Method for determining an adjustment parameter for a hydraulic actuator arrangement in a motor vehicle drivetrain

Method for determining an adjustment parameter in a hydraulic actuator arrangement for a motor vehicle drivetrain, wherein the actuator arrangement has a pump and a hydraulic cylinder, wherein a pressure port of the pump is connected to a port of the hydraulic cylinder, wherein the adjustment parameter is a function of the volume of the fluid that must be delivered by the pump in order to realize a predetermined operating point of the actuator arrangement, wherein the operating point is defined by a value pair of an operating point rotational speed value of the pump and an operating point control value of the pump, having the steps:

• regulating the pump to the operating point rotational speed value such that the pump delivers a fluid volume flow rate corresponding to the operating point rotational speed value;
• and
• integrating the fluid volume flow rate over the time until a termination operating state of the actuator arrangement, in which an actual control value of the pump is less than or equal to the operating point control value.

Method for actuating a friction clutch of a motor vehicle drivetrain by means of a hydraulic actuator arrangement which has a pump and a hydraulic cylinder, wherein a pressure port of the pump is connected to a port of the hydraulic cylinder, wherein the friction clutch is coupled to a piston of the hydraulic cylinder, and wherein an operating point of the actuator arrangement, which is defined by a value pair of an operating point rotational speed value of the pump and an operating control value of the pump, and which corresponds to an operating point of the friction clutch, is adjusted using an adjustment parameter that has been determined by means of a determination method, having the steps:

• regulating the pump to the operating point rotational speed value such that the pump delivers a fluid volume flow rate corresponding to the operating point rotational speed value;
• and
• integrating the fluid volume flow rate over the time until a termination operating state of the actuator arrangement, in which an actual control value of the pump is less than or equal to the operating point control value.