Motor vehicle transmission for an at least partially electrically driven motor vehicle

Patent metadata

Field	Value
Publication number	US-11999237-B2
Application number	US-202318240535-A
Country	US
Kind code	B2
Filing date	Aug 31, 2023
Priority date	Aug 31, 2022
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A motor vehicle transmission ( 1 ) has a drive input shaft ( 15 ), a drive output shaft ( 16 ), a first planetary gearset (P 1 ), and a second planetary gearset (P 2 ). The drive input shaft ( 15 ) is provided for coupling to a drive machine. In addition, a first shifting element (A) and a second shifting element (B) are provided, at least functionally. Also disclosed is a drive unit ( 5 ), a motor vehicle drivetrain, a hybrid or electric vehicle, and a method for operating a motor vehicle transmission.

First claim

The invention claimed is:

1. A motor vehicle transmission for an at least partially electrically driven motor vehicle, the motor vehicle transmission comprising:
a first planetary gearset and a second planetary gearset each comprising a first element, a second element, and a third element, in the form respectively, of a sun gear, a planetary web, and a ring gear, wherein the third element of the first planetary gearset is connected rotationally fixed to the second element of the second planetary gearset, and wherein the third element of the second planetary gearset is immobilized;
a first shifting element or functional equivalent thereof configured in a closed state to immobilize the third element of the first planetary gearset and the second element of the second planetary gearset;
a second shifting element or functional equivalent thereof configured in a closed state to connect the first element of the second planetary gearset rotationally fixed to a drive output shaft;
a drive input shaft connected in a rotationally fixed manner to the first element of the first planetary gearset, wherein the drive input shaft is configured for coupling to an electric machine; and
the drive output shaft connected in a rotationally fixed manner to the second element of the first planetary gearset.

2. The motor vehicle transmission according to claim 1 , further comprising:
a third shifting element or functional equivalent thereof configured in a closed state to bring the first element of the second planetary gearset into a rotationally fixed connection with the drive input shaft.

3. The motor vehicle transmission according to claim 1 , further comprising:
an additional input shaft configured for coupling to a further drive machine, preferably an electric machine, and
a further shifting element or functional equivalent thereof configured in a closed state to connect the additional input shaft in a rotationally fixed manner to the first element of the second planetary gearset, or to connect the additional input shaft in a rotationally fixed manner to the third element of the first planetary gearset and the second element of the second planetary gearset, the additional shifting element further configured in the closed state, to bring the input shaft in a rotationally fixed connection with the drive input shaft.

4. The motor vehicle transmission according to claim 1 , wherein the first shifting element is configured in the closed state to directly bring about the fixed condition of the third element of the first planetary gearset and the second element of the second planetary gearset, and wherein in the closed state the first shifting element connects the third element of the first planetary gearset and the second element of the second planetary gearset to an immobilized structural element.

5. The motor vehicle transmission according to claim 1 , wherein the first shifting element, in the closed state, indirectly brings about the fixed condition of the third element of the first planetary gearset and the second element of the second planetary gearset, in that in the closed state the first shifting element connects the first element of the second planetary gearset rotationally fixed to an immobilized structural element.

6. The motor vehicle transmission according to claim 1 , wherein individual shifting elements are each in the form, at least functionally, of an interlocking shifting element.

7. The motor vehicle transmission according to claim 1 , wherein the second shifting element and the third shifting element are formed by a shifting device, the shifting device having a coupling element configured be moved to a first shift position and to a second shift position, such that in the first shift position the coupling element functionally reproduces an actuated condition of the second shifting element and connects the first element of the second planetary gearset rotationally fixed to the drive output shaft, and such that in the second shift position the coupling element functionally reproduces an actuated condition of the third shifting element and brings the first element of the second planetary gearset and the drive input shaft into rotationally fixed connection with one another.

8. The motor vehicle transmission according to claim 1 , wherein the first shifting element, the second shifting element, and the third shifting element are formed by a shifting device, whose coupling element is configured to be positioned respectively in a first shift position, a second shift position, and a third shift position, such that in the first shift position the coupling element functionally reproduces an actuated condition of the first shifting element and immobilizes the first element of the second planetary gearset, wherein in the second shift position the coupling element functionally reproduces an actuated condition of the second shifting element and connects the first element of the second planetary gearset rotationally fixed to the drive output shaft, and wherein in the third shift position the coupling element functionally reproduces an actuated condition of the third shifting element and brings the first element of the second planetary gearset into rotationally fixed connection with the drive input shaft.

9. The motor vehicle transmission according to claim 5 , wherein each of the first shifting element and the second shifting element is formed by a shifting device, having a coupling element configured to be moved to a first shift position and to a second shift position, such that in the first shift position the coupling element functionally reproduces an actuated condition of the first shifting element and connects the first element of the second planetary gearset rotationally fixed to the fixed structural element, wherein in the second shift position the coupling element functionally reproduces an actuated condition of the second shifting element and connects the first element of the second planetary gearset rotationally fixed to the drive output shaft.

10. The motor vehicle transmission according to claim 3 , wherein the further shifting element and the additional shifting element are formed by a shifting device having a coupling element configured to be moved to a first shift position and to a second shift position, such that in the first shift position the coupling element functionally reproduces an actuated condition of the further shifting element and connects the input shaft rotationally fixed either to the first element of the second planetary gearset or to the third element of the first planetary gearset and the second element of the second planetary gearset, and such that in the second shift position the coupling element functionally reproduces an actuated condition of the additional shifting element and brings the input shaft into rotationally fixed connection with the drive input shaft.

11. The motor vehicle transmission according to claim 1 , wherein the planetary gearsets are arranged axially at a connection point configured to couple the drive input shaft to the drive machine, axially in a sequence of the second planetary gearset followed by the first planetary gearset.

12. The motor vehicle transmission according to claim 5 , further comprising a further connection point configured to couple the input shaft to the further drive machine, the further connection point between the connection point and the second planetary gearset.

13. The motor vehicle transmission according to claim 1 , wherein the drive output shaft is coupled to a differential gearset.

14. A drive unit for an at least partially electrically driven motor vehicle, comprising:
an electric ma

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Kaltenbach Johannes
• Martin Thomas
• Radic Mladjan
• Bornträger Kai
• Glückler Johannes
• Renner Stefan

Classifications

• B60K1/00

  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

• B60K17/04 Primary

  characterised by arrangement, location or kind of gearing · CPC title

• B60L15/2045

  for optimising the use of energy · CPC title

• B60L15/2054

  by controlling transmissions or clutches · CPC title