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Патент USA US2405163

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B. G. PARSONS
FUEL INJECTOR
Filed. Dec. 14, 1944
s sheetséshee't 1
,IINVENTOR.
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BYG. mans
FUEL INJECTOR
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Filed Dec. 14, 1944'
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3 shee’cyswsheet 2
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£59
'JNVENTOR.
6,’ PariaM-?
BY
/7 770F515 Y5.
Patented Aug. ‘6, i946
2,405,153
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UNHTED "STATES PATENT GFFIQE
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FUELINJECTOR
" Ben G. Parsons, Grosse Pointe;
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assignor to " i
Fuel Charger Corporation, Detroit, Mich., a
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corporation of Michigan
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_' Application December 14, 1944, Serial No. 568,177
11 Claims.
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(01. ‘103-251 \ .'_' "
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~ The present invention relatesto improvements
in liquid pumping devices and particularly to fuel
’combustion engine cylinders. In the particular -'
embodiment illustratedthe pump is designed to
distribute to six cylinders, by Way of example;
-It will be obvious that it could be constructed to
injectors for use with internal combustion en
gines._
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. Theprimary objectof the present invention is
; deliver to more or less cylinders. For a six-cylin-'
to provide improvements in devices of the type
_ mentioned whereby asingle plunger-is employed
der engine only one of the-injectors of the present
invention would be needed; and for a four-cylin
der engine one designed to deliver to four cylin
ders would be needed and would have four deliv-=
ery ports vwith corresponding changes in the de
to accurately meter and distribute liquid, fuel,
such as gasoline, to a multiplicity of internal com¢
bustion engine cylinders, thereby effecting con
siderable
economy.
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livery ratio and cam design. Also, it is 'contem-'
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Other objects of the invention will becomeap
plated‘ that for 'twelve- or eighteen-cylinder en
parentfrom the speci?cation, the drawings re‘
lating thereto, and from the claims hereinafter
set forth.
gines, a corresponding multiple of the injectors‘
of‘the-present invention could be employed, the‘
number depending upon whether the. particular-7
15
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In the drawings, vin which like numerals are
injector was designed for: six or‘ four delivery
used to designate like parts in the several views.
throughout:
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ports.
Fig. 1 is a vertical ,crossesectional view, with
parts in elevation, of a fuelinjector embodying
ternal' combustion engine;
the engine roam vshaft 2 which is mounted -with-'
in the crankcase in- the usual way. ~:.A- beveled
gear 3 is ?xed to one end‘ of the cam shaftZ-for
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Fig.v 2 is a top plan view‘of the injector shown
in Fig; 1 and with such injector removed’from at-_
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rotation therewith and meshes with anotherfbevi
‘>- eled géar'4'which' is rotatably mounted within'the
crankcase" I.‘ The'shaft'of the beveled gear 4 has .
’ tachmentto
Fig. 3 is a‘vertical
the crankcase}
cross-sectional
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view. of-the.
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structure shown in Fig. 15 taken substantially
along the line 3—3 ofFig. land with the plunger.
at the beginning of the delivery stroke;
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, Fig. 4 is a partial cross-sectional view similar to
a'depending transverse tongue-5 which‘ is‘con;
nected'to'f the injector and serves to'operate‘the
injector in a‘m'anner that will be more apparent‘
i from the following description. 1
' The "fuel 'injecto'r‘i's ‘generally’ indicated‘ at 6
Fig. 3, but. taken ata-right angle thereto and
and comprises a plunger‘ housing "1 ' formed'with'
showing the 'parts in..a,di?erent.operating posi
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a central axial bore'B therethrou'gh. ' The housing"
1 has‘formed therein a plurality of radially ex-j
tending’and equally, spaced‘ inlet bores or portsv 9
.
Fig. 5 is a cross-sectional view taken substan-.
tially along the line 5-.—_5 of Fig. 4; ..', '..'
Fig. 6 is a cross-sectional. view taken,
line6--6ofFig.3;.
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imagine.
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which open into ‘the bore 8.- An annular, external
recess'or groove I0 is ‘formed around, the housing
1 and communicates with the outer‘ ends of pas
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Fig. '7 is an exploded view of theparts makin
up the injector assembly; ;
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, sageways v9. Thereare six off‘such bores 9 in the
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Fig. 8 is a cross-sectional-view of the cam ring;
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plunger; and
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Fig. 11 is aninverted, developed,-elevational
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(not shown) leads to the source of fuel supply.v
The ?tting l l is mounted on the ‘housing 1 and
hasrubbersealing rings l 3..'and l4 disposed on 0117
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-The present invention relates to improvement
over the structure disclosed and..claimed in the
copending application of Ben G. Parsons Serial
sides thereof, the ring ‘l3 abutting against
so.' posite.
a shoulder formed on the casing "l and the ring
I4 being disposed between the adjacent faces'of
No..561,958,
F In general,
?ledNovember4,
the injector of the
1944.
present
,
.. invention
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employs a single cylinder for distributing liquid
fuel, such as vgasoline, to a multiplicity of internal.
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*' tube or conduit may be connected. The conduit
view 'of the cam ring showing one of the rollers
in its association therewith.
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chamber therebetween. The ?tting'lll has a tu
bular projection 12 thereon to which a '?exible
'Fig..1-0 is a side elevationalview of. the, pump-.
ing
embodimentillustrated.
‘An inlet tube-?tting vll embraces the ‘casing 1
around the‘recess ID to form an‘jannular inlet
» Fig. 91s a side elevational .viewof the drive
shaft;
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trated as being mounted on a. crankcase l of an
such injector mountedon the-crankcase ofan' in-
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20 internal combustion engine-"It is ‘driven from
features of the present inventioniandz. showing
tion;
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The injector of the present inventionis-illuse
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55.
the ?tting II and the ?tting nut 15. The nut, I5
is. threaded onto athreaded portion formed- on
the exterior surface of thecasing 1.
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A plurality of equally spaced discharge pas
4
8. Such openings are in a, plane axially spaced
from the plane of the inlet passageways 3. The
opposite ends of the passageways l6 communi
drive member 32. The member 32 has another
groove 33 formed in the ‘opposite end thereof
which receives therein the tongue 29. A driving
connection is thus established between the shaft
of the gear 4 and the plunger 25 so that the
plunger 25 is rotated with gear 4. The upper
cate with axially extending openings I‘! formed
in a radially projecting flange {8 of the housing ‘I.
cated at 34, so'that alignment of the plunger
sageways or bores l6 are also formed in the hous
ing 1, the inner ends of which open into the bore
end of tongue 29 is formed on a radius as indi- ‘
There are six of the discharge passageways I6
25 within bore 8 is not disturbed upon rotation
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in the embodiment illustrated, one for each of 10 of member 32.
the engine cylinders. Such passageways are ro-I "
~Member 32 has a pair of diametrically opposed
tatably spaced between the inlet passageways 3. , .Stu‘b, ,axles 35 formed thereon which serve to
This relationship is best seen from a comparison
mount rollers 36. The rollers 36 are retained on
of Figs. 5 and 6.
the stub axles by means of snap rings 31. The
The injector assembly 6' is" mounted to the " rollers 36 are constantly held against the cam
crankcase I by means of mounting bolts l9
surface 38 of a cam ring 39. The cam surface
which are passed through ‘the openings‘ [1. A
38 is. designed to e?ect proper reciprocation of
distributor ring or tube ring 20 is disposed be
the plunger 25 upon rotation thereof, in the
tween the ?ange l8 and the adjacent face of the
present instance being designed with six crests
crankcase I. Sealing. gaskets 2| are disposed 20 and troughs. The cam ring 39 is mounted With
between the facing surfaces of the ring‘ 20 and
the ‘crankcase I and ?ange F8. The mounting
bolts I13 pass through openings l7" formed-in the
in- the wall portion 30 and is held against axial
displacement by-means of a snap ring 40 against
which it bears and‘ which is received within the
annular, internal groove formed in the casing
cam ring 20 and have reduced portions 221 which
form. with such openings l1‘ and the openings» [1 25 portion 39. Itis located in’ its proper rotative
an annular chamber into which the correspond
position by means of a locating pin M which is
ing; passageways l5 open andicommu-nicate.
Distributor tubes or conduits 23,‘ there being
properly located and ?xed to the portion 30 and
which is received within an opening’ formed in
, the cam ring 39.
one for each cylinder, are v?xedly Vmoun'ted on
the ring 20. Bares or passageways 24 are formed 30
It will thus be seen that ‘upon rotation of the
in the ‘ring 20, there being one for each of the
gear 4,.which is timed with the cam shaft 2,
openings f1? and for each of the conduits 23.
the'plunger 25 is caused ‘to rotate and recipro
Each- conduit 23 communicates with? one of the ‘ cate. Reciprocation of the member 32 with re
bores 24‘ and in turn communicates with the
spect to the shaft beveled gear 34 is permitted,
chamber formed between the reduced portion 22 35 due to the tongue and groove connection there
‘and the openings l1’ and IT through ring 20
and ?ange 18 respectively. The opposite ends-oi
the tubes 23- are'each. connected to an injector
:betweenQ When the rollers 36 argon the crests
of the cam 38', the plunger is at the'beginning
of the inlet orsuction stroke, and the six inlet
nozzle (not shown) .. The nozzles are associated
openings-9 are overlapped with the inlet open
with the engine cylinders, as‘ will be understood 40 ings- 21 in the plunger to provide ‘inlet communi
by those skilled in' this art, and may be of the
cation into the interior space 26 within the
type. disclosed in ‘the 'copending. application of
Ben'G'. Parsons Serial No. 546,352; '?led' July
plunger. At this time there isno communica-'
tion between the distributor-port 28 and, any-of
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the passageways [6. When the rollers 36 are on
The hollow delivery pIungerZEis-rotatabIy and 45 the troughs of the cam 38, the plunger’ 25 is at
reciprocally disposed within the bore kernel. has
the end of the intake stroke and the beginning
an: opening through . one end"v thereof "which is in
of the delivery stroke. Further rotation of the
24,1944.‘
open communication with the bore 8. . The? space
plunger brings the'opening 28 into communica
within the hollow 1311111921125? is‘ indicated at 26. ~. tion with one ‘of the passageways l6. At this
The plunger 25 is formed witha‘plurality of 50 time the’ passageways 9* are closed off, There
equally spaced inletxopenings 21 formed-through
are thussix cycles‘of reciprocation of theplunger '
the wall: thereof. adjacent the open end- There
are six of such‘ openings 21 in the‘ embodiment
tion of the plunger‘ the port 28 is brought into
» illustrated, one corresponding to each-cf the: inlet
passageways. 19 and’ having» the;v same ‘equal ‘ spac 55
ing. ; The plunger 25 is also formedwith a single
delivery opening 28 through the wall thereof
which is axially- spa-ced‘from the ports}? and
for each rotation thereof, so; that forlone‘rot'a4
communication with .all of the passageways {6,
in succession.
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A coil spring?
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disposed" withinnthe hollow‘
plunger 25 with one end bearing-against a cen
tering button 43 whichin turn seats, within the
end of space‘26. The opposite end of the, spring
shown in Fig. 4. The port 28 is adapted- to 60 42 is received withina__seat formed within an
which is aligned with one of the ports'21, as .
register with ports H5 in succession in a manner
that will. become more apparent from. the fol
lowing description.
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The plunger 25 is rotated and reciprocated
within the bore 8 to effect delivery of the fuel
through the delivery passageways [6 in succes
sion. - The closed end of the plunger 25 has a
adjustable control piston '44.. ' The control piston
‘44 is slidably received within the open end of
bore 8 and is formed with an axiallreces‘si45
on the opposite side of the separate wall between
it and the spring_42. Another, coil spring ‘4.61. is
disposed within the recess 45 abutting against
the adjacent face 'of the separating. wall with
transversely extending tongue 29 projecting up
the‘oppositeend of the spring abutting against
wardly therefrom. The plunger and tongue
project- beyond the bore 8 within an enlarged 70 threadably connected .to theendpf thenasing
space formed by an integral annularportion. 3!!
of the casing 1. The tongue 5', on the shaft of
the beveled gear 4. also projects, downwardly
Within the spacewithin wall ‘33 and is received
within a groove 3! formed in a drive shaft or 7
1 and has a control levernllllj ?xedthereto... ‘By
adjusting the vrotative'. position of, thecap 41‘ with
the ‘lever. 48, thetensiOn. on spring 46_ is varied
so that. they relative axial positionof pistonlr‘jlll
with respect to- plunger 25 may be’ adjusted.
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This; i'n'effect, varies the ‘amount of fuel con- "
‘spaced fuel-inlet ports through saidcasing com-i. '
tained Ywithin space 26 so that the amount of
fue1 delivered due to the reciprocation of the
municating "withsaid bore, ‘means providingv a‘
plurality of equally" and circumferentially spaced:
plunger 25'may be adjustably varied.
delivery? ports through said casing axially spaced from said inlet ‘ports and communicating with
The lever 1
48 may be adjustably ?xed in the proper position
around the cap 41 so that it maybe suitably
located to adapt it to its particular installation.
The'system employed with the injector of the
said bore, a hollow delivery plungeridisposed‘
within said boreymeansin said plunger'com
municating the interior of'said plunger with said
present invention is what is termed a “dead end”
inlet ports, means in said plunger communicating
system; that is, there is no flow return or spill 10 the interior of said plunger ‘with said delivery
backviin' the system. This is accomplished by
having more inlet openings on the suction than
on the delivery, when only one is ‘open. This
makes it possible to dispense with the use of a
transfer
pump.
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ports, and means to reciprocate and rotate said
plunger to effect delivery of fuel through; said ‘
delivery ports in succession.
15 nal bore within said» casing, means providing a
In the operation of the device above described,
fuel is constantly supplied through tube l2~sov
that there is a constant supply of fuel within
space 'Iil and within the inlet openings 9. With
the plunger 25 in such a rotative position that 20
the rollers 36 are on the crests of the cam 38,
the plunger is at the beginning of its‘ intake
stroke; and as the rollers 36 move'toward the
troughs of the cams; the plunger 25 moves up
an outlet passageway in said plunger communi
cating the interior of said plunger with said de
livery ports, and means to' reciprocate and rotate
said plungerto effect delivery of fuel through
thus drawn into the space 26.‘v When the rollers
36 reach the troughs in the cam 38, the plunger
is at the end of the intake stroke and ‘at‘the
beginning of the delivery stroke. Further rota 30
, such movement communication between open
ings 21 and 9 is cut off; and opening 28 communi
cates with one of the passageways l6 delivering
fuel to the particular cylinder associated‘ with
that passageway throughits particular conduit
23. There are six troughs and ‘crests ‘on the cam
38 so that for each rotation of the piston 25 the
plurality of fuelinlet ports through said casing
communicating with said bore, means providing
a plurality of delivery ports through said casing
axially spaced from said inlet ports and'com
municating‘ with said bore, a hollow delivery
plunger disposed within said bore, means pro-'
viding a plurality of inlet passageways in said
plunger communicating the interior of said
plunger with said inlet ports,_ means providing
wardlyi with the openings 21 overlapping and
communicating with inlet openings 9. Fuel is
tion of the plunger 25 causes the rollers to move
to the crests of the cam, and at the beginning of
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3. ma fuel pump having a casing, a longitudi
said delivery ports‘in succession.
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4. In a fuel pump having a casing, a‘ longitudi
_ nal bore within said casing; means providing a
plurality of fuel inlet ports through'said casing
communicating With'said bore, means providing
a plurality of delivery portsuthrough said casing
' laxiallyspaced from said inlet ports and com
municating with said bore, a’ hollow delivery
plunger disposed within said bore, means pro
viding a plurality of inlet passageways corre
sponding'to the number of said inlet ports in said
delivery port 28 is brought into communication 40 plunger communicating the interior of said
with all of the passageways Iii in succession.
plunger with said inlet ports,- means providing '
When therollers 36 are at the troughs'of the
an outlet passageway vin said plunger communif
cam, only one distributor opening l6
com
cating the interior of said plunger with saidwde-l
munication with the space 26 through the open
livery ports, and means to reciprocate and rotate
ing 28, and all of the inlet openings'il are closed.
said plunger to, effect delivery of fuel through’
When the rollers 35 are at the crests of the cam,
said delivery portsv invsuccession. _
all six inlet openings 9 are ‘in communication
5. In afuel pump having a casing, a longitudi
with the space 26 through openings 21. A uni
nal bore within‘ said casing, means providing .a '
form charge of fuel is thus delivered through the
plurality of 'fiielinlet ports through said casing
port 28 to the delivery ports It in succession as 50' communicating ‘with said ‘bore, means providing
the piston 25 rotates and reciprocates. The
a plurality of delivery ports through said casing
stroke of the piston 25 is constant; but the effec
axially spaced from said inlet ports and com
tive stroke thereof, that is, the amount of con
municating with said'bore, a hollow delivery
?ned fuel delivered through the delivery ports,
plunger disposed within said bore, means provid
may be adjustably varied by adjusting the piston
ing a plurality of inlet passageways correspond
44, as above described.
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ing to the number of said inlet ports in said
What is claimed is:
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1. In a fuel pump having a casing, a longitudi
nal bore within said casing, means providing a
plurality of fuel inlet ports through said casing
communicating with said bore, means providing
a plurality of delivery ports through said casing
axially spaced from said inlet ports and com
municating with said bore, a hollow delivery
plunger disposed within said bore, means in said
plunger communicating the interior of- said
plunger with said inlet ports, means in said
plunger communicating the interior of said
plunger with said delivery ports, and means to
reciprocate and rotate said plunger to effect de
livery of fuel through said delivery ports in suc
cession.
2. In a fuel pump having a casing, a longi
tudinal bore within said casing, means providing
plunger communicating the interior of said plung
er with said inlet ports,.means providing an out
let passageway in said plunger communicating
the interior of said plunger with said delivery‘
ports, and means to reciprocate and rotate said
plunger to effect delivery of fuel through said
delivery ports in succession.
6. In a fuel pump having a casing, a longi- '
tudinal bore within said casing, means providing
a plurality of equally and circumferentially spaced
fuel inlet ports through said casing communicat
ing with said bore, means providing a plurality
of equally and circumferentially spaced delivery
ports through said casing axially spaced from said
inlet ports and communicating with said bore, a
hollow delivery plunger disposed within said bore,
means providing a plurality of inlet passageways
corresponding to the number of said inlet ports
a plurality of equally and circumferentially 75 in said plunger communicating the interior of
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said plunger with said inlet ports,- means provid-»
inletzrDOI'tS, means providing asingle outlet pas; ‘
ing‘ an outlet passageway" in said plunger com
sageway in’ said; plunger‘ communicating the‘ine
municating- the interior of said plunger with said
teriorlof _ said plunger with said delivery ports,
delivery ports, and means to‘ reciprocate and ro
tate said plunger to effect delivery of fuel through
said outlet passageway being axially spaced from
saidinlet passageway a distance greater than the
axial spacing between said inlet and said outlet
ports, and means to reciprocate and rotatesaid
plunger to effect delivery of fuel through said
said-delivery ports in succession. '
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7. In a fuel pump having a casing, a longi
tudinal bore within said casing, means providing
delivery ports in succession.
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a plurality of fuel inlet ports’ through said casing
communicating with said bore, means providing 10 . 10. In a fuel pump having a casing, a longi-.
tudinal bore within said casing, means providing
a plurality of delivery ports through said casing
a plurality of fuel inlet ports in said casing com
axially spaced from said inlet ports and com
municating-with said bore, means providing a
municating with said bore, a- hollow delivery
plurality of delivery ports through said casing
plunger disposed within said bore, means provid
axially spaced from said inlet and communicat- >
ing a pluralityof inlet passageways in said plung
ing with said bore, a hollow delivery plunger
er communicating the interior- of said plunger
disposed within said bore, means in said plunger
withsaid inlet ports, means ‘providing a single
communicating the interior of said plunger with
outlet passageway in said plunger communicat
said inlet ports, means in said plunger commu
ing thefinterior of said plunger with said delivery
nicating the interior of said-plunger with said‘
ports, and means to reciprocate and rotate said
delivery ports, and means to reciprocate and ro-’
plunger to effect delivery of fuel through said
tate said plunger'to effect delivery of fuel through
delivery ports in succession.
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said delivery ports in succession, said last named
8‘ In a, 'fuel pump having a casing, a longi_
means comprising a rotatable member operative
tudinal. bore within said casing, means providing
aplurality of fuelinlet ports through said casing 25 ly connected to said plunger,- and cam means
operably connected, to said rotatable member to
communicating with said bore, means providing
aplurality ,of delivery ports through said casing
effect axial movement of, said member andv said
plunger upon rotation thereof.
axially spaced from said inlet ports and commu
11. In a fuel pump having a casing,‘ a longi
nicating with said bore, a hollow delivery plunger
tudinal bore within said casing, means providing
disposed within said bore, means providing a
a plurality of fuel inlet ports in said casing com—.
plurality of inlet passageways in said plunger
munipating with said bore, means providing a
communicating :the interior of said plunger with
plurality of delivery ports through said casing
saidinlet ports, means providing an outlet pas‘
axially spaced from said inlet ports and com
sageway in said plunger communicating the'in
municating with said bore, a hollow delivery
terior of said plunger with said delivery ports, said
plunger disposed within said bore, means pro
outlet passageway being axially spaced from said ‘
vidinga plurality, of fuel inlet passageways in
inlet passageway a-distance greater than the axial
spacing between said inlet and said outlet ports,‘
and meansxto reciprocate and rotate said plunger
to- effect delivery of fuel through said delivery
ports in succession.
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' said plunger communicating the interior of said
plunger with said inlet ports, means providing
an outlet passageway in said plunger axially
spaced from said inlet passageways and commu» -
, 9. In a fuel pump having a casing,v a, longi
nicating the interior of said'plunger with said
tudinal bore within said casing, means'providing
delivery ports, and means to reciprocate and ro
a plurality of fuel inlet ports through said casing
tate said plunger to effect delivery of fuel through
communicating with said bore, means providing 45, said delivery ports in succession, said last named
a plurality of delivery ports through said casing
means comprising a rotatable member operatively
axially spaced from said inlet ports and ‘commu
nicating with said bore, a hollow ‘delivery plunger
disposedwithin said bore, means providing a plu
connected to said plunger, and cam means 0p
rality of inlet passageways in said‘plunger com
municatingthe interior of said ,plungernwit‘h said
plunger upon rotation thereof.
erably connected to said rotatable member to
effect axial movement of said member and said
BEN G. PARSONS.
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