Evening star., 1925-04-26
Increased Engine Efficiency
Being Sought by Car O,uners
Turning to Ne,O Devices That Mean
Clean Air, Fuel and OiI-Wide
Variety of apparatus Offered.

within the past six months that many
engineers are turning their attention
to ways and means of keeping raw
gasoline out Of the engine. Apparently
it is not enough in the efficiency line
to have the raw gasoline rectified
from the crankcase and returned to
the engine as fuel, as is done on one
make. The engine of the near future
must not even subject the pistons
and cylinder walls to wear during
those few eventful moments of start
ing.
When the average engine starts
there is a rush of raw gasoline to
the cylinders. This is in the form of
a spray and not SO much trouble fol-
lows if the engine happens to go off
promptly. But after a stall or too
and too much choking the vapor
promptly condenses on the piston
head and cylinder walls, leaks down
past the rings and cleans off what
ever oil happens to be on the parts 1t
passes. This means that the next
few moments OF the engines life will
be run off without sufficient lubri-
cation.
This has led to the adoption by
several manufacturers of electrical
pre-heating devices under various
names. The theory in each case is
to so vaporize this early spray that
it will not readily condense when it
strikes the cold cylinder walls. A
double advantage is had by reason of
the fact that the engine is much more
likely to fire promptly on more
normal mixture.
Seek Carbon Curb.
Not content with cleaning the air,
straining the gasoline of impurities,
rectifying the gasoline in the crank.
case and purifying the oil in the
crankcase, engineers have already
turned their attention to the possibil-
ity of automatically eliminating what
ever carbon forms in the engine. Re
gardless of the work of keeping the
engines diet free from foreign mat
ter, it is found that burning fuel
means forming ashes. When gas
vapor Is burned carbon is the result.
The less dirt there is in the engine
the less opportunity there is for this
residue to cling and thus to remain
in the engine, but even in the clean
est of engines some of IL remains.
Thus there has come into use devices
for feeding a little water or a little
special oil to cylinders while the en-
gine works.
The idea is to loosen up any carbon
liidI SOliCIto VI W SOIiNc IL lIIlO Sd-5
And these devices that employ oil also
aim to keep the valve stems from
getting too dry or sticky, function
which does not come under the
province of the oil purifier or the air
cleaner.
With all of these devices and little
intelligence in operating the car it is
said that the average engines life can
be more than doubled. Carbon knocks
vanish. There is no oil dilution, no
appreciable bearing wear, no piston
slaps, no valve grinding, no carbon
cleaning, no loss of power, no Difficult
ty in starting, no sticky valves, no oil
pumping, cylinder reboring or piston
ring replacement. Moreover, all of
these devices can be added to the car
for less than 500.
More miles TO the engine will mean
more dollars in the car owners pocket
and more service from the average
automobile. The opinion seems to be
that the efficiency devices are going to
be the rectifiers of car ownership and
the custom cleaners.
(Copyright 1921