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Патент USA US2120004

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June 7, 1938.
-
'5?
K. SCHWAIGER
2,129,004
COOLING ARRANGEMENT FOR INTERNAL COMBUSTION EINGIIINE'Sv
Filed Feb. 10, 1936
If; q
(in veniar
MJW
ATT‘omyE y
Patented June 7,’ v1938 '
.
I
UNITED STATES PATENT‘ OFFICE"
COOLING ARRANGEMENT. FOR INTERNAL
COLIBUSTION ENGINES
Karl Schwaiger, Gaggenan/Baden, Germany, as
signor to .Daimler-Benz Aktiengesellschaft,
Stuttgart-UnterturkheimI Germany
Application February 10, .1936, Serial No. 63,229
11' Claims. (01.12am)
My invention relates to internal combustion
engines and, more particularly, to an improve"ment of the liner which constitutes the cylinder,
of such an engine and is arranged to be in di- 5 rect contact with'the cooling liquid. '
.
Prior to my invention it has been proposed
to provide a liner of this type near its margin
with a collar which is conically tapered in an
axial direction and arranged in contact with‘
10 the cooling water, the collar being formed with
inserted‘ liner. The liner is provided near its
upper end with a collar 121 forming a shoulder 412
at a substantial distance from the end of the
liner. The radial thickness of the collar d1
gradually increases from the upper end of the 5
liner towards the shoulder d“, whereby a uni
form dissipation of the heat towards the cooling
jacket is ensured. The plane end-face of the
liner bears against the. plane face of the cylinder
head b, a suitable gasket being interposed. The 10
a groove in its rim and with a shoulder near its
rim bearing on a similar shoulder provided on
tapered shape of- the upper end of the liner has
the advantage that the collar (11 arranged in di- ‘
the cylinder-jacket. ‘This prior construction
rect contact with the cooling water is more ef
leads to an objectionable accumulation. of ma-
?ciently cooled near its top where it is subjected .
15 terial at the point of contact between the liner
to a higher, temperature than near its lower end. 15
and the cylinder-cover, whereby the effective
The embodiment illustrated in Fig. 2 differs
cooling at this hottest point of the liner is greatl‘y impaired. This is liable to cause the liner to '
be .overheated, whereby carbon will be formed
90 by residual oil and the upper end of the piston
may jam within the 'liner. Moreover, objectionable stresses are set up in the collar of the
liner, when the nuts of 'the" cylinder-head are
tightened, whereby the inner diameter of the
from that in Fig. 1 only by the relative arrange
ment of the liner and the cylinder-head. In this
embodiment, an annular groove 1‘ is provided in
the cylinder-head into which the upper end of 20
the liner 12 projects, a suitable gasket being in
terposed. This arrangement permits the width
of the end-face of the liner to be dimensioned
smaller than it would be possible in the embodi
55 cylinder may be reduced or the collar may even ment of Fig. 1. Moreover, the cooling effect is 25
be tom-off the liner under adverse circumstances. _ increased as the gasket is so positioned that it
The liability of injury to the collar'is enhanced
by the provision 'of the‘ corner situated in the
hottest zone at the shoulder near the marginal
.0 rim of the liner.
The object of myinvention is to avoid these
disadvantages. One ,feature'of, my invention resides in the provision of the shoulder formed
by vthe collar at a. substantial distance from the
does not interfere with the flow of heat. A leak
age past the gasket is more e?iciently prevented
by its inclusion‘ in the annular groove
The embodiment of Fig. 1 is particularly so
adapted for engines provided with a plurality
of cylinders in a single row and for sheet-metal
structures, whereas the embodiment of Fig. 2 is
better adapted for engines in which each cylinder
35 end of the liner. According'to another feature
of my invention, the end-'face of the liner is
is provided with an individual‘ cover or head.
It will be seen that I have provided a construc
smooth and plane and the conical shape of the
35
tion which satisfies the Objects enumerated
collar is made as'slim as possible, The end- ' .above and one which constitutes a valuablead
- face of the liner may abut directly against the vance in the art. While I have shown the inven
40 plane cover of the cylinder or the end of the
liner may project into an annular groove provided in the cover. Preferably, a gasket is inserted in this groove and interposed between the
end-face of the liner and the cylinder-cover.
‘5
tion in certain physical embodiments, it is to be 4Q‘
understood that modi?cations of the structure
shown may be made by those skilled in this art
without departing from my invention as ex
Pressed in‘the claims which follow.
In the accompanying drawing, two preferred
embodiments, of my invention are illustrated,
What I claim is:—
,
. .
'
45
1. In an internal combustion engine, the com
Fig. 1 showing an axial section'through the
bination comprising a cooling jacket provided
upper part of a cylinder in which the liner bears
against a plane face of the cylinder cover; where-
with an inner shoulder, a cylinder-liner mounted
in said cooling jacket for direct contact with the
as -
cooling liquid and provided with a plane end-face 50
'
’
'
Fig. 2 is a similar view of a cylinder in which ' and with 'a'peripherai shoulder which is substan
the upper end of the liner projects into an an- tially spaced from‘said end-face and bears on
nular groove of the cylinder cover.
»
said ?rst-mentioned shoulder, and a plane cyl
‘ In Fig. l a designates the cylinder jacket, b inder-cover abutting tightly against said end
55 the cylinder-head or cover, c the piston, 11 the
face and said coolingjacket, said peripheral 55
2
2,120,004 _
shoulder being formed by a conical‘ collar of the cylinder liner projects and tightly closes off the '
liner tapering towards said end-face.
cylinder space.
,
2. In an internal combustion engine, the com
8. In an internal combustion engine, a cylin
bination comprising a cooling jacket provided der housing, a cylinder liner positioned in the '
with an inner shoulder, a cylinder-liner mounted same, and surrounding the cylinder space, an in- _,
in said cooling jacket for direct contact with the termediate wall in‘ the cylinder housing spaced ,
cooling liquid and provided with a plane end.
from the cylinder liner, an outsidewall of the
face ‘and- with a peripheral shoulder which is cylinder‘ housing surrounding the same, an axial
formed by a conical collar of the liner tapering ly extending bearing surface positioned on the
towards said end-face and being of substantial intermediate ‘wall and which is positioned in the
axial length and which bears on said ?rst-men
vdirection of the cylinder axis at a substantial dis
tioned shoulder, and a cylinder-cover provided tance from the upper end of the cylinder space,
with an annular groove} the end of said liner a. collar on the cylinder liner which abuts axially
projecting into said groove.
_ '
against said bearing surface, an opening under
15
3. In an internal combustion engine, the 'com
neath
bearing surface and a further ‘opening
bination comprising a cooling jacket provided in the the
intermediate wall above the same, through‘
with an inner shoulder, a cylinder-liner mounted which‘ the cooling material existing in the inter
in said cooling jacket for direct contact with mediate space between the cylinder liner‘ and the
the cooling liquid and provided with a plane end-. . cooling canal underneath the bearing surface is - '
20 face and with a peripheral shoulder which is sub
admitted, and passes around the bearing surface
stantially spaced from said end-face and bears over the outside intermediate space between the
on said ?rst-mentioned shoulder, a plane cylin
intermediate wall and the outside wall of the
der-cover, abutting against said end-face and cylinder into the cooling space above the bearing
said cooling jacket, and a gasket between said surface. -.
25 cylinder-cover and said end-face, said peripheral
9. In an internal combustion engine, the com- a
shoulder being formed by a conical collar of the bination according to claim 8 in which the .upper
liner tapering towards said end-face.‘
. end of the cylinder liner above the ‘said bearing .
, 4. In an internal combustion engine, the com
surface diminishes toward the end in a generally
bination ‘comprising a cooling jacket provided 'conical manner.
with an inner shoulder, a cylinder-liner mounted
10. In an internal combustion engine, the com- -';‘
in said cooling jacket for direct contact with the bination comprising a cooling jacket provided
cooling liquid and provided with a plane end
with an inner, shoulder, a cylinder liner mounted
face and with a peripheral shoulder which is in said cooling ‘jacket for direct contact withthe
formed by a conical collar of the liner tapering cooling liquid and provided with‘; a peripheral
towards said end-face and being of substantial
shoulder which is substantially spaced from said . .
axial length and which bears on said ?rst-men
end-face and bears on said ?rst mentioned shoul
tioned shoulder, a cylinder-cover provided with
an annular groove, the end ofsaid liner project
ing-into said groove, and ‘a gasket inserted in
said groove.
der, a plane cylinder cover abutting tightly
against said end-face, said peripheral shoulder
being formed _'by a conical collar of the liner ta
perlng toward said end-face, and a centering sur-_.
face for the cylinder lin'erlpositioned between the
shoulder and the end of the cylinder liner oppo
5. In an internal combustion engine having a
' cylinder housing, an inner shoulder provided on
the cylinder housing, a cylinder cover ?rmly con
nected to said housing, and a cooling jacket,‘ a cyl
inder liner positioned at one end against the cyl
inder cover, a shoulder surface on the cylinder
liner abutting axially against the shoulder on the
cylinder housing, said shoulder surface being po
sitioned at a considerable distance axially from
50 the joint between'the cylinder liner and the cyl
site the cylinder cover.
.
11. In an internal combustion engine, the com
bination comprising a cooling jacket provided
a
with an inner shoulder, a cylinder liner mounted
in said cylinder jacket for direct contact with the - Q
cooling liquid and provided with-a plane end- '
face and with a peripheral shoulder which is sub
stantially spaced from said end-face and bears on
inder cover, and that end portion of the liner be
said ?rst mentioned shoulder, and a plane cylin
tween the shoulder surface and the cylinder cov-' der cover abutting tightly against said end-face,
er consisting of a- wall the thickness of which be
said peripheral shoulder being formed by a coni
comes less toward said cover and presents to the cal collar of the liner tapering towards ‘said end
55 cooling ?uid'substantially its entire cuter sur
‘face, and said cooling jacket having an interme
diate inner wall which has passages for the cool
6. vIn an internal combustion engine having a ing .material above and below the shoulder,
cylinder housing,‘an inner shoulder provided on whereby the cooling material is conducted about
the cylinder housing, a cylinder cove'r ?rmly con
the shoulder surfaces by an outside ‘cooling canal
nected with the housing and a cooling jacket, a formed by the additional inner wall.
'
‘cylinder liner positioned at one end against the
12. The combination according to claim 2 in 60'
cylinder cover, a shoulder surface at the cylinder which said cylinder cover‘ abuts said ‘cooling
liner abutting axially against the shoulder on the
cylinder housing, said shoulder surfaces being po
13. The combination according to claim 4 in
sitioned at a considerable distance axially from which said cylinder cover abuts said cooling
'
the dividing joint between the cylinder liner and jacket.
' the cylinder cover, and that end portion of the
14. In an internal combustion engine, the com
liner between the shoulder surface and the cylin
bination comprising a cooling jacket provided
der cover consisting of a smooth surface which with an inner shoulder, a cylinder liner mounted
diminishes toward the'cylinder cover in a gener
in said cooling jacket for direct contact with the
ally conical manner and presents to the cooling cooling liquid and provided with a plane end-face
_>?uid substantially its entire outer surface.
and with a peripheral shoulder which is sub-1
7. In an internal combustion engine the com‘
face.
.
.
’
jacket.
_
‘
'
.70
. bination according to claim 5 together with a cir
75 cular groove in the cylinder cover in which the
I stantially spaced from said end-face and bears on
said ?rst mentioned shoulder, a- plane cylinder
coverv abutting tightly against said end-face,
2,120,004
said peripheral shoulder being formed by a coni
cal collar of the liner tapering towards said end
face, and passages in said cooling jacket for per
mitting the cooling liquid to contact said liner
above and belowlsaid shoulder.
' 15. The combination according to claim' 2 in
'
-
‘
>
3
16. The combination according to claim 5 in
cluding passages in said cooling jacket ior per
mitting the cooling'iiquid to contact said liner
above and below said shoulder.
17. The combination according to claim 6 in
cluding passages in said cooling jacket for per
cluding passages in said cooling jacket for per-. mitting the cooling liquid to contact said liner
'
mitting the cooling liquid to contact said liner above and below said shoulder.
‘KARL SCHWAIGER.
above and below said shoulder.
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