US1251570A - Carbureter. - Google Patents

Description

E. c. FRAM CA'HBURETER.

, APPLICATION FIL ED NOV-3..191 4-' 7 1,251,570. Patented Jan. 1, 191&

2 SHEETS-SHEET WITNESSES "INVENTOR UNITED STATES nnosair ornamnn, or nnrnorr, MICHIGAN, ASSIG1\TOR To soornrn ANONYME DU CARBUBATEURZENITH, or LYON, FRANCE, A CORPORATION or rnnncn angelic-nurse.

Specification of Letters Patent.

Patented Jan, 1918.

Application filed November 3, 1914. Serial No. 870,053.

To all whom it may concern:

Be it known that I, ENOGAT C. PR'ADLER, a citizen ofthe French Republic, residing at Detroit, in the county of VVay'ne and State of 'Michigan, have invented a new and useful Carburetor, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in wh1ch- Figure l is a vertical longitudinal section showing oneform of my improved carbureter.

Fig. 2 is a cross section on the line II-II of Fig. l, and Y Fig. 3 is a partial longitudinal section showing another form of the invention.

My invention relates to that type ofcarbureter wherein there are two separate streams of gasolene, either split from a common flow channel or consisting of two separate supply channels. In the well known zenith typeoi carbureter, described in the United States patent to 'Baverey, No. 907,- 953, dated December 29, 1908, these separate gasolene streams are fed to two separatenozzles or jets. One of these flows is fed into an atmospheric well where the suction is practically killed, so that the suction flow to the other nozzle is compensated as it grows richerunder higher suctions, by the flow through the well controlled. jet, which is either practically constant or increases at less than the normal rate. I

invention is related to this general types? earbureter' and isdesigned to pro- 'videta, cheaper and simpler form whereinthe two'streams after passing control points are joined before they reach the jet or nozzle opening. In other words, whereas heretofore the two streams were only joined in the carbureter chamber after emerging from the jets to the jet openings, I join them before they reach the jet opening.

In this way a single jet opening is suiticient,'and a simpler construction is afijor'ded which also provides for supplying air through the center of the nozzle, if desired.

In the drawings, referring to Figs. land 2, 2 represents the usual constant level chamber, the level in which is shown as connut 22.

trolled by the ordinary float 3 and valve 4:. I

, 5 is the inlet nozzle, and 6 the air vent above a cavity 8 where it is branched orsplit.

One portion passes up through a micrometer'hole in a nut 9 into a well 10 having in itsupper portion air vent openings 11 lead- 2 ing to the atmosphere. There may be one or more of these openings of any desirable size. The gasolene passes from the well to a common chamber 14, while the other portion of gasolene from the cavity 8 leads through a micrometer hole in nut 12 to a cavity 13, which also communicates with the jet chamber 14.

In the form shown, an air tube 15 extends up through this-cavity to the top of the nozzle or jet tube 16, thus giving an annular or ring shaped nozzle, in which the two branch flows are joined and from which they are drawn out by the suction in the engine intake 17.

In the specific form shown the nuts Qand 12 having the micrometer holes are accessible for removal and replacing of the nuts through openings controlled by nuts 18 and 19; and the air tube 15 is secured to a removable nut 20 screwed in the bottom of the casting.

The gasolene flows from the well 10 to the common chamber 14; through a constricted opening 21, this being preferably made accessible through an opening in the outer wall or the structure, ,which is closed by a The air entering at 23 is sucked up over the nozzle and joins with the gasolene from the two fiows fed to said annular nozzle. The ordinary Venturi tube is shown at 24 and the usual butterfly throttle valve at 25.

To provide for easy starting, I preferably providea depending feed tube 26 which hangs down in the well 10 with its open lower end slightly abovethe bottom of the well, theupper portion of thistube being secured to a bushing 27 resting onshoulders 0f the lower casting, the castings being preferably joined on the line 12-42, as shown in Fig. 1. This bushing has a small hole 28 leading to a cavity 29 opening to the atmosphere through a hole 30 controlled by a conicalthumb screw 31, by which the amount of sub-atmosphere in the starting tube may be regulated. From the cavity 29 a feed channel leads into the intake passage opposite the throttle 25 when closed.

In the operation of the device, the main gasolene flow through the channel 7, which is of more than ample capacity to supply the total suction as fixed by the ring jet is split at the two flows, one passing up into the well through the regulated control orifice 9, and thence through control orifice 21 to the jet, while the other flow passes through the control opening in nut 12 into the same annular jet cavity. At rest, the gasolene will stand at the same level in the constant level chamber, the atmospheric well, the starting tube, and the annular jet. When the throttle is slightly opened and the engine turned over, the gasolene will be sucked out of the feed tube 26, giving a richer mixture for starting, and as the throttle is further opened the two compensating jets will then feed the engine, the main jet supplies a mixture which would grow richer as the speed increases, while the well controlled branch gives a-supply which is either constant or grows richer at less than the normal rate, the two feeds thus combining to give a mixture which is practically constant at all speeds.

In Fig. 3 I show a form similar to that of Figs. 1 and 2, except that the jet is a plain,

ordinary jet with no central air tube supplying air to the center of the jet opening.

In this form, similar parts are marked with similar numerals, with the prime mark ap plied thereto. In this case the common chamber 1 1' which is in communication with the bottom of the jet tube 16 receives the gasolenethrough a constricted opening 21 from the well 10 and through an opening in a nut 12. In this case the bottom nut 20' is solid and the nut 12 is adapted to be removed through the screw threaded opening in which the nut 20 is seated.

Another feature of my invention, not

claimed herein, lies in the means for attaching the float to its stem which forms the control valve for the entry of gasolene to the float'chamber. The float 3 is ordinarily soldered to its needle valve stem. -As these floats necessarily vary slightly in weight and size, it is important to obtain an adjustment of the float relative to its stem in order to bring the level to the proper point,

\ loads.

neaaavo the float would require adjustment the same as in a hollow float. The adjustment will also serve to compensate for any inaccurate machining or adjustment of the parts.

The advantages of my invention result from the simplicity and cheapness of the device and the substantially constant mixture which is obtained at varying suctions and The controlled constrictions are between the point of branching or splitting the flow and the point where the flows again unite before being drawn out of the jet. A single jet may thus be employed, while giving the same advantages as in the usual zenith type. It will be noticed that the Venturi tube is clamped in place by the mere act of joining the upper and lower castings on the line.ab, which also clamps the bushing which carries the starting tube. The device is of relatively few parts and may be cheaply and easily made and assembled. The nuts 9 and 12 are alike and are of small size, thus being easily and cheaply made. These nuts are all preferably packed, as shown.

Many variations may be made in the form and arrangement of the parts without de-' chamber and an atmospheric well open to the air, a common chamber supplying the jet opening, two channels having controlling openings leading from the constant level chambenone leading to the well and the other to the common chamber, and a -.channel having a control opening and leadingfrom the well to the common chamber; substantially as described.

2. A carbu'reter having a' constant level chamber, .a well outside of said chamber and open to the atmosphere, a common chamber supplying the jet opening, twochannels having controlling openings leading from the constant level chamber, one leading to the well and the-other to the common chamber, and a channel having a control opening and leading from the well to the common chamber; substantially as described.

3. A carbureter having an annular jet opening surrounding an air supply, said jet.

opening being arrang d to feed gasolene upwardly therethrougl. common chamber at till the bottom of said jet opening, and a plurality of gasolene supply channels each hav ing an independent control communicating with said common chamber and arranged to continuously feed fuel thereto; substantially as describe 4. A carbureter having a constant level chamber, a well outside of the chamber and open to the air, a common chamber feeding the jet opening, feed channels having control openings leading from the constant level chamber to the well andthe common chamber respectively, and a channel leading from.

the well to the common chamber; substantially as described. I 1

5. A carbureter having a constant level chamber, a well outside of the chamber and open to the air, a common'chamber feeding the jet opening, feed channels having control openings leading from the constant level chamber to thewell and the common chamber respectively, and a channel leading from the well to the common chamber, thecontrol openings being formed in removable bushings having calibrated substantially as described.

6. In a carbureter, a constant level supply chamber, acommon chamber below the level of the fuel. in the constant level supply chamber, a single annular jet opening leading from the commonochamber around an air tube, and two gasolene supplies leading from the constant level supply chamber to said commonchamber, each supply having an independent 'feed control device; substantially as described. f

7. A carbureter having a casing and a cover, there being a horizontal joint between the casing and the cover, said casing having a float chamber, an atmospheric well and an engine intake passage extending therethrough, the cover having an engine intake extending therethrough and in line. with the engine intake through the casing, said cover extending over the atmospheric well' and the float chamber and forming closures therefor, and meansfor securing the cover to the casing; substantially asdescribed.

8. A carbureter having a constant level chamber, a well outside of the chamber and open to the air, a common chamber feeding the jet opening, feed channels having con-.

perforations 9. A carbureter having a constant level supply chamber, a jet opening communicating with the engine intake, an atmospheric well communicating with the supply chamber, a connection leading from the atmospheric well to the engine intake, a common chamber communicating with the jet below the constant level of the'supply chamber, a supply channel connected to said chamber and the supply chamber, and a second supply channel connected to the common chamber and the atmospheric well; substantia lly as described. h

.- 10. A carbureter comprising a float chamber, an oil feed leading thereto, a float in said chamber for maintaining a constant level thereinya vertical jet tube, an atmosphericwell between the jet tube and the float chamber, a common chamber below the constant level of the oil in'thefloat chamber and communicating with the jet feed, an oil supply channel communicating with said cominon chamber and the atmospheric well, and i an oil supply channel communicating with the common chamber and the float chamber, said channels being arranged to constantly feed fuel during operation; substantially as described.

11. A carbureter having a constant level chamber and an atmospheric well open to the air, a common chamber supplying'the jet opening, two channels having controlling.

openings leading from the constant level chamber, one leading to the well and the other to the common chamber, and achannel having a control opening'leading from. the well to the common. chamber, the well having a supply channelleading to the carbureting chamber at a point above the jet; substantlally as'described.

12. A carbureter having a constant level chamber and an atmospheric Well open to the air, a common, chamber supplying the jet opening, two channels, having controlling openings leading from, the constant level chamber, one leading to the well and the other to the common chamber, a channel having a control opening leading from the well to the common chamber, and means for ad usting the size of the air opening into the well; substantially as described.

13. In a carbureter, an air passage, a con stant level fuel, chamber, an atmospheric well open to the air, a fuel supply to said well,'an outlet from the lower .part of the well, an L-shaped fuel supply passage comterminating at the other end in said air passage, and an additional fuel supply leading from the constant level chamber and discharging into'said Lshaped passage below the normal level of the fuel, substantially as described.

14. In a carbureter, an air passage, a con- -municating at one end with said outlet and aeaea'm stantlevel fuel chamber an atmospheric shape& passage below thevnormal level of 10 Well open to the air, a fuel supply to said the fuel, substantially as described. Well, a calibrated control outlet from the In testimony whereof, I have hereunto set lower partof the Well, an L-shaped fuel my hand.

supply passa e communicating at one end T with said outlet and terminating at the other ENOGAT PRADLER end in said air passage, and an additional Witnesses:

fuel supply leading from the constant levelv F. D. VAN ALLEN? fuel chamber and discharging into said. B; I H. W. PROCTOR.

Images