Zf Friedrichshafen Ag

Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Luk Lamellen Und Kupplungsbau Gmbh

Paul Granderath

Wolfgang Reik

Stephan Maienschein

Marc Meisner

Jean-Francois Heller

Gunnar Back

Hubert Friedmann

Bruno Müller

Josef Haupt

Christian Ruhl

Hagen Dopfert

A planetary gear set lubricating unit which supplies oil from inside a component adjacent the planetary gear set, via a radial bore and an oil catcher, axially through a bore of a planetary gear bolt to planetary gear bearings. The oil catcher forms a ring-shaped chamber, which can be filled with lubricant, and is arranged beside the planetary carrier approximately over the reference diameter of the planetary bolt. The oil catcher has outlet pipes extending axially to direct oil in the chamber. The oil catcher has ovular radial protrusions arranged such that a maximum radial dimension is close to the bolts and a minimum radial dimension is arranged between adjacent planetary bolts. The radially inner edge of the axial bore of the planetary bolts is radially located between the minimum and maximum dimensions of the protrusions. The chamber is delimited by a cover plate and a gasket.

Planetary transmission

A hydrokinetic torque converter with a built-in bypass clutch is provided with an arrangement which regulates the cooling of the clutch at a rate dependent upon the slip between the coaxial driving and driven parts of the clutch, and hence upon the quantity of generated friction heat. The cooling unit for the driving and/or driven part of the clutch can employ, for example, one or more pumps; a supply of a substance which changes its aggregate state from liquid to gaseous or from solid to flowable in response to heating, and vice versa in response to cooling; one or more porous washers in the path for the flow of hydraulic fluid between the customary plenum chambers provided in the housing of the torque converter to move a piston of the driven part of the clutch into and from frictional engagement with the housing; and/or a system of recesses, grooves, channels and/or other passages serving to convey fluid between the chambers at a rate which is higher or highest when the clutch operates with maximum slip. Such rate can decrease to zero when the torque converter is idle or the clutch is fully engaged to operate without slip.

Torque transmitting apparatus

A slipping friction clutch which has at least on a pair of wet-running friction areas, especially a slipping converter bridging clutch for the hydrodynamic torque of a motor vehicle automatic transmission. In the state under the action of pressure, the two friction areas seal off the radially outward lying high pressure chamber against the radially inward lying lower pressure chamber, whereby at least one of the friction areas has oil-conducting depressions whose ends spaced from one another are directly hydraulically connected with the one of the two pressure chambers and which are configured such that, with a slipping friction coupling, the friction area sliding peripherally exerts a drag action owing to which an oil through flow is induced as a function of the slippage rotational speed which cools the friction area.

Friction clutch, especially a torque converter lockup clutch for a hydrodynamic torque converter

Growing community of inventors

Meckenbeuren, Germany

Paul Granderath