Combined multistage hybrid transmission and powertrain comprising same

Patent metadata

Field	Value
Publication number	US-10875518-B2
Application number	US-201916524353-A
Country	US
Kind code	B2
Filing date	Jul 29, 2019
Priority date	Mar 24, 2017
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A combined multistage hybrid transmission has a transmission housing; a transmission input shaft; a transmission output shaft; a first planetary gear set with a first sun pinion, a first ring gear, and a first carrier shaft on which at least one first planetary gear is rotatably mounted; a second planetary gear set with a second sun pinion, a second ring gear, and a second carrier shaft on which at least one second planetary gear is rotatably mounted. An electromechanical energy converter is rotationally fixed to the first sun pinion, wherein the first ring gear is rotationally fixed to the second sun pinion by an intermediate shaft. The transmission output shaft is arranged axially parallel and at a radial distance to the transmission input shaft. The drive power can be transmitted from the transmission input shaft by a first spur gear stage with a first transmission input spur gear and a first transmission output spur gear and by a second spur gear stage with a second transmission input spur gear and a second transmission output spur gear. The two transmission output spur gears are concentric to the transmission output shaft and the two transmission input spur gears are concentric to the transmission input shaft. The first transmission input spur gear is or can be rotationally fixed to the intermediate shaft, and the second transmission input spur gear is or can be rotationally fixed to the second ring gear.

First claim

What is claimed is:

1. A combined multistage hybrid transmission, comprising:
a transmission housing;
a transmission input shaft and a transmission output shaft;
at least one first planetary gear set with a first sun pinion, a first ring gear and a first carrier shaft on which at least one first planetary gear is rotatably mounted;
a second planetary gear set with a second sun pinion, a second ring gear and a second carrier shaft on which at least one second planetary gear is rotatably mounted;
a fourth coupling; and
an electromechanical energy converter which is rotationally fixed to the first sun pinion,
wherein
the first ring gear is rotationally fixed to the second sun pinion by an intermediate shaft,
the transmission output shaft is arranged axially parallel and at a radial distance to the transmission input shaft,
drive power from the transmission input shaft is transmittable by way of a first spur gear stage with a first transmission input spur gear and a first transmission output spur gear and with a second spur gear stage having a second transmission input spur gear and a second transmission output spur gear,
the first and second transmission output spur gears are concentric to the transmission output shaft and the first and second transmission input spur gears are concentric to the transmission input shaft,
the first transmission input spur gear is rotationally fixable to the intermediate shaft, and the second transmission input spur gear is rotationally fixable to the second ring gear, and
the first carrier shaft is selectively connectible in a rotationally fixed manner by the fourth coupling to the intermediate shaft.

2. The combined multistage hybrid transmission according to claim 1 , further comprising:
a first coupling, wherein
the transmission input shaft is selectively connectible in a rotationally fixed manner by the first coupling to the first carrier shaft.

3. The combined multistage hybrid transmission according to claim 1 , wherein
the first transmission output spur gear is rotationally fixed to the transmission output shaft.

4. The combined multistage hybrid transmission according to claim 3 , wherein
the first transmission input spur gear is selectively connectible in a rotationally fixed manner by a fifth coupling to the intermediate shaft.

5. The combined multistage hybrid transmission according to claim 1 , wherein
the first transmission output spur gear is selectively connectible in a rotationally fixed manner by a sixth coupling to the transmission output shaft and the first transmission input spur gear is rotationally fixed to the intermediate shaft.

6. The combined multistage hybrid transmission according to claim 5 , wherein
the second transmission output spur gear is rotationally fixed to the transmission output shaft.

7. The combined multistage hybrid transmission according to claim 6 , wherein
a single one of two selectively shiftable couplings is provided, said two couplings comprise a second coupling and a third coupling, wherein
the second carrier shaft is connectible in a rotationally fixed manner by the second coupling to the transmission input shaft and the second transmission input spur gear is connectible in a rotationally fixed manner by the third coupling to the second ring gear.

8. The combined multistage hybrid transmission according to claim 7 , wherein the second coupling is provided, and
the second transmission input spur gear is rotationally fixed to the second ring gear.

9. The combined multistage hybrid transmission according to claim 5 , wherein
the second transmission output spur gear is selectively connectible in a rotationally fixed manner by a seventh coupling to the transmission output shaft and the second transmission input spur gear is rotationally fixed to the second ring gear.

10. The combined multistage hybrid transmission according to claim 9 , wherein
at least one of the two couplings, the sixth coupling and the seventh coupling, is designed as a frictional form-fitting coupling, or both the sixth and seventh couplings are so designed.

11. The combined multistage hybrid transmission according to claim 1 , wherein the first sun pinion is connectible in a rotationally fixed manner to the transmission housing by a first selectively shiftable brake.

12. The combined multistage hybrid transmission according to claim 1 , wherein
the second carrier shaft is permanently rotationally fixed to the transmission input shaft.

13. A power train for a hybrid vehicle comprising:
a combined multistage hybrid transmission according to claim 1 ;
an internal combustion engine, which is configured to transmit power to the transmission input shaft and which is connectible to the transmission input shaft at least temporarily, and
a drive train, which is configured to transmit power from the transmission output shaft to at least one powered wheel and which is connectible to the transmission output shaft at least temporarily.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Kluge Benjamin
• Liebert Sebastian
• Ohnemus Ulrich
• Pobitzer Fritz

Classifications

• B60W10/113 Primary

  with two input flow paths, e.g. double clutch transmission selection of one of the torque flow paths by the corresponding input clutch · CPC title

• B60W10/02

  including control of driveline clutches · CPC title

• F16H2200/2043

  with five engaging means · CPC title

• B60K2006/4816

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

• Y02T10/62

  Hybrid vehicles · CPC title