Hybrid transmission for a vehicle

Patent metadata

Field	Value
Publication number	US-11926220-B2
Application number	US-202318203833-A
Country	US
Kind code	B2
Filing date	May 31, 2023
Priority date	Nov 30, 2020
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

A hybrid transmission for a vehicle includes a transmission input shaft extending in a transverse direction, at least one countershaft arranged parallel to the transmission input shaft, a clutch device arranged coaxially with respect to the transmission input shaft and which has at least one clutch, and a differential having a differential input gear. A rotational axis of the differential input gear is arranged parallel to the transmission input shaft. The transmission also includes an electric machine having a rotor with a rotor rotational axis arranged parallel to the transmission input shaft and a transmission control device. As viewed in a longitudinal direction perpendicular to the transverse direction, the differential input gear, the transmission input shaft, and a transmission controller including the transmission control device are arranged in succession in the sequence specified.

First claim

What is claimed is:

1. A hybrid transmission for a vehicle, the hybrid transmission comprising:
a transmission input shaft extending in a transverse direction;
at least one countershaft arranged parallel to the transmission input shaft;
a clutch device arranged coaxially with the transmission input shaft and having at least one clutch;
a differential having a differential input gear, wherein a rotational axis of the differential input gear is arranged parallel to the transmission input shaft;
an electric machine having a rotor and a stator, wherein a rotor rotational axis is arranged parallel to the transmission input shaft; and
a transmission control device,
wherein, as viewed in a longitudinal direction arranged perpendicular to the transverse direction, the differential input gear, the transmission input shaft, and a transmission controller comprising the transmission control device are arranged in succession in the recited sequence,
wherein at least one part of a power electronics system for the electric machine is arranged adjacent to the transmission control device in a vertical direction, which is arranged perpendicular to the transverse direction and perpendicular to the longitudinal direction, and
wherein the electric machine is arranged adjacent to and above a hydraulic transmission controller in the vertical direction and overlapping the hydraulic transmission controller in the longitudinal direction, and
wherein the hybrid transmission further comprises a direct current connection for the power electronics system arranged in the vertical direction above the rotor rotational axis and in the longitudinal direction between the rotational axis of the differential input gear and the rotor rotational axis.

2. The hybrid transmission of claim 1 , wherein the at least one part of the power electronics system arranged adjacently to the transmission control device is arranged above the transmission control device in operation.

3. The hybrid transmission of claim 1 , wherein a further part of the power electronics system extends in the longitudinal direction and is arranged above the electric machine in the vertical direction.

4. The hybrid transmission of claim 1 , wherein the power electronics system is arranged at least partially overlapping the transmission control device in the longitudinal direction or in the transverse direction.

5. The hybrid transmission of claim 1 , further comprising:
a circuit board of an inverter of the power electronics system arranged adjacently in the vertical direction and parallel in the longitudinal direction to a circuit board of the transmission control device.

6. The hybrid transmission of claim 5 , wherein the circuit board of the inverter of the power electronics system is spaced less than 20 mm from, and arranged in the vertical direction flush with, the circuit board of the transmission control device.

7. The hybrid transmission of claim 1 , wherein the rotor rotational axis of the electric machine is arranged in the longitudinal direction between the transmission input shaft and the at least one part of the power electronics system.

8. The hybrid transmission of claim 7 , further comprising:
an alternating current connection, connecting the electric machine and the power electronics system, arranged in the vertical direction below the rotor rotational axis.

9. The hybrid transmission of claim 1 , wherein the electric machine is arranged in the longitudinal direction adjacent to the at least one part of the power electronics system.

10. The hybrid transmission of claim 1 , further comprising:
a transmission housing accommodating at least the differential input gear, the transmission input shaft, the at least one countershaft, the electric machine, the transmission control device, the hydraulic transmission controller and the power electronics system, wherein the transmission housing comprises a housing cover arranged in the longitudinal direction on a side, facing away from the transmission input shaft, of the transmission control device and of the at least one part of the power electronics system.

11. The hybrid transmission of claim 1 , wherein the transverse direction, the longitudinal direction, and the vertical direction, in a case of the hybrid transmission installed in the vehicle, correspond in the specified sequence to a vehicle transverse direction, a vehicle longitudinal direction, and a vehicle vertical direction.

12. The hybrid transmission of claim 1 , wherein the clutch device has a dual clutch or a disconnect clutch.

Assignees

• Mercedes Benz Group Ag

Inventors

• Dengler Martin
• Bauer Benjamin
• Becker Jan
• Brandenburg Markus
• Ertel Andreas
• Hahn Peter
• Haerter Tobias
• Mueller Elmar
• Weigold Jörg
• Maurer Timo
• Birje Preetam

Classifications

• B60L15/007 Primary

  Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles · CPC title

• B60K1/00 Primary

  Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) · CPC title

• B60K17/08

  of mechanical type · CPC title

• F16H37/0813

  with only one input shaft · CPC title

• F16H57/037

  Gearboxes for accommodating differential gearings (rotating cases for differential gearings F16H48/40) · CPC title