Hybrid drive unit and drive train for a motor vehicle

Patent metadata

Field	Value
Publication number	US-11548367-B2
Application number	US-202016999590-A
Country	US
Kind code	B2
Filing date	Aug 21, 2020
Priority date	Aug 23, 2019
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A hybrid drive unit (HY, G) for a motor vehicle includes a housing (GG), in which a torque converter (TC) and an electric machine (EM) are accommodated. The electric machine (EM) and the torque converter (TC) are arranged directly next to each other such that the electric machine (EM) is arranged at a first face end (TC 1 ) of the torque converter housing (TCG). An oil guide shell (LS) at least partially encompasses a section of the torque converter (TC). The oil guide shell (LS) has an L-shaped cross-section including a first section (LS 1 ) and a second section (LS 2 ) and is arranged in such that the first section (LS 1 ) partially encompasses a second face end (TC 2 ) of the torque converter housing (TCG) and the second section (LS 2 ) partially encompasses a circumferential surface of the torque converter housing (TCG).

First claim

The invention claimed is:

1. A hybrid drive unit (HY, G) for a motor vehicle, comprising:
a housing (GG);
a torque converter (TC) accommodated in the housing (GG);
an electric machine (EM) accommodated in the housing (GG); and
an oil guide shell (LS) partially encompassing a section of the torque converter (TC),
wherein the electric machine (EM) and the torque converter (TC) are arranged directly next to each other in a common wet space (NR) such that the electric machine (EM) is arranged at a first face end (TC 1 ) of a housing (TCG) of the torque converter (TC),
wherein a rotor (RO) of the electric machine (EM) is connected to the housing (TCG) of the torque converter (TC), and
wherein the oil guide shell (LS) has an L-shaped cross-section that comprises a first section (LS 1 ) and a second section (LS 2 ), and the oil guide shell (LS) is arranged such that the first section (LS 1 ) partially encompasses a second face end (TC 2 ) of the torque converter housing (TCG) and the second section (LS 2 ) partially encompasses a circumferential surface of the torque converter housing (TCG).

2. The hybrid drive unit (HY, G) of claim 1 , wherein the oil guide shell (LS) is arranged such the second section (LS 2 ) of the oil guide shell (LS) partially encompasses a circumferential surface of the electric machine (EM).

3. The hybrid drive unit (HY, G) of claim 2 , wherein the rotor (RO) is arranged radially within a stator (ST) of the electric machine (EM), and the circumferential surface of the electric machine (EM) that is encompassed by the oil guide shell (LS) is formed by a section of the stator (ST).

4. The hybrid drive unit (HY, G) of claim 1 , wherein the electric machine (EM) is coolable via a supply of cooling oil (KF), and the oil guide shell (LS) is configured and arranged such a portion of the cooling oil (KF) flowing off the electric machine (EM) is collected at an inner surface of the oil guide shell (LS).

5. The hybrid drive unit (HY, G) of claim 4 , wherein the oil guide shell (LS) is arranged such the second section (LS 2 ) of the oil guide shell (LS) partially encompasses a circumferential surface of the electric machine (EM), the oil guide shell (LS) encompasses only a portion of an axial extension of the electric machine (EM), and the oil guide shell (LS) is configured and arranged such that the cooling oil (KF) flowing off the electric machine (EM) is only partly collected at the inner surface of the oil guide shell (LS).

6. The hybrid drive unit (HY, G) of claim 4 , wherein the oil guide shell (LS) and the housing (GG) of the hybrid drive unit (HY, G) are configured and arranged such that the portion of the cooling oil (KF) flowing off the electric machine (EM) that is not collected at the inner surface of the oil guide shell (LS) is guided spatially underneath the oil guide shell (LS) to an oil sump (SU) of the hybrid drive unit (HY, G).

7. The hybrid drive unit (HY, G) of claim 4 , wherein a gap (C) is formed between the inner surface of the oil guide shell (LS) and the housing (TCG) of the torque converter (TC), and the oil guide shell (LS) is arranged in such that collected cooling oil (KF) is flowable into the gap (C).

8. The hybrid drive unit (HY, G) of claim 7 , further comprising means (LS-X, GG-X, LS-K) for carrying away cooling oil (KF) present in the gap (C).

9. The hybrid drive unit (HY, G) of claim 8 , wherein the at least one means comprises a scraper edge (LSX) formed at the oil guide shell (LS).

10. The hybrid drive unit (HY, G) of claim 8 , wherein the at least one means comprises a scraper edge (LSX) formed or attached at the housing (GG) of the hybrid drive unit (HY, G).

11. The hybrid drive unit (HY, G) of claim 8 , wherein the at least one means comprises a drainage duct (LSK) of the oil guide shell (LS).

12. The hybrid drive unit (HY, G) of claim 1 , wherein the oil guide shell (LS) is rotationally fixed to the housing (GG).

13. The hybrid drive unit (HY, G) of claim 1 , wherein the oil guide shell (LS) comprises a cover element (LSA) that partially covers a drive element (PX) of an oil pump (P) of the hybrid drive unit (HY, G).

14. The hybrid drive unit (HY, G) of claim 1 , wherein the oil guide shell (LS) is arranged such that an oil level in the hybrid drive unit (HY, G) is situated higher than a lowermost point of the oil guide shell (LS) in a horizontally aligned installation position of the hybrid drive unit (HY, G).

15. The hybrid drive unit (HY, G) of claim 1 , wherein the hybrid drive unit is formed by a transmission (G) or by a hybrid module (HY).

16. A drive train for a motor vehicle, comprising the hybrid drive unit (HY, G) of claim 1 .

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Gyarmati Tamas
• Debernitz Leschek
• Müller Thorsten
• Stroph Stephan
• Gutsche Alexander
• Reinders Peter
• Ratzmann Thomas

Classifications

• F16H2200/201

  with three sets of orbital gears · CPC title

• H02K9/19

  for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil · CPC title

• F16H57/0436

  Pumps · CPC title

• F16H57/0417

  Heat exchangers adapted or integrated in the gearing · CPC title

• F16H57/0457

  Splash lubrication · CPC title