Controlled capacity torque converter clutch control system

摘要

A torque converter clutch control system has a number of operating modes among them an off mode where torque coupling is fluidic, a controlled capacity mode where the torque coupling is fluidic and mechanical during period of positive engine torque, an apply mode for smoothly transitioning from the OFF mode to the controlled capacity mode, and a release mode for smoothly transitioning from the controlled capacity mode to the off mode. Additionally, a lock mode is provided where torque coupling is mechanical via the torque converter clutch and a coast mode where torque coupling is mechanical and fluidic during periods of negative torque.