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ELECTRICAL-In the
early days of the
auto-
mobile industry, elec-
tricity was used only
for the ignition
.
Later
the
electrical
equip-
ment was expanded to
take
over
the starting
and lighting of the car.
Then as time went on,
the discrimina ling
motorist bega n to expect
conveniences in his automobile rivaling those of the modern home.
Electricity came to playa more and more vital role, until today the
electrical system is called upon to take care of such eqUipment as
radios, heaters, spotlights, horns, Cigar lighters, and even electric fans
.
Th~ electrical system in your car is like a miniature electrical
plant
that serves a city. The generator and charging circuit is like
a central power house with the battery as an electricol storage
tank
.
From the generator some of the moin feed wires go to the
distributor, which can be thought of as the central switchboard of
the ignition system because it intermittently and automatically con-
nects each spark plug with the electrical current so that ignition of
the gas in the cylinder occurs a
t
exactly the right time
.
Other feed
wires go to the lights, horns and electrical accessories,
The tests on the electrical system check each of
the
three electrical
circuits; the starting, the ignition, and the charging circuits.
CARBURETION -
Car buretion is
the automa tic mixing of gasoline
with air in the proper proportions
a
t
all engine speeds and tempera-
tures.
This is done by the carburetor
and the built-in automatic choke.
In the carburetor all the openings
through which fuel and air travel
are fixed, excepting the idling jets
which are controlled by the idling
adjusting screws. All other mixtures
of gasoline and air are
auto-
matically controlled in relation to
the needs of the engine by metering
rods.
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