Patent ID: 9334942
Filing Date: 2016-05-10
CPC Classification: F16H

Claim Text:
1. A drive torque distribution apparatus, comprising: a differential device that permits a rotational difference between a first drive shaft and a second drive shaft, the differential device including a differential case and a differential gear which is enclosed in the differential case, a rotation of the differential case being transmitted to one of the first drive shaft and the second drive shaft via the differential gear, the differential case being connected to a power source and being rotationally driven by the power source; and a torque distribution adjusting device that adjusts a torque distribution between the first drive shaft and the second drive shaft, wherein the torque distribution adjusting device includes a rotary electric machine that can generate a torque between a first rotor and a second rotor rotatable relative to each other, the first rotor being mechanically connected to another of the first drive shaft and the second drive shaft, and the second rotor being mechanically connected to the differential case such that the second rotor and the differential case rotate together, thereby transmitting rotation of the first and second rotors or a rotation corresponding to a rotational difference between the first rotor and the second rotor to the differential device, the first rotor and the second rotor rotate at equal rotational speeds when the first drive shaft and the second drive shaft rotate at equal rotational speeds, a torque is generated between the first rotor and the second rotor to generate a rotational difference between the first rotor and the second rotor and to consequently generate a rotational difference between the first drive shaft and the second drive shaft, the torque distribution between the first drive shaft and the second drive shaft is adjusted according to the torque generated between the first rotor and the second rotor and the first rotor and the second rotor are disposed outside the differential case.