Power transmission apparatus for hybrid electric vehicle

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

• a motor/generator having a rotor selectively connectable to an engine output shaft;
• a first input shaft mounted coaxial with the engine output shaft and selectively connectable to the rotor;
• a second input shaft formed as a hollow shaft, mounted coaxial with and external to the first input shaft, and fixedly connected to the rotor;
• an intermediate shaft mounted in parallel with the first input shaft;
• a first output shaft mounted in parallel with the first input shaft, receiving torques from the first and second input shafts, and outputting a shifted torque based on the received torques;
• a second output shaft mounted in parallel with the first input shaft, receiving torques from the first input shaft, and outputting a shifted torque based on the received torques;
• a planetary gear set mounted on the first output shaft, having a first rotation element fixedly connected to the first output shaft, selectively receiving torques from the first and second input shafts and the intermediate shaft, and outputting a shifted torque based on the received torques to the first output shaft;
• and
• a plurality of gear sets, each of which allows at least one torque flow between the first and second input shafts, the intermediate shaft, and the first output shaft and the second output shaft.