Patent ID: 7854683
Filing Date: 2010-12-21
Classification: F16H,Y10T

Abstract:
1. A system for controlling a torque converter clutch in a vehicle powertrain, comprising: a controller having an input for receiving powertrain operating parameter information, the controller configured to preliminarily establish that a minimum powertrain operating condition has been achieved and then determine a torque converter speed ratio based on the powertrain operating parameter information and to compare the speed ratio to a specified speed ratio limit; the controller further configured to determine a target torque converter slip when the speed ratio exceeds or meets the specified speed ratio limit; to compare the target slip with a desired slip value based on a vehicle noise, vibration or harshness (NVH) limit; and to control torque transmission of the torque converter clutch based on comparison of the target slip and the desired slip value based on an NVH limit.