Operating vehicle drive train with clutch assembly for transmitting torque

A method for operating a drive train of a vehicle having a clutch assembly, wherein the clutch assembly is actuatable via an actuating device for switchable transmission of a torque;

• wherein a first state of the actuating device, and thus a second state of the clutch assembly, is settable via a position of a drive unit of the actuating device;
• wherein the method comprises:
• a) determining that a first torque request to the clutch assembly is constant at least within an interval of at most 100 milliseconds or has a maximum torque deviation of at most 100 newton meters within the interval;
• b) determining that a first position of the drive unit is constant within the interval or has a maximum position deviation that corresponds to the maximum torque deviation;
• c) controlling the drive unit with a dither function, wherein a position of the drive unit is continuously varied about the first position;
• and
• d) ending the dither function when the conditions stated in steps a) and b) are no longer met.

An electronic control unit for a drive train of a vehicle having a clutch assembly, wherein the clutch assembly is actuatable via an actuating device for switchable transmission of a torque;

• wherein a first state of the actuating device, and thus a second state of the clutch assembly, is settable via a position of a drive unit of the actuating device;
• the control unit configured to:
• a) determine that a first torque request to the clutch assembly is constant at least within an interval of at most 100 milliseconds or has a maximum torque deviation of at most 100 newton meters within the interval;
• b) determine that a first position of the drive unit is constant within the interval or has a maximum position deviation that corresponds to the maximum torque deviation;
• c) control the drive unit with a dither function, wherein a position of the drive unit is continuously varied about the first position;
• and
• d) end the dither function when the conditions stated in steps a) and b) are no longer met.