AUTOMOTIVE TRANSMISSION WITH KICKDOWN CONTROL METHOD BASED ON TORQUE CALCULATION

摘要

The present invention relates to automotive transmissions, and more particularly to controlling kickdown shifts in automotive transmissions based on accumulator feedback. A transmission control method improves shift feel during kickdown shifts. The release clutch is fully released at the initiation of the kickdown shift. The release clutch is then reapplied when the volume of the release clutch reaches a threshold capacity. The volume of the release clutch is slowly ramped down, thereby increasing turbine speed. When the turbine speed reaches a threshold, the apply clutch is actuated. The apply clutch is actuated by controlling the volume of the apply clutch according to a target volume.