PROCEDURES FOR THE STEERING OF A WAY-BY-WAY COP IN AN AUTOMATIC SECTOR WITHIN A LAST RETURN CHANGE AND RECEIVED AUTOMATIC SECTOR

摘要

Procedure for controlling an outgoing coupling (48, 53) in an automatic transmission (14, 114) during a power down, including:Detect the initialization of subtraction;Reduce a pressure command to the outgoing coupling (48, 53) to a threshold level;insert a calibrated error value into a pressure control command for the outgoing coupling (48, 53) during the inertia phase of switching off;Synchronize the speed of the outgoing coupling (48, 53) with the speed of the incoming coupling (38, 138) during the torque phase of shutdown;determine the pressure of the outgoing coupling (48, 53) and the torque of the outgoing coupling (48, 53) after a calibrated duration of synchronization of the coupling speeds;recording a coupling reinforcement as a function of the pressure of the outgoing coupling and the torque of the outgoing coupling (48, 53);andUse the recorded clutch reinforcement to control a subsequent gear switching under load.