METHOD FOR ANTICIPATING DOWNSHIFTING AND FOR MONITORING AN AUTOMATIC TRANSMISSION

摘要

The invention relates to a method for anticipating downshifting upon uphill drive on a vehicle provided with an automatic transmission and including change laws imposing a change to the lower gear based on pre-established downshifting curves, characterised in that the change to a lower gear (R-1) is imposed to the transmission independently from the gear setpoint established by the change laws when the acceleration that can be reached at the maximum torque aest(Cm_max) on the current gear (R) is lower than an acceleration threshold necessary for maintaining the vehicle speed.