Hybrid transmission device and motor vehicle comprising a hybrid transmission device

Patent metadata

Field	Value
Publication number	US-12344098-B2
Application number	US-202118559144-A
Country	US
Kind code	B2
Filing date	Nov 30, 2021
Priority date	May 6, 2021
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A hybrid transmission device ( 1 ) includes a first transmission input shaft ( 2 ), a second transmission input shaft ( 4 ), a superposition gear unit ( 6 ) arranged axially parallel to the first transmission input shaft ( 2 ) and to the second transmission input shaft ( 4 ) and configured for connecting an electric machine ( 5 ). The superposition gear unit ( 6 ) includes a first planetary gear set (P 1 ) with a sun gear (P 11 ), a ring gear (P 12 ), and a planet carrier (P 13 ) with planet gears (P 14 ) rotatably arranged thereon. A gear reduction stage ( 7 ) includes a first spur gear pair (ST 1 ) and a second spur gear pair (ST 2 ) for connecting the superposition gear unit ( 6 ) to a differential ( 8 ). At least a first shift element (A), a second shift element (B), and a third shift element (C) are configured for implementing an electrodynamic driving-off process and a purely electric or hybridized drive of the motor vehicle.

First claim

The invention claimed is:

1. A hybrid transmission device ( 1 ) for a motor vehicle ( 100 ), comprising:
a first transmission input shaft ( 2 ) for connecting an internal combustion engine ( 3 );
a second transmission input shaft ( 4 ) for connecting a rotor of a first electric machine ( 5 );
a superposition gear unit ( 6 ) arranged axially parallel to the first transmission input shaft ( 2 ) and to the second transmission input shaft ( 4 ), the superposition gear unit ( 6 ) configured for connecting the first electric machine ( 5 ), the superposition gear unit ( 6 ) comprising a first planetary gear set (P 1 ) with a sun gear (P 11 ), a ring gear (P 12 ), and a planet carrier (P 13 ) with planet gears (P 14 ) rotatably arranged thereon;
a gear reduction stage ( 7 ) comprising a first spur gear pair (ST 1 ) and a second spur gear pair (ST 2 ) for connecting the superposition gear unit ( 6 ) to a differential ( 8 ), wherein the differential ( 8 ) comprises a first axle shaft ( 9 a ) and a second axle shaft ( 9 b ), each of the first and second axle shafts ( 9 a , 9 b ) configured for connecting a wheel of the motor vehicle, wherein the second axle shaft ( 9 b ) extends axially at least through the superposition gear unit ( 6 );
a plurality of shift elements comprising a first shift element (A), a second shift element (B), and a third shift element (C) configured for implementing an electrodynamic driving-off process and a purely electric or hybridized drive of the motor vehicle, the first shift element (A), in the engaged condition, drivingly connecting the ring gear (P 12 ) or the sun gear (P 11 ) of the first planetary gear set (P 1 ) of the superposition gear unit ( 6 ) to the internal combustion engine ( 3 ); and
a multi-speed transmission ( 14 ) operatively connected on an input side to the first transmission input shaft ( 2 ) and on an output side to a countershaft ( 13 ) of the gear reduction stage ( 7 ).

2. The hybrid transmission device ( 1 ) of claim 1 , wherein the first transmission input shaft ( 2 ) is operatively connected to the first shift element (A) at least via a first traction mechanism ( 36 ) or via at least a first intermediate gear.

3. The hybrid transmission device ( 1 ) of claim 1 , wherein the second transmission input shaft ( 4 ) is operatively connected at least via a second traction mechanism ( 37 ) and/or via at least a first intermediate gear to the sun gear (P 11 ) or to the ring gear (P 12 ) of the first planetary gear set (P 1 ) of the superposition gear unit ( 6 ).

4. The hybrid transmission device ( 1 ) of claim 1 , wherein the planet carrier (P 13 ) of the superposition gear unit ( 6 ) is operatively connected to the second spur gear pair (ST 2 ) of the gear reduction stage ( 7 ).

5. The hybrid transmission device ( 1 ) of claim 1 , wherein two of the first, second, and third shift elements (A, B, C) are formed as a double shift unit (DS).

6. The hybrid transmission device ( 1 ) of claim 1 , wherein at least two of the first, second, and third shift elements (A, B, C) are arranged axially between a point of connection of the first transmission input shaft ( 2 ) and the first planetary gear set (P 1 ) of the superposition gear unit ( 6 ).

7. The hybrid transmission device ( 1 ) of claim 1 , wherein a point of connection of the first transmission input shaft ( 2 ) is arranged axially between at least two of the first, second, and third shift elements (A, B, C) and the first planetary gear set (P 1 ) of the superposition gear unit ( 6 ).

8. The hybrid transmission device ( 1 ) of claim 1 , further comprising a third transmission input shaft ( 10 ) for connecting a rotor of a second electric machine ( 11 ), wherein the third transmission input shaft ( 10 ) is operatively connected or operatively connectable to the first transmission input shaft ( 2 ).

9. A motor vehicle ( 100 ), comprising the internal combustion engine ( 3 ) and the hybrid transmission device ( 1 ) of claim 1 , wherein the internal combustion engine ( 3 ) is arranged axially parallel to the first electric machine ( 5 ) of the hybrid transmission device ( 1 ).

10. A hybrid transmission device ( 1 ) for a motor vehicle ( 100 ), comprising:
a first transmission input shaft ( 2 ) for connecting an internal combustion engine ( 3 );
a second transmission input shaft ( 4 ) for connecting a rotor of a first electric machine ( 5 );
a superposition gear unit ( 6 ) arranged axially parallel to the first transmission input shaft ( 2 ) and to the second transmission input shaft ( 4 ), the superposition gear unit ( 6 ) configured for connecting the first electric machine ( 5 ), the superposition gear unit ( 6 ) comprising a first planetary gear set (P 1 ) with a sun gear (P 11 ), a ring gear (P 12 ), and a planet carrier (P 13 ) with planet gears (P 14 ) rotatably arranged thereon;
a gear reduction stage ( 7 ) comprising a first spur gear pair (ST 1 ) and a second spur gear pair (ST 2 ) for connecting the superposition gear unit ( 6 ) to a differential ( 8 ), wherein the differential ( 8 ) comprises a first axle shaft ( 9 a ) and a second axle shaft ( 9 b ), each of the first and second axle shafts ( 9 a , 9 b ) configured for connecting a wheel of the motor vehicle, wherein the second axle shaft ( 9 b ) extends axially at least through the superposition gear unit ( 6 );
a plurality of shift elements comprising a first shift element (A), a second shift element (B), and a third shift element (C) configured for implementing an electrodynamic driving-off process and a purely electric or hybridized drive of the motor vehicle, the second shift element (B), in the engaged condition, connecting the ring gear (P 12 ) of the first planetary gear set (P 1 ) of the superposition gear unit ( 6 ) or the sun gear (P 11 ) of the first planetary gear set (P 1 ) of the superposition gear unit ( 6 ) to a housing (G); and
a multi-speed transmission ( 14 ) operatively connected on an input side to the first transmission input shaft ( 2 ) and on an output side to a countershaft ( 13 ) of the gear reduction stage ( 7 ).

11. A motor vehicle ( 100 ), comprising the internal combustion engine ( 3 ) and the hybrid transmission device ( 1 ) of claim 10 , wherein the internal combustion engine ( 3 ) is arranged axially parallel to the first electric machine ( 5 ) of the hybrid transmission device ( 1 ).

12. A hybrid transmission device ( 1 ) for a motor vehicle ( 100 ), comprising:
a first transmission input shaft ( 2 ) for connecting an internal combustion engine ( 3 );
a second transmission input shaft ( 4 ) for connecting a rotor of a first electric machine ( 5 );
a superposition gear unit ( 6 ) arranged axially parallel to the first transmission input shaft ( 2 ) and to the second transmission input shaft ( 4 ), the superposition gear unit ( 6 ) configured for connecting the first electric machine ( 5 ), the superposition gear unit ( 6 ) comprising a first planetary gear set (P 1 ) with a sun gear (P 11 ), a ring gear (P 12 ), and a planet carrier (P 13 ) with planet gears (P 14 ) rotatably arranged thereon;
a gear reduction stage ( 7 ) comprising a first spur gear pair (ST 1 ) and a second spur gear pair (ST 2 ) for connecting the superposition gear unit ( 6 ) to a differential ( 8 ), wherein the differential ( 8 ) comprises a first axle shaft ( 9 a ) and a second axle shaft ( 9 b ), each of the first and second axle shafts ( 9 a , 9 b ) configured for connecting a wheel of the motor vehicle, wherein the second axle shaft ( 9 b ) extends axially at least through the superposition gear unit ( 6 ); and
a plurality of shift elements comprising a first shift element (A), a second shif

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Beck Stefan
• Kaltenbach Johannes
• Wechs Michael
• Kutter Fabian
• Martin Thomas
• Brehmer Martin
• Bachmann Max
• Ziemer Peter
• Michel Christian
• Horn Matthias
• Radic Mladjan
• Pfannkuchen Ingo

Classifications

• F16H2200/2043

  with five engaging means · CPC title

• F16H2200/2005

  with one sets of orbital gears · CPC title

• F16H37/0806

  with a plurality of driving or driven shafts · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title

• B60K6/442

  Series-parallel switching type · CPC title