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GENERAL DESCRIPTION
ENGINE
The engine, located in the rear of the vehicle,
is
attached by 4 bolts to
the
recessed
flange of the rubber mounted transmission.
T
wo pairs of cy-
linders are horizontally opposed. Each pair has one common cylinder head
made of light
alloy.
T
he overhead valves are located in the cylinder head and
are operated from the camshaft by means of push rods, cam followers and
rocker arms. The short and counter-balanced crankshaft rests in four bear-
ings
and is heat-treated at its four points of support.
It
drives the camshaft
by means of helical gears. The connecting rods are fitted with lead-bronze
bearings.
T
he pistons are made of light alloy.
A
downdraft
carburetor produces the fuel and air mixture to supply the cylin-
ders.
The engine
is
equipped with battery
ignition.
The spark advance is
controlled
automatically by a
vacuum
mechanism.
The oil pump of the full pressure lubrication system is driven by the cam-
shaft and sucks the oil from the crankcase through a strainer and pumps it
to the various lubrication points via an oil cooler. In cold weather, when the
oil is
thicker, an oil pressure relief valve makes it possible for the
engine
to be
lubricated
directly, that is, by avoiding the oil cooling system.
The air cooling of the engine is done by means of a fan, which is attached to
the generator shaft and driven by an adjustable V-belt.
The
generator pulley
is
adjustable to permit adjustment of belt tension.
T
he fan sucks in air
through an opening in the fan housing, and the air cools the engine by pass-
ing through the cylinderfins.
A
thermostat controls and regulates the amount
of cooling air
and
ensures
well-balanced
operating and heating temperatures.
63
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