Transmission for a motor vehicle

Patent metadata

Field	Value
Publication number	US-11619296-B2
Application number	US-202016953486-A
Country	US
Kind code	B2
Filing date	Nov 20, 2020
Priority date	Nov 21, 2019
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A transmission for a motor vehicle includes a housing and a gear set. An oil drainage channel is formed by the housing and/or by an element connected to the housing and is arranged spatially underneath the gear set. The oil drainage channel includes at least one gear set-side inlet port, a closed underside, and an oil sump-side outlet port at one end of the oil drainage channel, which are designed and arranged in such that oil from the gear set enters the oil drainage channel through the at least one inlet port and is guided along the closed underside to the outlet port. A suction port of a hydraulic unit of the transmission is arranged in the oil sump spatially underneath the closed underside of the oil drainage channel and axially offset with respect to the outlet port.

First claim

The invention claimed is:

1. A transmission (G) for a motor vehicle (K), comprising:
a housing (GG);
a hydraulic unit (HY);
an input shaft (GW 1 ) and an output shaft (GW 2 ); and
a gear set (RS) enclosed by the housing (GG), the gear set (RS) configured for making different transmission ratios available between the input shaft (GW 1 ) and the output shaft (GW 2 ),
wherein oil for lubrication collects in an oil sump (S) of the transmission (G) due to gravity, and the oil is feedable to the gear set (RS),
wherein an oil drainage channel (D) is formed by the housing (GG) and/or by an element (HY) connected to the housing (GG), the oil drainage channel (D) is arranged underneath the gear set (RS), and the oil drainage channel (D) comprises
at least one gear set-side inlet port (DE 1 , DE 2 , DE 3 ),
a fully closed underside (DL), and
a single oil sump-side outlet port (DA) at one end of the oil drainage channel (D),

wherein the at least inlet port (DE 1 , DE 2 , DE 3 ), the fully closed underside (DL), and the single oil sump-side outlet port (DA) are configured and arranged such that oil from the gear set (RS) enters the oil drainage channel (D) through the at least one inlet port (DE 1 , DE 2 , DE 3 ) and is guided along the fully closed underside (DL) to the outlet port (DA), and
wherein a suction port (OF) of the hydraulic unit (HY) is arranged in the oil sump (S) underneath the fully closed underside (DL) of the oil drainage channel (D) and axially offset with respect to the outlet port (DA).

2. The transmission (G) of claim 1 , wherein the at least one inlet port (DE 1 , DE 2 , DE 3 ) is arranged axially offset with respect to the outlet port (DA).

3. The transmission (G) of claim 1 , wherein the at least one inlet port (DE 1 , DE 2 , DE 3 ) is a plurality of inlet ports (DE 1 , DE 2 , DE 3 ).

4. The transmission (G) of claim 1 , wherein the outlet port (DA) is the only outlet port for the oil drainage channel (D).

5. The transmission (G) of claim 1 , wherein the closed underside of the oil drainage channel (DL) is at least partially formed by the hydraulic unit (HY), and the hydraulic unit (HY) is connected to the housing (GG).

6. The transmission (G) of claim 1 , wherein the housing (GG) comprises a housing wall (ZP), and the outlet port (DA) is arranged directly under the housing wall (ZP).

7. The transmission (G) of claim 6 , wherein the housing wall (ZP) is arranged between the gear set (RS) and a cavity (G 1 ) of the transmission (G) positioned upstream from the gear set (RS), and the cavity (G 1 ) is at least partially enclosed by the housing (GG).

8. The transmission (G) of claim 7 , further comprising an electric machine (EM) and/or a torque converter (TC) disposed within the cavity (G 1 ).

9. The transmission (G) of claim 7 , wherein the cavity (G 1 ) is configured as a wet space, and oil flowing out of the cavity (G 1 ) collects in the oil sump (S) due to gravity.

10. The transmission (G) of claim 7 , wherein an opening (ZPA) is provided in the housing wall (ZP) for pressure compensation between the gear set (RS) and the cavity (G 1 ).

11. The transmission (G) of claim 1 , wherein the transmission (G) is configured for a motor vehicle (K) that comprises a drive train aligned in parallel to a direction of travel (X) of the motor vehicle (K), and the input shaft (GW 1 ) and the output shaft (GW 2 ) are aligned in parallel to the direction of travel (X).

12. A motor vehicle (K) comprising the transmission (G) of claim 1 .

13. The transmission (G) of claim 1 , wherein an opposite end of the oil drainage channel (D) is spaced from the one end of oil drainage channel (D) with the single oil sump-side outlet port (DA), and the opposite end of the oil drainage channel (D) is closed.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Gyarmati Tamas
• Müller Thorsten
• Stroph Stephan
• Schilling Carl

Classifications

• F16H57/0409 Primary

  characterised by increasing efficiency, e.g. by reducing splash losses · CPC title

• F16H57/0434

  relating to lubrication supply, e.g. pumps; Pressure control · CPC title

• F16H57/045

  Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case · CPC title

• F16H57/0424

  Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes · CPC title

• F16H57/0452 Primary

  Oil pans · CPC title