Zf Friedrichshafen Ag

Christian Selinka

Reinhold Mayer

Thomas Meid

Dirk Huhn

Michael Ptock

Michael Huber

Thomas Riess

Stefan Pümmler

Günter Grau

Reinhold Mayer-Jabs

Thomas Rieß

A method for operating an open 3-line type hydrodynamic coupling device, in which a fluid pressure displacing a clutch piston in an engaging direction is provided in the first space area for engaging the lockup clutch, and a fluid pressure displacing the clutch piston in the disengaging direction is provided in a second space area for disengaging the lockup clutch. A fluid supply pressure for the first space area and/or a fluid supply pressure for the second space area are/is adjusted depending on at least one operating variable in the engaged state of the lockup clutch and/or in the disengaged state of the lockup clutch and/or for engaging the lockup clutch and/or for disengaging the lockup clutch.

Method for the operation of an open 3-line type hydrodynamic coupling device

A hydrodynamic retarder having a first blade wheel and having a second blade wheel concentric thereto, together forming a hydrodynamic circuit grouped about a common rotary axis. Each blade wheel is made of a base body and a blade arrangement fixed thereto including a plurality of blades. The hydrodynamic circuit is supplied by a fluid inlet, while the fluid removal from the hydrodynamic circuit is performed by a fluid outlet. The fluid inlet has an inlet spiral enabling tangential fluid flow and the fluid outlet has an outlet spiral enabling tangential fluid flow. At least one inlet spiral is associated with a flow guide guiding the fluid into the hydrodynamic circuit with at least one axial component.

Hydrodynamic retarder

A hydrodynamic retarder having a first blade wheel and a second blade wheel concentric thereto, forming a hydrodynamic circuit grouped about a common rotary axis. Each blade wheel includes a base body and a blade arrangement fixed thereto including a plurality of blades each connected to receptacles in the base body. A first ring segment of at least one blade wheel includes at least one first blade having a flow edge facing the other blade wheel in each case, said edge having at least one extension running in a substantially straight line between the radial outer end thereof and the radial inner end thereof, and at least one second blade is provided in a second ring segment of the blade wheel, the blade having a retraction both opposite the flow edge facing the other blade wheel in each case, and opposite a protrusion protruding in the direction of the other blade wheel.

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Poppenhausen, Germany

Christian Selinka