Method for actuating a clutch of a hybrid drive train, and drive train having a clutch

Abstract

The invention relates to a method for actuating a clutch (1) of a hybrid drive train (2) by means of an actuating device (3), wherein the actuating device (3) has an electrical actuator unit, which acts, by means of a sliding element, in an adjusting manner on an actuation bearing, which in turn is or can be kinematically coupled to a control element of the clutch (1), wherein a pre-load point (6), at which the actuation bearing is pressed against the control element with a minimum sliding force, is determined in that the sliding element is first moved over a sliding path, in which the pre-load point (6) is theoretically located, an actual characteristic curve (7) that describes the behavior of a physical motion characteristic value of the sliding element thus being created, then the actual characteristic curve (7) is compared with a target characteristic curve (8) stored for said sliding path, and the pre-load point (6) is defined (900) at the point along the actual characteristic curve that has no or the smallest deviation from a comparison point of the target characteristic curve (8), wherein at the pre-load point, the actuation bearing is pressed against an adjusting element with a minimum sliding force, the actual characteristic curve describes the characteristic of the physical motion characteristic value of the sliding element, and the preload point (6) is theoreticallyin the sliding path. The invention further relates to a hybrid drive train (2) for a motor vehicle.

Description

technical field [0001] The invention relates to a method for actuating a clutch, preferably a friction clutch, of a hybrid drive train by means of an actuating device, wherein the actuating device has an electric actuator unit which acts in an adjusted manner on the actuation by means of a sliding element The actuating bearing is in turn kinematically or movably coupled to an adjusting element of the clutch, such as a lever spring, in particular a disk spring. Furthermore, the invention relates to a hybrid drive train for a motor vehicle, such as a passenger car, a truck, a bus or other commercial vehicles. Background technique [0002] A prior art of this type is known from DE 10 2013 205 109 A1. A method for operating an actuating device for a clutch is disclosed therein. The clutch has a stator arrangement, a rotor arrangement rotatable relative to the stator arrangement, and a slider arrangement axially displaceable to a limited extent with respect to the rotor arrange...

AI Technical Summary

Problems solved by technology

[0006] However, this known formation of the intersection point has the disadvantage that under strongly changing frame conditions, such as when the clutch is severely worn or when the temperature rises significantly, the intersection point no longer occurs at the actual preload point

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