Control method for vehicle with DCT

A control method for a vehicle with a dual clutch transmission (DCT), comprising:

• a reacceleration-determining step for determining whether there is request for reacceleration of the vehicle from a driver with two clutches being open before the vehicle decelerates and stops;
• and
• a speed-considering step for following a different coupling process in a clutch of a target shaft, in accordance with a level of a current engine speed and speeds of input shafts to which the two clutches are connected respectively, when it is determined that there is the request for the reacceleration of the vehicle;
• wherein the target shaft is an input shaft whose a target shift gear is determined in accordance with the current traveling speed of the vehicle,
• wherein the speed-considering step compares a current engine speed with a speed of the target shaft and categorizes the coupling process as a first case where the current engine speed is the speed of the target shaft or more, a second case where the current engine speed is less than the speed of the target shaft and is larger than a speed of an interlock shaft, and a third case where the engine speed is less than the speed of the target shaft and the speed of the interlock shaft, and
• wherein in the first case, a starting control process sets an engine target speed in accordance with the traveling status of a vehicle and controls and engages the clutch of the target shaft based upon engine torque such that the engine speed satisfies the engine target speed,
• in the second case, an interlock control process operates the clutch of the target shaft and the clutch of the interlock shaft to be engaged until the engine speed reaches the speed of the target shaft, and then finishes engaging the clutch of the target shaft by means of handover, and
• in the third case, a non-interlock control process engages the clutch of the target shaft while controlling the engine speed in accordance with the speed of the target shaft.