Power transmission apparatus for vehicle

A power transmission apparatus for a vehicle, the power transmission apparatus comprising:

• a first input shaft connected to an engine;
• a second input shaft enclosing the first input shaft without rotational interference with the first input shaft and selectively receiving torque of the engine through a first clutch;
• a third input shaft enclosing the second input shaft without rotational interference with the second input shaft and selectively receiving the torque of the engine through a second clutch;
• a first power delivery shaft disposed in parallel with the second input shaft;
• a first shifting member configured to receive the torque of the engine from the second input shaft, to change the torque of the engine into first and second preliminarily shifted torques, and to output the first and second preliminarily shifted torques;
• a second shifting member configured to receive the torque of the engine from the third input shaft, to change the torque of the engine into third and fourth preliminarily shifted torques, and to output the third and fourth preliminarily shifted torques;
• and
• a third shifting member configured to change the torque of the engine selectively transmitted from the first input shaft and the first preliminarily shifted torque to the fourth preliminarily shifted torque selectively transmitted from the first shifting member or the second shifting member into eleven forward speed stages and one reverse speed stage, and to output the eleven forward speed stages and the one reverse speed stage.