Drive device for a vehicle axle of a two-track vehicle
AssigneeAudi AG
InventorsUdo Pinschmidt, Steffen Hummel, Christian Wirth
Life of this patent
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Abstract
A drive device for a vehicle axle, in particular a rear axle, of a two-track vehicle, wherein the vehicle axle includes an axle differential, which is connectable on the input side to a primary drive machine and is connectable on the output side via flanged shafts arranged on both sides to vehicle wheels of the vehicle axle, wherein an additional drive machine and a shiftable superimposed transmission are associated with the vehicle axle, which transmission is shiftable into a torque distribution gear step, in which a drive torque generated by the additional drive machine is generated, in dependence on the dimension and rotational direction of which a torque distribution on the two vehicle wheels is changeable.
Claims19
A drive device for a vehicle axle, wherein the vehicle axle comprises:
- an axle differential, which is connectable on a differential input side to a primary drive machine and is connectable on a differential output side to vehicle wheels of the vehicle axle via flanged shafts arranged on both sides of the axle differential,
- wherein an additional drive machine and a shiftable superimposed transmission are associated with the vehicle axle,
- wherein the superimposed transmission is shiftable into a torque distribution gear mode and a hybrid gear mode,
- wherein, in the torque distribution gear mode, a torque distribution of the vehicle wheels of the vehicle axle is changeable based on a magnitude and rotational direction of a drive torque generated by the additional drive machine,
- wherein, in the hybrid gear mode, torque generated by the additional drive machine is distributed uniformly among the vehicle wheels of the vehicle axle,
- wherein the superimposed transmission comprises precisely two planetary gear trains, an input planetary gear train and an output planetary gear train, which are connectable on a superimposing input side to the additional drive machine,
- wherein the input planetary gear train is designed as a Ravigneaux gear set and the output planetary gear train is designed as a simple planetary gear train gear set,
- wherein the output planetary gear train has precisely one input element, a reaction element, and an output element, of which the input element is connected to the input planetary gear train and the output element is connected to the differential input side,
- wherein the hybrid gear mode comprises a first hybrid gear step and a second hybrid gear step,
- wherein, in both the hybrid gear mode and the torque distribution gear mode, a load path is formed through the input planetary gear train and the output planetary gear train.
Dependencies are inferred from the claim text.