A power transmission device, a four-wheel drive vehicle using the same, a power transmission method, and a four-wheel drive method, and a power transmission system,

摘要

A clutch motor 30 is provided on the output shaft of the prime mover 50 so as to be relatively driven or regenerated with an outer rotor 32 and an inner rotor 34 rotatable with the prime mover 50, The assist motor 40 is directly connected to the drive shaft 22B that transmits power to the rear wheel 27.29. The clutch motor 30 is capable of regenerating a part of the energy of the prime mover 50 by sliding rotation. The at least part of the regenerated energy or the energy stored in the battery 94 drives the motor 40 The torque can be output by two axes. So-called four-wheel drive becomes possible. It is also possible to regenerate by the assist motor 40 and to overdrive the clutch motor 30. [ In the configuration using the planetary gear 120 and the motors MG1 and MG2 instead of the configuration for distributing the power of the prime mover using the clutch motor, the power is distributed by the planetary gear 120, And the other one by the motor MG2 to transmit the power to perform the four-wheel drive.