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Патент USA US2411924

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. 3, 1946.
’ B. s. KRATZER
_ l2,411,924
CYLINDER STRUCTURE FOR ENGINES
Filed Jan. 19, 1945
-
2 Sheets-Sheet l
Dec. 3, 1946.
-
B. s. KRATZER
2,411,924
CYLINDER v STRUCTURE FOR ENGINES
Fired Jan. 19, 1945
2 sheets-sheet 2
Patented
3,
I .z,4i1,924
_UNITI-:o ‘STATES PATENT. orrlcß
Blair S. Kratxer, Williamsport, Pa., assixnor to
' The Aviation Corporation, New York, N. Y., a
corporation of Delaware
Application January 19, 1945, serial No. 573,518
'
j
somme.
(cl. 12s-_173)
»
'
2
The invention relates to-cooled cylinder struc-l
tures and cylinder-heads for internal combustion
in
engines.
of bore 9 and against shoulder tt in the cylinder- v
j
s
of hardened steel,l is shrunk in the outer end
„
AOne object of the invention Vis to provide a
head.
cooled cylinder-structure and head which are
of a barrel> 1, the outer end of which is extended
into the cylinder-head and provided with an
ture for preventing the escape> of. combustion
y external annular shoulder ‘I-a and at its inner
gasses,l and for preventing the escape of coolant
„ a pre-assembled cylinder-structure v which. com
prises a sleeve and a coolant-jacket which can
be readily fabricated as a unit and assembled
with the cooled cylinder-headv and the engine
casing.
Other objects of the invention will appear from
the detailed description.
-
.
The invention consists in the several features
hereinafter set forth and more particularly de'
flned by claims at the conclusion hereof.
In the drawings:
end with a shoulder 8, which is adapted to seat
HI
ead.
Another object of the invention is to provide
-
A
The cylinder for the usual lpiston consists
adapted, when assembled together,-' to provide
seals between the head and the cylinder-struc
Ibetween the cylinder-jacket and the sealing
annular shoulder I2. A ring I 6, preferably'l
on the engine-casing or crank-case a”.
A cool
ant-transfer sleeve or jacket section I3 is pref
erably formed »of hard steel, provided withan
internal annular shoulder I4 which abuts the
annular shoulder 1-a on the outer periphery
and >adjacent the upper end of barrel l, and the
outer periphery of the sleeve lits in the bore
9 of the cylinder-head. Sleeve I3 is also pro
vided with an annular shoulder-24 which fits
in the bore Il of the cylinder-head. Sleeve I3
20 is shrunk around the -barrel ‘I with" its-shoulder
it in abutting relation with shoulder-ï/.l-a on
the barrel l. The barrel 'I is also ‘formed with
a rib I5 of a prepared diameter “and :the flower
Fig. 1 is a longitudinal section of a cylinder- ` end of sleeve I3 is shrunk around said<rib. An
structure and cylinder-head embodying the in 25 expansible coolant jacket Il' has lits upper end
silver-soldered or brazed, as at I8, to the outer
periphery of sleeve I 3. A ringl I9 is silver
soldered or brazed to the inner periphery of the
cylinder-barrel and the seals.
_
‘
lower end of the jacketV Il and is shrunk-fit
Fig. 2 is a section takenv online 2_2 of Fig". l. 30 to the outer periphery of a rib 2li formed on
vention.
.
.
»
‘
_
.
Fig. l-c isa section ,on an enlarged scale of
a portion of the cylinder-head, sleeve and
Fig. 3 is a sectional perspective of “the coolant
transfer-sleeve, through which the coolant“ ñows
between the cylinder-head and the water-jacket
around the barrel.
.
`
-
Fig. 4 is a section illustrating one of the bolts
lfor securing the cylinder-head on the engine
casing with the cylinder-structure therebetween.
The invention is exempliñed in an internal
-combustion engine wich comprises a crank-case
the barrel.
A ñtting `2l for a, coolant-connec- ’ I
tion is suitably secured in the jacket Il. Sleeve
I3 is provided at its linner end with an annular
series of ports 28 for the iiow of coolant from
the jacket into the~sleeve and with an annular
series of ports 29 for conducting coolant from '
the sleeve to the chamber d in the cylinder
head, so that the coolant from fitting 2| will
flow _through the jacket >I'I and sleeve I3 to
a, a cylinder-structure, and a cylinder-head c. 40 cooling-chamber d in
The usual inlet-valve for'fuel and the exhaust
Chamber d is connected
valve for combustion ‘gasses are mounted in the
for the coolant, as we11
cylinder-head and the latter is provided with a
A ring 23, preferably of
the >cylinder-head
c.
to an y)outlet connection
understoodf-'nï-the art.
soft metall;v s‘f"'coniined
chamber d through which coolant flows for cool- - inthe' bore 9 of the cylinder-head andëis 'com
ing the head, as well understood in the art. The 45 pressed between ring I6 and sleeve I3 ltovform a
cylinder-structure comprises a barrel, a coolant
seal for preventing the escape of gassesfrom the
transfer sleeve between the barrel and the head,
cylinder, between the barrel and the cylinder
and a coolant jacket around the barrel, which
head. The faces of sleeve I3'and ring ISwhich
are -adapted to be pre-assembled in the engine
engage the sealing ring 23 are provided-with
into a unitary structure for convenient instal 50 grooves 26 to form a biting engagement with
lation.
l,
The cylinder-head is formed with a bore or
internalannular groove 9 which terminates-in
an annular shoulder III and with -a second bore
the metal of ring 23. » A ringv or gasket 25 of suit
able elastic material is conñned’in the bore II
of the cylinder-head and compressed between a
shoulder I2 in the cylinder-head and shoulder «
or internal annular groove I I which terminates 55 24 on sleeve I3 to form a seal for preventing
2,411,924
3
sealing means in said other bore between the
escape of coolant between the jacket and the
cylinder-head.
. external shoulder on the sleeve and the shoulder
.
The cylinder assembly is clamped by bolts 30
in said last named bore, for preventing the escape
between the cylinder-head and the crank-case.
2. A cylinder structure for engines comprising:
a cylinder barrel provided with an external annu
of >coolant between the jacket and the head.
Said bolts are adapted to draw the cylinder-head
toward the crank-case and to compress the seal
ing ring 23 in the bore 9 ofthe cylinder-head
and between ring I6 and the upper end of sleeve
I3 and to also compress the elastic ring 25 in
the bore I I of the cylinder-head between shoulder
I2 and annular shoulder 24 on sleeve I3;
varying loads imposed thereon by the combustionprocess and thermal changesv occuring in the
-
-
barrel and provided with «an internal shoulder
abutting the shoulder on the barrel, an‘ external
' annular shoulder and coolant ports; and a coolant
jacket having its outer end` joined to the sleeve
_
The bolts are sufliciently elastic to insure a
nearly constant compression pressure on the
» cylinder-barrel and the seals, regardless of the
structure.
- .lar shoulder; a sleeve for coolant shrunk ‘on the
and its inner end joined to the barrel.
`
3. A cylinder structure for engines comprising:
' a cylinder barrel provided with an external an
15 nular shoulder; a sleeve for coolant shrunk on
~
In fabricating, the cylinder-head, bores 9 and
the barrel and provided with an internal shoul
der abutting the shoulder on the barrel, an ex
ternal annular shoulder and coolant ports; a
coolant jacket having its outer end joined to the
II and shoulders I0 and I2 can be readily ma
chined therein. The ring I6 is shrunk into the 20 sleeve; and a ring inside of and secured to the
.inner end of the jacket and shrunk on the barrel.,
bore 9 and against shoulder I0. In fabricating
4. 'An engine comprising: a cylinder head pro
the barrel, its periphery; shoulder 8, ribs I5 and ,
vided
with a pair of bores with internal annular
` 2D can be readily machined thereon. ` The sleeve
shoulders and a ring seated in one of the bores;
I3 and its shoulders III- and 2'4 can be readily
marA .ined for a shrink-lit on the barrel. The 25 4a cylinder structure including a barrel extending
into said head and a sleeve for coolant around
ring I9 with its inner periphery machined for
the barrel, having a portion fitting in one of the
a shrink-lit on rib 20 is secured in the inner end
,bores and shoulders ñtting in the other of said
of sleeve I1 and its outer endv is secured to the
bores; sealing means in one of the bores between
sleeve I3. The assembled sleeve I3, jacket I1
and ring i9 are assembled with lthe barrel by 30 the sleeve and the ring, for preventing the escape
of gases between the cylinder and the head, seal
shrinking the sleeve I3 and ring I9 on the barrel.
ing means in the other bore between the external
The barrel-sleeve andl jacket will then form a
shoulder on the sleeve and the shoulder in said
unitary structure which is adapted to be replace
last named bore for preventing the escape- of
. ably installed between the crank-case and the
When the head c is secured 35 coolant between the jacket and the head; a
’ cylinder-head.
coolant jacket between the` sleeve and the inner
against the cylinder structure by bolts 30, the
end of the barrel,- and means for securing the
head and cylinder structure will be replaceably _
cylinder structure in the head with the sealing
installed on the engine.
means
compressed.
In operation, thecoolant will flow lthrough `
5. An engine comprising: a cylinder-head pro
fitting 20 around the barrel 1 and jacket I1, 40
vided With a coolant chamber and a pair of bores
ducts 28, sleeve I3 and ducts 29 »to the cooling
with internal shoulders; a cylinder barrel ex
chamber d in the cylinder-head. The sealing
'
tending
into the head; a sleeve secured around
ring 23 will prevent the escape of gases from
the cylinder barrel provided with coolant ducts,
the cylinder between the hea'd‘and the cylinder,
and the sealing-ring 23 will prevent the leakage 45 communicating with the coolant chamber in the
head; vmeans in one Aof the bores forming a seal
of the coolant between the sleeve I3 and thebetween the head and the sleeve for preventing
cylinder head. the escape of gases between the barrel and the
The invention exempliñes a cylinder-head and
head; means in the other bore, between lthe sleeve
cylinder structure with sealing means between
them for preventing the escape of gases between 50 and the head, forming a seal for preventing the
escape of coolant between the head and the sleeve;
the cylinder and the head and the escape of cool
and a jacket between the sleeve and the inner end
ant between the jacket and the lhead.
of the barrel, the sleeve having ports communicat
The invention also exemplifies a structure
ing with the space between the barrel and the
which comprises a cylinder and jacket which are
55
jacket
and means for securing the barrel and
adapted to be economically fabricated into a
sleeve in the4 head and compressing both of the
unitary structure for installation and removal
sealing means.
p
'
from the engine.
Y
'
,
"
6. An engine comprising: a, cylinder-head pro
The invention is not to be understood as limited
vided with a coolant chamber; a. cylinder barrel
to the details described, since these may b'e modi
having its outer end`extending into the head; a
fled within the scope of the appending claims
without departing from the spirit and scope of ' separately formed sleeve fitting around and fixed
the invention.
`
Having thus described the invention,l what I
claim as new and desire to secure by -Letters
Patent is:
'
v
1. An engine comprising: a cylinder-head pro
videdl with a pair of bores with internal annular
to and defining an annular coolant chamber
around the outer end portion of the barrel; an
expansible jacket secured to the inner end of the
65 sleeve and deñning an annular chamber around
the inner portion of the barrel and provided with
a coolant connection; the sleeve being provided
with ports communicatively connecting the an
nular
chamber between the sleeve and the barrel
cylinder structure including a barrel extending
into said head and a sleeve for coolant around 70 with the annular chamber formed by the jacket
.and with the coolant chamber in the head; sealing
the barrel, having a portion ñtting in one of the
means for preventing the escape of gases between
bores and shoulders fitting in the other of said
the barrel and the head; and sealing means for
bores; sealing means between thev sleeve and the
preventing the escape of coolant between the
ring in the headfor preventing the escape of
75
sleeve
andthe head.
_gases between the cylinder and the head, and
shoulders; a ring seated in one of said bores; a -
‘ v2,411,924
5
7. An engine comprising: a, cylinder-head pro
vided with a coolant chamber and a pair of bores
6
tween the sleeve and the vbarrel with the annular
chamber formed bythe jacket and with the cool
with internal annular shoulders; acylinder-bar
ant chamber in the head; sealing means between
rel having itsÍ outer end extending into the head;
the shoulder on the outer end of the sleeve and
a separately formed sleeve iitting around' and 5 one of the internal shoulders in the head, for pre
ñxed to and deñning an annular coolant cham
ber around the outer, end portion of the barrel,
and provided with external annular shoulders '
fitting in the bores, respectively; a jacket secured
to the inner end of the sleeve and deñning an an
venting the escape of gases between the barrel
and the` head; and sealing means between the
other shoulder on the sleeve and the other in
ternal shoulder in the head, for preventing the
l0 escape of coolant between the sleeve and the head.
nular chamber around theY inner portion of the
barrel; the sleeve being provided with ports com
9. An engine comprising: a cylinder-head pro
vided with a coolant chamber and a pair of bores.
municatively connecting the annular chamber be- V with internal annular shoulders; a cylinder-barrel
tween the sleeve and the barrel with the annular I having its outer end extending into the head and
chamber formed by the jacket and with the cool
provided with an annular external shoulder; a
ant chamber in the head; sealing means in» one '
separately formed sleeve fitting around and fixed
of the bores between one of the annular external
to and defining an annular coolant chamber
shoulders on the sleeve and one of the internal
around the outer end portion of the barrel and
shoulders in the head, for preventing the escape
provided with external annular shoulders fitting
of gases between the barrel and the head; and 20 in the bore, respectively, and an annular’ internal
sealing means in the other bore between the other
Ashoulder abutting the annular- shoulder on the
s external shoulder on the sleeve and the other in
barrel; a jacket secured to the inner end of the
ternal shoulder in the head, for preventing the
sleeve and defining an annularrchamber around
escape of coolant between the sleeve and the head.
the inner portion of the barrel; the sleeve being
8. An engine comprising: a cylinder-head pro 25 provided with ports communicatively connecting
vided with a coolant chamber and a. pair of bores '
the annular chamber between the sleeve and the
with internal annular shoulders; a cylinder
barrel with the annular chamber formed by the
barrel having its outer end extending into the
jacket and with the coolant chamber in the head;
head; a separately formed sleeve fitting around
sealing means in one of the bores between one
and ñxed to and defining an annular-coolant 30 of the annular external shoulders on the sleeve
chamber around the outer end portion of the
and one of the internal shoulders in the head, for
barrel and provided with an annular shoulder at
preventing the escape of -gases between the barrel
its outer end, and an external annular shoulder
and the head; and sealing means in the other bore
` ñtting in the bores, respectively; a Jacket secured
between the other external shoulder on the sleeve
Y to the inner end oi the sleeve and defining an an 35 and the other internal shoulder in the head, for
nular chamber around the inner portion of the
preventing the escape of coolant between the
barrel; the sleeve being provided with ports com
sleeve and the head.
municatively connecting the annular chamber be
.
BLAIR S. KRATZER.
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