Method for controlling a torque transmitting device with learning function

Abstract

Apparatus (control device) and a method for controlling a torque transmitting device such as a brake, wet clutch, dry clutch (10) during a filling and slip phase is provided, e.g. for coupling a first shaft (12) to a second shaft (14) via the wet clutch (10). A reference profile (52) for a control variable is provided, wherein the chronological progress of said control variable influences the position of a piston (22) for actuating clutch elements (16, 18), Each clutch element (16, 18) is connected to the first shaft (12) or the second shaft (14), with respect to a cylinder (20) of the wet clutch (10), and the control variable is determined during each coupling and a valve (38) for applying a pressure source to the piston (22) is operated, wherein the valve (38) is controlled during each coupling by means of a feed forward closed loop control (54) such that the control variable follows the reference profile (52). Due to the increased control quality by considering non-linear effects by means of the reference profile (52) for the feed forward closed loop control (54) at every coupling through learning, the coupling time can be shortened without increasing the risk of an uncomfortable coupling behavior.

Dependencies are inferred from the claim text.