METHOD AND DEVICE FOR CONTROLLING A SPEED PRESELECTION MECHANISM OF A VEHICLE GEARBOX SO AS TO LIMIT THE AMPLIFICATION OF UNDESIRABLE FREQUENCIES

摘要

A control device (D) is provided in a vehicle (V) having a power train that comprises a gearbox (BV) having a speed preselection mechanism (MP) and has a variable operational frequency mode. Said device (D) includes a control means (MC) that is configured, in the event that the power train generates an undesirable frequency amplified by a gearbox (BV) frequency mode that is running, to trigger a modification in the operation of the speed pre-selection mechanism (MP) so as to shift the frequency mode that is running.