Vibration reduction apparatus of hybrid vehicle

A vibration reduction apparatus of a hybrid vehicle, comprising:

• a prime mover;
• a first shift mechanism including a first rotating shaft and a plurality of gears contained in a first gear group, and configured to output a rotation of the first rotating shaft to a third rotating shaft through any of the plurality of gears contained in the first gear group to shift a gear ratio;
• a second shift mechanism including a second rotating shaft and a plurality of gears contained in a second gear group, and configured to output a rotation of the second rotating shaft to the third rotating shaft through any of the plurality of gears contained in the second gear group to shift the gear ratio;
• a first clutch configured to connect or disconnect an output shaft of the prime mover and the first rotating shaft to transmit or non-transmit a torque of the prime mover to the first rotating shaft;
• a second clutch configured to connect or disconnect the output shaft of the prime mover and the second rotating shaft to transmit or non-transmit the torque of the prime mover to the second rotating shaft;
• an electric motor connected to the first rotating shaft, the electric motor being capable of generating electricity;
• a driving part configured to drive the first shift mechanism, the second shift mechanism, the first clutch and the second clutch;
• a controller configured to control the driving part and the electric motor so that, in a first mode, the torque of the prime mover is output to the electric motor through the first rotating shaft and is output to the third rotating shaft through the second shift mechanism, and in a second mode, the torque of the prime mover is output to the third rotating shaft through the second shift mechanism and a torque of the electric motor is output to the third rotating shaft through the first shift mechanism;
• and
• a differential rotation detector configured to detect a difference between a rotational speed of the output shaft of the prime mover and a rotational speed of the second rotating shaft,
• wherein the controller controls the driving part and the electric motor so as to switch an operation mode from the first mode to the second mode, when the difference detected by the differential rotation detector in the first mode is within a predetermined range continuously for a predetermined time.