Zf Friedrichshafen Ag

Zf Sachs Ag

Jürgen Ackermann

Christoph Sasse

Erwin Wack

Jörg Sudau

Peter Frey

Ralf Rönnebeck

Thomas Adelmann

Hermann Schleicher

Frank Zerner

Christoph Gajda

Michael Heuler

Khalid Jafoui

A hydrodynamic clutch device includes a pump wheel, a housing connecting the pump wheel to a drive, a turbine wheel connected to a takeoff, the turbine wheel being located in the housing and cooperating with the pump wheel to form a hydrodynamic circuit, and a bridging clutch located in the housing and having a piston located between the hydrodynamic circuit and a pressure space. The piston is movable between an engaged position and a released position. At least one through opening in the piston allows an exchange of clutch fluid between the hydrodynamic circuit and the pressure space regardless of the position of the piston and a non-return valve allows only flow from the hydrodynamic circuit to the pressure space when the clutch is released.

Hydrodynamic clutch device

A hydrodynamic clutch device has at least one pump wheel, connected to a drive by way of a clutch housing, and a turbine wheel, connected to a takeoff, to form a hydrodynamic circuit. The device also has a bridging clutch with at least one piston, which can shift between a released position and an engaged position, and at least one friction surface acting between this piston and an adjacent support to connect the drive to the takeoff. When the piston is in the released position, the bridging clutch allows the hydrodynamic circuit to be used to transmit at least most of the torque between the drive and takeoff, whereas, when the piston is in the engaged position, the bridging clutch produces a bypass around the hydrodynamic circuit for the transmission of torque. The barrier clutch cooperates with at least one pressure barrier installed between the hydrodynamic circuit and the pressure space. This separation more-or-less completely prevents the exchange of clutch fluid between the hydrodynamic circuit and the pressure space, regardless of the instantaneous position of the piston between its released position and its engaged position and thus regardless of the shift status of the bridging clutch.

A hydrodynamic clutch device includes a clutch housing connected to a drive, a pump wheel connected to the clutch housing, and a turbine wheel connected to a takeoff, the turbine wheel and the pump wheel forming a hydrodynamic circuit. A bridging clutch which is essentially surrounded by the hydrodynamic circuit includes a piston and a friction surface which can be acted on by the piston to connect the drive to the takeoff independently of the hydrodynamic circuit, the piston having one surface facing a pressure space and an opposite surface facing the hydrodynamic circuit. A pressure circuit includes a first pressure medium line to supply the hydrodynamic circuit with clutch fluid and a second pressure medium line to supply the pressure space with clutch fluid. A seal at least reduces the exchange of fluid between the hydrodynamic circuit and the pressure space, and a throttle allows a defined exchange of fluid between the hydrodynamic circuit and the pressure space.

A hydrodynamic clutch device includes a clutch housing connected to a drive, a pump wheel connected to the clutch housing, and a turbine wheel connected to a takeoff, the turbine wheel and the pump wheel forming a hydrodynamic circuit. A bridging clutch which is essentially surrounded by the hydrodynamic circuit includes a piston and at least one friction surface which can be acted on by the piston to connect the drive to the takeoff independently of the hydrodynamic circuit, the piston having one surface facing the hydrodynamic circuit and an opposite surface facing a pressure space. A pressure circuit includes a first pressure medium line to supply the hydrodynamic circuit with clutch fluid and a second pressure medium line to supply the pressure space with clutch fluid. A seal at least reduces the exchange of fluid between the hydrodynamic circuit and the pressure space, and a throttle allows a defined exchange of fluid between the hydrodynamic circuit and the pressure space.

A clutch arrangement for a motor vehicle has a clutch housing that is filled with pumped medium in the form of fluid, a first friction element being rotatable in common with the clutch housing. Further, a second friction element is provided which is rotatable in common with a driven member and which can be brought into an operative connection with the at least one first friction element for producing a frictional interaction. At least one first friction element and at least one second friction element are each provided with a support component that can be provided for receiving at least one friction lining. The support components have support component segments which are arranged successively in circumferential direction and which are provided at a circumference-side terminating edge, respectively, with fluid delivery surfaces for generating a fluid circulation and are constructed in the form of friction lining segments to produce the frictional interaction with friction linings. The fluid delivery surfaces adjoin a cutout of the support component in each instance.

Clutch arrangement

A hydrodynamic torque converter which has at least a hydrodynamic circuit including at least one pump wheel and one turbine wheel, wherein each of these wheels is provided with an outer shell to accept a set of vanes which form flow chambers, the inner edges of the vanes away from the outer shell being connected to an inner shell, which acts as part of an internal torus. At least the vanes of the turbine wheel have connecting elements both on the inner edges and on the outer edges, which connecting elements pass through openings in the shells to fasten the vanes to the shells, being provided for this purpose with a predetermined minimum overhang with respect to the edge of the associated vane, this minimum overhang making it possible for the connecting elements to be plastically deformed in such a way that they can grip the rear surfaces of the shells, i.e., the surfaces facing away from the vanes, and thus fasten the vanes to the shells. The connecting elements are designed in such a way that, without detriment to the predetermined ability to withstand the pressure produced by the hydrodynamic circuit, it is possible to introduce and to fasten the vanes easily, even in the case of rotors with extremely small radial dimensions and thus with very sharply curved outer and inner shells for the vanes.

Hydrodynamic torque converter

A torsional vibration damper for a piston-equipped bridging clutch of a hydrodynamic clutch device includes a drive-side transmitting element for at least one damping unit, which is in working connection by way of a transmitting element on the power takeoff-side with a power takeoff component assigned to it, where at least one angle of rotation limiter is assigned to the damping unit. At least one projection is provided on one of the transmitting elements, this projection extending toward the other transmitting element and engaging in an assigned recess in the other transmitting element with predetermined play in the axial direction to form an angle of rotation limiter, where the recess is provided with an appropriate circumferential dimension for the projection to ensure the possibility of a predetermined relative deflection between the two transmitting elements.

Torsional vibration damper

A torsional vibration damper on the bridging clutch of a hydrodynamic clutch arrangement has a first connecting device, which can be brought into working connection with the clutch housing and with a drive-side transmission element. The drive-side transmission element is connected via first energy-storage devices to an intermediate transmission element. The torsional vibration damper also has a second connecting device for establishing a working connection via second energy-storage devices between the intermediate transmission element and a takeoff-side transmission element, which is connected to a takeoff-side component of the hydrodynamic clutch arrangement. The intermediate transmission element accepts a mass element, located operatively between the two connecting devices.

Growing community of inventors

Schweinfurt, Germany

Jürgen Ackermann