Power-split continuously variable transmission device

Patent metadata

Field	Value
Publication number	US-10641373-B2
Application number	US-201816170605-A
Country	US
Kind code	B2
Filing date	Oct 25, 2018
Priority date	Oct 25, 2017
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A variator unit is fixed to a rotationally fixed component and has a secondary side rotationally fixed to an input shaft and a primary side rotationally fixed to a first element of a first planetary gear set. The input shaft is rotationally fixable via a second shift element to a second element of a second planetary gear set, which is fixable to the rotationally fixed component via a first shift element, and is rotationally fixed to a first element of a third planetary gear set. A second element of the first planetary gear set is fixed to the rotationally fixed component. A first element of the second planetary gear set is rotationally fixed to a third element of the third planetary gear set. A third element of the first planetary gear set is rotationally fixed to a third element of the second planetary gear set.

First claim

The invention claimed is:

1. A power-split continuously variable transmission device ( 100 ), comprising:
an input shaft ( 1 );
an output shaft ( 2 );
a first planetary gear set (RS 1 ) arranged between the input shaft ( 1 ) and the output shaft ( 2 );
a second planetary gear set (RS 2 ) connected to the first planetary gear set (RS 1 ) and arranged between the input shaft ( 1 ) and the output shaft ( 2 );
a third planetary gear set (RS 3 ) connected to the second planetary gear set (RS 2 ) and arranged between the input shaft ( 1 ) and the output shaft ( 2 ); and
a variator unit ( 10 ) for transmitting power in a continuously variable manner from the input shaft ( 1 ) to the first planetary gear set (RS 1 ), the variator unit ( 10 ) having a first shift element (B 1 ), a second shift element (K 1 ) and a third shift element (K 2 ), selective actuation of the first, second and third shift elements (B 1 , K 1 , K 2 ) providing different power paths between the input shaft ( 1 ) and the output shaft ( 2 ) while making a first mode (FB 1 ), a second mode (FB 2 ) and a third mode (FB 3 ) available,
wherein the variator unit ( 10 ) is fixed to a rotationally fixed component (GG), a primary side ( 11 ) of the variator unit ( 10 ) is rotationally fixed to the input shaft ( 1 ), and a secondary side ( 12 ) of the variator unit ( 10 ) is rotationally fixed to a first element (E 11 ) of the first planetary gear set (RS 1 ),
wherein the input shaft ( 1 ) is rotationally fixable to a second element (E 22 ) of the second planetary gear set (RS 2 ) via the second shift element (K 1 ), and the input shaft ( 1 ) is rotationally fixed to a first element (E 31 ) of the third planetary gear set (RS 3 ),
wherein a second element (E 12 ) of the first planetary gear set (RS 1 ) is fixed to the rotationally fixed component (GG),
wherein the second element (E 22 ) of the second planetary gear set (RS 2 ) is fixable to the rotationally fixed component (GG) via the first shift element (B 1 ),
wherein a first element (E 21 ) of the second planetary gear set (RS 2 ) is rotationally fixed to a third element (E 33 ) of the third planetary gear set (RS 3 ),
wherein a third element (E 13 ) of the first planetary gear set (RS 1 ) is rotationally fixed to a third element (E 23 ) of the second planetary gear set (RS 2 ),
wherein a second element (E 32 ) of the third planetary gear set (RS 3 ) is rotationally fixed to the output shaft ( 2 ) and is rotationally fixable to the third element (E 13 ) of the first planetary gear set (RS 1 ) and the third element of the second planetary gear set (RS 2 ) via the third shift element (K 2 ).

2. The transmission device ( 100 ) of claim 1 , wherein the first, second and third planetary gear sets (RS 1 , RS 2 , RS 3 ) are arranged axially adjacent to one another.

3. The transmission device ( 100 ) of claim 1 , wherein the second planetary gear set (RS 2 ) is arranged radially outside the third planetary gear set (RS 3 ).

4. The transmission device ( 100 ) of claim 1 , wherein:
the first mode (FB 1 ) is continuously variable power-split and implemented when the first shift element (B 1 ) is engaged,
the second mode (FB 2 ) is continuously variable variator-driven and implemented when the third shift element (K 2 ) is engaged, and
the third mode (FB 3 ) is continuously variable power-split and implemented when the second shift element (K 1 ) is engaged.

5. The transmission device ( 100 ) of claim 1 , further comprising an electric machine (EM), a rotor (R) of the electric machine (EM) connected to the input shaft ( 1 ), the output shaft ( 2 ) or another shaft ( 3 , 4 , 5 , 6 ).

6. The transmission device ( 100 ) of claim 5 , further comprising a separating clutch, the input shaft ( 1 ) being rotationally fixable to a connecting shaft via the separating clutch.

7. The transmission device ( 100 ) of claim 5 , wherein the electric machine (EM) is arranged coaxially to the input shaft ( 1 ).

8. The transmission device ( 100 ) of claim 5 , wherein the electric machine (EM) is arranged axially parallel to the input shaft ( 1 ).

9. A motor vehicle drive train comprising the transmission device ( 100 ) of claim 1 .

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Beck Stefan
• Warth Viktor
• Wechs Michael
• Sich Bernhard
• Frank Fabio
• Moraw Jens
• Niederbrucker Gerhard
• Turner Lara Ruth

Classifications

• F16H2200/0039

  the gear ratios comprising three forward speeds · CPC title

• B60K6/365

  with the gears having orbital motion · CPC title

• F16H3/66

  composed of a number of gear trains without drive passing from one train to another · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title

• F16H2037/0886

  with switching means, e.g. to change ranges · CPC title