Zf Friedrichshafen Ag

Gerhard Bailly

Jurgen Pohlenz

Unal Gazyakan

Thomas Ratzmann

Karl Grad

Detlef Baasch

Walter Fischer

Gerold Bieber

Jürgen Pohlenz

Martin Spiess

Manuel Gotz

Christoph Goebel

Willibald Probst

Juergen Pohlenz

Tobias Weber

Oliver Rumpf

A power split transmission which has a first part () and a second part (). The first part () includes a variator (), a summing gearset () and a shiftable transmission gear assembly (). A standard transmission can be used as the multispeed transmission ().

Power split transmission

A transmission device with at least one electrical variator for the continuous variation of a transmission ratio and with power branching. A planetary gear unit is coupled to a transmission input shaft and to a shaft of the electrical variator, and also to a change-speed gearbox, in the area of which, in combination with the electrical variator, a number of transmission ratio ranges can be produced. Within the transmission ratio ranges, the transmission ratio of the transmission device can in each case be varied continuously by the electrical variator. Along the power path, between the shaft of the electrical variator connected to the planetary gear unit and the planetary gear unit itself, a mechanism is provided where at least part of the torque transmitted along the power path, between the electrical variator and the planetary gear unit, can be reinforced.

Gear device having at least one electrical variator for the continuous variation of a transmission and comprising power split

A continuously variable transmission device () has a power split which takes place in the area of a sum planetary transmission (). A first shaft () of the sum planetary transmission () can be brought into operational connection with a drive engine or machine (). A second shaft () of the sum planetary transmission () can be connected, for continuous variation of the gear ratio, with an electric machine () which itself can be coupled with an electric energy source ().

Continuously variable transmission device having power split

A continuously variable transmission device () for a vehicle with a variator (), a planetary gear unit () and a manual gear unit () arranged in a transmission housing. The variator () is connected with the planetary gear unit () and with the manual gear unit () in the area of a first shaft () and in the area of a second shaft (). The variator () and the planetary gear unit () form a module () and are arranged on a common carrier plate ().

Variable transmission device for a vehicle

A transmission device () for a vehicle having a variator () that has an axially longer length that the variator () is wider and deeper. The variator () comprises a planetary gear set (), a manual gearbox unit () and a hydraulic system having an oil sump. Following installation in the vehicle, a longitudinal extension of the variator () is oriented at least approximately horizontally.

Transmission device for a vehicle, having a variator

A transmission device for a vehicle () having a variator (), which is configured as a hydrostatic device, of a transverse axial construction that can be adjusted at least in the region of a pivot axis (), a planetary gear set () and a manual gear unit (). The orientation of the pivot axis () of the variator (), following installation in the vehicle, at least approximately corresponds to the orientation of a vehicle vertical axis ().

Transmission device for a vehicle

A method and a device for controlling the slip of a tractor vehicle or the like, in which the drive wheel slip is determined and, if the actual slip is different from a specified nominal slip, the gear ratio of a controllable transmission in the drivetrain is adjusted in the direction of slip optimization. The transmission is a geared-neutral transmission whose output speed, at full drive power, can be adjusted to an extremely small value close to zero.

Method and device for controlling slip in a tractor vehicle or the like

A transmission device () for a vehicle with a variator (), a planetary gear unit () and a gearshift transmission unit (). The variator () has a length which is greater than a width and a depth of the variator (). When the variator () is installed in position in the vehicle, the length of the variator () is orientated at least approximately diagonally to the length of the vehicle.

Transmission device for a vehicle, comprising a variator, a planetary gear unit and a manual transmission unit

A continuously variable transmission device comprising a variator and a secondary power splitting. For power splitting, a planetary gear set has a first shaft coupled to the transmission input, a second shaft of the gear set coupled a first shaft of the variator, and a third shaft of the gear set couples a second shaft of the variator. First and second shift elements are provided to switch between first and second gear ratio ranges. Via the variator, the gear ratio is continuously variable within the gear ratio range and the two gear ratio ranges overlap. To implement the first gear ratio range, the second shaft of the gear set is connected, via the first shift element, to the transmission output, and to implement the second gear ratio range, the third shaft of the planetary gear set is connected, via the second shift element, to the transmission output.

Transmission device having a variator

A power-branched transmission for an agricultural vehicle is configured as a power-branched transmission having a secondary coupling. The transmission comprises a summation planetary gear set (), the planetary gear of which are configured as a double planetary gear ().

Power-branched transmission

A method and a device for actuating a motor vehicle clutch device ( ). A control device ( ) automatically influence the frictional power of the clutch device ( ) in accordance with predetermined criteria ( ) by varying the continuously variable ratio of a vehicle transmission ( ).

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Friedrichshafen, Germany

Gerhard Bailly