US2543105A

US2543105A - Fuel mixing chamber

Info

Publication number: US2543105A
Application number: US53295A
Authority: US
Inventors: John P Harrison
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-10-07
Filing date: 1948-10-07
Publication date: 1951-02-27
Anticipated expiration: 1968-02-27

Description

Feb 27, 1951 J. P. HARRISON FUEL MIXING CHAMBER Filed Oct. 7, 1948 \K v @WW M Vk mm mm mm mm MN I. YR

5 72 2 k IIFMJI 2 9. 6 Z Z/% Yk vA3 i n 2 w V WmL OZ m M%W@ 5 \v k 5 8 5 3 7 3 INVENTOR JOHN P. HARRiSON,

flhtiwm A T TOR/VEVJ Patented Feb. 27, 1951 UN lTliD STATES; 05F F ICE...

FUEL MIXING CHAMBER J ohn P. Harrison, Versailles, Ind..

Application October-'7, 1948, Serial-No.-53,-295'- 3;'Claims.= (Cl. 48..-180') My" present inventionxrelates to ifuelimixingy chambers and has for its:objectitozprovider.a device which will more thoroughly mix-gliquid; and gaseous fuels to bringjabout tamore-tcompletes combustion of the mixture when used in-internal combustion engines, ,heatingj devices :or: the :like.

The consumption of high: speed'engineszinuse at the presenttime is so great that fuel from the carburetor is channelized atthe core of the air stream resulting in a'mixturewhichisricher in this channel and progressively leanertoward itsperiphery. As an example of this accelerated. fuel demand it is appropriate .to. observe that as single cylinder four cycleengine-operating at 3600 R. P. M. will have successive intake-strokes: at intervals of ,of asecond. It is"obvious -.that.- the limited amount of affinity.betweentfuelzandi air requires too much time to .effect a:uniform: mixture in the ordinary fuel line :and since-ibis mechanically impractical to provide. an intake.- a

pipe of an infinite length between. the =..car.buretor and engine there arises the. necessityv of producing ameans of forcingsuch aimixture;

Itis accordingly; a further :obj ect of :my; inven- 4 tion to take themixtureasit comes "from the carburetor and divide it so that part'goes-through; one channel and the remainder through two other, channels where it is: finely "dividedrby; pressing through many hundreds .of orifices and so merged. with the-fuel in the first channel.

Another object of my-present invention. is. to produce an efiicient gas'mixing chamber. which. is compact in 1 design 4 thereby occupying. a-mini mum of space in the mechanical apparatus with: which it may be used..

Stillother objects and advantages will become apparent from the followingdescription of the present. invention illustrated in the accompany-.- ing drawing in which:

Figure 1 is aplan view of the device.

Figure 2 is an enlarged sectionalviewtakenon line 2-2-01? Fig. 1, thecoactingrpartsiof the carburetor and. intake manifold. being. shown. fragmentarily.

Figure 3 is a partial plan view. of one.ofv the. perforated mixing plates.

Similar reference characters. in. the. several. figures indicate similar. parts..

Referring first to Fig. 2.. of the. drawing, I. indicates apipe leading. from a. carburetor. or. mixing valve (not shown),.which.supplies. acorn: bustible mixturev to.theintake..manifold; 21, of. aninternal combustion engine or heating device.

Conveniently, locatedbetween the pipe. I. and. manifold .2.is a mixing;ohamber..3;prvided with ashallownylindrical body portion diand a mating. circular cover .5.-. A circular horizontal fiangefii isslocated at the top of :the bodyland cooperates. with a groove ".formediion the inner face :of the;

cover '5 to "holdxagasket 'l'lforming .an air tight sealwhen the bodyaand cover. are rigidly. joined.

by a plurality of metal rivetsifl; passing through: alined apertures '9; uniformly distributed. around I the peripheries .of the cover. and the body flange:

A.boss: lll-fforined-onv the .1 outer; face. of a the. cover 5 isprovided with.;a .pairof threaded holes..-

Thesea bolts;

I l .to;;receive connecting bolts. 12. passethrough apertures: 13; carried by an abut: ment'flange. Mon the-:end of the carburetor out: let or pipe and-by such. means the mixing chamr bertassembly is rigidly fixed tothecarburetcr; A similaraattaching arrangement isaprovided at the opposite endofztheimixing chamber for securing the .boss [5 on the bodytoafiangelfi located on the intakemanifold of the engine.

Suspended within the 'abovedescribed casing. by means ofspacer posts I1, is a circular mixing. plate orzdisc l8 which cooperates with the inner surface I9 =-of .the cover: to form a radial channel 20. The channel 20 is sealed at its periphery by a ring flange 2i projecting from the face of they cover 5 aclistance equal to the length of the posts ll.- The ring 2| performs a dual purpose in that italsoprovides one faceof the angular groove 2!] mentioned above as the recipient of body flange 5..

The mixingplate !8 contains a central aperture 22.:alinedwithand of equal diameter to an intake throat 23 in the cover. The plate is fur,-

therprovided with an infinite number of small orifices Zllpositioned in a staggered arrangement so that any part of astream of fuel mixture.

moving radially-from the center of the chamber toward the outer, edge of. the. channel 29, will have to. pass some of theseorifices.

Ilocate aplurality .ofsupporting posts 25 on the inner surface 26. of? the body. member. These supports are of greater length than the posts. ll, previously. mentioned and have fixed ,to their upper ends an .imperviousdisc 2'! which coacts with the surface 26 of the body toform a radiating discharge channel.28.. This channel surrounds the outlet, or. throat 29in the boss, IEpfthechamber body.

Securedtothe periphery of the upper surface of .the .discfil' isaring-shapedcspacer 30- which carries. a,. second mixing plate'SI. spaced. equi distantly between theplate. I8 and disc Q21. The

mixing plate 3| cooperates with plateJSand disc.

2} .to respectively define. radiating. channels 32' and 33. The channel 32, which for the purpose of illustration, may be termed the intermediate channel, is open at its lower peripheral edge and discharges into a vertical cylindrical passageway 34 defined by the rim 35 of the body 3 and the ring-shaped spacer 30. The passageway 34 it will be observed is also a continuation of the outer circular edge of the aforementioned discharge channel 28.

The channel 33 being sealed at its periphery by the spacing ring 30 has for its outlet an infinite number of orifices 36, similar in plan to the aforementioned orifioes 24. Mixing plate 3| likewise has a central aperture 31 which assists the corresponding aperture of plate I8 in outlining a well-like extension of the intake throat 23, the bottom of which is defined by the disc 21.

In determining the vertical depth of the three radiating channels as viewed in Fig. 2, the cooperating surfaces of the elements are so spaced that the combined cylindrical inlet areas of the channels as defined by the intersection of the channels and the central well will be equal to the cross sectional area of the inlet throat.

The orifices 2d and 36 are preferably of small diameter and numerous in quantity so as to provide each mixing plate with a more effective fuel dividing operation. The total combined area of the

orifices

24 and 36 is immaterial as long as the minimum number in such area provide an ample discharge of the fuel metered by their respective channels. Thus, if a carburetor having a 1 inch throat is used the minimum number of orifices of .04 inch diameter in each mixing plate will be 491, making a total of at least 982 orifices spraying into the intermediate channel. It will of course be understood that the number of spraying orifices may be further increased thereby increasing the effectiveness of the mixing plates.

Since the area of channel 32 progressively increases from the center, it will be seen that it thus accommodates additional fluid as injected from the outer channels by the orifices. The passageway 34 and discharge channel 28 are accordingly of sufiicient cross sectional area thus accommodating the combined output of the three metering channels 32 and 33.

In the operation of the device the mixture from the carburetor is drawn through the throat 23 into the central well formed by the apertures in the mixing plates. The mixture then takes three separate routes. A part flows through the intermediate channel, defined by the plates [8 and SI, and that remaining is divided between the two outer channels 20 and 33. Thence the fluid is forced through the infinite number of

interstices

24 and 36 which causes it to be finely divided and sprayed into the intermediate stream in channel 32 for thorough mixing with such stream. The effectively mixed fuel then flows through the passageway 34 into the discharge channel 28 from which it is fed to the intake manifold of the engine.

From the foregoing description of the present invention, it will be seen that by the use of profusely perforated plates set in spaced relation to each other I am able to divide the carburetor mixture into separate streams of which the outermost is sprayed back into the intermediate stream for complete mixing. The structure presents a compact and effective device for providing an internal combustion or heating apparatus with thoroughly comminuted and mixed fuel for economic and efficient operation.

While a preferred form of the invention has 4 been shown and described, it will be understood that variations in details of form may be made without departure from the invention as defined in the appended claims.

I claim:

1. A device for mixing fuel comprising a casing having, an end wall and an inlet opening substantially centrally located in said wall, said casing also having an outlet opening; a first plate, a second plate and an imperforate disc all parallel to said wall and successively spaced therefrom and from one another to form parallel channels between the wall and the first plate, between the plates and between the second plate and the disc; each of said plates having a central aperture in alignment with the inlet opening and each also having a multiplicity of small orifices surrounding the aperture; means radially exterior of the orifice in said first plate closing the channel between said wall and said first plate; means radially exterior of the orifices in said second plate and enclosing the channel between said plate and said disc, said disc and the wall of the casing opposite the aforementioned end wall forming at least in part a channel for conducting mixed fuel from the channel between said plates to said outlet; whereby fuel is taken in through the inlet opening and the fuel from the channels between the wall and the first plate and between the second plate and the disc are injected into the fuel in the channel between the plates by way of said orifices and the mixture is discharged through the outlet opening.

2. A device for mixing fuel comprising a casing having an end wall and an inlet opening in said wall, said casing also having an outlet opening; a first plate, a second plate and an imperforate disc all substantially parallel to said wall and successively spaced therefrom and from one another to form substantially parallel channels between the wall and the first plate, between the plates and between the second plate and the disc; each of said plates having a central aperture in substantial alignment with the inlet opening and each also having a multiplicity of small orifices surrounding the aperture; means radially exterior of the orifices in said first plate closing the channel between said wall and said first plate; means radially exterior of the orifices in said second plate and closing the channel between said plate and said disc, said disc and the wall of the casing opposite the aforementioned end wall forming at least in part a channel for conducting mixed fuel from the channel between said plates to said outlet; whereby fuel is taken in through the inlet opening and the fuel from the channels between the wall and the first plate and between the second plate and the disc are injected into the fuel in the channel between the plates by way of said orifices and the mixture is discharged through the outlet opening.

3. A device for mixing fuel comprising a casing having an end wall and an inlet opening in said wall, said casing also having an outlet opening, a first plate, a second plate and an imperforate disc all substantially parallel to said wall and successively spaced therefrom and from one another to form substantially parallel channels between the wall and the first plate, between the plates and between the second plate and the disc; each of said plates having a central aperture in substantial alignment with the inlet opening and each also having a multiplicity of small orifices surrounding the aperture; means radially exterior of the orifices in said first plate closing the channel between said wall and th first plate; means radially exterior of the orifices in said second plate and closing the channel between said second plate and said disc, said casing having passage means therein for conducting mixed fuel from the channel between said plates to said outlet; whereby fuel is taken in through the inlet opening and the fuel from the channels between the wall and the first plate and between the sec-- end plate and the disc are injected into the fuel in the channel between the plates by way of said orifices, and the mixture is discharged through the outlet opening.

JOHN P, HARRISON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,014,391 Hathcock Jan. 9, 1912 1,312,147 Wallwin Aug. 5, 1919 1,312,240 Ervin Aug. 5, 1919 1,471,704 Palizza Oct. 23, 1923 1,595,995 Clefton Aug. 17, 1926 FOREIGN PATENTS Number Country Date 9,019 Holland May 15, 1923