Zf Friedrichshafen Ag

Rainer Grundler

Thilo Schmidt

Markus Herrmann

Dirk Winkler

Peter Ziemer

Christian Popp

Christoph Margraf

Thomas Riedisser

Matthias List

Hagen Doepfert

Gerhard Hermann Martin

Reinhard Deppert

Christian Schwemer

Ingo Lippenberger

Ulrich Doerr

Heinrich Zeller

Dietmar Gehring

Valentine Vincent

Sebastian Grimm

Dieter Neumann

Uwe Schraff

Markus Strobel

Jens Wagner

Harald Tiesler

Ahmed Mouhcine

A gear set arrangement () for a bicycle gearbox () includes a planetary assembly, a stationary component (), a first and a second brake (B, B), and a first and a second freewheel clutch (F, F). One planetary gear set () of the planetary assembly includes a first rotary element, a second rotary element, and a third rotary element. The first rotary element is rotationally fixable on the stationary component () by the first brake (B). The first rotary element is connectable to the output () by the first freewheel clutch (F). The second rotary element is rotationally fixable on the stationary component () by the second brake (B). The second rotary element is connectable to the output () by the second freewheel clutch (F). The third rotary element is connected to the input () for conjoint rotation. The gear set arrangement () is configured to provide three ratios.

Gear set assembly and bicycle gearing system

A greaser for a transmission includes a shaft () having an axial bore () and a plurality of axially spaced radial bores (). Each of at least one tube () is inserted into a respective one of the axially spaced radial bores () and extends radially inwardly into the axial bore () beyond a circumferential surface () of the axial bore () that is adjacent the respective one of the axially spaced radial bores (). Each of the at least one tube () includes a slot () at a tube end () facing a central axis () of the shaft (). The slot () of each of the at least one tube () extends along a central axis () of the respective tube () into an interior space of the axial bore ().

Lubricating device for a transmission, and transmission comprising said lubricating device

A drag torque reduction device for an automatic transmission includes a hydraulic controller with a radiator. In one embodiment, the drag torque reduction device also includes a parallel connection of a pressure relief valve, a constant aperture and a temperature-dependent, switchable aperture positioned upstream of the radiator. In another embodiment, the drag torque reduction device includes an overflow cooling oil diversion with a temperature-dependent, switchable aperture and a pressure relief valve that is positioned upstream of the radiator.

Device reducing drag loss in an automatic transmission

An automatic vehicle transmission comprises a first oil supply unit () with at least one mechanically driven first pump () and a second oil supply unit () with at least one electrically driven second pump (), and a valve device () and a clutch system (). The second oil supply unit () supplies the clutch system (), during a first operating condition, and the first oil supply unit () supplies the clutch system (), during a second operating condition.

Hydraulic system of a gear box

A method for determining an oil condition, namely, an oil condition corresponding to the oil age or oil damage, with the following steps: a) measuring a temperature of the oil or of the part through which the oil flows, coordinating each temperature measured with one temperature range defined by an upper limit and/or a lower limit; b) as soon as the measured temperature exceeds or falls below a limit of a temperature range, measuring the period of time during which the measured temperature dwells in this range; c) in addition, integrating an oil flow running during this time over the time period measured in step b); d) from the time period measured in step b) and the integral of the oil flow determined in step c), determining an oil age or oil damage characteristic for the current temperature range.

Method for determinating of an oil condition

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Bodman-Ludwigshafen, Germany

Rainer Grundler