Luk Getriebe-systeme Gmbh

Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Uwe Wagner

Stephan Maienschein

Marc Meisner

Michael Reuschel

Michael Salecker

Alfons Wagner

Martin Rauser

Steven P Olsen

Hartmut Faust

Thomas Heck

Bruno Muller

Frank Uhlmann

Wolfgang Reik

Shailesh Shrikant Kozarekar

Robert Fischer

Mircea Gradu

Edmund Maucher

Volker Middelmann

Wendy Boman

Bruno M&uuml;ller

Andreas Triller

André Teubert

Anton Rink

Jürgen Freitag

Johannes Braun

Bernhard Zimmer

Marco Voigt

Rolling surfaces of rocker pressure members of plate-link chains for conical disk transmissions are constructed as freeform surfaces in such a way that their radius of curvature changes in a direction transverse to the longitudinal extent of the rocker pressure members and/or the thickness in the longitudinal direction of the rocker pressure members changes. In that way, the acoustic properties and the wear behavior of the plate-link chains can be improved.

Plate-link chain

The magnitude of torque which can be transmitted by a bypass clutch between the housing and the turbine of a torque converter between a prime mover, such as an engine, and an automatic transmission in the power train of a motor vehicle is selectively regulatable by a computerized regulating unit. The regulation involves the transmission of torque by the clutch in dependency upon the magnitude of the torque being transmitted by the output element of the engine and ascertaining as well as adaptively applying to the clutch a variable force so that the clutch can transmit a predetermined torque. This entails automatic selection of a minimum slip between a torque receiving and a torque transmitting part of the power train. Compensation, particularly long-range compensation, is carried out for the existence of possible differences between the predetermined and actual torques being transmitted by the clutch.

Method of and apparatus for transmitting torque in vehicular power trains

The rotary housing of a hydrokinetic torque converter, which can be utilized in the power train of a motor vehicle&mdash;for example, in conjunction with a continuously variable transmission&mdash;contains a torque monitoring device which is installed in such a way that it does not take up any, or any appreciable, additional space, especially in the axial direction of the housing. The torque monitoring device can serve to transmit torque between the lockup clutch and the output element of the torque converter. Additional features reside in the provision, configuration and manner of mounting of an auxiliary mass, and in the provision of a member for centering the piston of the lockup clutch in the housing as well as a member for centering the housing on the output element of a prime mover.

Hydrokinetic torque converter

A method of monitoring a torque transmission system with a manually switchable gearbox in the power train of a motor vehicle involves the utilization of at least one sensor unit at the input side of the torque transmission system to ascertain relevant positions of the shift lever of the gearbox and the driving torque of the engine of the motor vehicle. The thus obtained shift lever signals are memorized, together with comparison signals which are obtained as a result of filtering of the shift lever signals, and various characteristics of such signals are recognized and identified to indicate the intention of the operator of the vehicle regarding the switching of the gearbox. The thus obtained switching intention signals are transmitted to a controlled clutch operating system.

Method for regulating the transmission of torque in power trains

The invention relates to a hydrodynamic torque converter including a turbine wheel arranged inside of a housing, a torque converter lockup clutch, an axially mounted piston, a torsional vibration damper and a hub. The turbine wheel and the piston are rotationally fixed to the input component of the damper. The input component is connected to the hub by means of a connection provided with a circumferential backlash. The output component of the damper is connected to the hub without circumferential backlash.

Hydrodynamic torque converter

A hydrokinetic torque converter for use with a transmission in the power train of a motor vehicle has a housing rotatable by the engine and containing a pump, a turbine and at least one stator as well as a rotary output device connected to the input shaft of the transmission. The pump is normally rotatable by the housing; the turbine is rotatable (a) by the fluid which is circulated by the pump or (b) by the housing in response to engagement of a lockup clutch; and the stator can be connected to the stationary case of the transmission or is rotatable by the circulating fluid. First and second hubs are non-rotatably but axially movably mounted on the output member and are respectively connectable with the turbine and the stator by suitable clutches. The hubs can move axially relative to the output device between several positions in one of which the turbine can drive the input element of the transmission in a forward direction, in another of which the stator can rotate the input element in a direction to drive the vehicle rearwardly, and in a third of which the transmission is in neutral gear.

A torque-transmitting device is connected to a prime mover unit and a speed-changing transmission and includes a hydrodynamic torque-converter or fluid coupling with a pump wheel, a turbine wheel and in some cases a stator wheel. The torque-transmitting device has a disconnecting clutch to uncouple it from the prime mover unit.

Torque-transmitting device and method for starting a prime mover unit

Method and apparatus for regulating the transmission of torque in power

The rotary housing of a hydrokinetic torque converter, which can be utilized in the power train of a motor vehicle--for example, in conjunction with a continuously variable transmission--contains a torque monitoring device which is installed in such a way that it does not take up any, or any appreciable, additional space, especially in the axial direction of the housing. The torque monitoring device can serve to transmit torque between the lockup clutch and the output element of the torque converter. Additional features reside in the provision, configuration and manner of mounting of an auxiliary mass, and in the provision of a device for centering the piston of the lockup clutch in the housing as well as a device for centering the housing on the output element of a prime mover.

The bypass clutch in the fluid-containing housing of the hydrokinetic torque converter in the power train of a motor vehicle is provided with a first friction surface carried by a radially extending or conical section of the housing, and with a complementary friction surface carried by an axially movable piston or by an intermediate clutch plate of the bypass clutch. At least one of the friction surfaces is provided with an array of pockets and/or channels for a fluid (such as oil) which withdraws friction heat developing when the bypass clutch is partially engaged so that the friction surfaces contact but slip relative to each other. The depth and/or the width of the channels is at least substantially constant, and such channels can include bends between straight channel sections. The inlets of the channels can be located at the radially inner or radially outer marginal portion and their outlets can be located at the radially outer or inner marginal portion of the respective friction surface.

Hydrokinetic torque convertor with bypass clutch having grooved friction

Method of and apparatus for regulating the transmission of torque in

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Sinzheim, Germany

Uwe Wagner