Zf Friedrichshafen Ag

Other

Zg Friedrichshafen Ag

Johannes Glückler

Johannes Kaltenbach

Stefan Renner

Kai Bornträger

Stefan Spühler

Rayk Gersten

Michael Trübenbach

Christian Mittelberger

Peter Ziemer

Thomas Martin

Stefan Beck

Michael Wechs

Jens Moraw

Gerhard Niederbrucker

David Rittler

Fabian Kutter

Bernard Hunold

Christoph Margraf

Andreas Beisswenger

Stefan Brom

Michael Preuß

Morten Scherpelz

Paul Lenz

Stefan Blattner

Jochen Breuer

Martin Jelinewski

David Wörzler

Alexander Maier

Andreas Heinzler

Mladjan Radic

Thorsten Leim

Timo Hele

Rick Hauschwitz

A vehicle powertrain features a first electrical machine with first power electronics, a second electrical machine with second power electronics, and a transmission connected between the electrical machines and an output. To execute a powershift, the first and second electrical machines are operated so that one of the electrical machines is used as the main drive machine, and the other electrical machine is used for tractive force support during the execution of the powershift. When a temperature of at least one of the electrical machines and/or of at least one of the power electronics exceeds a temperature limit value, and/or when a target electric current flowing through at least one of the electrical machines and/or at least one of the power electronics exceeds a current limit value, a powershift is adapted to limit heating of the respective electrical machine and/or the respective power electronics.

Method and control device for operating a vehicle driveline

A vehicle powertrain has a first electrical machine with first power electronics and a second electrical machine with second power electronics. In symmetrical operation, the first and second electrical machines are loaded or operated with the same torque and with the same torque gradient. In a non-symmetrical operation, the first and second electrical machines are loaded or operated with a different torque and/or with a different torque gradient. If, after non-symmetrical operation the symmetrical operation is resumed, a subsequent modified operation can be used in which the electrical machine that was loaded or operated in non-symmetrical operation with higher torque and/or a higher torque gradient, is loaded or operated with a limited torque and/or with a limited torque gradient or is switched off or decoupled for a defined period of time, thereby at least partially compensating for a different aging of the electrical machines due to non-symmetrical operation.

A drive unit for a vehicle includes an electric machine and a manual gearbox with at least a first shift element, a second shift element, a third shift element and two planetary gear sets coupled to one another and each having a sun shaft, a hollow gear shaft, and a web shaft. The second hollow gear shaft is connected rotationally fixed to the first web shaft. The first sun shaft is connected to a stationary component. In the respective actuated states, the first shift element locks the first planetary gear set to shift a first gear, the second shift element connects the first hollow gear shaft to the second web shaft to shift a second gear, and the third shift element connects the first hollow gear shaft to the second sun shaft to shift a third gear.

Drive unit for a vehicle

A vehicle drive unit has an electric machine and a manual gearbox with first and second shift elements and two planetary gear sets coupled to one another. Each gear set has a sun shaft, a ring gear shaft, and a web shaft. The second sun shaft is drivable by the electric machine and is configured as an output of the shift gear. The second ring gear shaft is connected rotationally fixed to the first web shaft, and the first sun shaft is connected rotationally fixed to a stationary component. When actuated, the first shift element connects the first ring gear shaft to an element of the first planetary gear set and/or of the second planetary gear set. When actuated, the second shift element connects the first ring gear shaft rotationally fixed to the second sun shaft or the second web shaft in order to shift a second gear.

A motor vehicle transmission () has a drive input shaft (), a drive output shaft () and a first planetary gearset (P), and a second planetary gearset (P), where the drive input shaft () is provided for coupling to a drive machine. In addition, a first shifting element (A) and a second shifting element (B) are provided, at least functionally. Also disclosed are a drive unit (), a motor vehicle drivetrain, a hybrid or electric vehicle, and a method for operating a motor vehicle transmission.

Motor vehicle transmission for an at least partially electrically driven motor vehicle

A motor vehicle transmission () has a drive input shaft (), a drive output shaft (), a first planetary gearset (P), and a second planetary gearset (P). The drive input shaft () is provided for coupling to a drive machine. In addition, a first shifting element (A) and a second shifting element (B) are provided, at least functionally. Also disclosed is a drive unit (), a motor vehicle drivetrain, a hybrid or electric vehicle, and a method for operating a motor vehicle transmission.

A stator (1a, 1 b) for an electric machine. The stator (,) is fixedly mounted relative to a rotational axis (Rot). The stator () comprises a stator yoke () that extends in the axial (A) and radial (R) directions. Stator teeth (), facing toward the rotational axis (Rot), are arranged in a ring shape on the stator yoke (). The teeth are uniformly spaced apart from one another so that a stator groove () is formed therebetween. The stator (,) is divided into a first stator section () and a second stator section (). First and second outer walls () are provided on the stator yoke () and serve to axially support the stator yoke (). A cooling manifold disk () is integrated between the first stator section () and the second stator section (). An electric machine with a stator of that type is also disclosed.

Stator for an electric motor and an electric motor

A drive axle of an electric vehicle has first and a second drive wheels (R, R) with wheel axles (a, a), a first electric machine (EM) and a second electric machine (EM) with a common rotation axis (m), a transmission (G) with a transmission input shaft (EW) and a transmission output shaft (AW), and an axle differential (DI) with a differential input (DIK) and two differential output shafts (). The first electric machine (EM) is connected to the transmission input shaft (EW) and the transmission output shaft (AW) is connected to the differential input (DIK). The second electric machine (EM) can be connected as an additional drive when necessary.

Drive axle of an electric vehicle and powershifting method

The invention relates to a motor vehicle transmission () comprising a drive input shaft (), a drive output shaft (), a first planetary gearset (P), a second planetary gearset (P), and a third planetary gearset (P), where the drive input shaft () is provided for coupling to an electric machine (). Furthermore, at least functionally a first shifting element (A), a second shifting element (B), and a third shifting element (C) are provided. In addition, the invention relates to a drive unit (), a drive axle (), and an electric vehicle.

Motor vehicle transmissions, in particular electric vehicle transmissions

The invention relates to a motor vehicle transmission () having a drive input shaft (), a drive output shaft (), a first planetary gearset (P), a second planetary gearset (P), and a third planetary gearset (P), where the drive input shaft () is provided for coupling to an electric machine (). Furthermore, at least functionally a first shifting element (A), a second shifting element (B), and a third shifting element (C) are provided. In addition, the invention relates to a drive unit (), a drive axle () and an electric vehicle.

A drive axle for an electric vehicle which comprises first and second electric machines (EM, EM), first and second drive wheels (R, R) and first and second two-speed transmissions (G, G) each having the same gear ratios. The first electric machine (EM) drives the first drive wheel (R) by way of the first two-speed transmission (G) and the second electric machine (EM) drives the second drive wheel (R) by way of the second two-speed transmission (G). The first and the second two-speed transmissions (G, G) each comprise a first planetary gearset (PS) and a second planetary gearset (PS) coupled to one another. The first planetary gearset (PS) and the second planetary gearset (PS) each comprise a web shaft (ST, ST), a ring-gear shaft (HR, HR) and a sun-gear shaft (SO, SO).

Drive axle for an electric vehicle

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

An electric vehicle transmission () has a drive input shaft (), a drive output shaft (), a first planetary gearset (P), a second planetary gearset (P), and a third planetary gearset (P). The drive input shaft () is designed to be coupled to an electric machine (). In addition, at least functionally a first shifting element (A), a second shifting element (B), a third shifting element (C), and a fourth shifting element (D) are provided. Also disclosed is a drive system (), a vehicle drive-train (), and an electric vehicle incorporating an electric vehicle transmission of this type.

Electric vehicle transmission

A drive arrangement for an element vehicle, having first and second drive wheels (R, R), a first electric machine (EM) and a second electric machine (EM) with a common rotational axis (m), a manual transmission (G) with a transmission input shaft (EW) and a transmission output shaft (AW) and an axle differential (DI) with a differential input (DIK) and two differential output shafts (). The first electric machine (EM) is connected to the transmission input shaft (EW) and the transmission output shaft (AW) is connected to the differential input (DIK), and the second electric machine (EM) can, if necessary, be engaged as an additional drive.

Drive arrangement for an electric vehicle and method for power shifting

A transmission having planetary gearsets (RSRSRSRSRS). Elements (STST) of gearsets (RSRS) form input and output shafts, respectively. Element (SO) of gearset (RS) couples element (HO) of gearset (RS) and can be immobilized by shift element (A). Element (ST) of gearset (RS) couples element (HO) of gearset (RS). Element (HO) of gearset (RS) can be immobilized by shift element (B). Elements (SOST) of gearsets (RSRS) can connect by shift element (C). Elements (HOSOSO) of gearsets (RSRSRS) couple and can couple element (SO) of gearset (RS) by shift element (E). An element of gearset (RS) is connected to an element of gearset (RS), while another element of gearset (RS) can be connected by shift element (D) to another element of gearset (RS). Elements (SOST) of gearsets (RSRS) are connected and can be immobilized by shift element (F).

Growing community of inventors

Friedrichshafen, Germany

Johannes Glückler