Drive device for a motor vehicle and method for operating a drive device

Patent metadata

Field	Value
Publication number	US-10926630-B2
Application number	US-201815889557-A
Country	US
Kind code	B2
Filing date	Feb 6, 2018
Priority date	Feb 16, 2017
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

A drive device for a motor vehicle, with a first drive assembly, a second drive assembly, and an auxiliary drive having at least one auxiliary assembly. The auxiliary drive being coupled to or can be coupled to, respectively, the first drive assembly and the second drive assembly via an epicyclic gear transmission. The auxiliary drive is coupled to a first transmission element of the epicyclic gear transmission. In this case, a second transmission element of the epicyclic gear transmission is coupled by a gearshift transmission, which is shifted in a speed-dependent manner, to a secondary drive shaft, which is coupled to or can be coupled to the first drive assembly.

First claim

The invention claimed is:

1. A drive device for a motor vehicle, comprising:
a first drive assembly, a second drive assembly, and an auxiliary drive having at least one auxiliary assembly, the auxiliary drive being coupled to or can be coupled to the first drive assembly and the second drive assembly via an epicyclic gear transmission, wherein the auxiliary drive is coupled to a first transmission element of the epicyclic gear transmission,
wherein a secondary drive shaft is coupled to a second transmission element of the epicyclic gear transmission via a gearshift transmission, the gearshift transmission configured to be shifted in a speed-dependent manner,
wherein the first drive assembly is configured to provide torque generated by the first drive assembly to the second transmission element of the epicyclic gear transmission via the secondary drive shaft and the gearshift transmission,
wherein the first drive assembly is also configured to receive torque generated by the second drive assembly via a torque pathway which circumvents the epicyclic gear transmission,
wherein, through the torque pathway which circumvents the epicyclic gear transmission, the second drive assembly is connected to the first drive assembly by a first freewheel or can be coupled to the first drive assembly by a shift clutch.

2. The drive device according to claim 1 , wherein another gear set is coupled at the input side to the secondary drive shaft and at the output side to the second transmission element via a gear freewheel.

3. The drive device according to claim 1 , wherein the first transmission element is present as a planetary gear carrier, the second transmission element is present as a sun gear, and the third transmission element is present as a ring gear, wherein at least one planetary gear that is mounted rotatably at the planetary gear carrier meshes with both the sun gear and the ring gear.

4. The drive device according to claim 1 , wherein the gearshift transmission is actuated by a centrifugal governor that is coupled to the secondary drive shaft.

5. The drive device according to claim 4 , wherein the centrifugal governor couples, in a speed-dependent manner, a gear set, which is coupled to the epicyclic gear transmission at the output side, or couples one of a plurality of gear sets, which are coupled to the epicyclic gear transmission at the output side, to the secondary drive shaft.

6. The drive device according to claim 1 , wherein the second drive assembly is connected to the third transmission element via a second freewheel.

7. The drive device according to claim 6 , wherein two of the transmission elements of the epicyclic gear transmission are connected directly to each other via a third freewheel or can be fixed against each other by means of a lock-up clutch.

8. A method for operating a drive device for a motor vehicle, comprising:
equipping the drive device with a first drive assembly, a second drive assembly, and an auxiliary drive having at least one auxiliary assembly; and
coupling the auxiliary drive to the first drive assembly and the second drive assembly via an epicyclic gear transmission,
wherein the auxiliary drive is coupled to a first transmission element of the epicyclic gear transmission,
wherein a secondary drive shaft is coupled to a second transmission element of the epicyclic gear transmission via a gearshift transmission, the gearshift transmission configured to be shifted in a speed-dependent manner,
wherein the first drive assembly is configured to provide torque generated by the first drive assembly to the second transmission element of the epicyclic gear transmission via the secondary drive shaft and the gearshift transmission,
wherein the first drive assembly is also configured to receive torque generated by the second drive assembly via a torque pathway which circumvents the epicyclic gear transmission
wherein, through the torque pathway which circumvents the epicyclic gear transmission, the second drive assembly is connected to the first drive assembly by a first freewheel or can be coupled to the first drive assembly by a shift clutch.

Assignees

• Audi Ag

Inventors

• Jägle Karl
• Hoffmann Thomas
• Störmer Markus

Classifications

• B60K25/00

  Auxiliary drives (arrangement of tyre-inflating pumps mounted on vehicles B60C23/10) · CPC title

• F16H2055/178

  combined with clutch means, e.g. gear with integrated synchroniser clutch · CPC title

• B60K6/36

  characterised by the transmission gearings · CPC title

• F16D43/06

  with centrifugal masses actuating axially a movable pressure ring or the like · CPC title

• B60K17/28 Primary

  characterised by arrangement, location, or type of power take-off · CPC title