, 1923-03-29
AIR CLEANER PREVENTS DIRT REACHING "CARBURETOR
OF ~RIGRENBACKER ENGINE, INCREASES EFFICIENCY

Equipment which contributes to /
maximum motor efficiency is found
in the air cleaner through which air
is fed to the carburetor Of the engine.
and the device USED on the Ricken
hacker engine has been the center of
interest for many visitors al the
Automobile show.
Air Cleaner.
The carburetor has been equipped
with the new hot air stove n air
cleaner which has been found to be
very efficient. It is a device for re-
moving particles OF foreign matter
from tho air taken through tho car
buretor into the engine, a feature
which Is Of inestimable value to the
users OF automobiles. Tho idea of
taking the dust and sand out of the
air going into the cylinders has not
been overlooked by a number Of
manufacturers in lines other than
automobiles. though only one other of
the latter use n cleaner as standard
equipment. Practically all air com.
pressors are so equipped and no farm
tractor. to u knowledge. is made
which is not equipped with some type
of air cleaner. Likewise. many trucks
are supplied with some such device.
The fact that the makers of air
compressors and tractors have found
1t necessary to use this device proves
conclusively that an automobile en-.
CINE will give better service at less
cost when SO equipped. Dust enter.
ing the cylinders Of an internal com.
bustion engine causes the formation
OF carbon, wear OF rings, pistons,
cylinder walls, bearings, oil pump,
and all fabricated parts, as the fine
particles pass through the screens
and change the luhricatlng oil into
a tapping compound. The sole pur-
pose Of the cleaner is TO prolong the
life Of the motor and insure uniform
performance. Most cars operate well
when new; the number OF miles ser
vice given and the speed performance
depend on how well the parts are
protected from or resist wear. AS
the life Of any car is practically con-.
' trolled by the life Of the motor. pro.
lection should be provided for its
parts.
BY actual test, meterlng the air,
It has been shown that an automobile
consumes nearly twice its own weight
of air in ten hours at 90 miles per
hour. II each cubic foot contains one
grain Of dust there would pass
through tho cylinders OF a car weigh.
ing $500 pounds, Approximately one
pound OF dust per hour. As to the
quantity Of dust suspended in the
atmosphere, this of course varies
greatly. It has been shown by an
apparatus invented by Air. Aiken in
1880. that the cleanest air ever found.
contained 16 dust particles per cubic
ccntimeter. and in cities the number
was found to be as many as 100000
per cubic centimeter. There are
3l5, 900 cubic centimeters per pound
of air, or 20 billion dust particles per
pound of air. When dust can be seen
suspended in the air, the above pro
portion is undoubtedly small. Analy'
sis has shown as high as 90 per cent
of the carbon deposited on cylinder
and head walls to be sand.
Tho cleaner Will increase the life OF
the engine and reduce repair. gaso-
line, and oil bills. Tractor records
Indicate the average saving Of all
three items as from one-half to three
fourts. In other words, IL the cost Of
uUhEGU QAA a AAaAhGA AAAbNbA a. " Nt~
equipped with an efficient cleaner.
then the cost without tho protection
VIII be from two 10 three dollars.
Results Of tests made on this
cleaner by government engineers in
the Detroit laboratory. arc as follows:
nineteen tests were made puttins
through the cleaner each time 100
grams of tho fine dust as though sus'
pended I'm tho air. The highest ell
cheney obtained was 100 per cent. y
nexlble suction tube was used with
a short band in the path Of the dust
and the small incff~icioncies recorded
arc undoubtedly accounted for by
h leakage OF the joints in this tube
The lower efficiency obtained was
o9.51, showing n loss Of less than one
seventh Of the best results In similar
tests of a competitive cleaner which
had previously been tested and found
10 be the best in its class. The ave.
age of the ten lowest efficiencies was
a9.7. a loss OF less than o~ne-twentieth
Aof the best competitive average, The
average OF the ten best ~efficiencies
was 1851. a loss Of less than one
sixtieth Of the best competitive aver
ages. Engine speeds were varied
from 400 to 1900 II. p. NJ"
The leane used to date usually
arc of such construction that they
retain the dust removed from the'nlr
within their mechanism, n IL 10
therefore necessary 20 clean out ms