1928 Cadillac - GM Heritage Center

TIIK NEW CADILLAC
DETAILS OK CONSTHl'CTIoN
tJuiulion O^iplem
he Cadillac engine lias a single Delco-Rciny ignition system of the high
>n type, a simple, high grade and reliable design embodying the followements:
he source of current is the battery charged by a generator with aulo-
• regulation of charging rate.
n ignition timer, which interrupts the low tension current at the proper
it to produce a spark high tension circuit. An induction coil, transforinle
primary current of six volts into one of sufficient voltage to jump bcl
the points of the spark plugs. The coil is of the ironclad type and is
letely enclosed, making it waterproof.
condenser, which assists the induction coil to raise the voltage, and
i protects the contact points of the ignition timer against burning,
high tension distributor of the jump-gup type which directs the distrin
of the high tension current to the spark plugs.
:ructurally, the ignition timer, the high tension distributor and the con-
•r constitute a single assembly which is bracketed to the front of the
;caso.
UOl'ULK 1SKT OF CONTACT POINTS
he ignition timer, which is driven by a vertical shaft through spiral gears
the camshaft, lias two sets of contact points. These break alternately,
ng t he work which would otherwise be done by one.
he firing order of the cylinders is as follows:
Front
8 7 :> *
l t (i :;
Al'TOMATIC SI'AUK CONTKOL.
ne of the many features embodied in the Cadillac is the further developof
the automatic spark control which relieves the operator of practically
ark lever manipulation.
1G
The Cadillac automatic spark control is so effective thai it has been possible
to remove the spark control lever from the steering column and place it
on the instrument board.
Looluui Ohplom
The tempera lure of the Cadillac engine is maintained at the point of
maximum efficiency and smooth running by forced water circulation, with
thermostatically controlled radiator shutters.
WATEli
l'IMl'
Circulation of water through the radiator and water jackets is maintained
by a centrifugal pump mounted on the right side of the engine and
driven by a silent chain from the crankshaft. The pump is coupled to the
driven sprocket by a flexible coupling of laminated spring steel. This permits
the pump shaft to align itself and run perfectly true in the packing.
TIIEKjMOSTATiC
CONTROL
Thermostatic control of engine temperature was developed and first employed
by Cadillac.
Vertical, balanced radiator shutters, controlled by a thermostat in tlie
upper radiator tank, control the cooling water temperature.
When the engine is cold, the shutters are closed, cutting off the passage of
air through the radiator. As soon as the temperature of the water reaches a
predetermined point, the thermostat opens the shutters to the exact degree
necessary to maintain the correct temperature.
The shutters not only control the temperature of the water, but. also the
temperature of the air under the hood, which assists carbnretion and, with
the use of the thermostatically controlled carburetor, greatly reduces the
"warming up" period.
HADIAI'OI!
The Cadillac radiator is of an entirely new design being outstandingly
individual and possessing a distinction and impressivencss quite its own. It is
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