Abstract: A hydraulic arrangement for an agricultural or industrial utility vehicle includes a main hydraulic circuit, a main hydraulic pump, a charge pump, a lubricating hydraulic circuit, a gearbox lubricating hydraulic circuit, a shifting hydraulic circuit, and a gearbox pump. Hydraulic fluid can be fed to the main hydraulic circuit by the main hydraulic pump. Hydraulic fluid can be fed to the main hydraulic pump by the charge pump. At least a part of the hydraulic fluid delivered by the charge pump can be fed to the lubricating hydraulic circuit. Hydraulic fluid can be fed to the shifting hydraulic circuit by the gearbox pump. At least a portion of the hydraulic fluid delivered by the charge pump can be fed to the gearbox lubricating hydraulic circuit.

Abstract: A hydraulic arrangement for a vehicle transmission includes a hydraulic system path leading to a hydraulic system circuit with a system pressure, a hydraulic lubrication path leading to a hydraulic lubrication circuit with a lubrication pressure, and a branching point connected to an output side of the system and lubrication paths. A variable displacement pump or a pump combination includes at least two fixed displacement pumps hydraulically connected to an input side of the branching point, and a variable displacement pump or at least one fixed displacement pump are hydraulically connected to the output side of the branching point and integrated into the hydraulic system path.

Abstract: A transmission subassembly for a working vehicle includes an engageable front wheel drive, a transmission housing, a clutch module, and a hydraulic module. The hydraulic module is received between the clutch module and the transmission housing.

Abstract: A hydraulic arrangement for an agricultural or industrial utility vehicle includes a main hydraulic circuit, a main hydraulic pump, a charge pump, a lubricating hydraulic circuit, a gearbox lubricating hydraulic circuit, a shifting hydraulic circuit, and a gearbox pump. Hydraulic fluid can be fed to the main hydraulic circuit by the main hydraulic pump. Hydraulic fluid can be fed to the main hydraulic pump by the charge pump. At least a part of the hydraulic fluid delivered by the charge pump can be fed to the lubricating hydraulic circuit. Hydraulic fluid can be fed to the shifting hydraulic circuit by the gearbox pump. At least a portion of the hydraulic fluid delivered by the charge pump can be fed to the gearbox lubricating hydraulic circuit.

Abstract: A transmission subassembly for a working vehicle includes an engageable front wheel drive, a transmission housing, a clutch module, and a hydraulic module. The hydraulic module is received between the clutch module and the transmission housing.

Abstract: A hydraulic arrangement for a vehicle transmission includes a hydraulic system path leading to a hydraulic system circuit with a system pressure, a hydraulic lubrication path leading to a hydraulic lubrication circuit with a lubrication pressure, and a branching point connected to an output side of the system and lubrication paths. A variable displacement pump or a pump combination includes at least two fixed displacement pumps hydraulically connected to an input side of the branching point, and a variable displacement pump or at least one fixed displacement pump are hydraulically connected to the output side of the branching point and integrated into the hydraulic system path.

Abstract: A torsional vibration damper system includes a primary side and a secondary side coupled to the primary side by a damper fluid arrangement for rotation and for relative rotation with respect to one another. The damper fluid arrangement has a first damper fluid which transmits a torque between the primary side and the secondary side and a second damper fluid which is loaded when there is an increase in pressure in the first damper fluid. A rotary feedthrough supplies or removes first damper fluid to or from at least one displacement chamber of the damper fluid arrangement and a pressure fluid generation system for providing first damper fluid to be supplied to the damper fluid arrangement via the rotary feedthrough. The pressure fluid generation system comprises at least two pressure fluid pumps.

Abstract: A torsional vibration damper with a primary side and a secondary side, wherein rotation of the primary side relative to the secondary side causes displacement of hydraulic fluid from at least one displacement chamber and compression of pneumatic fluid in at least one compensating chamber. A first displacement chamber assembly includes a pair of axially opposed end walls bounding each displacement chamber in both axial directions and a circumferential wall bounding it in one radial direction, and a second displacement chamber assembly bounds it in the other radial direction. A sealing arrangement is provided between the end walls and the second displacement chamber assembly to produce an essentially fluid-tight closure of the at least one displacement chamber.

Abstract: A hydraulic actuating system for a shiftable clutch installed in a drive train of a motor vehicle between an internal combustion engine and a transmission, which comprises at least one pressure source to produce a fluid pressure; a slave cylinder operably connected to the pressure source by which a clutch-release element of the vehicle clutch becomes subjectable to an actuating force; and a hydraulic clutch control means. The pressure source is configurable to create a compact and low-cost actuating system such that the maximum fluid pressure which it can produce is lower than that necessary at the slave cylinder to actuate the motor vehicle clutch. In this way, a hydraulic pressure booster becomes provided which can increase the fluid pressure to the level required for the clutch actuation.

Abstract: A rotary lead-through includes a first rotary lead-through element having a first channel opening on a first boundary surface, and a second rotary lead-through element having a second channel opening on a second boundary surface which opposite from the first boundary surface and can rotate relative to the first boundary surface about an axis of rotation, the first and second channels being in fluid communication via a channel boundary space. A sealing arrangement acting between the first and second lead-through elements includes at least one sealing stage, each sealing stage including a first sealing element toward the boundary space and a second sealing element away from the boundary space, the first and second sealing elements enclosing a backpressure chamber surrounding the axis of rotation. Where successive sealing stages are provided, a pressure-limiting valve can be provided in parallel to the seal separating immediately successive backpressure spaces.

Abstract: A drive train for a motor vehicle includes a coupling device between a drive unit and a transmission for torque or moment transfer between the drive unit and the transmission. The coupling device has at least one coupling arrangement that can be activated by a pressure medium. The transmission can be activated through the use of a pressure medium by way of a dedicated actuator whereby, on the basis of a shared pump arrangement that is or can be driven by the drive unit, (i) the pressure medium can be provided for activation of the coupling arrangement, (ii) the operating medium can be conducted to the coupling device for the purpose of operating under the influence of the operating medium, and (iii) the pressure medium can be provided for activation of the transmission. The pump arrangement includes at least one pump, which can be controlled or adjusted with regard to output pressure and/or with regard to output flow rate.

Abstract: An electromotive drive module for installation in a housing between an internal combustion engine and a transmission of a motor vehicle power train. The drive module includes an electric machine with a stator and a rotor and first and second clutch devices, by means of which the rotor can be connected when desired to the internal combustion engine and/or to the transmission for the transmission of torque.

Abstract: A clutch system includes a clutch arrangement between a drive unit and a transmission, a pump arrangement which supplies pressure medium to the clutch arrangement at a pressure and rate of flow, and an operating medium supply arrangement which supplies an operating medium to the clutch arrangement at a pressure which is less than the pressure of the pressure medium and a rate of flow which is greater than the rate of flow of the pressure medium. The operating medium supply arrangement includes a pressure receiving element which is movable in a housing and has at least one pressure receiving surface which is exposed to the pressure medium, and an interaction element which is coupled to move with the pressure receiving element and has at least one interaction surface which interacts with the operating medium to produce a flow of the operating medium.

Abstract: A clutch system includes a clutch device for positioning in a drive train between a drive unit and a transmission, and an actuating unit for hydraulically actuating the clutch device by means of at least one hydraulic slave-cylinder. The actuating unit has a hydraulic-medium delivery device for delivering a pressurized hydraulic medium, and a valve assembly, whose mediation allows the hydraulic medium to be supplied to and discharged from the slave-cylinder. The valve assembly comprises at least one supply valve, located in a hydraulic connection, between the hydraulic-medium delivery device and the slave-cylinder and at least one discharge valve, which is separate from the supply valve and located in a hydraulic connection, between the slave-cylinder and a hydraulic-medium reservoir.

Abstract: The invention concerns a drive train for a motor vehicle, which includes a coupling device (202) between a drive unit (232) and a transmission for moment transfer between the drive unit and the transmission, whereby the coupling device shows at least one coupling arrangement (204, 206) that can be activated by means of a pressure medium, for operation under the influence of an operating medium, and the transmission can be activated through the use of a pressure medium by means of a dedicated actuator (234), whereby, on the basis of a shared pump arrangement (209) that is or can be driven by the drive unit, i) the pressure medium can be provided for activation of the coupling arrangement, and ii) the operating medium can be conducted to the coupling device for the purpose of operating under the influence of the operating medium, and iii) the pressure medium can be provided for activation of the transmission, and whereby the pump arrangement includes at least one pump (209), which can be controlled or adjusted

Abstract: A clutch system includes a clutch device with at least one clutch arrangement for installation in a motor vehicle drive train between a drive unit and a transmission. The at least one clutch arrangement is actuated by a slave cylinder using a pressure medium which is supplied to the clutch device by a first pump. A further medium is also supplied to the clutch device by a second pump arrangement as an operating medium used during operation of the clutch device. The further medium is selectively supplied as a pressure medium to the slave cylinder.

Abstract: The invention relates to a clutch system, comprising at least one clutch device, especially for arrangement in a drive train, between a drive unit and a transmission. Said clutch device (202) can be actuated through the conveying of a pressure medium and/or is able to operate under the influence of an operating medium. One aspect of the invention provides that a secondary medium that acts as the pressure medium for actuating or as the operating medium for operating the clutch arrangement is supplied by a pump arrangement (208) which supplies a primary medium and a secondary medium supply device (220) which is connected to the pump arrangement or a secondary pump arrangement (220).

Abstract: The invention relates to a clutch system, comprising a clutch device, in particular for positioning in a drive train between a drive unit and a transmission and comprising an actuating unit (200) for hydraulically actuating the clutch device by means of at least one hydraulic slave-cylinder (202). Said actuating unit has a hydraulic-medium delivery device (210, 212) for delivering a pressurised hydraulic medium and a valve assembly (208, 216), whose mediation allows the hydraulic medium to be supplied to and discharged from the slave-cylinder. According to the invention, the valve assembly comprises at least one supply valve (208), located in a hydraulic connection, between the hydraulic-medium delivery device (210) and the slave-cylinder (202) and at least one discharge valve (216), which is separate from the supply valve and located in a hydraulic connection, between the slave-cylinder (202) and a hydraulic-medium reservoir (218).

Abstract: A clutch system includes a clutch device with at least one clutch arrangement for installation in a motor vehicle drive train between a drive unit and a transmission. The at least one clutch arrangement is actuated by a slave cylinder using a pressure medium which is supplied to the clutch device by a first pump. A further medium is also supplied to the clutch device by a second pump arrangement as an operating medium used during operation of the clutch device. The further medium is selectively supplied as a pressure medium to the slave cylinder.