Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1920-09-26
|sIMPl|F|ED LESSONS IN
CARE OF AUTOMOBILE
Frederick G. Gucrrlich Delivers
@ Lecture on Gasoline Feed
Systems.
BY FREDERICK &. GUERRLioh'
s fsE.y'-'st NJ. T..
lecture c11.
Gasoline Feed SystcmS.

lecture Eli.
sfFF Gasoline Feed Systems.
&iln the last lesson we saw now inc
carburetor does Its work. lie. US
THE carburetor.
sgffTherc arc two ways Of placing the
gasoline supply tank; namely. higher
than the carburetor, as unae, the
car, where ii VIII be lower 'hah '"o
4 carburctor. T.,
There is practically no problem IN
feeding the gasoline 70 inc ,han i, "a
the gasoline will simply now 10 IL
by gravity. 1t Is. however. often
necessary to make the manifold YER!
long, so as 10 get the carouretor low
enough. thus increasing the ten
{ dancS 10 condense. Sometimes when
!. tho car is going up hill ana wmeh
the tank is nearly empty me. me c az
burctor will get higher than inc
level Of the gas in the tank, and OF
course the gas cannot get to me
{ carburetor, This often happens ana
when it does, the thing TO 90 Is ~
turn around, and SO up the NH
Where the tank is placed in tn,
Z rear, which is often done. because OF
the convenience of filing anu pecau US,
{ OF the better balance of the car
which Is obtained thereby. the lever
of the gasoline will be lower than
{ tho carburetor. There VIII, therefore,
( haveN to be some means t"i hiSHS
forcing the gas uD to this hisher
This IS. done in two ways: namely.
blythe pressure feed system, and ps
the vacuum system; the latter, nov"
The Pressure Feed System.
The drawing shows the layout OF
pressure feed system. III the .anm
"a" be made air tight ana AR men
DO forced into it under pressure. nc
air will press down on every square
tnch Of the surface OF the hqu;i. anu
so force the liquid to flow M through
the pipe ~" and thus up to the car
buretor.
1.-TWO methods are used 10 get inc
air pressure: namely. by 4 pump
driven from the engine. usually from
. EXHAUST gases OF the engine still have
n Ssmall amount of pressure, is
utilized. BY screwing pipe into the
exhaust pipe little Of the gases
4 can be used they first being screened
and passed through regulator valve
4, which will keep the pressure IN the
tank always the same.
rho pump used varies in design. In
some cases the last valve inter- nno
e its guide also act ms the pump The
Il pump usually has means Tor reGu,
! iating the amount OF air which l. VIII
4 pump. ,,,o ,,-
i n while the pressure will leak out OF
tho tank. and so some method must
be. furnished to get the pressure in
Z the tank for starting, as the engine
driven pump will work only when inc
( engine is running. Fog, this purpose
hand pump is furnished. 1t being
placed In some position convenient TO
the driver. as on the instrument
board. or the front board OF the
This pump usually has a valve
placed Mt it's mouth, which valve can
Z be turned so as to connect the pump
Ut J,
wduid be its position when PREPARING
to Nstart or when pumping-it can
be burned so as 10 disconnect the
pump and the piping. OF really shut
Il off the piping from the pump-which
would be the position when running
and Il can be turned so as to let
the pressure escape from the tank.
AS II is desirable TO know what
gauge is usually connected to the
piping and placed on the instrument
& board.
Let US go over the Illustration and
Il to start. the lever tx" Is turned SO
Z that the pump valve is In the pump
ing position. and then air is pumped
by moving the handle "E" back and
6 pounds. When there are two pound:
Z pressure in the tank the engine car
d be started. and the engine driver
pump will then pump air into The
-
/ which has gone 10 the carburetor.
Note, that when pumping. the ali
s, can go to the tank through the pip,
90" or TO the gauge through the
:. pipe 20" and that the cnginc-driver
pump also is connected by the "P'
I TO both the tank and gauge.
b53 The great fault with this system Il
| that it is difficulty 10 keep the ali
from leaking out. Ehe filler cap ~
II being the greatest place OF leakage
4 This fault led 10 the invention o. tn,
vacuum system, which is now usct
lson most cars.
Most cars when equipped witt
II either, the gravity or pressure fec
have trap" 10 catch an,
ff water. placed in the pipe lin,
B near to the carburctor. In time, con
3 siderable water will gather in this
tlFso that the plug or pet cock at tn
n sbottom OF it should be opened peri
odicaliy and about cuptul o. Tn
TX liquid be allowed TO flow OUT,