaft of the running wheels through the third power transmission mechanism and the second power transmission mechanism during disengagement of the power transmission between the engine and the first motor by the first power transmission mechanism and during disengagement of the power transmission between the first motor and the driving shaft of the running wheels by the second power transmission mechanism.