METHOD OF CONTROLLING A DOUBLE CLUTCH TRANSMISSION OF VEHICLE, CAPABLE OF CONDUCTING A SERIES OF DOWNSHIFTING OPERATIONS FROM A PRECEDING GEAR TO A SUBSEQUENT GEAR VIA A CURRENT GEAR IN RESPONSE TO DECELERATION OF A VEHICLE

摘要

PURPOSE: A method of controlling DCT(Double Clutch Transmission) of vehicle is provided to conduct a series of downshifting operations from a current engaged gear to lower gear, thereby preventing the shock and noise from gear shifting.;CONSTITUTION: A DCT performs a continuous slip-controlling of a clutch which has been in an engaged stage in a preceding gear at least until a shift gear of a subsequent gear is engaged(S10). The DCT slip-controlling controls the amount of torque transmitted by the clutch in response to a deceleration rate of a vehicle, which increase the amount of torque transmitted by the clutch as the deceleration rate of the vehicle increases. The DCT continuously performs a slip-controlling the clutch, which has been in the engaged state in the preceding gear, all throughout the current gear to the subsequent gear, and performs a shifting to engage the subsequent gear.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Releasing to a preceding terminal clutch slip state when the transmission is completed from a preceding terminal(N+1) to a current terminal(N); (BB) Following terminal(N-1) transmission gear coupling in a preceding terminal(N+1) clutch slip control; (CC) Current terminal(N) clutch release & preceding terminal(=following terminal) clutch coupling; (DD) Current terminal(N) - following terminal(N-1) transmission completion; (S10) Preceding terminal(N+1) clutch slip control during a current terminal(N)