Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Schaeffler Technologies Ag & Co .kg

Eric Müller

Reinhard Stehr

Manfred Homm

Roshan Willeke

Marco Grethel

Jochen Pfister

Michael Reuschel

Martin Vornehm

Martin Staudinger

Christian Lauinger

Ronald Glas

Norbert Indlekofer

Christoph Vetter

Hanjo Nissen

Oswald Friedmann

Bernhard Walter

Franz Bitzer

Hartmut Faust

Andreas Triller

André Teubert

Eugen Kremer

Andreas Englisch

Felix Dreher

Klaus Scheufele

Laurent Ineichen

Franz Benz

Werner Gruca

Volker Edelmann

Ańdreas Englisch

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 volume flow regulating valve for a hydraulic system for controlling a belt-driven conical-pulley transmission. The valve includes a control piston with a pressure surface and an oppositely facing pressure return surface. A supply segment is associated with the pressure surface, and a cooler return segment is connectable with the supply segment by a control edge of the control piston. A pressure return segment is associated with the pressure return surface, and a pressurizing segment is situated between the cooler return segment and the pressure return segment.

Volume flow regulating valve for a hydraulic system for controlling a belt-driven conical-pulley transmission

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 supply system for a hydraulically-operated automatic transmission includes a primary pump that is driven by an internal combustion engine of a vehicle. An electrically-driven auxiliary pump is provided to supply the system with hydraulic pressure when the primary pump is off or to supplement the primary pump when the primary pump does not deliver sufficient pressure. A discharge line from the auxiliary pump is connected to a control line of the hydraulic supply system and to the hydraulic system supply line under system pressure. Check valves are provided in the respective lines from the auxiliary pump. An additional check valve is provided in a line that extends from the control line to a torque sensing chamber of the automatic transmission.

Hydraulic supply system for a hydraulically-actuated automatic transmission

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.

Hydraulic system

A hydraulic system for controlling a belt-driven conical-pulley transmission. A pump draws a working medium from a working medium tank or through a cooler return valve from a cooler return line. The cooler return valve is a minimum pressure valve that holds closed a connection between the cooler return line and a pump inlet line through the cooler return valve, as long as the pressure in the cooler return line remains below a specified minimum pressure. The cooler return valve also opens the connection between the cooler return line and the pump inlet line through the cooler return valve as soon as the specified minimum pressure in the cooler return line is exceeded.

Hydraulic system for controlling a belt-driven conical-pulley transmission

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.

Conical pulley with integrated torque sensor for a belt-driven conical-pulley transmission

A hydraulic system for actuating a clutch and/or a variable speed drive unit of a belt-driven conical-pulley transmission of a vehicle, such as a commercial vehicle, and having a variable transmission ratio and a torque sensor. The hydraulic system includes at least one hydraulic energy source. A selector and check valve is provided for supplying additional components besides the torque sensor and is connected between the hydraulic energy source, the additional components, and the torque sensor in such a way that the torque sensor includes priority in being supplied with hydraulic medium.

A hydraulic system including a multi-flow hydraulic pressure supply unit, especially a dual-flow hydraulic pressure supply unit, such as a pump, by which a volumetric flow of pressurized fluid is supplied to a hydraulic-fluid-operated device. A valve arrangement is provided either for switching between the individual pump flows or for interconnecting the individual pump flows.

Hydraulic system and automatic gearbox

A hydraulic system including a pump for feeding hydraulic fluid from an inlet side to an outlet side. A pressure accumulator is disposed at the outlet side, and between the pump and the pressure accumulator a hydraulic control valve is disposed, which has at least two valve positions. The outlet side of the pump is connected to the pressure accumulator in a second valve position, and is separated from the pressure accumulator in a first valve position. The outlet side of the pump is connected to the inlet side through the control valve in the first valve position.

A positive-displacement pump having an eccentrically positioned internal ring gear and pinion within a pump housing. Pressurized operating fluid is provided by the pump to actuate an actuation piston of a clutch unit, such as a double clutch unit. The clutch unit is drivingly coupled with the pump for movement between engaged and disengaged positions. At least one throughbore is provided in the pump housing within which throughbore the clutch actuation piston is guided.

Gear pump for actuating a clutch

A hydraulic system having at least one hydraulic valve for actuating a component, wherein a control pressure acting on the hydraulic valve can be activated through a supply pressure of a pilot circuit having at least one actuator. At least one pressure reduction apparatus is connected in series with the actuator.

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Kaiserslautern, Germany

Eric Müller