Mitsubishi L200. Manual - part 218
CHARGING SYSTEM
ENGINE ELECTRICAL
16-2
CHARGING SYSTEM
GENERAL INFORMATION
M1161000102045
The charging system uses the alternator output to
keep the battery charged at a constant level under
various electrical loads.
OPERATION
AK400075
Voltage
Time
Approximately
14.4 V
AB
Rotation of the excited field coil generates AC volt-
age in the stator.
This alternating current is rectified through diodes to
DC voltage having a waveform shown in the illustra-
tion.
The average output voltage fluctuates slightly with
the alternator load condition.
When the ignition switch is turned on, current flows in
the field coil and initial excitation of the field coil
occurs.
When the stator coil begins to generate power after
the engine is started, the field coil is excited by the
output current of the stator coil.
The alternator output voltage rises as the field cur-
rent increases and it falls as the field current
decreases. When the battery voltage (alternator "S"
terminal voltage) reaches a regulated voltage of
approximately 14.4 V, the field current is cut off.
When the battery voltage drops below the regulated
voltage, the voltage regulator regulates the output
voltage to a constant level by controlling the field cur-
rent.
In addition, when the field current is constant, the
alternator output voltage rises as the engine speed
increases.
CAUTION
When the specified alternator is not used, each
ECU would probably fail.