1H
Examples: 12 indicates a
battery
manufactured August 12,
1941
1J
1 indicates a battery manufactured
September 1, 1941
CHECKING BATTERY-CARS AND
TRUCKS IN SERVICE
The battery electrolyte of cars
and trucks in service should be checked, and distilled water added as
necessary, at weekly or semi-monthly intervals depending upon weather and
driving conditions—it should be checked more often in hot weather on
long drives.
THE GENERATING SYSTEM
The function of the generating
system may be summed up as follows: It converts a small amount of
mechanical energy from the engine into electrical energy, which is
carried through the wiring to the battery where it is stored for future
use. In actual operation some of the energy may be used directly from the
generator, but for explanatory purposes this electrical energy is assumed
to flow from the generator to the battery and then drawn from the
latter.
The generator used on the 1942
passenger cars and trucks is a two-brush shunt wound machine, controlled
by a combination current and voltage regulator of the vibrating type. The
two regulating units operate independent of each other.
The voltage regulator controls the
maximum voltage of the generator and keeps it from exceeding a
predetermined value fixed by the setting of the regulator. The actual
charging rate to the battery varies, depending upon the state of
charge in the battery.
The current regulator controls the
maximum amperage output of the generator and prevents it from exceeding 34
to 36 amperes, which is the setting of the current regulator, thereby
preventing damage to the generator due to overload.
The shunt wound generator
controlled by current and voltage regulation is an ideal generating
unit since it has the ability to supply the necessary current for lights
and accessories in addition to charging the battery. The maximum charging
rate is available from a speed of approximately 25 miles per hour to
maximum speed. In other words, the maximum output curve is flat and does
not fall off at high speeds.
In addition to the above, the
voltage regulator prevents excessive voltage at the lamp bulbs,
ignition points, and radio, thereby prolonging their
life.
