Zf Friedrichshafen Ag

Zf Friedrichshafen

Christian Sibla

Stefan Beck

Wolfgang Rieger

Peter Ziemer

Josef Haupt

Gerhard Gumpoltsberger

Gert Bauknecht

Martin Brehmer

Michael Wechs

Raffael Kuberczyk

Eckehard Münch

Andreas Beisswenger

Christoph Margraf

Matthias Reisch

Uwe Griesmeier

Johannes Kaltenbach

Juergen Wafzig

Thilo Schmidt

Viktor Warth

Markus Herrmann

Stephan Scharr

Stefan Brom

Bernd Vahlensieck

Maik Wiesner

Ulrich Doerr

A friction element () for a frictional shift element for a transmission of a vehicle, the friction element having an annular base body with a plurality of friction surface elements (), the plurality of friction surface elements () protruding radially inwardly or radially outwardly and are distributed over a periphery of the annular base body. The friction element () and the plurality of friction surface elements () are each formed as one piece.

Friction element for a frictional shifting element for a vehicle transmission

A frictional shift element for a transmission of a vehicle, including a first friction element and a second friction element, wherein one friction element of the first and second friction elements has an approximately annular friction surface, and the other friction element of the first and second friction elements has an approximately annular base body and a plurality of friction surface elements distributed over a periphery of the approximately annular base body. The friction surface and the plurality of friction surface elements are brought into contact with each other in an overlap area for transmitting torque, wherein the friction surface elements protrude radially into the overlap area. The one friction element with the friction surface, the other friction element, and the friction surface elements are each formed as one piece. The one friction element and the approximately annular base body of the other friction element are spaced radially apart.

Frictional shifting element for a vehicle transmission

A system for locking and releasing a shifting position of a shifting element that is hydraulically actuatable by an actuating pressure is provided. The shifting element is arranged coaxially with a transmission shaft. The system includes a stop valve. The stop valve is subjectable to a control pressure that is separate from the actuating pressure of the shifting element. The stop valve is arranged radially inside the shifting element in the transmission housing.

Assembly for blocking and enabling a shifting position of a shifting element

A multi speed transmission in planetary design for a vehicle, the transmission having a housing, a first shaft () as a drive (AN), a second shaft () as an output (Ab) axially parallel to the drive, three planetary gear sets (RS, RS, RS), additional shafts (-), and six shifting elements (K, K, K, K, K, B) actuatable to realize several gear ratios. The transmission further includes machine elements (ST, ST) that transfer torque between the drive (AN) and the output (Ab). The first shaft () is connected to the planetary gear carrier (PT) of the first planetary gear set (RS) and is connectable at least to the sun gear (SR) of the second planetary gear set (RS) and to the ring gear (HR) of the third planetary gear set (RS). Additionally, the second shaft () is connected to the first machine element (ST) and to the second machine element (ST).

Multi-stage planetary transmission

An automatic transmission includes a housing, a plurality of rotatable shafts, a plurality of planetary gear sets and a plurality of shift elements. A second element of a fourth planetary gear set forms a drive shaft, and a second element of a third planetary gear set forms an output shaft. A first element of the fourth planetary gear set forms a third shaft, and a fifth shaft is constantly connected to at least two shift elements of the plurality of shift elements. A third element of the third planetary gear set forms a sixth shaft, and a seventh shaft constantly connects a first element of a second planetary gear set to a third element of the fourth planetary gear set. A second element of the second planetary gear set forms an eighth shaft.

Multistep automatic transmission

A transmission includes a main gear set, an auxiliary gear set and an electric motor with a rotor and a stator. A third shaft of the main gear set is connected to the transmission output shaft, and a first shaft of the auxiliary gear set is connected to the rotor. A second shaft of the auxiliary gear set is constantly connected to a first shaft of the main gear set. A third shaft of the auxiliary gear set is constantly connected to a second shaft of the main gear set, the third shaft of the main gear set or a fourth shaft of the main gear set.

Transmission, hybrid drive train, and drive train for an electric vehicle

An automatic transmission has a first clutch shaft that constantly connects first and fourth planetary gear sets, a second clutch shaft that constantly connects second and third planetary gear sets, and a third clutch shaft that constantly connects the third and first planetary gear sets. A drive shaft is constantly connected to the fourth planetary gear set; an output shaft is constantly connected to the third planetary gear set. The first planetary gear set is directly connected to two shift elements, the second planetary gear set is directly connected to four shift elements, the third planetary gear set is directly connected to two shift elements, the fourth planetary gear set is directly connected to four shift elements. The drive shaft is directly connected to only one shift element. The output shaft is directly connected to only one shift element. A seventh shift element is directly connected to the drive shaft and the second and fourth planetary gear sets.

Multi-speed automatic transmission

A transmission includes a main gear set, an auxiliary gear set and an electric motor with a rotor and a stator. A third shaft of the main gear set is connected to a transmission output shaft, and a first shaft of the auxiliary gear set is connected to the rotor. When a second shaft of the auxiliary gear set is connected to a first shaft of the main gear set, a third shaft of the auxiliary gear set is constantly connected to the third shaft of the main gear set or a fourth shaft of the main gear set. When the second shaft of the auxiliary gear set is connected to the third shaft of the main gear set, the third shaft of the auxiliary gear set is constantly connected to the fourth shaft of the main gear set.

Transmission, hybrid drivetrain and drivetrain for an electric vehicle

A hydraulic control device for controlling multiple torque-transferring shift elements of an automatic transmission, where each of the shift elements features at least one hydraulic actuator, which includes one actuating pressure chamber, at least one stop valve and at least one hydraulic shift device with multiple pressure adjusting devices connected to the different shift elements. Thereby, the stop valve is configured and arranged in such a manner that the actuators of at least two shift elements are hydraulically connectable to the pressure adjusting devices through a common stop valve. In a first shifting position, all actuating pressure chambers of the at least two shift elements are tightly sealed by the stop valve. In a second shifting position, all actuating pressure chambers of the at least two shift elements are connected through the stop valve to the pressure adjusting device allocated to the respective shift element.

Hydraulic control device for an automatic transmission

A vehicle transmission having a housing and a main transmission which includes input and output shafts and four planetary gearsets. Each of the gearsets has sun and ring gears, a carrier which supports a planetary gearwheel. The sun gear and the carrier of the second gearset are coupled permanently to the input and output shafts, respectively. The carrier of the second gearset is permanently coupled to the carrier of the fourth gearset. The ring gear of the second gearset is permanently coupled to the ring gear of the third gearset. The carrier of the fourth gearset can be coupled, via a first shifting element, to the sun gear of the second gearset. The carrier of the third gearset can be coupled, via a second shifting element, to the housing. The sun gear of the third gearset can be coupled, via third and fourth shifting elements, to the input shaft.

Motor vehicle transmission

A transmission includes a main gear set, an auxiliary gear set and an electric motor with a rotor and a stator. A third shaft of the main gear set is connected to a transmission output shaft. A second shaft of the auxiliary gear set is connectable through a first auxiliary shift element to a first shaft of the main gear set and through a second auxiliary shift element to the third shaft of the main gear set or to a fourth shaft of the main gear set. A third shaft of the auxiliary gear set is constantly connected to a second shaft of the main gear set. A first shaft of the auxiliary gear set is constantly connected to the rotor.

A multi-speed transmission in planetary design for a vehicle having a transmission housing (); a first shaft (), the first shaft () being a drive (An); a second shaft (), the second shaft () being an output (Ab); at least five planetary gear sets (RS, RS, RS, RS, RS); at least seven additional shafts (); and five shift elements (SE, SE, SE, SE, SE). Through actuation of the shift elements, at least nine forward gears (G, G, G, G, G, G, G, G, G) and at least one reverse gear (R) are realized. For the realization of each gear, two of the shift elements are open and at least three of the shift elements (SE, SE, SE, SE, SE) are closed.

Multi-speed transmission in planetary design for a vehicle

A transmission includes a main gear set, an auxiliary gear set and an electric motor with a rotor and a stator. A third shaft of the main gear set is connected to the transmission output shaft, and a first shaft of the auxiliary gear set is connected to the rotor. When a second shaft of the main gear set is constantly connected to a second shaft of the auxiliary gear set, the third shaft of the main gear set or a fourth shaft of the main gear set is constantly connected to the third shaft of the auxiliary gear set. When the third shaft of the main gear set is constantly connected to the second shaft of the auxiliary gear set, the fourth shaft of the main gear set is constantly connected to the third shaft of the auxiliary gear set.

A planetary multi-speed transmission for a vehicle with a housing is proposed. A first shaft is provided as a drive (An) and a second shaft is provided as an output (Ab) and is arranged axially parallel to the drive. Three planetary gear sets and additional shafts, along with six shifting elements are provided, through which the actuation of several gears are realized. Machine elements are provided for transfer of torque between the drive (An) and the output (Ab). The first shaft is connectable, as drive (An) to the planetary gear carrier of the first planetary gear set, to the sun gear of the second planetary gear set, to the ring gear of the first planetary gear set, to the planetary gear carrier of the second planetary gear set and to the first spur gear stage. The second shaft is connected or connectable, as a drive (Ab), to the first machine element and to the second machine element.

Multi-speed transmission in planetary design

A transmission includes a drive shaft, an output shaft, a housing, and a first through third planetary gear sets. Six shift elements include a first brake, a second brake, and first through fourth clutches. The shift elements are selectively actuated, by which ten forward gears and one reverse gear can be. Each planetary gear set features at least one sun gear, one planetary gear, one planetary carrier and one ring gear. The drive shaft and the output shaft are arranged in a manner axially offset to each other. The drive shaft is connectable to the sun gear of the third planetary gear set and the second brake through the first clutch, and is connectable to the planetary carrier of the third planetary gear set through the second clutch. The planetary carrier of the third planetary gear set is connected to the first brake.

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Friedrichshafen, Germany

Christian Sibla