Manual transmission for a hybrid drive, method for operating a hybrid drive, and hybrid drive

Patent metadata

Field	Value
Publication number	US-10967725-B2
Application number	US-201816485551-A
Country	US
Kind code	B2
Filing date	Jan 25, 2018
Priority date	Feb 14, 2017
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

A transmission for a hybrid drive having transmission input and output shafts, a further transmission input shaft and an electric machine, which drives the further transmission input shaft. A main transmission has first and second partial transmissions with a plurality of gear planes and a pair of concentric fourth shafts, and shift elements. A range group can couple the main transmission and has a planetary gearset with three transmission elements. The first element can couple either of the transmission input shafts via the shift elements. The second element is connected to the transmission output shaft and can couple a gear plane of the partial transmissions via the shift elements. The third transmission element can be fixed to the housing or blocked against the first or second transmission element.

First claim

The invention claimed is:

1. An automated manual transmission for a hybrid drive of a motor vehicle, the automated manual transmission comprising:
a transmission input shaft as a first shaft, a transmission output shaft as a second shaft, a further transmission input shaft as a third shaft;
an electric machine being drive-connected to the further transmission input shaft;
a main transmission comprising at least first and second partial transmissions, the first partial transmission having at least a first fourth shaft and at least one gear plane coupled thereto, the second partial transmission having at least one further fourth shaft and at least one gear plane coupled thereto, and the first fourth shaft and the further fourth shaft being arranged at least one of concentrically and coaxially to each other;
a plurality of shift elements being arranged in the main transmission and selective shifting of the shift elements resulting in different gear ratios at least one of between the transmission input shaft and the transmission output shaft, and between the further transmission input shaft and the transmission output shaft;
a range group being couplable to the main transmission, the range group comprising at least one planetary gearset which has a first transmission element, a second transmission element and a third transmission element;
the first transmission element being operatively connected to at least one of the transmission input shaft and the further transmission input shaft ( 3 ) by at least one of the shift elements;
the second transmission element being operatively connected to at least one of the transmission input shaft and the further transmission input shaft by at least one of the shift elements, and the second transmission element being disengageable from all of the gear planes of the first and the second partial transmissions, and the second transmission element being operatively connected to the transmission output shaft;
the third transmission element, by a shifting device, being either selectively:
retained by a first component attached to a housing, or
coupled to the second transmission element.

2. The automated manual transmission according to claim 1 , wherein the shifting device has at least one shift element which is an additional shift element of the automated manual transmission, which is shiftable into at least first and second shifting positions, in the first shifting position, the third transmission element of the planetary gearset is fixed to the first component attached to the housing and, in the second shifting position, the third transmission element of the planetary gearset is coupled to the second transmission element.

3. The automated manual transmission according to claim 1 , wherein the shifting device has at least first and second additional shift elements of the automated manual transmission, the first additional shift element is used to retain the third gear element of the planetary gearset against the first component attached to the housing and the second additional shift element is used to couple the third gear element of the planetary gearset to the second transmission element.

4. The automated manual transmission according to claim 3 , wherein the first additional shift element and the second additional shift element are combined with one another into a double shift element.

5. The automated manual transmission according to claim 1 , wherein the shifting device has a neutral position in which the third transmission element of the planetary gearset is decoupled from the first component attached to the housing and is decoupled from the first transmission element and the second transmission element.

6. The automated manual transmission according to claim 1 , wherein the main transmission has at least first and second drive constants, the first drive constant is formed by a first gear plane of the at least one gear plane of the first partial transmission and the second drive constant is formed by a second gear plane of the at least one gear plane of the second partial transmission.

7. The automated manual transmission according to claim 1 , wherein the gear planes of the at least one gear plane of the first and the second partial transmissions of the main transmission comprises a first gear plane, a second gear plane, a third gear plane, a fourth gear plane, a fifth gear plane and a sixth gear plane;
the first partial transmission comprises the first gear plane, the fifth gear plane and the sixth gear plane, and the second partial transmission comprising the second gear plane, the third gear plane and the fourth gear plane;
the first gear plane is operatively connected to the further transmission input shaft and forms a drive constant, and the second gear plane is operatively connected to the transmission input shaft and forms another drive constant;
the third gear plane, the fourth gear plane, the fifth gear plane and the sixth gear plane each have at least one fixed gear and an associated loose gear, the fixed gears of the fifth gear plane and the sixth gear plane are fixed to the first fourth shaft, and the fixed gears of the third gear plane and the fourth gear plane are fixed to the further fourth shaft.

8. The automated manual transmission according to claim 7 , wherein the plurality of shift elements of the automated manual transmission comprises first, second, third, forth, fifth, sixth and seventh shift elements, and the transmission input shaft is operatively connectable, via the first shift element, to the first gear plane and, via the second shift element, to a fifth shaft,
the fifth shaft is operatively connected to the first transmission element of the planetary gear stage, and the fifth shaft is operatively connectable, via the third shift element, to the third gear plane, and, via the fourth shift element, to the fourth gear plane, and, via the fifth shift element, to the fifth gear plane, and
the sixth gear plane is operatively connectable, via the sixth shift element, to the fifth shaft, and the sixth gear plane is disengageably connectable, via the seventh shift element, to the second transmission element of the planetary gearset.

9. The automated manual transmission according to claim 8 , wherein with respect to the transmission input shaft, first, second, third, fourth, fifth, sixth, seventh, eighth, ninth and tenth gears are selectively attainable;
the first shift element and the sixth shift element are engaged for the first gear;
the fourth shift element is engaged for the second gear;
the third shift element is engaged for the third gear;
the first shift element and the fifth shift element are engaged for the fourth gear;
the second shift element is engaged for the fifth gear;
the first shift element and the seventh shift are engaged for the sixth gear;
the fourth shift element is engaged for the seventh gear;
the third shift element is engaged for the eighth gear;
the first shift element and the fifth shift element are engaged for the ninth gear;
the second shift element is engaged for the tenth gear;
the third transmission element of the planetary gearset is fixed, via the shifting device, to the first component attached to the housing in each of the first, the second, the third, the fourth and the fifth gears; and
the third transmission element of the planetary gearset is coupled, via the shifting device, to the second transmission element of the planetary gearset in each of the seventh, the eighth, the ninth and the tenth gears.

10. The automated manual transmission according to claim 9 , wherein
either the fifth shift element or the sixth shift element is also engaged in second gear;
the fifth shift element is also engage

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Kaltenbach Johannes
• Gersten Rayk
• Renner Stefan
• Glückler Johannes
• Mittelberger Christian
• Bornträger Kai

Classifications

• B60K6/365 Primary

  with the gears having orbital motion · CPC title

• F16H2003/0933

  with coaxial countershafts · CPC title

• B60K2006/4833

  Step up or reduction gearing driving generator, e.g. to operate generator in most efficient speed range · CPC title

• B60K6/547

  the transmission being a stepped gearing · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title