Hybrid drive system for a motor vehicle, in particular for a car

Patent metadata

Field	Value
Publication number	US-2025100368-A1
Application number	US-202318729222-A
Country	US
Kind code	A1
Filing date	Jan 13, 2023
Priority date	Jan 17, 2022
Publication date	Mar 27, 2025
Grant date	—

Abstract

A hybrid drive system for a motor vehicle includes an internal combustion engine having a crankshaft, an electric motor having a rotor, and a gearbox having a cylindrical gear unit with an input shaft coupled or coupleable to the crankshaft for conjoint rotation and an output shaft arranged parallel to the input shaft. The gearbox includes a planetary gear with a first element, a second element, and a third element. The system also includes a differential gearing. The rotor of the electric motor is coupled to the input shaft in such a way that torques provided by the electric motor via the rotor can be introduced into the gearbox via the input shaft. The input shaft is connected to the first element for conjoint rotation. The second element is connected to a first fixed gear for conjoint rotation.

First claim

1 - 10 . (canceled)

11 . A hybrid drive system for a motor vehicle, the hybrid drive system comprising:
an internal combustion engine having a crankshaft; an electric motor having a rotor; a gearbox comprising a cylindrical gear unit with an input shaft coupled or couplable to the crankshaft to conjointly rotate and an output shaft arranged parallel to the input shaft, and a planetary gear with a first element, a second element, and a third element; and a differential gearing, wherein the input shaft is connected to the first element to conjointly rotate, wherein the second element is connected to a first fixed gear to conjointly rotate, the first fixed gear meshes permanently with a first speed gear arranged coaxially to the output shaft, the rotor of the electric motor is coupled to the input shaft in such a way that torques provided by the electric motor via the rotor are introducible into the gearbox via the input shaft while bypassing the second element and the third element of the planetary gear, wherein the hybrid drive system further comprises a second shift element configured to connect the crankshaft to the third element of the planetary gear to conjointly rotate.

12 . The hybrid drive system of claim 11 , further comprising:
an output wheel, which is connected to the output shaft to conjointly rotate and which meshes permanently with a differential input gear of the differential gearing.

13 . The hybrid drive system of claim 11 , further comprising:
a first shift element configured to connect the crankshaft to the input shaft to conjointly rotate.

14 . The hybrid drive system of claim 13 , wherein the first shift element is arranged axially overlapping with the differential gearing.

15 . The hybrid drive system of claim 11 , further comprising:
a third shift element configured to connect the third element to a housing of the hybrid drive system to conjointly rotate.

16 . The hybrid drive system of claim 15 , wherein the second shift element and the third shift element are combined as a coupling shift element with a single actuator.

17 . The hybrid drive system of claim 11 , further comprising:
a second fixed gear, which is connected to the input shaft to conjointly rotate and which meshes permanently with a second speed gear arranged coaxially to the output shaft.

18 . The hybrid drive system of claim 17 , further comprising:
a third fixed gear, which is connected to the input shaft to conjointly rotate and to which the rotor is coupled in such a way that torques provided by the electric motor via the rotor are introducible into the gearbox via the third fixed gear.

19 . The hybrid drive system of claim 18 , wherein viewed in an axial direction of the crankshaft, the first shift element, the third fixed gear, the second fixed gear, the first fixed gear and the planetary gear are arranged in a following sequence one after the other: the first shift element, the third fixed gear, the second fixed gear, the first fixed gear, and the planetary gear.

Assignees

• Mercedes Benz Group Ag

Inventors

• Schilder Tobias

Classifications

• B60K2006/4825

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

• B60K6/547

  the transmission being a stepped gearing · CPC title

• B60K6/48

  Parallel type · CPC title

• B60K6/387 Primary

  Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title