Drive unit for a motor vehicle, motor vehicle, and method for operating a motor vehicle
AssigneeAudi AG
InventorsUdo Pinschmidt, Stefanie Seide
Life of this patent
Estimating the term…
Abstract
Drive device for a motor vehicle, includes a differential for distributing a torque that can be supplied via a drive shaft to two output shafts and a superimposition gear coupled with the differential one of the output shafts and an additional motor for superimposing torques supplied from the output shaft, from the differential and from the additional motor, wherein the differential is coupled via a torque reducing transmission ratio device with the superimposition gear, wherein the superimposition gear includes a switching device that can be controlled with a control device, wherein the superimposition gear superimposes in a first switching mode torques supplied to the switching device from the output shaft.
Claims13
A drive unit for a motor vehicle, comprising:
- a differential for distributing a drive torque that can be supplied via a drive shaft to two output shafts, and
- a superimposition gear coupled to the differential, one of the output shafts and an auxiliary motor for superimposing torque supplied from the output shaft, from the differential and from the auxiliary motor,
- wherein the differential is coupled via a torque reducing transmission ratio device to the superimposition gear,
- wherein the superimposition gear further comprises a switching device that can be controlled by a control device,
- wherein the superimposition gear superimposes in a first switching state of the switching device the torques supplied from the output shaft, from the differential and from the auxiliary motor in such a manner that the distribution of the torque to the output shafts depends on the additional torque generated by the auxiliary motor, and
- in a second switching state of the switching device the torques supplied from the output shaft, from the differential and from the auxiliary motor in such a manner that the additional torque is distributed uniformly to both output shafts.
A method for operating a motor vehicle with a drive motor, comprising:
- a drive device for driving the wheels of at least one axle of the motor vehicle, wherein the drive device is coupled with a differential, by means of which a drive torque supplied via a drive shaft from the drive motor is distributed to two output shafts, and
- a superimposition gear coupled with the differential, an output axle and an auxiliary motor, by means of which the torques supplied from the output axle, the differential and the auxiliary motor are superimposed,
- wherein the differential is coupled via a torque reducing transmission ratio device with the superimposition gear, wherein it comprises a switching device, which is controlled by a control device,
- wherein torques supplied to the superimposition gear in a first switching state of the switching device from the output axle, the differential and the auxiliary motor are superimposed by the superimposition gear in such a way that the distribution of the drive torque to the output shafts depends on an additional torque generated by the auxiliary motor, and in a second switching state of the switching device, the torques supplied from the output axle, the differential and the auxiliary motor are superimposed by the superimposition gear in such a way that the additional torque is distributed uniformly to both output shafts.
Dependencies are inferred from the claim text.