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Патент USA US2118633

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May 24, 1938.
H. S. WHITE
INTERNAL .cbMBUsTIoN ENGINE
Filed April 28, 1936
?MNTII?I?
27
25'
"V.
2,118,633
Patented May 24, 1938
UNITED STATES PATENT OFFICE
2,118,633
INTERNAL COMBUSTION ENGINE
Harold S. White, South Bend, Ind., assignor to›
The Studebaker Corporation, South Bend, Ind.,
a corporation of Delaware
Application April 28, 1936, Serial No. '76,770`
5 Claims.
(CI. 123--119)
This invention relates to internal combustion
engines and particularly to means for ventilat
ing the crank case thereof, one of the primary
objects being to utilize the vacuum in the intake
5 manifold for drawing the fumes from the crank
case when the engine is Operating at part throttle
opening.
Another object is to provide a vent leading
from the crank case to the intake maniiold to`
10 provide lubrication of the cylinder above the
piston.
Another object is to provide positive círcula«
tion of the fumes in the crank case to. eliminate
condensation of moisture ther-ein,` thus permit
15 ting easier starting of the engine in cold weather.
Another object is to provide a passageway in
the valve stern guide to connect the engine fuel
intake chamber with the crank case whereby
the vacuum in the intake chamber will draw the
fumes from the crank case and carry them into
O the engine combustion chamber on the suction
stricke of the piston.
Other objects, and objects relating to details
of Construction, methods of manufacture and
i
“
methods of operation will be apparent from the
drawing and the detailed description to follow.
proper lubrication. I have eliminated, at least to
a large extent, the con'densation of the moisture
in the crank case by drawing the fumes. there
from while the engine is in motion and carrying
the ?umes into the combustion space in the 5
engine. Enough lubricant is carried with the
fumes to properly lubricate the engine cylinder
above the piston so that I have obtained the
triple advantage of eliminating crank case lu
bricant dilution, the lubrication of the engine 10
cylinders, and improved carburation in starting
the engine because of the moisture drawn into the
combustion chamber.
In order that those skilled in the art may bet
ter understand the purpose and advantages of 15
my invention, reference will be had to the ac
companying drawing and referring ?rst to Figs.
1 to 3, inclusive, I have illustrated an engine
cylinder block II) having a cylinder head ll at
tached to the upper face thereof by the cap
screws !2. The engine may be of the single 20
or multiple cylinder type and includes an in
take valve !3 movable to open and close the open
ing into the combustion chamber hi in the cyl
inder head H which communicates with the cyl- 25
inder !5 having a piston !6 reciprocating therein.
In the accompanying 'drawing which shows
The engine intake port I'? communicates with
two suitable embo?diments oi my invention and in
the intake manifold !8 which may be of any
desired shape and to which is attached the car
which like numerals refer to like parts through
30 out the several views:
Fig. 1 is a fragmentary side elevational View
of an engine showing one form of my invention
included therewith;
Fig. 2 is a detailed sectional view taken on
3 a the line 2-2 of Fig. 1 showing a portion of the
engine, the intake manifold and the tube leading
from the manifold to the engine crank case; and
Fig. 3 is a detailed sectional view taken on the
line 3-3 of Fig. 1' showing a portion of the
gm* engine crank case, the breather tube therefor
and the connection from the tube leading to the
intake manifold.
Considerable diñiculty has been experienced
with co-ndensation of moisture in the crank case
45 of the engine, particularly in cold weather, which
has caused ccnsiderable trouble in the starting
and successful operation of the engine. In some
cases it has been found that the condensation
of the moisture in the engine crank case col
50 lects around the oil pump so that the frozen
Water prevents its operation and the lubricant
will not circulate to the respective bearings thus
making it extremely di?icult for the operator
to start the engine and also considerable damage
55 has been done to the engine because of the im
buretor !9, a portion only of which is illustrated. 30
The engine crank case 20 has an opening 2l
therein to which is ?tted the end 22 of a breather
tube 23 which is Secured thereto by the bolt 24
as is best illustrated in Fig. 3. During the op
eration of the engine the crank shaft thereof 35
will cause the lubricant in the crank case to be
agitated so that the fumes' arising therefrcm
may pass out through the breather tube 23.
rPhis vent has been found not to be sufiiciently
effective at low engine speeds and in cold 40
weather to Carry away the fumes from the crank
case and to assist in this operation I have prc
vided a tube 25 terminating in a coupling 26
?tted into the breather tube 23 in the upper face
as shown in Fig. 3. The opposite end of the 45
tube 25 is Secured in a coupling 21 having a com
munication with the passageway 28 formed in the
intake manifold !8. The passageway 28 in the
intake manifold !8 is preferably positioned at
a low level thereoi so that any unvaporized fuel 50
in the intake manifold may ?ow into the tube
29 Secured in the coupling 28 in the side oppo
site to the tube 25. The tube 29 is provided
with a check valve 30 operative to close when
the engine is running and open when there is 55
2
2,118,633
no vacuum in the intake manifold to permit dis
charge of the unvaporized fuel collected in bot
tom of the intake manifold.
The construction which I have illustrated is
particularly adapted for use in automotive ve
hicles and the breather tube 23 preferably has a
tapered free end 3l sloping away from the normal
forward travel of the vehicle as indicated by the
arrow A in Fig. 1.
10
When the vehicle is traveling
at low speeds or when the engine is running at
a relatively low speed there may be a tendency
for the air to travel upwardly in the breather
tube 23 into the crank case 20 and to eliminate
such a possibility I have illustrated a valve 32
15 which is adapted to close the opening in the
breather tube 23 in the event air tends to travel
upwardly therein but which will open and per
mit the crank case fumes to travel outwardly
therefrom. When the vehicle is .traveling at a
20 relatlvely high speed there will be a small vac
uum at the end 3| of the breather tube 23 which
will tend to draw the fumes from the crank case
to thereby assist in cleaning .the same from mois~
ture. It is also evident that when the intake
valve |3 opens the combustion chamber M to the
intake passage IT and on each suction stroke of
the piston IS that the vacuum in the intake
manifold will draw the fumes from the crank
case 20 and Carry the same with the fuel mixture
30 into the engine cylinder |5 to lubricate the cylin
der above the piston. It will also be evident
from an inspection of the drawing and the de
scription to follow that at low engine speeds
When there is a greater vacuum in the intake
manifold, the connection from the crank case
to the intake manifold will be most effective in
drawing the fumes from the crank case. This
arrangement is therefore effective to carry away
the crank case fumes when the breather tube is
40 least effective so that at all times dilution of the
lubricant and condensation of moisture in the
crank case is eliminated.
While I have shown only a preferred embodi
ment of my invention it will be understood that
45 changes which would occur to those skilled in the
art and changes resulting from methods of man
ufacture and details of Construction may be re
sorted to without departing from the spirit and
substance of my invention, the scope of which is
to be measured entirely by the sub-joined claims.
I claim:
`
1. In combination with an internal combustion
engine having a cylinder, a piston therein, a fuel
mixture intake port communicating with said
cylinder and a crank case adapted to contain a
lubricant, of a breather tube having its upper
end secured to the side of said crank case pro
viding an outlet passageway from the latter and
having a rearwardly exposed opening at its lower
GO end and shaped to cause a partial vacuum at
the end of the tube when the engine is running
at a relatively high speed to draw fumes from
said crank case, and a tube connected at one end
the fumes from the lubricant in said crank case
are drawn into said intake port and cylinder upon
the suction stroke of said piston.
2. In a vehicle, the combination with an in
ternal combustion engine having a crank case CI
with lubricant therein, a cylinder, and an intake
manifold connected with said cylinder, of means
for preventing dilution of the lubricant in said
crank case and condensation of moisture therein
comprising a breather pipe connected at its upper 10
end to said crank case and having an open lower
end subject to negative pressure in accordance
with vehicle movement, means in said breather
preventing ?ow of ?uid upwardly therein, con
duit means connected between the upper end of
said breather and said manifold for drawing
crank case vapors into said cylinder upon the
suction stroke thereof, and suction controlled
valve means for draining said manifold and con
duit means upon stopping of said engine.
20
3. In a vehicle, the combination with an in
ternal combustion engine having a crank case
with lubricant therein, a cylinder, and an intake
manifold for said cylinder, of a breather tube con
nected at its upper end to the upper portion of 25
said crank case and having a rearwardly opening
lower end subjecting said tube to negative pres
sure in accordance with the rate of movement of
sai-d vehicle, a conduit connecting the upper part
of said breather tube to said manifold, and a 30
valve in said tube normally urged into position
to prevent updrafts therein.
4. In a vehicle, the combination with an in
ternal combustion engine having a crank case
adapted to contain lubricant, a cylinder, and an 35
intake fuel conduit therefor, of a breather tube
connected to the upper end of one side of said
crank case and extending downwardly below said
engine, the lower end of said tube having a rear
ward opening whereby negative pressure is pro 40
duced in said tube during rapid forward move
ment of said vehicle to draw fumes from the
upper part of said crank case, and a suction con
duit between said intake conduit and the upper
end of said breather tube for drawing fumes from 45
said crank case into said cylinder upon slow speed
movement of said vehicle or when said engine is
Operating and the vehicle is stationary.
5. In combination, in a vehicle an internal
combustion engine having a depending crank 50
case adapted to contain lubricant and having an
intake manifold for the cylin-ders of said engine,
said crank case having an opening in one side
thereof adjacent the top thereof, a breather tube
having a laterally extending inlet secured in said 55
opening and having a downwardly extending
tubular portion provided at its lower end with a
rearwardly directed outlet, a second outlet tube
connected to the top of said tube and leading to
said manifold, whereby said_ inlet is subjected to
suction to draw fumes from said crank case in
accordance with the suction created in said cyl
inders and the forward speed of said vehicle.
with the upper end of said breather tube and at
its opposite end with said intake port whereby
HAROLD S. WHITE.
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