US1708306A

US1708306A - Fuel-feeding system

Info

Publication number: US1708306A
Authority: US
Publication date: 1929-04-09
Anticipated expiration: 1946-04-09

Description

April 9; 1929. n J. v` GIESLER 1,708,399

FVUEL FEEDING SYSTEM Filed July le. 1920 y 4 Sne'etsheet l April 9, 1929.

Filed July 16. 192C J. V. GIESLER FUEL FEEDING SYSTEM 4 Sheets-Sheet 2 Z1 l l l Z4 15 VT4 56 '70 I4- 73 9 8 7 .z5 l5.5

Si (ulg/L @I1/Wenko:

April 9, 1929, J v GIESLER 1,798,306

FUEL FEEDING SYSTEM Filed July 16, 1920 4 sheets-sneer 5 IL! yl .IIS

April 9, 1929. J. V. GIESLER 1,708,306

' FUEL FEEDING SYSTEM Filed July 1e. 192C 4 sheets-Sheet 4 GRM/"uta Patented Apr. 9, 1929.

UNITED STATES JEAN V. GIESLER, OF KNOXVILLE, TENNESSEE, ASSIGNOR, BY MESNE ASSIGNMENTS,

PATENT OFFICE.

TO THE FULTON SYLPHON COMPANY, OF KNOXVILLE, TENNESSEE, A CORPORATION 0F DELAWARE.

FUEL-FEEDING SYSTEM.

Application filed July 16,

This invention relates to fuel-feeding sy"- tems for engines and, more particularly, to means for pumping the fuel from the source of fuel to the fuel-consuming elements of the engine. It is also an object of this invention to provide an improved pump which, while capable of a wide variety of uses, has special utility when applied to the pumping of fuel to an engine.

It is an object of this invent-ion to provide an improved fuel-feeding system for engines comprising a pump the stroke of which varies automatically with the fuel consumption so as to maintain a predetermined pressure on the fuel supply to said engine.

A further object of this invention is to provide an improved fuel-feeding system for engines which comprises a pump that is so constructed as to automatically absorb the 2") shock arising from the inertia of the fuel.

A further object of this .invention is to provide -a fuel-feeding system including an improved pump which has a flexible pumping member and actuating means therefor which is so related to said flexible pumping member that the stroke of the latter automatically varies with the pressure developed thereby so that the quantity of fuel supplied by said pump automatically conforms with the rate of consumption of fuel by the engine.

A furthir object of this invention is to provide a fuel-feeding system including an impri'ived pump having a flexible pumping member and actuating means therefor which is so related to said member that said member may move with respect to said actuating means in response to an increase of pressure so as to absorb the shock arising from the inertia of the fuel.

Another object of this invention is to provide an improved pump having a stroke which varies antoniatically with the pres- ,l sure developed thereby; also an improved i pump the pumping member of whiclrmay move with respect to its actuating means in response to an increase of pressure in the pump.

Yet another object of the present invention is to provide a fuel-feeding system of the type heretofore characterized with means whereby the supply of fuel to the fuel-consuming elements is made substantially continuous. y Another object is to pro- 1920. Serial No. 396,783.

vide a fuel-feeding system of the type here tofore characterized wherein the inlet and outlet valves are so arranged with respect to the pump 'that the fuel cannot flow out of. the pump when the latter is not in operation.

Other objects relate to the provision of a fuel-feeding system which is composed of a relatively few parts which may be inexpcnsively manufactured and easily installed; which is relatively compact and can be positioned at any convenient location with respect to the engine; which will supply fuel to the engine soon as and long as the engine is in operation; and which is highly efiicient in operation.

In the preferred embodiment of the invention thepumping member is a flexible member in the form of an cxpansible and collapsible wall, and said actuating means is so related to said flexible member as to positively actua-te the same during the suction stroke, said member making its pressure stroke by the force of resiliency which may be inherent in said flexible member or provided by resilient means acting on said member or both. Said flexible member, although positively actuated during the suction stroke, is preferably so related to the actuating means that it may move with respect thereto in response to an increase of pressure arising from the inertia of the fuel. The invention also comprises the improved pump used in other relations than in a fuel feeding system.

The invention is capable of receiving a variety of mechanical expressions some of which are shown on the accompanying` drawings, but it is to be expressly understood that the drawings are for the purpose of illustration only and are not to be construed as a definition of the limits of the invention. reference being had to the apn pended claims for that purpose.

Referring in detail to said drawings, wherein the same characters designate corresponding parts iii the several figures :n

Fig. l is a schematic elevation of a fuelfeeding system for an internal combustion engine embodying the present invent-ion;

F ig. 2 is an axial section of a pump embodying the present invention;

Fig. 3 is an axial section of another pump embodying the present invention; and

Fig'. 4 is en axial seetion of a pump embodying; the present invention und provided wilh ineens for effecting e continuous discharge to the fuel-consuming elements,

In the form. showmilre invention, is` up plied to e fuel-feeding system for un internal' combustion engine of the type commonly employed in automobiles wherein the engine 1 provided with Jdie usuel intake munifold 2 :uid e eurbureter 3 oiienysuibzrhle oonsrrueion. it is to be expressly understood, however, that 4he invention is not limited tio the suliplyiugir ofli fuel lo u. carburetor, es any other suitable :fuel-consuming device or elements, es fue-l burners, may be employed in eoinjuneliion with the pr sen;` invention.. A source of 'fuel ie diugrununeiically illusr unillzed uit f1', the same communicating "u ough pipe 5; with. fr pump, generally designated (5i/Y the llutlier inturn. cominummering willi the (,tmrbiu'eter 3 through. pipe Z1 Imi accordance with the present invention the mmap 6 has as. its pumping member ai liexljble wall so related lo, actuating; ineehenieni 'that Jdie amount oli flexure osaid well` and ite position with, respect to said actuating mechanism varies mitonmiiieelly with the preseur in he pump. in the iiorm slhowii on, the drawings. on expansiblse and collups'ble tugbulur wall' 8, preferably oi'f corrugated resilient material?, such. als metal, is suitably mounfaed' u" ein epiunp chembeif 9 provided; within e, easing 10i of any suiieble consi;rueifioir.A Brezed or otherwise Suite-bly attached to one end of the tubular erpensible :md collapsible wall 8D is zi rigid movable end well 11, while the opposite end! of said; well; 8 is held lixedly in posit-ion, as by brezedf orotherwise suieubly attached to :i rigidy :mnulus 12, vwhich only be clamped iii position between the pump e sini@ 10J und the geur housing; 13 herein- :ifffxer referred io.

Gperulivel-y connected iio said movable end wall 11 is actuating i-iieuuys oli' suit' ble roizsii'ufi'iou l'or reciprocating seid movable end wall. Suid zwiluzilin-g means prefeiubly :5o imisl'i'uciml ur: lo posiiively move Suid inefable oud well in eue direi/hon buil to permit iuoveuwut of seid well with respect lo Huid :l-fiuuliug; menus should the presuue ou lhe fluid side ofl ,said well eX- ieed the operating'v pressure of ihe eeiuziling miens, In` ibo 'lfoi'm :4l-)own iu Figi'. ai U-rlhuiwd yoke 1J: provideffl wiil, :i spindle 15 extending from one of the leggi; of said Uli und seid spindle is opernivelyconnected lo said movable end wall 11 es by the threaded connection indicated et 16. To reciprocate seid yoke e eem 17, shown as :un eccenirie, isL mounted between the legs of the Ul in position to engage one of said legs and displace the yoke in one direction es said eumor eeeentrie 17 rotates, the legs 'of Said yoke 14 being, Preferably so spaced That lhe cuni or eccentric 17 does not e11- guapge he opposite leg thereozli. In the prelierred embodiment oi? the invention seid com or eeeentrio is so related jeo said yoke es. io, engage the leg 18 to: lle): the wall. 8 in such e. direction. as provides e, suction sirolle, i'. e. to collapse seid wall 8 in the :u'ifeugren'ieut shown on the drawings; leg;` 19 oi seid yoke, however, is so spaced :from leg 1.8 Lhereoi that when the 17 is rotated through 1800 from the position shown in Fig. 2' ifs does noi1 eoniues and f-lfiereore does not positively operaie lil-ie Seid legV 19 to provide 'the preesuif'e stroke of" ihe flexible wzl-ll.

The pi'esf-1iiie sirol'e of the if# Zible well- 8 is preferably elleciled by the force oi'i resiliency. This resilier-icy nie-y be inherent in the welll itself es when seid Well is oonsiii-rueied of res #t muterizil, or il; mary be supplied by ref lient means eoing on ihe movable end well' 11, or the combined resilieney 01": the 'iexible .velli endv oii a. spring on the' movable end Wall: 11 may be emp eyed. In 'lne Yliorin shown n, Coil Spring 2O of suitable strengbli to properly supe pleurene the resil'ieneyl of the expensible sind eoliljepsible wellv S: is mounted v'ihin seid will in operui e engr reineneli i opposite @nos wi'h the movulfile end wzill 11 and n, ixed abutment well 21. Seid movable end willi' 11 and Jche abutment well 21 may bel desirebly so eonsrueted is to center seid springe; es; Shown. Seid abutment welll 21 may also be provided iviih e proieeeion or boss projecing within the iubuler well 8. to such i position that it mry contado vvi'ah the momble end well 11 a, projeeion thereon and JLluis prevent 'l'lexure or collapse of Suid well S. il` 1d projection or boss muy also be ,vided with :in annuler plug or Coller 22 o guide the reeiproeuiing inovomer' spindle 14"). rovuledl for J. l, s oi ho i Airy suiuole meri-iis may be i io'rzi i'ho ein or ereeniifie 1i. in, lrho :Form shown. in Fig. 0 su'd Cum or eeeiiirie is nnuiuird on u if vvhuh Curries :i pini( iriin iur-sh wih u pinion S6 on 29u/ vul-rich in turn, Curries e rhuiu geur 2S driven by u chum Q9 'from u @bein grem- 30 ou u, shzlii 31, 'if-'he lzri'ier i f prix, im, Yfb Y i' i i Y su hier. einen .mobi liu, (Muu-x :luiluoi beu :mme oher roliuiiug engine-driven The mim or eccentric 17 :md d if und 2G re prelierzihly ruounied wihiu e geur housing 123 oi :my rsuiluble eonsrriuz'' ou, iyhe seme bein/sfsliown as cramped to he pump oasiiw C by bolts or sermvs 32. Seid geni' lmusinte` 13 may be mede oil-tight and wholly or purly lilled with e lubricant to effect rhe proper lubri, Cei-ion of ihe actuating mechanism enclosed within seid ezisie. 1i? desire l.f the yoke 1li may be prev lied from roei'ing a geueruily U-sheped projeeiion provided in 'um or eeeenrrio lll) lll)

the interior oit the gear housing 13. In the form shown in Fig. 2, a bolt has provided on its head a pair of spaced lugs Se between which the yoke 14 reciprocates, said bolt 33 being retained in operative position by a nut 85 threaded on its projecting exterior' end.

To supply means for manually flexing the wall 8 so as to enable tbe pump to be primed when tbe system is tirst put into operation, the yoke lll is preferably inrovided with a spindle 36 projecting to the exterior of the teje-ar housing' 13 Wliere it may be conveniently operated by hand. ln the form sin vn in Fig'. 2, said spindle SG is sliovfn in alinement with the spindle l and is provided eitoriorly of the housing lll vwith a suitable llznob or handg'rasp 3T. `Plaid manual means for 'flexing' the pumping; inenilier 8 may be extended to any convenient location, to tbe dash` but as said manna. means will normally be operated only when the fuel-feeding system is first installed, the spindle 36 with its hand-grasp 3T need ,only project Within the engine hood.

Said pump is also provided with suitable inlet and outlet valve mechanism. ln the form shown in Fig. 2 the pump easing;v l0 is provided at the upper portion thereof with a threaded nipple 38 which receives a valve housing provided at its opposite ends vitli passages l() and 4l for connection with the pipes 5 and l respectively. Passage 40 terminates in a valve seat 42 controlled by a valve member 43, and a 44 extending from the

inlet valve

42, 48 `communicates with the nipple 33 intermediate its length and terminates at its opposite end in a valve seatl') controlled by a valve member 4G. The passage all communicates with the opposite side o't said ontlet valve 45, 41:6. rthe valve n'iembers -ll and lo may be ot any suitable construction, beinc` shown as of the disk type, and may be guided in their movements in :inv suitable ivay, the respective bonnets ll-"i' and il?) bong shown as provided with recesses lli-fl to Lguide tlie movement ot tbe valve spindles inlaid valve dislfs are shown as moved into closed position by `rravity and the u erating` pressures, but may be spring;` actuated it desired.'

The valve mechanism heretoibre described is preferably located above the pump casing' l0 so that when the pump is not in operation there will be no tendency tor tbe liquid within said casing l0 to tloiv out oi' the same even though the valves may be leaky. The passages through tlie valve housing 39 are preferably so arranged that the inerte ot the oil flowing into the same will to carry the oil through tbe outlet valve and into the pipe communieating` vvitli the passage ll. The passages through the valve housing 39 are also preferably so constructed as to alloro substantially no air pockets in order to iacilitate tbe evacuation oi' air out owing to me relative anew said valves, this type ot construction does ig' the e' when not possess tbe advantage of proven ovttloiv oit fluid trom the pump casi-in t-lie pump is not in operation, should tlie valve leal?. By arrangringjr said inlet and outlet valves diametrieally opposite, boivever, this construction possesses the advantao l, lierci before s'e'terred to in connection vvitu the embodiment oli Fie'. f2, that the inertia ot the fluid ow'rig into the pump j t nds' to carry it tluougrh the outlet rlbe pumping member of the embodiinent oi; ltie'. l is ot sulistaiiciallj the same construction as that heretofore described in conjunction with tbe embodiment ot lf Q, but the abutment wall il for the spring* Q() is not extended to 1provide a stop for the movable end ivall ll. The actuating mechanism for tlie pumping` member shown in VEig. S is of' somewhat (litter-ent construction .trom that shown in tbe vol-:e being` o't generally rectangular construction and being prov `red with an extension 56, shown as in alinement with the spindle l5, received within a. recess 57 provided in an enlargement oit tbe cover oit tbe (rear housing' lf3. Said projection fill, reciprocating' in the recess 57, co-acts with tb spindle l5, reciprocating in an. aperture in tbe abutment Wall Si, to guide the reciprocatimi ot tlie yolre.. The eiilargreinent on the cover 5S may be provided with spaced projections to also preventJ said yolre from rotating'. this embodiment. tbe shui 2l ot tbe cam or eccentric li' carri-es an'orin whee 59 with whit-li meshes a norm C() on a sluiit. (il

proiectimr to the ezd'ei'ior ot the housing; i where is slioivn as carrying' a chain iii) vbe subszrutiully continuo puuu) to the il'uel-eopuimi up; elements shrill p and not intermitbent with the pressure strokes of Jthe `ipiueinemlur7 s ceiver preferublj interiV in the system between the pump and the fuel consuming' elements. This receiver muy be of :my suitul'ile eoustfiguction un oir receiver or :L reeeiver employing` u loaded ifopliregu1. lu, the embodiment illustrated in Fig. -if :i receiver casing (if is shown es provid d with opposed nipples G53 und for conn ion with the 'vulve heusing: 52) und. the pip-e 7 respectively. Mounted within the sind rr, ,eiyer easing en espoir sible und collapsible Wall- T,O,prei`;erubly of (':orrugguted resilient material such :is met-el, one end ot seid Woll being; held fixedly in position by being: bref/ed or otherwisesuitzrbly u ,ached to o riggio onuulus 7l secured to or formed :is o part olf the receiver ces ing' G7, und the opina it euri ot z ,ld weil i0 being;` brozed or otherwise suitably ritter `red to zr rigid movable end` woll 72. The re silieney of said woll 70 mary be relied upon to nuriutein on outflow pressure on the fluid in. the system, or the resiliency oi seid d muy be substituted by or supplemeiued by o coil spring 73 engaging; the movable. end Well 72 :it one end :rnd in eux@ rgemen; with an abutment disk Tl et its other To provide for the adjust-1 1' ent oit the pressure of the receiver diaphragm on the riuid lorvi through seid reeeiier seid abutment disk a-l muy be operatively engaged by n threueec bolt 75 which projects to the exterior the cover 7G of the receiver easing 67, Where it muy be rotated to increase or decreese the tension of the spring 73,.

perzitien: Assume that the fuel-feeding system has been pro perly installed, thev pump beine' loezfrted et :my convenient position Within the engine hood :rnd connected by pipe 5 with ihe 'fuel tuuh Ll, :it :my desired locution, and by the pipe i wird the cirrbureer 3. rlhe zni'tuiitiniij inecl-:uiism of the pump may be connected with any suite-bie driven port of the engine ''lirough georim; oi zmy suitable construction g it the crunk shaft employed' :is the pui Ap-riving clement, 'its speed oiE rotation will ordinarily be in excess oi ibut required for the proper operation of the pump und. there/i' re, the ueluiuing meeh- :iuism ilior the pump should iufeiierubly include reducing peering, oi which the chain geurmg; illustrated muy be teken us typicul.

system is iirst ins und the wmmunicu priinipg tibo pump. Vhiile seid immuni, prin'iing means muy extend to the dash or other suitable locution, if the type. of COD- structien shown Fig. 2; is enrplpyed so t .et @iter the pump Casing isprimel it con: not become emptied While the, engine s standing idle, the manuel priming. ULG/Chojnism ispreiferzrbly inode accessible under the engine hood; it need; be operated; but once. By graspingrY the member. S, in the embodiment ofi Fifi. 2, und flexing the Woll 8 u few times7 the :rir may be evacuated from the system and the pump cursing' endl; communicating pipes und pussiges filled with. the fuel.

Thereafter, Whenever the engine is turning;` over7 the com or eccentric 17 is rotfrted end :it euch ro` rigrl hond les` o., yoke ll or to more Jhe sume toward. the right es viewed on the drawings. T he reeiproeeition oi the yoke tourrrd the right cruises the movuble end Well ll to also move toi the right, flexing.. or collapsing; the expunsible und collapsible Woll 8 :15nd providing fr suctiony stroke. The suetion in the pump 1 0 eexuses the valve #i3 to open und Atiuid to. flow into seid costrom the pipe lflrsthe com oreccentrio i es past tl e pos'i'ion shown on the drevings thev movable, end Well' ll mores toward the left is viewed on the drawings by the force of resiliency inherent in the expunsible and collapsible Weill 8 or the spring- 20 or both to provide o pressure streifte, the yole i8 following* the ieee of the cam or. ececntric es it i'otutes'but not being positively :rctuoted thereby. The pressure thus developed in the pump casing opens the, oui]- let valve 4G und the fuel is forced through the pipe 7 'lo the carburetor.

llfhen the flexible pumping' member makes this suction stroke and the vulve l5 is opened, u relatively large muss of iuel ending buck through 'the pipe 5 toy the trink 4l is set in motion,V and this relatively large mess of fuel possesses considerable inertie. lli the iretuzrting. meehonismy were positively connected to the movable end well ll so thotj suid Woll were brought tol un abrupt stop at ihe end of the stroke, the inertie olI the iniioujing fuel would build up ir relatively hi gh instantsueous pressure within the pump casing und this reluively high pressure et euch operation olI the pumpiire` member would tend to overstress the flexible iyull 8 :1nd cause its early exlurusion and rupfvure. By having the actuating mechanism so related to the moruble end Wall 1l that the lutter muy more with respect thereto7 however, the building; up of high instuntsneous pressures Within the pump easingA is pre- Ven'letb es the tenden :},f oi the inertie oji'f the oil to build up e pressure Within the pump casing et the end of the suction stroke simply causes the movable end Wall ll to more further toward the right,l as Viewed en the the drawings, against the resiliency inherent in the flexible wall 8 orl the spring 2O or both, the yoke moving away from the cam or eccentric 17, until the shock of the inertia of the fuel is absorbed by the force of resiliency.

As long as the carburetor or other fueleonsuming elements are using fuel as fast as the same is pumped from the casing l() the movable end wall 1l will make its full stroke in each direction. If the pump tends to supply fuel to the fuel-consuming elements more rapidly than it is used thereby, however, a pressure is built up in the system between said pump and the fuel-consuming elements and this pressure balances the force of resiliency which tends to move the movable end wall toward the left, as viewed on the drawings, at some point in the stroke of said wall. The length of the pressure stroke of the pumping member is therefore diminished to conform with the rate of consumption of the fuel. As the cam or eccentric rotates it again picks up the yoke to move it toward the right, but the return or pressure strek-e of the pumping member is always conditioned by the pressure within the 1pump casing so that the length of said stroke varies automatically with the variations of pressure. rl`hereby the pumping member automatically maintains a predetermined pressure within the pump easing and the system leading to the fuel-consuming'elements and can never exceed said. pressure.

lVhen the engine is stopped the pump is also stopped, but if the valve mechanism be arranged as shown in the embodiment of Fig. 2, the fuel cannot drain out of the pump casing or be siphoned out in the event of leaky valves. rllherefore, the pump casing remains primed for the next operation of the pump and the latter' is ready to supply fuel to the engine as promptly as the engine is started.. Moreover, with the arrangement of valves shown, the inertia of the oil llo wing to the pump tends to carry the same through the outlet valve so to increase the etliciency of the pump and reduce the tendency to build up high instantaneous pressures in the pump casing. `When a receiver is provided between the pump and the fuel-consuming elements the supply of fuel to the latter is rendered.

substantially continuous notwithstanding the interniittent pressure strokes of the pumping member, the oil flowing from the pump during the pressure stroke building up a pressure in the receiver against the resiliency inherent in the wall 70 er the spring 73 er beth, and during the suction stroke of the pumping member said wall 70 expanding to continue the supply to the fuel-consuming elements. It is to be expressl understood, however, that the provision o a receiver is not essential t-o the present invention since, by so designing the pump that it tends to supply fuel in excess of the rate of consumption thereof so that a pressure is always maintained on the fuel in the system between said pump and the fuel-consuming elements, said pressure tends to maintain a continuous supply to said elements whereby a receiver becomes unnecessary.

t will therefore be perceived that a fuelfceding system has been provided wherein 'the pump has a stroke which varies automatically with the consumption of fuel and wherein the pump is so constructed as to absorb the pressures which the inertia of the fuel tends to build up therein. Therefore the provision of devices to prevent the building up of excessive pressures in the system and to by-pastt` excess fuel back to the source becomes unnecessary. Furthermore, the construction of the pump so that excess pressures are not built up therein prevents overstress of the flexible member, insures its long life, and renders practicable the use of the same as a pumping member.

Again, it will be perceived that a fuel- :feedin system has been provided which insures a substantially continuous supply of fuel to the fuel-consuming elements and one which. in the preferred embodiment, insures that the pump casing shall not be drained when the engine is standing idle. Again, it will be perceived that a fuel-feeding system has been provided which is applicable to a wide variety of engines and the pump of which can be positioned at any convenient location with respect thereto. Furthermore, the fuel-feeding system provided does not require any particular location of the fuel tank nor of the carbureter or other fuelconsuming elements; it is compact so that it may be conveniently located under the usual engine hood; it can be readily adapted to any engine speed and is simple to install; it is composed of a relatively few parts that are inexpensive to manufacture and assemble; and it is highly efficient in operation.

lllhile the embodiments shown on the drawings have been described with conirable particularity it is to be expressly 'understood that the invention is notrestricted thereto the same is capable of receiving a variety of mechanical expressions some of which will readily suggest themselves to those skilled in the art while certain parts can be used without other parts thereof. While the pump is shown as applied to the feeding of fuel it is to be eX- pressly understood that the invention is not limited to such use of the pump as it embraces the improved pump applied to other uses; while the preferred embodiment of the invention employs a flexible pumping member, the invention in some of its broader aspects is not limited thereto as other resiliently actuated members may be employed to secure some of the novel results accomplished by the present invention. Changes