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Патент USA US2109783

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March 1, 1938.
c_ G_ A_ ROSEN
ENGINE
2,109,783
'
Filed Oct. 14, 1933
g3
-
2 Sheets-Sheet 1
94
INVENTOR.
Can G. F). Ros-EN
A TTORNEY.
March 1,1938.
c. G. A. ROSEN
2,109,783
ENGINE
Filed Oct. 14, 1953
‘2 Sheets-Sheet 2
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INVENTOR.
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CARL G. F). Eossw
.A_ TTORNE Y.
' Patented Mar. 1, 1938
- 2,109,733
~ UNITED STATES PATENT OFFICE
~ 2,109,783
ENGINE
Carl G. A. Rosen, Oakland, Calif., assignor to
Caterpillar Tractor 00., San Leandro, Calif.,
a corporation of California
Application October 14, 1933,,Serial No. 693,595
' 11 Claims.
(61. 123-139)
removed therefrom, the relation‘ of certain of the
This present invention relates to compression parts eliminating the use of long fuel conduits.
The portion of the fuel injection system not dis
- ignition and the like engines, and more particu
_ larly to the provision of a fuel injection system closed in detail is fully described in my copending
s
‘STATEMENT or Invmzrron
‘’
therefor.
'
‘
>
~
It is an object of the invention to provide an
efiicient, compact fuel injection system which is
readily assembled on the engine or disassembled
therefrom. .
10
Another object of the invention is to provide
a fuel injection system for compression ignition
and the ‘like engines having a plurality of parts
adapted to be mounted as a unitary assembly on
_
the engine.
I
Another object of the invention is to provide
a fuel ?lter having a plurality of ?ltering ele
ments which are easily removed forlcleaning or
replacement.
,
'
Another object of the invention is to provide a
application, Serial No. 684,179, ?led August 8,
1933.
.
>
.
.
Each fuel injection nozzle 4 (Fig. 1A) is con
nected by means of conduit III to a fuel injection
pump ll (Figs. 1 and 1A) from the discharge end
of which, a measured quantity of fuel is forced 10
under pressure into the fuel injection nozzle as
sociated therewith. Each nozzle 4 (Fig. 1A) is
suitably mounted in cylinder head Sand injects
fuel through a single discharge ori?ce into pre
I combustion chamber 6 formed therein. Each
precombustion chamber 6 communicates through
restricted orifices with a main combustion cham
ber formed between the bottom wall of head 5
‘and a piston ‘I in engine block 8.
>
>
Pumps l I (Fig. ,1) are mounted in fuel injectio
and the like engines, said system including single pump housing ,9, which is suitably mounted on
block 8. All of the pumps contain plungers
discharge ori?ce fuel injection nozzles and a two
stage ?lter for filtering the fuel supplied thereto. which are actuated in timed relationship ‘by
20 fuel injection system for compression ignition
'25
Another object of the invention is to provide a
fuel injection system for compression ignition
and the like engines, the parts of which are easily
accessible for inspection or repair.‘
'
-
Other objects will appear as the description
progresses.
30
Fig. 1 is a fragmentary side elevation of a com
pression ignition engine disclosing the fuel in
jection pump housing mounted on the engine
block and. the fuel transfer pump and fuel ?lter
-
Fig. 1A is a schematic view illustrating a part
of the fuel injection system.
49
Fig.
Fig.
Fig.
Fig.
_
2 is a section on the line 2-2 in Fig. 1.
3 is a section on the line 3.—3 in Fig. 1.
4 is a section on the line H in Fig. 1.
5 is a detailed view taken on the line 5-5
in Fig. 2.
-
Fig. 6 is a fragmentary section takenon the
line 6-6 in Fig. 5.
45
through the nozzles in accordance with the ?ring
order of the cylinders. Each pump is connected
by ?tting II to fuel manifold I6 to which fuel
is supplied from the tank, by means to be de
' scribed. In actual operation, the entire system
is always kept full and solid with fuel.
Y
DEscarP'noN on Fmunns
35 mounted on the pump housing.
means of cams on camshaft l2 to force fuel
DESCRIPTION or Macnmrsu
Fuel injection system
The fuel system is of the solid injection type in
which only fuel—not mixed with air—is injected
50 into the-combustion chambers of the engine, in
an atomized state by the fuel injection nozzles.
The system is designed to preclude air from be
coming entrappped with the fuel. The struc
' ture of the system provides a unitary assembly
55 which can be easily assembled on the engineer
Means is provldedfor supplying fuel to the
fuel injection pump manifold [6 (Fig. 1). In
order that the fuel supply shall be' adequate for
all demands of the fuel injection pumps, an ex
cess quantity of fuel is pumped from a main fuel
supply tank, by means of a fuel transfer pump.
The excessquantity of'fuel above the require
ments of theme] injection pumps, is by-passed
‘back to the fuel tank.
In practice, about 10 ‘
times the quantity of fuel necessaryv for- the fuel
injection pumps, is handled by the fuel trans
_ fer pump.
The by-passing of the large excess
quantity of fuel back to the maintank, provides
a line of least resistance, so that entrained air
can leave the pressure system and be by-passed
back into the main fuel tank. From the fuel
tank (not shown),.fuel flows under‘ a positive
head through pipe 2| (Fig. 1) to‘ the suction
side of fuel transfer pump 22. Fuel transfer
pump 22, which is driven from the pump actu 60
ating camshaft, is of such design'as to with
draw always an excess quantity of fuel from the
fuel tank and by-pass that excessv quantity
through pipe .23v to the fuel tank.‘ From fuel
transfer pump 22, a portion of the fuel is formed 55
1
2
2,109,788
through pipe 24 into fuel ?lter 26, which has a
formed (Fig? 3) a pair of apertures 63, 64
direct connection with fuel injection pump mani
aperture 63 is at the suction side of the pump
gears, and the other aperture 64 is at'the dis
charge side of the pump gears. Aperture 64
fold
l6.
'
'
.
Fuel transfer pump
As described herelnbefore, the fuel transfer
pump performs the functions of charging the in
dividual fuel injection pumps for each cylinder
by providing a constant head of air free fuel,
and drives off air entrained in the fuel system
10 by the by-pass of a large volume of excess fuel.
The fuel transfer pump is attached outside the
injection pump housing to prevent contamina
tion of the lubricating oil by fuel'leakage. The
fuel transfer pump is driven from the pump actu
15 ating camshaft, the drive shaft therefor extend
ing within thefuel injection pump housing.
Fuel transfer pump 22 (Figs. 1 and 2) includes
base 3| secured to housing 32 by screws 33.
Housing 32 terminates at its upper end (Fig. 1) in
20 ?ange 34 engaging corresponding ?ange 36 of _
bracket 31 which extends within and ‘closes, an
aperture in fuel pump housing 9. Screws 38
extend through apertures in ?anges 34, 36 and
have threaded engagement with said housing 3
25 to secure pump, 22 thereto.
The drive connection for the fuel transfer
pump is established by the operation of securing
the pump to the fuel injection pump housing.
Pump drive shaft 4| (Fig. 1) is 'journaled in boss
30 42 in bracket 31 and'boss 43 in housing 132, and
has gear 44 secured on the upper end thereof
and meshing with gear 46 integral with camshaft
l2. When pump 22 and bracket 31 are secured to
housing 9 by screws 38, gears 44, 46 are engaged.
Sealing means are provided for preventing pas
sage of any lubricant from the fuel injection
pump housing into the fuel transfer pump, and
for preventing passage of any fuel from the trans
fer pump into the fuel injection pump housing.
40
Said sealing means includes packings 5|, 52 seat
‘ed in bracket 31 and housing 32, respectively, and
engaging shaft 4|. Compression spring 53 is placed between suitable retainers engaging the‘
opposed faces of said packings to maintain said
45 packings in tight engagement with drive shaft
4|. It is to be noted that packings 5|, 52 have ,
inwardly diverging end surfaces whereby the
pressure of spring _53 is appliedmost advanta
geously to maintain such engagement.
50
_
It is believed obvious from the foregoing that
the above-described construction lends itself
readily to assembly and disassembly, and that
effective means are provided for sealing the lubri
cating and fuel oils from each other. It is to be
55 noted that the operation of securing the bracket
to the housing establishes a driving connection
between the drive shaft and the camshaft.
The transfer» pump proper is mounted in hous
' ing 32 and provides means for supplying a con
'60 stant head of air free fuel to the various fuel
injection pumps, a large volume of fuel being
by-passed and returned to the fuel tank carrying
with it any air bubbles entrained in the fuel.
Shaft 4| (Fig. 3) carries pump gear 56 meshing
65 with a similar gear on stub‘ shaft 51 ir-pump
chamber 58 formed by a recess in the bottom of
upper casing part or housing 32, which is closed
One
(Fig. 2) leads to an end of an upper passage 64A
formed in lower part 3|; and said end of passage
64A communicates with a downwardly extending
passage 65 also in lower part 3|. Passage 65 in
turn communicates'with a lower cross passage 66,
formed in the bottom of part43l. Passage 66 10
communicates at its discharge end-with passage
61 which is threaded for connection with pipe 23
(Fig. l), which by-passes the fuel back to the
tank. In passage 66 (Fig. 2) is positioned a
hand-operated plug valve 68 which has a large 15
aperture 69, whereby passage 66 can be opened
and closed. Small aperture 10 invalve 68' at
right angles to aperture 69 provides a pressure
relief passage when the valve is in closed position.
Between pump chamber 58 and passage 66 is 20
mounted a valve (Fig. 2), including _a hollow
sleeve ‘II ?tted closely in an end of passage 64A
and provided with spaced pairs of upper and
lower apertures 12 and 13, respectively. When
the pump is not operating but when the fuel in 25
jection system is being primed, as will be herein
after explained, aperture 63, at the suction side
of the pump gears, allows‘ fuel to ?ow transverse
ly through sleeve 1| by means of opposed aper
tures ‘l2, and then through passage 14 which com 30
municates with the discharge end of passage 66
and with lower apertures ‘I2. Adjacent the closed
end of passage 64A, sleeve ‘H is formed with aper
ture 15, which is closed normally by piston valve
member 16. When piston 16 is moved to the right 35
as viewed in Fig. 2, fuel ?ows through aperture -
‘l5, apertures 13, around-reduced portion ‘HA of
sleeve ‘II, and apertures 12 to passage 14. Ad
justing screw 11 is threaded in sleeve ll whereby
the pressure exerted by spring 18 on piston 16 is 40
adjusted. Lock nut 13 maintains screw 11 in
adjusted position, cover 86 being provided to pre
vent tampering with the adjustment.
'In' operation, the fuel transfer pump works as
follows: Before the engine is started, hand-open 45
ated valve 68 is turned to place its aperture 63 in
communication with passage 66.
This allows fuel
to ?ow from the tank by gratrity through pipe 2|,
to the inlet side of pump chamber 58, down
through aperture 63, through upper aperture 12,
through passage 65, aperture 64, passage 62, and
out of pipe 24 to “the fuel’fllter. During the de
scribed ?ow of the fuel, the pump» is not being
actuated because the engine is dead. The gravity
?ow of the fuel, before the engine is started, is to
insure that the entire system is solid with fuel.
Also, the gravity ?ow with valve 68 open, pro
vides means for priming the entire system with 60
fuel should any portion thereof be removed for
cleaning etc., and then replaced.
When it is desired to start the engine, valve 68
is closed, the position shown in Fig. 2. Upon
starting of the engine, fuel will be drawn by the
pump gears, to the discharge side of the pump,
from which the engine-demand stream of fuel
by the upper surface of lower casing. part 3|. . will ?ow to the fuel oil ?lter, via passage 62, and
Chamber 58 (Fig. 3) communicateswith'aper
70 ture 6| at the suction side of the gears, which is
threaded ‘for connection with pipe 2| which leads
from the ‘fuel tank. The discharge end of cham
pipe 24. Surplus or‘ excess fuel ?ows down
through aperture 64 into passage 64A, from which 70
parallel paths of or a divided flow are provided
to passage 61 leading to the fuel tank. . One of
said parallel paths or separate divisions of ?ow
part 32.with pipe 24 connected to fuel ?lter 26v leads through valve aperture 15, sleeve apertures
, ber 53 communicates, through passage 62 in upper
75 (Fig. 1).' 2 In the bottom wall of chamber 58 are
'
'
50
across sleeve ‘II, through lower aperture 12, pas
sage ‘l4, passage 66, aperture 69, in valve 68, up
13, around sleeve 1|, through lower aperture 12,
2,109,788
passage 14, and passage 88, to passage 81. The
second of the parallel paths or divisions of [?ow
3
‘fuel manifold’ I8 is directly secured. Access is
provided to the ?ltering elements by means of
leads from the left end of passage 84A‘ (as viewed detachable covers, the lower set of elements be
in Fig. 2) through passage 85, andpassage 88, by , ing mounted on one of said covers, which cover
means of restricted aperture 18 in valve 88, to also provides‘ communication between. the lower
passage 61 to the fuelsupply tank. Also, during and upper compartments. Thus, it is seen that
operation of the pump some of the fuel being the ?ltering elements can be installed easily and
spumped through aperture 84 on the discharge are readily removable for cleaning or replace- ,
side of the pump gears and through aperture 15, ment.
I
10 will ?ow through aperture 63 on the suction side"
' Filter assembly 26 (Figs. 1 and 2) includes 10
of the pump gears. Spring 18 is set to yield at a ' housing 8| having integral ?ange'82 by means
pressure'of approximately 15 pounds to insure a of which screws 83 securethe fuel ?lter to hous
constant head of fuel at the fuel injection pumps.
ing 9, suitable communicating apertures being
Small aperture 18, in valve 68, provides a con
stantly open by-pass, to accommodate certain op
erating conditions of- the pump. The size of the
aperture is sufficiently small so that the desired
head of fuel is maintained. The provision of
separate or divided paths of ?ow in the by-pass
provided as described later. Flange 82 (Fig. 1)
20 line prevents surgesdn the fuel chamber, thereby
providing a constant pressure head in the dis
engages thrust plate l2Al'on camshaft I2 to lo 15'
cate said camshaft in housing 8. Said housing 8|
(Fig. 2) is open at the top and has top cover 88
secured thereto by screws 81 to close said opening,
a suitable gasket being interposed. Said cover 88
‘ closes an upper compartment formed between 20
charge line leading to the fuel injection pumps.
Thus, it is seen that the fuel transfer pump
provides a constant head of air free fuel, driving
25 off air entrained in the fuel by virtue of the ac
tion of the pump gears 58 and 51, and because of
the provision of the separated passages. These
separated passages not only prevent surges but .
provide, by enabling a divided ?ow of the excess
30 fuel to the passage I51 and into by-pass pipe 23,
a line of least resistance so that entrained air
will leave the pressure system and be by-passed
back. to the main fuel tank along with the excess
fuel. Not only do these separated passages pro
35 vide a line of least resistance for driving off the
entrained air, but they eliminate‘ the possibility
of turbulent currents existing where a ?ow of fuel
encounters resistance and which lsv apt to result
in deleterious emulsi?cation‘of the fuel and air.
40 It is to be noted that the above-described con
struction provides a mounting of the pump per
mitting quick assembly or disassembly thereof on
the engine, while providing an effective seal be
tween the lubricant for the fuel injection pump
45 drive and the fuel passing through the fuel trans
fer pump.
,
said cover and apertured wall 88. Spaced below
wall88, inclined wall 89 is provided to form upper
?ltering compartment 9| and lower ?ltering com
partment. 82. Communication between ?ltering
compartments BI and 82 is established through 25
cover.93 closing apertures, leading from said com
partments and secured to housing 8| by screws 84.
Thus, it is seen that the fuel ?lter housing is
divided into a plurality of compartments. The
?rst or lowest compartment receives fuel from 30
the transfer pump and has the ?rst stage ?lter
ing elements mounted therein; the fuel is trans
mitted through the ?rst stage ?ltering elements
to the second compartment which receives the
partially ?ltered fuel and has the second stage 35
?ltering elements mounted therein. The third
compartment receives the completely ?ltered fuel
which has passed through the second stage ?lter
ing elements, and has a plurality of outlets lead
ing to the- fuel gauge, to a valve for releasing 49
any air entrained in ‘the fuel, andto the fuel
manifold, respectively. Compartment 82 (Fig. 2)
receives fuel through conduit 24 from the fuel
transfer pump and has the primary or ?rst stage
?ltering elements disposed therein, said elements
45
being placed in said compartment when cover
83 is secured to housing 8|. _ A plurality of pri-~
Fuel?lter
In internal combustion engines of any type, it is mary ?ltering elements are provided, only one
of which is shown, and each ?ltering element
50 desirable that the fuel be ?ltered to remove any includes alternate‘ ?at disks held close together, 50
foreign, matter, but in compression ignition en
gines and the like, such as Diesel engines, it is and formed to provide for ingress_ofa fuel at
essential that pure fuel be suppliedto the in their edges, and egress of fuelthrough acentral
aperture to the second compartment, the open
jection pumps and injection nozzlesso that no‘ ing
in the "edges of the disks being suf?ciently
particles are present in the fuel to injure-the narrow
to prevent entrance of foreign particles
pumps and nozzles, or to prevent seating of the except ‘of a very small size. Each primary ?lter 65
needles of the fuel injection nozzles.‘
‘ '
According to the instant invention, a fuel ?lter
is provided which has two stages of ?ltering
means arranged in series; the ?rst stage is of the
60
non-collapsible type'and removes all relatively
large foreign particles from the fuel and pre
sents a relatively large ?ltering area, and the
second stage removes all the smaller particles and
any ?brous matter which may pass through the
ing element being formed of disks is non-collaps
ible, so that it resists pressure caused by foreign ' '
matter restricting the ?ow of fuel therethrough
and causing increased pressure on the walls
thereof.
The speci?c construction of the disks is illus-‘
trated in Figs. 5 and'6. One type of disk IN
is provided with a‘ solid outer edge from which
are spaced a plurality of arcuateslots I82. At 65
its center,_disk |8| is provided with a hexag
onal aperturer The other type of- disk I83 is
glnes to provide a plurality of stages of filteringv shown
above disk I8l. Disk l83‘has a plurality
elements, as a single stage ?lter would be apt to of recessed portions around its edge formed be
become clogged due to the large amount of ' tween a plurality of radial extensions I84, while
foreign matter usually present in fuel oils suitable at its center a hexagonal aperture-is provided 70
for use in such engines. The two ?ltering means in the same manner as in disk I8I. It is to be
are mounted in vertically disposed compartments noted that thenradii of the recesses formed be:
in a housing which provides an end cover for tween extensions I84 coincide with the innerrsidii
75 the fuel injection pump housing and to which the of arcuate slots I82 in disk |8| while the radial 75.
?rst-stage. I have found itvery desirable in
[ ?lters for compression ignition and the like en
4
‘2,109,788
length of extension I04 is equal to the radius of
disk IOI. Each extension I04 coincides with a
solid portion in disk IOI between adjacent arcu
ate slots
I02.
I
‘
‘
The hexagonal central apertures enable main
taining alternate disks IOI, I03 in their adiusted
position by means of hexagonally sectioned sleeve
I06. In assembly, the disks are placed alter
nately over sleeve I06, after which the ends of
edges to a central recess I33, which has com
munication with the atmosphere through ?tting
I34 as controlled by valve screw ‘I36. Valve I36
is used principally when the fuel system is ?rst
installed to permit escape of any air entrained
in the fuel. The slanting contour of the bottom
face of cover 36 insures recess I33 being the
highest point of the ?lter in any tilted position
of the engine. Thus no air pockets can occur
10 sleeve I06 (Fig. 2) are ?anged outwardly as at ‘in the ?lter when the fuel injection system is 10
I01, whereby the plurality of disks mounted
thereon are permanently retained in place, the
‘ sleeve being of sumcient length to permit sepa
15
ration of the disks for cleaning.
Each primary ?lter element or cartridge is
mounted on cover 93 (Fig. 2) by means of stud
I08 (Fig. 2) threaded in boss I03 of cover 93
and extending through sleeve I06. As seen in
Fig. 1, three bosses I03 are provided for mount
20 ing the three primary ?lter elements. Nut III
(Fig. 2) threaded on the opposite end- of stud
I08 clamps the plurality of disks together be
primed with the engine in a tilted position.
The third outlet from the upper compartment
is through passage I“ (Fig. 4) which has com
munication through a plurality of apertures I42
with internal passage I43 in ?tting I44. Fitting 15
vI44 provides a means for securing the fuel'mani-_
fold I6 to the fuel ?lter and passes fuel there
from to said fuel manifold. Said ?tting I44 ex- ,
which are ?ltered out of the fuel. Arcuate slots
tends through aperture I46 in boss I" of hous
ing BI and has threaded engagement at I43 with 20
fuel manifold I6. Suitable gaskets are interposed
between manifold I6, ?tting’- I44, and boss I41.
Manifold I6 extends within fuel injection pump
housing 3 and has a boss I6A associated with
each fuel injection pump, adapted to receive a
?tting I3. Each ?tting I3 serves to secure said
manifold to the associated fuel injection pump,
being of reduced diameter at I3A to pass fuel
I02 with said recessed portions provide a‘passage
to said associated pump.
tween annular face II 2 of cover 33 and nut III.
When clamped in position, the recessed portions
in alternate disks I03 (Fig. 6) provide means
for ingress of fuel to the ?lter element, the thick
ness of disks I03 determining the size particles
‘
From ‘the foregoing description, it is seen that 30
80 through the primary ?lter element so that the
partially ?ltered fuel can pass upwardly through the °:fuel ?lter includes two phases of ?ltering
the element through passage H3 (Fig. 2), from I elements, the ?rst of which removes larger for
eign particles, while the second removes smaller
compartment 32 to the second ?ltering compart
particles. It is to be noted that the arrange-_
ment 3|.
.
In the second ?ltering compartment (Fig. 2) , ment of the fuel compartments and ?lter elements provides a path of fuel ?ow which rises at
a plurality of secondary ?ltering elements or car
\ tridges are mounted.
Each of the elements in
cludes a cylindrical frame II6 having an annular
?ange III at the top seated in recess II3 formed
around an aperture in wall 33. Integral boss
H9 disposed centrally at the top of frame H6
and extending upwardly therefrom provides a
seat for spring I2I which surrounds said boss
and is compressed between boss I20 of top cover
86 and frame II6. Thus, it is seen that the sec
ondary ?ltering elements are held in place by
the top cover and can be lifted out for cleaning
or replacement when the top cover is removed.
_ Further, the strength of spring I2l is such that
I50 if the ?ltering elements held in place thereby
should become completely clogged, the developed
pressure will cause said spring to yield whereby
the ?ltering elements will act as valves and will
be lifted out of recesses H3 to permit a con
65 tinued flow of fuel. This feature insures a con
stant fuel supply for the fuel injection pumps.
Frame II6 (Fig. 2) is provided longitudinally
of its cylindrical portion with elongated slots I22
which provide for ingress of‘ fuel. Slots I22 are
all times, provision being made against any air
pockets which would permit the entraining of
any air in the fuel during operation. It is to be
noted that the detachable cover 03 which pro
40
vides a path of ?ow between the primary and
the secondary ?ltering compartments also serves
to mount the primary ?ltering elements.
.
The compact arrangement of the fuel transfe
pump and‘fuel ?lter on the fuel injection pump 45
housing 0 provides for ready attachment or re
moval of these parts as a unit, so that assembly or
disassembly thereof is facilitated. It is to be noted
also that this construction provides a materially
simpli?ed engine block structure, as it is unneces 50
sary to provide means for mounting the various '
elements individually on the block. It is to be
noted also that the ?lter is placed on the pressure
side of the fuel tr‘ansfer pump, so that the fuel is
?ltered under pressure, and so that only the fuel
conducted to the fuel injection pumps is ?ltered.
Therefore, I claim as my invention:
'
1. In a compression ignition and the like en
gine having a fuel injection system, a unitary as
sembly adapted to be connected in said system 60'
I23 which is welded to‘said» frame H6 at its ‘and to be mounted as a unit on the engine, said
ends as indicated at I24. Filtered fuel which is assembly comprising a fuel injection pump hous
admitted within frame II6 through screen‘ I23 ing, a plurality of fuel injection pumps mounted
passes upwardly through a plurality of apertures on said housing, a fuel transfer pump mounted
65 I26 (Figs. 2 and 4) formed in the top wall of on said housing exteriorly thereof, a fuel ?lter
said frame II6 around boss II3, to the third mounted on said housing exteriorly thereof, and
a manifold extending from adjacent said fuel
compartment of housing 0|.
?lter along and connected to each of said fuel in- _‘
As stated above, the third compartment is pro
vided with three outlets. At one end thereof,
2. In a compression ignition and‘the like engine 70
70 ?tting I3I (Fig. 4) communicates therewith and
having an engine block, a housing adapted to -be '
with conduit I32 leading to a suitable fuel pres
sure gauge, not shown. The second outlet (Fig. mounted on, said block, a plurality of fuel in-.
~ 2) is provided at the highest portion of the fuel jection pumps mounted on said housing, a cam
?lter for venting any entrained air. The bottom shaft in said housing for operating said pumps,
76 face of cover 36 converges upwardly from the a fuel transfer pump for supplying fuel to said‘ 75:
covered by cylindrical extremely ?ne__mesh screen
jection pumps.
-
_ a
-
5
2,109,783
fuel injection pumps, said fuel transfer pump
comprising a casing detachably secured to said
gine having an engine block, a fuel injection
housing and a drive shaft mounted in said cas
block, a fuel ?lter secured to one face of said
ing and having operative engagement with said
housing, a fuel transfer pump secured to an
other face of said housing, and a conduit con
nection between said transfer pump and said fuel
camshaft, a fuel ?lter detachably secured to said
housing, and a fuel manifold secured to said
?lter and connected to each of said fuel injection
pumps.
-
3. In a compression ignition and the like engine
10 having a fuel injection system, a unitary as
sembly adapted to be connected in said system
and to be mounted as a unit on the engine, said
assembly comprising a fuel injection pump hous
ing, a plurality of fuel injection pumps mounted
15 on said housing, a fuel transfer pump mounted
on said housing exteriorly thereof, and a fuel
?lter mounted on said housing exteriorly there
of, said fuel transfer pump being adapted to
supply a constant head of ?ltered fuel'to said
20 fuel injection pumps.
4. In a compression ignition and the like engine
having an engine block, a housing adapted to‘ be
mounted on said block, a plurality of fuel» injec
tion pumps mounted on said housing, a cam
25 shaft in said housing for operating said pumps,
- a fuel transfer pump for supplying fuel to said
fuel injection pumps, said fuel transfer pump
comprising a casing detachably secured to said
housing exteriorly thereof and a drive shaft
30 mounted in said casing, extending into said hous
pump housing adapted to be mounted on said
?lter.
.
,
1
8. In a compression ignition and the like en
gine having/ an engine block, a fuel injection
pump housing adapted to be mounted on said '
block, a plurality of fuel injection pumps in said '
housing, a fuel ?lter secured to one face of said
housing, a manifold connected to each of said
fuel injection pumps for conducting fuel from
said ?lter to said fuel injection pumps, a fuel 15
transfer pump secured to another face of said
housing, and a conduit connection between said _
transfer pump and said fuel ?lter.
9. In a compression ignition and the like en
gine having an engine block, a housing adapted
to be mounted on said block, a plurality of fuel
injection pumps mounted ‘on said housing, a fuel
?lter mounted on said housing, a ‘manifold’ con
nected to each of said fuel injection pumps for
conducting fuel from said ?lter to said injection
pumps, the connections from said manifold to
said injection pumps being higher than the con
nection from said ?lter to said manifold, a fuel
transfer pump mounted on said housing, and a
conduit connection extending upwardly from said ‘’
ing and having operative engagement with said transfer ‘pump to said ?lter.
camshaft.
fuel injection pumps, said fuel ?lter having a
wall portion thereof adjacent said housing wall
for maintaining said camshaft in axial position
gine, a. fuel injection assembly adapted to be
attached to said engine comprising a fuel injec
in said housing.
tion pump housing having means for detachable
housing adjacent an end of said camshaft, and
a fuel manifold secured to said ?lter and to said
'
6. In a fuel injection system, a fuel injection
pump housing having a plurality of fuel injection
pumps mounted therein, said housing having an
opening in one wall thereof, a fuel ?lter compris
ing a casing closing said opening, and a fuel
50 manifold extending from within said fuel ?lter
through said opening and into said housing,
means securing said manifold to said ?lter, and
means securing said manifold to each of said
fuel injection pumps.
55
gine, a fuel injection assembly adapted to be at
tached to said'engine comprising a fuel injection
pump housing for mounting on said engine and
containing a plurality of fuel injection pumps, a
fuel transfer pump for supplying fuel from a
source to said fuel injection pumps and mounted
on said housing exteriorly thereof, and a fuel
?lter mounted on said housing exteriorly thereof. 4 0
11. In a compression ignition and the like en
a fuel ?lter detachably secured to a wall of said
45
'
10. In a compression ignition and the like en
.
5. In a compression ignition and the like engine
having an engine block, a housing adapted to be
35 mounted on said block, a plurality of fuel injec
tion pumps mounted in, said housing, a cam
shaft in said housing for operating said pumps,
40
SI
connection to said engine and containing a plu
45
rality of fuel injection pumps, a fuel transfer
pump for supplying fuel from a source to said
fuel injection pumps and detachably mounted on
said housing exteriorly thereof, a fuel ?lter de
tachably mounted on said housing exteriorly
thereof, and detachable conduit connections be
tween said transfer pump and said fuel ?lter and
between said fuel ?lter and said fuel injection
pumps.
'7. In a compression ignition ‘and'the like en- . .
I
CARL G. A. ROSEN.
55.
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