Connection of an oil pump to a hybrid transmission of a motor vehicle having an electric motor arranged axially parallel to a drive shaft

Patent metadata

Field	Value
Publication number	US-11155164-B2
Application number	US-201716462021-A
Country	US
Kind code	B2
Filing date	Nov 6, 2017
Priority date	Nov 24, 2016
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

Abstract

A connection of an oil pump (1) to a hybrid transmission of a motor vehicle includes an electric machine (3) arranged axially parallel to a transmission input shaft (2). A drive of the oil pump (1) is connected in the operative connection between the transmission input shaft (2) and the electric machine (3) via an intermediate gear (5) of a spur gear drive or via a chain drive (10).

First claim

The invention claimed is:

1. A connection of an oil pump ( 1 ) to a hybrid transmission of a motor vehicle, comprising an electric machine ( 3 ) arranged axially parallel to a transmission input shaft ( 2 ), wherein a drive of the oil pump ( 1 ) is connected to an intermediate gear ( 5 ) of a spur gear drive, and the transmission input shaft ( 2 ) is operatively connected to the electric machine ( 3 ) via the intermediate gear ( 5 ) of the spur gear drive.

2. The connection of claim 1 , further comprising a gearwheel rotationally fixed to the drive of the oil pump ( 1 ), wherein the gearwheel connects the drive of the oil pump ( 1 ) to the intermediate gear ( 5 ) of the spur gear drive, and the gearwheel is a spur gear ( 4 ) or a crown gear ( 9 ).

3. The connection of claim 2 , wherein the gearwheel ( 4 , 9 ) rotationally fixed to the drive of the oil pump ( 1 ) is formed from plastic.

4. The connection of claim 1 , further comprising a planetary transmission ( 16 ) including a sun gear, a carrier, and a ring gear, the planetary transmission ( 16 ) arranged in the operative connection between the drive of the oil pump ( 1 ) and the intermediate gear ( 5 ) of the spur gear drive, wherein the drive of the oil pump ( 1 ) is connected to the carrier, the intermediate gear ( 5 ) is connected to one of the sun gear and the ring gear, and the other of the sun gear and the ring gear is connected to a second electric machine ( 17 ).

5. The connection of claim 4 , wherein the ring gear of the planetary transmission ( 16 ) comprises an internal gearing of the intermediate gear ( 5 ).

6. The connection of claim 4 , wherein the ring gear of the planetary transmission ( 16 ) comprises an internal gearing of a gearwheel ( 4 ), and an external gearing of the gearwheel ( 4 ) meshes with the intermediate gear ( 5 ).

7. The connection of claim 1 , wherein the electric machine ( 3 ) is arranged eccentric to the transmission input shaft ( 2 ).

8. A connection of an oil pump ( 1 ) to a hybrid transmission of a motor vehicle, comprising an electric machine arranged axially parallel to a transmission input shaft ( 2 ), wherein the transmission input shaft ( 2 ) is operatively connected to the electric machine ( 3 ) via a chain drive ( 10 ), and the oil pump ( 1 ) is drivable by the electric machine ( 3 ) via a further chain drive ( 11 ).

9. The connection of claim 8 , wherein a rotor of the electric machine ( 3 ) is rotationally fixed to a double sprocket ( 12 ) comprising two sprockets ( 12 , 13 ) arranged coaxially and rotationally fixedly with respect to each other, one of the two sprockets ( 12 ) is operatively connected to a first additional sprocket ( 14 ) that is rotationally fixed to the transmission input shaft ( 2 ), and the other of the two sprockets ( 13 ) is operatively connected to a second additional sprocket ( 15 ) that is operatively connected to the drive of the oil pump ( 1 ).

10. The connection of claim 8 , further comprising a planetary transmission ( 16 ) including a sun gear, a carrier, and a ring gear, the planetary transmission ( 16 ) arranged in the operative connection between the oil pump ( 1 ) and the second additional sprocket ( 15 ), wherein the drive of the oil pump ( 1 ) is connected to the carrier, the second additional sprocket ( 15 ) is connected to one of the sun gear and the ring gear, and the other of the sun gear and the ring gear is connected to a second electric machine ( 17 ).

11. The connection of claim 10 , wherein the ring gear comprises an internal gearing of the second additional sprocket ( 15 ).

12. The connection of claim 8 , wherein the electric machine is arranged eccentric to the transmission input shaft ( 2 ).

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Rosemeier Thomas
• Roske Michael
• Kuberczyk Raffael
• Pawlakowitsch Juri
• Unseld Bernd

Classifications

• B60K2006/4816

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

• B60Y2200/92

  Hybrid vehicles · CPC title

• F16H57/0441

  Arrangements of pumps · CPC title

• F16H61/0031

  using auxiliary pumps, e.g. pump driven by a different power source than the engine · CPC title

• F16H61/0025

  Supply of control fluid; Pumps therefor · CPC title