Patent ID: 6073740
Filing Date: 2000-06-13
Classification: F16H

Abstract:
A process for controlling a torque converter lock-up clutch (WK) of an automatic transmission comprising the steps of:adjusting initiation of slip (S6) of the torque converter lock-up clutch (WK) relative to a speed of rotation of an output shaft of the automatic transmission by using an electronic transmission controller to determine a gradient of the speed of rotation (dn/dt);detecting a significant deceleration when the gradient of the speed of rotation (dn/dt) exceeds a first threshold value (.vertline.dn/dt.vertline.); andfacilitating the quick opening (S6) of the torque converter lock-up clutch (WK) in response to the significant deceleration so that the torque converter lock-up clutch (WK), initially in a closed or regulated slipping state, has a reduced engaging force and effects a lower transmissible torque preventing at least one of a rapid deceleration and stalling of the engine.