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Патент USA US2113990

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_ >Aprîlv 1,2, 1938.
k
R. LARAQUE
ÍNTERNÀL COMBUSTION ENGINE
`
_ 2,113,990
April 1.2,
_
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' R. LARAQUE ì
INTERNAL
CQMBUsTIoN
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ENGINE
Filed Oct. 31,' 1936`
2,113,990
A
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2 Sheets-Sheet 2
2,113,990'
Patented Apr. 12, 193s
UNITED ¿STATES2,113,990PATENT oFFlcE
INTERNAL connus'rloN ENGINE'
Roland Laroque, Paris, France
`
Appliance october s1, 193s. semi No. _198,374
I_n Luxemburg November 4, 1935 '
4 Claiml.
(Cl.
12S-51)
ì
'
~
The present invention has for its object im-v ample, a particular form of realization of the
provements in internal combustion engines of the invention, the blasting arrangement --beingn one
-type comprising two opposite pistons moving in'
comprising two eccentric rotors.
-
The drawings represent:
contrary directions in one and the same horizon
5 tal cylinder and acting through the medium of
`
_
` '
Fig, 1 a vertical section through the axis -oi’ the
5 .
cylinder, according to lines, I----I of Fig. 2;
`
Fig.l 2 a lateral view, partly in section, an in
.pivoting beams upon one crank-shaft.
' The motor according to thev invention is of
the type of the two stroke'cycle engines working . spection cover being removed;
Fig. 3 a transverse section according to lines -m
m with scavenging equicurrent air.
One feature of the invention' consists in that.
the arms of each pivoting beam are laterally dis- -
placed with regard to each other in order-to per
I-l of Fig. 1, and
-
_ .
Fig. 4 4a section through the ily-wheel accord
ing to lines 4_4 of Fig. 2.
_
_
1
In a horizontal cylinder a slide, in a known
' mit of their seizing the crank-shaft at two differ- manner, two pistons b1, b2 with their'heads op
ent points along its axis.
posite to each other, these pistons being con
.At the other part, the horizontal cylinder is
disposed in the case-in such manner that' a shoul
der of the'cylinder applies against a partof the
case, and a neck of this cylinder,'situated toward
the other‘extremity of the latter centers itself in
20 a part `of the lcase and serves as abutment and
joint surface for a -removable cap forming a col
_lector for admission of the scavenging air. -
In this manner, by withdrawal of the air col
lector the cylinder is readily accessible.
25
«
Another feature of the invention consists in
nected by links c1, to two beams di e1, día en piv- .
oting around axles fi fz.
_
To the forked extremities g1 gno! these beams
are articulated two links h1- hz engaging crank ‘
pins of a crankshaft i.
20
'
According to the invention the -arms of the
beams, for- exampleidi c1 »(Fig. 2 are laterally
displaced with regard to each other, in one di
rection in one beam and in the opposite direction
inthe other beam, so that the crankshaft 1’ is 25
acted upon in two diiîerentpoints.
_
'
that the flywheel regulating the run of the motor ’
The horizontal cylinder a is provided (Fig. 1)
is constituted to form the blasting engine, the with
shoulder k supported by a >part I of the
operative elements of which -are~ situated in the case, aand,
toward its other extremity, with a
interior of the ily-wheel and comprise a cell
‘ neck m centered in a bearing surface n of the 30
30 of a rotary pump acting by volumetric variations, case and serving as abutment and joint ‘surface
the periphery of the :dy-wheel serving directly as
' outer pump cylinder, by which _arrangenient all for a removable cap p forming a' collector for
the scavenging air, this neck squeezing a joint q
coupling means and all power transmitting means
and being simply ñxed by four bolts p', so that
between the motor shaft >and the engine produc
after removal of an inspection door s and with 35.
35 ing the scavenging _air are eliminated.
l drawal of the cap p the cylinder is immediately
In a_ prei’erredfY i’orm> of realization, a pump
with two eccentric .rotorsis employed, these ro
tors revolving around a stationary and hollow
40
shaft traversed _by the air" sucked into the pump,
the'two `rotors being in tangential contact with
each other and forming between them. a pump
chamber or cell in the shape ot a _crescent sep-_
arated by a vane carried by the outer cylinder,
in two chambers ol'alternately increasing and
‘ decreasing volume.
_
1_.. "
In fthis form of realization, the. case surround
- .ing the ily-wheel of the motor forms a collector
accessible and removable.
'
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`
To the end i' of the crank shaft 1“ is keyed the
regulating ily-_wheel k'hollow onpone of its faces
so as to form the outer cylinder l’ of the alr 40
scavenging pump.
In the example shown, the pump is of the
type comprising
two eccentric rotors, one of the »
rotors 4being constituted by the said cylinder l'
and the other rotor‘being formed by an inner- 45
drum m' centered on an end of an auxiliary
shaft n' eccentric with; regard to the axis of the
crank-pin and'hollow inits interior.
for `the air‘ïtobedrive‘n and supports the hollow Y This scavengingengine is located in the in
stationary shaft which' is eccentric with regard . >terior of a .case r' ._ forming a collector ffor the 50
50 _ to
thercell .ofthe pump.
-
f
_
Finally, according to the invention, cooling
water 'is first led into a lower pocket in order to
lower `the >temperature Aoi.’ the lubricating oil, and
scavenging air led- through a conduit r‘attached
to this case, .under pressure into the. motor, as iateron referred to.
.
A radial vane q' carried by the outer cylinder
then ‘into fa. chamber _completely surrounding the i’ vseparates `the crescent-like space between the- 55
55 cylinder «in-its central _part forming the combus
two rotors l’ `and m' >(Fig. .2) in two chambers
tion chamber, as Lwell -as the'collector containing
the fluid toîbe-exhausted.
_'
Dìiierent other `features will be referred to in
the followingdeseription relating to the drawings
6 appended showing, merely in the way .of an ex.
q" and q'" of respectively increasing and -(ie-_
creasing volumes, ` one of> these chambers q",
communicating with the suction conduit through
a hole s' provided in. the peripheral wall of ‘the 60
|
.
2 .
2,118,090
l inner drum, and the other of these chambers
removably held in said casing, means for scaveng
communicating with the drive conduit through - ing the burnt gases, said means including a com
a hole s" provided in the rim l’ of the outer
bined flywheel-air-pump, piston controlled ports
cylinder.
in the cylinder through which scavenging air is
‘
Air sucked across the bore of the shaft n' (fil
trated in case of emergency) arrives into the
chamber u' and through oriñces u" provided in
the bottom of the drum m' into >_the chamber q"
in which suction is going on, and ñnally evacu
10 ated, in the next period, through the hole s"
into the case r' and through the conduit r to
ward the circular scavenging collector p" (Fig.
3) of the cap p.
-
‘I'his air penetrates into the cylinder a across
admitted into the cylinder, a hollow head sur
rounding the cylinder at the position oi the open
ings, and a duct from said pump to said hollow
head, said head serving the dual purpose oli-ía...`v`
member for entry of air intothe cylinder and as
a means by which the cylinder may be held in
place in the casing. \
2. In an internal combustion -engine, a case
having means removably to receive a working
cylinder, a cylinder located in said means, and
,peripheral orifices t situated nearthe lower dead . . mechanism to scavenge the burnt mixture, said
point of one of the pistons.
mechanism comprising inlet ports at the cylin
'I‘he exhaust is effected through other ori?ces
t1 peripherally situated near the dead point of
the other piston, into a collector u forming part
head encircling the cylinder at the position of
of the case and wherefrom the gases are evacu
ated into the atmosphere.
~
case and in cooperation with ilanges on the cylln'
der, a combined ilywheel-alr-pump, a hollow
said ports, means to secure said head to said y
der, hold said cylinder in place in the case, in
In order to compensate the hollow space in the virtue of which said head serves the dual pur-'
ñywheel, the same can be weighted by plumber _ pose of securing the cylinder against displace-v
k" located toward the periphery of this wheel. -ment in the case and as a member for entry_of
'I'he eccentric stationary and hollow axle n’
air into the cylinder, -and a duct to eilect com
around which rotates the inner drum m', is sup
munication between-said pump and said head for
ported by a removable hub r".
Y
'I'his hub is situated at the extremity of the
case T', so that theparts of the blasting engine
conducting air from the pump to the head.
3. In an internal combustion engine, a case
having means removably to receive a working cyl
inder, a cylinder located in said means, and
mechanism to scavenge the burnt mixture, said
30 are readily accessible and removable.
_ ‘
An inner boss 1"’ on this hub r" serves as
bearing surface for the bottom part l" fixed to ' mechanism comprising inlet ports at the cylinder,
the fly-wheel.
l
‘
a combined ñywheel-air-pump, a hollow hea‘d en
The lower part~of the case is waterÍjacketed l circling the cylinder at the position of said ports,
as at v and a water jacket y surrounds at least _means to secure said head to vsaid case and in
the working chamber portion' of the cylinder a. cooperation with ilanges on the cylinder, hold
VWater is admitted, to the chamber vin any suit
said cylinderuin place in the case, in virtue of
able manner, from a water pump (not shown)
which said head serves the dual purpose of se
and is conducted from chamber o to chamber y~ curing the` cylinder against displacement in the
40 by a duct :z: shown in dottedlines in Fig. 2 and
case and as a member for entry_of air into the
leaves chamber y, to be returned to the pump, ' cylinder, a duct to eiîect communication between
through outlet a. The water in chamber v cools ' said pump and said head for conducting air from
the oil at the bottom w of the case.
the pump to the head, the pump of said com
The principal advantages of the arrangement bined ilywheel-air-pump, including an outer
45 according to the irfvention are:
cylinder constituted by the outer wall .of the ily
(a) Perfect equilibration of the torque, so that wheel, an inner drum eccentric tothe outer Acylin 10
use of masses with alternating movements secur
der and interiorly tangential, means to divide the
ing equal and opposite forces of inertia is dis
space between said outer 'cylinder and said inner pensed with;
drum into an intake chamber and an outgo
(b) Great simplicity of execution;
chamber, a hollow eccentric auxiliary shaft on
(c) Possibility to verify very easily the two link
said inner drum is mounted, and means
systems without dismantling the motor, simply which
to carry said auxiliary shaft, _the outer cylinder
by opening the 'lateral inspection doors s;
having an air outlet fromV said'outgo chamber,
(d) Feeble encumberment;
A
‘
said
hollow auxiliary shaft serving as la means
(e) Feeble weight;
`
to admit air into said intake chamber.
(.f) Very compressed form of the whole, even
4. In an internal combustion engine, a case 20
tually presenting numerous advantages for many
having web-like elements in it, which elements
applications;
.
(g‘) The whole motor being well assembled are spaced apart and apertured, a working cylin
der held in said apertures and including a shoul
60 with the scavenging engine, all coupling means
der to abut one of said web-like elements and
as well as all power transmission means between
25
the motor shaft and the scavenging engine are having a neck with ports to the working cham
ber of the cylinder, a hollow cap on v,said neck
dispensed with.'Á
'
The invention is of course not limited to the with its space registering -with said ports, means
65 described and represented embodiment and per
to secure said cap to said case and in engagement
with said cylinde.` whereby said cap will perform 30
mits of any modiñcation of its single parts ac
the dual function of a. means by which scaveng
cording to any particular requirements and, -es
pecially, in accordance with the chosen type of ing air is admitted to the cylinder and by which
rotary pump.
the cylinder is removably secured in place, and
70
What I claim, is:
.
means forming a part of the engine for forcing '
1. In an internal combustion engine wherein air into said hollow cap.
.
is provided a casing and a horizontal working
ROLAND LARAQUI.l _
cylinder having a working chamber and being
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