Operation index

Operation index

• - DESCRIPTION
• - WIRING DIAGRAM
• - DESCRIPTION OF OPERATION
• - COMPONENTS
• - COMPONENTS LAYOUT

DESCRIPTION

The ignition and recharging circuit comprises a battery, starter motor and alternator.

The battery (12V) is low maintenance lead type.

The starter motor consists of a direct current motor supplied by the battery and an excitation solenoid.

When the ignition key is turned to the extreme position (AVV), the starter motor windings are supplied, producing electro-magnetic forces which rotate the motor pinion. At the same time, the solenoid is energized and operates the mechanism for engaging the pinion in the flywheel ring gear, thus turning over the engine.

The alternator recharges the battery during normal engine rotation.

The alternator shaft (rotor) is turned by the crankshaft by means of a belt. When supplied with an excitation current, the rotor generates a magnetic field that induces an alternating current in the fixed winding (stator).

A diode rectifying bridge located on the back of the alternator transforms the alternating current into a direct current, which is sent to recharge the battery.

A voltage regulator, also built into the alternator, maintains a constant voltage supply (about 14V) throughout the load and engine speed ranges.

Version with automatic clutch, this system has a safety logic which prevents the vehicle from being started if a gear is engaged: the control signal for the starter motor passes through a special relay energized by the automatic clutch control unit which provides the necessary go ahead.