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Патент USA US2108647

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Feb. 15, 1938.
J, J, BROEZE ‘
2,108,647
COOLED ATOMIZER FOR SOLID INJECTION ENGINES
Filed June 15, 1937
11
10
Fl‘
3
In venfoir
ajé?amws (/2177 5119826;
- 2,108,647
' PatentedFeb. 15, 1938
‘UNITED STATES "PATENT OFFICE ,
ENGINE S
Johannes Jan Breeze, Delft, Netherlands, as.
signor to Shell Development Company, San
Francisco, Calif., a corporation of Delaware
Application June 15, 1937, Serial No. 148,313
In the Netherlands June 22, 1936
5 Claims.
(Cl. 299—107.1)
The invention relates to cooled atomizers for
solid injection engines and more in particular to
such atomizers in which an injection nozzle con
_ ‘ taining a space for cooling liquid is ?tted against
5 a valve housing containing the usually spring
loaded injection valve or needle.
The object of the invention‘ is to obtain in a
simple manner a reliable sealbetween the fuel
space of 'the valve body-in which during the in-‘
10 jection period a very high pressure prevails-and
the space for the cooling liquid.
_
According to the invention this'is achieved by
providing the injection nozzle with a part ex
..
be elfected by means of a special centering edge
ill
(see Fig. 3).
_
L
-
-
.
It is remarked that in case fuel oil is used for
cooling a'leakage of fuel to be injected into the -
cooling space, if under certain conditions this 5
should occur, would not result in contamination
of th/ejcooling liquid. When fuel is used as cool
ing medium any oil leaking along the needle may
be carried o? through the cooling oilv discharge
line‘; to this end the duct It may be provided in a. . I;
the atomizer holder (see Fig. 1).
The ducts 3, 4 and 5 terminate at the top of
the needle housing, 2, as shown in Fig. 2, in re
tending into the fuel spaceof the valve housing, - cesses drilled or milled into 'said top which is
15 said part being cylindrical oLrrthe outside engag
‘ ing with the cylindrical inside of the fuel space.
The invention will now _be explained in more
detail with reference to the drawing.
Fig. 1 is a longitudinal section through an
20 atomizer according to the invention.
‘' Fig. 2 shows the valve housing of Figure 1, seen
from above.
ground so as to fit ‘accurately the underside of
the atomizer holder l3 against which it is tight
ened by means of the nut I4. Set pins l5 en
sure the correct connection of the ducts 3, 4 and 5
to their extensions in the atomizer holder l3. '
The nozzle 6 may be constructed with one or »
more ori?ces, or as a nozzle for a so-called “pintle
atomizer”.
‘
WhatI claim is:
Fig. 3 shows a modified construction of the in
m’
-
.
.7
1. A cooled atomizer for internal combustion
.
3 engines employing solid injection of. fuel compris
With
the
atomizer
according
to
Figures
1
and
2
25
the spring-loaded injection valve or needle I is ing a valve housing, a spring loaded injection
guided in the needle housing 2 which is provided valve therein responsive to periodical increases in
the fuel pressure, a fuel space in said housing
with a‘fuel supply duct 3 and, further, with cool
ing medium supply and discharge ducts 5 and 4_ surrounding said valve, a duct through said hous
ing for supplying fuel to said space, a nozzle of
30 respectively. As cooling medium preferably oil is
jection nozzle on a larger scale.
used, viz. the oil serving at the same time as fuel.
The cooling liquid is circulated through the cool
ing space l2 formed by a groove or recess in the
injection nozzle 6, which recess is sealed by the
35. end of the ‘valve housing, against which the in
jection nozzle is affixed, for instance screwed. J
cap-like shape, a recess in said nozzle constitut
ing a, continuation of said fuel space, a seat in
said nozzle c'o-operating with the injection valve,
an ori?ce in said nozzle at the bottom ‘of said
recess for admitting fuel‘into the engine cylinder
in cooperation with said valve, an inner sleeve
integral with said nozzle surrounding said recess
and extending into the fuel space having a cylin~
welding the nozzle to the ‘housing 2 along the _ drical outside to engage the cylindrical inside of
A satisfactory seal between the cooling space
and the outside can be obtained, for instance, by
seam ‘l or by means of a sealing face 8 as shown
in Figure 3. The nozzle 6 contains also the seat
for the needle I.
‘
~
_/
According to the invention the seal between the
fuel space I I and the cooling space I2 is obtained
45 by mea?s?of the part v9 of the injection nozzle,
which part is cylindrical on the outside and pre
cision-?tted into the bottom part of needle hous
ing 2., This jacket or sleeve 9 made preferably
of steel,.just> as the nozzle 6, is sufficiently de
5
formed under the in?uence of the high fuel pres
sure, which may amount to 100-400 atm., to press
so tightly against the inside of the needle housing
as to form a perfect seal._ .The jacket or sleeve
55 may also be used for centering, but this may also
said fuel space so as to provide a seal between said
inner sleeve and the valve housing, an outer sleeve
also integral with said nozzle for amxing the noz
zle to the end of the valve housing and a recess
in said nozzle between said sleeves having supply
and discharge ducts through said housing for cir
culating cooling liquid through said recess.
2. A fuel cooled atomizer for internal combus
tion engines employing solid injection of fuel
comprising a valve housing, a spring loaded in
jection valve therein responsive to periodical in_
0
creases in the fuel pressure, a fuel space in said
housing surroundin'gsaid valve, a duct through
said housing for supplying fuel to said space, av ,
nozzle of cap-‘like shape, a recess in said nozzle
‘constituting a continuation of said fuel space,
2
2,108,647
a seat in said nozzle-cooperating with the inject-x’
tion valve, an orifice in said nozzle at the bottom
of said recess for admitting fuel into the engine
cylinder in cooperation with said valve, an inner
sleeve integral with said nozzle surrounding said
surrounding said valve, a duct through said hous
ing for supplying fuel to saidv space, a nozzle of
cap-like shape, a recess in said nozzle constitut
ing ‘a continuation of said fuel space, a seat in
said nozzle cooperating with the injection valve, 5
recess and extending into the fuel space having
a cylindrical outside to engage the cylindrical in
and a recess in said nozzle between said sleeves
an ori?ce in said nozzle at the bottom of said
recess for admitting fuel into the engine cylin
der in cooperation with said valve, an inner sleeve
integral with said nozzle surrounding said recess"
and extending into the fuel space having a cylin 10
drical outside to engage the cylindrical inside of
said fuel space so as to provide a seal between said
having supply and discharge ducts through said
housing for circulating cooling fuel through said
also integral with said nozzle for affixing the noz
side of said fuel space so as to provide a seal be
tween said inner sleeve and the valve housing,
10 an outer sleeve also integral with said nozzle for
affixing the nozzle to the end of the valve housing,
15
recess.
inner sleeve and the valve housing, an outer sleeve
’ zle to the end of the valve housing, a recess in 15
,
3. A cooled atomizer for internal combustion
enginesv employing solid injection of fuel compris
said nozzle between said sleeves having supply and
discharge ducts through said housing for circu
ing a valve housing, a spring loaded injection ’ lating cooling liquid through said recess and a
valve therein responsive to periodical increases face in the inner wall of the outer sleeve cooper
ating with a corresponding face at the bottom 20
20 in the fuel pressure, a fuel space in said housing
portion of the valve housing to form a seal be
surrounding said valve, a duct through said hous
ing for_ supplying fuel to said space, a nozzle of tween said recess and the outside.
5. A cooled atomizer for internal combustion
cap-like shape, a recess in said nozzle constitut
_ ing a continuation of said fuel space, a seat in
25 said nozzle cooperating with the injection valve,
an ori?ce in said nozzle at the bottom of said
recess for admitting fuel into the engine cylin
der in cooperation with said valve, an inner sleeve
integral with said nozzle surrounding said recess
30 and extending into the fuel space having a cylin
drical outside to engage the cylindrical inside of
engines employing solid injection of fuel compris
ing a valve housing, a spring loaded injection 25
valve therein responsive to periodical increases
in the fuel pressure, a fuel space in said housing
surrounding said valve, a duct through said hous
ing for supplying fuel to said space, a nozzle-of
cap-like shape, a recess in said nozzle constitut 30
ing a continuation of said fuel space, a seat in
said fuel space so as to provide a seal between , said nozzle cooperating-with the injection valve, '
said inner sleeve and the valve housing, an outer
ori?ces in said nozzle at the bottom of said re
sleeve also integral with said nozzle for affixing
35 the nozzle to the end of the valve'housing, a re
cess in said nozzle between said sleeves having
supply and discharge ducts through said housing
for circulating cooling liquid through said recess
cess for admitting fuel into the engine cylinder
in cooperation with said valve, an inner'sleeve 35
integral with said nozzle surrounding said recess
and extending into the fuel space having a cylin
drical outside to engage the cylindrical inside of
and a welded seam along the upper edge of said
40 sleeve to form a seal between said recess and the
said fuel space so as to provide a seal between said
inner sleeve and the valve housing, an outer sleeve 40
also integral with said nozzle for afl‘lxing the noz
zle to the end of the valve housing and a recess in
outside.
.
4. A cooled atomizer for internal combustion
engines employing solid injection of fuel com
prising a valve housing, a spring loaded injection
valve therein responsive to periodical increases
in the fuel pressure, a fuel space in said housing
said nozzle between said sleeves having supply
and discharge ducts through“ said housing for
circulating cooling liquid through said recess.
'
_JOHANNES JAN BROEZE.
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