Method for controlling a torque converter clutch and a powertrain comprising said torque converter clutch and a control module performing said method

摘要

A method and apparatus are provided for controlling actuation of a clutch device (25) for a torque converter (20) operative to transmit torque between an engine (10) and a transmission (30). The method comprises controlling actuation of the clutch device (25) effective to maintain an engine speed within a predetermined speed range when a transmission input speed (N I ) is less than a threshold; and, controlling actuation of the clutch device (25) effective to maintain slippage across the torque converter (20) substantially at a predetermined slippage level when the transmission input speed (N I ) is greater than the threshold.