Zf Friedrichshafen Ag

Michael Preuß

Bernard Hunold

Johannes Kaltenbach

Johannes Glückler

Alexander Thorwart

Stefan Renner

Thomas Martin

Christian Mittelberger

Rayk Gersten

Niclas Raeder

A drive unit has first and second electrical machines arranged axially parallel, a manual gearbox arranged axially parallel to the electrical machines, a differential, a drive shaft, an output shaft, and a positive-locking shift unit having a first shift element, a second shift element, and a sliding sleeve displaceable via a first actuator into one of three shift positions. In a first shift position, the first shift element is closed and the second electrical machine is connected to the drive shaft with an actuating effect; in a second shift position, both shift elements are open and the second electrical machine is decoupled from the gearbox; in a third shift position, the second shift element is closed and the second electrical machine is connected to the output shaft with an actuating effect. The drive shaft is hollow, and the output shaft is arranged within the drive shaft.

Drive unit for a vehicle

A device for a vehicle drivetrain has an axle differential, a differential blocking device for blocking and releasing the equalization function of the axle differential, a parking lock for blocking and releasing the drive output of the vehicle drivetrain, and an actuation mechanism configured to be driven by a drive unit. By way of the actuation mechanism, the differential blocking device and the parking lock can be actuated by the drive unit. Actuating the parking lock and the differential blocking device are correlated with one another in such manner that at the end of a first phase of actuation, only the equalization function of the axle differential can be blocked and the parking lock is in its disengaged condition. At the end of a second phase of actuation, the equalization function of the axle differential can be blocked, and the parking lock can be engaged.

Device for a vehicle driveline with an axle differential

Disclosed is a starting device for a transmission. The starting device includes a drive input shaft provided for coupling the starting device to a drive engine connected upstream from the transmission. An output shaft is configured to connect the starting device to a gearset of the transmission. The drive input shaft and the output shaft can be connected rotationally fixed to one another by means of a first shifting element. An electric machine is provided whose rotor is connected to an intermediate shaft. The intermediate shaft is coupled to the output shaft by way of at least one gear step. In order to realize integration of the upstream drive engine and the electric machine, a second shifting element is also provided which, when actuated, forms a rotationally fixed connection between the intermediate shaft and the drive input shaft.

Starting device for a transmission

A transmission arrangement for a hybrid drive of a motor vehicle, in particular a utility vehicle, having change-speed transmission (G) with a drive output shaft (AW), a retarder (RE) with a retarder shaft (RW), an electric machine (EM) with a rotor shaft (RO) and a first gear ratio step (&#xdc;) between the drive output shaft (AW) and the retarder shaft (RW). The retarder (RE) is driven by way of the first gear ratio step (&#xdc;). The electric machine (EM) is arranged with its axis parallel to the retarder (RE) and can be coupled to the retarder shaft (RW) by way of a second gear ratio step (&#xdc;).

Transmission arrangement for a vehicle hybrid drive

A method of operating a vehicle having a hybrid drive, a transmission with shift elements, a drive output with a brake, a main transmission with input shafts, an output shaft and planetary gear sets (PG, PG). The main transmission has five gear planes. One shift element can connect a gear plane to an element of gear set (PG) adjoining the main transmission. Another shift element couples a further element of gear set (PG) either to the output shaft or a housing. An electric machine is permanently connected to an element of gear set (PG). If, while driving with a transmission gear engaged, the drive output brake is engaged for a full brake application, a shift element of the transmission is first relieved by the electric machine and/or a brake assigned to one of the input shafts and then subsequently disengaged to decouple the combustion engine from the drive output.

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Friedrichshafen, Germany

Michael Preuß