323002801 - E5010 IGNITION AND RECHARGING - DESCRIPTION (Robotized gearbox)

DESCRIPTION

The ignition and recharging circuit comprises the battery, starter motor and alternator.The starter motor consists of a direct current motor supplied by the battery.On this version the enablement for the rotation of the starter motor is supplied by the robotized gearbox control unit.The control unit only enables the go ahead for starting, operating a dedicated relay in the engine compartment junction unit if the following conditions are met: gear lever in position N and brake pedal pressed.    See E7051 ROBOTIZED GEARBOX With the alternator still with the ignition key in the ON position, the warning light in the instrument panel comes on and sends a power supply to the voltage regulator built into the alternator via terminal D+.In these conditions the energizing circuit is enabled to earth by the regulator electronics.With the alternator rotating through the effect of the variation of the rpm and the magnetic field, a three-phase alternating voltage is produced in the electrical circuit which rectified by the diode bridge can exit terminal B+.When the upper fixed calibration level is reached it charges the battery and supplies the system.The efficiency of the recharging system is controlled by the Body Computer:- the Body Computer checks the efficiency of the alternator recharging system by detecting two parameters: the voltage signal from alternator terminal D+ and the engine rpm signal that also receives signals from the engine control unit via the CAN.- at the key on, as long as the voltage is below around 5.5V, the Body Computer signals the insufficient recharging status; when the voltage exceeds 5.5 V, the warning light goes out;- when the engine is running, after the engine speed remains above 1500 rpm for at least two seconds, the Body Computer starts to manage the D+ signal depending on the two intervention levels (4.5 and 5.5 V). If the voltage goes below the lower level, the recharging signal is activated and interrupted as soon as the voltage goes above the upper level.