Abstract: An expander circuit for a thermal expander, having a first pump arranged between a condenser and an evaporator, is proposed, the inlet of the expander being connected to the evaporator and the outlet to the condenser, and a separate lubricating circuit connecting the expander circuit to at least one bearing.

Abstract: A transfer case arrangement may include a first output shaft, a second output shaft, a clutch, a shutdown device, a lubrication device, and a control. The clutch may distribute a torque between the output shafts. The shutdown device may shut down the second output shaft when the clutch is disengaged. The lubrication device may lubricate the clutch and/or another component of the transfer case arrangement. The lubrication device may include an oil conveying device for conveying lubrication oil. The control may activate the oil conveying device periodically when the second output shaft is shut down.

Abstract: A clutch assembly with a rotatable clutch hub which is connected rotationally fixedly to several inner plates which may be brought into friction connection with outer plates of an associated clutch basket and form a plate pack. The clutch hub has at least one bore which allows a throughflow of a fluid from the interior of the clutch to the plates, and an oil conduction device attached to the clutch hub at the at least one bore.

Abstract: An adjustment device for adjusting the relative angular position of a camshaft with respect to a crankshaft within a specified angle range, the adjustment device having a device for emergency operation of the adjustment device. The device for emergency operation includes a freewheel device which can be activated in an emergency mode of the adjustment device and, in an activated state, is able to allow an adjustment movement of the camshaft with respect to the crankshaft from the current position in a first direction towards an emergency running position and to block an adjustment movement in a second direction opposite thereto.

Abstract: The invention relates to a method for the assembly of a balance shaft unit for use in motor vehicles. The assembly includes a housing having a bearing section, a rotating component and at least one rolling element bearing for the axially fixed journaling of the rotating component in the bearing section of the housing. The rolling element bearing has a first ring section associated with the rotating component and a second ring section associated with the bearing section. First, the rolling element bearing is axially fixedly installed on the rotating component or in the bearing section. Next, the rotating component is cooled and/or the housing part is heated. Finally, the rotating component is introduced into the bearing section and is held until a temperature compensation has taken place between the rotating component and the housing such that a shrink-fit connection is established.

Abstract: A distribution gear mechanism with a torque transmission device having a clutch, a fluid sump configured to receive a lubricating fluid, wherein a lower cog is configured to engage in the fluid sump such that the lubricating fluid is conveyed from the fluid sump in the direction of an upper cog by way of a chain drive, a fluid reservoir configured to collect the lubricating fluid and which is fluidically connected to the fluid sump, an adjustment mechanism configured to open and close an outlet opening of the fluid reservoir to the fluid sump, and an actuating mechanism configured to simultaneously activate the adjustment mechanism and the clutch.

Abstract: A stator for an electric machine having electrical windings surrounded by a casting compound, and fluid channels for cooling the electrical windings formed in the casting compound in close spatial proximity to the electrical windings.

Abstract: A torque transmission arrangement including a primary shaft, a friction clutch, a housing in which the primary shaft is rotatably supported by a roller element bearing including an inner ring and an outer ring. An actuator is disposed in the housing between the friction clutch and the roller element bearing for actuating the friction clutch. The actuator comprises a fixed support element, an adjusting element axially offset from the support element and displaceable for engaging the friction clutch, and an actuating mechanism designed for displacing the adjusting element relative to the support element in an axial adjusting direction away from the roller element bearing. The roller element bearing is designed as a tapered roller bearing, and the support element is operationally connected to the tapered roller bearing.

Abstract: The invention relates to a transmission for a motor vehicle having a rotatable transmission element arranged in a first section of the transmission; a store of liquid arranged in a second section of the transmission separate from the first section; a collection device for liquid thrown off by the transmission element having a return passage through which a first portion of the thrown off liquid can be returned to the first transmission section and an outlet to supply a second portion of the thrown off liquid back to the liquid store; and a passage for the liquid which connects the liquid store to the first transmission section and which has a temperature-controlled restrictor element functioning to inhibit the inflow of liquid from the liquid store into the first transmission section when a fluid temperature in the first transmission section falls below a temperature threshold value.

Abstract: An actuator has a drive element and an output element each rotateable about a rotation axis, and a coupling device which couples the drive element to the output element to form a torsion backlash.

Abstract: A clutch unit (47) comprises a wet friction clutch for controllable transmission of a torque from an input element (41) to an output element (45), housing that contains the friction clutch and oil for cooling the friction clutch, and an actuator (51) for actuating the friction clutch. The actuator is attached to the housing in a thermally conductive way and has a temperature sensor (108) for sensing a temperature of the actuator. In order to computationally determine the oil temperature (TÖl) in the clutch unit (47), a thermal input power to the clutch unit is determined as a function of at least a speed of the input element and/or of the output element. The difference between the thermal input power and the thermal output power is determined, and the oil temperature is determined as a function of the difference that was determined.

Abstract: The present invention relates to a transmission having a housing, having a first drive output shaft, having a second drive output shaft and having a clutch system for distributing a torque between the drive output shafts. At least two transmission components are operatively connected between the drive output shafts and generate lubricating oil pressure. A separate tube extends within the housing from the at least two transmission components to the clutch system in order to supply lubricating oil to the clutch system.

Abstract: A method for selectively coupling a motor to a drive train of a motor vehicle using a clutch having a first clutch part driven by the motor, a second clutch part associated with the drive train and an actuator, the method includes the steps of: accelerating the first clutch part while simultaneously activating the actuator during a first actuation phase without engaging the first and second clutch parts; suspending activation of the actuator until a predefined rotational speed difference is reached between the first and second clutch parts; and engaging the first and second clutch parts during a second actuation phase upon reaching the predefined speed difference.

Abstract: A method for controlling a clutch unit for a drive train of a motor vehicle wherein the temperature in the friction clutch is ascertained and a characteristic curve of the friction clutch is adapted as a function of the ascertained temperature.

Abstract: A torque transmission device for the transmission of torque between a first component and a second component which are mounted such that they can rotate about a common rotational axis. The torque transmission device includes a clutch configured to actuate in the axial direction and an actuation unit with a converter device and an actuating device. The converter device includes at least one axially movable first converter element and a second converter element assigned to the second component. The converter elements are configured such that relative rotation between the first and the second converter elements is converted into an axial movement of the first converter element to actuate the clutch. The actuating device is configured to generate selective coupling action between the first converter element and a structural element of the clutch.

Abstract: A solenoid valve for controlling a hydraulic system having a coil which is composed of an electrical conductor, an armature which is situated at least partially inside the coil and is connected to a valve element for opening and closing a flow opening of the solenoid valve, and a hydraulic fluid-filled valve chamber that accommodates the armature and communicates fluidically with the hydraulic system. The armature is supported in movable fashion in the hydraulic fluid of the hydraulic system. In order to reduce the viscosity of the hydraulic fluid, the coil is situated so that a heating of the coil produced by a current flow produces a heating of the hydraulic fluid in the valve chamber.

Abstract: The present invention relates to a multi-disc clutch for the transfer of torque between a first clutch part and a second clutch part, having at least one first and at least one second disc that engage on another and that are movable parallel to a rotational axis of the multi-disc clutch, and having a reset device for the receiprocal ventilation of adjacent discs. The first clutch part is connected in a rotationally secure fashion to the first disc and the second clutch part is connected in a rotationally secure fashion to the second disc. The reset device has at least two reset elements that are disposed eccentrically relative to the rotational axis and distributed in the circumferential direction.

Abstract: A drive system for a motor vehicle with a continuously driven primary axle and a selectably driven secondary axle has a differential that acts between the wheels of the secondary axle, and has a torque transmission device for transmitting a drive torque to the differential. The torque transmission device has a clutch and a pump, wherein the pump produces a hydraulic pressure in a first pressure chamber of the clutch when a speed difference occurs between the primary axle and the secondary axle. The first pressure chamber is connected via a connecting line to a second pressure chamber, which is associated with an actuating member of the differential, so that the pressure produced by the pump also permits an at least partial locking of the differential. The first pressure chamber is connected to a low-pressure chamber through a first discharge line, in which is arranged a first control valve.

Abstract: An actuator device configured to actuate a first functional unit and a second functional unit. The actuator device has an actuator motor configured to generate a rotational drive movement, a first shift device assigned to the first functional unit, a second shift device assigned to the second functional unit, and a shift drum which couples the actuator motor and the shift devices in terms of drive. The first shift device is coupled to the shift drum via a first positive control mechanism, and the second shift device is coupled to the shift drum via a second positive control mechanism. By the positive control mechanism, a rotational movement of the shift drum, which can be generated by the rotational drive movement, may be converted into a translatory movement of the first shift device and/or into a translatory movement of the second shift device.

Abstract: A mass balancing unit having a hollow balancing shaft, at least one balancing weight which is provided on the balancing shaft and at least one roller bearing which has an outer bearing ring and a plurality of roller members. A longitudinal portion of the balancing shaft forms an inner bearing ring, the roller members being received between the outer bearing ring and the longitudinal portion of the balancing shaft. Adjacent to the longitudinal portion, the balancing shaft has at least one recess in order to reduce the rigidity of the longitudinal portion of the balancing shaft in a radial direction.