Schaeffler Technologies Ag & Co .kg

Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Reinhard Stehr

Eric Müller

Marco Grethel

Manfred Homm

Roshan Willeke

Jochen Pfister

Michael Reuschel

Martin Vornehm

Christian Lauinger

Ronald Glas

Sebastian Köpfler

Bernhard Walter

Norbert Indlekofer

Franz Bitzer

Markus Baehr

Martin Staudinger

Andreas Triller

Dominik Herkommer

André Teubert

Eugen Kremer

Pierre Werny

Andreas Englisch

Andreas Götz

Christoph Vetter

Viktor Franz

Hanjo Nissen

Marco Treder

Alexander Glebov

Volker Edelmann

Ańdreas Englisch

Matthias Finsterbusch

Markus Ciesek

Laurent Ineichen

Alexander Gorbunov

A fluid system for a continuously variable transmission includes a first pump, a first actuation unit, a first line section, a second actuation unit, and a second line section. The first pump has a first sub-pump and a second sub-pump. The first actuation unit is assigned to a first disc set of the continuously variable transmission and the second actuation unit is assigned to a second disc set of the continuously variable transmission. The first line section fluidically connects the first pump to the first actuation unit and the second line section fluidically connects the first pump to the second actuation unit. The second sub-pump has a first connection that can be selectively fluidically connected to the first actuation unit via the first line section, or the second sub-pump has a second connection that can be selectively fluidically connected to the second actuation unit via the second line section.

Fluid system for a continuously variable transmission

A hydraulic system () for electro-hydraulically pressing and/or moving a first () and a second () set of disks of a CVT transmission () is provided. The hydraulic system () includes two electrically driven hydraulic pumps (). In order to reduce energy consumption during operation of the hydraulic system, the hydraulic pumps () are in the form of self-inhibiting hydraulic pumps () which, when a hydraulic pressure is applied and the associated electric drive is switched off, substantially maintain the applied hydraulic pressure as a result of a static friction and a residual moment of the associated electric drive.

Hydraulic system

The invention relates to a transmission for a drive train of a motor vehicle, having a shaft section, to which a torque measurement device, designed to measure a torque applied to the shaft section is attached, wherein an electronics unit connected to the torque measurement device is received radially within the shaft section. The invention further relates to a drive train for a motor vehicle, having a transmission.

Transmission having torque measurement device

A slide rail for a continuously variable transmission is disclosed that comprises at least one slide surface arranged for guiding a wrap-around mechanism that connects a first cone pulley pair to a second cone pulley pair of the continuously variable transmission to transfer torque therebetween. The slide rail includes at least one acceleration sensor arranged so that an acceleration of the slide rail perpendicular to the at least one slide surface can be detected by the acceleration sensor.

Slide rail for a wrap-around means of a continuously variable transmission and measurement method for determining a torque present at a cone pulley pair

A fluid assembly in a hydraulic circuit, comprising one or more reservoirs configured to store fluid. The fluid assembly also includes a pump configured to transport the fluid in the hydraulic circuit and actuate a load from a transmission of a motor vehicle, a pressure accumulator configured to collect pressure built up by the pump and actuate the load, and a valve system configured to allow fluid communication of the load with the pump.

Fluid arrangement

An actuator system for hydraulic actuation of a clutch comprises a master cylinder with a master piston, a readjustment container for containing hydraulic fluid, a connection opening between the readjustment container and the master cylinder, where a degree of openness of the connection opening is dependent on the position of the master piston, and a hydraulic actuator to control a position of the master piston. In an actuator system, a control device for controlling the hydrostatic actuator is also provided, such that a speed of motion of the master piston is high while the connection opening is wide open, and low while the connection opening is open a little. In a method according to the disclosure, a position of the master piston is detected, and the actuator is controlled at different speeds depending on the position or the degree of openness.

Actuator system for hydraulic actuation

A hydraulic arrangement by which a plurality of shift rails of a transmission are actuated, including one double acting cylinder per shift rail by which the respective shift rail can be moved back and forth. A first hydraulic valve is connected upstream of the plurality of shift rails and has a first output and a second output, by which a first shift pressure and a second shift pressure for actuating the shift rails can be provided. A second hydraulic valve is connected between the first hydraulic valve and two of the shift rails, and by which it is selectively possible for the first output of the first hydraulic valve to be associated with one of the double acting cylinders of the two shift rails, and the second output of the first hydraulic valve to be associated with the other double acting cylinder of the two shift rails.

Hydraulic arrangement for actuating a plurality of shift rails

A compressor drive system for driving a compressor of an internal combustion engine contains a variable speed drive unit and a planetary gear set, the planetary gear set being connected to the internal combustion engine and the compressor in such a way that a first output shaft of the planetary gear set is connected to the compressor, a first drive shaft of the planetary gear set is connected to the internal combustion engine, and a second drive shaft of the planetary gear set is connected to the internal combustion engine through the variable speed drive unit.

Compressor drive system with variable rotational speed

A hydraulic supply system for a hydraulically actuated automatic transmission, in particular for a belt-driven conical-pulley transmission. The system includes a primary pump driven by a primary drive system to provide pressure in a supply line connected to a regulating valve. The supply line is connected through a pilot valve to a control line in which a control valve is situated, with which the pressure that determines the setting of a transmission ratio adjusting valve is set. An auxiliary pump driven by an auxiliary drive system that is separate from the primary drive system includes an outlet line connected to the control line through a first valve that opens in the direction of the control line, and is connected to the supply line through a second valve that opens in the direction of the supply line.

Hydraulic supply system for a hydraulically actuated automatic transmission

A hydraulic system with a pressure reducing valve having at an inlet side a tank connection, a system pressure connection, and an outlet side working pressure connection that is connected to the system pressure connection or to the tank connection through the pressure reducing valve. The pressure reducing valve has a first and a second system pressure connection, wherein the second system pressure connection is pressurized at a significantly higher pressure than the first system pressure connection, and is connected to the working pressure connection through the pressure reducing valve.

Hydraulic system with a pressure reducing valve

A hydraulic system for actuating a belt-driven conical-pulley transmission having a variably adjustable transmission ratio, of a vehicle, including at least one hydraulic energy source and having a torque sensor that is supplied with working medium by a pump flow of the hydraulic energy source. A disconnection valve is connected between the hydraulic energy source and the torque sensor, which makes it possible to connect or disconnect an additional pump flow of the hydraulic energy source, depending on need.

A method for supplying fluid to a transmission component such as a transmission control unit, a transmission lubricating system, and/or a transmission cooling system. The transmission is an automatic transmission of a motor vehicle having a hydraulic actuating system. A hydraulic medium is drawn from a region within the interior of a transmission case by a positive displacement pump, and the region of the transmission case from which the positive displacement pump draws the hydraulic medium is subjected to an overpressure that is somewhat greater than the ambient pressure around the transmission case.

Method for supplying a fluid to a transmission component

A hydraulic system for an automatic transmission operatively connected to an internal combustion engine that is operable in a start-stop mode. The hydraulic system includes a hydraulic energy source to supply the hydraulic system with hydraulic energy, the hydraulic energy source including at least one electrically driven hydraulic pump to supply the hydraulic system with hydraulic energy during a stopping phase of the internal combustion engine. To achieve a reduction in fuel consumption and COemissions, provision is included to enable the electrically driven hydraulic pump to be switched on in addition to a mechanically driven hydraulic pump, as needed during an operating phase of the internal combustion engine.

Hydraulic system for an automatic transmission

The invention relates to a hydraulic system for actuating a continuously variable belt-driven conical-pulley transmission having two conical pulleys encircled by an endless torque-transmitting means, each of which comprises two conical disks, one of which is axially movable depending on the pressure in an associated pressing chamber, and having a torque sensor which includes a torque sensing chamber that is connected to a hydraulic energy source and is linked with the pressing chambers. The invention is distinguished by the fact that the pressing chambers are connected via a first hydraulic resistance element to the torque sensing chamber, and via a second hydraulic resistance element to an additional pressure chamber, in which a lower pressure prevails than in the pressing chambers and/or the torque sensing chamber.

A conical pulley assembly with integrated torque sensor. A torque-dependent force is transmitted through a transmitting component to a sensing piston whose position determines the pressure in a sensing chamber. The transmitting member is connected to the movable disk, and is formed in such a way that it transmits the torque-dependent force to the sensing piston in a manner that is dependent on the position of an axially movable disk of the conical pulley.

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Bühl, Germany

Reinhard Stehr