Patent ID: 8543304
Filing Date: 2013-09-24
Classification: F16D

Abstract:
1. A method of operating a clutch release system of a vehicle having an electrically actuable clutch release mechanism with a first sensor for detecting a position of a release plunger of the clutch release mechanism, a second sensor for detecting a position of a clutch actuating device and a control device controlling the release plunger as a function of a detected position of the clutch actuation device, the method comprising the acts of: storing a characteristic function describing a relationship between the position of the clutch actuation device and the position of the release plunger in a random-access memory arranged in the clutch release system; detecting the position of the clutch actuation device and of the release plunger for a defined position of the clutch actuation device; actuating the clutch release system to achieve a constant clutch release notwithstanding wear of the clutch release system by factoring the characteristic function; during actuation of the clutch release system, determining by the control device an updated characteristic function, the updated characteristic function describing an actual relationship between the position of the clutch actuation device and the position of the release plunger, wherein the updated characteristic function is shifted with respect to the characteristic function through a distance that corresponds to a material thickness eroded by wear on a clutch lining of a clutch disk, wherein a point on the characteristic function is determined at which the clutch disk moved by the clutch release system enables a first force transmission; and replacing the stored characteristic function with the updated characteristic function after the actuation of the clutch release system in order to provide an actual characteristic function during a next actuation of the clutch release system.