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Патент USA US2408892

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get. 8, 1946.
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‘T. P. SOPROUNOFF
'
2,403,890
INTERNAL- COMBUSTION ENGINE
Filed July 8, 1945
2 Sheets-Sheet 1
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INVENTOR
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ATTORNEY
i» 3» 1946.
2,408,890
1r. P. SOPROUNOFF '
INTERNAL-COMBUSTION ENGINE
Filed July 8, 1943
2 Sheets-Sheet 2
P I G. 9
.56
58
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55
PIGM 1716.12
ZIHEODOREB SO-PROUNOFF
INVENTOR
BY
‘2,408,890
Patented Oct. 8, 1946
UNITED STATES PATENT OFFICE
2,408,890
INTERNAL-COMBUSTION ENGINE
Theodor P. Soprounoif, New York, N. Y.
Application July 8, 1943, Serial No. 493,814
7 Claims.
1
My invention relates to internal combustion
engines and has particular reference to engines
having Variable strokes.
One object of my invention is to utilize the dif
ference of pressure of compression, explosion
and working pressure in the cylinders, providing
the pistons with simultaneous additional relative
. movement, which automatically varies the stroke
(01. 123_55)
2
companying speci?cation and drawings in which:
Fig. 1 is an elevational view partly in section
of a four cylinder double opposed engine;
Fig. 2 is a transverse sectional view of the
same;
Figs. 3 and 4 are detail views of an eccentric
sleeve for the crankshaft;
Fig, 5 is an elevational View partly in section
in one cylinder in which compression takes place
of a multicylinder engine with a single eccen
by varying the stroke in a preceding cylinder
in which the piston is driven by the force of ex
trio;
' plosion.
I accomplish this purpose by providing
Fig. 6 is a transverse sectional view of the
same;
Figs. '7 and 8 are detail views of an eccentric;
a free bushing on the crankshaft of the engine
Fig. 9dis an elevational view partly in section
with eccentrics so arranged that the bushing
of a modi?ed multi-cylinder engine;
takes a variable position in relation to the shaft
Fig. 10 is a transverse sectional view of the
depending on the relative strength of the forces
same;
acting on the eccentrics. The bushing provides
Figs. 11 and 12 are detail views of the eccentric
therefore a ?oating connection between the two
for the engine shown in Figs. 9 and 10;
pistons whereby the force of explosion in one
cylinder is used for increasing compression in 20 Fig. 13 is a diagrammatic view of the eccentric
in different positions on the shaft of the engine
the next cylinder, the power output of the en
shown in Figs. 9 and 10.
gine varying in accordance with the change of
My engine as shown in Figs. 1 and 2 consists
the compression stroke. Thus it becomes pos
of a casing l with bearings 2, 3 for a crankshaft
sible to obtain relatively greater compression with
weak mixtures when the engine is throttled down, 25 4 and cylinders 5, 6 at one side and 1, 8 at the
other side. Pistons 9, II), II and I2 are ?tted in
and the mean effective pressure of the engine is
the cylinders with connecting rods I3, l4,v l5,
increased by using the peak of the explosion
l6 engaging eccentrics l1, l8, l9 and 20, the ec
force for adjusting the rate of piston movement
centric sleeve forming a single bushing rotatively
and transferring the excess of explosion force
at the moment of explosion to the subsequent 30 fitted on a crank pin 22 of the crankshaft 4.
The centers of the eccentrics are successively
stage of expansion. An added advantage is also
displaced in relation to each other as shown so
obtained by thus reducing the maximum pressure
that when the piston I2 is in its highest exhaust
of the bearings and moving parts,
position, the piston 9 is in the ?ring position.
Another object of my invention is to utilize the
difference of pressure due to the additional rela 35 The opposite pistons l0 and Il are then both in
the lowest positions, piston II at the end of
tive movement of pistons for increasing the
its working stroke, the piston 10 at the end of
length of the piston stroke during the exhaust
the intake stroke.
so as to obtain complete expulsion of the ex
The operation of my mechanism is as follows:
haust gases from the cylinder by moving the
Assuming that the crankshaft rotates in direc
piston closely against the bottom of the cylin
tion
of an arrow 23, Fig. 2, combustible mixture
der. The intake stroke is thereby also increased,
has just been ignited in the cylinder 5, piston 9
resulting in a larger volume of the explosive mix
moving downward and rotating the crankshaft.
ture being drawn into the cylinder. This pur
Piston II] will begin its compression stroke, the
pose is obtained by providing the engine with
a pair of cylinders, or several such pairs. The 45 eccentric I‘! being then subjected to the working
pressure indicated by the arrow 24, and under
pistons in every pair being connected to a com
compression pressure in the cylinder 1 as indi—
mon crank of the shaft by a ?oating bushing
with two eccentrics so arranged that the bushing
cated by an arrow 25, acting on the eccentric l8.
as a two cylinder engine or any other type such
as opposed, radial or V-type.
pressure in the cylinder 5. This rotation of the
eccentric sleeve on the crank pin causes simul
These two forces are at an angle to each other
is rotated by the force of explosion in one cyl
and will tend to turn the eccentric sleeve on the
60
inder, placing the other eccentric in a position
crank pin when the compression pressure in the
in which it completes the exhaust stroke more
cylinder 1 becomes greater than the working
fully. The engine for this purpose can be built
My invention is more fully described in the ac 65 taneous additional relative movement of all
2,408,890
3
pistons in the cylinders because of the rigid con
nection between the eccentrics. As shown in
Figs. 1 and 2, the piston l2, at the beginning
of the working stroke in cylinder 5, is moved in
a position in which it reaches the bottom of the
4
maximum value of the explosion pressure is de
creased, a relatively greater pressure is obtained
on a longer portion of the piston travel so that
the mean effective pressure of the cylinder is in
creased, thereby increasing its power output and
cylinder 6, completely expelling the exhaust gases.
e?iciency.
The next explosion will be in the cylinder 1.
A ten cylinder engine is shown in Figs. 9 to 13
Additional relative movement of the pistons in
inclusive with two sets of cylinders, each set hav
creases compression space in the cylinder 1. The
ing ?ve cylinders, radially mounted on a com
piston | | of cylinder 8 at the end of the compres 10 mon crankcase 6| at equal distances apart.
sion cylinder 1 reaches the top of cylinder 8,
Cylinders of one set are numbered 5|, 52, 53, 54,
completely expelling the exhaust gases.
The
55 and of the other set 56, 51, 58, 59, 60. A com
action will be the same for the next explosion
mon crankshaft 62 is journaled in the crankcase
in the cylinders 6 and 8. It will vbe noted that
and is provided with a single crank 63. An eccen
rotation of the eccentric is produced and con 15 tric collar 64 is rotatively mounted on the crank
trolled only by the working pressure in one
and is pivotally connected at 65, 65 to connecting
cylinder and by the compression pressure in an
rods 66, 66, engaging eccentrics 61, 68 extending
other cylinder, and no other additional mecha
from pistons 69, 10, 1|, 72, 13 in one group and
nism is used for such rotation. It may be seen
W3, 15, T6, 11, 18 in the other group. This engine
that the exhaust and the intake strokes are con 20 combines the features shown in Figs. 1 and 2
siderably greater than the compression and power
with the features of the engine of Figs. 5 and 6.
stroke with the result that more combustible mix
Successive positions of the eccentrics are shown
ture is introduced into the cylinders. The engine
being supercharged to that extent, and the ex
haust gases are more completely expelled, leav
ing a clean combustion chamber for receiving
a fresh charge of the mixture.
My system is also applicable to radial engines.
A seven cylinder engine is ShOWn in Figs. 5 an'df?
with cylinders 27, 28, 29, 35, 3|, 32, 33 mounted
one common ‘crankcase 34 with a crankshaft 35
having a single crank pin 36. An eccentric
collar or ring 31 is rotatively mounted on the crank
pin and is pivotally connected ‘at 38 to connecting
rods 39 extendingfrom pistons 46, 4|, 42, '43, M,
45 and 46. The ?ring order is so arranged that
the power strokes follow each . other in every
other cylinder, ?rst in odd numbers, and ‘then in
even numbered cylinders.
.
' Thus when explosion takes place in the cylinder
27, the piston 40 will move downward in direction
of an arrow 41, rotating the crankshaft and caus
ing compression in the cylinder 29. The working
pressure of cylinder 2'! will be opposed. by the
diagrammatically in Fig. 13. Assuming that the
piston of the cylinder 5| has just ?nished its
compression stroke. The eccentric 61 will then
take its lowest position with the eccentric 68 in
the uppermost position. Following the explosion
in the cylinder 5| , the crank will turn toward '
the axes of the cylinders 52 and 51. The cylin
der 52 will be under compression and the cyl
inder 5'! will have an exhaust stroke. The ec
centric 51 will be under action of the Working
pressure in the cylinder 5| and compression of
the cylinder 52 so that its position at every mo
35 ment will be determined by the balance of these
forces. As a result, the compression space of
the cylinders or the piston displacement will be
automatically varied. If an explosion now occurs
in the combustion space of the cylinder 52, the
piston under action of this explosion force will
increase the displacement of the explosion cham.
her and will correspondingly reduce the explo
sion pressure. The eccentric ring will rotate
around crank pin under action of the explosion
compression pressure in the cylinder 29 as shown 45 force in direction ‘of an arrow 19 and will pro
by the arrow 48 so that the eccentric ring will
duce an added additional relative movement to
rotate under action of ‘these forces in direction of
the pistons of all the other cylinders.
an arrow ??, the position of the eccentric ring at
The eccentric 67, turning under the force of
every moment being determined by the balance
explosionin the cylinder 52, will cause an addi
50
of these forces. .As a result the compression space‘
tionalv relative movement of the piston of cyl
of the cylinders or the piston displacements will
inder 51 through an eccentric 68, forcing the pis
be automatically varied.
.
ton of cylinder 57 to the top of the cylinder, com
Thus when explosion takes place in the cylinder
pletely expelling‘the exhaust gases. At the same
29, ,the force of explosion acting through the
time the eccentric'?l under. the same conditions
piston will turn the eccentric ring 31 in direction 55 will provide anadditional movement to the piston
of an arrow 49 while turning the crankshaft,
69 of the cylinder 5|, partly transmitting the
thereby increasing the displacement of the explo
pressure of the explosion-in the cylinder 52 to
sion chamber and reducing the peak of the pres
the cylinder 5| wherethe working stroke takes
sure. The rotation of the eccentric ring 3'! simul
place.
taneously causes additional relative movements 60
The explosions» in the cylinders may follow
of all the other pistons. The piston 40 of the
each other in a. diiferent order. The order‘ of
cylinder 21 will also receive an additional move
explosions changes direction of rotation of the
ment from the eccentric ring 3'! due to the ex
eccentric ring on the crank.
plosion in the cylinder '29, part of the explosion
The compression chamber in this engine is
force in the cylinder 29 being thereby trans 65 automatically increased and the compression
mitted into the cylinder 21 where working stroke
pressure reduced in the cylinder in which there
takes place. This engine thereby has an ad
is an explosion at the start of the engine.
vantage in that the volume of the compression
The engine of Figs. 9 to 13 inclusive has all
chamber automatically varies and the volume of
the, advantages of the engine of Figs. 5‘and vSand,
the explosion chamber also varies, being auto 70 besides, effects a complete exhaust of the burned
matically increased at the moment of explosion,
gases.
reducing the maximum pressure, and transmit
_It ‘is understood that my internal combustion
ting a portion of this pressure into the next
cylinder where working stroke takes .place.
It should be noted, however, that while the
engines may be further modi?edwithout depart
ing from the spirit of the invention,pas set, forth
in‘ the appended claims.
'
>
2,408,890
5
l claim as my invention:
-
1. An internal combustion engine comprising a
plurality of cylinders mounted on a crankcase;
a crankshaft rotatively mounted in the crankcase
having a single crank pin; an eccentric sleeve
rotatively mounted on the crank pin of the crank
shaft; a collar rotatively mounted on the sleeve;
4. A multicylinder internal combustion engine
having a crankcase with a crankshaft, cylinders
radially extending from the crankcase, and pis
tons in the cylinders with connecting rods; in
combination, an eccentric rotatively supported on
the crankpin of the crankshaft; a collar rotative
ly mounted on the eccentric, rigidly connected to
the inner end of one of the connecting rods; and
pistons in the cylinders with connecting rods; and
means for connecting the inner ends of the other
operative connections between the inner ends of
the connecting rods and the collar for causing ro 10 connecting rods with the collar, the ?ring order
of the cylinders being arranged for causing ex
tation of the eccentric sleeve on the crank pin
plosions to take place alternately in the direction
solely by the difference of pressure in one cyl
of rotation of the crankshaft, causing the eccen
inder between working pressure and compression
tric
to be rotated on the crankshaft solely by the
pressure in another cylinder acting on the collar
for imparting to all pistons of the cylinders a si 15 pressure on the collar, thereby alternately vary
ing the compression space in the cylinders.
multaneous additional relative movement there
5. A multicylinder internal combustion engine
by varying the volume and pressure of compres
having
a crankcase with a crankshaft, cylinders
sion chambers in the cylinders depending on the
radially extending from the crankcase, and pis
induction volume of mixture in the cylinders.
tons in the cylinders with connecting rods; in
2. An internal combustion engine comprising a 20
plurality of cylinders mounted on a crankcase; a
combination, an eccentric rotatively supported
crankshaft rotatively mounted on the'crankcase,
on the crankpin of the crankshaft; a collar ro
crank pin solely by utilizing the difference be
30 on the crankshaft solely by the pressure on the '
tatively mounted on the eccentric rigidly con
having a single crank pin; an eccentric sleeve ro
nected to the inner end of one of the connecting
tatively mounted on the crank pin of the crank
rods; and means for connecting the inner ends
shaft; a collar rotatively mounted on the sleeve; 25 of the other connecting rods with the collar, the
pistons on the cylinders with connecting rods;
?ring order of the cylinders being arranged for
and operative connections between the inner
causing explosions to take place successively in
ends of the connecting rods and the collar for
alternate cylinders in the direction of rotation of
causing rotation of the eccentric sleeve on the
the crankshaft, causing the eccentric to rotate
tween the explosion pressure in one cylinder and
working pressure in the other cylinders acting
on the collar, for providing all pistons of the
cylinders with simultaneous additional relative
collar, thereby increasing the compression space.
6. In a multicylinder internal combustion en
gine having a crankcase with a crankshaft and
cylinders with pistons and connecting rods ex-.
movement which transmits a part of explosion 35 tending radially from the crankshaft; in combi
pressure from one cylinder in which explosion
nation, an eccentric rotatively mounted on the
just occurred to the other cylinders in which
crankpin of the crankshaft; a collar rotatively
working stroke takes place, thereby increasing
mounted on the eccentric; pivoted connections
the power of the engine.
between the collar and the inner ends of the con
3. A multicylinder internal combustion engine
necting rods, the ?ring order of the cylinders be
having a crankcase with a crankshaft, cylinders
ing arranged for producing a succession of im
radially extending from the crankcase, and pis
pulses for rotatively displacing the eccentric on
tons in the cylinders with connecting rods; in
the crankshaft solely by the pressure on the col
combination, an eccentric rotatively supported 45 lar, the impulses constituting component forces of
on the crankpin of the crankshaft; a collar ro
tatively mounted on the eccentric rigidly con
nected to the inner end of one of the connecting
rods; and means for connecting the inner ends of
the explosions and compressions in alternate cyl
inders.
7. An internal combustion engine comprising
several cylinders and a crankshaft, the cylinders
the other connecting rods with the collar, the 50 extending radially in different directions from
?ring order of the cylinders being so arranged as
the crankshaft, the cylinder having pistons with
connecting rods operatively connected to the
to produce a component force of an explosion in
crankshaft; and means operated solely by the bal
one cylinder and compression in another cylin
ance of forces of explosion and compression in
der acting on successive peripheral portions of the
collar for causing the eccentric to rotate, thereby 55 different cylinders for varying the displacement
of. the cylinders.
varying the compression space in the cylinders
the variations in the strokes being effected sole
ly by the component force.
THEODOR P. SOPROUNOFF.
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