184002210 - E5010 STARTING AND RECHARGING - DESCRIPTION (Robotized gearbox)

Description

The starting 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. When the ignition key is turned as far as it will go (AVV), the motor windings are supplied to generate the electromagnetic forces that are used to turn the starter 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.On this version with a robotized gearbox, the enablement for the rotation of the starter motor is supplied by the robotized gearbox control unit itself    See E7051 ROBOTIZED GEARBOX.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.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 the battery voltage value in the range 6 - 18 V.The information is then supplied via the CAN to the control unit node in the door which excludes any services if there is a drop in the actual voltage (e.g.    See E2510 COURTESY LIGHTS)