USRE23268E - Fuel supply apparatus for internal-combustion engines - Google Patents

Description

P 1950 M. J. BERLYN ETAL Re. 23,268

FUEL SUPPLY APPARATUS FOR INTERNAL-COMBUSTION ENGINES Original Filed April 5, 1946 4 Sheets-Sheet 1 INVENTORS. MARTIN J. BETZLYN JOHN J. BRODERICK ATTOE'NE Y.

Sept. 19, 1950 M. J. BERLYN ETAL 23,258

FUEL SUPPLY APPARATUS FOR INTERNAL-COMBUSTION ENGINES Original Filed April 5, 1.94s

4 Sheets-Sheet 2 INVENTORS. MAE'TlN J. BERLYN Y JOHN J. BYODERICK B ATTOPNEY.

Sgpt. 19, 1950 M. J. BERLYN ET AL Re. 23,268

FUEL SUPPLY APPARATUS FOR INTERNAL-COMBUSTION ENGINES Original Filed April 5, 1946 4 Sheets-Sheet 5 IN V EN TORS MARTIN J. BEE LYN JOH N J. DRODEEICK Sept. 19, 1950 M. J. BERLYN ETAL FUEL SUPPLY APPARATUS FOR INTERNAL-COMBUSTION ENGINES 4 Sheets-Sheet 4 Original Filed April 5, 1946 INVENTORS. MARTIN J. BEE LYN BY JOHN J. DRODERICK A TOENE Y.

Reissued Sept. 19, 1950 FUEL SUPPLY APPARATUS FOR INTERNAL- COMBUSTION ENGINES Martin J. Berlyn, Suffleld, Conn., and John J.

Broderick, Springfield, Masa, American Bosch Corporation,

assignors to pringfi Mass a corporation of New York Original No. 2,465,784, dated March 29, 1949, Se-

rial No. 659,708; April 5, 1946. Application for reissue June 9, 1950, Serial No. 167,166

24 Claims.

This invention relates to new and improved means for supplying fuel to the cylinders of an internal combustion engine and has particular reference to the provision of such apparatus which is relatively small, compact and economical in construction yet efllcient in operation.

The principal object of the invention is to provide fuel supplying apparatus for small, high speed Diesel engines, or the like, which apparatus is relatively small, compact and economical in cost yet satisfactory in operation and which will incorporate features which make possible the utilizing of less costly drive and mounting means.

Another object of the invention is to provide a relatively small, compact and economical fuel supply unit which contains the fuel supply pump, injection pump and governor in a single unit and wherein the injection pump head, supply pump or governor may be separately removed for service or replacement without removing the unit from the engine.

Another object of the invention is to provide a fuel injection pump which is designed to perate at crankshaft speed when used with four stroke cycle engines, instead of operating at onehalf crankshaft speed as is usual with prior constructions, and thereby allows the use of a pump driving pinion of one-half the usual pitch diameter and consequently reduces the size of said pinion to a point where it may be withdrawn through the pilot for the mounting flange for the pump to the engine drive gear housing and also allows the pump pinion to be mounted directly on the pump shaft and in many installations this amounts to the elimination of two bearings, a seal and a coupling.

Another object of the invention is to provide a fuel injecton pump which employs a pump drive pinion of relatively small diameter and thereforeallows a reduction in the size of the latterally protruding pump drive gear housing and allows the making of the whole engine narrower than previously possible and which feature is especially desirable for engines for agricultural tractors.

g Matter enclosed in heavy brackets II appears in the original patent but forms no part a! this reissue specification; matter printed in italics indicates the additions made by reissue Another object of the invention is to provide I a new and improved fuel injection. pump wherein the number of components requiring exceedingly fine workmanship such as lapped fits, accurately calibrated discharge check valves and ground metering edges have been reduced to a minimum. j I

Another object of 'the invention is to provide a fuel injection pump which avoids features una fuel injection pump which is designed to have natural inherent stable delivery characteristics, that is, the tendency to deliver a lower volume of fuel per stroke as the speed of operation increased.

Another object of the invention is to pmvide a fuel injection pump which assists the operation of the governor therefor instead of opposing the action of the governor as in usual constructions and thereby makes possible the obtaining of satisfactory results with a relatively simple and economical governor.

Another object of the invention is to provide :a device of the charactef described wherein it is practicable to mount' the governor directly on the 'pump drive shaft thus eliminating the necessity for speed increasing gearing which is both expensive and bulky.

Another object of the invention is to provide an arrangement of the type set forth wherein :it is possible to driveth'e fuel supply pump from the distributor gear of the fuel injection pump and earpump outlets to the spray nozzles. Inthis connection itis well known .that single plunger pumps using distributing means to direct successive pump discharges to various spray nozzles, not provided with discharge check valve means. are inherently instable and do not given tolerable degree of accuracy of distribution as between the various outlets and the introduction of delivery check valves in each of the outlets is one way of improving the accuracy of distribution, but the discharge check valves themselves have such a marked influence on the delivery characteristics that minute differences in the dimensions of the various check valves used in the delivery char acteristics of the various outlets and, therefore, an important object of the present invention is the pump can im-,

cases as the utilisation of a single discharge check valve serving all of the pump outlets and with said dis charge check valve located between the pumping element and the distributing element.

- a new and improved fuel injection pump which will not pump fuel if operated in a reverse direction, thereby overcoming a drawback and cause of difficulty with prior constructions Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings. It will be understood that many changes may be made in the details of construchon and arrangement of parts shown and described, as the preferred form has been shown ,Referring to the drawings:'

Fig. 1 is a top or plan view of a device embodyl'lg. 3 looking in the direction of the arrows;

Fig. 5is'a sectional viewtakenonline H of Fig.1lookinginthedirectionofthearrows;

Fig. 6 is a fragmentary sectional view taken on lineHofFig.1lookinginthedirectionofthe arrows; and

Pig. 7 is a fragmentary sectional view, on an scale, of the discharge valve.-

the purpose of illustrating the invention only, it has been shown applied to aunit adapted supply fuel toa four cylinder engine operating on a four stroke cycle, but it is capable of being other than four cylinders, for example, two or six cylinders.

Referring more particularly to the drawings,

prises the fuel supply pu'mp I, the' fuel injection pump 2 and the governor 3 secured together to form a single relatively small compact unit which maybemountedonorremovedfromanengine as a single lmit. f

Thefuelsupplypump i hasbeenshownbyway of illustration as a conventional gear type pump including the gears la and lb and the flow from the supply pump is controlled by the throttle leverlandthesegmentionthethrottleshaft 8. While, as stated above. a conventional gear type pumphasbeenshownbywayof illustration, itwillbeunderstoodthatother prior arttypesof fuel supply pumps capable of being mounted into a compact unit with the fuel injection pump 2 and the governor 3 may be employed, or, if desired. the fuel supply pump may be formed as a separate member having a fuel supply line connected to the fuel injection pump for supplying fuel thereto. The fuel supply pump l is adapted to receive fuel from the fuel supply tank through I a line, not shown, which connects the fuel supply tween the seat II and the tappet ill.

tank with fuel inlet 0: and fuel from the supply pump I through outlet .3 through a line, not shown, to the fuel inlet It for the fuel injectlon pump, through which it p to the fuel inlet supply chamber N.

The fuel injection pump 2 is composed of the pump head I, main pump housing 1b and gear housing la, which are secured in assembled relation by bolts or the like, or other suitable means. The pump is operated by the camshaft 8 which is provided with the two oppositely disposed cam lobes I which are rotatable upon rotation of the camshaft I and adapted to reciprocate the plunger II, the said plunger making two complete cycles for each rotation of the camshaft I.

The camshaft 8 is rotatably mounted adjacent its opposite ends on the ball bearing II and the bearing Ila in the main pump housing lb, and is provided with the hub drive I! adapted to be secured to the driving gear of the engine with which the device is employed by being bolted thereto by bolts extending through the openings II in said hub if. The mounting flange I4 is provided for securing the pump assembly in position on the engine.

On the camshaft I is provided the circular gear II which is rotated by said camshaft I and which meshes with the annular face gear it which has the hub lia which is rotatably mounted on the bearing II in thehoming It. The hub lia of the said face gear I. has an internal spline engaging an external spline on the tappet I! and causing rotation of the tappet ll upon rotation of the face gear I. and therebycausing rotation of the plunger ll.

Within the hub "a onthe face gear ii is positioned the tappet II which is in splined relation with the inner face of said gear and within which is positioned the upper spring seat 20 and the lower spring seat II which retains the end of the plunger II in engagement with the tappet I! through the action of the concentric coil plunger return springs 22 and 23 which have their opposite ends the spring seats 2i] and 2|.

The upper springseat II is merely a stop for the springs 22 and a while the lower sprin seat Ii engages both the tappet II and the end of the plunger II and retains the end of the plunger be- Sald lower spring seat 2| is preferably provided with a selfaligning coupling to eliminate the side thrust of a the plunger ll.

The pump head 1 contains the bore 24 in which the plunger I. is reciprocably and rotatably mounted. The reciprocation and rotation of the plunger Ill causes the plunger to pump. meter, distribute and time the fuel to the proper outlet. The plunger II is provided with the annular lubrication groove 25 adapted to receive lubricating oil through the oil supply opening I! when the groove 25 passes said opening it upon reciprocation of the plunger II and said plunger III is also provided with the annular fuel receiving groove 11 and the distributing groove 28 which is in communication therewith, and, therefore, is adapted to receive fuel from said annular fuel receiving groove 21. v

Fuel is adapted to be supplied to the bore 24 through the filling port fl in which is positioned the adjustable throttle or restriction member ll adapted to be adjusted to control the quantity of fuel supplied to the bore 24 as hereinafter de-- scribed.

In the pump head I at the upper end of the bore 24 is provided the discharge or check valve The'check valve arrangement 3|, as shown in Fig. 6, comprises the cylindrical member 33 positioned in the bore 24 and having the flanged head 34 seated on the pump head I surrounding said bore 24, and the delivery valve member 35 having opposed flattened surfaces 34 only one of which is shown, and having the enlarged head 31 which has a tapered seat 33 adapted to engage an annular tapered seat in the flanged head 34 of the cylindrical member 33 to normally prevent the flow of fuel through the discharge valve. It will be noted that the cylindrical member 33 might be omitted in which case the head 3| would seat directly on the pump head I. The flattened opposed surfaces 36 on the opposite sides of the member 35 are preferably so formed as to control the time of the beginning of flow of fuel through the discharge valve and also the rate of flow therethrough.

If desired, and for particular purposes, the surface of the member 35 may be formed of other suitable contours than the flattened surfaces 36 described, for example, such a surface might be formed with longitudinal flutes, straight or tapered.

Above the cylindrical member 33 is positioned a speed-delivery adjusting member 33 which is threaded into the pump housing in alignment with the bore 24 and delivery valve member 35 for vertical adjustment for controlling the quantity of fuel to be delivered. The speed-delivery,

adjusting member 39 has a central bore 40 in aligned relation with the enlarged head 31 on the member 35 and within said central bore 40 is positioned a coil spring 4! adapted to rest at one end against the inner edge of the bore 40 in the member 39 and to have its opposite end engaging said enlarged head 31. This spring 4i is provided for effecting return of the head 31 of the valve member against its seat when the fluid flow pressure drops and also returns the member 34 against its seat on the head 1. Over the adjusting member 39 is provided the threaded plug 42 for closing the opening in the housing and which may be removed for adjusting the member 39. The lower end of the adjusting member 33 is provided with slots or openings 43 to allow fuel to pass into the supply groove 32 and from said supply groove the fuel passes through the port 32a ,connecting the fuel supply to the annular fuel receiving groove 21 in the plunger III as previously described.

It is pointed out that with the form of delivery valve employed, as described above, that as the speed at which the pump operates increases, the time for flow through the delivery valve decreases, and also that it is the tendency of the valve member 31 to be raised higher, that is, the valve opens wider with higher operating speeds.

A very desirable feature of the present construction is its tendency to reduce delivery per stroke at high speeds, that is, it provides a natural decline in quantity of fuel delivered per stroke as the speed of operation of the engine per stroke increases, and since the engine gets a smaller charge of air per stroke at higher engine speeds,

8 the pump tends to maintain the ratio over the engine speed range.

In the pump housing I and surrounding the bore 24 and connected thereto are a series of out-' let ports 44, each of which is in communication with a separate distributing outlet 44a, each of which is connected by a pipe line, not shown, to

correct air fuel a different cylinder of the engine to which fuel is to be supplied. I

The outlet ports 44 are preferably in the same longitudinal plane, although this is not necessary, but radially spaced around the bore 24 so that the distributing groove 23 on the plunger III will communicate with one of said outlet ports during each stroke of the plunger and due to the rotation of the plunger ll, said groove 28 will communicate with each of said ports 44 successively during successive strokes of the plunger III.

The throttle or restriction member 33 in the ill] port or 'fuel inlet 23 extends through the diaphragm member 53 which allows motion of the throttle member 33 and also provides a seal for the fuel inlet supply 59. The throttle member 33 extends through an opening in the diaphragm 53 and is locked in position therewith by the locking nut 60 or other suitable means.

The balancing or neutralizing spring ii is provided to partially balance or offset the effect of the supply fuel pressure in the inlet supply 53 against the diaphragm member 53.

Outlet 64a is the outlet for the overflow return 64b to the fuel supply tank and is adapted to be connected to the tank by a supply line.

The relief valve 65, which is connected to said return 64b between the outlet 64a and the chamber 59, is provided for controlling the fuel supply pressure.

The setting of the throttle or restriction member 30 is automatically accomplished by the governor 3 as hereinafter described.

The governor 3 is secured to the fuel injection pump housing by means of the bolts 45 or other suitable means and the governor shaft 46 is keyed the governor shaft and governor is driven simultaneously with and at the same speed as the camshaft 8. On the governor shaft 45 and rotatable therewith is the support 48 on which are mounted the pivotally mounted centrifugal governor weights 41, each of which has a finger 43 adapted to engage the adjustable collar 50 which is slidably mounted on the governor shaft 46, and said collar 50, in turn, abuts the forked end 5| on the pivoted lever 52 which has its opposite end operatively. connected by a resilient connection to the adjacent end of another pivoted lever 53 which has its opposite end connected tothe throttle member 30 for controlling the supply of fuel to the bore 24.

A manually operated lever 4, exterior of the pump housing, is connected to shaft 8 which is connected to the opposite ends of the coil spring 55 which is also connected adjacent its center to the forked end 5| of lever 52 for controlling the amount of pressure upon the pivoted lever, 52 and tension of the spring 55 and the shut off lever 54 on shaft 54a operates the lug 56 on shaft 54a which is adapted to engage pin 56a on forked end 5| for pivoting of the forked end 5| of the pivoted lever 52 for closing the supplyof fuel to the bore 24. I

With the construction described above, rotation of the governor shaft 46 will cause pivotal movement of the centrifugal weights 4'! which will impart axial movement of the collar member 53 1 7 g 8 against the forked end ll of the pivoted lever fuel'to the various outlets 44 as described above. I! and thereby cause adjustment of pivoted lever With this type of construction the pump could I! which will adjust the setting of the throttle be adapted for manifold-type gasoline injection member SI and thereby automatically control the in e h y r q es 1 W Peak inlection pres-. amount of fuel supplied tothe bore 24 of the sures having a value of approximately one-tenth pump. By control of the tension on the spring Ofthflt mployed in Diesel engines of the general I, the settin of the governor may be effected. ype to which the fuel injection pump of this ap- The low idle adjustment, that is, the control of plication is directed. Because of the low injection the throttle member 80 at low speeds is effected pressures. such construction would not be subject through the leaf spring 88 which bears against 10 to the difllculties previously set forth with inthe lower end of the pivoted lever 53. The adlection pumps wherein the pumping plunger. has justing screwv ll, which may be reached for adan axial bore which is subject to high pressure. 1 justment by removal of the threaded plug a, om th r going, it will be seen that we have adjusts the tension of said leaf spring I on said provided simple, em'cient and economical means lever 53 and thereby controls the position of the 1 for Obtaining all of the objects and advantages of throttle 3. in conjunction with the governor I. h invention. a

0n the pump housing is provided the pointer Having described our invention, we claim: II by means of which the pump is timed in the 1. In a fuel injection pump, a combined pumpu i manner; After th mp is as embled, ing and distributing element to supply fuel to each the huh I: is rotated until the plunger II is in of a plurality of engine cylinders, means for reposition to close the inlet port and the distributciprocating said element to pump f l and r a ing groove is aligned with number one outlet, and ing said element to distribute such fuel, and a the hub is then marked in line with the pointer discharge check valve positioned in the fuel path 51; This allows the mounting of thepump on between the pumping and distributing portions of the engine with the pump in proper phased resaid element. lation with the crankshaft. 2. In a fuel injection pump, a single combined In the operation of the device the fuel supply 'llumplng be and distri member p pump receives fuel through the inlet II and suped o s pl ,fuel to a plurality of en i e cyl plies fuel to the fuel injection pump I through ders successively, means for reciprocating said the inlet 64 and inlet supply It to the ailing port so element to pump fuel a d r a a d element 2! and then tothe bore 24. to distribute such' fuel, and a discharge check On the descending stroke of the plunger la, valve positioned in the path of fuel flow between the delivery valve closes and the plunger creates the p g d d s ribu po tio s of s d a partial vacuum and uncovers the inlet or filling memberport 1! which tends to fill the bore 2| due to th 3. In a fuel injection pump, a bore, a combined pressure drop created inthe bore and the pressure P pin and i i g member i said bore, a

supply of fuel. plurality of outlets connected to said bore for The amount of fuel'supplied to the bore 24 is supplying fuel to the various cylinders of an incontrolled by means of the throttle member at ternai combustion en ine su ssiv a fu l which, in turn, is controlled by the governor 3 as 40 path externally of said bore and connecting the previously described. On its pump g stroke, the Dumping and distributing portions of said memplunger ll closes the inlet port 2| and forces-the her, and a single discharge check valve between fuel in the bore 24 through the discharge valve t pumpin p n of said m m r and said member ll. opening 32 and port 32a to the annuoutlets and adapted to'serve said plurality of outlar fuel receiving groove 21 in the plunger from lets. 1 which the fuel flows to the distributing groove II 4. In a fuel injection pump having a bore, a which is aligned on successive pumping strokes pumping member in said bore and a plurality of. with each of the ports 44 and supplies fuel to outlets connected to said bore and adapted to each of said ports 44 and discharge outlets a connect said pumping member, with the various to the engine cylinders successively upon aligncylinders of an internal combustion engine to ment of said distributing groove with each of supply fuel thereto, a single metering device and said outlets successively upon successive strokes a single distributing means on said pumping of said plunger I0. member adapted to provide precise equal distri- With the delivery valve as d c ib b v h vbution of fuel to each of said outlets successively ing the flattened surfaces on opposite id of and a fuel passageway externally of said bore for the stem, the valve controls both the time of the d liverin f l from h p r ion f i bore in start of flow and the rate of flow, As pointed t which it is pumped to said distributing means. above, as the speed of the pump increases, the In a fu l injection pump h vin a boretime allowed for flow by the delivery valve shortpumping member in said bore and a plurality of ens and as it is the tendency of the valve to open outlets connected to said bore and adapted to be higher or wider with higher pump speeds, connected with the various cylinders of an in- It will be seen that because the same delivery ternal combustion engine to supply fuel thereto, valve, distributing groove and metering means are a single metering device and a single distributing employed in all cases that the amount of fuel means on said pumping member adapted to prosupplied to each of the outlets is precisely the vide precise equal distribution of fuel to each of same, thus overcoming one of the most serious said outlets successively and a single discharge dimculties present in prior art constructions as delivery valve, said valve being positioned in the Po e out a path of fuel flow between the pumping and dis- It is also pointed ,out that instead of the artributlng portions of said pumping member. rangement shown with the external bore 32s., the 6. In a fuel injection pump, a bore, a single device could be constructed by forming a hollow combined pumping and distributing element in plunger having a single discharge delivery valve said bore, a plurality of outlets connected to said and with the plunger having a port adapted to bore adjacent said pumping element for supplyconnect the discharge delivery valve and the fuel ing fuel to the various cylinders of an internal distributing means which would distribute the combustion enginaasingle distributing meanson said pumping element adapted to register with;

said outlets successively to deliver precisely equal fuel charges to each outlet successively, and means externally of the bore for connectingsaid distributing means to the supply of fuel pumped by said pumping element.

7. In a fuel injection pump, a bore, a single pumping and distributing element in said bore. means for reciprocating said element to pump fuel and rotating said element to distribute such fuel, a plurality of outlets connected to said bore adjacent said pumping element, each of said outlets'being adapted to be connected to a cylinder of an internal combustion engine whereby fuel may be supplied to said cylinders successively, a single distributing means on said pumping element adapted to register with each of said outlets successively and a single discharge valve in the path of fuel flow between the supply of fuel pumped by said pumping element and said distributing means.

8. In a fuel injection pump for internal combustion engines, a camshaft adapted to be rotated at engine crankshaft speed, a bore, a solid plunger in said bore and adapted to be reciprocated by said camshaft, said plunger having pumping and distributing portions, cam means on said camshaft for effecting a plurality of strokes of said plunger for each rotation of said camshaft, and a single discharge check valve positioned in the path of fuel flow between the pumping and distributing portions of said plunger.

9. In a fuel injection pump, a camshaft adapted to be rotated at crankshaft speed, a bore, a single plunger in said bore and adapted to be reciprocated by said camshaft, said' plunger having integral pumping and distributing portions, cam means on said camshaft for effecting a plurality of strokes of said plunger for each rotation of said camshaft, a distributing member integral with said plunger and adapted to supply fuel to a plurality of engine cylinders, a single metering device adapted to provide equal charges of fuel to each of the engine cylinders and a single discharge check valve positioned in the path of fuel flow between said pumping and said distributing portions of said plunger.

10. In a fuel injection pump, a bore, a solid pumping and distributing member in said bore, a plurality of outlets therefrom, means for supplying fuel to said pumping member, distributor means integral with said pumping member for distributing fuel to said outlets and port means exterior of said bore for allowing the passage of fuel pumped by said pumping member to said distributor means.

11. A fuel injection apparatus wherein a single pumping member is adapted to supply fuel to a plurality of combustion chambers successively comprising a bore, a pumping and distributing member in said bore, a plurality of outlets connected to said bore, fuel distributing means integral with said pumping member, a discharge delivery valve communicating with said bore, a port external of said bore-and connecting said discharge delivery valve and said fuel distributing means, a camshaft and means on said camshaft for simultaneously causing reciprocation and rotation of said pumping member to thereby effect pumping and distribution of fuel.

12. A fuel injection apparatus wherein a single pumping member is adapted to supply fuel to a plurality of combustion chambers successively comprising, a bore, a pumping and distributing member insaid bore, a plurality of outlets connected to said bore, fuel distributing means integral with said pumping member, a discharge delivery valve communicating with said bore, a port external of said bore and adapted to connect said discharge delivery valve and said fuel distributing means, a camshaft, means on said camshaft for simultaneously causing reciprocation and rotation of said pumping member to thereby eifect pumping and distribution of fuel, and a single fuel supply means for supplying fuel to said bore.

13. A fuel injection apparatus wherein a single pumping member is adapted to supply fuel to a plurality of combustion chambers successively comprising, a bore, a pumping and distributing member in said bore, a plurality of outlets connected to said bore, fuel distributing means integral with said pumping member, a discharge de-' livery valve communicating with said bore, a port external of said bore and adapted to connect said discharge delivery valve and said fuel distributing means, a camshaft, means on said camshaft for simultaneously causing reciprocation and rotation of said pumping member to thereby eflect pumping and distribution of fuel, a single fuel supply means for supplying fuel to said bore and an adjustable throttle associated with said fuel supply means.

14. A fuel injection apparatus wherein a single a pumping member is adapted to supply fuel to a plurality of combustion chambers successively comprising, a bore, a pumping and distributing member in said bore, a plurality of outlets congral with said pumping member, a discharge delivery valve communicating with said bore, a port external of said bore and connecting said discharge delivery valve and said fuel distributing means. a camshaft, means on said camshaft for simultaneousl causing reciprocation and rotation of said pumping member to thereby effect pumping and distribution of fuel, a single fuel supply means for supplying fuel to said bore, an justable throttle associated with said fuel supply means and a governor for automatically controlling said throttle.

15. In a fuel injection pump, a housing, a, bore in said housing, a solid plunger in said bore and adapted for reciprocation and rotation therein and serving both as pumping element and dis-. tributing element, a fuel passageway from the portion of said bore in which fuel is pumped under pressure to the portion thereof in which fuel 5 is distributed and a check valve in the fuel path between said pumping and distributing portions. 16. In a fuel injection pump, a housing, a bore in said housing, a solid plunger in said bore and adapted for reciprocation and rotation therein 5 and serving as pumping element and having means on its outer surface for serving as distrib- 1 uting element, a fuel passageway from the portion of said bore in which fuel is pumped under pressure to the portion thereof in which fuelis g5 distributed and a check valve in the fuel path between said pumping and distributing portions. 17. In a fuel injection pump, a housing, a single solid pumping and distributing member in said housing, a fuel passageway for directing fuel from 7 the pumping portion of said member to the distributing portion thereof and a discharge check valve in the fuel path between said pumping and distributing portions;

18. In a fuel injection pump. a housing, a bore II in said housing, a fuel supply port communicating nected to said bore, fuel distributing meansrinteber from the pumping to the distributing portions thereof and a discharge check valve positioned in the fuel path between said pumping and distributing portions.

19. In a fuel injection pump, a housing. a single, solid pumping and distributing member in said housing. a fuel passageway externally of said bore for directing fuel from the pumping portion of said member to the distributing portion thereof and a plurality of outlets adapted to communicate with said distributing portion.

20. In a fuel injection pump, a bore, means for supplying fuel to said bore, spaced outlets adapted to direct fuel from said bore to a plurality of combustion chambers, a combined pumping and distributing element in said bore, said element having a pumping portion and a distributing portion, means for directing f-uel pumped by said pumping portion to said distributing portion, a

discharge check valve in said means for directing fuel, said distributing portion including distributing means adapted to register with each of said outlets successively and means for supplying fuel to said distributing means.

21. In a device of the character described, a housing, a bore in said housing, a plunger in said bore, said plunger having pumping and distributing portions, a plurality of outlets communicating with said bore, a fuel passageway ex-t ternally of said bore for directing fuel from the register with each of said outlets successively to direct fuel to said outlets in desired sequence and means communicating with said distributing means and adapted to register with said fuel passageway for supplying fuel from said passageway to said distributing means.

28. In a device of the character described, a housing. a bore in said housing, a plunger in said bore, said plungerhaving pumping and distributing portions, a plurality ofv outlets communicating with said bore, a fuel passageway for directing fuel from the pumping portion of said plunger to the distributing portion thereof, said distributing portion including distributing means adapted to register with each of said outlets successively to direct fuel to said outlets in desired sequence and means communicating with said distributing means and adapted to register with said fuel passageway for supplying fuel from said passageway to said distributing means, and a dispumping portion of said plunger to the distributing portion thereof, said distributing portion including distributing means adapted to register with each of said outlets successively to direct fuel to said outlets in desired sequence and means communicating with said-distributing means and adapted to register with said fuel passageway for supplying fuel-from said passageway to said distributing means, and a discharge check valve in the fuel path between the pumping and distributpumping portion of said plunger to the dis- 40 P r B d plun ertributing portion thereof, said distributing por-,,

tion including distributing means adapted to register with each of said outlets successively to direct fuel to said outlets in desired sequence and means communicating with said distributing means and with said fuel passageway and adapted to register with said fuel passageway for supplying fuel from said passageway to said distributing means.

22. In a device of the character described, a housing, a bore in said housin a plunger in said bore, said plunger having pumping and distributing portions, a plurality of outlets communicating with said bore, a fuel passageway externally of said bore for directing fuelfrom the pumping portion of said plunger to the dis- .tributing portion thereof, said distributing portion including distributing means adapted to mam J. BERLYN. JOHN J. naonnmcx.

REFERENCES crrEn The following references are of record in the file of this patent or original patent: I UNITED STATES PATENTS Number Pool Jan. a, 1946

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