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Патент USA US2105699

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Jan. 18, 1938.
w, M, FATE
2,105,699
MONOVALVE CYLINDER HEAD CONSTRUCTION
‘
Filed Jan. 11, 1937
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Inventor
‘jzyzjvaéev
Bygéumw?zwu
vi;
_,
.4 iiorneys
Patented Jan. 18, 1938
2,105,699
_ UNITED STATES
PATENT OFFICE
2,105,699
MONOVALVE cYLlNgllgR HEAD CONSTRUC
N
Walker M. Pate, New Orleans, La., assignor of
one-half to Thomas F. Boyle, New Orleans,
La.
Application January 11, 1937, SerialNo. 120,082
9 Claims. (Cl. 123-79)
This invention appertains to new and useful ternal combustion engine constructed in accord
improvements in the art of internal combustion ance with the present invention.
engines and more particularly to a novel cylinder
Figure 2 is a fragmentary vertical sectional
head construction of the single poppet valve ex
view taken substantially on the line 2-2 of Fig
5 haust and air admission type.
ure 1.
In this type of exhaust and air admission con
Referring to the drawing wherein like nu
trol, a single valve, usually of the poppet type, merals designate like parts, it can be seen that
is employed for permitting exhaust of the prod
numeral 5 represents‘the usual cylinder block
ucts of combustion on the exhaust stroke of the having the bore 6 therein receiving the piston 1.
10‘ piston, and also admission of air during the suc
Numeral 8 denotes the novel cylinder head con
tion stroke of the piston.
struction in which the combustion chamber 9 is
Numerous patents have been issued along this located. It will be observed that this combustion
line with the aim in view of utilizing a single chamber 9 is of frustro-conical shape having the
_ passageway having an intermediate portion com
poppet valve seat ID at its upper end. As this is
municating with the combustion chamber of the a mono-valve type cylinder head construction the
cylinder at the port of the single valve, to the port at the top of the combustion chamber 9 is
end that air will be supplied to the combustion the only communication between the combustion
chamber from one end of the passageway, while chamber and the air admission and exhaust pas
the products of combustion will be expelled sageway construction generally referred to by
20 through the valve port toward the opposite end reference characters lI-l2. An air supply tub
of the passageway.
ing l3 connects to the inlet end of the air ad
mission side H of the passageway, while the ex
The attempts heretofore to control the admis
sion of air and to exhaust burned gases in a haust tubing or conduit 14 connects with the out
mono-valve type engine, with a single passage
let end of the exhaust side l2 of the passageway.
25 way for air admission and exhaust, have been
It can be seen in Figure 1 that the air admis
met with only mediocre success, due to the so far sion side I l of the passageway is substantially on
unsolved problem of keeping the exhaust gases a horizontal plane, with the inlet end a lo
from exhausting into the air supply side of the cated a substantial distance below the outlet end
single passageway, without the employment of b of the exhaust side l2. Furthermore, it can be
30 supplemental valve mechanism for this speci?c seen that the exhaust side of the passageway is
purpose.
substantially in the form of a curved elbow hav
The principal object of this invention is to ing the inner end of the air admission side ll
provide a single valve cylinder head construction communicating with its lower end just above the
wherein the single air admission and exhaust valve port of the combustion chamber 9.
To effect an arcuate sweep of the air, through
35 passageway is constructed in such a manner as
to preclude the exhausting of the products of the air supply side ll of the passageway, the top
combustion into the air admission side of the portion 0 of the air supply side of the conduit
passageway, and this without the employment is curved downwardly toward the combustion
chamber port and to maintain the cross sectional
of any movable mechanical parts; and further
area of this portion I l of the passageway
40 more to relate the air admission side of the pas
sageway with the exhaust side of the passageway throughout the length of this portion, the air ad
mission portion ll of the passageway gradually
in such a manner as to cause a de?nite direc
tional movement of the air supply from the air increases in width while decreasing in depth until
supply side of the passageway to the valve port, it merges with the ovate ori?ce I5 at the inner
45
when the valve is in open position, and into the end of the air admission side II, that is, where
exhaust side of the passageway, only when the the air admission side of the passageway merges
valve is in closed position to clear and cool the with the lower end of the exhaust side l2 of
the passageway. This affords a lip Ha which
‘exhaust side of the passageway.
serves to de?ect air across the adjacent end of
Various
other
important
objects
and
advan
50
the exhaust tube l2 and directly into the port l0.
tages of the invention will become apparent to However, it will be noted that the speci?c pur
the reader of the following speci?cation.
pose in having the combustion chamber 9 of
In the drawing:—
frustro-conicial shape is so that the exhausting
Figure 1 represents a fragmentary vertical sec
gases will be directed exclusively into the exhaust
was tional view through the upper portion of an in
side l2 of the conduit. With this in mind, it can
10
15
20
40
55
2,105,699
be seen that the ori?ce I5 is located in the offset
wall portion 01 of the lower end of the exhaust
side I2 of the passageway so that as the burned
gases are exhausting they will shoot upwardly
through the exhaust side I2 of the passageway
without entering the side II. Immediately on
the intake stroke of the piston 1 air in passing
through the side II of thel’passageway ‘will be
guided in such a manner as to describe a slight
10 are which will ?nd its inner end entering the
port of the combustion chamber 9.
When the valve I6 is .in closed position of
course air passing through the side II of the.
passageway will be shunted upwardly through
15 the side I2 of the passageway for the purpose
of clearing the passageway and cooling the valve.
Figure 1 also shows the usual stem II of the
valve I6 which operates through the‘ guide I8,
which guide is mounted in the guide boss I9.
20 The upper end of the stem I1 is engaged by
.the usual valve rocker 20 and a spring 2| is
provided on the stemfor holding the valve IS in
seated position.
'
I
Numeral 22 represents the usual fuel injector
for the combustion chamber 9.
. ,
It will furthermore be observed that the prod~
nets of combustion in escapingthrough the pas
sageway I2 will draw air from conduit I3 into
the said passageway to aid in the cooling of the
exhaust gases. Moreover, the ?ow of air is con
burned products of combustion well into the ex
haust passageway and beyond the adjacent end
of the air supply passageway.
4. In a mono-valve cylinder head construction,
a combustion chamber having a valved port, an
exhaust passageway extending coaxially from the
port and delivering the exhaust to an outlet adja
cent that'part of the cylinder head remote from
the cylinder, and an air supply passageway open
ing into the exhaust passageway adjacent the
port, said air supply passageway being con
structed and disposed to deliver air directly into
' the port, the port end of the exhaust passage
way being provided with a lateral pocket into
which the air supply conduit opens, said com
bustion chamber being of upwardly tapering con
struction so as to guide the exhaust gases well
into the exhaust passageway so as to avoid the
adjacent end of the air supply passageway.
5. In a mono-valve cylinder head construction, 20
acombustion chamber having a port, an arcuate
air supply passageway constructed adjacent and
arranged to deliver a flow of air immediately into
the port, a valve for the port,-and an exhaust
passageway into which the air, passageway opens,
said exhaust passageway extending coaxially
away from the said port, and delivering the ex
haust to an outlet adjacent that part of the
cylinder head remote from the cylinder.
6. In a'mono-vaive cylinder head construction, 30
a pair of arcuate-shaped passageways, a combus
stant, passing through the entire passageway
when the valve is closed, incidentally cooling the
valve, and passing through to the combustion
tion chamber having a valved port with which
chamber when the valve is open.
mergingtogether with their meeting point de
,
the passageways communicate, said passageways
While the foregoing speci?cation sets forth the
invention ‘in speci?c terms, it is to be understood
scribing an air deflector offset laterally from the 35
that numerous changes in theshape, size and
material may be resorted to without departing
one vof said passageways.
from the spirit and' scope of the invention as
40 claimed hereinafter.
Having described theinvention what is claimed
' as new is:—
-
1. In a mono-valve cylinder head construction,
a combustion chamber having a valved port, an
: exhaust passageway extending coaxially from the
- port and delivering the exhaust to an outlet adj a
cent that part of the cylinder head remote from
the cylinder, and an air supply passageway open
ing into the exhaust passageway adjacent the
port, said air supply passageway being con—
structed and disposed to deliver air directly into
the port.
'
2. In a mono-valve cylinder head construction,
a combustionvchamber having a valved port, an
exhaustpassageway extending coaxially from the
port and delivering the exhaust to an outlet adja
"cent that part of the cylinder head remotefrom
the cylinder, and an air supply passageway open
ing into the exhaust passageway adjacent the
port,’ said air supply passageway being con
structed and'disposed to deliver air directly into
the port, the port end of the exhaust passageway
being provided with a lateral pocket into which
the air supply conduit opens. '
3. In a mono-valve cylinder head construction,
> a combustion chamber having a valved port, an
exhaust passageway extending coaxially fromgthe
port for de?ecting air directly into said port from
7
7. In a mono-valve cylinder head construction
comprising a combustion chamber having a port
with a valve for said port, an exhaust passageway
having its inner end coaxial with the valve stem
and enveloping the said port, an air supply con
.duit opening into the said exhaust passageway
adjacent the port in laterally offset relation to
the axis ofthe said port.
8. In a mono-valve cylinder head construction
comprising a combustion chamber having a port
with a valve for said port, an exhaust passage
way having its inner end coaxial with the valve
stem and enveloping the said port, an air supply 50
conduit opening into the said exhaust passage
way adjacent the port in laterally o?’set relation
to the axis of the said port, the top portion of
the air supply passageway being curved longi
tudinally and converging with the bottom por
tion of the passageway to cause the supply of air
to sweep into the lower portion of the exhaust
passageway and directly into the said port.
9. In a mono-valve cylinder head construction
comprising a combustion chamber having a port to
with a valve for said port, an exhaust passage
way having its inner end coaxial with the valve
vstem and enveloping the said'port, anair sup
ply conduit opening into the said exhaust pas
sageway adjacent the port in laterally offset re 165
lation to the axis of the said port, thetop por
tion of the air supply passageway being curved
longitudinally andconverging with the bottom
port and delivering the exhaust to an outlet adja
cent that part of the cylinder head remote from portion of the passageway to‘ cause the supply
the cylinder, and an air supply passageway open ' of air to sweep into the lower portion of the ex-‘
ing into the exhaust passageway adjacent ‘the haust passageway and directly into the said port,
said air supply passageway gradually increasing
port, said air supply passageway being con
structed and disposed to deliver air directly into in width inwardly so as to maintain a constant
the port, said combustion chamber being of up
"75. wardly taperingconstruction i’or delivering the
5.0
cross sectional area throughout its length . ,
'
WALKER M. ‘PAT-E.
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