US1180389A - Carbureter. - Google Patents

Description

T. E. FRIEND.

CARBURETER.

APPLICATION m50 ocT. I6. |914.

Patented Apr. 25, 19116u 2 SHEETS-SHEET l.

@f WM MM JMJ/M ma? WW@ T. E. FRIEND.

CARBURETER.

APPucATloN man ocr. 16, 1914.

Patented Apr. 25,1916,

2 SHEETS-SHEET 2.

, [JV WE1/V T012.

' Ganzen-BETER.

Maaate.

Speciication of Letters Patent.

Patented Apr.. 25, 151116.

Application led October 16, 1914. Serial No. 866,990.

To all whom t may concern: l'

Be it known that 1, 'llHnoDoRE E. FRIEND,

- a citizen of the United States, and a resident of Norwalk, in the county of Huron 4and State of Ohio, have made certain new and useful Improvements in Carbureters, of which the following is a specification.

My invention relates to improvements in carbureters, and it consists in the constructions, combinations and arrangements herein described and claimed.

An object of myvinvention is to provide a device in which the regulation is practically maintained by the velocity of the air flow as a separate factor.

A further object of my invention is to provide an eective means for balancingthe fluid head pressure against a regulating valve such that the first said object can be accomplished. 1

A further object of my invention is to provide a form of air passage and a form of regulating valve `such that the aforesaid ob* jects can be accomplished with. as little friction as possible.

A further object of my invention is to dispose the fuel jet in reference to the aforesaid form of air passage such that a thorough mixing of the air and fuelis accomplished.

A further obj ect of my invention is to provide means for regulating the primary opening or aperture thereby allowing of closer.

adjustments.

The following specification and the appended claims make clear my invention in detail. j

My invention is illustrated in the accompanying drawings which form a part of this application in which- Figure 1 is a vertical sectionthrough the device, Fig. 2 is a plan'view of the float chamber with the integral air passage and the float in place, Fig. 3 is a plan view of the cover'removed, Fig. 4 is a front view o f the float chamber with the integral air passage, Fig. 5 is a front view of the air valve housing with the segment of a cylinder integral and the air valve and oscillating plate in place, and Fig. 6 is a-plan view of the air valve with the attached oscillating plate.

In carrying out my invention ll provide a main casing 1, the interior of which constitutes afloat chamber2. v The casing 1 is provided with an extension 3, which forms a valve chamber 4. A float valve needle 5 is arranged within the valve, chamber 4 to close the fuel inlet 6. The float valve needle- 5 is carried by the outward end ofthe float lever 7 by means of the ball joint 8. 60 The float lever \7 is hinged on a pivot 9 carried by the walls of the extension 3. The float 10 is carried by the inward end of the v Hoat lever 7'by means of the screw 11. A removable cap 12 is providedH for thevalve 65 chamber 4 to allow inspection and assembling.

Integral with the main casing 1 are the walls 13 forming the portion of the air passage 14 which is curved and of triangular v70 rcross-section. "llhe lower portion of the walls 13 terminate in the flange 15, while the upper portions terminate free and central within the upper portion of the main casa ing 1. A cover 16 is arranged to rest upon the open end of the main casing 1, and upon the free ends of the walls 13. An extension 17 is provided on the cover 16, that conforms with and fits around the free ends of the walls 13, thus providing a depression into which the gasket 18 is placed to provide a gas tight joint. The cross-section of the air passage 14 is arranged such that two of the walls 13 form the convex side of the air 85 passage 14, while the third of the walls 13 forms the concave side of the air passage 14. Central of the bend and on the convex side of the air passage 14 within the walls 13 is disposed the fuel jet 19, driven or screwed into a boss 20. 1n the concavity of the bend of the air passage 14 and integral with the walls 13 is formed the boss 21, and coincidently on the periphery of the cover 16 is a second boss 22. A fuel adjusting needle 52 istted into the bosses 21 and 22, screwing into the former and extending through the air passage 14, enters the fuel inlet 23 on n a taper. j

On the top face of they cover 16 is formed 100 a flange 24, and upon this flange rests the outlet tube 25 by meanscof a similar flange 24. The passage way 26 of the outlet tube 25 is of triangular cross-section at thebotv tom and merges into a circular cross-section at the outlet. A butter-fly throttle valve 27 is disposed in the outlet of the outlet tube 25. A short passage way 28 is provided centrally provided with a similar flange 15.

through the cover 16. The cross-sections of the passages 14, 26 and 28 coincide to form a -continuous passage-way. The outlet tube 25 and the cover 16 are held to the main'cas- 5 ing 1 by means of screws passing through the flanges 24 and 24 and screwed into the bosses 29 provided coincidently on the main casing 1 within the float chamber 2.

On linewith the fuel jet 19, within the 1o main casing 1, is provided a boss with a Ithreaded aperture into which the filler plug 30 is screwed, forthe purposes of providing means for introducing the fuel jet 19. l

Upon the flange 15 rests a valve casing 31 Screw holes 32 aretappedl into the flange 15 and screws are provided to clamp the two flanges 15 and 15 together. The general cross-section of the valve casing passage way 53 is triangular and coincides with that ofthe passage 14 to form a continuous passage. A flange 33 is provided on the inlet end of the valve'casing 31, upon which rests aninlet tube 34 provided with a similar flange 33.

The passage-way 35 of the inlet tube 34 is of triangular cross-section at the inward end and coincides with that of the passage-way 32, while the outer portion merges into a circular cross-section. On thev dividing line between the inlet tube 34 and the lValve casing 31 in the upper ,portion of the passages 32 and 35 is disposed a pivot 36 extending into bearings providedin the flanges 33 and 33. Around the pivot 36 and continuouswith the 35 passage-way 32 is formed a quarter segment of a cylinder 37 within extending walls 38 of the valve casing 31. An extension 33 of the flange 33 is provided to cover the vouter portion of the segment of a cylinder 37. A

40 portion of the inlet tube 34 is extended at 39 around the pivotv36to provide the opening 40 around the upper portion of the pivot 36 into the segment of cylinder 37.

A flat swinging valve 41 of triangular 45 cross-section is fastened upon the pivot 36 on a base side and extends at an angle into the passage-way 32: An oscillating plate 42 is fastened on one side to the pivot 36, and is made to rotate within the segment of cylinder 37 With a close fit. A boss 43 is formed upon the extension 38, and anl adjusting screw 44 is screwed through the boss 43 into the segment of cylinder 37. A lock nut 45 provides means for maintaining the adjust-, ment Iof the screw 44. Engaged between the 41 and maintains a certain open position of the valve 41 in reference to the angular walls 51.

As the fuel enters into the float chamber the float rises until the valve needle 5 closes the fuel inlet 6. The suction of the engine will cause fuel to be drawn through the fuel jet 19 and sprayed into the air passage through the fuel inlet 23 when the needle valve 52 is open. The needle valve 52 provides la means of spreading the spray such, that it may be used more eiiiciently. The float maintains a nearly constant level of fuel within the float chamber in reference to the fuel inlet 23.

It will be noticed that the fuel inlet 23 being in the apex of a cross-section of the passage 14 has a tendency to provide a spray that lls the cross-section of the passage such that very little air can slip by without being carbureted.

In the operation of the air valve 41, the oscillating plate 42 within the segment of cylinder 37 provides a means for maintaining a balanceagainst the fluid head pressure upon the valve 41, thus allowing the air velocity to mainly operate the valve. The advantage of this is great for the air velocity 4varies at a ratio with the engine speed and is uninfluenced by the throttle positions, therefore more constant mixtures are generated irrespective to the throttle positions, and greater accelerations'are possible at any speed or load.

It will be observed that the area of the voscillating plate 42 is shown as being of less area than that of the valve 41. Also that the mean effective turning moments are of different magnitude, for these members are of different shape. Whereas it is desired to have a practically perfect balance maintained against the fluid head pressure upon the valveV 41, by means of the oscillating plate 42, it can be proven, experimentally, that when this balance is obtained the area of the valve 41 is greater than the area of the plate 42. This difference of area is accounted for by the fact that the atmospheric pressure upon the member 42 is static, while vupon the valve 41 it is not. In other words, the flowofthe air into the passagewayhas the tendency to lessen the atmospheric pressure upon the valve 41.

It will be noticed that the air has `a very free ingressinto the air passage by the valvfe 41 as there are no sharp corners to turn. This is an advantage in helping to make the carbureter eficie'nt. Y I

Another feature of my invention is the means provided for adjusting the primary opening. This is accomplished by using a swinging triangular valve disposed at an angle withinv a passage of triangular crosssection whereby a valve action is maintained between the free angular edges of the valve and the adjacent angular sides of the passage, and using an adjusting screw for normally keepingv the valve a portion ofthe way open. j The object in using a swinging air valve in combination with the oscillating plate and a segment of a radial cylinder instead of using a circular air valve in combination witha circular piston and cylinder for the same purpose is that the swinging air valve can be made to operate with less friction, and the effect of the velocity, which is of small magnitude, is magnified upon a swinging valve disposed at an angle.

Although I indorse lthe construction as herein described, I do not limit myself to that construction only, for there are numerous other combinations for accomplish'y ing the same purpose.

I claim l. A carbureter comprising an air' pas'- sage, a fuel inlet disposed within said air passage, an inwardly opening, automatic, air regulating valve mounted to operate in conjunction with and normally close the inlet end of said air passage eXcept for a primary inlet adjacent to said valve into said air passage, a chamber loH-set to and contiguous with said air passage and adjacent to said valve, an extension of Asaid valve arranged to operate .with a'close and constant fit within said chamber and conjunctly with said valve, such that a constant counteraction is maintained against the effect of the suction pressure upon said valve, and said valve arranged to receive the impact of the air flow into said air passage.

2. A carbureter comprising an air passage of triangular cross-section, a Lfuel inlet disposed within said air passage, means for providing a constant head pressure of fuel to said fuel inlet, a pivot arranged on a side of the inlet end of said air passage, a swinging, inwardly opening, automatic, air regulating valve of triangularj cross-section arranged on a side on said pivot such that a valve action is provided between the free angular sides, thereof, and the adjacent angular walls of said air passage, a primary inlet adjacent to said valve into said air passage, means for providing a resilient reaction upon said valve, 'a chamber contiguous with said air passage radially around said pivot, and anextension of said valve arranged to oscillate with a close fit within said chamber and conjunctly with said valve, for the purpose of providing a counteraction against the suction pressure upon said valve. l

3. A carbureter comprising an air passage of triangular cross-section, a fuel inlet disposed within said air passage, a float chamber operating conjunctly with said fuel inlet, a pivot arranged on a side of the inlet fend' of said air passage, \a swinging, in-

wardly opening, automatic, air regulating valve of triangular cross-section arranged on a |side on said pivot, such that a valve action is provided between the free angular sides, thereof, and the adjacent angular walls of said air passage, means for adjusting said valve partially open to provide a primary inlet adjacent to said valve into said air passage, means for providing a resilient reaction upon said valve, a segment sides forms the ooncavity of said bend and the oppositely adjacent sides form the conveXity of said bend, the free ends of said air passage forming the inlet and outlet, respectively, to said air passage, a fuel inlet disposed on the convex side of said air passage, a pivot arranged in the inlet end of said air passage on the side contiguous to said concave portion of said air passage, a swinging, inwardly opening, automatic, air regulating valve of triangular shape arranged on a side on said pivot, extending across said air passage inwardly at an angle, and performing a valve action between the free angular sides, thereof, and the adj aeent angular walls of said air passage, a segment of a cylinder contiguous with said air passage radially around said pivot, a plate arranged on a side on said pivot to oscillate within said segment of cylinder with a close t and cor'ljunctly with said valve, for the purpose .set forth, means for providing a resilient reaction upon said valve, and a primary inlet adjacent to said valve into said air passage.

5. A carbureter comprising an air passage of triangular cross-section, a fuel inlet disposed within said air passage, a pivot arranged on a side of the inlet end of said air passage, a swinging, inwardly opening, automatic, air regulating valve of triangu- Vlar shape arranged on a side on said pivot such that a valve action is provided between the free angular sides'of said valve and the adjacent angular walls of said air passage, a primary inlet adjacent to said valve into said air passage, and means for providing a resilient reaction upon said valve.

6. A carbureter comprising an air'passage of triangular cross-section, a fuel inlet disposed in the apeXof a cross-section of said air passage,and means for spreading the discharge from said fuel inlet outwardly toward the angular walls, of said air passage confning said fuel inlet.

'7. A carbureter comprising a curved air eharge from said fuel inlet outwardly passage of trangular'cross-section with two toward the angular Walls of said air pas- 10 ofd th; angular Walls. forming1 thl (mvez sage confining saidfuel inlet. si e`o sai air passage, and t e t i1' Wal 5 forming the concave side of said air passage, THEOD'ORE E' FRIEND' a fuel inlet on the convex side of said air Witnesses: l passage in the apeX of a cross-section, E. J. KINGSBURY, thereof, and means for spreading the dis- H. SELIGER.

Images