Abstract
Most vehicles equipped with automatic transmissions use torque converter clutches to reduce the fuel consumption, and recently its slip control scheme is studied for the expansion of the operating region of the torque converter clutch and thus for the further improvement of the fuel economy of vehicles. In this article, the analysis of the torque converter clutch system including the line pressure control unit of the automatic transmission and the actuating hydraulic control unit of the torque converter clutch is performed, and a feedback controller for its slip control is designed. The performance of the designed slip controller is verified by simulations and experiments, and the effect of the torque converter clutch slip control on the fuel economy is examined using a driving cycle simulation.
