Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Ina Schaeffler Kg

Schaeffler Technologies Ag & Co .kg

Luk Lamellen Und Kupplungsbau Gmbh

Ina Walzlager Schaeffler Ohg

Thomas Bertelshofer

Ludwig Winkelmann

Dieter Adler

Harald Peschke

Roland Welter

Karl-Ludwig Grell

Rainer Venz

Ulrich Helfmeier

Uwe Stratil

Andreas Lang

Rainer Pflug

Martin Assel

Arbogast Grunau

Christian Schäfer

Eduard Kratz

Alfred Strasser

Harald Schäfer

Thomas Ebner

Dietmar Jäger

Gerd Wiessner

Marco Orsi

Jurgen Schwab

Tino Haensel

Thomas Kleiber

Peter Kelm

Rainer Baumueller

A tensioner for a traction drive includes a cylinder arranged in a housing at a distance to a housing wall to thereby define an interior space which contains hydraulic fluid. A piston is received in the cylinder for back-and-forth movement and bounds a pressure chamber containing hydraulic fluid. The piston has a cylinder-distal end which is operatively connected to a spring-biased tension roller supported on a traction member. Formed between the piston and the cylinder is a leakage gap, and a reservoir for hydraulic fluid is provided in an area of the leakage gap to prevent ingress of air into the pressure chamber, when the traction drive is at a rest.

Hydraulic tensioner

Traction mechanism drive for an internal combustion engine, having a crankshaft gear wheel, at least one gear wheel which is arranged on a driven shaft, a wrap-around means and an electric machine which can be actuated in order to reduce rotational non-uniformities, the electric machine () having a rotor () which is arranged on the or a camshaft () and interacts with an immobile stator ().

Traction mechanism drive

The invention relates to a tensioner () for a traction drive with a rotationally fixed housing () to a side of which a rotatable swivel arm (), provided with a rotatable tension roller, is associated. A torsion spring () is placed between the housing () and the swivel arm () for loading the swivel arm () in the direction of an end position. Support of the tension spring () is realized by an insert () placed in a circular ring shaped space () radially defined by a housing portion and the torsion spring ().

Tensioner for a traction drive

A master cylinder for use in the power train of a motor vehicle to actuate the brakes or the friction clutch is designed to avoid the generation of screeching noise and/or the transmission of stray movements to the piston rod in response to shifting of the piston relative to the housing and relative to the sealing element(s) between the piston and the housing. This can be accomplished by causing the piston to turn relative to the housing and the sealing element(s) during axial movement in the housing and/or by installing one or more dampers between the piston and the housing and/or between the piston and the piston rod. The dampers can constitute separately produced parts and/or specially configured and/or finished surfaces provided on the piston and contacting the housing and/or the sealing element(s). The invention also relates to improvements in the configuration and/or the material(s) of the piston.

Master cylinder for use in power trains of motor vehicles

A device ( ) for hydraulic rotational angle adjustment of a camshaft relative to a crankshaft of an internal combustion engine including a drive unit ( ) connected with the crankshaft and an output unit ( ) non-rotatably connected with the camshaft. The drive unit ( ) stands in power transmitting connection with the output unit ( ) through at least two pressure chambers ( ) formed inside the device ( ) which bring about, under action by pressure under continuous compensation for external pressure leakages, a relative rotation or a hydraulic clamping of the output unit ( ) in relation to the drive unit ( ). In addition, the device ( ) has a coil spring ( ) arranged outside the device which is provided for adaptation of its adjustment speeds in both adjustment directions. The coil spring ( ) is arranged via enclosure in an additional housing ( ) in a closed annular space which is completely fillable with the external pressure medium leakages of the device ( ), whereby the hydraulic pressure medium acts at the same time as a damping agent against sympathetic resonant vibrations of the spring turns ( ) of the coil spring ( ) resulting from vibrations of the internal combustion engine.

Device for altering the control timing of gas exchange valves of an internal combustion engine, especially an apparatus for hydraulic rotational angle adjustment of a camshaft relative to a crankshaft

Growing community of inventors

Ebermannstadt, Germany

Thomas Bertelshofer