Management method of an automotive alternator and system

A management method of an automotive alternator operatively connected to a battery and to an electrical control unit (ECU) of an internal combustion engine (ICE), wherein said method comprises:

• determining a battery charge level of the battery, between BC1 (corresponding to a fully charged condition of the battery);
• BC2 (corresponding to a working battery charge level);
• and BC3 (corresponding to a low battery charge level);
• determining a displacement speed of the ICE;
• and
• determining a gear change of the ICE;
• and
• determining an engine rotation speed;
• wherein the electrical control unit is configured for:
• at level BC1, maintaining the alternator in and electrically and mechanically uncoupled state;
• at level BC3, coupling the alternator electrically to the battery and mechanically to a belt operatively driven by the ICE;
• and
• at level BC2, occurring sequentially is:
• the alternator is mechanically coupled to the belt when (i) the displacement speed of the automotive increases to a value greater than a predetermined value (VLim) after at least one gear change, and (ii) subsequent to the at least one gear change, during the period of time in which the clutch pedal is activated and a consecutive gear change occurs, and
• after the alternator is mechanically coupled to the belt, electrically coupling the alternator to the battery when the vehicle is being driven in cut-off mode and the engine rotation speed is above a predetermined limit value (RLim);
• wherein the cut-off mode maintains rotation of the ICE without using the accelerator pedal.