Daimler Ag

Mercedes-benz Aktiengesellschaft

Daimler Truck Ag

Daimler Chrysler Ag

Dalmler Ag

Detlef Schnitzer

Frank Steffens

Jens Luckmann

Carsten Gitt

Ingo Pfannkuchen

Manfred Guggolz

Werner Hillenbrand

Helmut Bender

Fritz Ehret

Marc Stroelin

Markus Veit

Alexander Weidler

Guenter Kayran

Carsten Schupp

Uwe Mueller

Wolfgang Trick

Marc Klein

Xiayoi Liu

Michael Schultheiss

Albrecht Koellermeyer

A hybrid-electric powertrain includes an internal combustion engine, a transmission, and an electric machine, where the electric machine is connected to the transmission for transmitting torque. The transmission has a transmission housing, within which there is disposed an output-side gear set assembly, and also a transmission housing cover disposed on an output side of the transmission as seen in an axial direction. The electric machine has a stator, a rotor, a rotor shaft connected to the rotor for conjoint rotation, and an electric machine housing. In addition, the electric machine has a connection housing for connecting the electric machine to the transmission housing. The rotor shaft of the electric machine is disposed parallel to a transmission input shaft of the transmission.

Hybrid-electric powertrain and lorry equipped with same

A group transmission device includes an upshift assembly with a first transmission element, a second transmission element and a third transmission element. A downshift assembly has a first transmission element, a second transmission element and a third transmission element. A main shaft is arranged coaxially to the upshift assembly and a layshaft is arranged parallel to the main shaft. A first idler gear is arranged coaxially to the main shaft and axially between the upshift assembly and the downshift assembly and is connectable to the main shaft for conjoint rotation by a first shift unit. The first idler gear is connectable to the third transmission element of the downshift assembly for conjoint rotation by a second shift unit.

Group transmission device, in particular split transmission

A range-change transmission device, which is a splitter transmission, includes an input shaft, an output shaft, a countershaft, at least one planetary gear set, and a torque adjustment device. A first transmission element of the planetary gear set is arranged coaxially to the output shaft. A second transmission element of the planetary gear set is or can be directly coupled to the countershaft. A third transmission element of the planetary gear set is permanently coupled to the input shaft in a rotationally fixed manner. The countershaft is or can be coupled to the torque adjustment device. The range-change transmission device has a first switching unit, which is provided to couple the countershaft to the output shaft.

Range-change transmission device

A range-change transmission device includes an input shaft, an intermediate shaft, a countershaft, a transmission output shaft, and a first planetary gear set. A first transmission element of the first planetary gear set is permanently coupled to the intermediate shaft in a rotationally fixed manner. A second transmission element of the first planetary gear set is coupled to the transmission output shaft. A first switching unit is provided to arrange a third transmission element of the first planetary gear set to be fixed to the housing in at least one switching position. The range-change transmission device also includes a second planetary gear set. A third transmission element of the second planetary gear set is permanently coupled to the intermediate shaft in a rotationally fixed manner.

A range-change transmission device includes a main shaft, an output shaft, and a range-change unit. The range-change unit has at least one planetary gearbox, which includes at least one first gearbox element, at least one second gearbox element, and at least one third gearbox element. The range-change unit also has at least one shifting device, which is provided at least for the selective connection of the main shaft to the first gearbox element and/or to the second gearbox element.

In a motor vehicle drive train device with a drive engine and a drive train which has a first coupling unit in the form of a clutch arranged close to the drive engine and at least one second coupling unit arranged in the flow of force from the drive engine close to the drive wheels of the vehicle, a control unit is provided which controls the coupling units and which has an overrun operating mode wherein, at a first point, the drive engine can be disconnected from the drive train by opening the clutch and, at a second point, the coupling units close to the drive wheels can be disengaged so as to disconnect the drive train also from the drive wheels.

Motor vehicle drive train

In a dual clutch transmission with a main group and final shift group, with a coupling device for coupling a transmission element of the main group to a final shift group transmission element of the final shift group, the transmission comprises two transmission gears (VL, VL, VH, VH) which can be formed simultaneously with one of the transmission gears (VL, VL) assignable to a lower group of the final shift group and another of the transmission gears (VH, VH) assignable to an upper group of the final shift group.

Dual clutch transmission device

In an automated split path transmission with at least six forward speeds and three characteristic transmission steps (s, s, s), which decrease with the height of the forward speed, one of the forward speeds is a direct gear and the power of a further forward speed passing through two constant gearsets of the split path group.

Automated shift transmission

In a gear shift device for an automated shift transmission of a motor vehicle having a main transmission and an auxiliary group, wherein a series of gear shift elements, for example in the form of gear shift forks, have to be operated, piston cylinder units for shifting the main transmission are combined in a gear shift module and the piston cylinder units for shifting the auxiliary group are arranged spaced apart from the gear shift module of the main transmission but connected to the gear shift module via a fluid line.

Gear shift device for an automatic transmission of a motor vehicle

In a gear shift module for an automatic transmission of a motor vehicle including a series of gear shift elements for example in the form of gear shift forks, which are operated for the shifting of gears, a gear shift module is provided which has a module baseplate forming part of the cylinders of piston-cylinder units and at least part of a housing of a countershaft brake and a central clutch disengager of a starting clutch. These parts can be manufactured jointly providing for lower manufacturing and assembly costs.

Gear shift module for an automatic transmission of a motor vehicle

The invention is based on a drive train () of a motor vehicle in which a control device () limits an output torque of a drive machine () to a first maximum value or a second, higher maximum value. The object of the invention is to propose a drive train which permits low fuel consumption. According to the invention, the control device () has a signal transmitting connection to a roadway information device (camera) which supplies information relating to a profile of the roadway in front of the motor vehicle. The control device () can thus predictively change from the first maximum value to the second maximum value or carry out shifting back in the transmission ().

Drive train of a motor vehicle

In a commercial vehicle transmission with a main group and a downstream group including a downstream group countershaft, the downstream group includes means for decoupling the downstream group countershaft in direct through drive so that in direct through-drive the countershaft does not run in an oil sump and no churning losses occur thereby increasing vehicle transmission efficiency.

Transmission for a commercial vehicle with a main group and a downstream group

In a transmission for a motor vehicle of a reduction gearing design with power branching including a main shaft and a counter shaft, a first component transmission and a planetary gear unit, power is branched to the countershaft by the first component transmission in certain gears and recombined via the planetary gear unit and a direct power transmission path is provided wherein the countershaft is decoupled selectively by means of a control device.

Automated motor vehicle transmission and method of operating the same

A method for operation of a drive train having a drive machine and an automatic, unsynchronized gearwheel variable-speed transmission, which can be connected to the drive machine by using an automatic clutch is described. A control device carries out a selection process as a function of vehicle parameters and/or operating variables of the motor vehicle to determine whether a gear change of the unsynchronized gearwheel variable-speed transmission will be carried out with the clutch engaged or disengaged. To ensure reliable operation of the motor vehicle, a gear change is carried out with the clutch disengaged in a time interval after initial starting up of the drive train and/or after starting of the drive machine and/or when a malfunction is identified in a component in the drive train.

Method for controlling a drive train

In a method of operating a drive train of a motor vehicle including a drive motor with a multi-unit transmission including an unsynchronized main transmission and a synchronized output drive unit, wherein, for performing a shift in the unsynchronized main transmission, a speed synchronization is carried out by means of the drive motor for the engagement of a target gear and, in an emergency mode of the drive motor, a clutch arranged between the drive motor and the main transmission is disengaged, the output gear unit is placed into neutral, the target gear is engaged, the output drive unit is placed into a drive position and the clutch is at least partially engaged.

Growing community of inventors

Denkendorf, Germany

Detlef Schnitzer