Drive system for a motor vehicle

• US 10,641,375 B2
• Filed: 11/23/2016
• Issued: 05/05/2020
• Est. Priority Date: 11/24/2015
• Status: Active Grant

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Kurth, Franz
• Primary Examiner(s): Nicholson, III, Leslie A
• Application Number:
  US15/770,610
• Publication Number:
  US 20180306298A1
• Time in Patent Office: 1,259 Days
• Field of Search: 475150
• CPC Class Codes: B60K 17/00 Arrangement or mounting of transmissions in vehicles clutches per se, e.g. construction thereof, F16D; gearing per se, e.g. construction thereof, F16H
• CPC Class Codes: B60K 2023/043 Control means for varying left-right torque distribution, e.g. torque vectoring
• CPC Class Codes: B60K 23/04 for differential gearing
• CPC Class Codes: B60Y 2300/82 Torque vectoring
• CPC Class Codes: F16H 2048/106 characterised by two sun gears
• CPC Class Codes: F16H 2048/364 using electric or hydraulic motors
• CPC Class Codes: F16H 48/11 having intermeshing planet gears
• CPC Class Codes: F16H 48/36 characterised by intentionally generating speed difference between outputs

Abstract

A drive system for a motor vehicle includes a torque vectoring unit and a differential. The torque vectoring unit has an electrical machine for producing a torque. The differential has a common planet carrier, a first sun gear, a second sun gear, a first planetary gear set and a second planetary gear set. The first planetary gear set is rotatably mounted on the common planet carrier and in meshing engagement with the first sun gear. The second planetary gear set is rotatably mounted on the common planet carrier, in meshing engagement with the second sun gear and the first planetary gear set, connected to the torque vectoring unit, and arranged to redistribute the torque between the first sun gear and the second sun gear.

Claims

1. A drive system for a motor vehicle comprising:

a torque vectoring unit with an electrical machine for producing a torque and a first planet carrier; and

,

a differential comprising;

a common planet carrier;

a first sun gear;

a second sun gear fixedly coupled to the first planet carrier;

a first planetary gear set, rotatably mounted on the common planet carrier and in meshing engagement with the first sun gear;

a second planetary gear set;

rotatably mounted on the common planet carrier; and

in meshing engagement with the second sun gear and the first planetary gear set.

2. The drive system of claim 1 wherein the torque vectoring unit comprises:

a first planetary gear set rotatably mounted on the first planet carrier and radially meshed between a first ring gear and a first sun gear; and

,

a second planetary gear set, rotatably mounted on the common planet carrier and radially meshed between a second ring gear and a second sun gear.

3. The drive system of claim 2 wherein the first ring gear and the second ring gear are fixedly coupled to one another for conjoint rotation.

4. The drive system as claimed in claim 1 wherein the common planet carrier is fixedly coupled to the torque vectoring unit.

5. The drive system claim 1 further comprising:

a stepped planetary gear rotatably mounted on the common planet carrier and including a first toothing region and a second toothing region;

an input sun gear; and

,

a stationary ring gear, wherein;

the first toothing region is in meshing engagement with the input sun gear; and

,

the second toothing region is in meshing engagement with the stationary ring gear.

6. The drive system of claim 5 wherein the input sun gear is fixedly coupled to an electric drive motor.

7. The drive system of claim 1 further comprising a first output shaft and a second output shaft, wherein the first sun gear is fixedly coupled to the first output shaft and the second sun gear is fixedly coupled to the second output shaft.

8. The drive system as claimed in claim 7 wherein the first sun gear is fixed stationary on a housing and the second sun gear is fixedly coupled to the electrical machine.