Patent ID: 8388497

Claim:
A method for controlling the operation of changing from a lower gear to a higher gear in a motor vehicle equipped with an engine, a driving shaft and a double clutch transmission including first and second primary shafts, as well as first and second friction clutches operable to connect the first primary shaft and the second primary shaft, respectively, to the driving shaft, the gear changing operation including a crossover phase of the friction clutches during which the first friction clutch associated with the gear to be disengaged is opened, starting from a condition in which the angular velocity of the driving shaft is equal to the angular velocity of the first primary shaft, and the second friction clutch associated with the gear to be engaged is closed, the method comprising the steps of: a) defining a torque profile for the first friction clutch during the crossover phase having a given initial value and a zero final value, b) defining a torque profile for the second friction clutch during the crossover phase having a zero initial value and a given final value, and c) defining a torque profile for the engine during the crossover phase having a given initial value and a given final value, wherein the torque profiles of the second friction clutch and of the engine are calculated so that the final value of the longitudinal acceleration of the vehicle is equal to a given percentage of the initial value of the longitudinal acceleration of the vehicle.