US3086758A - Apparatus for carburetion - Google Patents

Description

April 23, 1963 R. A. GREENE APPARATUS FORCARBURETION 2 Sheets-Sheet 1 Filed June 29. 1961 INVENTOR.

(7kb-ENE M TToRn/f PS April 23, 1963 R. A. GREENE 3,086,753

APPARATUS FOR CARBURETION Filed June 29, 1961 2 Sheets-Sheet 2 92 92 INVENToR.

94 94 Rosi/a7 f1. @eff/vf ,3 Wam/514s United States Patent O 3,035,758 APPARATUS FOR CARBURETION Robert A. Greene, S50 Seabreeze Blvd., Suite 4, Daytona Beach, Fla. Filed June 29, 1961, Ser. No. 120,677 16 Claims. (Cl. 2611-44) This invention relates to apparatus for carburetion and is by way of being a further improvement and developlo ment in this field over what is disclosed and claimed in my co-pending Unit-ed States application, Serial No. 762,369, Method and Apparatus for Carburetion, filed September 22, 1958, now Patent 3,006,619.

In my Patent 3,006,619 I disclose a carburetor having an iris type diaphragm with fuel-supplying jets arranged in associatoin therewith so as t'o become progressively effective as the diaphragm opens. In the present -application somewhat the same principle is employed in that there are a plurality of fuel-supplying jets in the carburetor which become progressively effective as an air supply control member is moved from closed to open position.

A particular object of the present invention is the provision of an improved lapparatus for carburetion which will maintain a more uniform ratio of fuel to `air throughout lthe range of operating conditions of the carburetor than has been possible heretofore.

Another object of this invention is the provision of a novel jet arrangement for carburetors with the jets being directly and positively under the control of a movable air supply control member.

Still another object of this invention is the provision of la carburetor arrangement having a plurality of jets in which the jets are gradually positively closed off when the air supply control member of the carburetor moves toward -a closed position, and wherein each jet has substantially the same fluid supply as every other jet leading to uniform operating conditions.

These and other objects of the present invention will become more apparent upon reference to the following specification taken in connection with the laccompanying drawings in which:

FIGURE l is a vertical sectional view through one carburetor arrangement according to my invention;

FIGURE 2 is a vertical sectional view indicated byline 2 2 on FIGURE 1;

FIGURE 3 is a perspective view showing the movable air control member or slide valve and the jets controlled thereby;

FIGURE 4 is a vertical sectional view indicated by line 4 4 on FIGURE 3 showing at ysomewhat enlarged scale one of the' jets of the carburetor;

FIGURE 5 is -a sectional view indicated byline 5 5 on FIGURE l showing the manner in which the slide valve is sealed at the wall of the carburetor;

FIGURE 6 is a View similar to FIGURE 1, but showing a somewhat dierent-arrangement;

FIGURE 7 is a plan sectional view of the `arrangement of FIGURE 6 and is indicated byline 7 7 on FIGURE 6;

FIGURE 8 is a sectional View through one of the jets and is indicated by line 8 3 on FIGURE 7;

FIGURE 9 is a fragmentary view showing'the manner -in which the rod for adjusting the slide valve of the carburetor is connected to the slide valve;

FIGURE 10 is a perspective view showing a somewhat different slide valve arrangement;

FIGURE 1l is a perspective view like FIGURE 10, but showing still another slide valve arrangement;

FIGURE 12 is a sectional view indicated by line 12-12 3,@3S Patented Apr. 23, 1963 on FIGURE 11 showing the varrangement for supplying fluid fuel to the jets;

FIGURE 13 is a sectional view indicated byline 13 13 on FIGURE l2 showing one of the jets in section and the fuel supply conduit leading thereto;

FIGURE 14 lis -a perspective View showing still another -type of slide valve arrangement; and

FIGURE l5 is `a sectional View indicated by line 15-15 on FIGURE 14 showing the slide valve arrangement thereof in cross-section.

Referring to the drawings somewhat more in detail, in FIGURES l and 2 there is shown a carburetor arrangement comprising thebody part 10 forming a down-draft passage fromair cleaner 12 toengine manifold 14. Attached to the side of body part 1G is a fuel supply chamber 16 adapted for being supplied with fuel in any conventional manner, as by a pump, `and having conventional means therein such as a float controlled valve for maintaining the liquid level therein at a predetermined fixed point.

Fuel chamber 16 communicates by way `of a conduit 1S in body part I0 with a jet block 2d which consists of a generally L-shaped .inverted member having thevertical leg part 22 and at the top the laterally extendinghorizontal leg part 24. Extending along the bottom ofvertical leg part 22 is apassage 26 to whichconduit 18 is connected for supplying liquid fuel thereto.

In the laterally extendingleg part 24 is a plurality of venturi shaped passages 26a which form the jets for the carburetor. Each of these passages has achannel 28 leading from the throat topassage 26 so that each jet has fuel supplied individually thereto frompassage 26 so that the fuel supply to all of the jets is uniform at all times.

According t'o this invention, -thejet block 20 extends substantially completely across body part I0 with the jets arranged on about a diameter thereof. The passage of air through the passage in the carburetor is under the control of aslide valve 30 which, Ias will 'best be seen in FIGURE 4, rests on top of the transversely extendingleg 24 of the assembly block and has an L-shaped mem'-ber 32 connected therewith that engages the bottom ofleg part 24. It will be observed that the jets 26a are closed at both the top and bottom by the slide valve when the valve is positioned to make the jets inoperative.

As will be seen in FIGURE 3, theslide valve 30 is supported on aplate element 34 carried in the upper part ofbody 10 and which plate has anopening 36 through which air ows downwardly through thebody 10. The jet block is located in about the middle of this opening and slideably resting on the plate is theaforementioned slide valve 30.Guide elements 38 are carried by theplate 34 so as to support and guide slide valve SG.

It will be appreciated that whenslide valve 36 is moved toward the right as it is viewed in FIGURES l and 3, the opening for air is progressively increased while the individual jets of the jet assembly block are made successively effective thereby maintaining a constant ratio of fuel to air in the combustible mixture being drawn from the carburetor and into the intake manifold.

For the purpose of controlling the idling speed of the carburetor, there is a jet 26h at the extreme left end of the jet assembly block as it is viewed in FIGURES l and 3 which is always exposed since theslide valve 30 never completely covers this jet. The exact position of the slide valve in its engine idling position is under the control of anabutment screw 40 while the fuel supplied through the idling jet 26h can be regulated by theadjustable needle valve 42. In this manner, engine idling conditions are under complete control, but this control, of course, has no effect on the operation of the carburetor when the slide valve is open.

Operation of the slide valve can be had by connecting a rod 44 thereto which is under manual control as by being connected with the vehicle accelerator pedal.

The slidevalve is sealed to body so that the slide valve can be moved without admitting air from the side thereof by a resilient rubber-like sealing means generally indicated at 46 in FIGURES 1 and 5. Numerous sealing arrangements are possible, and in many cases a close fitting metal to metal seal will be satisfactory, although I prefer to employ a gasket means as illustrated.

`In the modification of FIGURES `6 through 9, the Ybody part of the carburetor is indicated at 50 and there is a jet lassembly 52 therein having `'afuel supply passage 54 and the channels 56 leading from the yfuel supply passage to the individual jets '58 arranged in a laterally extending portion of the jet assembly at the top thereof.

In the FIGURES 6 through 9` modification, I obtain distribution of the fuel supplied over substantially the entire area of the yair fiow passage by arranging the jets in a plurality of rows, for example, in two rows arranged to form a V as inV FIGURE 7.

Inasmuch yas the jet-s -are arranged to form a V, theslide valve 60 merely engages the top of the jet Iassemblyblock 52 and does not close ofi the under sides of thejets 58. The plate on which theslide valve 60 rests is identified at 62, and this is 'a member that rests on top of thebody 10. The plate carries guide means `64 for the slide valve and there is a valve actuatingrod 66 extending sealingly through awall member 68 formed in an extension 70 that is a part of the valve body.

As in the fir-st modification,idler jet 58a is provided with the fuel supply thereto being under the control of theadjustable needle valve 72. The idling position of the slide valve, which is illustrated at FIGURE 7, can, las in the first modification, be under the control of -anabutment screw 74 carried byrod 66.

FIGURE 10 shows a slight modification in the construction of a slide valve member 76 'which is so formed as toV havenotch 78 at the inner end thereof, which provides an opening for the movement of air past the idler jet when the slide valve is closed.

FIGURES 11, 12 and 13 show an arrangement wherein there are two parallel rows of jets as at 80 and 82, which Iare under the control of aslide valve member 84.Slide valve member 84 has acentral notch 86 for exposing idler jet y8S when the slide valve is closed and also has somewhatshorter notches 90 at the sides so that the first opening movement of the slide valve will commence to expose the main jets.

'As will be seen in FIGURES 12 land y11i, the jets are supported in ablock 92 having fuel passage means 94 therein corresponding to the passage means 26 described in connection with the Ifirst modification.

FIGURES 14 and 15 show a modified arrangement wherein there is aslide valve 100 semi-circular in crosssection and which slides in an arcuate guide means 102 on asupport plate 104. The jet block is indicated at 106 andV is constructed about the sa-me yas the jet block in the first described modification. As in the first described modification, and as in the modification of FIGURES 11 through 13, -slide valve 100 has an L-shapedmember 108 lattached thereto so that both the tops and botto'ms of the jet passages Iare closed by the slide -Valve as it moves toward closed position.

It will be understood that this invention is susceptible to modification in order to adapt it to different usages and conditions; and, accordingly, it is desired to comprehend such modifications within this invention as may fall within the scope of the appended claims.

I claim:

1. In a carburetor; a carburetor body having yan air flow passage therethrough, la jet block lfixedly mounted in said passage having a plurality of individual jets therein distributed in a plane transverse to said air passage, means for supplying lfuel to said jets, and a slide valve in said passage movable laterally therein for controlling the flow of air therethrough, said slide valve having a surface coplanar with one end of said jets so as progressively to uncover the jets when moving in the opening direction and progressively to close the jets when moving in the closing direction.

2. In a carburetor; a carburetor body having an air flow passage therethrough, a jet block xedly mounted in' said passage having a plurality of individual jets therein distributed in a plane transverse to said air passage, means for supplying fuel to said jets, and a slide valve in said passage movable laterally therein for con-trolling the fiow of air therethrough, so as progressively to uncover the jets when moving in the opening direction and progressively to lclose the jets when' moving in the 'closing direction, an idler jet in said passage, and said slide valve being arranged to permit air flow past said idler jet when the slide valve is in its closed position.

3. In a carburetor; a carburetor body having a vertical air flow passage therethrough, a jet block xedly mounted in said passage having a plurality of jets therein distributed in a lateral direction relative to said air passage, a slide valve in said air passage movable laterally thereof for controlling lthe flow of air through the passage, said jets having upper open ends, and said slide valve having la surface coplanar with said upper open ends of said jets for engaging and closing said jets progressively when the valve moves in its closing direction.

4. In a carburetor; a carburetor body having a vertical air fio'w passage therethrough, a plurality of jet means distributed in a lateral plane in said air flow passage in fixed positions therein, each jet means comprising a vertical venturi having open topl and bottom ends and huid supply means connected to the throat thereof, a slide valve in Isaid passage movable laterally thereof for con'- trolling the flow of Iair therethrough, and said slide valve having a surface coplanar with the upper open ends of said jet means to interrupt the iiow of air therethrough when the slide valve is disposed in closing relation thereto.

v5. In a carburetor; a carburetor body having a vertical air flow passage therethrough, a plurality of jet means distributed in a lateral plane in' said air flow passage in fixed positions therein, each jet means comprising a vertical venturi having open top and bottom ends and fluid supply means connected to the throat thereof, :a slide valveV in said passage movable laterally thereof for controlling the dow of air therethrough, and said slide valve having a surface coplanar with the upper open ends of said jet means to interrupt the flow of air therethrough when the slide valve is disposed in closing relation thereto, and said jet means being distributed so as to be progressively opened one at a time by said slide valve as it moves in its opening direction andV to be progressively closed one at -a time by the slide valve as it moves in its closing direction.

I6. In a carburetor; 'a carburetor body having a vertical flow passage therethrough, a plurality of individual jets distributed in a lateral plane in said'passage, each jet comprising a vertical venturi passage and fuel supply means connected to the throat thereof, a slide valve carried by said body an'd movable laterally of said passage controlling vthe flow of air therethrough, said slide valve having its bottom surface in said plane of the upper ends of said jets so as to progressively open and close said jets during opening and closing movements respectively of said slide valve, and a means carried by said slide valve engaging the lower ends of said jets and being coextensive with said slide valve in the direction of movement thereof for controlling the lower ends of said jets simultaneously with the controlling of the upper ends thereof.

7. In a carburetor; a canburetor body having a vertical flow passage therethrough, a jet block in said passage, a plurality of jets arranged in the jet block, each `comprising a vertical venturi and fuel supply means connected to the throat thereof, a slide `valve slideable laterally in said body for controlling the ow of air through said passage, said slide valve engaging the upper ends of said jets, said jets being arranged in ya row across the block in the direction of Imovement of the slide valve and an L-shaped member carried by the slide valve extendin-g beneath the jets and controlling the lower ends thereof simultaneously with the controlling of the upper ends thereof.

8. In a carburetor; a -carburetor body having a vertical flow passage therethrough, a jet block in said passage, a plurality of jets arranged in the jet block, each comprising a vertical venturi and `fuel supply means connected to the throat thereof, a slide valve slideable laterally in said body for controlling the ow of air through said passage, said slide valve engaging the upper ends of said jets, said jets being arranged in a :plurality of rows extending parallel to the direction of movement of said slide valve, and means on said slide valve engaging .the ends of said jets for controlling the lower ends thereof simultaneously with the control of the upper ends thereof.

9. lIn a carburetor; a carburetor body having a vertical air flow passage therethrough, a jet block carried by the body and extending across said passage, said block having a laterally offset portion at its upper end, a slide valve movable laterally in said air passage and resting on the top of said laterally offset portion, a member carried by the slide valve engaging the under side of said laterally offset portion, a plurality of jets in said laterally offset portion, each comprising :a vertical venturi passage extending through said portion and fuel supply means leading to the throat of each said venturi passage.

10. ln a carburetor; a carburetor body having a vertical air flow passage therethrough, Ia jet block carried by the body and extending across said passage, said block having a laterally offset portion at its upper end, a slide valve movable laterally in said vair passage and resting on the top of said laterally offset portion, a member carried by the slide valve engaging the under side of said laterally offset portion, a plurality of jets in said laterally offset portion, each comprising -a vertical venturi passage extending through said portion and fuel supply means leading to the throat of each said venturi passage, there being an idler jet adjacent the side of the llow passage toward which the slide valve moves in its closing direction and means pertaining to the slide valve for permitting air flow through the passage in the region of said idler jet when the slide valve is in its closed position.

Y l. ln a carburetor; a carburetor body having a vertical air flow passage therethrough, a jet block carried by the body and extending across said passage, said block having a laterally offset portion at its upper end, a slide valve movable laterally in said passage and resting on the top of said laterally offset portion, a member carried by the slide valve engaging the under side of said laterally oifset portion, a plurality of jets in said laterally offset portion, each comprising a vertical venturi passage extending through said portion and fuel supply means leading to the throat of each said venturi passage, there being an idler jet adjacent the side of the oW passage toward which the slide valve moves in its closing direction and means pertaining to the slide valve for permitting air flow through the passage in the region of said idler jet when the slide valve is in its closed position, there being a main fuel supply passage in said jet block, individual channels leading from said fuel supply to the throat of said venturi passages.

12. ln a carburetor; a carburetor body having a vertical air ow passage therethrough, a jet block carried by the body and extending across said passage, said block having a laterally offset portion at its upper end, a slide valve movable laterally in said air passage and resting on the top of said laterally offset portion, a member carried by the slide valve engaging the under side of said laterally offset portion, a plurality of jets in said laterally odset portion, each comprising a vertical venturi passage extending ythrough said por-tion and fuel supply means leading to the throat of each said venturi passage, there being an idler jet adjacent the side of the ow passage toward which the slide valve moves in its closing direction vand means pertaining to the slide valve for permitting air flow through the passage in the region of said idler jet when the slide valve is in its closed position, there being a main fuel supply passage in said jet block, individual channels lending from said fuel supply to the throat of said venturi passages, a float controlled fuel supply chamber, and means connecting said chamber with said main fuel supply passage.

13. In a carburetor; a carburetor body having a vertical air ow passage therethrough, a jet block carried by the body and extending across said passage, said block being relatively narrow and having a laterally offset portion at its upper end, a support plate adjacent the upper end of the jet block having an aperture through which air flows in passing through said air passage, a slide valve slideably mounted on said plate and having its one surface coplanar with the upper surface of said offset portion, guide means on said plate guiding and sealing said slide valve so that it can be moved laterally in said air passage to control air flow therethrough, a member carried by the slide valve engaging the under side of the laterally offset portion of said jet block, said member being substantially coextensive With said slide valve, a plurality of jets in said laterally offset portion, each jet comprising a vertical venturi passage extending completely through said offset portion, fuel supply means leading to the throat of each said venturi passage, an idler jet adjacent the side of the air ilow passage toward which the slide valve moves in its closing direction, means associated with the slide valve for permitting air flow through .the passage in the region of said idler jet when the slide valve is in its closed position, adjustable means for controlling the fuel supply to said idler jet, and adjustable means associated with said slide valve for determining the closed position thereof.

14. In a carburetor; a carburetor body having a vertical air ow passage therethrough, a jet block carried by the body and extending across said passage, said block being relatively narrow and having a laterally yoffset portion at its upper end, a support plate adjacent the upper end of the jet block having an aperture through which air flows in passing through said air passage, a slide valve slideably mounted on said plate and having its one surface coplanar with the upper surface of said offset portion, guide means on said plate guiding and sealing said slide valve so that it can be moved laterally in said air passage to control air flow therethrough, a member carried by the slide valve engaging the under side of the laterally offset portion of said jet block, said member being substantially coextensive with said slide valve, a plurality of jets in said laterally oifset portion, each jet comprising a vertical venturi passage extending completely through -said offset portion, fuel supply means leading to the throat of each sai-d venturi passage, an idler jet adjacent the side of the air ilow passage toward which the slide valve moves in its closing direction, means associated wtih the slide valve for permitting air oW through the passage in the region of said idler jet when the slide valve i-s in its closed position, adjustable means for controlling the fuel supply to said idler jet, and adjustable means associated with said slide valve for determining the closed position thereof, said fuel supply means comprising individual channels leading from the throats of said venturies downwardly to a lower portion of said jet block, a main fuel supply conduit in the lower portion of said jet block into which said channels open, .aud a float controlled fuel supply chamber connected to said main fuel supply conduit.

15. In a carburetor; a carburetor body having a vertical air ow passage therethrough, a jet block in said passage having a plurality of jets therein distributed in a adsense lateral direction relative to said air passage, a slide valve in said ai-r passage, movable laterally thereof Vfor controlling the flow of air through the passage, said jets having upper open ends, and said slide valve being adapted for engaging and closing said jets progressively when the valve moves in it-s closing direction, an apertured plate on which said slide valve rests and on which the slide valve slides when moving laterally of the air passage, said slide valve being at on the bottom and arcuate on the top, and arcuate guide means carried lby the plate engaging the slide valve for guiding it in its sliding movements.

16. In a carburetor; va carburetor body having a vertical air ow passage therethrough, a plurality of jet means distributed in a lateral plane in said air ow passage, each jet means comprising a vertical venturi andfluid supply 15 3,006,619

means connected to the throat thereof, a .slide valve in said passage movable laterally thereof for controlling the ow of air therethrough, and said slide Valve engaging the upper yopen ends of said jet means to interrupt the flow of air therethrough when the slide valve is disposed in closing relation thereto, said slide Valve being semicircular in cross-'section with the at side `on the bottom, a plate `on which the slide valve rests having an aperture controlled by the slide valve, and semi-circular guide means on the plate engaging the top of the yslide valve for supporting and gui-ding the slide valve.

References Cited in the file of this patent UNITED STATES PATENTS Greene Oct. 31, 196-1

Claims (1)

1. IN A CARBURETOR; A CARBURETOR BODY HAVING AN AIR FLOW PASSAGE THERETHROUGH, A JET BLOCK FIXEDLY MOUNTED IN SAID PASSAGE HAVING A PLURALITY OF INDIVIDUAL JETS THEREIN DISTRIBUTED IN A PLANE TRANSVERSE TO SAID AIR PASSAGE, MEANS FOR SUPPLYING FUEL TO SAID JETS, AND A SLIDE VALVE IN SAID PASSAGE MOVABLE LATERALLY THEREIN FOR CONTROLLING THE FLOW

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