Abstract: A method for determining a conveying capacity of a hydraulic pump includes opening a blockable flow cross-section in order to connect a pressure side of the hydraulic pump to an area of the hydraulic system through the flow cross-section after operating the hydraulic pump driven at a defined rotational speed. The flow cross-section is configured with the hydraulic pump such that an entire conveying volume flow provided by the hydraulic pump is guided through the flow cross-section when the flow cross-section is open. The method further includes comparing a change to an operating state of the transmission resulting from opening of the flow cross-section to a reference change to the operating state and determining the conveying capacity of the hydraulic pump as a function of a deviation between the change to the operating state and the reference change to the operating state.

Abstract: A torsional vibration damping arrangement for a drivetrain of a vehicle includes a rotational mass arrangement which is rotatable around a rotational axis. The rotational mass arrangement includes a primary inertia element which is rotatable around rotational axis A and a secondary inertia element which is rotatable relative to the primary inertia element against the action of an energy storage and further includes a displacer unit with a working chamber. The displacer unit is operatively connected to the primary inertia element or to the secondary inertia element on one side and to a damper mass on the other side.

Abstract: A method for controlling a hydraulic fluid supply system of an automatic transmission of a motor vehicle includes supplying the hydraulic fluid supply system with hydraulic fluid from at least one of a hydraulic pump controlled on an engine side and a hydraulic pump controlled on a gear set side. The method also includes controlling a cooling valve of the hydraulic fluid supply system as a function of detected motor vehicle parameters in order to set an adjusted power distribution with the hydraulic pump controlled on the engine side and the hydraulic pump controlled on the gear set side.

Abstract: A method for operating a transmission (3) with a hydraulic system comprising a variable capacity hydraulic pump, the method comprising determining during operation, a current hydraulic fluid volume requirement for actuating the transmission (3) and for temperature controlling and lubricating components of the transmission (3); setting the delivery volume of the hydraulic pump in a manner dependent on the currently determined hydraulic fluid volume requirement of the transmission (3), the delivery volume of the hydraulic pump, provided for temperature controlling and lubricating the components, being guided at least partially through a heat exchanger; wherein the delivery volume of the hydraulic pump is varied in a manner dependent on a temperature of the hydraulic fluid to an extent which sets that part of the delivery volume flow of the hydraulic pump which is to be guided via the heat exchanger.

Abstract: A method for operating a dual-clutch transmission with two clutches. During realization of a ratio, a first clutch is closed and a second clutch is open. During a ratio change, the first clutch is opened and the second clutch is closed. During a ratio change within short operating times, a target actuating pressure of the clutch for engagement is set to a fast-charging pressure level and subsequently adjusted to a closing pressure level, while a target actuating pressure of the clutch for disengagement is adjusted to an opening pressure level before setting the closing pressure level of the clutch for engagement. At least during a ratio change, an actual actuating pressure of the clutch for engagement is monitored and the target actuating pressure of the clutch for disengagement is adjusted to the opening pressure level if the actual actuating pressure of the clutch for engagement exceeds a pressure threshold.

Abstract: A method for controlling a hydraulic fluid supply system of an automatic transmission of a motor vehicle includes supplying the hydraulic fluid supply system with hydraulic fluid from at least one of a hydraulic pump controlled on an engine side and a hydraulic pump controlled on a gear set side. The method also includes controlling a retaining valve of the hydraulic fluid supply system as a function of detected motor vehicle parameters in order to set an adjusted power distribution with the hydraulic pump controlled on the engine side and the hydraulic pump controlled on the gear set side.

Abstract: A method for determining a conveying capacity of a hydraulic pump includes opening a blockable flow cross-section in order to connect a pressure side of the hydraulic pump to an area of the hydraulic system through the flow cross-section after operating the hydraulic pump driven at a defined rotational speed. The flow cross-section is configured with the hydraulic pump such that an entire conveying volume flow provided by the hydraulic pump is guided through the flow cross-section when the flow cross-section is open. The method further includes comparing a change to an operating state of the transmission resulting from opening of the flow cross-section to a reference change to the operating state and determining the conveying capacity of the hydraulic pump as a function of a deviation between the change to the operating state and the reference change to the operating state.

Abstract: A method for controlling a hydraulic fluid supply system of an automatic transmission of a motor vehicle includes supplying the hydraulic fluid supply system with hydraulic fluid from at least one of a hydraulic pump controlled on an engine side and a hydraulic pump controlled on a gear set side. The method also includes controlling a cooling valve of the hydraulic fluid supply system as a function of detected motor vehicle parameters in order to set an adjusted power distribution with the hydraulic pump controlled on the engine side and the hydraulic pump controlled on the gear set side.

Abstract: A method for controlling a hydraulic fluid supply system of an automatic transmission of a motor vehicle includes supplying the hydraulic fluid supply system with hydraulic fluid from at least one of a hydraulic pump controlled on an engine side and a hydraulic pump controlled on a gear set side. The method also includes controlling a retaining valve of the hydraulic fluid supply system as a function of detected motor vehicle parameters in order to set an adjusted power distribution with the hydraulic pump controlled on the engine side and the hydraulic pump controlled on the gear set side.

Abstract: A hydraulic system (1) of a transmission (2) with a multiple number of pressure control valves (62 to 29) is described, in the area of which an applied pressure (p_sys) can be adjusted to a pressure level to be set downstream as a function of a total force component acting on a valve slide depending on the operating state. The total force component is adjusted as a function of a pilot force component that can be applied to the valve slide, an actuating force component and a control force component that exists as a function of the pressure level prevailing downstream.

Abstract: A method of operating a clutch serving as a shift element and/or starting clutch of a drive train. During engagement, the clutch will be filled by a fast filling up to a defined minimum pressure. The fast filling is at least subdivided into two phases comprising a basic filling phase and an extension and/or a cutout phase. At the end of the basic filling phase, the actual clutch pressure is measured, and then, when the actual clutch pressure is equal to or larger than the minimum pressure, the extension and/or cutout phase is activated immediately following the basic filling phase. When the actual clutch pressure is lower than the minimum pressure, activation of the extension and/or the cutout phase is at least delayed by a pressure holding phase and, if necessary, by a pressure surplus phase.

Abstract: A method of adapting the rapid filling time of a clutch. During adaptation, the clutch is filled by at least two successive rapid filling pulses with increasing rapid filling times. For each rapid filling pulse a reaction, resulting from the filling pulse, is monitored. If a defined reaction, for one of the rapid filling pulses, is recognized for the first time whereas for the, or for each of the previous rapid filling pulse(s) the defined reaction was not observed, then as a function of the rapid filling time of that rapid filling pulse for which the defined reaction was recognized for the first time, carrying out the adaptation of the rapid filling time and, for each rapid filling pulse used for the adaptation, gradients of the clutch pressure produced as a result of the respective rapid filling pulse are evaluated to determine the defined reaction pressure.

Abstract: A method for determination of the synchronization point of an automatic double clutch transmission comprising two component transmissions each with one input shaft that connects via a friction clutch to the drive shaft of a motor and several gears, each shifted via a friction-synchronized gear clutch. The method includes the steps of selecting the gear clutch of a gear of a momentarily load-free component transmission; moving the associated gear setter to the neutral position as needed; successive movement of the associated gear setter in the direction of the shifting position of the selected gear until synchronous running is attained on the gear clutch within an applicable threshold; determination of the current synchronization point of the gear clutch from the current adjustment parameter of the associated gear setter; and adaptation of the valid synchronization point of the gear clutch to the current synchronization point.

Abstract: A method of operating a clutch serving as a shift element and/or starting clutch of a drive train. During engagement, the clutch will be filled by a fast filling up to a defined minimum pressure. The fast filling is at least subdivided into two phases comprising a basic filling phase and an extension and/or a cutout phase. At the end of the basic filling phase, the actual clutch pressure is measured, and then, when the actual clutch pressure is equal to or larger than the minimum pressure, the extension and/or cutout phase is activated immediately following the basic filling phase. When the actual clutch pressure is lower than the minimum pressure, activation of the extension and/or the cutout phase is at least delayed by a pressure holding phase and, if necessary, by a pressure surplus phase.

Abstract: A method of adapting the rapid filling time of a clutch. During adaptation, the clutch is filled by at least two successive rapid filling pulses with increasing rapid filling times. For each rapid filling pulse a reaction, resulting from the filling pulse, is monitored. If a defined reaction, for one of the rapid filling pulses, is recognized for the first time whereas for the, or for each of the previous rapid filling pulse(s) the defined reaction was not observed, then as a function of the rapid filling time of that rapid filling pulse for which the defined reaction was recognized for the first time, carrying out the adaptation of the rapid filling time and, for each rapid filling pulse used for the adaptation, gradients of the clutch pressure produced as a result of the respective rapid filling pulse are evaluated to determine the defined reaction pressure.

Abstract: A method for clutch characteristic curve adaptation of an automatic dual-clutch transmission which comprises two sub-gearboxes each with an input shaft connected, via a friction clutch, to the drive shaft of a motor and several gears that are shifted via a friction-synchronized gear clutch. A value of the current touch point of the friction clutch can be determined with the motor running and the gears disengaged in a load-free sub-gearbox. The method includes the steps of starting synchronization of a gear clutch with a defined force of a regulator. Waiting until the gear clutch is synchronized. Engaging the friction clutch of the until the gear clutch is synchronizes. Determination the current touch point from the current synchronous torque of the gear clutch and the current regulating parameter of the associated clutch regulator. Then, adapting the clutch characteristic curve of the friction clutch in view of the current touch point.

Abstract: A method for clutch characteristic curve adaptation of an automatic dual-clutch transmission which comprises two sub-gearboxes each with an input shaft connected, via a friction clutch, to the drive shaft of a motor and several gears that are shifted via a friction-synchronized gear clutch. A value of the current touch point of the friction clutch can be determined with the motor running and the gears disengaged in a load-free sub-gearbox. The method includes the steps of starting synchronization of a gear clutch with a defined force of a regulator. Waiting until the gear clutch is synchronized. Engaging the friction clutch of the until the gear clutch is synchronizes. Determination the current touch point from the current synchronous torque of the gear clutch and the current regulating parameter of the associated clutch regulator. Then, adapting the clutch characteristic curve of the friction clutch in view of the current touch point.

Abstract: A method for determination of the synchronization point of an automatic double clutch transmission comprising two component transmissions each with one input shaft that connects via a friction clutch to the drive shaft of a motor and several gears, each shifted via a friction-synchronized gear clutch. The method includes the steps of selecting the gear clutch of a gear of a momentarily load-free component transmission; moving the associated gear setter to the neutral position as needed; successive movement of the associated gear setter in the direction of the shifting position of the selected gear until synchronous running is attained on the gear clutch within an applicable threshold; determination of the current synchronization point of the gear clutch from the current adjustment parameter of the associated gear setter; and adaptation of the valid synchronization point of the gear clutch to the current synchronization point.