Abstract: A method for actuating a parking lock device having a locking element that can be moved depending on an actuation position of an actuation element in order to set a parking position of a vehicle. A hydraulic device includes a first valve, which can be switched at least between a first valve state and a second valve state in order to change the actuation position via a system pressure. The valve state of the first valve is checked by first initiating a switch between the first and second valve state in a switching step, and then a detection step is carried out in which the system pressure is increased in a pressure increase step, and in an ascertaining step a movement of the actuation element is detected and the valve state of the first valve after the switching step is inferred on the basis of the detected movement.

Abstract: The hydraulic system (1) presented here advantageously makes it possible for the sump to be designed merely in the form of a dry sump (5) which does not contain a separate pump module with a dedicated drive motor for delivering the hydraulic medium. Rather, hydraulic medium is delivered from the dry sump (5) via the dry sump pump flow (7) into a high sump (3), which is located above the dry sump (5). It is thus possible for the dry sump (5) to be made much smaller than a conventional gearbox sump or an oil pan. At the same time, it is possible to avoid the situation where the presence of a pump module in the gearbox sump means that, rather than the level of hydraulic medium being able to be kept beneath all the rotating components, components rotate in the hydraulic medium. In comparison with known systems, the design of the hydraulic system (1) proposed here therefore avoids churning losses.

Abstract: Actuation of a hydraulic device that provides a hydraulic supply to a torque-transmitting device is provided. An electrically operated pump is operated in a first operating state. The first operating state has a primary pump rotational speed that provides a first fluid pressure to the torque-transmitting device via a fluid tract. A switchover process is initiated to operate the electrically operated pump device in a second operating state based on a second fluid pressure and a second fluid target pressure. The second operating state has a secondary pump rotational speed that provides the second fluid pressure to the torque-transmitting device via the fluid tract. During operation of the hydraulic device, the secondary pump rotational speed for the switchover process is determined based on a first power value. The first power value includes electrical pump power of the pump device in a preceding switchover process.

Abstract: The hydraulic system (1) presented here advantageously makes it possible for the sump to be designed merely in the form of a dry sump (5) which does not contain a separate pump module with a dedicated drive motor for delivering the hydraulic medium. Rather, hydraulic medium is delivered from the dry sump (5) via the dry sump pump flow (7) into a high sump (3), which is located above the dry sump (5). It is thus possible for the dry sump (5) to be made much smaller than a conventional gearbox sump or an oil pan. At the same time, it is possible to avoid the situation where the presence of a pump module in the gearbox sump means that, rather than the level of hydraulic medium being able to be kept beneath all the rotating components, components rotate in the hydraulic medium. In comparison with known systems, the design of the hydraulic system (1) proposed here therefore avoids churning losses.

Abstract: A hydraulic arrangement for an electrically operable, multigear axle drive train of a motor vehicle comprises a hydraulic circuit in which a hydraulic fluid is guided, a hydraulic pump arranged to apply pressure to the hydraulic fluid within the hydraulic circuit, a first hydraulic path arranged to connect a first clutch device to the hydraulic circuit, and a second hydraulic path arranged to connect a second clutch device to the hydraulic circuit. The first and second clutch devices are each arranged to actuate a gear selection device of the electrically operable axle drive train.

Abstract: A hydraulic system, in particular a hydraulic transmission controller, includes a first pump, which provides a large volumetric flow for a cooling and/or lubricating device at an outlet, and a second pump, which provides a high pressure for at least one hydraulic load at an outlet. The hydraulic system also includes an additional active valve, which is connected upstream of the cooling and/or lubricating device, is connected to a system pressure valve and to at least one hydraulic load to be boosted in such a manner that in a boost state, the outlets of the two pumps are connected to the hydraulic load to be boosted via a boost line.

Abstract: A hydraulic arrangement for an electrically operable, multigear axle drive train of a motor vehicle comprising a hydraulic circuit in which a hydraulic fluid is guided, a hydraulic pump arranged to apply pressure to the hydraulic fluid within the hydraulic circuit, a first hydraulic path arranged to connect a first clutch device to the hydraulic circuit, and a second hydraulic path arranged to connect a second clutch device to the hydraulic circuit. The first and second clutch devices are each arranged to actuate a gear selection device of the electrically operable axle drive train.

Abstract: A drive unit and a drive arrangement having the drive unit are provided. The drive unit includes a first electric machine and a second electric machine and an output shaft. A rotor of the second electric machine is connected to the output shaft for conjoint rotation and the drive unit has a separating clutch by which a rotor of the first electric machine is connected to the output shaft for torque transmission. The drive unit furthermore has a first flow system for implementing a flow of a first liquid for at least partial cooling of at least one electric machine and a second flow system for implementing a flow of a second liquid, the first flow system and the second flow system being arranged such that heat from the first liquid in the first flow system is transferred to the second liquid in the second flow system.

Abstract: A method for controlling a friction clutch actuated by an actuation system using an actuation pressure ambiguously applied along an actuation path includes providing the friction clutch and the actuation system, detecting a time curve of an actuation processes of the friction clutch, and comparing the time curve with the actuation pressure to ascertain an unambiguous friction clutch actuation path. The method may also include using the time curve to determine whether the friction clutch is in an opening state or a closing state and whether the actuation pressure is applied to an opened friction clutch actuation path or a closed friction clutch actuation path, and starting from a set actuation pressure, carrying out a directional control of the friction clutch by specifying the actuation pressure.

Abstract: A hydraulic system, in particular a hydraulic transmission controller, includes a first pump, which provides a large volumetric flow for a cooling and/or lubricating device at an outlet, and a second pump, which provides a high pressure for at least one hydraulic load at an outlet. The hydraulic system also includes an additional active valve, which is connected upstream of the cooling and/or lubricating device, is connected to a system pressure valve and to at least one hydraulic load to be boosted in such a manner that in a boost state, the outlets of the two pumps are connected to the hydraulic load to be boosted via a boost line.

Abstract: Actuation of a hydraulic device that provides a hydraulic supply to a torque-transmitting device is provided. An electrically operated pump is operated in a first operating state. The first operating state; has a primary pump rotational speed that provides a first fluid pressure to the torque-transmitting device via a fluid tract. A switchover process is initiated to operate the electrically operated pump device in a second operating state based on a second fluid pressure and a second fluid target pressure. The second operating state has a secondary pump rotational speed that provides the second fluid pressure to the torque-transmitting device via the fluid tract. During operation of the hydraulic device, the secondary pump rotational speed for the switchover process is determined based on a first power value. The first power value includes electrical pump power of the pump device in a preceding switchover process.

Abstract: A pump unit includes an electric motor and a pump with a duct. The pump is rotationally driven by the electric motor to provide a setpoint volumetric flow to the duct. A rotational speed controller is configured to, during operation of the pump, determine a setpoint rotational speed based on a fixed-point iteration of an initial rotational speed. The setpoint rotational speed is associated with a setpoint volumetric flow. The rotational speed controller is further configured to operate the pump at the setpoint rotational speed.

Abstract: A method for controlling a friction clutch actuated by an actuation system using an actuation pressure ambiguously applied along an actuation path includes providing the friction clutch and the actuation system, detecting a time curve of an actuation processes of the friction clutch, and comparing the time curve with the actuation pressure to ascertain an unambiguous friction clutch actuation path. The method may also include using the time curve to determine whether the friction clutch is in an opening state or a closing state and whether the actuation pressure is applied to an opened friction clutch actuation path or a closed friction clutch actuation path, and starting from a set actuation pressure, carrying out a directional control of the friction clutch by specifying the actuation pressure.

Abstract: A clutch unit for a powertrain of a motor vehicle is disclosed, comprising a torque input component acting as a drive element, a torque output component acting as an output element, being connectable so as to transmit a torque to the torque input component via a clutch that can be shifted using friction elements, and with a torsional vibration damper having two masses damped relative to one another to reduce rotational irregularities, which is arranged between the torque input component and the torque output component, at least one of the two masses of the torsional vibration damper being simultaneously designed as a support for a friction partner. The disclosure further relates to a hybrid module comprising a first drive machine, the output shaft of which can be connected to an output shaft of a second drive machine or a transmission input shaft via such a clutch unit.

Abstract: A clutch unit for a powertrain of a motor vehicle is disclosed, comprising a torque input component acting as a drive element and a torque output component acting as an output element, which can be connected to transmit a torque to the torque input component through a clutch which can be switched through friction elements, the clutch having two partial clutches by which the torque input component and the torque output component can be connected so as to transmit a torque, in which one of the two partial clutches is configured as a positive-fit clutch and the other of the two partial clutches is configured as a friction clutch. In addition, the disclosure relates to a hybrid module with a first drive machine the output shaft of which can be connected through such a clutch unit to an output shaft of a second drive machine or a transmission input shaft.

Abstract: A drive unit and a drive arrangement having the drive unit are provided. The drive unit includes a first electric machine and a second electric machine and an output shaft. A rotor of the second electric machine is connected to the output shaft for conjoint rotation and the drive unit has a separating clutch by which a rotor of the first electric machine is connected to the output shaft for torque transmission. The drive unit furthermore has a first flow system for implementing a flow of a first liquid for at least partial cooling of at least one electric machine and a second flow system for implementing a flow of a second liquid, the first flow system and the second flow system being arranged such that heat from the first liquid in the first flow system is transferred to the second liquid in the second flow system.

Abstract: A coolant delivery module for delivering and distributing a coolant includes a housing, a pump, a distribution valve, an electric motor, and an electronic control unit. The housing is equipped with an intake line connection and a plurality of consumer connections. The pump is arranged in the housing and includes a pump inlet connected to the intake line connection, and a pump outlet. The distribution valve is arranged in the housing, connected to the pump outlet, and arranged to selectively connect the pump outlet to the consumer connections. The electric motor is arranged in the housing for driving the pump in a delivery state. The electronic control unit is arranged in the housing, arranged to exert a controlling action on the electric motor, and operatively connected to the distribution valve to control the distribution valve during operation.

Abstract: A clutch unit for a powertrain of a motor vehicle is disclosed comprising a torque input component acting as a drive element, a torque output component acting as an output element, being connectable so as to transmit a torque to the torque input component via a clutch that can be shifted using friction elements, and with a torsional vibration damper having two masses damped relative to one another to reduce rotational irregularities, which is arranged between the torque input component and the torque output component, at least one of the two masses of the torsional vibration damper being simultaneously designed as a support for a friction partner. The disclosure further relates to a hybrid module comprising a first drive machine, the output shaft of which can be connected to an output shaft of a second drive machine or a transmission input shaft via such a clutch unit.

Abstract: A clutch unit for a powertrain of a motor vehicle is disclosed, comprising a torque input component acting as a drive element and a torque output component acting as an output element, which can be connected to transmit a torque to the torque input component through a clutch which can be switched through friction elements, the clutch having two partial clutches by which the torque input component and the torque output component can be connected so as to transmit a torque, in which one of the two partial clutches is configured as a positive-fit clutch and the other of the two partial clutches is configured as a friction clutch. In addition, the disclosure relates to a hybrid module with a first drive machine the output shaft of which can be connected through such a clutch unit to an output shaft of a second drive machine or a transmission input shaft.