New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1917-04-15
When Your Motor.
Smokes 1t Cost,
More than a Fin.
You're Burning Either 7.
Much Fuel or Exce..
sive Oil
Clouds in Three Colon
What They Mean and Ho.,
Overcome Them Told BY
Motor Expert
By II. c. BROkAM.

sources burning TOO much rw,..
or using too much lubrica,iny !,
usually tho latter. Excessive a.
gasolene comes from faulty esrhu,...
adjustment or poor design Of -.
burctor, or intake manifold, Or ,,,
ing the engine cylinder a. too l,,,
temperature, because OF the vs,., \.
ing too cold in the cooling system.
In tho latter case the earbuve..
may vap-t'ze the gasolcne pcvt,,,
bat il condcnses IN the cylinder A.,
does not burn well and the par. VIA
. is no. consumed passes Of as kl,,,
smoke, which issues from the sxh,,,
! pipe.
We must nave certain smoar. =
oxygen TO consume the gasol.r. ..
tirely. The lie OF the cylinder lin
the amount Of air from which a,
oxygen Is tfken) which may b. ,sir
in, and if the carburetor Is adjust,
to feed too much gasolene there rr
not be enough oxygen present to e..
sumo it all. Practically speaking, v.a
is not consumed forms carbon y
smoke.
The obvious remedy Is to supply hu
to the ingoing air at the mixing ehs--
Der of the carburetor so that varsn-
cation will be complete, or sdjus. q,
carburetor so that no more gssos,,
will be fed TO the engine than d ~.
CURED for running This latter. d,
course, is the economical thing 70 DO
a light blue smoke coming frcn u,
exhaust pipe indicates too much lrsn-
eating oil. This may be due to festiy
too much oil or TO running the err.
a great deal with the throttle rsrly
closed. In order to draw charge 4
gas into the cylinder the piston taas
partly out of the cylinder aud fcr-i
vacuum. With the throttle wide spc
a high vacuum is not obtained, bscsgs
large amount OF saso.ene sndsir 3
allowed TO come in and iill the eylint,,
The engine is throttled down BY &c,
ing the throttle 80 that the air al.
not get in En- such o large quantity
conseaentlv there is a decided vaess-
in the cylinder on each intake str'a
Of the piston. This vacuum has W.
dency 20 draw oil up pass the pnies
into the combustion chamber. vstr !
burns and forms smoke. Ih his IS ny
when the machine is left al n, es's
with the engine running for any lergn
of time il will often be found TO star
away with clouds OF smoke iSsas
from the exhaust.
In the same way, when the engine
running slowly air passes through ~
carbure:or so slowly that the gasor'
is not broken up into very Tine PARE
consequently II does not fully vaFs
ize and Is very easily CONDENSED >
forms liquid gssolene IN the ihnn
nine or cylinder. This IS eA.e
loading up and is responsioe "
black smoke when the machine
started. 49,, 4. .
one way Of overcoming this !, ,
supply a larger amount OF neat y.
usual to the mixing chamber ~
carburetors are not designed 70 az
care of this condition, and the ny
remedy would be 20 stop the eng.
instead of allowing il to run VI"
standing at the curb. a.. -
To overcome smoke from ne :.
which is drawn up past the pnso. Z
is customary 10 have a grooVs VI. ",
in the piston under the lo"er pl,N I,
ring. with five or six holes driis.r =. /.
the groove through the piston; 49,.
niston ring then scrapes the Oh "
the cylinder wall into the groovs 4, 4.
bacL into the crank case tnrousi -
niston walls. This prevents ~.
working I'D into the combustion 60
her. MANY manufacturers 90 %. |.
the very new models, and repani ~
do il regularly on old modeH '"S
models which do not have IL .u-.I
Sometimes the oil level viii oe a., -,
foo high. This may be correcHc ~
bv lowering the oil troughs or 4,
inc Oft the dip on the bottom @ss
connecting rod so that II barely S
the oil or touches IL with nA''
surface. -. ,.rlsti
from too much gasolene OF q, .slx
is a large amount OF caroon e.r .,s 3
in the cylinder which taxes " a.,
The combustion chamber and rs 'sIss
comnression so high that pre- A
occurs and the engine knocks az
must then be taken 10 repair ~ =.
havo the carbon burned or serspsa - 4,
M H - eynensive work. and beslaa =
car is laid Up and one loses n
while the scraping Is being oon. .,s:S
ou,ner will see that he has oeen ~
ing q lot Of money TO supply sss ~
and oil that he didn't need 70 .,r..s
10 make smoke and carbon anu W
and that he is out all around, "
smoke should not be eonta'.s,,
steam which issues from the !,
nine in cold weather. one
products OF combustion IN tne .,
a;ne ia water. natural resul. " NJ
breaking up Of a hydro -eaipv ..~,,,s
usually passes of at a hign r.. 81
t nsrs' as an Invisible ysPOr. u. y 3
Weather YEA it condenses inimssiss,' !,
strikes the air and is 'ls''p alJs
form of what we call steam
Is T r tTs orr do not let the psn. .s .
take YOU in for having a snhon ~
cine when IL is only steam isssy rs
which il is you probably can 90 10
him By the color. II it IS :, sA, Ssss,sIsy
smoEe, and II il is light blue . f 4
s nose from rom the labricating OIL u, ' .s,r
fore watch your exhaust ;us. -
are many eyes watching -!
in parks and city streets