Transmission for a motor vehicle

Patent metadata

Field	Value
Publication number	US-10647191-B2
Application number	US-201716325468-A
Country	US
Kind code	B2
Filing date	Jul 24, 2017
Priority date	Aug 16, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A transmission for a motor vehicle includes a hydraulic transmission control unit, a transmission housing, an oil pan mounted onto the transmission housing, and a power electronics unit which acts as a power converter for an electric machine and is supported on the transmission housing and/or the oil pan. The hydraulic transmission control unit and the power electronics unit are at least partially arranged next to each other tangentially and/or axially relative to a transmission central axis.

First claim

The invention claimed is:

1. A transmission ( 15 ) for a motor vehicle ( 14 ), comprising:
a hydraulic transmission control unit ( 1 );
a transmission housing ( 3 );
an oil pan ( 4 ) mounted onto the transmission housing ( 3 ); and
a power electronics unit ( 2 ) configured as a power converter for an electric machine (EM), the power electronics unit ( 2 ) supported on one or both of the transmission housing ( 3 ) and the oil pan ( 4 ),
wherein the hydraulic transmission control unit ( 1 ) is at least partially arranged next to the power electronics unit ( 2 ) along one or both of a tangential direction (T) and an axial direction (A) relative to a transmission central axis (M).

2. The transmission ( 15 ) of claim 1 , wherein:
the hydraulic transmission control unit ( 1 ) and the power electronics unit ( 2 ) are arranged in a plane (E 1 ) which extends in the tangential direction (T) and in the axial direction (A);
the power electronics unit ( 2 ) is offset with respect to the hydraulic transmission control unit ( 1 ); or
the hydraulic transmission control unit ( 1 ) and the power electronics unit ( 2 ) are arranged in the plane (E 1 ) which extends in the tangential direction (T) and in the axial direction (A), and the power electronics unit ( 2 ) is offset with respect to the hydraulic transmission control unit ( 1 ).

3. The transmission ( 15 ) of claim 1 , wherein the hydraulic transmission control unit ( 1 ) is arranged in a cavity ( 7 ) of the oil pan ( 4 ).

4. The transmission ( 15 ) of claim 1 , wherein:
the power electronics unit ( 2 ) is arranged outside a cavity ( 7 ) of the oil pan ( 4 );
the power electronics unit ( 2 ) is arranged outside a cavity ( 8 ) of the transmission housing ( 3 ); or
the power electronics unit ( 2 ) is arranged outside the cavity ( 7 ) of the oil pan ( 4 ), and the power electronics unit ( 2 ) is arranged outside the cavity ( 8 ) of the transmission housing ( 3 ).

5. The transmission ( 15 ) of claim 1 , wherein a power electronics unit base ( 9 ) and an oil pan plate ( 6 ) are arranged in a further plane (E 3 ).

6. The transmission ( 15 ) of claim 1 , wherein the power electronics unit ( 2 ) is arranged in a cavity ( 7 ) of the oil pan ( 4 ).

7. The transmission ( 15 ) of claim 6 , wherein the power electronics unit base ( 9 ) and a base of the hydraulic transmission control unit ( 1 ) are arranged in a further plane (E 3 ).

8. The transmission ( 15 ) of claim 1 , wherein:
the power electronics unit ( 2 ) is positioned on the transmission housing ( 3 )
the power electronics unit ( 2 ) is positioned on an oil pan wall ( 5 ) of the oil pan ( 4 ); or
the power electronics unit ( 2 ) is positioned on the transmission housing ( 3 ) and the oil pan wall ( 5 ) of the oil pan ( 4 ).

9. The transmission ( 15 ) of claim 1 , wherein the power electronics unit ( 2 ) is L-shaped, the hydraulic transmission control unit ( 1 ) is L-shaped, or both the power electronics unit ( 2 ) and the hydraulic transmission control unit ( 1 ) are L-shaped.

10. The transmission ( 15 ) of claim 9 , wherein a crosspiece ( 12 ) of the power electronics unit ( 2 ) is elongated along the axial direction (A), and a leg ( 13 ) of the power electronics unit ( 3 ) is elongated along the tangential direction (T).

11. The transmission ( 15 ) of claim 9 , wherein a crosspiece ( 12 ) of the hydraulic transmission control unit ( 1 ) is elongated along the axial direction (A), and a leg ( 13 ) of the hydraulic transmission control unit ( 1 ) is elongated along the tangential direction (T).

12. The transmission ( 15 ) of claim 1 , wherein the power electronics unit ( 2 ) is arranged flush with the oil pan ( 4 ).

13. A hybrid drive ( 18 ) comprising the transmission ( 15 ) of claim 1 and the electric machine (EM), wherein the electric machine (EM) is electrically conductively connected to the power electronics unit ( 2 ).

14. The hybrid drive ( 18 ) of claim 13 , wherein:
the electric machine (EM) is operatively connected to a transmission shaft ( 16 );
a transmission output shaft ( 17 ) is drivable by the electric machine (EM) depending on an operating condition of the transmission ( 15 ); or
the electric machine (EM) is operatively connected to a transmission shaft ( 16 ), and the transmission output shaft ( 17 ) is drivable by the electric machine (EM) depending on the operating condition of the transmission ( 15 ).

15. A motor vehicle, comprising a motor vehicle drive unit (VM) and the transmission ( 15 ) of claim 1 , wherein the motor vehicle drive unit (VM) is operatively connected to the transmission ( 15 ).

16. A motor vehicle, comprising a motor vehicle drive unit (VM) and the hybrid drive ( 18 ) of claim 13 , wherein the motor vehicle drive unit (VM) is operatively connected to the hybrid drive ( 18 ).

Assignees

• Zahnradfabrik Friedrichshafen
• Zf Friedrichschafen Ag

Inventors

• Brehmer Martin
• Herrmann Michael

Classifications

• B60K6/40

  characterised by the assembly or relative disposition of components · CPC title

• B60K2006/4825

  Electric machine connected or connectable to gearbox input shaft · CPC title

• F16H57/0446

  the supply forming part of the transmission control unit, e.g. for automatic transmissions · CPC title

• F16H2057/02034

  Gearboxes combined or connected with electric machines · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title