Patent ID: 8118708
Filing Date: 2012-02-21
Classification: F16D,Y10T

Abstract:
1. A method for controlling an automated friction clutch arranged in a drive train of a motor vehicle in the force flow between a drive engine ( 3 ) and a drive transmission ( 4 ), which is configured to be passively engaged by spring pressure and can be disengaged or engaged by means of a pressure-medium-actuated clutch actuator ( 14 ), such that an actuation position (x_K) of the clutch actuator ( 14 ) or of an associated transmission element is determined and used for controlling the friction clutch ( 2 ), and in addition an actuating pressure (p_K) of the clutch actuator ( 14 ) is determined, and a required change of a clutch torque (M_K) to a new nominal value (M_K_soll) takes place under pressure control, and the actuating pressure (p_K) of the clutch actuator ( 14 ) is adjusted to a nominal value (p_K_soll) which corresponds to the nominal value (M_K_soll) of the clutch torque (M_K), the method comprising the steps of: setting the nominal pressure (p_K_soll), and then, upon detecting an actuation path difference (Δx_K=x_K_soll−x_K_ist), overriding the nominal pressure (p_K_soll) in order to reach a nominal position (x_K_soll).