194003071 - E5010 STARTING AND RECHARGING - DESCRIPTION

The ignition and recharging circuit comprises the battery, starter motor and alternator.The starter motor consists of a d.c. motor supplied by the battery and an excitation electromagnet.The ignition system adopted for this vehicle differs from the classic products used previously in the application of an ignition device (TEG Reader) combined with the steering lock control unit (NBS).According to the position of the key (TEG) inside the ignition device, the steering lock control unit determines: the +15 power supply enablement request to the Body Computer (ON position), vehicle start-up +50 (START position) and, if this is successful, the distribution of power to the vehicle and the associated loads (INT, INT/A, 15/54).The starting stage anticipates that at the same time as the key is turned to the START position the clutch pedal will be pressed or, in recovery conditions, the brake pedal.When the steering lock is able to supply a +50 power supply to the starter motor, the motor coils are supplied with power to generate the electromagnetic forces that turn the motor pinion. This simultaneously activates the electromagnet that operates the mechanism that causes the pinion to mesh with the flywheel ring gear and thus turn the crankshaft.The alternator recharges the battery during normal engine rotation. The alternator shaft (rotor) is turned by the crankshaft via a belt. When supplied by an excitation current, the rotor generates a magnetic field that sets up an alternating current in the fixed winding (stator). A rectifying diode bridge on the back of the alternator allows the alternating current to be rectified to a direct current that is sent to recharge the battery.A voltage governor, also built into the alternator, maintains the power supply at a constant voltage (14 V) throughout the load variation and engine speed ranges.For further details,    See descriptions 5520 ENGINE STARTINGThe recharging system efficiency is controlled by the Body Computer, which receives and measures the D+ signal from the alternator with the engine running (engine speed above 700 rpm).If a fault is detected, the warning light in the instrument panel is lit up.The Body Computer also acquires a battery voltage value in the range 6 - 18 V according to a control strategy known as SBMT.The information is sent via the CAN to the door nodes and cuts out certain services after a time of 15 minutes. For example,    See E2520 GLOVE COMPARTMENT LIGHT - LUGGAGE COMPARTMENT LIGHT - SUN VISOR LIGHT