Patent ID: 9353847
Filing Date: 2016-05-31
CPC Classification: B60K,B60W,B60Y,F16H,Y02T

Claim Text:
1. A torque vectoring device for an arrangement of two half-axles of a vehicle drive axle, for use with a differential, wherein drive torque is supplied from a propulsion motor by a cardan shaft through the differential to the two half-axles, wherein the torque vectoring device is a self-sustained unit, meaning that the torque vectoring device is used with the differential and is connected to the arrangement of the two half axles and differential only on one hand to one of the half-axles, and on the other hand to either a cage of the differential or to the other half-axle, the torque vectoring device comprising a rotative torque source that is engaged via a planetary gearing with: (a) said one of the half-axles; and (b) the cage or the other half-axle, the arrangement being such that the rotative torque source does not rotate, when a first rotational speed of said one of the half-axles is the same as a second rotational speed of the cage or the other half-axle, and wherein the rotative torque source rotates to provide an input to the planetary gearing based on a rotational speed difference between: (a) said one of the half-axles and (b) the cage or the other half-axle, and a first driven shaft that is hollow and is connected to the cage of the differential and a second driven shaft that is connected to said one of the half-axles and extends through the first driven shaft, the first and second driven shafts being driven by the torque vectoring device, wherein the planetary gearing comprises a sun gear, a planet carrier, and a ring wheel, wherein a first gear train is arranged between the second driven shaft and a shaft arrangement connected to the planet carrier of the planetary gearing, the planet carrier carrying planet gears, and a second gear train is arranged between the first driven shaft and the ring wheel of the planetary gearing, a last gear of the second gear train is last in the second gear train toward the ring wheel, the last gear being rotatable on the shaft arrangement.