F16D2500/70488

Method for preventing baulking of DCT for vehicle
09599173 · 2017-03-21 · ·

A method for reducing baulking of a dual clutch transmission (DCT) for a vehicle includes a first engaging step engaging an odd-stage clutch and an even-stage clutch of a DCT in a case of an ignition-on state. An ascertaining step ascertains a range positioned by a shift lever when an engine is cranked after the first engaging step. A second engaging step engages shift gears respectively, after disengaging at least one of the odd-stage clutch and the even-stage clutch depending on the ascertained range position of the shift lever.

Full clutch slip power shift of a dual clutch transmission

A system for operating a dual clutch transmission, including launch/creep controller, shift logic, and a clutch control assembly. The shift logic is configured to intercept a torque command including a target clutch torque from the launch/creep controller as it transmits the target clutch torque to the clutch assembly. The shift logic engages a preparation phase that increases torque on an on-coming clutch to a prefill torque. The shift logic then engages a torque phase that transfers torque between the off-going clutch and the on-coming clutch by simultaneously decreasing the off-going clutch torque and increasing the on-coming clutch torque. The off-going clutch and the on-coming clutch remain in a slipping state that maintains the target clutch torque during the transfer.