Method for non-microslip based dual clutch transmission power on up shift

摘要

A method of controlling a dual clutch transmission power on up shift including an on-coming clutch and an off-going clutch. The method includes implementing a prep phase comprised of decreasing torque on the off-going clutch, monitoring the off-going clutch speed to determine a slip point, and adding a bump torque to the off-going clutch when the off-going clutch reaches the slip point. The method implements a torque phase transferring torque from the off-going clutch to the on-coming clutch by increasing torque on the on-coming clutch towards an engine torque, decreasing torque on the off-going clutch, and simultaneously keeping the combination of torques greater than the slip point.

主权项

1. A method of controlling a dual clutch transmission power on up shift, including an on-coming clutch and an off-going clutch, comprising:
implementing a prep phase comprising:
decreasing torque on the off-going clutch;monitoring the off-going clutch speed to determine a slip point, the slip point comprising the off-going clutch torque when slip is initiated;adding a bump torque to the off-going clutch when the off-going clutch reaches the slip point, the bump torque preventing any further off-going clutch slip; implementing a torque phase transferring torque from the off-going clutch to the on-coming clutch, the torque phase comprising:
increasing torque on the on-coming clutch towards an engine torque; anddecreasing torque on the off-going clutch;wherein as the off-going clutch torque is decreasing, the combination of the on-coming clutch torque added to the off-going clutch torque remains greater than the slip point.