Abstract: A drive device for a motor vehicle includes an electric machine having a gearbox where the motor vehicle is drivable electrically via the gearbox by the electric machine. At least one gear of the gearbox is switchable by operating a switch element. A medium is flowable through a circuit that has a first branch through which the medium is flowable to cool and/or lubricate the electric machine and/or the gearbox and a second branch through which the medium is flowable to operate the switch element. A pump delivers the medium through the circuit. The medium is flowable through a third branch of the circuit to operate the parking lock.

Abstract: An automatic gearbox for a motor vehicle includes a lubricating or cooling device, a hydraulic pump having a first pump connection via which, in a forward operation of the hydraulic pump, the lubricating or cooling device can be supplied with a hydraulic fluid conveyed by the hydraulic pump during forward operation and thus flows through the first pump connection, and with a parking lock, which can be moved between an engaged state and a disengaged state and has a first operating space, into which the hydraulic fluid conveyed by the hydraulic pump during forward operation can be introduced so that the parking lock is hydraulically operable and an adjustment of the parking lock from one of the states into the other state can thereby be effected.

Abstract: A hydraulic controller for an automatic transmission of a motor vehicle includes at least one gear shift piston-cylinder unit having a gear shift piston for actuating a shifting element in the form of a multi-plate clutch, and a gear shift pressure chamber in which an actuating pressure may be built up by supplying operating fluid. The gear shift piston-cylinder unit has a centrifugal oil chamber that is separated from the gear shift pressure chamber by a gear shift piston. Operating fluid may be supplied to the centrifugal oil chamber via a centrifugal oil line supplied by a first supply line. The hydraulic controller has a second supply line for supplying operating fluid to the centrifugal oil line. The second supply line may be closed and opened by a centrifugal oil valve.

Abstract: In a hydraulic control arrangement for an automatic transmission of a motor vehicle having a parking lock activation system wherein operating fluid is supplied via a parking lock slide valve to a first parking lock pressure chamber for moving a parking lock-up piston in one direction into a locking position or moving the parking lock piston in an opposite direction, whereby operating fluid is released from the first parking lock pressure chamber via a discharge slide valve by way of which the first parking brake pressure chamber is connected to a tank for releasing the parking lock-up.

Abstract: In a drive train device, in particular a motor vehicle drive train device, with a working fluid pressure system for providing an operating fluid pressure including at least a first and a second operating fluid pressure source connected in at least one operating state directly to the working fluid pressure system, and a lubricating and cooling fluid pressure system with an operating fluid pressure deviating from the operating fluid pressure in the working fluid pressure system, a hydraulic switching unit is provided which in at least one operating state connects the second operating fluid pressure source directly to the lubricating and cooling fluid pressure system for increasing the pressure thereof.

Abstract: A hydraulic controller for an automatic transmission of a motor vehicle includes at least one gear shift piston-cylinder unit having a gear shift piston for actuating a shifting element in the form of a multi-plate clutch, and a gear shift pressure chamber in which an actuating pressure may be built up by supplying operating fluid. The gear shift piston-cylinder unit has a centrifugal oil chamber that is separated from the gear shift pressure chamber by a gear shift piston. Operating fluid may be supplied to the centrifugal oil chamber via a centrifugal oil line supplied by a first supply line. The hydraulic controller has a second supply line for supplying operating fluid to the centrifugal oil line. The second supply line may be closed and opened by a centrifugal oil valve.

Abstract: In a hydraulic control arrangement for an automatic transmission of a motor vehicle having a parking lock activation system wherein operating fluid is supplied via a parking lock slide valve to a first parking lock pressure chamber for moving a parking lock-up piston in one direction into a locking position or moving the parking lock piston in an opposite direction, whereby operating fluid is released from the first parking lock pressure chamber via a discharge slide valve by way of which the first parking brake pressure chamber is connected to a tank for releasing the parking lock-up.

Abstract: In a drive train device, in particular a motor vehicle drive train device, with a working fluid pressure system for providing an operating fluid pressure including at least a first and a second operating fluid pressure source connected in at least one operating state directly to the working fluid pressure system, and a lubricating and cooling fluid pressure system with an operating fluid pressure deviating from the operating fluid pressure in the working fluid pressure system, a hydraulic switching unit is provided which in at least one operating state connects the second operating fluid pressure source directly to the lubricating and cooling fluid pressure system for increasing the pressure thereof.

Abstract: The invention proceeds from a changeover valve, in particular for an automatic transmission of a motor vehicle, having at least one closing means (11) which is arranged in a housing part (10) and which, in order to control a flow, can be guided into at least two valve seats (16, 17) and is arranged in a control duct (20) which is open exclusively toward a connection side (15) of the housing part (10). It is proposed that in a switched-off state, considered in an operating configuration, the closing means (11) adopts a defined initial control position (18).

Abstract: The invention relates to a control plate of an automatic gearbox, which plate comprises two housing parts and a steel sealing plate clamped in between in a sealing manner by means of screws. In order to keep the manufacturing spread of the tightening torque of these screws small, the screws are tightened until beyond their RP 0.2 limit in a manner controlled by the angle of rotation.